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Last update: 2017-07-26

VdS FG

- Bright Nebulas -

Aur (7) Cep (10) Gem (1) Per (4) Tau (6)
Cam (2) CMa (1) Mon (3) Ser (1) Tri (4)
Cas (8) Cyg (11) Ori (14) Sgr (2) Vul (2)

Cas A (BN)

DSS
© DSS II (red) - 8×8'
Name: Cas A
Type: BN, EN
Constellation: Cas
Coordinates: 23h23m24.00s / +58°48'54.0"
Brightness / Size: - / 4.0×4.0'
8" f/6, 133x + UHC, Bortle 4, SQM-L 21.0
2014-11-23: After some problems with orientation I've found the correct position to see at the end nothing ;-) I've tried magnifications of 96x and 133x with UHC & [OIII] filter.
FAILED

Ced214 (BN)

DSS
© DSS II (red) - 80×80'
Name: Ced214, LBN581, Sh2-171
Type: BN, EN
Constellation: Cep
Coordinates: 00h03m30.00s / +67°07'00.0"
Brightness / Size: - / 50.0×40.0'
8" f/6, 37x + [OIII], Bortle 4
Before upcoming clouds I could see a very large, irregular brightening. Overall fairly bright, but due to the size this nebula can be easily overlooked.
EASY

HH164 (BN)

DSS
© DSS II (blue) - 5×5'
Name: HH164
Type: BN, RN
Constellation: Cas
Coordinates: 00h11m26.10s / +58°49'29.0"
Brightness / Size: - / -
Herbig-Haro object caused by the young variable star V633 Cas. Visible is the surrounding dust envelope. The southeastern extension on the DSS image is HH161.

8" f/6, 171x, Bortle 4-, NELM 5.7+, SQM-L 20.9
Very compact, in comparison to the surrounding stars diffus and somewhat extended. The southeastern extension (HH161) wasn't visible.
MODERATE

HH215 (BN)

DSS
© DSS II (blue) - 5×5'
Name: HH215, GM1-29, Gyulbudaghians Nebula
Type: BN, RN
Constellation: Cep
Coordinates: 20h45m53.50s / +67°57'50.0"
Brightness / Size: - / -
PV Cephei is a so called Young stellar object, a star in its early stage of evolution. Associated with this star is the extremely variable reflection nebula GM1-29, a Herbig–Haro object (HH), which was invisible over several years even to larger telescopes. There seemed to be an outburst in the year 2013, so that the nebula could be seen even in smaller telescopes. I also read about some successful observations with 12". Reiner Vogel (a well known German observer) also confirmed this outburst on his webpage. A very interesting object, worthwile to visit it every year!

8" f/6, 210x, Bortle 4
2013-09-07: I could saw this nebula as extremely faint, roundish brightening, held permanently with averted vision. Two days later I could repeat this observation, where I glimpsed the nebula for sure.

DIFFICULT
8" f/6, 150x, Bortle 4, NELM 6.1, SQM-L 21.1
2014-08-19: Faint, but fairly well visible with averted vision as small, diffuse brightening. Let's see, how the nebula will develop in the next months.

MODERATE
8" f/6, 171x, Bortle 4, NELM 6.0+, SQM-L 21.1
2014-09-28: Relatively compact, roundish brightening. Quite well seen with averted vision, but definitely not evident.

MODERATE
18" f/4.5, 205x, Bortle 4, NELM 6.0+, SQM-L 21.1
2014-09-28: Evident with averted vision, triangle-shaped (comet-like), southern end brighter and more defined, to the north fan-shaped and more diffuse, but overall quite well defined. In few moments a stellar brightening appeared at the southern end (PV Cephei?).

EASY
8" f/6, 150x, Bortle 5+, SQM-L 20.9
2015-08-15: Small, round, evenly bright nebula. Almost evident with averted vision.
MODERATE

IC59 (BN)

DSS
© DSS II (blue) - 15×15'
Name: IC59, LBN620
Type: BN, EN, RN
Constellation: Cas
Coordinates: 00h57m23.00s / +61°08'24.0"
Brightness / Size: - / 10.0×10.0'
8" f/6, 80x + UHC, Bortle 4, SQM-L 21.0
[OIII] filter also didn't showed anything.
FAILED

IC63 (BN)

DSS
© DSS II (blue) - 15×15'
Name: IC63, LBN622
Type: BN, EN
Constellation: Cas
Coordinates: 00h59m31.00s / +60°55'30.0"
Brightness / Size: - / 10.0×10.0'
8" f/6, 80x + UHC, Bortle 4, SQM-L 21.0
Also tried an [OIII] filter.
FAILED

IC348 (BN)

DSS
© DSS II (blue) - 10×10'
Name: IC348, LBN758
Type: BN
Constellation: Per
Coordinates: 03h44m34.00s / +32°09'48.0"
Brightness / Size: - / 10.0×10.0'
8" f/6, 66x, Bortle 4-
Beginning from a small group of stars I could see a diffuse brightening towards SE with averted vision.
MODERATE

IC349 (BN)

DSS
© DSS II (blue) - 5×5'
Name: IC349, Barnard's Merope Nebula
Group: Pleiades
Type: BN, RN
Constellation: Tau
Coordinates: 03h46m21.30s / +23°56'28.0"
Brightness / Size: v13.0 mag / 0.5×0.5'
IC349 is a very small, interstellar dust cloud, which passes the bright star Merope deforming the nebula. Visually very challenging due to the short angular distance. Unfortunately the nebula isn't visible on the alongside DSS image.

8" f/6, 200x, Bortle 4
Only tried short with a 6mm ortho.
FAILED

IC410 (BN)

DSS
© DSS II (red) - 50×50'
Name: IC410, LBN807
Type: BN, EN
Constellation: Aur
Coordinates: 05h22m30.00s / +33°23'00.0"
Brightness / Size: - / 50.0×50.0'
8" f/6, 37x + UHC, Bortle 4
Seen as an evident brightening with a dark notch. Looks like a 'V'. Without any filter I saw nothing.
EASY

IC417 (BN)

DSS
© DSS II (red) - 15×15'
Name: IC417, LBN804, Spider Nebula
Type: BN, EN
Constellation: Aur
Coordinates: 05h28m15.00s / +34°25'00.0"
Brightness / Size: - / 13.0×10.0'
8" f/6, 66x + UHC, Bortle 4
Tried at 37x & 66x with UHC filter without success.
FAILED

IC434 (BN)

DSS
© DSS II (red) - 80×80'
Name: IC434
Type: BN, EN
Constellation: Ori
Coordinates: 05h41m00.00s / -02°30'00.0"
Brightness / Size: - / 70.0×30.0'
8" f/6, 66x + [HBeta], Bortle 4
Easily visible, especially when moving the telescope around. Overall very diffuse, particularly to the west end. A more sharply defined edge on the eastern side wasn't visible to me. Maybe my [HBeta] filter has a slightly shifted filter curve!? The Horsehead Nebula (B33) wasn't visible.
EASY

IC443 (BN)

DSS
© DSS II (red) - 80×80'
Name: IC443
Type: BN
Constellation: Gem
Coordinates: 06h16m40.00s / +22°30'00.0"
Brightness / Size: - / 50.0×40.0'
Supernova remnant.

8" f/6, 80x + [OIII], Bortle 4, NELM 5.9+, SQM-L 21.0
SQM-L 20.8: Comparable with the observation in the 12.5 inch Dobsonian, just a bit fainter. At 37x with [OIII] filter the nebula was quite faint with averted vision.

MODERATE
12.5" f/4.5, 45x + [OIII], Bortle 4, NELM 5.9+, SQM-L 21.0
SQM-L 20.8: At 45x with [OIII] filter the nebula appeared as a curved brightening with some embedded stars. It is the brightest part of IC443 in the northeast. In the south there was a notch, so that the nebula looked like a fishhook. A magnification of 72x with [OIII] didn't showed more details. Without any filter the nebula was just a faint, structureless glow at 72x.
EASY

IC1318 (BN)

DSS
© DSS II (red) - 100×100'
Name: IC1318, Butterfly Nebula, Gamma Cygni Nebula
Type: BN, EN
Constellation: Cyg
Coordinates: 20h25m50.00s / +40°10'30.0"
Brightness / Size: - / 45.0×20.0'
IC1318 describes a large HII region around gamma Cyg (Sadr). The alongside DSS image shows only the Butterfly Nebula, which is one of the brightest parts located to the east of gamma Cyg. The name Butterfly Nebula is also used for a planetary nebula in the constellation Ophiuchus (Oph) with the designation M2-9 (PK10+18.2).

8" f/6, 37x + [HBeta], Bortle 5
Also visible with UHC filter with averted vision. The Butterfly Nebula was quite evident, crossed by the dark nebula LDN889. Around gammy Cyg (Sadr) there are some more, fainter brightenings visible. Unfortunately some clouds shortened this observation.
EASY

IC1396 (BN)

DSS
© DSS II (blue) - 90×90'
Name: IC1396
Type: BN, EN
Constellation: Cep
Coordinates: 21h40m00.00s / +57°41'00.0"
Brightness / Size: - / 165.0×135.0'
8" f/6, 37x + [OIII], Bortle 4+
Very large, faint, rutted. Similar to NGC7000, but much more fainter.
EASY

IC1470 (BN)

DSS
© DSS II (blue) - 5×5'
Name: IC1470, Sh2-156
Type: BN, EN
Constellation: Cep
Coordinates: 23h05m09.90s / +60°14'31.0"
Brightness / Size: b11.5 mag / 2.0×2.0'
8" f/6, 37x + [OIII], Bortle 4 FAILED

IC5067 (BN)

DSS
© DSS II (red) - 90×90'
Name: IC5067, IC5070, Pelican Nebula
Type: BN, EN
Constellation: Cyg
Coordinates: 20h51m30.00s / +44°05'00.0"
Brightness / Size: v8.0 mag / 60.0×50.0'
8" f/6, 37x + [OIII], Bortle 4
Relatively large, fainter than NGC7000, but nevertheless obvious, irregular shape with many differences in brightness. The evident stars 56 & 57 Cyg are located within the nebula. Northern part most evident.
EASY

IC5076 (BN)

DSS
© DSS II (blue) - 20×20'
Name: IC5076
Type: BN, EN, RN
Constellation: Cyg
Coordinates: 20h55m35.00s / +47°24'30.0"
Brightness / Size: - / 7.0×7.0'
8" f/6, 96x, Bortle 5+, NELM 5.7+, SQM-L 20.9 FAILED

IC5146 (BN)

DSS
© DSS II (red) - 15×15'
Name: IC5146, Sh2-125, Cocoon Nebula
Type: BN, EN, RN
Constellation: Cyg
Coordinates: 21h53m30.00s / +47°16'00.0"
Brightness / Size: v7.2 mag / 12.0×12.0'
8" f/6, 80x + UHC, Bortle 4, SQM-L 21.0
Quite faint, roundish, evenly bright. Less evident with averted vision.
MODERATE

M1 (BN)

DSS
© DSS II (blue) - 8×8'
Name: M1, NGC1952, Crab Nebula
Type: BN, EN
Constellation: Tau
Coordinates: 05h34m31.94s / +22°00'52.2"
Brightness / Size: v8.4 mag / 8.0×4.0'
B 40mm, 8x, Bortle 7, NELM 4.5, SQM-L 18.9
SQM-L 18.5: Only a miserable try ;-)

FAILED
B 40mm, 8x, Bortle 4-, NELM 5.7+, SQM-L 20.9
Relatively small, roundish, evenly bright. Fairly well seen with averted vision.

MODERATE
4.5" f/8, 28x, Bortle 6
Obvious as slightly oval, evenly bright nebula.

EASY
8" f/6, 37x, Bortle 5
At 37x oval, evenly bright. Near the edges slight darkening outwardly. At 100x irregular shape. Slight differences in brightness within the nebula were guessable. At 150x mottled. On the eastern edge I could saw a dark notch with averted vision.
EASY

M8 (BN)

DSS
© DSS II (red) - 80×80'
Name: M8, NGC6523, Lagoon Nebula
Type: BN, EN, RN
Constellation: Sgr
Coordinates: 18h03m37.00s / -24°23'12.0"
Brightness / Size: v6.0 mag / 60.0×40.0'
B 40mm, 8x, Bortle 4, SQM-L 20.9
Evident brightening with an embedded, slightly curved chain of 4 stars.

EASY
8" f/6, 37x + UHC, Bortle 4
Unfortunately quite low altitude with high light pollution. Without any filter only the brightest part was visible. The involved open cluster NGC6530 was more obvious. With UHC filter the nebula popped out and many details could be seen. Very impressive is the dark lane, which divides the nebula into two parts. Also the use of a [HBeta] filter preserves many details and gave a nice view.
EASY

M16 (BN)

DSS
© DSS II (red) - 100×100'
Name: M16, IC4703, Eagle Nebula
Type: BN, EN
Constellation: Ser
Coordinates: 18h18m48.00s / -13°48'24.0"
Brightness / Size: v6.4 mag / -
8" f/6, 37x + UHC, Bortle 4
Due to evident light pollution moderate conditions. Fairly well visible with averted vision. The nebula appeared irregular, whereby 3 triangle-like parts with outward corners come together. The shape of an eagle with spreaded wings was imaginable. However the embedded open cluster NGC 6611 was more evident.
MODERATE

M17 (BN)

DSS
© DSS II (red) - 60×60'
Name: M17, NGC6618, Omega Nebula, Swan Nebula
Type: BN, EN
Constellation: Sgr
Coordinates: 18h20m47.00s / -16°10'18.0"
Brightness / Size: v6.0 mag / -
B 40mm, 8x, Bortle 4, SQM-L 20.9
Evident, slightly elongated, evenly bright.

EASY
8" f/6, 37x, Bortle 5
Despite brightened sky the nebula is very obvious even without any filter due to its high surface brightness. With filter increasing contrast. Awesome view. Also different filters (UHC, [HBeta]) show interesting details. The swan shape is with and without a filter easily visible.
EASY

M42 (BN)

DSS
© DSS II (red) - 90×90'
Name: M42, NGC1976, Orion Nebula
Type: BN, EN, RN
Constellation: Ori
Coordinates: 05h35m17.30s / -05°23'28.0"
Brightness / Size: v4.0 mag / 90.0×60.0'
4.5" f/8, 28x, Bortle 6-, NELM 5.0, SQM-L 18.9
NELM 4.1+: Already pleasant without any filter with some details. With UHC and [OIII] impressive view with many details despite urban skies. Especially the southeastern wing was very great.

EASY
8" f/6, 37x, Bortle 4
Must be seen. Hardly describable ;-)
EASY

M43 (BN)

DSS
© DSS II (red) - 30×30'
Name: M43, NGC1982, H3.1
Type: BN, EN
Constellation: Ori
Coordinates: 05h35m31.00s / -05°16'12.0"
Brightness / Size: v7.0 mag / 20.0×15.0'
4.5" f/8, 28x, Bortle 6
Even under urban conditions with small aperture fairly well seen as faint brightening.

EASY
8" f/6, 37x, Bortle 4
Get lost in the brilliance of the great orion nebula. In comparison fairly small & faint, nearly evenly bright. Located slightly asymmetrical around a 6.75m star. Obvious more easily with averted vision.
EASY

M78 (BN)

DSS
© DSS II (red) - 15×15'
Name: M78, NGC2068
Type: BN, RN
Constellation: Ori
Coordinates: 05h46m45.96s / +00°03'37.8"
Brightness / Size: v8.3 mag / 8.0×6.0'
M78 is one of the brightest reflection nebulas and is therefore even under not so good conditions or smaller telescopes well observable.

B 40mm, 8x, Bortle 7, NELM 4.5, SQM-L 18.9
SQM-L 18.3: The sky was too brightened, so I saw nothing.

FAILED
B 40mm, 8x, Bortle 4-, NELM 5.7+, SQM-L 20.9
Rather compact, diffuse brightening. Barely seen with direct vision.

EASY
8" f/6, 37x, Bortle 4
Quite obvious with slightly irregular shape. Within the nebula the evident binary star BU559 (AC). Towards one side the nebula appears more sharply defined, towards south more diffuse.
EASY

NGC281 (BN)

DSS
© DSS II (blue) - 35×35'
Name: NGC281, IC11, Pacman Nebula
Type: BN, EN
Constellation: Cas
Coordinates: 00h52m25.10s / +56°33'54.0"
Brightness / Size: b7.3 mag / 35.0×35.0'
8" f/6, 37x + [OIII], Bortle 5+
Quite obvious, slightly irregular brightening with a dark notch. A more detailed observation is outstanding.
EASY

NGC588 (BN)

DSS
© DSS II (red) - 5×5'
Name: NGC588
Group: M33
Type: BN, EN, EG
Constellation: Tri
Coordinates: 01h32m45.20s / +30°38'54.0"
Brightness / Size: v13.5 mag / 0.7×0.7'
Emission nebula within the galaxy Messier 33.

8" f/6, 150x, Bortle 4
Quite compact, faint, barely permanently held with averted vision.
DIFFICULT

NGC592 (BN)

DSS
© DSS II (red) - 5×5'
Name: NGC592
Group: M33
Type: BN, EN, EG
Constellation: Tri
Coordinates: 01h33m11.00s / +30°38'42.0"
Brightness / Size: v13.0 mag / 0.7×0.5'
Emission nebula within the galaxy Messier 33.

8" f/6, 150x, Bortle 4
Compact brightening, which I can see with averted vision for sure.
DIFFICULT

NGC595 (BN)

DSS
© DSS II (red) - 5×5'
Name: NGC595
Group: M33
Type: BN, EN, EG
Constellation: Tri
Coordinates: 01h33m33.53s / +30°41'29.8"
Brightness / Size: v13.1 mag / 1.7×0.9'
Emission nebula within the galaxy Messier 33.

8" f/6, 150x, Bortle 4
Diffuse, slightly oval brightening. Quite well visible with averted vision.
MODERATE

NGC604 (BN)

DSS
© DSS II (red) - 5×5'
Name: NGC604, H3.150
Group: M33
Type: BN, EN, EG
Constellation: Tri
Coordinates: 01h34m33.56s / +30°47'03.5"
Brightness / Size: b11.5 mag / 1.9×1.2'
Brightest emission nebula within the galaxy Messier 33.

8" f/6, 100x, Bortle 4
Barely visible with direct vision, obvious with averted vision, relatively large, slightly oval, diffuse.
EASY

NGC1333 (BN)

DSS
© DSS II (blue) - 10×10'
Name: NGC1333
Type: BN, RN
Constellation: Per
Coordinates: 03h29m16.00s / +31°22'55.0"
Brightness / Size: - / 6.0×3.0'
8" f/6, 66x, Bortle 4-
At 37x the nebula appears roundish around a 10.47m star. At 66x and 96x more oval or slightly elongated besides this star, evenly bright, diffuse.
EASY

NGC1435 (BN)

DSS
© DSS II (blue) - 45×45'
Name: NGC1435, Merope Nebula
Group: Pleiades
Type: BN, RN
Constellation: Tau
Coordinates: 03h46m00.00s / +23°54'00.0"
Brightness / Size: - / 30.0×30.0'
8" f/6, 37x, Bortle 4
Located south of Merope, fan-shaped, broadly blending into the background, slightly curved. After longer observation the nebula was obvious with averted vision. It's useful to compare this region with the more darker surroundings!
EASY

NGC1491 (BN)

DSS
© DSS II (blue) - 9×9'
Name: NGC1491, H1.258
Type: BN, EN
Constellation: Per
Coordinates: 04h03m15.90s / +51°18'54.0"
Brightness / Size: b11.3 mag / 9.0×6.0'
8" f/6, 37x + [OIII], Bortle 4-, NELM 5.7+, SQM-L 20.9
Without any filter barely seen with direct vision, evident with averted vision, diffuse, evenly bright. With [OIII] filter evident with direct vision. Relatively small, bright. On the edge an 11.27m star.
EASY

NGC1499 (BN)

DSS
© DSS II (red) - 120×120'
Name: NGC1499, California Nebula
Type: BN, EN
Constellation: Per
Coordinates: 04h01m00.00s / +36°25'00.0"
Brightness / Size: v5.0 mag / 160.0×40.0'
4.5" f/8, 28x + [HBeta], Bortle 3, NELM 6.4
Barely visible with direct vision, with averted vision obvious. Very large, elongated, slightly curved brightening, which could be followed over the entire field of view of about 2.4° due to the usage of a 2" focuser. Overall very diffuse.

EASY
120mm f/5, 18x + [HBeta], Bortle 6-, NELM 4.8+, SQM-L 19.1
With UHC filter not visible, with [HBeta] filter seen as large, rather elongated brightening without any details. The shape appeared irregular, the edges itself quite diffuse.

MODERATE
8" f/6, 28x + UHC, Bortle 4
Very large and diffuse, evident with averted vision, when comparing with the surroundings. Moving the telescope can help. With [HBeta] filter slightly more contrast. Within the nebula I noticed some differences in brightness. Even without any filter the nebula was visible with averted vision, but fairly faint.
EASY

NGC1555 (BN)

DSS
© DSS II (blue) - 5×5'
Name: NGC1555, HH155, Hind's Variable Nebula
Type: BN, RN
Constellation: Tau
Coordinates: 04h21m57.10s / +19°32'07.0"
Brightness / Size: - / -
8" f/6, 171x, Bortle 4, SQM-L 21.0
At 150x & 171x without success.
FAILED

NGC1788 (BN)

DSS
© DSS II (red) - 10×10'
Name: NGC1788, LBN916, H5.32, Bat Nebula
Type: BN, RN
Constellation: Ori
Coordinates: 05h06m54.00s / -03°20'30.0"
Brightness / Size: b5.8 mag / 5.0×3.0'
8" f/6, 37x, Bortle 4+
With averted vision well visible as faint brightening nearby a moderately bright star. At 80x I could see a more fainter, but evident star within the nebula.
MODERATE

NGC1931 (BN)

DSS
© DSS II (blue) - 5×5'
Name: NGC1931, H1.261
Type: BN, EN, RN
Constellation: Aur
Coordinates: 05h31m26.60s / +34°14'58.0"
Brightness / Size: v10.1 mag / 3.0×3.0'
8" f/6, 37x, Bortle 4-
Very small, bright. At 80x more extended.
EASY

NGC1973 (BN)

DSS
© DSS II (red) - 10×10'
Name: NGC1973
Group: Running Man
Type: BN, EN, RN
Constellation: Ori
Coordinates: 05h35m04.80s / -04°43'54.7"
Brightness / Size: v7.0 mag / 5.0×5.0'
4.5" f/8, 28x, Bortle 6
Barely visible with averted vision as a halo around the "central star".

DIFFICULT
8" f/6, 37x, Bortle 4
Relatively small, roundish, evenly bright.
MODERATE

NGC1975 (BN)

DSS
© DSS II (red) - 10×10'
Name: NGC1975
Group: Running Man
Type: BN, EN, RN
Constellation: Ori
Coordinates: 05h35m18.10s / -04°41'05.0"
Brightness / Size: v7.0 mag / 10.0×5.0'
8" f/6, 37x, Bortle 4
Not seen at 37x and 80x, even with UHC & [OIII] filter.
FAILED

NGC1977 (BN)

DSS
© DSS II (red) - 40×40'
Name: NGC1977, H5.30
Group: Running Man
Type: BN, EN, RN
Constellation: Ori
Coordinates: 05h35m16.00s / -04°49'15.0"
Brightness / Size: v7.0 mag / 20.0×10.0'
8" f/6, 37x, Bortle 4
Evenly bright, slightly curved. 3 stars within the nebula. Evident with averted vision.
EASY

NGC1980 (BN)

DSS
© DSS II (red) - 14×14'
Name: NGC1980, H5.31
Type: BN, EN
Constellation: Ori
Coordinates: 05h35m24.00s / -05°54'54.0"
Brightness / Size: - / 14.0×14.0'
8" f/6, 37x, Bortle 4
Visible as obvious halo around the 2.75m star iota Ori. Seem to be a bit more brighter to one side. However the very bright iota Ori can pretend a nebula!
EASY

NGC1985 (BN)

DSS
© DSS II (blue) - 5×5'
Name: NGC1985, H3.865, PK176+0.1
Type: BN, RN
Constellation: Aur
Coordinates: 05h37m47.80s / +31°59'24.0"
Brightness / Size: v12.5 mag / 0.7×0.7'
8" f/6, 150x, Bortle 4
Roundish, diffuse, nearly evenly bright nebula.
MODERATE

NGC1999 (BN)

DSS
© DSS II (red) - 5×5'
Name: NGC1999, H4.33, Keyhole Nebula
Type: BN, RN
Constellation: Ori
Coordinates: 05h36m25.00s / -06°42'42.0"
Brightness / Size: b9.5 mag / 2.0×2.0'
8" f/6, 200x, Bortle 4
Already visible at 80x around the bright 10.3m star with averted vision, fairly bright, but compact. Looks like a fuzzy star. At 200x the nebula is evident with averted vision, appears irregular, slightly shifted around the bright star. The darkening (keyhole) stayed hidden to me. I think, that the seeing has influence on the visibility.

EASY
12" f/5, 200x, Bortle 3, NELM 6.4
Well visible with averted vision as diffuse, irregular nebula around the bright star. The keyhole as small darkening was also well seen.
EASY

NGC2024 (BN)

DSS
© DSS II (red) - 30×30'
Name: NGC2024, H5.28, Flame Nebula
Type: BN, EN
Constellation: Ori
Coordinates: 05h41m43.00s / -01°50'30.0"
Brightness / Size: - / 30.0×30.0'
8" f/6, 66x + UHC, Bortle 4
This observation was some time ago. However I could barely see a irregular brightening with direct vision, which was most evident when moving the telescope around. To keep the bright Alnitak (zeta Ori) out of the field of view I used an 18mm ortho.
EASY

NGC2174 (BN)

DSS
© DSS II (red) - 50×50'
Name: NGC2174, Monkey Head Nebula
Type: BN, EN
Constellation: Ori
Coordinates: 06h09m42.00s / +20°30'00.0"
Brightness / Size: v6.9 mag / 40.0×30.0'
8" f/6, 37x + [OIII], Bortle 4, NELM 6.0, SQM-L 20.9
Evident with direct vision, but overall very diffuse with less defined edges, irregular shape. Appeared about 20 arcminutes large. The shape of a monkey head was not noticeable. Apparent "central star" within the nebula. Also with UHC filter well visible.
EASY

NGC2237-39 & NGC2246 (BN)

DSS
© DSS II (red) - 100×100'
Name: NGC2237-39 & NGC2246, Rosette Nebula
Type: BN, EN
Constellation: Mon
Coordinates: 06h32m00.00s / +05°00'00.0"
Brightness / Size: v6.0 mag / 80.0×60.0'
8" f/6, 37x + [OIII], Bortle 4
Evident, bright, very irregular shape with many details. Without a filter the embedded open cluster NGC 2244 is more obvious.
EASY

NGC2261 (BN)

DSS
© DSS II (blue) - 5×5'
Name: NGC2261, H4.2, Hubble's Variable Nebula
Type: BN, RN
Constellation: Mon
Coordinates: 06h39m10.00s / +08°45'00.0"
Brightness / Size: v9.0 mag / 2.0×1.0'
8" f/6, 37x, Bortle 4, SQM-L 21.0
SQM-L 20.5: At 37x evident as small, bright nebula, whereas the typical comet shape was only visible with averted vision. At 80x bright, evident, fan-shaped. Tapered toward south and very well defined. At the southern end a 12.24 mag star visible with averted vision. The 'tail' was opened about 45° and faded out very diffusely into the background.
EASY

NGC2264 (BN)

DSS
© DSS II (blue) - 20×20'
Name: NGC2264, H5.27, H8.5
Type: BN
Constellation: Mon
Coordinates: 06h40m36.00s / +09°47'00.0"
Brightness / Size: - / 10.0×10.0'
NGC2264 describes a larger HII region, which includes the Cone Nebula, the Christmas Tree Cluster and the diffuse nebula described here. The DSS image alongside shows only an extract of this region.

8" f/6, 37x, Bortle 5
Diffuse brightening between a group of moderately bright stars southwest of 15 Gem, which I could fairly well see with averted vision.
MODERATE

NGC2359 (BN)

DSS
© DSS II (red) - 20×20'
Name: NGC2359, H5.21, Thor's Helmet, Duck Nebula
Type: BN, EN
Constellation: CMa
Coordinates: 07h18m30.00s / -13°13'42.0"
Brightness / Size: v11.4 mag / 10.0×5.0'
Wolf-Rayet ring nebula.

4.5" f/8, 28x + [OIII], NELM 5.0+
SQM-L 18.7, NELM 4.0, Moon (60% illuminated): Fairly well visible with averted vision, elongated, evenly bright. Brighter than expected. Also perceptible with UHC filter, but appeared obviously fainter.

MODERATE
8" f/6, 37x + [OIII], Bortle 4+, NELM 6.0+, SQM-L 21.1
NELM 5.0+, SQM-L 20.2: Without filter elongated, fairly faint. With UHC or [OIII] filter visible with direct vision, evident with averted vision, elongated (N-S). At the southern edge a bright extension towards SW. Otherwise evenly bright. [HBeta] without any effect.
EASY

NGC6813 (BN)

DSS
© DSS II (blue) - 5×5'
Name: NGC6813
Type: BN, EN
Constellation: Vul
Coordinates: 19h40m22.10s / +27°18'34.0"
Brightness / Size: - / 3.0×3.0'
8" f/6, 80x, Bortle 4, SQM-L 21.0
Relatively small, roundish, slight brightening towards the middle. Filter might help.
MODERATE

NGC6888 (BN)

DSS
© DSS II (red) - 25×25'
Name: NGC6888, LBN203, H4.72, Crescent Nebula
Type: BN, EN
Constellation: Cyg
Coordinates: 20h12m07.00s / +38°21'18.0"
Brightness / Size: v10.0 mag / 20.0×10.0'
8" f/6, 37x + [OIII], Bortle 4
Brightest part of this nebula is located between 4 brighter stars, which forms an evident parallelogram. The nebula itself appeared as a curved brightening, where the northern part is brighter and broader.
EASY

NGC6960 (BN)

DSS
© DSS II (red) - 80×80'
Name: NGC6960, H5.15
Group: Veil nebula (Western Veil/Witch's Broom)
Type: BN, EN
Constellation: Cyg
Coordinates: 20h46m10.00s / +30°40'00.0"
Brightness / Size: v7.0 mag / -
80mm f/6.25, 25x + UHC, Bortle 6-, SQM-L 19.5
Only the brightest part north of 52 Cyg was visible, but faint.

MODERATE
80mm f/6.25, 33x, Bortle 5, NELM 5.8, SQM-L 20.7

FAILED
4.5" f/8, 28x + [OIII], Bortle 6-, NELM 5.0, SQM-L 19.2
Evident with averted vision. The northern part most evident and sharply defined. The southern fainter part appeared in comparison very diffuse, but still well visible.

EASY
120mm f/5, 18x + [OIII], Bortle 6, SQM-L 19.5
Barely visible with direct, evident with averted vision. Northern part most easily seen, pretty thin, slightly curved and sharply defined. The sourthern part is wider and fades into the background.
EASY

NGC6992/5 & IC1340 (BN)

DSS
© DSS II (red) - 80×80'
Name: NGC6992/5 & IC1340, H5.14
Group: Veil nebula (Eastern Veil)
Type: BN, EN
Constellation: Cyg
Coordinates: 20h56m30.00s / +31°23'00.0"
Brightness / Size: v7.0 mag / -
Brightest part of the veil nebula. Consists of NGC6992, NGC6995 und IC1340. IC1340 is the fainter, southern part. Awesome view with [OIII] filter.

B 40mm, 8x, Bortle 5, NELM 5.5
Seen with averted vision as very faint, slightly curved brightening. Difficult to extract from the background. Only a wisp of nebula.

DIFFICULT
80mm f/6.25, 25x + UHC, Bortle 6-, SQM-L 19.4
Rather faint, curved brightening. Northern und southern part was most apparent.

MODERATE
80mm f/6.25, 33x, Bortle 5, NELM 5.8, SQM-L 20.7
Slightly curved, faint brightening with irregular shape.

MODERATE
120mm f/5, 18x + [OIII], Bortle 6, SQM-L 19.5
Easy to see and very evident. Northern and southern part most obvious, middle part visible with averted vision. The bifurcations in the southern part are well perceptible.

EASY
4.5" f/8, 28x + [OIII], Bortle 6-, NELM 5.0, SQM-L 19.2
Typical shape well seen, slightly curved. At the southern end the bifurcations ("fingers") well visible with averted vision.
EASY

NGC7000 (BN)

DSS
© DSS II (red) - 120×120'
Name: NGC7000, LBN373, H5.37, North America Nebula
Type: BN, EN
Constellation: Cyg
Coordinates: 20h58m47.00s / +44°19'48.0"
Brightness / Size: v4.0 mag / 120.0×30.0'
naked eye, UHC, Bortle 4
Holding a 2" UHC filter in front of my eye I could see the rough shape of the nebula with averted vision. Very large and more evenly bright.

MODERATE
B 40mm, 8x, Bortle 4, NELM 6.1, SQM-L 21.1
Unexpectedly easily seen with direct vision as large brightening and many foreground stars. Nearly evenly bright. The shape of North America was evident.

EASY
8" f/6, 37x + [OIII], Bortle 4
Easy to see, if you have a large true field of view. This nebula is extremely large and shows with [OIII] filter many extensions, notches and differences in brightness. The southern part (Mexico) is the brightest one and quite sharply defined, whereas towards the north the nebula gets fainter & more diffuse, blending more into the background.
EASY

NGC7023 (BN)

DSS
© DSS II (red) - 18×18'
Name: NGC7023, H4.74, Iris Nebula
Type: BN, RN
Constellation: Cep
Coordinates: 21h01m36.90s / +68°09'48.0"
Brightness / Size: v6.8 mag / 18.0×18.0'
8" f/6, 37x, Bortle 4
At first glance the 7.34m bright central star appears fuzzy. A closer look shows the nebula around this star as a quite obvious halo. At higher magnification (200x) some details were seen: Towards NNW the nebula was somewhat brighter, towards SSW I could saw an extension wiht a brighter knot. Overall the nebula appears very irregular with obvious differences in brightness. The open cluster Cr427, which is charted in Cartes du Ciel, stayed hidden to me. Just around the central star there are only some few, fainter stars.
EASY

NGC7129 (BN)

DSS
© DSS II (blue) - 5×5'
Name: NGC7129, LBN497, H4.75
Type: BN, RN
Constellation: Cep
Coordinates: 21h42m56.00s / +66°06'12.0"
Brightness / Size: - / 2.7×2.7'
8" f/6, 100x, Bortle 4+
A more fainter nebula, which is embedded in a quite small open cluster containing some moderately bright stars. The nebula appeared irregular. Evident with averted vision.
EASY

NGC7538 (BN)

DSS
© DSS II (red) - 12×12'
Name: NGC7538, LBN542, H2.706
Type: BN, EN
Constellation: Cep
Coordinates: 23h13m41.00s / +61°31'30.0"
Brightness / Size: - / 8.0×7.0'
8" f/6, 37x + [OIII], Bortle 5
Quite obvious, relatively small, roundish, evenly bright. Looks like a planetary nebula.
EASY

NGC7635 (BN)

DSS
© DSS II (red) - 20×20'
Name: NGC7635, H4.52, Bubble Nebula
Type: BN, EN
Constellation: Cas
Coordinates: 23h20m48.30s / +61°12'06.0"
Brightness / Size: v10.0 mag / 15.0×8.0'
8" f/6, 100x + [OIII], Bortle 4
Fairly well visible around the 6.94m star with averted vision. Quite evident, evenly bright.
MODERATE

Pickering's Triangular Wisp (BN)

DSS
© DSS II (red) - 80×80'
Name: Pickering's Triangular Wisp
Group: Veil nebula
Type: BN, EN
Constellation: Cyg
Coordinates: 20h48m30.00s / +31°38'00.0"
Brightness / Size: - / -
Pickering's Triangular Wisp is the third-brightest part of the well known Veil Nebula. While the two brighter parts (Eastern & Western Veil) are bright and well defined in their shape, this nebula is much more fainter and diffuse.

120mm f/5, 18x + [OIII], Bortle 6, SQM-L 19.5
Just a faint, irregular haze. Anything but evident.

MODERATE
8" f/6, 37x, Bortle 3, NELM 6.4
Without any filter the nebula is visible only under very clear, dark skies. Hardly perceptible with averted vision.

DIFFICULT
8" f/6, 37x + [OIII], Bortle 6+, NELM 5.3, SQM-L 19.7
Quite evident with averted vision as irregular brightenings in a field of about 2°.

MODERATE
8" f/6, 37x + [OIII], Bortle 4
Only under good conditions easily visible with direct vision, otherwise averted vision is necessary. Overall fairly faint, very diffuse, without any obvious differences in brightness. Spread over a large area like wisps of fog. Moving the telescope can help to extract the nebula from the star-rich surrounding.
EASY

Sh2-90 (BN)

DSS
© DSS II (red) - 10×10'
Name: Sh2-90, LBN144
Type: BN, EN
Constellation: Vul
Coordinates: 19h49m12.00s / +26°51'00.0"
Brightness / Size: - / 5.0×3.0'
8" f/6, 80x + UHC, Bortle 3, NELM 6.3+, SQM-L 21.3
I've tried this nebula several times, but always without success. I also used different filters.
FAILED

Sh2-101 (BN)

DSS
© DSS II (red) - 25×25'
Name: Sh2-101, Tulip Nebula
Type: BN, EN
Constellation: Cyg
Coordinates: 20h00m00.00s / +35°20'00.0"
Brightness / Size: v9.0 mag / 16.0×9.0'
8" f/6, 37x + UHC, Bortle 4, SQM-L 21.0
Rather faint, evenly bright, relatively large, very diffuse. Some brighter stars are embedded within the nebula.
MODERATE

Sh2-132 (BN)

DSS
© DSS II (red) - 60×60'
Name: Sh2-132
Type: BN
Constellation: Cep
Coordinates: 22h19m20.00s / +56°07'00.0"
Brightness / Size: - / 40.0×30.0'
8" f/6, 37x + [OIII], Bortle 4+ FAILED

Sh2-155 (BN)

DSS
© DSS II (red) - 25×25'
Name: Sh2-155, LBN529, Cave Nebula
Type: BN, EN
Constellation: Cep
Coordinates: 22h57m15.00s / +62°35'00.0"
Brightness / Size: v7.7 mag / 15.0×10.0'
8" f/6, 37x + [OIII], Bortle 4 FAILED

Sh2-157 (BN)

DSS
© DSS II (red) - 80×80'
Name: Sh2-157, LBN537
Type: BN, EN
Constellation: Cas
Coordinates: 23h15m30.00s / +60°10'00.0"
Brightness / Size: - / 60.0×50.0'
8" f/6, 37x + [OIII], Bortle 4
Vey large, diffuse, irregular brightening with brighter extensions. Within the nebula are many star chains. Unclear definition of the edges. Overall quite well visible.
EASY

Sh2-235 (BN)

DSS
© DSS II (red) - 12×12'
Name: Sh2-235
Type: BN, EN
Constellation: Aur
Coordinates: 05h41m00.00s / +35°51'30.0"
Brightness / Size: - / 8.0×8.0'
8" f/6, 37x + UHC, Bortle 4
Used magnifications from 37x to 66x with [HBeta]/UHC filter.
FAILED

Sh2-276 (BN)

Name: Sh2-276, Barnard's Loop
Type: BN, EN
Constellation: Ori
Coordinates: 05h27m30.00s / -03°58'00.0"
Brightness / Size: - / -
Covers a region of about 10x15°.

B 40mm, 8x, Bortle 4-, SQM-L 20.8
I used all available filters (UHC, [OIII] and [HBeta]) in front of the lens, but no nebula was visible.
FAILED

UGC3327 (BN)

DSS
© DSS II (blue) - 5×5'
Name: UGC3327, MCG+05-14-001
Type: BN, RN
Constellation: Aur
Coordinates: 05h36m40.90s / +31°51'16.0"
Brightness / Size: b13.0 mag / 2.5×2.5'
Quite interesting object, which is listed as a galaxy in the UGC/MCG, whereas in Simbad it is a reflection nebula. However to me it appears visually more as a reflection nebula due to the bright, stellar center (central star!?).

8" f/6, 150x, Bortle 4
Relatively bright central star, surrounded by an apparent halo, which gets darker towards the edges. Well visible with averted vision.
MODERATE

vdB1 (BN)

DSS
© DSS II (blue) - 10×10'
Name: vdB1
Type: BN, RN
Constellation: Cas
Coordinates: 00h10m46.37s / +58°46'10.3"
Brightness / Size: - / 5.0×5.0'
8" f/6, 96x, Bortle 4, SQM-L 21.0
I could see halos around the three rather bright stars, but also around other brighter stars. So I guess, that I didn't saw the nebula, because these halos were symmetrical around the stars.
FAILED

vdB14 (BN)

DSS
© DSS II (blue) - 40×40'
Name: vdB14
Type: BN, RN
Constellation: Cam
Coordinates: 03h31m00.00s / +59°45'00.0"
Brightness / Size: - / 30.0×15.0'
8" f/6, 80x, Bortle 4 FAILED

vdB15 (BN)

DSS
© DSS II (blue) - 40×40'
Name: vdB15
Type: BN, RN
Constellation: Cam
Coordinates: 03h29m55.00s / +58°55'00.0"
Brightness / Size: - / 35.0×25.0'
8" f/6, 80x, Bortle 4 FAILED

vdB20 (BN)

DSS
© DSS II (blue) - 20×20'
Name: vdB20, Electra Nebula
Group: Pleiades
Type: BN, RN
Constellation: Tau
Coordinates: 03h44m52.00s / +24°06'48.0"
Brightness / Size: - / -
8" f/6, 37x, Bortle 4
Quite easily visible as diffuse halo around Electra.
EASY

vdB23 (BN)

DSS
© DSS II (blue) - 35×35'
Name: vdB23, Alcyone Nebula
Group: Pleiades
Type: BN, RN
Constellation: Tau
Coordinates: 03h47m29.00s / +24°06'18.0"
Brightness / Size: - / 27.0×27.0'
8" f/6, 37x, Bortle 4
Apparent halo around Alcyone, towards north a bit brighter. Appeared smaller than the Merope Nebula.
EASY

vdB31 (BN)

DSS
© DSS II (blue) - 12×12'
Name: vdB31
Type: BN
Constellation: Aur
Coordinates: 04h55m45.85s / +30°33'04.3"
Brightness / Size: - / 9.0×4.0'
8" f/6, 96x, Bortle 4, SQM-L 21.0 FAILED

vdB37 (BN)

DSS
© DSS II (blue) - 5×5'
Name: vdB37
Type: BN, RN
Constellation: Ori
Coordinates: 05h18m04.00s / +13°25'04.0"
Brightness / Size: - / 2.0×2.0'
8" f/6, 80x, Bortle 5 FAILED

vdB143 (BN)

DSS
© DSS I - 5×5'
Name: vdB143
Type: BN, RN
Constellation: Cep
Coordinates: 21h36m57.00s / +68°11'07.0"
Brightness / Size: - / -
8" f/6, 100x, Bortle 4+
Directly around the 8.28m bright central star the nebula appeared as a faint glow. To the west (?) I could see a slightly curved extension.
MODERATE

vdB145 (BN)

DSS
© DSS II (blue) - 5×5'
Name: vdB145
Type: BN, RN
Constellation: Cyg
Coordinates: 21h43m37.00s / +48°53'02.0"
Brightness / Size: - / -
8" f/6, 100x, Bortle 5
Beside the 8.12m bright star two fainter stars, where I thought I saw some nebulosity. But not sure.
FAILED