- Sketches (Deepsky) (Leo) -

And (1) Cas (5) Cyg (7) Her (4) Lyr (5) Sex (1)
Aur (4) Cnc (4) Dra (5) Leo (12) Ori (2) Tau (1)
Boo (2) Com (2) Eri (1) LMi (3) Per (6) Tri (1)
Cam (4) CVn (7) Gem (8) Lyn (9) Psc (1) UMa (10)

M 65 (GLX)

../dss/dss2blue_111855.96_+130531.96_9_web.jpg
Image source: DSS II (blue) - 9×9'
Name: M65, NGC3623, UGC6328
Group: Arp317, M66 Group, Leo Triplet
Type: GLX
Constellation: Leo
Coordinates: 11h18m55.96s / +13°05'31.96"
Brightness / Size: 9m2 / 8.7x2.5'
Robert Zebahl
B 8x40, Bortle 6, NELM 5m5, SQM-L 19.2

FAILED
4.5" f/8, 28x, Bortle 7+
Fairly thin, elongated, nearly evenly bright. Barely seen with direct vision. At 100x the core is brighter and seems also slightly elongated.

EASY
B 16x70, Bortle 6-, SQM-L 19.0, Seeing 3/5
Conditions in the target region: SQM-L 18.5
Fainter and especially smaller than Messier 66. Uniform, elongated nebula.

MODERATE
120mm f/5, 46x, Bortle 6, SQM-L 19.3
Thin, elongated with slightly elongated, brighter center. Located on the bottom left of the sketch.

../sketches/2019-02-25_leo_triplet.jpg

EASY
152mm f/8, 30x, Bortle 4, SQM-L 21.1
Clearly elongated with brighter, elongated central region.

EASY
8" f/6, 37x, Bortle 4
Very elongated with brighter, compact core.

EASY
René Merting
B 8x30, SQM-L 21.5
indirekt als leicht länglicher Nebel erkennbar - schwächer und schmaler als die benachbarte M 66

MODERATE
B 10x50, SQM-L 21.5
Bedingungen in der Zielregion: SQM-L 20.5
direkt sichtbar, leicht nordsüdlich elongiert

EASY
B 16x70, SQM-L 21.5
matt, homogen hell und länglich - länglicher als M 66

EASY
B 18x70, SQM-L 21.5
halb so groß wie M 66 im Osten - M 65 hat auch ein relativ helles Zentrum

EASY
100mm f/6.4, 71x, SQM-L 21.5
bei 20x schmaler und schwächer sichtbar als die benachbarte M 66 - NS-Elongation - bei 71x wirkt die Galaxie ausgedehnter als M 66 und ist indirekt noch gut sichtbar
EASY

M 66 (GLX)

../dss/dss2blue_112015.03_+125928.64_10_web.jpg
Image source: DSS II (blue) - 10×10'
Name: M66, NGC3627, UGC6346, Arp16
Group: Arp317, M66 Group, Leo Triplet
Type: GLX
Constellation: Leo
Coordinates: 11h20m15.03s / +12°59'28.64"
Brightness / Size: 8m9 / 9.3x4.2'
Forms together with M65 & NGC3628 the Leo Triplet (Arp317).

Robert Zebahl
B 8x40, Bortle 6, NELM 5m5, SQM-L 19.2
Oval, faint and anything but evident.

MODERATE
B 8x40, Bortle 4, NELM 6m0+, SQM-L 21.0
Well visible with averted vision, oval, evenly bright. Messier 66 was about 30° degrees above the horizon.

MODERATE
B 16x70, Bortle 6-, SQM-L 19.0, Seeing 3/5
Conditions in the target region: SQM-L 18.5
Quite faint, oval, without noticeable condensation, moderately conspicuous. Right next to a fainter field star.

MODERATE
4.5" f/8, 28x, Bortle 7+
A bit brighter than M65, oval with brighter core. Some apparent field stars at the edge of the galaxy. At 100x the oval core is evident.

EASY
120mm f/5, 46x, Bortle 6, SQM-L 19.3
Oval with much brighter, slightly oval center. Located on the bottom right of the sketch.

../sketches/2019-02-25_leo_triplet.jpg

EASY
152mm f/8, 30x, Bortle 4, SQM-L 21.1
Oval with bright, slightly elongated core area, which is slightly shifted to the west.

EASY
8" f/6, 37x, Bortle 4
Oval with distinct, bright and also oval core area.

EASY
René Merting
B 8x30, SQM-L 21.5
direkt als elliptischer Nebel erkennbar, Nord-Süd-Elongation - breiter als M 65

EASY
B 10x50, SQM-L 21.5
Bedingungen in der Zielregion: SQM-L 20.5
die Galaxie direkt sehr auffällig, sehr groß und leicht SO-NW-elongiert

EASY
B 16x70, SQM-L 21.5
homogen hell und leicht länglich - unmittelbar nordwestlich von der Galaxie fällt ein Stern auf

EASY
B 18x70, SQM-L 21.5
groß und hell, von Nord nach Süd elongiert - zum Zentrum leicht heller, wobei die Galaxie im südlichen Bereich generell ein wenig heller wirkt

EASY
100mm f/6.4, 71x, SQM-L 21.5
bei 20x mit leichter NS-Elongation erkennbar - stellares Zentrum - leichte Helligkeitsunterschiede - bei 71x wirkt die Galaxie, als ob sie sich um den hellen Stern im NW winden möchte
EASY

NGC 2903 (GLX)

../dss/dss2blue_093210.11_+213002.99_13_web.jpg
Image source: DSS II (blue) - 13×13'
Name: NGC2903, UGC5079, H1.56
Type: GLX
Constellation: Leo
Coordinates: 09h32m10.11s / +21°30'02.99"
Brightness / Size: 9m0 / 12.6x5.6'
Robert Zebahl
70mm f/5.7, 15x, Bortle 6-, NELM 5m0, SQM-L 18.8
Slightly elongated, very faint, evenly bright.

MODERATE
80mm f/6.25, 25x, Bortle 6
Obviously oval, evenly bright, fairly faint. Evident with averted vision.

EASY
4.5" f/8, 36x, Bortle 5
Oval, brightening toward the middle. Seen with direct vision.

EASY
70mm f/5.7, 31x, Bortle 6, SQM-L 19.3
Barely visible with direct vision.

../sketches/2019-02-27_ngc2903.jpg

EASY
8" f/6, 37x, Bortle 4
Obviously oval shape. Core elongated and brighter. Darkening toward the edge.

EASY
René Merting
B 10x50, SQM-L 21.5
indirekt leicht erkennbar - ein großflächiger matter Nebelfleck, homogen hell und nicht ganz rund - in guten Momenten ist eine leichte Elongation erkennbar

MODERATE
B 18x70, SQM-L 21.5
sehr auffällig - groß, gut begrenzt und leicht NO-SW-elongiert - indirekt besehen leichter Helligkeitsanstieg zum Zentrum hin

EASY
100mm f/6.4, 64x, SQM-L 21.5
bei 32x ein großer elliptischer Nebelfleck, Ausdehnung 3:1 - längliches Zentrum - bei 64x wird die Galaxie breiter in der Ansicht ähnlich einem Pinselstrich mit Photoshop, bei dem im Zentrum nochmal ein schmalerer Pinselstrich drüber gezeichnet wurde
EASY

NGC 3226 (GLX)

../dss/dss2blue_102327.01_+195354.38_5_web.jpg
Image source: DSS II (blue) - 5×5'
Name: NGC3226, UGC5617, H2.28
Group: Arp94
Type: GLX
Constellation: Leo
Coordinates: 10h23m27.01s / +19°53'54.38"
Brightness / Size: 11m4 / 2.5x2.2'
Robert Zebahl
120mm f/5, 85x, Bortle 6-, SQM-L 19.1
Pretty faint, round, slightly condensed.

../sketches/2018-04-10_arp94.jpg

MODERATE
8" f/6, 133x, Bortle 6, SQM-L 19.5
At 30x together with NGC3227 already visible as very faint, elongated brightening. At 133x roundish, well condensed with a quite compact center. Overall brighter than NGC3227.

../sketches/2019-03-07_arp94.jpg

EASY
8" f/6, 37x, Bortle 4
Fairly well separated from nearby NGC3227. Roundish shape with fairly bright, compact core.

EASY
René Merting
B 10x50, SQM-L 21.5
leider nein

FAILED
100mm f/6.4, 64x, SQM-L 21.5
bei 32x indirekt leicht länglich zusammen mit NGC 3227 zu erkennen - bei 64x sind in dem länglichen Nebel zwei Kondensationen wahrnehmbar, NGC 3226 nördlich ist schwächer und kleiner, der Nebelklecks wirkt aber etwas breiter in der OW-Ausdehnung

EASY
12.5" f/4.5, 144x, SQM-L 21.5
bei 72x als heller gut von NGC 3227 getrennter Nebelfleck erkennbar - NGC 3226 ist rund bis leicht oval und hat ein quasistellares Zentrum - bei 144x wirkt NGC 3226 deutlich kleiner als die südliche Nachbargalaxie und sie hat ein viel schwächeres Zentrum
EASY

NGC 3227 (GLX)

../dss/dss2blue_102330.57_+195154.30_7_web.jpg
Image source: DSS II (blue) - 7×7'
Name: NGC3227, UGC5620, H2.29
Group: Arp94, NGC3227 Group, Leo II Group
Type: GLX, SY1
Constellation: Leo
Coordinates: 10h23m30.57s / +19°51'54.30"
Brightness / Size: 10m3 / 6.2x4.5'
Robert Zebahl
120mm f/5, 85x, Bortle 6-, SQM-L 19.1
Very faint, oval, evenly bright.

../sketches/2018-04-10_arp94.jpg

DIFFICULT
8" f/6, 133x, Bortle 6, SQM-L 19.5
At 30x together with NGC3226 already visible as very faint, elongated brightening. At 133x slightly elongated, getting slightly brighter towards the middle. North of the center a stellar brightening was visible.

../sketches/2019-03-07_arp94.jpg

EASY
8" f/6, 37x, Bortle 4
Fairly well separated from nearby NGC3226. Obviously oval with very bright, nearly stellar core.

EASY
René Merting
B 10x50, SQM-L 21.5
keine Chance

FAILED
B 18x70, SQM-L 21.5
indirekt ist eine kleine kompakte Aufhellung erkennbar, die ab und an immer wieder aufblitzt - ob NGC 3226 auch oder getrennt zu sehen war, vermag ich nicht zu sagen

DIFFICULT
100mm f/6.4, 64x, SQM-L 21.5
bei 32x indirekt leicht länglich zusammen mit NGC 3226 zu erkennen - bei 64x sind in dem länglichen Nebel zwei Kondensationen wahrnehmbar, NGC 3227 südlich ist heller und größer

EASY
12.5" f/4.5, 144x, SQM-L 21.5
bei 72x als heller gut von NGC 3226 getrennter Nebelfleck erkennbar - NGC 3227 mit nordsüdlicher Elongation und quasistellarem Zentrum - bei 144x wirkt NGC 3227 deutlich größer als die nördliche Nachbargalaxie
EASY

NGC 3628 (GLX)

../dss/dss2blue_112017.02_+133522.16_14_web.jpg
Image source: DSS II (blue) - 14×14'
Name: NGC3628, UGC6350, H5.8
Group: Arp317, M66 Group, Leo Triplet
Type: GLX
Constellation: Leo
Coordinates: 11h20m17.02s / +13°35'22.16"
Brightness / Size: 9m5 / 13.1x3.1'
Robert Zebahl
4.5" f/8, 75x, Bortle 7+
Already seen at 28x as very faint nebula. At 75x fairly well seen with averted vision, faint, evenly bright, very elongated.

MODERATE
4.5" f/8, 75x, Bortle 4, NELM 6m0
Elongated, without distinct core, slight darkening toward the edge. With averted vision I think I saw in one moment the dust lane, but not for sure. Due to nearby street lamps I wasn't able to get fully dark-adapted.

EASY
120mm f/5, 46x, Bortle 6, SQM-L 19.3
Pretty faint, elongated, evenly bright. Located on the upper right of the sketch.

../sketches/2019-02-25_leo_triplet.jpg

MODERATE
152mm f/8, 30x, Bortle 4, SQM-L 21.1
At 30x quite conspicuous, clearly elongated, getting slightly brighter towards the middle with a rather diffuse edge. At 66x the dust lane is very well visible with averted vision, which crosses the galaxy diagonally. Worthwhile!

EASY
8" f/6, 37x, Bortle 4
At 37x obviously elongated, evenly bright, moderately faint. At 100x dust lane seen with averted vision, which runs slightly diagonal. A wonderful view!

EASY
René Merting
B 10x50, SQM-L 21.5
Bedingungen in der Zielregion: SQM-L 20.5
keine Chance, ein anderes mal unter besseren Bedingungen vielleicht

FAILED
B 16x70, SQM-L 21.5
indirekt ein matter recht langer Schimmer, länger als M 65 - etwas mehr Helligkeit im Westen der Galaxie

MODERATE
B 18x70, SQM-L 21.5
ein mäßig gut definierter homogen heller Nebelstrich - Ausdehnung 4:1

MODERATE
100mm f/6.4, 71x, SQM-L 21.5
bei 24x ist die Galaxie indirekt als OW-elongierte Aufhellung sichtbar - bei 49x bleibt sie weiter nur indirekt sichtbar, die Nordkante wirkt definierter und heller - bei 71x wird die Galaxie schon schwächer, so dass sie kaum noch sichtbar ist
MODERATE

S 617 (**)

Name: S617
Type: **
Constellation: Leo
Coordinates: 10h53m24.96s / -02°15'18.80"

Components:
m1 m2 ρ θ Year
6m2 8m7 35.2" 179° 2017
Robert Zebahl
70mm f/5.7, 22x, Seeing 3-4/5
2020-03-31: Clearly separated with distinct difference in brightness. Color wise unremarkable. Nearby there is a brighter star.

../sketches/2020-03-31_s617.jpg

STF 1424 (**)

Name: STF1424, gamma Leo, 41 Leo, Algieba
Type: **
Constellation: Leo
Coordinates: 10h19m58.35s / +19°50'29.40"

Components:
m1 m2 ρ θ Year
AB 2m4 3m6 4.9" 126° 2019

../images/binary-star-orbits/STF1424-AB-orbit-solution-1.jpg ../images/binary-star-orbits/STF1424-AB-orbit-solution-2.jpg

Robert Zebahl
55mm f/9.1, 38x, Bortle 6-, SQM-L 19.1
At 38x split, but very tight with noticeable difference in brightness. At 56x and higher beautiful view of both components, which seemed to have similar colors.

../sketches/2019-02-09_gamma_leo.jpg

55mm f/9.1, 59x, Bortle 6, SQM-L 19.5
Very nice unequal double. A appeared yellow-orange, B rather white-bluish.

../sketches/2019-03-09_gamma_leo.jpg

70mm f/5.7, 100x, Bortle 6-
At 67x still a relatively close pair, but well separated with quite a clear difference in brightness. At 100x easy to separate and visible color difference: A yellowish to slightly orange, B white-yellowish.

102mm f/11, 125x, Bortle 7, SQM-L 18.8, Seeing 3/5
Very nicely separated with wonderful contrast in brightness and color. Primary component slightly orange, companion yellowish.

120mm f/5, 66x, Bortle 6-, SQM-L 19.1
At 48x easily seen as double star. It appeared as '8'. At 66x pretty tight with visible difference in brightness.

STF 1536 (**)

Name: STF1536, iota Leo, 78 Leo
Type: **
Constellation: Leo
Coordinates: 11h23m55.37s / +10°31'46.90"

Components:
m1 m2 ρ θ Year
AB 4m1 6m7 2.2" 96° 2018
AB-C 4m1 11m1 332.1" 346° 2015

../images/binary-star-orbits/STF1536-AB-orbit.jpg

Robert Zebahl
70mm f/5.7, 133x, Bortle 6, SQM-L 19.1, Seeing 4/5
AB: 2020-03-28: The companion was well visible as brightening on the diffraction ring of the primary component. Sketch see observation with my 102mm refractor.

102mm f/11, 125x, Bortle 6, SQM-L 19.1, Seeing 4/5
AB: 2020-03-28: At 125x clearly separated. A very beautiful sight! The companion was visible as almost round brightening close to the first diffraction ring of the primary component. The diffraction ring itself appeared very fine. At 224x also a very nice sight with a clear diffraction ring and the companion, which now appeared roundish.

../sketches/2020-03-28_iota_leo_stf1536.jpg

STF 1540 (**)

Name: STF1540, 83 Leo
Type: **
Constellation: Leo
Coordinates: 11h26m45.32s / +03°00'47.20"

Components:
m1 m2 ρ θ Year
AB 6m5 7m5 28.4" 150° 2018
Robert Zebahl
B 16x70, Bortle 6-, SQM-L 19.0, Seeing 3/5
2021-03-02: Splendid sight together with the double star tau Leo as well as 82 Leo. Beautiful star field. 83 Leo very nicely separated with moderate difference in brightness. Yellowish orange & slightly orange.

55mm f/9.1, 16x, Bortle 6, SQM-L 19.5
Wonderful double with slight color contrast in a very nice field. Together with tau Leo stunning view. Slightly unequal. A appeared white-yellowish, B rather grey-bluish.

../sketches/2019-03-09_83_leo_tau_leo.jpg

STF 1552 (**)

Name: STF1552, 90 Leo
Type: **
Constellation: Leo
Coordinates: 11h34m42.50s / +16°47'48.90"

Components:
m1 m2 ρ θ Year
AC 6m3 9m8 63.4" 235° 2018
AB 6m3 7m3 3.1" 209° 2018
Robert Zebahl
55mm f/9.1, 42x, Bortle 6, SQM-L 19.5
AB: A and B very tight and unequal. Much fainter component C very wide apart. All components almost in line. Very nice view.

../sketches/2019-03-09_90_leo.jpg

STFA 19 (**)

Name: STFA19, 84 Leo, tau Leo
Type: **
Constellation: Leo
Coordinates: 11h27m56.23s / +02°51'22.50"

Components:
m1 m2 ρ θ Year
AB 5m0 7m5 89.2" 181° 2019
Robert Zebahl
B 16x70, Bortle 6-, SQM-L 19.0, Seeing 3/5
2021-03-02: Splendid sight together with the double star 83 Leo as well as 82 Leo. Beautiful star field. Tau Leo beautifully separated with significant difference in brightness. Yellowish & bluish.

55mm f/9.1, 16x, Bortle 6, SQM-L 19.5
Wonderful double with slight color contrast in a very nice field. Together with 83 Leo stunning view. Noticeable unequal. A appeared white-yellowish with a hint of orange, B grey-bluish.

../sketches/2019-03-09_83_leo_tau_leo.jpg