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Last update: 2017-11-29

VdS FG

- Galaxies of the Arp Catalogue (Leo) -

And (4) Cep (3) CVn (5) Lep (1) Peg (11) Tri (1)
Ari (3) Cet (1) Dra (1) LMi (3) Per (1) UMa (16)
Boo (1) Cnc (1) Gem (1) Lyn (2) Psc (5) UMi (1)
Cam (3) Com (3) Leo (10) Ori (1) Ser (2) Vir (6)

Arp 5 (GLX)

DSS
© DSS II (blue) - 5×5'
Name: NGC3664, UGC6419, Arp5
Group: NGC3640 Group, Leo II Group
Type: GLX
Constellation: Leo
Coordinates: 11h24m24.26s / +03°19'29.95"
Brightness / Size: v12.6 mag / 2.0x1.9'
8" f/6, 133x, Bortle 4
Tried without success at 96x & 133x. I was too tired.
FAILED

Arp 16 (GLX)

DSS
© 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: v8.9 mag / 9.3x4.2'
Forms together with M65 & NGC3628 the Leo Triplet (Arp317).

B 40mm, 8x, Bortle 6, NELM 5.5, SQM-L 19.2
Oval, faint and anything but evident.

MODERATE
B 40mm, 8x, Bortle 4, NELM 6.0+, SQM-L 21.0
Well visible with averted vision, oval, evenly bright. Messier 66 was about 30° degrees above the horizon.

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

Arp 87 (GLXGRP)

DSS
© DSS II (blue) - 5×5'
Name: Arp87
Type: GLXGRP
Constellation: Leo
Coordinates: 11h40m44.50s / +22°26'20.00"

Group Members:
MCG+4-28-20 (PGC36228) b15.0 mag 0.5x0.2' (55°)
NGC3808 (UGC6643, H3.338) v13.4 mag 1.6x0.9' (123°)
8" f/6, 150x, Bortle 3, SQM-L 21.4
SQM-L 21.0: I only observed the brighter NGC3808. It appeared as pretty faint, small brightening.
MODERATE

Arp 94 (GLXGRP)

DSS
© DSS II (red) - 10×10'
Name: Arp94
Type: GLXGRP
Constellation: Leo
Coordinates: 10h23m30.00s / +19°52'30.00"

Group Members:
NGC3226 (UGC5617, H2.28) v11.4 mag 2.5x2.2' (25°)
NGC3227 (UGC5620, H2.29) v10.3 mag 6.2x4.5' (153°)
8" f/6, 37x, Bortle 4
Both galaxies are quite well separated at low magnification. The more compact NGC3226 appeared roundish with fairly bright, compact core. NGC3227 appeared oval with brighter, nearly stellar center.
EASY

Arp 232 (GLX)

DSS
© DSS II (blue) - 5×5'
Name: NGC2911, UGC5092, Arp232, H2.40
Type: GLX
Constellation: Leo
Coordinates: 09h33m46.10s / +10°09'09.33"
Brightness / Size: v11.5 mag / 4.0x3.1'
8" f/6, 100x, Bortle 4, NELM 6.0, SQM-L 21.0
SQM-L 20.6: Faint, relatively large with extended & well defined core area, otherwise more evenly bright.
MODERATE

Arp 301 (GLXGRP)

DSS
© DSS II (blue) - 5×5'
Name: Arp301
Type: GLXGRP
Constellation: Leo
Coordinates: 11h09m54.00s / +24°15'40.00"

Group Members:
UGC6204 b14.5 mag 1.0x0.5' (177°)
UGC6207 b14.6 mag 1.5x0.3' (64°)
8" f/6, 150x, Bortle 3, SQM-L 21.4
SQM-L 21.0: Only the brighter UGC6204 was visible, which appeared pretty faint, roundish and barely condensed. UGC6207 was also not visible at 220x. But I was already pretty cold ;-)
MODERATE

Arp 307 (GLXGRP)

DSS
© DSS II (blue) - 8×8'
Name: Arp307
Type: GLXGRP
Constellation: Leo
Coordinates: 09h25m45.00s / +11°26'30.00"

Group Members:
NGC2872 (UGC5018, H2.57, H2.546) v11.9 mag 1.8x1.7'
NGC2873 (PGC26742) v15.4 mag 0.7x0.2' (125°)
NGC2874 (UGC5021, H2.58, H2.547) v12.5 mag 2.2x0.7' (43°)
Possibly these galaxies are not interacting.

8" f/6, 80x, Bortle 4, NELM 6.0, SQM-L 21.0
SQM-L 20.6 in the target region.

NGC2872: More apparent than the nearby NGC2874, round, slight brightening toward the middle.

NGC2873: Not tried of course ;-)

NGC2874: Well separated from the nearby NGC2872, oval, evenly bright. Evident with averted vision.
EASY

Arp 316 (GLXGRP)

DSS
© DSS II (blue) - 15×15'
Name: Arp316
Type: GLXGRP
Constellation: Leo
Coordinates: 10h18m05.00s / +21°52'00.00"

Group Members:
NGC3187 (UGC5556) v12.9 mag 3.6x1.7' (115°)
NGC3189 (NGC3190, UGC5559, H2.44) v11.2 mag 4.5x1.5' (118°)
NGC3193 (UGC5562, H2.45) v10.9 mag 2.9x2.8' (20°)
Very bright Arp group. Together with NGC3185 also known as Hickson 44. Worthwhile!

4.5" f/8, 75x, Bortle 7+
Only the two brightest members were visible. Both fairly well seen with averted vision. NGC3193 appeared roundish with brighter core, NGC3189 very elongated and nearly evenly bright, whereas only the brighter core was visible.

MODERATE
4.5" f/8, 75x, Bortle 4, NELM 6.0
The two brightest members were apparent with averted vision: NGC3193 appeared roundish with brighter core, NGC3189 very elongated with also elongated, brighter core and fainter, diffuse outer region.

EASY
8" f/6, 100x, Bortle 4
At 37x the two brightest members are clearly evident. NGC3179 is very elongated and shows at 100x an elongated, distinctly brighter core area. Dust lane wasn't seen, but galaxy appeared more sharply defined SW. NGC3193 is round with very bright, compact core. Much more difficult is NGC3187: Only at third attempt I was able to see it. At 171x very faint, very elongated, thin, evenly bright. Barely held with averted vision.
EASY

Arp 317 (GLXGRP)

DSS
© DSS II (blue) - 60×60'
Name: Arp317, Leo Triplet
Type: GLXGRP
Constellation: Leo
Coordinates: 11h19m50.00s / +13°18'00.00"

Group Members:
M65 (NGC3623, UGC6328) v9.2 mag 8.7x2.5' (174°)
M66 (NGC3627, UGC6346, Arp16) v8.9 mag 9.3x4.2' (173°)
NGC3628 (UGC6350, H5.8) v9.5 mag 13.1x3.1' (104°)
4.5" f/8, 28x, Bortle 7+
M65: Fairly thin, elongated, nearly evenly bright. Barely seen with direct vision. At 100x the core is brighter and seems also slightly elongated.

M66: 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.

NGC3628: Already seen at 28x as very faint nebula. At 75x fairly well seen with averted vision, faint, evenly bright, very elongated.

EASY
4.5" f/8, 75x, Bortle 4, NELM 6.0
I mainly focused on NGC3628, but M65 & M66 were very easily seen of course. NGC3628 appeared 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
8" f/6, 37x, Bortle 4
M65: Very elongated with brighter, compact core.

M66: Oval with distinct, bright and also oval core area.

NGC3628: At 37x obviously elongated, evenly bright, moderately faint. At 100x dust lane seen with averted vision, which runs slightly diagonal. A wonderful view!
EASY

Arp 320 (GLXGRP)

DSS
© DSS II (blue) - 8×8'
Name: HCG57, Arp320, Copeland's Septet
Type: GLXGRP
Constellation: Leo
Coordinates: 11h37m51.00s / +21°59'00.00"

Group Members:
NGC3745 b16.4 mag 0.6x0.4' (110°)
NGC3746 (UGC6597) b15.3 mag 1.1x0.5' (125°)
NGC3748 v14.8 mag 0.7x0.4' (140°)
NGC3750 v13.9 mag 0.8x0.7' (160°)
NGC3751 v14.3 mag 0.8x0.5' (5°)
NGC3753 (UGC6602) v13.6 mag 1.7x0.5' (120°)
NGC3754 b15.2 mag 0.4x0.3' (35°)
PGC36010 b17.4 mag 0.4x0.3' (20°)
8" f/6, 200x, Bortle 4, SQM-L 21.2
SQM-L in the target region about 21.0.

NGC3746: Roundish (?), faint. Brighter and larger than NGC3748.

NGC3748: Faint, roundish, pretty small.

NGC3750: Located southwest of NGC3753. Difficult to separate from brighter NGC3753. Just visible as very faint, roundish brightening. Held with averted vision.

NGC3751: Most southern member of the group. Unfortunately for some reason I didn't tried this one.

NGC3753: Slightly elongated, rather evenly bright, pretty faint. Brightest and largest member of the group.

NGC3754: Northeast close to NGC3753. At 220x & 220x absolutely nothing was seen.

MODERATE
16" f/4.5, 225x, Bortle 4, SQM-L 21.2
SQM-L in the target region about 21.0.

NGC3745: Round, compact brightening. Anything but evident at 225x.

NGC3746: Evident, slightly oval, getting a bit brighter towards the middle. Still visible with direct vision.

NGC3748: Small, round brightening. Well seen with averted vision.

NGC3750: Roundish, condensed brightening. Almost visible with direct vision.

NGC3751: Most southern member of the group. Unfortunately for some reason I didn't tried this one.

NGC3753: Obviously oval/slightly elongated, getting brighter towards the middle. Still visible with direct vision.

NGC3754: Ziemlich schwache, rundliche Aufhellung dicht an NGC3753.
EASY