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Galaxy Merger Visual Classification Scheme - 04/2022
Table by Gary Imm - See His Astrobin Website for Poster of Examples
Primary reference - 2016 Astrophysical Journal Paper by Larson et al
M1 - No Bridge, M2L – Long Bridge, M2S – Short Bridge, M3 – 2 Close Cores, M4 – 1 Core with Tails, M5 – 1 Core
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Merger ClassObjectNotesConstellationRADecTransit Date
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M1 - No BridgeArp 084"Heron", NGC5395, NGC5394CVn13h58m38s+37°25'30"05/11
4
M1 - No BridgeArp 091NGC5953Ser15h34m32s+15°11'00"06/05
5
M1 - No BridgeArp 121MCG-01-03-052Cet00h59m23s-04°48'00"10/25
6
M1 - No BridgeArp 148"Mayall's Object", collisional ring galaxyUMa11h03m52s+40°50'00"03/28
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M1 - No BridgeArp 298IC5283Peg23h03m18s+08°53'00"09/27
8
M1 - No BridgeArp 301UGC6204Leo11h09m51s+24°15'00"03/30
9
M1 - No BridgeArp 302MCG+04-35-018, 15' from Arp 177, UGC9618Boo14h57m00s+24°36'00"05/26
10
M1 - No BridgeArp 303IC563Sex09h46m20s+03°02'00"03/08
11
M1 - No BridgeM51"Whirlpool", NGC5194, Arp85, with NGC5195CVn13h29m52s+47°11'45"05/04
12
M1 - No BridgeNGC 2207CMa06h16m22s-21°22'22"01/14
13
M2L - Long BridgeArp 087"Ensnarer", NGC3808, 50' from Arp320Leo11h40m44s+22°25'00"04/06
14
M2L - Long BridgeArp 096PGC20066Cep07h03m22s+86°33'00"01/26
15
M2L - Long BridgeArp 097MCG+05-29-010UMa12h05m45s+31°04'00"04/13
16
M2L - Long BridgeArp 099NGC7549, Hickson 93, NGC 7550, close to Arp 170Peg23h15m17s+19°02'00"09/30
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M2L - Long BridgeArp 100IC18Cet00h28m38s-11°34'00"10/18
18
M2L - Long BridgeArp 101UGC10164Ser16h04m24s+14°46'00"06/12
19
M2L - Long BridgeArp 102MCG+08-31-042Her17h19m14s+48°59'00"07/01
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M2L - Long BridgeArp 103"Zwicky's Triplet", PGC059061Her16h49m26s+45°27'00"06/24
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M2L - Long BridgeArp 104"Keenan's System", "Galactic YoYo", NGC 5218 and NGC5216 UMa13h32m10s+62°46'03"05/05
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M2L - Long BridgeArp 151MRK0040, 40' from Arp 155UMa11h25m36s+54°22'00"04/03
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M2L - Long BridgeArp 173MCG+02-38-020Boo14h51m27s+09°19'00"05/25
24
M2L - Long BridgeArp 174NPM1G+29.0179Leo09h58m38s+28°52'00"03/12
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M2L - Long BridgeArp 190UGC2320Ari02h50m19s+12°53'00"11/23
26
M2L - Long BridgeArp 204MCG+14-06-025Cam13h22m49s+84°30'00"05/02
27
M2L - Long BridgeArp 248"Wild's Triplet", MCG-01-30-34Vir11h46m49s-03°49'00"04/08
28
M2L - Long BridgeArp 252ESO566-IG007 Hya09h44m58s-19°43'00"03/08
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M2L - Long BridgeArp 293NGC6286 & NGC 6285Dra16h58m31s+58°56'00"06/26
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M2L - Long BridgeArp 295Aqr23h42m04s-03°35'00"10/07
31
M2L - Long BridgeArp 296,MAC1128+5833 NGC 3690, with Arp 299UMa11h28m53s+58°33'00"04/03
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M2L - Long BridgeNGC 1154with NGC 1155Eri02h58m08s-10°21'49"11/25
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M2L - Long BridgeNGC 1568Eri04h24m21s-00°44'19"12/17
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M2L - Long BridgeNGC 4410tripletVir12h26m30s+09°01'09"04/18
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M2L - Long BridgeUGC 04703BCD, MCG+01-23-013, with NGC 2718Hya08h58m25s+06°20'05"02/24
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M2S - Short BridgeArp 083NGC3800Leo11h40m13s+15°20'00"04/06
37
M2S - Short BridgeArp 094NGC3226 with NGC3227 Leo10h23m27s+19°53'54"03/18
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M2S - Short BridgeArp 105"Ambartsumian's Knot", UGC6224, includes Abell 1185UMa11h11m12s+28°42'00"03/30
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M2S - Short BridgeArp 106NGC4211Com12h15m35s+28°10'00"04/15
40
M2S - Short BridgeArp 107
MCG+05-26-024, right of TYC 2519-2044-1, collisional ring galaxy
LMi10h52m18s+30°04'00"03/25
41
M2S - Short BridgeArp 140NGC275Cet00h51m04s-07°03'00"10/23
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M2S - Short BridgeArp 142"Penguin and Egg", NGC2937, NGC 2936, collisional ring galaxyHya09h37m45s+02°44'00"03/06
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M2S - Short BridgeArp 143NGC2444, collisional ring galaxyLyn07h46m53s+39°01'00"02/06
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M2S - Short BridgeArp 144NGC7829, with Arp 51Cet00h06m29s-13°25'00"10/12
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M2S - Short BridgeArp 149IC803Com12h39m42s+16°35'00"04/21
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M2S - Short BridgeArp 158NGC523, within 50' of Arp 229And01h25m19s+34°01'00"11/01
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M2S - Short BridgeArp 166NGC750 - 2 ellipticals with bridgeTri01h57m32s+33°12'00"11/09
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M2S - Short BridgeArp 167NGC2673Cnc08h49m24s+19°04'00"02/22
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M2S - Short BridgeArp 169NGC7236Peg22h14m45s+13°50'00"09/15
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M2S - Short BridgeArp 170Hickson 94, with Abell 2572, close to Arp99Peg23h17m15s+18°44'00"09/30
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M2S - Short BridgeArp 182MCG+01-59-081, Hickson 96, NGC 7674Peg23h27m59s+08°47'00"10/03
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M2S - Short BridgeArp 191MCG+03-28-063Leo11h07m20s+18°25'00"03/29
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M2S - Short BridgeArp 202NGC2719, include NGC 2724Lyn09h00m15s+35°43'00"02/25
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M2S - Short BridgeArp 208MCG+08-31-011Her16h51m01s+47°13'00"06/24
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M2S - Short BridgeArp 221MCG-02-25-006Hya09h36m27s-11°19'00"03/06
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M2S - Short BridgeArp 238MCG+10-19-056, UGC 8335UMa13h15m29s+62°07'00"04/30
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M2S - Short BridgeArp 239NGC 5278 and 5279UMa13h41m39s+55°40'00"05/07
58
M2S - Short BridgeArp 240Vir13h39m57s+00°49'00"05/07
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M2S - Short BridgeArp 241UGC9425, near NGC 5709Boo14h37m50s+30°28'00"05/21
60
M2S - Short BridgeArp 242"Mice", NGC4676Com12h46m10s+30°43'00"04/23
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M2S - Short BridgeArp 245NGC2992Hya09h45m42s-14°19'00"03/08
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M2S - Short BridgeArp 247IC2338Cnc08h23m32s+21°20'00"02/15
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M2S - Short BridgeArp 249UGC12891Peg00h00m19s+22°59'00"10/10
64
M2S - Short BridgeArp 253Sex09h43m24s-05°16'00"03/08
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M2S - Short BridgeArp 256MCG-02-01-052Cet00h18m50s-10°21'00"10/15
66
M2S - Short BridgeArp 257MCG+00-23-005Hya08h51m38s-02°21'00"02/22
67
M2S - Short BridgeArp 259Hickson 31Eri05h01m36s-04°15'00"12/26
68
M2S - Short BridgeArp 261MCG-02-38-017. PGC52935Lib14h49m32s-10°09'00"05/24
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M2S - Short BridgeArp 269"Cocoon", NGC 4490CVn12h30m36s+41°38'32"04/19
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M2S - Short BridgeArp 270NGC3396, with NGCD 3395LMi10h49m56s+32°59'00"03/25
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M2S - Short BridgeArp 271NGC5426 and NGC5427 Vir14h03m25s-06°01'00"05/13
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M2S - Short BridgeArp 273"Rose", UGC1813, collisional ring galaxyAnd02h21m32s+39°21'00"11/15
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M2S - Short BridgeArp 277NGC4809Vir12h54m50s+02°39'00"04/25
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M2S - Short BridgeArp 278NGC7253Peg22h19m26s+29°23'00"09/16
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M2S - Short BridgeArp 284NGC7714, collisional ring galaxyPsc23h36m14s+02°09'18"10/05
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M2S - Short BridgeArp 311IC1260, contains Arp 310Dra17h27m31s+58°28'00"07/03
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M2S - Short BridgeArp 312MCG+08-31-006Her16h49m50s+46°43'00"06/24
78
M2S - Short BridgeArp 315NGC2830Lyn09h19m41s+33°44'00"03/02
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M2S - Short BridgeArp 323PGC072810, Hickson 98Psc23h54m14s+00°21'00"10/10
80
M2S - Short BridgeHCG 90includes NGC7176PsA22h02m09s-31°59'25"09/11
81
M2S - Short BridgeIC 2431tripletCnc09h04m35s+14°35'41"02/26
82
M2S - Short BridgeNGC 0128with NGC127 Psc00h28m50s+02°50'20"10/18
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M2S - Short BridgeNGC 0317And00h57m40s+43°47'32"10/25
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M2S - Short BridgeNGC 1540Eri04h15m10s-28°28'46"12/14
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M2S - Short BridgeNGC 5591Boo14h22m34s+13°43'02"05/17
86
M2S - Short BridgeNGC 5759Boo14h47m15s+13°27'23"05/24
87
M2S - Short BridgeNGC 5765Vir14h50m51s+05°06'51"05/25
88
M2S - Short BridgeNGC 6338Dra17h15m23s+57°24'41"06/30
89
M2S - Short BridgeNGC 6377with NGC 6376Dra17h25m23s+58°49'21"07/03
90
M2S - Short BridgeNGC 6670Dra18h33m39s+59°53'17"07/20
91
M2S - Short BridgeNGC 7204PsA22h06m54s-31°03'00"09/13
92
M2S - Short BridgeNGC 7638with IC 1484 and 1485Peg23h22m33s+11°19'47"10/02
93
M2S - Short BridgeNGC 7769 with 7770, 7771 and 7771APeg23h51m04s+20°09'01"10/09
94
M2S - Short BridgePGC 03182MCG12-2-1A, IRAS506+7248Cas00h54m04s+73°05'03"10/24
95
M2S - Short BridgePGC 62946"Bird", ESO593-8, IRAS19115-2124Sgr19h14m32s-21°19'04"07/31
96
M2S - Short BridgeUGC 02489"Zwicky's Nonet", 9 galaxies, part of Abell 407Per03h01m44s+35°50'48"11/25
97
M2S - Short BridgeZW I 136LEDA 2387685 with LEDA 3087279 Her16h13m31s+51°03'39"06/15
98
M3 - 2 Close CoresArp 055"Grasshopper", UGC4881,Lyn09h16m00s+44°21'00"03/01
99
M3 - 2 Close CoresArp 075NGC702Cet01h51m18s-04°03'00"11/08
100
M3 - 2 Close CoresArp 081NGC6621 and 6622Dra18h13m00s+68°21'00"07/15