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The M81 Group is a group of galaxies in Ursa Major, located around 12 mly away from our Milky Way Galaxy.
M81 Galaxy Group (distances in million light years) NGC 4236 - Spiral Galaxy (Caldwell 3) - 10.5 mly NGC 2403 - Spiral Galaxy (Caldwell 7) - 10.6 mly NGC 2366 - Irregular Galaxy - 11.1 mly M81 - Spiral Galaxy (Bode's Nebula) - 12.0 mly M82 - Spiral Galaxy - 12.0 mly IC 2574 - Spiral Galaxy (Coddington Nebula) - 12.4 mly NGC 3077 - Spiral Galaxy - 12.8 mly NGC 2976 - Spiral Galaxy - 14.8 mly More Information More Information
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NGC 4236 / Caldwell 3 (Draco) |
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| CCD Image (60% size reduction, Linear Scale) 3 x 90s sec exposure (average combine), 3x3 binning, C Filter 2009-04-08 22:31 h UT (#362085-89) 12" LX200R (at f/5.7) + ST-10XME |
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NGC 4236 - detail |
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| Negative CCD Image (60% size reduction) Image details as above |
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NGC 2403 / Caldwell 7 / Herschell V-44 (Camelopardalis) |
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| CCD Image (60% size reduction, Linear Scale) 5 x 90s sec exposure (average combine), 3x3 binning, C Filter 2009-04-08 22:31 h UT (#362064-68) 12" LX200R (at f/5.7) + ST-10XME |
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NGC 2403 - detail |
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| CCD Image (60% size reduction, Square Root Scale) Image details as above |
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| False colour CCD Image (60% size reduction, Log Scale) Image details as above |
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| False colour CCD Image (60% size reduction, Log Scale) Image details as above |
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NGC 2403 - colour images |
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| CCD Colour Image (RGB Combine, cropped to central area) 1 x 90s (Red), 1 x 90s (Green), 1 x 120s (Blue), 3x3 binning 2009-04-08 22:38 h UT (#362069-71) 12" LX200R (at f/5.7) + ST-10XME |
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| CCD Colour Image (LRGB combine, cropped to central area) 5 x 90s (Luminance, C), 1 x 90s (Red), 1 x 90s (Green), 1 x 120s (Blue), 3x3 binning 2009-04-08 22:38 h UT (#362069-71) 12" LX200R (at f/5.7) + ST-10XME |
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| CCD Colour Image (LRGB combine in AIP4WIN, cropped to central
area) 5 x 90s (Luminance, C), 1 x 90s (Red), 1 x 90s (Green), 1 x 120s (Blue), 3x3 binning, Luminance Gamma Adjusted 2009-04-08 22:38 h UT (#362069-71) 12" LX200R (at f/5.7) + ST-10XME |
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| NGC 2366 (Camelopardalis) |
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| CCD Image (Linear Scale, 50% size) 7 x 120 sec exposure (average combine), 3x3 binning, C Filter 2013-10-12 19:04hUT (#548001-07) 12" LX200R (at f/9.7) + ST-10XME |
| NGC 2366 - Detail The smaller galaxy to the lower left is NGC 2363 |
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| CCD Image (cropped) Image details as above |
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| M81 (Ursa Major) |
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| CCD Image (linear scale, 50% size) 90 sec exposure (single frame), 3x3 binning, C Filter 2009-03-10 01:29 h UT (#356259) 12" LX200R (at f/5.8) + ST-10XME |
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| CCD Image (square root scale, 50% size) Image details as left |
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| M82 (Ursa Major) |
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| CCD Image (Square root scaling, 55% size) 9 x 20s (median combine), 3x3 binning, C Filter 2009-03-10 01:40 h UT (#356266-74) 12" LX200R (at f/5.8) + ST-10XME [full size image] |
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| CCD Image (Square root scaling, cropped) Image details as above |
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| IC 2574 (Ursa Major) - an outlying member of the M81 group |
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| CCD Image 5 x 2 min exposure (median combine), 2x2 binning, C Filter 2006-05-04 01:35 h UT (#121197-201) |
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| NGC 3077 (Ursa Major) Note: the bright star to upper right of the galaxy is HIP 49230 (mag +7.9) NGC 3077 lies at distance of around 13 million light years (12.5-13.2 depending on method) |
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| CCD Image (50% size) 4 x 90s exposure (average combine), 3x3 binning, C Filter 2015-10-31 21:48 h UT (#591266-71) 12" LX200R (at f/10.4) + ST-10XME |
| NGC 3077 - Detail |
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| CCD Image (100% size, log-scale, cropped) Image details as above |
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| False Colour CCD Image (100% size, logscale, cropped) False Colour, Inverse Spectrum Image details as above |
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| NGC 2976 (Ursa Major) an outlying member of the M81 group |
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| CCD Image (cropped) 5 x 120 sec exposure (average combine), 3x3 binning, C Filter 2013-10-15 19:28 h UT (#549046-50) 12" LX200R (at f/9.7) + ST-10XME |
| NGC 2976 - wider view |
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| CCD Image (50% size) Image details as above |
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| Galaxy | RA | Dec | Group | Blue Mag | Type | Size kly | Mly |
| NGC 4236 | 12 16.8 | +69 28 | M81 | 10.05 | Sd | 70 | 10.5 |
| NGC 2403 | 07 36.8 | +65 36 | M81 | 8.93 | Sc | 70 | 10.6 |
| UGC4 305,HoII | 08 19.1 | +70 43 | M81 | 11.1 | Irr | 25 | 10.9 |
| NGC 2366 | 07 28.9 | +69 12 | M81 | 11.43 | Irr | 25 | 11.2 |
| M81,NGC 3031 | 09 55.6 | +69 04 | M81 | 7.89 | Sa | 90 | 12.0 |
| M82,NGC 3034 | 09 55.8 | +69 41 | M81 | 9.3 | Irr | 40 | 12.0 |
| NGC 3077 | 10 03.4 | +68 44 | M81 | 10.61 | Irr | 20 | 12.2 |
| IC 2574 | 10 28.4 | +68 25 | M81 | 10.8 | Irr | 50 | 12.4 |
| NGC 2976 | 09 47.3 | +67 55 | M81 | 10.82 | Sc | 25 | 14.8 |
Note: Green rows show galaxy group members that have been successfully imaged (white row have not yet been imaged).
Galaxy Name II RA (2000.0) Dec type m_v dim RV RV_hel NGC 2366 H III.748 07:28.9 +69:13 Ir+ 10.91 7.3x3.5 252 100 NGC 2403 H V.44 07:36.9 +65:36 Sc 8.39 17.8x11.0 259 131 M81 dw A PGC 23521 08:23.9 +71:02 I? 16.5: 1.3x0.7 262 113 Holm. II UGC 4305 08:18.9 +70:43 Ir+ 10.75 7.6x6.2 305 157 DDO 53 UGC 4459 08:34.1 +66:10 Ir+ 14.38p 1.7x1.3 144 19 Holm. I UGC 5139 09:40.5 +71:11 Ir+ 12.94 3.5x3.0 287 143 NGC 2976 H I.285 09:47.3 +67:55 Scp 10.15 4.9x2.5 175 3 M81 NGC 3031 09:55.6 +69:04 Sb 6.93 25.7x14.1 95 - 34 M82 NGC 3034 09:55.8 +69:41 Pec 8.41 11.2x4.6 388 203 Holm. IX UGC 5336 09:57.5 +69:03 Im 15.5 1.2x0.5 175 46 NGC 3077 H I.286 10:03.3 +68:44 E2p 9.85 4.6x3.6 148 50 M81 dw B UGC 5423 10:05.5 +70:22 Ir+ 14.94p 1.2x0.9 479 350 IC 2574 Codding. 10:28.4 +68:25 S+ 10.56 12.3x5.9 185 57A0952+69 Arp Loop 09:57.5 +69:17 Im 16.08 K52 K73 BK3N PGC 28529 09:53.8 +68:59 Im 17.1 0.5 - 40 Garland PGC 29167 10:03.9 +68:40 Im 50 DDO 82 UGC 5692 10:30.6 +70:37 Sm: 13.47 3.2x1.8 347 180The following galaxies, around NGC 4236, lie nearby and at roughly the same distance, so may either be outlying members of the M81 group, or form a small nearby group of their own:UGC 6456 VII Zw403 11:28.0 +79:00 Pec 13.7 1.5x0.9 NGC 4236 H V.51 12:16.7 +69:28 SB+ 9.66 18.6x6.9 160 DDO 165 UGC 8201 13:06.3 +67:42 Ir+ 12.68p 3.2x2.2 201
M81 Galaxy Group [ http://seds.org/messier/more/m081gr]
Map - The Nearest Groups of Galaxies [http://www.atlasoftheuniverse.com/galgrps.html]
List of Nearby Galaxy Groups [http://www.atlasoftheuniverse.com/galaclus.html]
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| This Web Page: | M81 Galaxy Group |
| Last Updated : | 2015-11-05 |
| Site Owner : | David Richards |
| Home Page : | David's Astronomy Web Site |
