Leo Triplet
| Leo Triplet | |
|---|---|
| File:Leo-Triplet.png The Leo Triplet, with M65 (right top), M66 (right bottom) and NGC 3628 (left). North is to the left. | |
| Observation data (Epoch J2000) | |
| Constellation | Leo |
| Right ascension | 11h 17m[1][2] |
| Declination | +13° 25′[1][2] |
| Brightest member | M66[1][2] |
| Number of galaxies | 3-5[1][2][3] |
| Other designations | |
| M66 Group, Arp 317,[4] LGG 231,[1] NOGG P1 533,[2] NOGG P2 543[2] | |
The Leo Triplet (also known as the M66 Group) is a small group of galaxies about 35 million light-years away[5] in the constellation Leo. This galaxy group consists of the spiral galaxies M65, M66, and NGC 3628.
Members
[edit | edit source]The table below lists galaxies that have been consistently identified as group members in the Nearby Galaxies Catalog,[3] the Lyons Groups of Galaxies (LGG) Catalog,[1] and the group lists created from the Nearby Optical Galaxy sample of Giuricin et al.[2]
Member list
[edit | edit source]| Name | Type[6] | R.A. (J2000)[6] | Dec. (J2000)[6] | Redshift (km/s)[6] | Apparent Magnitude |
|---|---|---|---|---|---|
| M65 | SAB(rs)a | 11h 18m 56.0s | +13° 05′ 32″ | 807 ± 3 | 9.3[7] |
| M66 | SAB(s)b | 11h 20m 15.0s | +12° 59′ 30″ | 727 ± 3 | 8.9[8] |
| NGC 3628 | SAb pec | 11h 20m 17.0s | +13° 35′ 23″ | 843 ± 1 | 9.5[9] |
Additionally, some of the references cited above indicate that one or two other nearby galaxies may be group members. NGC 3593 is frequently but not consistently identified as a member of this group.
Nearby groups
[edit | edit source]The M96 Group is located physically near the Leo Triplet.[10] These two groups may actually be separate parts of a much larger group,[10] and some group identification algorithms actually identify the Leo Triplet as part of the M96 Group.[2][11]
See also
[edit | edit source]- NGC 5866 Group – another small group of galaxies
References
[edit | edit source]- ^ a b c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ VST Looks at the Leo Triplet — and Beyond
- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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External links
[edit | edit source]- The Leo Triplett (M66 group) at messier.seds.org
- The Leo Triplet on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- Finder chart at freestarcharts.com (PDF format)