M74 Group
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| M74 Group | |
 Messier 74, the brightest member of the M74 Group. Credit: NASA/ESA/GMOS/HST |
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| Observation data (Epoch J2000) | |
|---|---|
| Constellation(s) | Pisces |
| Right ascension | 01h 43m[1][2] |
| Declination | +14° 22′[1][2] |
| Number of galaxies | 5-7[3][1][2] |
| Brightest member | Messier 74[2] |
| Other designations | |
| NGC 628 Group, LGG 29[1], NOGG H 94[2], NOGG P1 84[2], NOGG P2 87[2] |
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| See also: Galaxy groups and clusters, List of galaxy clusters | |
The M74 Group (also known as the NGC 628 Group) is a small group of galaxies in the constellation Pisces. The face-on spiral galaxy M74 (NGC 628) is the brightest galaxy within the group. Other members include the peculiar spiral galaxy NGC 660 and several smaller irregular galaxies [3][1][2].
[edit] Members
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 three group lists created from the Nearby Optical Galaxy sample of Giuricin et al.[2].
| Name | Type[4] | R.A. (J2000)[4] | Dec. (J2000)[4] | Redshift (km/s)[4] | Apparent Magnitude[4] |
|---|---|---|---|---|---|
| Messier 74 | SA(s)c | 01h 36m 41.8s | +15° 47′ 01″ | 657 | 10.0 |
| NGC 660 | SB(s)a pec | 01h 43m 02.4s | +13° 38′ 42″ | 850 | 19.0 |
| UGC 1176 | Im | 01h 40m 09.9s | +15° 54′ 17″ | 630 | 14.4 |
| UGC 1195 | Sc | 01h 42m 27.0s | +13° 58′ 37″ | 774 | 13.9 |
| UGC 1200 | IBm | 01h 42m 48.3s | +13° 09′ 22″ | 808 | 14.0 |
Other possible members galaxies (galaxies listed in only one or two of the lists from the above references) include the irregular galaxies UGC 891, UGC 1104, UGC 1171, UGC 1175, and UGCA 20.
[edit] References
- ^ a b c d e f A. Garcia (1993). "General study of group membership. II - Determination of nearby groups". Astronomy and Astrophysics Supplement 100: 47–90.
- ^ a b c d e f g h i G. Giuricin, C. Marinoni, L. Ceriani, A. Pisani (2000). "Nearby Optical Galaxies: Selection of the Sample and Identification of Groups". Astrophysical Journal 543: 178–194. doi:.
- ^ a b c R. B. Tully (1988). Nearby Galaxies Catalog. Cambridge: Cambridge University Press. ISBN 0-521-35299-1.
- ^ a b c d e NASA/IPAC Extragalactic Database. Results for various galaxies. Retrieved on 2006-09-16.
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