UGC 12591
UGC 12591 is the second most massive known spiral galaxy, after ISOHDFS 27. It is located about 400 million light years away from the Earth in the constellation Pegasus. In addition, it is the spiral galaxy with the highest known rotational speed[3] of about 500 km/s, almost twice that of our galaxy, the Milky Way.
| UGC 12591 | |
|---|---|
 UGC 12591, taken by Hubble | |
| Observation data (J2000 epoch) | |
| Constellation | Pegasus |
| Right ascension | 23h 25m 21.7s[1] |
| Declination | ±00° 00′ 00″[1] |
| Redshift | 0.023179[2] |
| Helio radial velocity | 6949 ± 10[2] |
| Distance | 394.26 ± 133.84 Mly (120.880 ± 41.036 Mpc)[2] |
| Apparent magnitude (B) | 13.90[2] |
| Characteristics | |
| Type | S0/a[2] |
| Mass | 1.9×1012[3] M☉ |
| Apparent size (V) | 1.7′ × 0.7′[2] |
| Other designations | |
| MGC+05-55-015, PGC 71392 | |
The galaxy has a mass estimated at 4 times that of the Milky Way,[4] making it the second of the most massive spiral galaxies known to date.
References
- Myers, S. T.; Jackson, N. J.; Browne, I. W. A.; De Bruyn, A. G.; Pearson, T. J.; Readhead, A. C. S.; Wilkinson, P. N.; Biggs, A. D.; Blandford, R. D.; Fassnacht, C. D.; Koopmans, L. V. E.; Marlow, D. R.; McKean, J. P.; Norbury, M. A.; Phillips, P. M.; Rusin, D.; Shepherd, M. C.; Sykes, C. M. (2003). "The Cosmic Lens All-Sky Survey - I. Source selection and observations". Monthly Notices of the Royal Astronomical Society. 341: 1. arXiv:astro-ph/0211073. Bibcode:2003MNRAS.341....1M. doi:10.1046/j.1365-8711.2003.06256.x.
- "NED results for object UGC 12591". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 16 April 2017.
- Giovanelli, R.; Haynes, M. P.; Rubin, V. C.; Ford, W. K., Jr. (1 February 1986). "UGC 12591 - The most rapidly rotating disk galaxy". The Astrophysical Journal Letters. 301: L7–L11. Bibcode:1986ApJ...301L...7G. doi:10.1086/184613. ISSN 0004-637X.
- "A remarkable galactic hybrid". ESA/Hubble. Retrieved 16 April 2017.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.