Key facts
- Constellation
- Ursa Major
- Right ascension
- 09 24 37.698
- Declination
- +49 ° 21 ′ 25.69 ″
- Redshift
- 0.016301 ± 0.000023
- Heliocentric radial velocity
- 4887 ± 7 km/s
- Galactocentric velocity
- 4917 ± 7 km/s
- Distance
- 69.050 ± 00 Mpc (225.21 ± 0.00 Mly ) h , 0.73
- Absolute magnitude v
- -21.92 ± 0.22
- Type
- SA(s)c
- Size
- 125,000
- Apparent size v
- 1.70′ × 1.43′
via Wikipedia infobox
~1 min read
Encyclopedic overview
NGC 2857 (also known as Arp 1 and PGC 26666) is a spiral galaxy in the constellation Ursa Major. It was discovered on January 9, 1856, by R. J. Mitchell.
NGC 2857 is the first object in Halton Arp's Atlas of Peculiar Galaxies, and one of six Arp objects in the 'Low Surface Brightness Galaxies' section. The other five low surface brightness galaxies are Arp 2 (UGC 10310), Arp 3, Arp 4, Arp 5 (NGC 3664), and Arp 6 (NGC 2537).
Excerpted from Wikipedia’s “NGC 2857” article, available under the CC BY-SA 4.0 licence.