NGC 257

NGC 257 is a spiral galaxy in the Pisces constellation. It was discovered on December 29, 1790, by Frederick William Herschel.[4]

NGC 257
Observation data (J2000 epoch)
ConstellationPisces
Right ascension 00h 48m 01.510s[1]
Declination+08° 17′ 49.45″[1]
Redshift0.017592[2]
Helio radial velocity5274 km/s[2]
Distance219.64 ± 34.73 Mly (67.343 ± 10.649 Mpc)[2]
Apparent magnitude (B)13.7[3]
Characteristics
TypeScd?[2]
Size141,000 ly (43,100 pc)[2][note 1]
Apparent size (V)3.0′ × 2.5′[2]
Other designations
UGC 493, MGC+01-03-003, PGC 2818

References
  1. Skrutskie, M. (2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708.
  2. "NED results for object NGC 0257". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 25 June 2017.
  3. "NGC 257". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 25 June 2017.
  4. Seligman, Courtney. "New General Catalogue objects: NGC 250 - 299". cseligman.com. Retrieved 25 June 2017.

Notes
  1. POSS1 103a-O values used.
  • Media related to NGC 257 at Wikimedia Commons


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.