NGC 488

NGC 488 is a face-on spiral galaxy in the constellation Pisces. It is at a distance of about 90 million light-years away from Earth.[3] Its diameter is estimated to be 52,6 Kpc (171.000 ly).[1] The galaxy has a large central bulge, and is considered a prototype galaxy with multiple spiral arms. Its arms are tightly wound. Star forming activity has been traced within the arms.[2] The nucleus of NGC 488 has been found to be chemically decoupled, being twice as metal rich as the central bulge of the galaxy. NGC 488, with the exception of its smaller companions, that form NGC 488 group, is an isolated galaxy.[4]

NGC 488
Observation data (J2000 epoch)
ConstellationPisces
Right ascension 01h 21m 46.8s[1]
Declination+15° 24′ 19″[1]
Redshift2272 ± 1 km/s[1]
Distance98.3 ± 3.9 Mly (30.15 ± 1.2 Mpc)[1]
Apparent magnitude (V)10.4
Characteristics
TypeSA(r)b[1]
Apparent size (V)5′.4 × 3′.9[1]
Notable featuresPrototype galaxy with multiple spiral arms[2]
Other designations
UGC 907, PGC 4946[1]

The galaxy was discovered by William Herschel on 13 December 1784. Two supernovae have been observed in NGC 488, SN 2010eb, possibly Ia with peak magnitude 14.7, and SN 1976G, with magnitude 15.[5]

References
  1. "NASA/IPAC Extragalactic Database". Results for NGC 488. Retrieved 2006-11-18.
  2. Sandage, A., Bedke, J. (1994), The Carnegie Atlas of Galaxies. Volume I, Carnegie Institution of Washington, p. 15
  3. NGC 488 Galaxy Galaxies and Clusters of Galaxies, Isaac Newton Group of Telescopes
  4. Sil'chenko, O. K. (March 1999). "Chemically decoupled nucleus and the structure of the nuclear region in the spiral galaxy NGC 488". Astronomy Letters. 25 (3): 140–8. Bibcode:1999AstL...25..140S. Retrieved 29 December 2015.
  5. List of Supernovae IAU Central Bureau for Astronomical Telegrams. Retrieved 29 December 2015.
  • Media related to NGC 488 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.