NGC 488

NGC 488
NGC 488 by Mount Lemmon Observatory
Observation data (J2000 epoch)
ConstellationPisces
Right ascension01h 21m 46.7904s[1]
Declination+05° 15′ 24.696″[1]
Redshift0.007579[1]
Heliocentric radial velocity2272 ± 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]
Size~185,800 ly (56.97 kpc) (estimated)[1]
Apparent size (V)5.4′ × 3.9′[1]
Notable featuresPrototype galaxy with multiple spiral arms[2]
Other designations
IRAS 01191+0459, UGC 907, MCG +01-04-033, PGC 4946, CGCG 411-033[1]

NGC 488 is a face-on spiral galaxy in the constellation Pisces. It was discovered by German-British astronomer William Herschel on 13 December 1784.[3] It is at a distance of about 90 million light-years away from Earth.[4] 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.[5]

Supernovae

Two supernovae have been observed in NGC 488:

  • SN 1976G (type unknown, mag. 15) was discovered by Miklós Lovas on 21 October 1976.[6][7] It was also independently discovered by Paul Wild on 23 October 1976.[8]
  • SN 2010eb (type Ia, mag. 14.7) was discovered by Libert (Berto) Monard on 12 June 2010.[9][10]

See also

References

  1. ^ a b c d e f g h i j "NASA/IPAC Extragalactic Database". Results for object NGC 488. Retrieved 2006-11-18.
  2. ^ a b Sandage, A., Bedke, J. (1994), The Carnegie Atlas of Galaxies. Volume I, Carnegie Institution of Washington, p. 15
  3. ^ Seligman, Courtney. "New General Catalogue Objects: NGC 488". Celestial Atlas. Retrieved 4 December 2024.
  4. ^ NGC 488 Galaxy Galaxies and Clusters of Galaxies, Isaac Newton Group of Telescopes
  5. ^ 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.
  6. ^ Szeidl, B.; Lovas, M. (1976). "Supernova in NGC 488". International Astronomical Union Circular (2998): 1. Bibcode:1976IAUC.2998....1S.
  7. ^ "SN 1976G". Transient Name Server. IAU. Retrieved 4 December 2024.
  8. ^ Wild, P.; Szeldl, B.; Lovas, M. (1976). "Supernovae". International Astronomical Union Circular (2999): 2. Bibcode:1976IAUC.2999....2W.
  9. ^ Monard, L. A. G. (2010). "Supernova 2010eb in NGC 488". Central Bureau Electronic Telegrams. 2321: 1. Bibcode:2010CBET.2321....1M.
  10. ^ "SN 2010eb". Transient Name Server. IAU. Retrieved 4 December 2024.