NGC 488
| NGC 488 | |
|---|---|
NGC 488 by Mount Lemmon Observatory
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| Observation data (J2000 epoch) | |
| Constellation | Pisces |
| Right ascension | 01h 21m 46.8s |
| Declination | +15° 24′ 19″ |
| Redshift | 2272 ± 1 km/s |
| Distance | 98.3 ± 3.9 Mly (30.15 ± 1.2 Mpc) |
| Apparent magnitude (V) | 10.4 |
| Characteristics | |
| Type | SA(r)b |
| Apparent size (V) | 5′.4 × 3′.9 |
| Notable features | Prototype galaxy with multiple spiral arms |
| Other designations | |
| UGC 907, PGC 4946 | |
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. Its diametre is estimated to be 52,6 Kpc (171.000 ly). The galaxy has a large central bulge is considered the prototype galaxy with multiple spiral arms. Its arms are tightly wound. Star forming activity has been traced within the arms. The nucleus of NGC 488 has been found to be chemically decoupled, being twice 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.
It 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.
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