NGC 977
Galaxy in the constellation Cetus
From Wikipedia, the free encyclopedia
NGC 977 is a intermediate spiral galaxy in the constellation of Cetus. Its velocity with respect to the cosmic microwave background is 4,356±19 km/s, which corresponds to a Hubble distance of 209.6 ± 14.7 Mly (64.25 ± 4.51 Mpc).[1] Additionally, six non-redshift measurements give a similar mean distance of 217.00 ± 17.56 Mly (66.533 ± 5.384 Mpc).[2] It was discovered by German-British astronomer William Herschel on 28 November 1785.[3][4]
| NGC 977 | |
|---|---|
NGC 977 imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 02h 33m 03.4241s[1] |
| Declination | −10° 45′ 35.544″[1] |
| Redshift | 0.015274±0.0000370[1] |
| Heliocentric radial velocity | 4,579±11 km/s[1] |
| Distance | 217.00 ± 17.56 Mly (66.533 ± 5.384 Mpc)[1] |
| Group or cluster | NGC 945 group (LGG 63) |
| Apparent magnitude (V) | 13.5[1] |
| Characteristics | |
| Type | (R')SAB(r)a[1] |
| Size | ~126,300 ly (38.71 kpc) (estimated)[1] |
| Apparent size (V) | 1.9′ × 1.6′[1] |
| Other designations | |
| 2MASX J02330342-1045361, MCG -02-07-031, PGC 9713[1] | |
NGC 977 is a Seyfert II galaxy, i.e. it has a quasar-like nucleus with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.[5][6]
NGC 945 group
Supernova
One supernova has been observed in NGC 977:
- SN 1976J (type unknown, mag. 15.5) was discovered by Italian astronomer Leonida Rosino on 15 December 1976.[9][10] Although it was never officially classfied, its light curve suggested that it was a Type I supernova.[11]
