NGC 128
| NGC 128 | |
|---|---|
| Observation data | |
| Constellation | Pisces |
| Right ascension | 00h 29m 15.0s[1] |
| Declination | 2° 51′ 51″[1] |
| Redshift | 4241 ± 16 km/s[1] |
| Type | S0 pec[1] |
| Apparent dimensions (V) | 3′.0 × 0′.9[1] |
| Apparent magnitude (V) | 12.8[1] |
| Other designations | |
| UGC 00292,[1] PGC 1791,[1] | |
NGC 128 is a lenticular galaxy in the constellation Pisces. It is approximately 190 million light-years from earth and has a diameter of about 165,000 light years. [2]
Discovery
NGC 128 was discovered by astronomer William Herschel on 25 December 1790 using a reflecting telescope with an aperture of 18.7 inches. At the time of discovery, its coordinates were recorded as 00h 22m 05s, +87° 54.6′ -20.0″. [3] It was later observed by John Herschel on 12 October 1827.[2]
Visual appearance
The galaxy is described as "pretty bright", "very small" with a "brighter middle". It is approximately 165,000 light years in diameter and is elongated.[4][2]
Galaxy group information
NGC 128 is the largest member, and the namesake of, the NGC 128 group which also includes the galaxies NGC 127 and NGC 130. NGC 128 has a strong tidal bridge with NGC 127 and there is evidence of interaction between all three galaxies in the group. NGC-128 has a noticeable peanut shape that is likely to be caused by gravitational effects of the other two galaxies.[5]
See also
References
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