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]
Apparent magnitude (V) 12.8[1]
Characteristics
Type S0 pec[1]
Apparent size (V) 3′.0 × 0′.9[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

  1. 1 2 3 4 5 6 7 8 "NASA/IPAC Extragalactic Database". Results for NGC 128. Retrieved 2016-01-25.
  2. 1 2 3 "New General Catalog Objects: NGC 100 - 149". Celestial Atlas. Retrieved 25 January 2016.
  3. ↑ "NGC 128". The NGC/IC Project. Retrieved 5 January 2016.
  4. ↑ Aranda,Ted (2011). 3,000 Deep-Sky Objects: An Annotated Catalogue. Springer Science & Business Media. p. 54. ISBN 9781441994196.
  5. ↑ Jarvis, B (1990). "The NGC 128 Group of Galaxies". Dynamics and Interactions of Galaxies. Springer-Verlag Berlin. pp. 416–417.

Coordinates: 00h 29m 15.0s, +02° 51′ 51″

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