NGC 128

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NGC 128
NGC 128 (upper left) and NGC 125 (lower middle)
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]
Type S0 pec[1]
Apparent size (V) 3′.0 × 0′.9[1]
Other designations
UGC 00292,[1] PGC 1791,[1]
See also: Galaxy, List of galaxies

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]


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[edit]

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]The galaxy is famous for its (peanut shell)-shaped bulge, and in 2016 it was discovered that there are two such nested structures, possibly associated with two stellar bars.[5]

Galaxy group information[edit]

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.[6]

See also[edit]


  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 128. Retrieved 2016-01-25. 
  2. ^ a b c "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. ^ Bogdan C. Ciambur; Alister W. Graham (2016), Quantifying the (X/peanut)-shaped structure in edge-on disc galaxies: length, strength, and nested peanuts
  6. ^ Jarvis, B (1990). "The NGC 128 Group of Galaxies". Dynamics and Interactions of Galaxies. Springer-Verlag Berlin. pp. 416–417. 

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