NGC 128
NGC 128 with smaller galaxies NGC 130 (left) and NGC 127 (right)
Observation data (J2000 epoch)
ConstellationPisces
Right ascension00h 29m 15.047s[1]
Declination+02° 51′ 50.60″[1]
Redshift0.01466[1]
Heliocentric radial velocity4363 km/s[1]
Distance190 Mly (58 Mpc)[2]
Apparent magnitude (V)11.63[3]
Apparent magnitude (B)12.65[3]
Characteristics
TypeS0[1]
Other designations
UGC 292, MCG +00-02-051, PGC 1791[1]

NGC 128 is a lenticular galaxy in the constellation Pisces. It is approximately 190 million light-years from the Sun 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″.[4] 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.[5][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.[6]

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.[7]

See also

References

  1. 1 2 3 4 5 6 "NGC 128". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-12.
  2. 1 2 3 4 "New General Catalog Objects: NGC 100 - 149". Celestial Atlas. Retrieved 25 January 2016.
  3. 1 2 "Search specification: NGC 128". HyperLeda. Université Claude Bernard Lyon 1. Retrieved 2021-02-12.
  4. ↑ "NGC 128". The NGC/IC Project. Archived from the original on 28 May 2009. Retrieved 5 January 2016.
  5. ↑ Aranda,Ted (2011). 3,000 Deep-Sky Objects: An Annotated Catalogue. Springer Science & Business Media. p. 54. ISBN 9781441994196.
  6. ↑ Bogdan C. Ciambur; Alister W. Graham (2016), Quantifying the (X/peanut)-shaped structure in edge-on disc galaxies: length, strength, and nested peanuts
  7. ↑ Jarvis, B (1990). "The NGC 128 Group of Galaxies". Dynamics and Interactions of Galaxies. Springer-Verlag Berlin. pp. 416–417. doi:10.1007/978-3-642-75273-5_104. ISBN 978-3-642-75275-9.
  • Media related to NGC 128 at Wikimedia Commons


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