Astronomy:NGC 84

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Short description: Star in the constellation Andromeda
NGC 84
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NGC 84
Credit: SDSS
Observation data
Equinox J2000.0]] (ICRS)
Constellation Andromeda[1]
Right ascension  00h 21m 21.2s[2]
Declination +22° 37′ 11″[2]

NGC 84 is a star located in the constellation Andromeda.[3] NGC 84 is often misidentified in astronomical literature as a galaxy rather than a single star.[3] It was first discovered on November 14, 1884, by the French astronomer Guillaume Bigourdan, who is well known for his successes in cataloging faint celestial forms.[4]

NGC stands for the New General Catalogue, a listing of deep space objects like star clusters, nebulae, and galaxies. The NGC includes over 7,800 objects and remains one of the most commonly used astronomical catalogs today.[5]

NGC 84 is located at a right ascension of 00h 21m 21.25s and a declination of +22° 37′ 10.90″.[6] Due to its extreme faintness, it is not visible to the naked eye and requires a telescope for observation.[6]

Located near the celestial equator, NGC 84 can be observed from both the Northern and Southern Hemispheres during certain times of the year.[7] This location offers an opportunity for astronomers to study it, though its low brightness and distant location make it extremely challenging to observe.[6]

References

  1. Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode1987PASP...99..695R  Constellation record for this object at VizieR.
  2. 2.0 2.1 "NED results for object NGC 0084". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+84&extend=no&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES. 
  3. 3.0 3.1 Astronomy, Go. "NGC 84 | star in Andromeda | New General Catalogue" (in en-US). https://www.go-astronomy.com/ngc.php?ID=89. 
  4. Beall, Abigail (December 2019). "Stargazing at home 2: See the Andromeda galaxy" (in en). New Scientist 244 (3260): 51. doi:10.1016/S0262-4079(19)32380-2. https://linkinghub.elsevier.com/retrieve/pii/S0262407919323802. 
  5. Brasch, Klaus R. (2024-09-01). "Get to know the Andromeda Galaxy" (in en-US). https://www.astronomy.com/science/getting-to-know-the-andromeda-galaxy/. 
  6. 6.0 6.1 6.2 Ford, Dominic (2014), The Deep Sky, The Patrick Moore Practical Astronomy Series, New York, NY: Springer New York, pp. 199–204, doi:10.1007/978-1-4939-0629-1_9, ISBN 978-1-4939-0628-4, https://doi.org/10.1007/978-1-4939-0629-1_9, retrieved 2025-04-22 
  7. Sohn, Rebecca; updated, Nola Taylor Tillman last (2018-01-10). "The Andromeda Galaxy (M31): Location, Characteristics & Images" (in en). https://www.space.com/15590-andromeda-galaxy-m31.html.