NGC 2442 (upper spiral structure) and NGC 2443 (lower horizontal spiral arm)[1]
Observation data (J2000 epoch)
Constellation
Volans
Right ascension
07h 36m 23.8s[2]
Declination
−69° 31′ 51″[2]
Redshift
1466 ± 5 km/s[2]
Apparent magnitude (V)
11.2[2]
Characteristics
Type
SAB(s)bc pec[2]
Apparent size (V)
5′.5 × 4′.9[2]
Notable features
SW part is NGC 2442 while NE part is NGC 2443
Other designations
PGC 21373[2]
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NGC 2442 and NGC 2443 are two parts of a single intermediate spiral galaxy, commonly known as the Meathook Galaxy or the Cobra and Mouse.[3] It is about 50 million light-years away in the constellation Volans. It was discovered by Sir John Herschel on December 23, 1834 during his survey of southern skies with a 18.25 inch diameter reflecting telescope (his "20-foot telescope") from an observatory he set up in Cape Town, South Africa.[4] Associated with this galaxy is HIPASS J0731-69, a cloud of gas devoid of any stars.[5] It is likely that the cloud was torn loose from NGC 2442 by a companion.[5]
When John Louis Emil Dreyer compiled the New General Catalogue of Nebulae and Clusters of Stars he used William Herschel's earlier observations that described two objects in a "double nebula", giving the northern most the designation NGC 2443 and the southernmost most the designation NGC 2442. Herschel's later observations noted that the two objects were actually a single large nebula.[4][6]
^ abcdefg"NASA/IPAC Extragalactic Database". Results for NGC 2442 / 2443. Retrieved 2023-02-08.
^Chadwick, S; Cooper, I (11 December 2012). Imaging the Southern Sky. New York: Springer. p. 263. ISBN 978-1461447498.
^ abSeligman, Courtney. "Celestial Atlas: NGC Objects: NGC 2400 - 2449". cseligman.com. Archived from the original on 9 September 2015. Retrieved 10 July 2015.
^ abRyder, S.D.; et al. (July 2001). "HIPASS Detection of an Intergalactic Gas Cloud in the NGC 2442 Group". The Astrophysical Journal. 555 (1): 232–239. arXiv:astro-ph/0103099. Bibcode:2001ApJ...555..232R. doi:10.1086/321453. S2CID 14455875.
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