NGC 2442 and NGC 2443
Template:Short description Template:Infobox Galaxy
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.[1] 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.[2] Associated with this galaxy is HIPASS J0731-69, a cloud of gas devoid of any stars.[3] It is likely that the cloud was torn loose from NGC 2442 by a companion.[3]
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.[2][4]
Supernovae
Two, or perhaps three, supernovae have been observed in NGC 2442:
- SN 1999ga (type II, mag. 18) was discovered by the Perth Astronomical Research Group on 19 November 1999.[5][6]
- SN 2015F (type Ia, mag. 16.8) was discovered by Libert "Berto" Monard on 9 March 2015.[7][8] It reached magnitude 12.9, making it the brightest supernova of 2015.[9]
- Gaia16cfr, also known as AT 2016jbu,[10][11] was a supernova imposter that occurred in NGC 2442 on 1 December 2016. It reached a Gaia apparent magnitude of 19.3 and absolute magnitude of about −12.[12] However, a paper published in August 2022 suggested that this was a genuine, but strange, supernova.[13]
References
External links
- NGC 2442 in Volans
- Astronomy Picture of the Day
- NGC 2442: Galaxy in Volans 2007 March 15
- NGC 2442: Galaxy in Volans 2010 March 25 - from Hubble Space Telescope data
- NGC 2442: Galaxy in Volans 2017 August 17- from Hubble Space Telescope and European Southern Observatory data
- Template:WikiSky
Template:Catalogs Template:Ngc25
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- ↑ NGC/IC Project Restoration Effortngcicproject.observers.org
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