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NGC 2442 and NGC 2443

Coordinates: Sky map 07h 36m 23.8s, −69° 31′ 51″
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NGC 2442 / 2443
NGC 2442 was taken by the Wide Field Imager on the MPG/ESO 2.2-metre telescope
Observation data (J2000 epoch)
ConstellationVolans
Right ascension07h 36m 23.8s[1]
Declination−69° 31′ 51″[1]
Redshift1466 ± 5 km/s[1]
Apparent magnitude (V)11.2[1]
Characteristics
TypeSAB(s)bc pec[1]
Apparent size (V)5′.5 × 4′.9[1]
Notable featuresSW part is NGC 2442
while NE part is NGC 2443
Other designations
PGC 21373[1]

NGC 2442 and NGC 2443 are two parts of a single intermediate spiral galaxy, commonly known as the Meathook Galaxy. It is about 50 million light-years away in the constellation Volans, and was discovered by Sir John Herschel on December 23, 1834.[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]

Gaia16cfr 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.[4]

Gallery

  • This close-up Hubble view of the Meathook Galaxy (NGC 2442) focuses on the more compact of its two asymmetric spiral arms as well as the central regions.
    This close-up Hubble view of the Meathook Galaxy (NGC 2442) focuses on the more compact of its two asymmetric spiral arms as well as the central regions.
  • NGC 2442 core and south wing close up by Hubble Space Telescope, 3.4′ view.
    NGC 2442 core and south wing close up by Hubble Space Telescope, 3.4′ view.
  • NGC 2442/2443 without any filters.
    NGC 2442/2443 without any filters.

References

  1. ^ a b c d e f g "NASA/IPAC Extragalactic Database". Results for NGC 2442 / 2443. Retrieved 2006-11-25.
  2. ^ Seligman, Courtney. "Celestial Atlas: NGC Objects: NGC 2400 - 2449". cseligman.com. Archived from the original on 10 July 2015. Retrieved 10 July 2015.
  3. ^ a b Ryder, 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.
  4. ^ Kilpatrick, Charles D.; Foley, Ryan J.; Drout, Maria R.; Pan, Yen-Chen; Panther, Fiona H.; Coulter, David A.; Filippenko, Alexei V.; Marion, G. Howard; Piro, Anthony L.; Rest, Armin; Seitenzahl, Ivo R.; Strampelli, Giovanni; Wang, Xi E. (2018). "Connecting the progenitors, pre-explosion variability and giant outbursts of luminous blue variables with Gaia16cfr". Monthly Notices of the Royal Astronomical Society. 473 (4): 4805. arXiv:1706.09962. Bibcode:2018MNRAS.473.4805K. doi:10.1093/mnras/stx2675.

External links

Wikimedia Commons has media related to NGC 2442.



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