NGC 2857 explained

NGC 2857
Epoch:J2000
Constellation Name:Ursa Major[1]
Ra: [2]
Z:0.016301 ± 0.000023 [3]
H Radial V:4887 ± 7 km/s
Gal V:4917 ± 7 km/s
Dist Ly:69.05+/-
Type:SA(s)c
Size:125,000
Appmag V:12.27
Appmag B:12.90
Absmag V:-21.92 ± 0.22
Size V:1.70′ × 1.43′
Names:NGC 2857, Arp 1, APG 1, PGC 26666, UGC 5000

NGC 2857 (also known as Arp 1 and PGC 26666) is a spiral galaxy in the constellation Ursa Major. It was discovered on January 9, 1856, by R. J. Mitchell.

NGC 2857 is the first object in Halton Arp's Atlas of Peculiar Galaxies, and one of six Arp objects in the 'Low Surface Brightness Galaxies' section. The other five low surface brightness galaxies are Arp 2 (UGC 10310), Arp 3, Arp 4, Arp 5 (NGC 3664), and Arp 6 (NGC 2537).[4]

On October 10, 2012, supernova SN 2012fg was observed in NGC 2857 by the MASTER-Kislovodsk auto-detection system.[5] [6] Its absolute magnitude was calculated to be -19.8.[7] The spectrum of SN 2012fg was recorded and analyzed by multiple teams of scientists as it changed rapidly in the days following its detection.[8] [9]

External links

Notes and References

  1. Web site: Courtney . Seligman . New General Catalog Objects: NGC 2850 - 2899 . 2015-11-29.
  2. Web site: SIMBAD Astronomical Database . Results for NGC 2857 . 2015-11-29.
  3. Web site: NASA/IPAC Extragalactic Database . Results for NGC 2857 . 2015-11-29 . dead . https://web.archive.org/web/19971222113324/http://ned.ipac.caltech.edu/ . 1997-12-22.
  4. Web site: Halton . Arp . Atlas of Peculiar Galaxies . 1966 . 2015-11-25.
  5. Web site: ATel #4489: up B,V,R,I photometry bright SN 2012fg in NGC 2857 discovered by MASTER. The Astronomer's Telegram. 2015-11-30. Pruzginskaya. etal.
  6. Web site: ATel #4459: Bright PSN in NGC2857. The Astronomer's Telegram. 2015-11-30. Shumkov. etal.
  7. Web site: ATel #4466: Spectroscopic Observation of the Bright PSN in NGC2857 by the Nearby Supernova Factory II. The Astronomer's Telegram. 2015-11-30. Cellier-Holzem. etal.
  8. Web site: ATel #4496: Spectrum of bright SN 2012fg in NGC 2857. The Astronomer's Telegram. 2015-11-30. Fabrika. etal.
  9. Web site: ATel #4520: Spectrum change of bright SN 2012fg in NGC 2857. The Astronomer's Telegram. 2015-11-30. Fabrika. etal.

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