UGC 8335

UGC 8335 (Arp 238) is a pair of strongly interacting spiral galaxies. They have been distorted by extreme tidal forces, creating prominent tidal tails and a bridge of gas and stars between the galaxies.[4][5]

UGC 8335
An image of UGC 8335 taken in 2002 by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension13h 15m 32.8s[1]
Declination+62° 07′ 37″[1]
Redshift0.030831 ± 0.000097[2]
Heliocentric radial velocity9243 ± 29 km/s [2]
Galactocentric velocity9364 ± 29 km/s [2]
Distance128.3 ± 9.0 Mpc (418 ± 29 Mly) h−1
0.73[1]
Apparent magnitude (V)14.4 ± 0.4 [2]
Absolute magnitude (V)-21.19 ± 0.64 [2]
Characteristics
Size65.05 kpc × 26.67 kpc (212.2 kly × 87.0 kly) [1]
Apparent size (V)1.70′ × 0.70′[3]
Other designations
KPG 369, Arp 238, PGC 46133, VV 250

UGC 8335 is about 400 million light-years from Earth, in the constellation Ursa Major. It is the 238th object in Halton Arp's Atlas of Peculiar Galaxies.[4]

Supernova

On 25 April 2012, Doug Rich discovered supernova SN 2012by in UGC 8335.[6][7] At the time of discovery, the supernova had a magnitude of 17.6.[8] A peak magnitude measurement of 17.3 was recorded two days later, on April 27.[6] SN 2012by was classified as a type II supernova by Tomasella et al. at the Astronomical Observatory of Padova. The research group also found that its spectrum was similar to that of SN 1996as.[8]

References
  1. "UGC 8335". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2015-12-10.
  2. "NASA/IPAC Extragalactic Database". Results for UGC 8335. Retrieved 2015-12-10.
  3. Nilson, P. (1973), Uppsala General Catalogue of Galaxies, Acta Universitatis Upsalienis, Nova Regiae Societatis Upsaliensis, Series V: A Vol. 1
  4. "HubbleSite - NewsCenter - Cosmic Collisions Galore!". hubblesite.org. 2008-04-24. Retrieved 2015-12-10.
  5. "Astronomy Picture of the Day: 4/19/13 - UGC 8335". Futurism. Retrieved 2015-12-10.
  6. "Bright Supernovae - 2012". www.rochesterastronomy.org. Retrieved 2015-12-10.
  7. "List of Supernovae". www.cbat.eps.harvard.edu. Retrieved 2015-12-10.
  8. Green, Daniel (2012-04-29). "[IAUC] CBET 3095: 20120429 : SUPERNOVA 2012by IN UGC 8335 = PSN J13152890+6207478". Electronic Telegram No. 3095. Central Bureau for Astronomical Telegrams. Archived from the original on 2015-12-24. Retrieved 2015-12-10.
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