UGC 8335
Pair of galaxies in Ursa Major
From Wikipedia, the free encyclopedia
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]
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| UGC 8335 | |
|---|---|
An image of UGC 8335 taken in 2002 by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 13h 15m 32.8s[1] |
| Declination | +62° 07′ 37″[1] |
| Redshift | 0.030831 ± 0.000097[2] |
| Heliocentric radial velocity | 9243 ± 29 km/s [2] |
| Galactocentric velocity | 9364 ± 29 km/s [2] |
| Distance | 128.3 ± 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 | |
| Size | 65.05 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]