UGC 12682

UGC 12682
UGC 12682 imaged by the Hubble Space Telescope.[1]
Observation data (J2000 epoch)
Constellation	Pegasus
Right ascension	23h 34m 53.212s[2]
Declination	+18° 13′ 36.804″
Redshift	0.004623
Heliocentric radial velocity	1389 km/s
Distance	49.2 ± 3.7 Mly (15.10 ± 1.12 Mpc)[3]
Characteristics
Type	Im[3]
Size	~30,400 ly (9.31 kpc) (estimated)[3]
Other designations
UCM 2332+1757, DDO 218, IRAS 23323+1757, MCG +03-60-007, PGC 71801, CGCG 455-020, SDSS J233453.21+181336.8
References: MCG

UGC 12682 is an irregular galaxy, located in the constellation of Pegasus. Its velocity with respect to the cosmic microwave background is 1024 ± 25 km/s, which corresponds to a Hubble distance of 49.2 ± 3.7 Mly (15.10 ± 1.12 Mpc).^[3] In addition, one non redshift measurement gives a distance of 65 Mly (20.0 Mpc).^[4] The earliest known reference to this galaxy is from the 1959 journal A Catalogue of Dwarf Galaxies by Sidney Van Den Bergh, where it is listed as DDO 218.^[5]

On 7 November 2008, 14-year-old amateur astronomer Caroline Moore from Warwick, New York, became the youngest supernova discoverer at the time, when she found SN 2008ha (Type Ia, mag. 18.8)^[6] in UGC 12682.^[1][7]

1. ^ ^{a b} "A failed supernova?". www.spacetelescope.org. Retrieved 9 July 2018.
2. ^ "UGC 12682". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 9 July 2018.
3. ^ ^{a b c d} "Results for object UGC 12682". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2021-02-28.
4. ^ "Distance Results for UGC 12682". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 12 November 2024.
5. ^ Van Den Bergh, Sidney (1959). "A Catalogue of Dwarf Galaxies". Publications of the David Dunlap Observatory. 2 (5): 147. Bibcode:1959PDDO....2..147V.
6. ^ "SN 2008ha". Transient Name Server. IAU. Retrieved 12 November 2024.
7. ^ "New York Teen Finds Wimpiest Supernova". Sky & Telescope. June 12, 2009.

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