NGC 185

NGC 185 (also known as Caldwell 18) is a dwarf spheroidal galaxy located 2.08 million light-years from Earth, appearing in the constellation Cassiopeia. It is a member of the Local Group, and is a satellite of the Andromeda Galaxy (M31). NGC 185 was discovered by William Herschel on November 30, 1787, and he cataloged it "H II.707". John Herschel observed the object again in 1833 when he cataloged it as "h 35", and then in 1864 when he cataloged it as "GC 90" within his General Catalogue of Nebulae and Clusters. NGC 185 was first photographed between 1898 and 1900 by James Edward Keeler with the Crossley Reflector of Lick Observatory. Unlike most dwarf elliptical galaxies, NGC 185 contains young stellar clusters, and star formation proceeded at a low rate until the recent past. NGC 185 has an active galactic nucleus (AGN) and is usually classified as a type 2 Seyfert galaxy, though its status as a Seyfert is questioned. It is possibly the closest Seyfert galaxy to Earth, and is the only known Seyfert in the Local Group.

NGC 185
NGC 185
Observation data (J2000.0 epoch)
ConstellationCassiopeia
Right ascension00h 38m 57.970s
Declination+48° 20 14.56
Redshift−202 ± 3 km/s
Distance2.05 ± 0.13 Mly (630 ± 40 kpc)[a]
Apparent magnitude (V)10.1
Characteristics
TypedSph/dE3, Sy2
Apparent size (V)11.7 × 10.0
Notable featuresSatellite galaxy of the
Andromeda Galaxy
Other designations
UGC 396, PGC 2329, LEDA 2329, Caldwell 18
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.