File:Caldwell_18_(50289818793).jpg · Wikimedia Commons · See Wikimedia Commons
Q490334
Sign in to saveAlso known as New General Catalogue 185
peculiar galaxy in the constellation Cassiopeia
Key facts
- Constellation
- Cassiopeia
- Right ascension
- 00 38 57.970
- Declination
- +48 ° 20 ′ 14.56 ″
- Redshift
- −202 ± 3 km / s
- Distance
- 2.05 ± 0.13 Mly (630 ± 40 kpc )
- Type
- dSph/dE3, Sy2
- Size
- 10,600 ly (3.25 kpc ) (estimated)
- Apparent size v
- 11.7 ′ × 10.0 ′
- Notable features
- Satellite galaxy of the, Andromeda Galaxy
via Wikipedia infobox
Wikidata facts
- Distance from Earth
- 620
- Image
- NGC 0185 2MASS.jpg
Show 9 more facts
- Commons category
- NGC 185
- catalog code
- Caldwell 18
- time of discovery or invention
- 1787-11-30
- apparent magnitude
- 6.562
- redshift
- -0.000674
- right ascension
- 9.7415417
- declination
- 48.3373778
- radial velocity
- -203.8
- galaxy morphological type
- dGspD...
Sources (1)
via Wikidata · CC0
~2 min read
Article
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 II 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.
Distance measurements