File:NGC20_-_SDSS_DR14.jpg · Wikimedia Commons · See Wikimedia Commons
NGC 20
Sign in to saveAlso known as Thiên thể NGC 6, Thiên thể NGC 20
lenticular galaxy in the Andromeda constellation
Key facts
- Constellation
- Andromeda
- Right ascension
- 00 09 32.8
- Declination
- +33 ° 18 ′ 31 ″
- Heliocentric radial velocity
- 4971 ± 49 km/s
- Type
- Lenticular
via Wikipedia infobox
Wikidata facts
- Instance of
- lenticular galaxy
- Constellation
- Andromeda
- Distance from Earth
- 66.62
- Image
- NGC20 - SDSS DR14.jpg
Show 11 more facts
- redshift
- 0.016872
- Commons category
- NGC 6
- apparent magnitude
- 9.420
- catalog code
- Gaia DR2 2875623579839587328
- discoverer or inventor
- William Parsons, 3rd Earl of Rosse
- time of discovery or invention
- 1857-09-18
- galaxy morphological type
- E/S0
- right ascension
- 2.38617798743120
- declination
- 33.30874343173270
- radial velocity
- 4936
- epoch
- J2000.0
Sources (1)
via Wikidata · CC0
~1 min read
Encyclopedic overview
NGC 20 (also known as NGC 6) is a lenticular galaxy in the constellation of Andromeda.
The double name of the galaxy is due to the history of its discoveries: for the first time it was discovered on September 18, 1857, by Irish astronomer R. J. Mitchell, an assistant to William Parsons, Lord Rosse; however, the information was not published until Lawrence Parsons, the son of W. Parsons, did so in 1880. The galaxy was independently rediscovered by Herman Schultz on October 16, 1866, and by Lewis Swift in 1885. As a result, J. L. E. Dreyer cataloged it twice in the New General Catalogue, as NGC 6 (from Swift's observation) and NGC 20 (from Lord Rosse's).
Excerpted from Wikipedia’s “NGC 20” article, available under the CC BY-SA 4.0 licence.