Key facts
- Constellation
- Andromeda
- Right ascension
- 01 25 20.7140
- Declination
- +34 ° 01 ′ 30.524 ″
- Heliocentric radial velocity
- 4,761 ± 2 km/s
- Galactocentric velocity
- 4,481 ± 20 km/s
- Distance
- 203.46 ± 6.55 Mly (62.381 ± 2.007 Mpc )
- Group or cluster
- NGC 507 Group (LGG 26)
- Type
- SBc /Pec
- Size
- ~189,400 ly (58.07 kpc ) (estimated)
- Apparent size v
- 2.5′ × 0.7′
via Wikipedia infobox
~1 min read
Encyclopedic overview
NGC 523, also known as Arp 158 from the ARP catalog, is a spiral galaxy located in the constellation Andromeda. It was discovered by German-British astronomer William Herschel on 13 September 1784. Heinrich d'Arrest rediscovered it on 13 August 1862 and listed it as NGC 523, whereas Herschel's original discovery was listed as NGC 537. John Dreyer noted in the New General Catalogue that NGC 523 is a double nebula.
Supernova
Excerpted from Wikipedia’s “NGC 523” article, available under the CC BY-SA 4.0 licence.