NGC 1531
NGC 1531 (above) with large barred spiral galaxy NGC 1532
Observation data (J2000 epoch)
Constellation	Eridanus
Right ascension	04h 11m 59.3s[1]
Declination	−32° 51′ 03″[1]
Redshift	1169 ± 29 km/s[1]
Distance	42.4 million light-years
Apparent magnitude (V)	12.9[1]
Characteristics
Type	S0 pec[1]
Size	~15 kly (diameter)
Apparent size (V)	1.3′ × 0.9′[1]
Other designations
PGC 14635[1]

NGC 1531 is a dwarf galaxy in the constellation Eridanus that is interacting with the larger spiral galaxy NGC 1532.^[2] It was discovered by John Herschel on 19 October 1835.^[3] Although technically classified as a peculiar lenticular galaxy, the galaxy's structure is better described as amorphous.^[2]

• NGC 4627 - a similar interacting dwarf galaxy
• M51B - a similar interacting dwarf galaxy

• Media related to NGC 1531 at Wikimedia Commons
• NASA Astronomy Picture of the Day: NGC 1531/2 (10 July 1998)
• NASA Astronomy Picture of the Day: Interacting Galaxies (1 March 2005)
• NASA Astronomy Picture of the Day: Galaxies in the River (8 January 2020)
• NGC 1531 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

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