NGC 2523

NGC 2523 is a barred spiral galaxy located around 168 million light-years away in the constellation Camelopardalis.^[1] NGC 2523 was discovered on 7 September 1885 by the American astronomer Edward Swift, and is approximately 120,000 light-years across.^[1][2][3] NGC 2523 does not have much star formation, and it does not have an active galactic nucleus.^[2][4]

NGC 2523
NGC 2523 (left) next to NGC 2523B (right)
Observation data (J2000 epoch)
Constellation	Camelopardalis
Right ascension	08h 15m 00.193s[1]
Declination	+73° 34′ 44.167″[1]
Redshift	0.011578 ± 4.00e-5[1]
Distance	168.5 ± 11.8 Mly (51.66 ± 3.62 Mpc)[1]
Group or cluster	NGC 2553 Group (LGG 154)
Apparent magnitude (V)	10.2[1]
Characteristics
Type	SB(r)bc
Size	~120,000 ly (36.79 kpc) (estimated)[1]
Apparent size (V)	2.818′ × 1.778′[1]
Other designations
IRAS 08092+7343, Arp 9, UGC 4271, MCG +12-08-031, PGC 23128, CGCG 331-032[1]

NGC 2523 is one of several galaxies chosen by Halton Arp as an example of a spiral galaxy that has a separation of one of its arms. It is listed in Arp's Atlas of Peculiar Galaxies as Arp 9.^[5]

NGC 2523 group

According to A.M. Garcia, NGC 2523 is the largest and brightest galaxy of the NGC 2523 Group (also known as LGG 154), which contains 5 galaxies, including NGC 2441, NGC 2550A, UGC 4041, and UGC 4199.^[6]

Supernova

One supernova has been observed in NGC 2523: SN 2024aeee (type II, mag. 16) was discovered by Shinichi Ono on 17 December 2024.^[7]

See also

• List of NGC objects (2001–3000)