NGC 7691

NGC 7691 is an intermediate spiral galaxy in the constellation of Pegasus. Its velocity with respect to the cosmic microwave background is 3,676±26 km/s, which corresponds to a Hubble distance of 176.8 ± 12.4 Mly (54.21 ± 3.81 Mpc).^[1] However, four non-redshift measurements give a farther mean distance of 199.44 ± 9.12 Mly (61.150 ± 2.796 Mpc).^[2] It was discovered by German-British astronomer William Herschel on 16 October 1784.^[3][4]

ConstellationPegasus

Right ascension23^h 32^m 24.4185^s[1]

Declination+15° 50′ 52.392″^[1]

Redshift0.013479±0.00000300^[1]

Quick facts Observation data (J2000 epoch), Constellation ...

NGC 7691
NGC 7691 imaged by SDSS
Observation data (J2000 epoch)
Constellation	Pegasus
Right ascension	23h 32m 24.4185s[1]
Declination	+15° 50′ 52.392″[1]
Redshift	0.013479±0.00000300[1]
Heliocentric radial velocity	4,041±1 km/s[1]
Distance	199.44 ± 9.12 Mly (61.150 ± 2.796 Mpc)[1]
Group or cluster	NGC 7711 group (LGG 477)
Apparent magnitude (V)	13.9g[1]
Characteristics
Type	SAB(rs)bc[1]
Size	~153,200 ly (46.96 kpc) (estimated)[1]
Apparent size (V)	1.67′ × 1.25′[1]
Other designations
IRAS 23299+1534, 2MASX J23322441+1550520, UGC 12654, MCG +03-60-001, PGC 71699, CGCG 455-009[1]

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