Galaxy in the constellation Sculptor

NGC 7645

1 min read
In 26 languages
2 images

All data from the card 10

Constellation: Sculptor
Right ascension: 23h 23m 47.3070s
Declination: −29° 23′ 17.083″
Redshift: 0.023086±0.00000900
Heliocentric radial velocity: 6,921±3 km/s
Distance: 318.6 ± 22.3 Mly (97.68 ± 6.84 Mpc)
Apparent magnitude (V): 13.77
Type: SB(r)c
Size: ~205,600 ly (63.04 kpc) (estimated)
Apparent size (V): 1.4′ × 1.2′

NGC 7645 is a barred spiral galaxy in the constellation of Sculptor. Its velocity with respect to the cosmic microwave background is 6,623±21 km/s, which corresponds to a Hubble distance of 318.6 ± 22.3 Mly (97.68 ± 6.84 Mpc). It was discovered by British astronomer John Herschel on 27 September 1834.

Pair of galaxies

According to Soares and colleagues, NGC 7645 and NGC 7636 form a galaxy pair with a probability of 0.57. The Hubble distance to NGC 7636 is 323.1 ± 22.7 Mly (99.06 ± 6.96 Mpc), which is close to that of NGC 7645. The galaxies are separated by an angular distance of 17.4′.

Supernovae

Two supernovae have been observed in NGC 7645:

SN 2010kx (Type II-P, mag. 17.5) was discovered by Kōichi Itagaki on 19 December 2010.
SN 2026aabq (Type IIb, mag. 19.7) was discovered by GOTO on 23 August 2026.

NGC 7645

Pair of galaxies

Supernovae

Read next

In 26 languages