Key facts
- Constellation
- Cetus
- Right ascension
- 00 56 42.653
- Declination
- −09 ° 54 ′ 49.883 ″
- Heliocentric radial velocity
- 5661 ± 2 km/s
- Distance
- 87.99 ± 10.45 Mly (26.978 ± 3.205 Mpc )
- Apparent magnitude v
- 13.4g
- Type
- SAB(r)c
- Size
- ~80,900 ly (24.81 kpc ) (estimated)
- Apparent size v
- 1.94′ × 1.34′
via Wikipedia infobox
Wikidata facts
- Instance of
- spiral galaxy
- Constellation
- Cetus
- Distance from Earth
- 78.9
- Image
- NGC 0309 SDSS.jpg
Show 11 more facts
- time of discovery or invention
- 1877-00-00
- discoverer or inventor
- Wilhelm Tempel
- catalog code
- LEDA 3377
- redshift
- 0.018886
- apparent magnitude
- 15.099
- galaxy morphological type
- ScI
- Commons category
- NGC 309
- right ascension
- 14.1777667
- declination
- -9.9139167
- radial velocity
- 5595
- epoch
- J2000.0
Sources (1)
via Wikidata · CC0
~1 min read
Encyclopedic overview
NGC 309 is a spiral galaxy in the constellation Cetus. Its velocity with respect to the cosmic microwave background is 5343 ± 22 km/s, which corresponds to a Hubble distance of 257.0 ± 18.0 Mly (78.81 ± 5.53 Mpc). However, nine non-redshift measurements give a much closer distance of 87.99 ± 10.45 Mly (26.978 ± 3.205 Mpc). It was discovered in 1876 by Wilhelm Tempel.
NGC 309 and NGC 309A are listed together as Holm 27 in Erik Holmberg's A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems, published in 1937.
Excerpted from Wikipedia’s “NGC 309” article, available under the CC BY-SA 4.0 licence.