Key facts
- Constellation
- Eridanus
- Right ascension
- 04 43 43.9330
- Declination
- −05 ° 19 ′ 09.562 ″
- Redshift
- 0.016 261 ± 0.000 009 00
- Heliocentric radial velocity
- 4,875 ± 3 km/s
- Distance
- 232.5 ± 16.3 Mly (71.30 ± 4.99 Mpc )
- Type
- SB(r)bc pec
- Size
- ~75,100 ly (23.02 kpc ) (estimated)
- Apparent size v
- 1.1′ × 1.1′
via Wikipedia infobox
~1 min read
Encyclopedic overview
NGC 1643 is a peculiar barred spiral galaxy in the constellation of Eridanus. Its velocity with respect to the cosmic microwave background is 4,834±4 km/s, which corresponds to a Hubble distance of 232.5 ± 16.3 Mly (71.30 ± 4.99 Mpc). It was discovered by German-British astronomer William Herschel on 28 November 1786.
Supernovae
Excerpted from Wikipedia’s “NGC 1643” article, available under the CC BY-SA 4.0 licence.
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