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
Wikidata facts
- Instance of
- spiral galaxy
- Constellation
- Eridanus
- Distance from Earth
- 65.85
- Image
- NGC 1643.png
Show 11 more facts
- catalog code
- Gaia DR2 3200278027440619904
- galaxy morphological type
- Sb
- discoverer or inventor
- William Herschel
- time of discovery or invention
- 1786-11-28
- apparent magnitude
- 12.703
- Commons category
- NGC 1643
- right ascension
- 70.93315097519980
- declination
- -5.31944170232330
- radial velocity
- 4873.0
- redshift
- 0.016178
- epoch
- J2000.0
Sources (1)
via Wikidata · CC0
~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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