Astronomical data · SIMBAD
- Object type
- G
- Redshift
- z = 0.01884
- Morphology
- SBa/Sa
- Coordinates
- RA 30.8671° · Dec 38.1170°
via SIMBAD · CDS Strasbourg
Key facts
- Constellation
- Andromeda
- Right ascension
- 02 03 27.9624
- Declination
- +38 ° 07 ′ 00.823 ″
- Redshift
- 0.018 860 ± 0.000 0130
- Heliocentric radial velocity
- 5,654 ± 4 km/s
- Distance
- 369.64 ± 4.35 Mly (113.333 ± 1.333 Mpc )
- Group or cluster
- CGPG 0200.4+3753
- Type
- SAB(s)a
- Size
- ~210,400 ly (64.51 kpc ) (estimated)
- Apparent size v
- 1.9′ × 1.4′
via Wikipedia infobox
~1 min read
Encyclopedic overview
NGC 797 (also known as NGC 797 NED02) is a barred spiral galaxy in the constellation of Andromeda. Its velocity with respect to the cosmic microwave background is 5,414±17 km/s, which corresponds to a Hubble distance of 260.4 ± 18.3 Mly (79.85 ± 5.60 Mpc). However, three non-redshift measurements give a much farther mean distance of 369.64 ± 4.35 Mly (113.333 ± 1.333 Mpc). It was discovered by German-British astronomer William Herschel on 21 September 1786.
In 1971, Fritz Zwicky and his daughter, Margrit A. Zwicky, published Catalogue of Selected Compact Galaxies and of Post-Eruptive Galaxies, which showed that NGC 797 has an elliptical compact companion galaxy at the tip of its southwest spiral arm, and catalogued the galaxy pair as CGPG 0200.4+3753. The companion galaxy is catalogued as NGC 0797 NED01 and PGC 212899, among other designations.
Excerpted from Wikipedia’s “NGC 797” article, available under the CC BY-SA 4.0 licence.