Astronomy:NGC 797

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NGC 797
NGC 797 imaged by Pan-STARRS
Observation data (J2000 epoch)
ConstellationAndromeda
Right ascension 02h 03m 27.9624s[1]
Declination+38° 07′ 00.823″[1]
Redshift0.018860±0.0000130[1]
Helio radial velocity5,654±4 km/s[1]
Distance369.64 ± 4.35 Mly (113.333 ± 1.333 Mpc)[1]
Group or clusterCGPG 0200.4+3753
Apparent magnitude (V)13.1[1]
Characteristics
TypeSAB(s)a[1]
Size~210,400 ly (64.51 kpc) (estimated)[1]
Apparent size (V)1.9′ × 1.4′[1]
Other designations
CGPG 0200.4+3753 NED02, NGC 797 NED02, UGC 1541, MCG+06-05-078 NED02, PGC 7832[1]

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).[1] However, three non-redshift measurements give a much farther mean distance of 369.64 ± 4.35 Mly (113.333 ± 1.333 Mpc).[2] It was discovered by German-British astronomer William Herschel on 21 September 1786.[3][4]

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.[5] The companion galaxy is catalogued as NGC 0797 NED01 and PGC 212899, among other designations.

NGC 797 and NGC 801 form a galaxy pair, and the distance between the two is about 150 kiloparsecs.[6]

Supernova

One supernova has been observed in NGC 797:

  • SN 2025pel (Type Ia, mag. 18.41) was discovered by GOTO on 17 June 2025.[7]

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 0797 NED02". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+0797+NED02. 
  2. ↑ "Distance Results for NGC 0797 NED02". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+0797+NED02. 
  3. ↑ Herschel, W. (1789). "Catalogue of a Second Thousand of New Nebulae and Clusters of Stars; with a Few Introductory Remarks on the Construction of the Heavens". Philosophical Transactions of the Royal Society of London 79: 212–255. doi:10.1098/rstl.1789.0021. Bibcode: 1789RSPT...79..212H. 
  4. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 797". https://cseligman.com/text/atlas/ngc7a.htm#797. 
  5. ↑ Zwicky, Fritz; Zwicky, Margrit A. (1971). Catalogue of selected compact galaxies and of post-eruptive galaxies. Bibcode: 1971cscg.book.....Z. 
  6. ↑ Van Moorsel, G. A. (1983). "Neutral hydrogen observations of double spiral galaxies. III. NGC 3504/3512, NGC 4085/4088, IC 65/UGC 622, NGC 797/801". Astronomy and Astrophysics Supplement Series 54: 1. Bibcode: 1983A&AS...54....1V. 
  7. ↑ "SN 2025pel". IAU. https://www.wis-tns.org/object/2025pel. 

Coordinates: Sky map 02h 03m 27.9624s, +38° 07′ 00.823″



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