Astronomy:NGC 6195

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NGC 6195
NGC 6195 imaged by SDSS
Observation data (J2000 epoch)
ConstellationHercules
Right ascension 16h 36m 32.5835s[1]
Declination+39° 01′ 40.475″[1]
Redshift0.029986±0.00000861[1]
Helio radial velocity8,990±3 km/s[1]
Distance466.40 ± 13.64 Mly (143.000 ± 4.183 Mpc)[1]
Group or clusterAbell 2199
Apparent magnitude (V)14.0g[1]
Characteristics
TypeSb[1]
Size~217,100 ly (66.56 kpc) (estimated)[1]
Apparent size (V)1.48′ × 0.83′[1]
Other designations
IRAS F16348+3907, UGC 10469, MCG+07-34-118, PGC 58596[1]

NGC 6195 is a large spiral galaxy in the constellation of Hercules. Its velocity with respect to the cosmic microwave background is 9,005±3 km/s, which corresponds to a Hubble distance of 433.2 ± 30.3 Mly (132.82 ± 9.30 Mpc).[1] Additionally, four non-redshift measurements give a farther mean distance of 466.40 ± 13.64 Mly (143.000 ± 4.183 Mpc).[2] It was discovered by German-British astronomer William Herschel on 30 May 1791.[3][4]

NGC 6195 is a Seyfert I galaxy, i.e. it has a quasar-like nucleus with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.[5][6] It is also a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[7][6]

Abell 2199 cluster

NGC 6195 is a member of the galaxy cluster Abell 2199.[8]

Supernova

One supernova has been observed in NGC 6195:

  • SN 1975K (type unknown, mag. 17.8) was discovered by American astronomer Charles Kowal on 9 August 1975.[9][10]

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 6195". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+6195. 
  2. ↑ "Distance Results for NGC 6195". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+6195. 
  3. ↑ Herschel, William (1802). "Catalogue of 500 New Nebulae, Nebulous Stars, Planetary Nebulae, and Clusters of Stars; with Remarks on the Construction of the Heavens". Philosophical Transactions of the Royal Society of London 92: 477–528. doi:10.1098/rstl.1802.0021. Bibcode: 1802RSPT...92..477H. 
  4. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 6195". https://cseligman.com/text/atlas/ngc61a.htm#6195. 
  5. ↑ Albán, M.; Wylezalek, D. (2023). "Classifying the full SDSS-IV MaNGA Survey using optical diagnostic diagrams: Presentation of AGN catalogs in flexible apertures". Astronomy and Astrophysics 674: A85. doi:10.1051/0004-6361/202245437. Bibcode: 2023A&A...674A..85A. 
  6. ↑ 6.0 6.1 "NGC 6195". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+6195. 
  7. ↑ Toba, Y.; Oyabu, S.; Matsuhara, H.; Malkan, M. A.; Gandhi, P.; Nakagawa, T.; Isobe, N.; Shirahata, M. et al. (2014). "Luminosity and Redshift Dependence of the Covering Factor of Active Galactic Nuclei viewed with WISE and Sloan Digital Sky Survey". The Astrophysical Journal 788 (1): 45. doi:10.1088/0004-637X/788/1/45. Bibcode: 2014ApJ...788...45T. 
  8. ↑ "ACO 2199". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=ACO+2199. 
  9. ↑ Kowal, C.; Huchra, J.; Sargent, W. L. W. (1976). "The 1975 Palomar supernova search". Publications of the Astronomical Society of the Pacific 88: 521. doi:10.1086/129978. Bibcode: 1976PASP...88..521K. 
  10. ↑ "SN 1975K". IAU. https://www.wis-tns.org/object/1975K. 

Coordinates: Sky map 16h 36m 32.5835s, +39° 01′ 40.475″



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