Astronomy:NGC 1659

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NGC 1659
NGC 1659 imaged by SDSS
Observation data (J2000 epoch)
ConstellationEridanus
Right ascension 04h 46m 29.9333s[1]
Declination−04° 47′ 19.812″[1]
Redshift0.015581±0.0000190[1]
Helio radial velocity4,671±6 km/s[1]
Distance142.92 ± 19.01 Mly (43.818 ± 5.828 Mpc)[2]
Group or clusterNGC 1667 group (LGG 118)[3]
Apparent magnitude (V)13.14[1]
Characteristics
TypeSA(r)bc pec[1]
Size~72,700 ly (22.28 kpc) (estimated)[1]
Apparent size (V)1.6′ × 1.1′[1]
Other designations
IRAS 04440-0452, NGC 1677, MCG-01-13-006, PGC 15977[1][4]

NGC 1659 is a peculiar spiral galaxy in the constellation of Eridanus. Its velocity with respect to the cosmic microwave background is 4,634±6 km/s, which corresponds to a Hubble distance of 222.9 ± 15.6 Mly (68.35 ± 4.79 Mpc).[1] However, 11 non-redshift measurements give a much closer mean distance of 142.92 ± 19.01 Mly (43.818 ± 5.828 Mpc).[2] It was discovered by German-British astronomer William Herschel on 28 November 1786.[5] The galaxy was also observed by American astronomer Lewis Swift on 22 October 1886, and listed as NGC 1677.[4][lower-alpha 1]

NGC 1659 is a Seyfert II 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.[7][8]

NGC 1667 group

NGC 1659 is a member of the NGC 1667 galaxy group (also known as LGG 118). This group contains at least nine galaxies, including NGC 1645 (fr), NGC 1667, IC 387 (fr), IC 2097 (fr), IC 2101 (fr), MCG -01-13-012 (d), PGC 15779 (d) and PGC 16061 (d).[3][9]

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 "Results for object NGC 1659". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+1659. 
  2. ↑ 2.0 2.1 "Distance Results for NGC 1659". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+1659. 
  3. ↑ 3.0 3.1 Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series 100: 47. Bibcode: 1993A&AS..100...47G. 
  4. ↑ 4.0 4.1 4.2 Seligman, Courtney. "New General Catalogue Objects: NGC 1677". https://cseligman.com/text/atlas/ngc16a.htm#1677. 
  5. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 1659". https://cseligman.com/text/atlas/ngc16a.htm#1659. 
  6. ↑ Seligman, Courtney. "Index Catalogue Objects: IC 2099". https://cseligman.com/text/atlas/ic20a.htm#ic2099. 
  7. ↑ Chen, Yan-Ping; Zaw, Ingyin; Farrar, Glennys R.; Elgamal, Sana (2022). "A Uniformly Selected, Southern-sky 6dF, Optical AGN Catalog". The Astrophysical Journal Supplement Series 258 (2): 29. doi:10.3847/1538-4365/ac4157. Bibcode: 2022ApJS..258...29C. 
  8. ↑ "NGC 1659". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+1659. 
  9. ↑ "LGG 118". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LGG+118. 

Notes

  1. ↑ Both SIMBAD and NED list NGC 1677 as being the same galaxy as IC 2099 (de), but this is an error introduced with the RNGC.[6][4]

Coordinates: Sky map 04h 46m 29.9333s, −04° 47′ 19.812″



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