Astronomy:NGC 3318

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NGC 3318
NGC 3318 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationVela
Right ascension 10h 37m 15.5036s[1]
Declination−41° 37′ 38.859″[1]
Redshift0.009255±0.000021[1]
Helio radial velocity2,775±6 km/s[1]
Distance122.47 ± 2.40 Mly (37.550 ± 0.735 Mpc)[1]
Group or clusterNGC 3318 group (LGG 199)
Apparent magnitude (V)12.19[1]
Characteristics
TypeSAB(rs)b[1]
Size~114,400 ly (35.09 kpc) (estimated)[1]
Apparent size (V)2.4′ × 1.3′[1]
Other designations
ESO 317- G 052, IRAS 10350-4122, MCG-07-22-026, PGC 31533[1]

NGC 3318 is a barred spiral galaxy in the constellation of Vela. Its velocity with respect to the cosmic microwave background is 3,077±22 km/s, which corresponds to a Hubble distance of 148.0 ± 10.4 Mly (45.38 ± 3.19 Mpc).[1] However, 20 non-redshift measurements give a much closer mean distance of 122.47 ± 2.40 Mly (37.550 ± 0.735 Mpc).[2] It was discovered by British astronomer John Herschel on 2 March 1835.[3][4]

NGC 3318 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.[5]

NGC 3318 group

NGC 3318 is part of a galaxy group that bears its name. The NGC 3318 group (also known as LGG 199) has at least 9 galaxies, including NGC 3250, NGC 3250E, NGC 3250B, NGC 3318B, ESO 317-17, ESO 317-19, ESO 317-21, and ESO 317-23.[6]

Supernovae

Three supernovae have been observed in NGC 3318:

  • SN 2000cl (Type IIn, mag. 14.8) was discovered by French amateur astronomer Robin Chassagne (bio-fr) on 26 May 2000.[7][8]
  • SN 2017ahn (Type II, mag. 18.0896) was discovered by the Distance Less Than 40 Mpc Survey (DLT40) on 8 February 2017.[9]
  • SN 2020aze (Type II, mag. 17.1224) was discovered by DLT40 on 26 January 2020.[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 3318". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+3318. 
  2. ↑ "Distance Results for NGC 3318". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+3318. 
  3. ↑ Herschel, John. F. W (1864). "Catalogue of Nebulae and Clusters of Stars". Philosophical Transactions of the Royal Society of London 154: 1–137. doi:10.1098/rstl.1864.0001. Bibcode: 1864RSPT..154....1H. 
  4. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 3318". https://cseligman.com/text/atlas/ngc33.htm#3318. 
  5. ↑ "NGC 3318". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+3318. 
  6. ↑ 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. 
  7. ↑ Chassagne, R.; Maury, A.; Vanzi, L.; Testi, L.; Lidman, C. (2000). "Supernova 2000cl in NGC 3318". International Astronomical Union Circular (7432): 1. Bibcode: 2000IAUC.7432....1C. http://www.cbat.eps.harvard.edu/iauc/07400/07432.html#Item1. 
  8. ↑ "SN 2000cl". IAU. https://www.wis-tns.org/object/2000cl. 
  9. ↑ "SN 2017ahn". IAU. https://www.wis-tns.org/object/2017ahn. 
  10. ↑ "SN 2020aze". IAU. https://www.wis-tns.org/object/2020aze. 

Coordinates: Sky map 10h 37m 15.5036s, −41° 37′ 38.859″



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