NGC 3318

NGC 3318
NGC 3318 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationVela
Right ascension10h 37m 15.5036s
Declination−41° 37′ 38.859″
Redshift0.009255±0.000021
Heliocentric radial velocity2,775±6 km/s
Distance122.47 ± 2.40 Mly (37.550 ± 0.735 Mpc)
Group or clusterNGC 3318 group (LGG 199)
Apparent magnitude (V)12.19
Characteristics
TypeSAB(rs)b
Size~114,400 ly (35.09 kpc) (estimated)
Apparent size (V)2.4′ × 1.3′
Other designations
ESO 317- G 052, IRAS 10350-4122, MCG -07-22-026, PGC 31533

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). However, 20 non-redshift measurements give a much closer mean distance of 122.47 ± 2.40 Mly (37.550 ± 0.735 Mpc). It was discovered by British astronomer John Herschel on 2 March 1835.

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.

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.

Supernovae

Three supernovae have been observed in NGC 3318:

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 "Results for object NGC 3318". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 4 August 2025.
  2. ↑ "Distance Results for NGC 3318". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 4 August 2025.
  3. ↑ Herschel, John. F. W (1864). "Catalogue of Nebulae and Clusters of Stars". Philosophical Transactions of the Royal Society of London. 154: 1–137. Bibcode:1864RSPT..154....1H. doi:10.1098/rstl.1864.0001.
  4. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 3318". Celestial Atlas. Retrieved 4 August 2025.
  5. ↑ "NGC 3318". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 4 August 2025.
  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.
  8. ↑ "SN 2000cl". Transient Name Server. IAU. Retrieved 4 August 2025.
  9. ↑ "SN 2017ahn". Transient Name Server. IAU. Retrieved 4 August 2025.
  10. ↑ "SN 2020aze". Transient Name Server. IAU. Retrieved 4 August 2025.