NGC 918

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NGC 918
N918s.jpg
NGC 918 by the Mount Lemmon SkyCenter
Observation data (J2000 epoch)
Constellation Aries
Right ascension 02h 25m 50.7648s [1]
Declination +18° 29′ 46.987″ [1]
Redshift 0.005037 [1]
Heliocentric radial velocity 1510 ± 1 km/s [1]
Distance 20.6±1.5 mpc [2]
Apparent magnitude  (V)15.01 [3]
Apparent magnitude  (B)16.0 [3]
Characteristics
Type SAB(rs)c [1]
Size~70,500  ly (21.63  kpc) (estimated) [1]
Apparent size  (V)3.5′ × 2.0′ [1]
Other designations
IRAS 02230+1816, UGC 1888, MCG +03-07-011, PGC 9236, CGCG 462-011 [3] [1]

NGC 918 is a barred spiral galaxy in the constellation Aries, about 67 million light years from the Milky Way. It was discovered by John Herschel on Jan 11, 1831. [4]

Contents

The brightness class of NGC 918 is III and it has a broad line of neutral hydrogen. NGC 918 is also an active nucleus galaxy (AGN). Moreover, it is a field galaxy which does not belong to a cluster or group and is therefore gravitationally isolated. [5]

Many non-redshift measures give a distance of 19,115 ± 6,160 Mpc (~62,3 million ly), [6] which is within the distances calculated using the value shift. [2]

Supernovae

Two supernovae have been observed in NGC 918:

NGC 918 and dust clouds within our Milky Way with the 10th data release of the Legacy Survey. NGC 918 legacy dr10.jpg
NGC 918 and dust clouds within our Milky Way with the 10th data release of the Legacy Survey.

See also

References

  1. 1 2 3 4 5 6 7 8 "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 19 June 2019.
  2. 1 2 We obtain the distance that separates us from a galaxy using Hubble's law: v = Hod, where Ho is the Hubble constant (70 ± 5 (km / s) / Mpc). The relative uncertainty Δd / d over the distance is equal to the sum of the relative uncertainties of the velocity and Ho.
  3. 1 2 3 "NGC 918". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 19 June 2019.
  4. ↑ Seligman, Courtney. "New General Catalog Objects: NGC 900 - 949". New General Catalog Objects: NGC 900 - 949. Retrieved 19 June 2019.
  5. ↑ "Your NED Search Results". ned.ipac.caltech.edu.
  6. ↑ "NED Query Results for NGC 918". ned.ipac.caltech.edu.
  7. ↑ Nakano, S.; Itagaki, K.; Yusa, T. (2009). "Supernova 2009js in NGC 918". Central Bureau Electronic Telegrams. 1969: 1. Bibcode:2009CBET.1969....1N.
  8. ↑ "SN 2009js". Transient Name Server. IAU . Retrieved 30 May 2025.
  9. ↑ "APOD: 2009 November 12 - Art and Science in NGC 918".
  10. 1 2 Gandhi, P.; Yamanaka, M.; Tanaka, M.; Nozawa, T.; Kawabata, K. S.; Saviane, I.; Maeda, K.; Moriya, T. J.; Hattori, T.; Sasada, M.; Itoh, R. (2013). "SN 2009js at the Crossroads between Normal and Subluminous Type IIP Supernovae: Optical and Mid-infrared Evolution". The Astrophysical Journal. 767 (2): 166. arXiv: 1303.1565 . Bibcode:2013ApJ...767..166G. doi:10.1088/0004-637X/767/2/166. S2CID   54036464.
  11. ↑ "Supernova 2009js in NGC 918". www.rochesterastronomy.org.
  12. ↑ Nakano, S.; Yamaoka, H.; Kadota, K.; Tsuboi, M.; Balam, D. D.; Graham, M. L.; Hsiao, E. Y.; Green, D. W. E. (2011). "Supernova 2011ek near NGC 918 = PSN J02254889+1832000". Central Bureau Electronic Telegrams. 2783: 1. Bibcode:2011CBET.2783....1N.
  13. ↑ "SN 2011ek". Transient Name Server. IAU . Retrieved 30 May 2025.
  14. ↑ "Supernova 2011ek in NGC 918". www.rochesterastronomy.org.
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