NGC 918 - Misplaced Pages

Barred spiral galaxy in the constellation Aries

NGC 918
NGC 918 by the Mount Lemmon SkyCenter
Observation data (J2000 epoch)
Constellation	Aries
Right ascension	02 25 50
Declination	+18° 29′ 46″
Redshift	0.005027
Heliocentric radial velocity	1507 ± 3 km/s
Distance	20.6±1.5 mpc
Apparent magnitude (V)	15.01
Apparent magnitude (B)	16.0
Characteristics
Type	SAB(rs)c
Other designations
NGC 918,MCG+03-07-011, LEDA 9236

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.

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; that is to say, it does not belong to a cluster or group and is therefore gravitationally isolated.

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

Two supernovae have been observed in this galaxy. SN 2009js (type II, mag. 17.2) was discovered on October 11, 2009. This was the first subluminous supernova to be studied in infrared wavelengths. Supernova SN 2011ek (type Ia, mag. 16.4) was discovered on Aug. 4, 2011 by Kōichi Itagaki.

References

^ "NGC 918". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 June 2019.
^ "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 19 June 2019.
^ 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.
Seligman, Courtney. "New General Catalog Objects: NGC 900 - 949". New General Catalog Objects: NGC 900 - 949. Retrieved 19 June 2019.
^ "Your NED Search Results". ned.ipac.caltech.edu.
"NED Query Results for NGC 918". ned.ipac.caltech.edu.
"APOD: 2009 November 12 - Art and Science in NGC 918".
SN 2009js at the Crossroads between Normal and Subluminous Type IIP Supernovae: Optical and Mid-infrared Evolution, The Astrophysical Journal, Volume 767, Issue 2, article id. 166, 15 pp. (2013).
"Supernova 2009js in NGC 918". www.rochesterastronomy.org.
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.
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.
"Supernova 2011ek in NGC 918". www.rochesterastronomy.org.

External links

Media related to NGC 918 at Wikimedia Commons
NGC 918 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

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Astronomical catalog List of NGC objects 1–1000

New General Catalogue 500 to 999

Constellation of Aries

Stars

Bayer	α (Hamal) β (Sheratan) γ (Mesarthim) δ (Botein) ε ζ η θ ι κ λ μ ν ξ ο π ρ ρ ρ σ τ τ
Flamsteed	1 4 7 10 11 14 15 16 19 20 21 23 26 27 29 30 31 33 35 36 38 39 (Lilii Borea) 40 41 (Bharani) 47 49 50 51 52 53 54 55 56 59 60 62 64 65 66 54 Cet 85 Cet
Variable	TZ UX VZ (16 Tri)
HR	577 728 803 952 999
HD	12661 20367
Other	BD+20°307 HIP 14810 HAT-P-25 Teegarden's Star WASP-11/HAT-P-10 WD 0145+234

Exoplanets	α Arietis b HD 12661 b c HIP 14810 b c d Teegarden's Star b c WASP-11b/HAT-P-10b

Galaxies

NGC	677 680 691 694 695 716 765 770 772 781 803 817 820 821 871 877 900 901 903 904 918 935 938 972 990 992 1024 1134 1156 1168
Other	1ES 0229+200 3C 79 4C +28.07 AO 0235+164 IC 167 IC 1801 PSO J0309+27 Segue 2 UGC 2140

Galaxy clusters	MS 0302+17

Astronomical events	GRB 060218