NGC 5939

NGC 5939
The spiral galaxy NGC 5939.
Observation data (J2000 epoch)
ConstellationUrsa Minor
Right ascension15h 24m 46.03s[1]
Declination+68° 43′ 50.3″[1]
Redshift0.022235 [1]
Heliocentric radial velocity6666 ± 4 km/s[1]
Distance321.6 ± 22.5 Mly (98.59 ± 6.90 Mpc)[1]
Apparent magnitude (V)13.1[1]
Characteristics
TypeS?[1]
Size~102,500 ly (31.44 kpc) (estimated)[1]
Apparent size (V)0.9' x 0.5'[1]
Other designations
IRAS 15244+6854, 2MASX J15244604+6843501, UGC 9854, MCG +12-15-007, PGC 55022, CGCG 338-008[1]

NGC 5939 is a spiral galaxy in the constellation of Ursa Minor. Its velocity with respect to the cosmic microwave background is 6684 ± 4 km/s, which corresponds to a Hubble distance of 98.59 ± 6.90 Mpc (∼322 million light-years).[1] It was discovered by American astronomer Lewis Swift on 11 July 1883.[2]

Supernovae

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Three supernovae have been observed in NGC 5939: SN 2004ax (type Ib/c, mag. 17.7),[3][4] SN 2019gss (type II, mag. 19.3),[5] and SN 2023gps (type Ia, mag. 20).[6]

NGC 5939 Group

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NGC 5939 is part of a trio of galaxies: The other two galaxies in the group are IC 1129 and UGC 9896.[7]

See also

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References

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  1. ^ a b c d e f g h i j k "NASA/IPAC Extragalactic Database". Results for NGC 5939. Retrieved 10 August 2024.
  2. ^ Seligman, Courtney. "NGC 5939". Celestial Atlas. Retrieved 10 August 2024.
  3. ^ "Transient Name Server". Entry for SN 2004ax. Retrieved 10 August 2024.
  4. ^ Green, Daniel W. E. (April 24, 2004). "Central Bureau for Astronomical Telegrams". Circular No. 8331. Retrieved 8 August 2024.
  5. ^ "Transient Name Server". Entry for SN 2019gss. Retrieved 10 August 2024.
  6. ^ "Transient Name Server". Entry for SN 2023gps. Retrieved 10 August 2024.
  7. ^ Mahtessian, Abraham (July 1998). "Groups of galaxies. III. Some empirical characteristics" (PDF). Astrophysics. 41 #3: 308–321. doi:10.1007/BF03036100. Retrieved 10 August 2024.
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