NGC 684

NGC 684
NGC 684 (SDSS)
Observation data (J2000.0 epoch)
ConstellationTriangulum
Right ascension01h 50m 14.02s [1]
Declination+27° 38′ 44.4″ [1]
Redshift0.011791 [1]
Heliocentric radial velocity3535 ± 1 km/s [1]
Distance135 Mly[1]
Apparent magnitude (V)12.50 [2]
Apparent magnitude (B)13.30 [2]
Characteristics
TypeSb
Apparent size (V)3.2 x 0.6 [1]
Other designations
IC 165, MCG +04-05-017, PGC 6759

NGC 684 is a spiral galaxy approximately 135 million light-years away from Earth in the constellation of Triangulum.[1] It was discovered by William Herschel on October 26, 1786.[3] Edward Swift, Lewis' son, found this galaxy again on 18 Jan 1890 while "searching for Swift's Comet." and it was reported as a new object in list IX-6.[3]

One supernova has been observed in NGC 684: SN 2021ass (type II, mag. 18.1).[4]

NGC 684 (SDSS)

See also

References

  1. ^ a b c d e f g "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 4 December 2017.
  2. ^ a b "Revised NGC Data for NGC 684". spider.seds.org. Retrieved December 9, 2017.
  3. ^ a b "Data for NGC 684". www.astronomy-mall.com. Retrieved December 9, 2017.
  4. ^ "SN 2021ass". Transient Name Server. IAU. Retrieved 4 September 2024.


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