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]

NGC 684
NGC 684 (SDSS)
Observation data (J2000.0 epoch)
Constellation	Triangulum
Right ascension	01h 50m 14.02s [1]
Declination	+27° 38′ 44.4″ [1]
Redshift	0.011791 [1]
Helio radial velocity	3535 ± 1 km/s [1]
Distance	135 Mly[1]
Apparent magnitude (V)	12.50 [2]
Apparent magnitude (B)	13.30 [2]
Characteristics
Type	Sb
Apparent size (V)	3.2 x 0.6 [1]
Other designations
IC 165, MCG +4-5-17, PGC 6759

See also

• Spiral galaxy
• List of NGC objects (1–1000)
• Triangulum (constellation)

References

External links

• Media related to NGC 684 at Wikimedia Commons
• NGC 684 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
• SEDS

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