NGC 819
NGC 819 (SDSS)
Observation data (J2000.0 epoch)
Constellation	Triangulum
Right ascension	02h 08m 34.40s [1]
Declination	+29° 14′ 03.00″ [1]
Redshift	0.021935 [1]
Heliocentric radial velocity	6576 ± 10 km/s [1]
Distance	302 Mly
Apparent magnitude (V)	13.40 [2]
Apparent magnitude (B)	14.30 [2]
Characteristics
Type	S? [1]
Apparent size (V)	0.6 x 0.4 [2]
Other designations
IRAS 02056+2859, UGC 1632, PGC 8174, CGCG 504-017

NGC 819 is a spiral galaxy approximately 302 million light-years away from Earth in the constellation of Triangulum.^[1][3] It forms a visual pair with the galaxy NGC 816 [fr] 5.7' WNW.^[4]

Discovery

NGC 819 was discovered by German astronomer Heinrich Louis d'Arrest on September 20, 1865 with the 11-inch refractor at Copenhagen.^[4] Édouard Stephan independently found the galaxy again on September 15, 1871 with the 31" reflector at Marseille Observatory.^[4]

Supernovae

Four supernovae have been observed in NGC 819:

• SN 2007hb (Type Ib/c, mag. 19.5) was discovered by Nearby Supernova Factory on August 24, 2007.^[5][6] It was located at RA 02^h 08^m 34.0^s, DEC +29° 14′ 14″, J2000.0.^[6][1]
• SN 2016hkn (Type II, mag. 17.2) was discovered by Paolo Campaner on October 22, 2016.^[7] It was located at RA 02^h 08^m 34.23^s, DEC +29° 14′ 11.1″.^[7][1]
• SN 2020mbe (Type Ic, mag. 18.6) was discovered by Gaia Photometric Science Alerts on January 10, 2020.^[8]
• SN 2026fau (Type II, mag. 18.5942) was discovered by the Zwicky Transient Facility on March 7, 2026.^[9]

See also

• List of NGC objects (1–1000)

References

External links

Wikimedia Commons has media related to NGC 819.

• NGC 819 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
• SEDS