NGC 721
Pan-STARRS image of NGC 721
Observation data (J2000 epoch)
Constellation	Andromeda
Right ascension	01h 54m 45.45687s[1]
Declination	+39° 23′ 00.7702″[1]
Redshift	0.018566[2]
Heliocentric radial velocity	5514 km/s[2]
Distance	182.6 Mly (55.98 Mpc)[3]
Apparent magnitude (B)	13.8[2]
Characteristics
Type	SB(rs)bc[4]
Other designations
UGC 1376, MCG 06-05-043, PGC 7097[2]

NGC 721 is a barred spiral galaxy located in the constellation Andromeda about 250 million light years from the Milky Way. It was discovered by the Prussian astronomer Heinrich d'Arrest in 1862.^[5][6][7]

1. ^ ^{a b} Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
2. ^ ^{a b c d} "NGC 721". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-05-20.
3. ^ Tully, R. Brent; Courtois, Hélène M.; Sorce, Jenny G. (2016). "Cosmicflows-3". The Astronomical Journal. 152 (2): 21. arXiv:1605.01765. Bibcode:2016AJ....152...50T. doi:10.3847/0004-6256/152/2/50. S2CID 250737862. 50.
4. ^ "Results for object NGC 0721 (NGC 721)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2020-05-24.
5. ^ Ford, Dominic. "The galaxy NGC 721 - In-The-Sky.org". in-the-sky.org. Retrieved 2020-04-09.
6. ^ "Revised NGC Data for NGC 721". spider.seds.org. Retrieved 2020-04-09.
7. ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2020-04-09.

This spiral galaxy article is a stub. You can help Wikipedia by expanding it.

• v
• t
• e