GR 8 (galaxy) explained

GR 8
Type:	ImV^[1]
Epoch:	J2000
Dist Ly:	7.9 Mly (2.4 Mpc)
Z:	214 ± 0 km/s
Appmag V:	14.7
Size V:	1′.1 × 1′.0
Constellation Name:	Virgo
Names:	PGC 44491, DDO 155, GR 8, Imprint of a Foot

GR 8 (also known as UGC 8091) is a gas-rich dwarf irregular galaxy.^[2] In 1995, Tolstoy et al. estimated its distance (with the Hipparcos correction of 1997 applied) to be approximately from Earth. It is around 2.8 Mly from UGC 9128.^[3] It is still an open question whether it is a member of the Local Group or possibly the Virgo Cluster.^[4]

GR 8 was discovered at the Lick Observatory using the 20-inch astrograph in either 1946, 1947, or 1951.

External links

• Irregular Galaxy GR 8: Footprint Galaxy
• DDO 155 picture (almost halfway down page)

Notes and References

1. Web site: NASA/IPAC Extragalactic Database . Results for UGC 8091 . 2007-03-15.
2. Book: Tolstoy, Eline . Detailed Star-Formation Histories of Nearby Dwarf Irregular Galaxies using HST . The stellar content of Local Group galaxies, Proceedings of the 192nd symposium of the International Astronomical Union . 1999 . 192 . 218 . 1999IAUS..192..218T . 1886733821 . . Patricia Whitelock . Russell Cannon .
3. Aparicio, Tikhonov, & Karachentsev, DDO 187 . 8 August 2021 . 10.1086/301157. 15309075 . astro-ph/9909493 . Aparicio . A. . Tikhonov . N. . Karachentsev . I. . 1999 .
4. Web site: GR 8 . 2023-04-30 . spider.seds.org.