NGC 673
Galaxy in the constellation Aries
NGC 673 is an intermediate spiral galaxy in the constellation of Aries. Its velocity with respect to the cosmic microwave background is 4894 ± 20 km/s, which corresponds to a Hubble distance of 235.4 ± 16.5 Mly (72.18 ± 5.06 Mpc). In addition, 31 non redshift measurements give a closer distance of 206.09 ± 5.54 Mly (63.187 ± 1.699 Mpc). The galaxy was discovered by German-British astronomer William Herschel on 4 September 1786.
According to A.M. Garcia, NGC 673 is the namesake of the NGC 673 Group (also known as LGG 31). This group contains at least 17 galaxies, including IC 156, IC 162, NGC 665, NGC 677, NGC 683, and 11 galaxies from the UGC catalogue.
01Supernovae
Two supernovae have been observed in NGC 673:
- British amateur astronomer Mark Armstrong, K. Okazaki, Kahoku-machi, and Yamagata-ken discovered SN 1996bo (Type Ia, mag. 16.5) on 18 October 1996.
- LOTOSS (Lick Observatory and Tenagra Observatory Supernova Searches) discovered SN 2001fa (Type IIn, mag. 16.9) on 18 October 2001.
Sources and credits
This article is adapted from the Wikipedia article “NGC 673”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
Images, from Wikimedia Commons:
- NGC673 - SDSS DR14.jpg by Sloan Digital Sky Survey, CC BY 4.0
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