NGC673 is an intermediate spiral galaxy in the constellation of Aries. Its velocity with respect to the cosmic microwave background is 4894 ± 20km/s, which corresponds to a Hubble distance of . In addition, 31 non redshift measurements give a closer distance of . 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 , , NGC 665, NGC 677, , and 11 galaxies from the UGC catalogue.
Supernovae Two supernovae have been observed in NGC 673: British amateur astronomer Mark Armstrong, K. Okazaki, Kahoku-machi, and Yamagata-ken discovered SN1996bo (TypeIa, mag. 16.5) on 18 October 1996. LOTOSS (Lick Observatory and Tenagra Observatory Supernova Searches) discovered SN2001fa (TypeIIn, mag. 16.9) on 18 October 2001.
See also List of NGC objects (1–1000)
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