NGC 673

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)

References

External links