Hellenica World

Messier 91

Spiral Galaxy M91. Image courtesy of NOT

Messier 91
Observation data (J2000 epoch)
Constellation Coma Berenices
Right ascension 12h 35m 26.4s[1]
Declination +14° 29′ 47″[1]
Redshift 486 ± 4 km/s[1]
Distance 63 ± 16 Mly (19 ± 5 Mpc)[2]
Type SBb(rs)[1]
Apparent dimensions (V) 5′.4 × 4′.3[1]
Apparent magnitude (V) 11.0[1]
Other designations
NGC 4548,[1] UGC 7753,[1] PGC 41934[1]
See also: Galaxy, List of galaxies

Messier 91 (also known as NGC 4548) is a barred spiral galaxy about 63 million light-years away in the constellation Coma Berenices. It was most probably discovered by Charles Messier in 1781 and independently rediscovered by William Herschel on April 8, 1784. M91 is a member of the Virgo Cluster of galaxies.


* SEDS Messier: Spiral Galaxy M91

* Wikisky.org: SDSS image, M91


1. ^ a b c d e f g h i NASA/IPAC Extragalactic Database. Results for NGC 4548. Retrieved on 2006-12-13.

2. ^ J. L. Tonry, A. Dressler, J. P. Blakeslee, E. A. Ajhar, A. B. Fletcher, G. A. Luppino, M. R. Metzger, C. B. Moore (2001). "The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances". Astrophysical Journal 546 (2): 681-693. doi:10.1086/318301.

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