Right ascension 12 30 36.2 Redshift 565 ± 3 km/s Apparent size (V) 6′.3 × 3′.1 | Declination 41° 38′ 38″ Type SB(s)d pec Magnitude 9.8 Apparent magnitude (V) 9.8 | |
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Distance 25.1 ± 5.0 Mly (7.7 ± 1.5 Mpc) Similar NGC 4244, NGC 4656 and NGC, NGC 4449, NGC 4631, NGC 4214 | ||
NGC 4490, also known as the Cocoon Galaxy, is a barred spiral galaxy in the constellation Canes Venatici. It lies at a distance of 25 million light years from Earth. It interacts with its smaller companion NGC 4485 and as a reasult is a starburst galaxy. The NGC 4490 is NGC 4485 pair is mentioned in the Atlas of Peculiar Galaxies as Arp 269. NGC 4490 is located 3/4° northwest of beta Canum Venaticorum and with apparent visual magnitude 9.8, can be observed with 15x100 binoculars. It is a member of Herschel 400 Catalogue. It belonds in Canes Venatici galaxy cloud II.
It was discovered by William Herschel in 1788. Two supernovae have been observed in NGC 4490, SN 1982F, and type II-P SN 2008ax, with peak magnitude 16.1.
References
NGC 4490 Wikipedia(Text) CC BY-SA