NGC 1491 is an older, evolved HII region ionised by the O5 star BD +50 886
. SIMBAD gives a slightly cooler O6 class for this star.
Contains the infrared star cluster [BDS2003] 62
A very good visual frequency image of this nebula is available here
and a recent WISE infrared image here
(Sh 2-206 (NGC 1491) is on the right).
This older, evolved HII region is excited by the O5 star BD +50 886 and is located at a distance of 3700 pc. [1
Contains the infrared cluster [BDS2003] 62 at a distance of 3300 pc. [2
1. ^ Deharveng, L., Israel, F. P., & Maucherat, M. (1976). "Optical and radio
observations of the galactic H II region S 206 /NGC 1491/", Astronomy and
Astrophysics, Vol. 48, 63-73. [1976A&A....48...63D]
2. ^ Bica, E., Dutra, C. M., Soares, J., et al. (2003). "New infrared star
clusters in the Northern and Equatorial Milky Way with 2MASS", Astronomy
and Astrophysics, Vol. 404, 223-232. [2003A&A...404..223B]