Gamma Cancri

Gamma Cancri, or γ Cancri, is a star in the northern constellation of Cancer. It is formally named Asellus Borealis /əˈsɛləs bɒriˈælɪs/, the traditional name of the system. Based on parallax measurements, it is located at a distance of approximately 181 light years from the Sun. The star is drifting further away with a radial velocity of 29 km/s. In 1910 this star was reported to be a spectroscopic binary by O. J. Lee, but is now considered a single star. Since it is near the ecliptic, it can be occulted by the Moon and, very rarely, by planets.

Gamma Cancri
Location of γ Cancri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cancer
Right ascension 08h 43m 17.14820s
Declination +21° 28 06.6008
Apparent magnitude (V) 4.673
Characteristics
Spectral type A1IV
U−B color index +0.03
B−V color index +0.010
Astrometry
Radial velocity (Rv)28.7 km/s
Proper motion (μ) RA: −103.51 mas/yr
Dec.: −39.48 mas/yr
Parallax (π)18.00 ± 0.21 mas
Distance181 ± 2 ly
(55.6 ± 0.6 pc)
Absolute magnitude (MV)+1.1
Details
Mass2.18 M
Radius2.5 R
Luminosity36 L
Surface gravity (log g)4.17 cgs
Temperature9,108 K
Rotational velocity (v sin i)86±6 km/s
Age171 Myr
Other designations
Asellus Borealis, γ Cnc, Gamma Cnc, 43 Cnc, BD+21° 1895, FK5 1228, GC 11982, HD 74198, HIP 42806, HR 3449, SAO 80378, CCDM 08433+2128
Database references
SIMBADdata
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.