17 Canis Majoris

17 Canis Majoris is a single^[6] star in the southern constellation of Canis Major, located 610 light years away from the Sun.^[1] It is visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 5.80.^[2] The object is moving closer to the Earth with a heliocentric radial velocity of −13 km/s.^[2]

17 Canis Majoris

Observation data Epoch J2000      Equinox J2000
Constellation	Canis Major
Right ascension	06h 55m 02.73805s[1]
Declination	−20° 24′ 17.5527″[1]
Apparent magnitude (V)	5.80[2]
Characteristics
Evolutionary stage	Main sequence[3]
Spectral type	A2 V[4]
B−V color index	0.048±0.003[2]
Astrometry
Radial velocity (Rv)	−12.9±0.5[2] km/s
Proper motion (μ)	RA: −0.284 mas/yr Dec.: +10.574 mas/yr
Parallax (π)	5.3270±0.0978 mas
Distance	610 ± 10 ly (188 ± 3 pc)
Absolute magnitude (MV)	−0.14[2]
Details
Mass	2.84±0.05[3] M☉
Luminosity	126+18 −15[3] L☉
Temperature	8,872+164 −162[3] K
Rotational velocity (v sin i)	43[3] km/s
Other designations
17 CMa, BD−20°1624, GC 9078, HD 51055, HIP 33248, HR 2588, SAO 172569, ADS 5585, CCDM 06550-2025, WDS J06550-2024[5]
Database references
SIMBAD	data

This is an A-type main-sequence star with a stellar classification of A2 V,^[4] and is near the end of its main sequence lifetime. It has 2.8 times the mass of the Sun and is spinning with a projected rotational velocity of 43 km/s.^[3] The star is radiating 126 times the luminosity of the Sun from its photosphere at an effective temperature of 8,872 K.^[3] It has a magnitude 8.66 visual companion at an angular separation of 42.90″ along a position angle of 147°, as of 2015.^[7]