HD 88955

This article is about q Velorum. For Q Velorum, see HD 88206.

HD 88955 is a single,^[11] white-hued star in the southern constellation of Vela. It can be viewed with the naked eye, having an apparent visual magnitude of 3.85.^[3] The distance to HD 88955 can be determined from its annual parallax shift of 31.6 mas,^[2] which yields a distance of 103 light years from the Sun. It is moving further from the Earth with a heliocentric radial velocity of +7 km/s.^[5] Bayesian analysis suggests HD 88955 is a member of the Argus Association,^[12] a group of co-moving stars usually associated with the IC 2391 open cluster.

HD 88955

Location of HD 88955 (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Vela[1]
Right ascension	10h 14m 44.1557s[2]
Declination	−42° 07′ 18.989″[2]
Apparent magnitude (V)	3.85[3]
Characteristics
Evolutionary stage	main sequence[4]
Spectral type	A2 V[3]
B−V color index	+0.051±0.005[1]
Astrometry
Radial velocity (Rv)	+7.4±2.7[5] km/s
Proper motion (μ)	RA: −149.929[2] mas/yr Dec.: +49.548[2] mas/yr
Parallax (π)	31.6369±0.1684 mas[2]
Distance	103.1 ± 0.5 ly (31.6 ± 0.2 pc)
Absolute magnitude (MV)	1.39[1]
Details
Mass	2.17[6] M☉
Radius	2.11[6] R☉
Luminosity	23.24[6] L☉
Surface gravity (log g)	4.08±0.14[7] cgs
Temperature	9,451±321[7] K
Metallicity [Fe/H]	−0.02[8] dex
Rotational velocity (v sin i)	100±4[9] km/s
Age	410[6] Myr
Other designations
q Velorum, CD−41°5713, FK5 382, GC 14076, HD 88955, HIP 50191, HR 4023, SAO 221895[10]
Database references
SIMBAD	data

This is an A-type main-sequence star with a stellar classification of A2 V.^[3] It is about 410 million years old^[6] with a projected rotational velocity of 100 km/s.^[9] The star has 2.17 times the mass of the Sun^[6] and 2.11 times the Sun's radius.^[6] It is radiating 23 times the Sun's luminosity^[6] from its photosphere at an effective temperature of 9,451 K.^[7] An infrared excess has been detected from HD 88955, which analysis suggests is a (3.6±3.0)×10⁻⁷ M_🜨 debris disc with a mean temperature of 138±21 K orbiting the host star at an average distance of 19.3±5.7 AU.^[13]