Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Vela |
Right ascension | 09h 36m 25.4069s[1] |
Declination | –48° 45′ 04.2549″[1] |
Apparent magnitude (V) | 6.232 |
Characteristics | |
HD 83368A | |
Spectral type | A8V[1] |
Apparent magnitude (G) | 6.219[2] |
Variable type | Rapidly oscillating Ap |
HD 83368B | |
Spectral type | F9V[3] |
Apparent magnitude (G) | 8.995[4] |
Astrometry | |
HD 83368A | |
Proper motion (μ) | RA: -8.16±0.03 mas/yr[2] Dec.: -18.85±0.03 mas/yr[2] |
Parallax (π) | 14.01 ± 0.03 mas[2] |
Distance | 232.8 ± 0.5 ly (71.4 ± 0.2 pc) |
HD 83368B | |
Radial velocity (Rv) | -4.0±0.3[4] km/s |
Proper motion (μ) | RA: -9.41±0.19 mas/yr[4] Dec.: -14.00±0.17 mas/yr[4] |
Parallax (π) | 14.31 ± 0.15 mas[4] |
Distance | 228 ± 2 ly (69.9 ± 0.7 pc) |
Details | |
HD 83368A | |
Mass | 1.78+0.12 −0.17[5] M☉ |
Radius | 2.003[6] R☉ |
Luminosity (bolometric) | 12.33[6] L☉ |
Surface gravity (log g) | 4.2[6] cgs |
Temperature | 7650[6] K |
Rotation | 2.851976±0.00003 d[6] |
Rotational velocity (v sin i) | 33.8±1.0[5] km/s |
Age | 0.93+0.42 −0.34[5] Gyr |
HD 83368B | |
Surface gravity (log g) | 4 cgs |
Other designations | |
HD 83368A: 2MASS J09362541-4845042, TYC 8176-283-1 | |
HD 83368B: 2MASS J09362537-4845072, Gaia DR2 5410092611662456704, TYC 8176-2818-1 | |
Database references | |
SIMBAD | data |
HR 3831, also known as HD 83368, is a binary star system in the southern constellation of Vela at a distance of 233 light years. This object is barely visible to the naked eye as a dim, blue star with an apparent visual magnitude of 6.232. It is approaching the Earth with a heliocentric radial velocity of 4.0±0.3 km/s.[4]
The star system is a visual binary with a 3.29″ projected separation,[6] identified as such in 2002.[7] The larger star, HD 83368A, is a pulsating variable of a rapidly oscillating Ap type. It has a single yet strongly distorted dipole pulsation mode with a frequency of 1427 µHz.[8] The primary star is chemically peculiar, exhibiting spots of enhanced concentrations of lithium, europium and oxygen.[6]