Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Vela |
Right ascension | 09h 36m 49.53851s[1] |
Declination | −49° 21′ 18.0873″[1] |
Apparent magnitude (V) | 4.34[2] |
Characteristics | |
Evolutionary stage | main sequence[3] |
Spectral type | A7 V[4] |
B−V color index | 0.173±0.005[2] |
Variable type | δ Sct[5] |
Astrometry | |
Radial velocity (Rv) | +17.8±0.5[6] km/s |
Proper motion (μ) | RA: −130.55[1] mas/yr Dec.: +42.98[1] mas/yr |
Parallax (π) | 30.4562 ± 0.1933 mas[1] |
Distance | 107.1 ± 0.7 ly (32.8 ± 0.2 pc) |
Absolute magnitude (MV) | 1.79[2] |
Details | |
Mass | 1.8+0.11 −0.09[7] M☉ |
Luminosity | 15.99[2] L☉ |
Surface gravity (log g) | 4.3±0.14[7] cgs |
Temperature | 8,331±283[7] K |
Rotational velocity (v sin i) | 155[8] km/s |
Age | 453+256 −278[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 83446 is a probable astrometric binary[10] star system in the constellation Vela. It is visible to the naked eye with an apparent visual magnitude of 4.34.[2] Based upon an annual parallax shift of 30.5 mas,[1] it is located 107.1 light years from the Sun. The system is moving further away with a heliocentric radial velocity of +18 km/s.[6]
The visible component is an A-type main-sequence star with a stellar classification of A7 V.[4] Observations with the BRITE constellation led to this star's identification as a Delta Scuti variable with pulsation frequencies of 31.0806 and 34.2098 cycles per day, corresponding to periods of 46.3 and 42.1 minutes, respectively.[5] It has a high rate of spin with a projected rotational velocity of 155 km/s, which is giving the star an oblate shape with an equatorial bulge that is 6% larger than the polar radius.[8] The star is roughly 453[7] million years old with 1.8[7] times the mass of the Sun. It is radiating 16[2] times the Sun's luminosity from its photosphere at an effective temperature of 8,331 K.[7]