HD 83446
HD 83446 is a probable astrometric binary star system in the constellation Vela. It is visible to the naked eye with an apparent visual magnitude of 4.34. Based upon an annual parallax shift of , 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.

The visible component is an A-type main-sequence star with a stellar classification of A7 V. Observations with the BRITE constellation led to this star's identification as a Delta Scuti variable with pulsation periods of 31.0806 and 34.2098 days. 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. The star is roughly 453 million years old with 1.8 times the mass of the Sun. It is radiating 16 times the Sun's luminosity from its photosphere at an effective temperature of 8,331 K.
Q50053
astrometric binary
Concept
Q523
star
Concept
Q8928
constellation
Concept
Q10521
Vela
CEL
Q124313
apparent visual magnitude
Concept
Q906561
parallax shift
Concept
Q531
light year
Concept
Q240105
radial velocity
Concept
Q471805
A-type main-sequence star
Concept
Q25377588
stellar classification
Concept
Q796936
BRITE
CEL
Q836976
Delta Scuti variable
CEL
Q6464
projected rotational velocity
Concept
Q208395
oblate
Concept
Q1440352
equatorial bulge
UNK
Q180892
mass of the Sun
Concept
Q843877
Sun's luminosity
Concept
Q6372
photosphere
Concept
Q854050
effective temperature
Concept
Q3781805
HD 83446
CEL
+4.34^^http://www.w3.org/2001/XMLSchema#decimal
4.34
NUMBER
+107.1^^http://www.w3.org/2001/XMLSchema#decimal
107.1
NUMBER
++18^^http://www.w3.org/2001/XMLSchema#decimal
+18
NUMBER
+7^^http://www.w3.org/2001/XMLSchema#decimal
7
NUMBER
+31.080^^http://www.w3.org/2001/XMLSchema#decimal
31.080
NUMBER
+6^^http://www.w3.org/2001/XMLSchema#decimal
6
NUMBER
+34.209^^http://www.w3.org/2001/XMLSchema#decimal
34.209
NUMBER
+8^^http://www.w3.org/2001/XMLSchema#decimal
8
NUMBER
+6^^http://www.w3.org/2001/XMLSchema#decimal
6
NUMBER
+1.8^^http://www.w3.org/2001/XMLSchema#decimal
1.8
NUMBER
+16^^http://www.w3.org/2001/XMLSchema#decimal
16
NUMBER
instance of
instance of
constellation
type of variable star
instance of