HD 69863
HD 69863 is a binary star system in the southern constellation of Carina. It is visible to the naked eye as a dim point of light with a combined apparent visual magnitude of 5.16. The system is located at a distance of about255 light years from the Sun based on parallax. The dual nature of this system was announced in 1832 by German astronomer Carl Rümker. As of 2015, the pair had an angular separation of along a position angle of 70°.

The brighter primary, designated component A, has a visual magnitude of 5.27 and is an A-type main-sequence star with a stellar classification of A2V. It is 635 million years old and is spinning with a projected rotational velocity of 191 km/s. The star has 2.1 times the mass of the Sun.

The magnitude 7.62 companion, component B, is a F-type main-sequence star with a class of F2V. It is radiating four times the luminosity of the Sun from its photosphere at an effective temperature of 6,806 K. The system is a source for X-ray emission, which is most likely coming from the secondary.
Q50053
binary star
Concept
Q8928
constellation
Concept
Q10470
Carina
CEL
Q124313
apparent visual magnitude
Concept
Q531
light year
Concept
Q525
Sun
CEL
Q906561
parallax
Concept
Q70272
Carl Rümker
PER
Q1357788
angular separation
Concept
Q2105737
position angle
UNK
Q471805
A-type main-sequence star
Concept
Q25377588
stellar classification
Concept
Q6464
projected rotational velocity
Concept
Q180892
mass of the Sun
Concept
Q1353952
F-type main-sequence star
Concept
Q843877
luminosity of the Sun
Concept
Q6372
photosphere
Concept
Q854050
effective temperature
Concept
Q1852
X-ray emission
Concept
Q2404037
HD 69863
CEL
1832-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1832
DATE
2015-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2015
DATE
+5.16^^http://www.w3.org/2001/XMLSchema#decimal
5.16
NUMBER
+255^^http://www.w3.org/2001/XMLSchema#decimal
255
NUMBER
+70^^http://www.w3.org/2001/XMLSchema#decimal
70
NUMBER
+5.27^^http://www.w3.org/2001/XMLSchema#decimal
5.27
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+2.1^^http://www.w3.org/2001/XMLSchema#decimal
2.1
NUMBER
+7.62^^http://www.w3.org/2001/XMLSchema#decimal
7.62
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
instance of
constellation
apparent magnitude
instance of