HR 3220
HR 3220 is a binary star system in the southern constellation of Carina. It has the Bayer designation B Carinae; "HR 3220" is the designation from the "Bright Star Catalogue". It has a yellow-white hue and is visible to the naked eye with an apparent visual magnitude of 4.75. Based upon parallax measurements, it is located at a distance of 59 light years from the Sun. The system is drifting further away with a radial velocity of +24 km/s.

This is a single-lined spectroscopic binary system with an orbital period of and an eccentricity of 0.12. The visible component is an F-type main sequence star with a stellar classification of , where the suffix notation indicates mild but anomalous underabundances of iron and the cyano radical. The secondary is most likely a helium white dwarf with 0.47 times the mass of the Sun. Mass transfer from the white dwarf progenitor has given the primary the spectral signature of a blue straggler that appears much younger than its actual age of about 10 billion years.
Q50053
binary star
Concept
Q8928
constellation
Concept
Q10470
Carina
CEL
Q105616
Bayer designation
Concept
Q499138
Bright Star Catalogue
CEL
Q124313
apparent visual magnitude
Concept
Q906561
parallax
Concept
Q531
light year
Concept
Q525
Sun
CEL
Q240105
radial velocity
Concept
Q50053
spectroscopic binary
Concept
Q37640
orbital period
Concept
Q208474
eccentricity
Concept
Q1353952
F-type main sequence star
Concept
Q25377588
stellar classification
Concept
Q3416481
cyano radical
UNK
Q5871
white dwarf
Concept
Q5848
blue straggler
Concept
Q2024988
HR 3220
CEL
Q2024988
HR 3220
CEL
3220-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
3220
DATE
3220-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
3220
DATE
+4.75^^http://www.w3.org/2001/XMLSchema#decimal
4.75
NUMBER
+59^^http://www.w3.org/2001/XMLSchema#decimal
59
NUMBER
++24^^http://www.w3.org/2001/XMLSchema#decimal
+24
NUMBER
+0.12^^http://www.w3.org/2001/XMLSchema#decimal
0.12
NUMBER
+0.47^^http://www.w3.org/2001/XMLSchema#decimal
0.47
NUMBER
+10^^http://www.w3.org/2001/XMLSchema#decimal
10
NUMBER
constellation
instance of
instance of