HR 4138
HR 4138 is a single star in the constellation Carina. It has the Bayer designation K Carinae, abbreviated K Car, while "HR 4138" is the star's designation in the "Bright Star Catalogue". It has a white hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.72. This star is located at a distance of approximately 261 light years from the Sun based on parallax measurements, and it is drifting further away with a radial velocity of +7.5 km/s. Judging from its motion through space, it is a candidate member of the Sirius supercluster.

This object is a superficially normal A-type star. However, there is some disagreement over the evolutionary state of the star, as it has received luminosity classifications of a subgiant, main sequence, and a giant star. Unexpectedly for an A-type star, a magnetic field has been detected. It is around 400 million years old and has a low projected rotational velocity of 12 km/s. The star displays an infrared excess, indicating the presence of an orbiting debris disk with a black body temperature of 45 K at a separation of from the host star.
Q523
star
Concept
Q8928
constellation
Concept
Q10470
Carina
CEL
Q105616
Bayer designation
Concept
Q499138
Bright Star Catalogue
CEL
Q124313
apparent visual magnitude
Concept
Q531
light year
Concept
Q525
Sun
CEL
Q906561
parallax
Concept
Q240105
radial velocity
Concept
Q3409
Sirius supercluster
CEL
Q25377588
A-type
Concept
Q6472
evolutionary state
Concept
Q25377588
luminosity class
Concept
Q6227
subgiant
Concept
Q3450
main sequence
Concept
Q5875
giant star
Concept
Q6449
magnetic field
Concept
Q6464
projected rotational velocity
Concept
Q1396651
infrared excess
UNK
Q161424
black body
Concept
Q2609549
HR 4138
CEL
Q2609549
HR 4138
CEL
4138-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
4138
DATE
4138-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
4138
DATE
++4.72^^http://www.w3.org/2001/XMLSchema#decimal
+4.72
NUMBER
++7.5^^http://www.w3.org/2001/XMLSchema#decimal
+7.5
NUMBER
+12^^http://www.w3.org/2001/XMLSchema#decimal
12
NUMBER
+45^^http://www.w3.org/2001/XMLSchema#decimal
45
NUMBER
instance of
constellation
instance of
instance of
subclass of