Star in the constellation Carina
! style="text-align: center; background-color: #FFFFC0;" colspan="2" | Observation dataEpoch J2000
       Equinox J2000
! style="text-align:left" | Constellation
! style="text-align:left" | Right ascension
! style="text-align:left" | Declination
! style="text-align:left" | Apparent magnitude (V)
! style="background-color: #FFFFC0; text-align: center;" colspan="2"| Characteristics
! style="text-align:left" | Spectral type
! style="text-align:left" | B−V 
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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.
References.
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