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V337 Carinae (V337 Car, q Carinae) is a K-type 
V337 has a spectral class of K2.5II, indicating a bright giant. It is considered likely to be on the
bright giant
A giant star is a star with substantially larger radius and luminosity than a main-sequence (or ''dwarf'') star of the same surface temperature.Giant star, entry in ''Astronomy Encyclopedia'', ed. Patrick Moore, New York: Oxford University Press ...
star in the constellation of Carina
Carina may refer to:
Places
Australia
* Carina, Queensland, a suburb in Brisbane
* Carina Heights, Queensland, a suburb in Brisbane
* Carina, Victoria, a locality in Mildura
Serbia
* Carina, Osečina, a village in the Kolubara District
...
. It is an irregular variable
An irregular variable is a type of variable star in which variations in brightness show no regular periodicity. There are two main sub-types of irregular variable: eruptive and pulsating.
Eruptive irregular variables are divided into three categor ...
and has an apparent visual magnitude
Apparent magnitude () is a measure of the brightness of a star or other astronomical object observed from Earth. An object's apparent magnitude depends on its intrinsic luminosity, its distance from Earth, and any extinction of the object's lig ...
which varies between 3.36 and 3.44.
V337 has a spectral class of K2.5II, indicating a bright giant. It is considered likely to be on the red giant branch
The red-giant branch (RGB), sometimes called the first giant branch, is the portion of the giant branch before helium ignition occurs in the course of stellar evolution. It is a stage that follows the main sequence for low- to intermediate-mass sta ...
of stars fusing hydrogen around an inert helium core. Its limb-darkened angular diameter
The angular diameter, angular size, apparent diameter, or apparent size is an angular distance describing how large a sphere or circle appears from a given point of view. In the vision sciences, it is called the visual angle, and in optics, it is ...
has been measured using interferometry at .
V337 Carinae has two companions listed in multiple star catalogues. Both are 13th-magnitude stars, component B and component C away. Component B is a distant background star, while component C is at about the same distance as V337 Carinae.
References
{{DEFAULTSORT:V337 Carinae Carina (constellation) Slow irregular variables K-type bright giants Carinae, q 089388 050371 Carinae, V337 CD-60 03010 4050