Gamma Columbae
Gamma Columbae, Latinized from γ Columbae, is a possible wide binary star system in the southern constellation of Columba. It is visible to the naked eye with an apparent visual magnitude of 4.36. Based upon an annual parallax shift of 3.75 mas, it is located roughly 870 light years from the Sun.

The primary component is an evolved B-type subgiant star with a stellar classification of B2.5 IV. It is a candidate slowly pulsating B-type star with a mean longitudinal magnetic field strength of . The star has nearly six times the mass of the Sun and close to five times the Sun's girth. It is radiating over 2,000 times the solar luminosity from its outer atmosphere at an effective temperature of 12,904 K. The estimated age of this star is around 24 million years.

The visual magnitude 12.664 companion is a G-type main sequence star with a classification of G8 V. It lies at an angular separation of 33.8 arc seconds from the primary, which corresponds to a projected physical separation of 8,844 AU. Despite the young age of these stars, there has been no X-ray emission detected.
Q1806983
Latinized
UNK
Q50053
binary star
Concept
Q8928
constellation
Concept
Q10425
Columba
CEL
Q124313
apparent visual magnitude
Concept
Q906561
parallax shift
Concept
Q12097402
mas
Concept
Q531
light year
Concept
Q525
Sun
CEL
Q6472
evolved
Concept
Q25377588
B-type
Concept
Q6227
subgiant star
Concept
Q25377588
stellar classification
Concept
Q18392084
slowly pulsating B-type star
CEL
Q11408
magnetic field
Concept
Q180892
mass of the Sun
Concept
Q48440
Sun's girth
Concept
Q843877
solar luminosity
Concept
Q6311
outer atmosphere
Concept
Q854050
effective temperature
Concept
Q5864
G-type main sequence star
Concept
Q1357788
angular separation
Concept
Q12097402
arc second
Concept
Q1811
AU
Concept
Q3232689
Gamma Columbae
CEL
+4.36^^http://www.w3.org/2001/XMLSchema#decimal
4.36
NUMBER
+3.75^^http://www.w3.org/2001/XMLSchema#decimal
3.75
NUMBER
+2.5^^http://www.w3.org/2001/XMLSchema#decimal
2.5
NUMBER
+24^^http://www.w3.org/2001/XMLSchema#decimal
24
NUMBER
+12.664^^http://www.w3.org/2001/XMLSchema#decimal
12.664
NUMBER
+8^^http://www.w3.org/2001/XMLSchema#decimal
8
NUMBER
+33.8^^http://www.w3.org/2001/XMLSchema#decimal
33.8
NUMBER
constellation
apparent magnitude
instance of