Delta Columbae
Delta Columbae is a binary star system in the constellation Columba. It can be seen with the naked eye having an apparent visual magnitude of 3.85. The distance to this system, based upon an annual parallax shift of 13.94 mas, is around 234 lightyears.

Delta Columbae was a latter designation of 3 Canis Majoris, as the early astronomers Johann Bayer and John Flamsteed did not include the constellation Columba in their star charts. It has the uncommon traditional name Ghusn al Zaitun, from the Arabic الغصن الزيتون "al-ghuşn al-zaitūn" "the olive branch" (carried by the dove of Noah's Ark). 

This is a single-lined spectroscopic binary system with an orbital period of 868.78 days and an eccentricity of 0.7. It has a peculiar velocity of , making it a candidate runaway star system. The primary component is a G-type bright giant star with a stellar classification of G7 II. It radiates around 149 time the solar luminosity from its outer atmosphere at an effective temperature of 5,136 K.
Q50053
binary star
Concept
Q8928
constellation
Concept
Q10425
Columba
CEL
Q124313
apparent visual magnitude
Concept
Q906561
parallax shift
Concept
Q12097402
mas
Concept
Q531
lightyear
Concept
Q78427
Johann Bayer
PER
Q242388
John Flamsteed
PER
Q126553
Noah's Ark
Concept
Q50053
spectroscopic binary
Concept
Q37640
orbital period
Concept
Q208474
eccentricity
Concept
Q1253791
peculiar velocity
Concept
Q6440
runaway star
Concept
Q25377588
G-type
Concept
Q5881
bright giant star
Concept
Q25377588
stellar classification
Concept
Q843877
solar luminosity
Concept
Q6311
outer atmosphere
Concept
Q854050
effective temperature
Concept
Q1756776
Delta Columbae
CEL
Q1756776
Delta Columbae
CEL
+3.85^^http://www.w3.org/2001/XMLSchema#decimal
3.85
NUMBER
+13.94^^http://www.w3.org/2001/XMLSchema#decimal
13.94
NUMBER
+3^^http://www.w3.org/2001/XMLSchema#decimal
3
NUMBER
+0.7^^http://www.w3.org/2001/XMLSchema#decimal
0.7
NUMBER
+7^^http://www.w3.org/2001/XMLSchema#decimal
7
NUMBER
constellation
apparent magnitude
instance of