Upsilon2 Centauri
Upsilon2 Centauri (υ2 Centauri) is a binary star system in the southern constellation Centaurus. It is visible to the naked eye with an apparent visual magnitude of +4.33. Based upon an annual parallax shift of just 2.57 mas as seen from Earth, this star is located roughly 1,300 light years from the Sun. Relative to its neighbors, the system has a peculiar velocity of and it may form a runaway star system.

This is a single-lined spectroscopic binary star system with an orbital period of 207.357 days and an eccentricity of 0.55. The primary component has the spectrum of an evolved F-type giant/bright giant hybrid with a stellar classification of F7 II/III. It is around 46 million years old with 6.9 times the mass of the Sun. The star is radiating 3,919 times the Sun's luminosity from its photosphere at an effective temperature of 6,495 K.
Q50053
binary star
Concept
Q8928
constellation
Concept
Q8844
Centaurus
CEL
Q124313
apparent visual magnitude
Concept
Q906561
parallax shift
Concept
Q12097402
mas
Concept
Q531
light year
Concept
Q525
Sun
CEL
Q1253791
peculiar velocity
Concept
Q6440
runaway star
Concept
Q50053
spectroscopic binary
Concept
Q37640
orbital period
Concept
Q208474
eccentricity
Concept
Q752171
spectrum
Concept
Q6472
evolved
Concept
Q25377588
F-type
Concept
Q5875
giant
Concept
Q5881
bright giant
Concept
Q25377588
stellar classification
Concept
Q180892
mass of the Sun
Concept
Q843877
Sun's luminosity
Concept
Q6372
photosphere
Concept
Q854050
effective temperature
Concept
Q3304627
Upsilon2 Centauri
CEL
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
++4.33^^http://www.w3.org/2001/XMLSchema#decimal
+4.33
NUMBER
+2.57^^http://www.w3.org/2001/XMLSchema#decimal
2.57
NUMBER
+0.55^^http://www.w3.org/2001/XMLSchema#decimal
0.55
NUMBER
+7^^http://www.w3.org/2001/XMLSchema#decimal
7
NUMBER
+46^^http://www.w3.org/2001/XMLSchema#decimal
46
NUMBER
+6.9^^http://www.w3.org/2001/XMLSchema#decimal
6.9
NUMBER
constellation
instance of
subclass of