HD 129116
HD 129116 is a single star in the southern constellation of Centaurus. It is also known by its Bayer designation of b Centauri, while "HD 129116" is the star's identifier in the "Henry Draper catalogue". This object has a blue-white hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.01. It is located at a distance of approximately 339 light years from the Sun based on parallax, and has an absolute magnitude of −1.07. The star is a probable (93% chance) member of the Sco OB2 moving group of stars.

This is a B-type main-sequence star with a stellar classification of B3V, which indicates it is engaged in core hydrogen fusion to generate energy. The object has been used as a "standard star" in several photometric systems, and it appears to be non-variable. It is an estimated 18 million years old with a high rate of spin, showing a projected rotational velocity of 129 km/s. The star has 6.3 times the mass of the Sun and 2.9 times the Sun's radius. It is radiating 637 times the luminosity of the Sun from its photosphere at an effective temperature of 18,445 K.
Q523
star
Concept
Q8928
constellation
Concept
Q8844
Centaurus
CEL
Q105616
Bayer designation
Concept
Q111130
Henry Draper catalogue
MEDIA
Q124313
apparent visual magnitude
Concept
Q531
light year
Concept
Q525
Sun
CEL
Q906561
parallax
Concept
Q159653
absolute magnitude
Concept
Q45059
Sco OB2
CEL
Q767432
B-type main-sequence star
Concept
Q25377588
stellar classification
Concept
Q60790215
core
Concept
Q13082
hydrogen fusion
Concept
Q1073340
photometric systems
Concept
Q6243
variable
Concept
Q6464
projected rotational velocity
Concept
Q180892
mass of the Sun
Concept
Q48440
Sun's radius
Concept
Q843877
luminosity of the Sun
Concept
Q6372
photosphere
Concept
Q854050
effective temperature
Concept
Q2072696
HD 129116
CEL
+129116^^http://www.w3.org/2001/XMLSchema#decimal
129116
NUMBER
++4.01^^http://www.w3.org/2001/XMLSchema#decimal
+4.01
NUMBER
+1.07^^http://www.w3.org/2001/XMLSchema#decimal
1.07
NUMBER
+93^^http://www.w3.org/2001/XMLSchema#decimal
93
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+3^^http://www.w3.org/2001/XMLSchema#decimal
3
NUMBER
+18^^http://www.w3.org/2001/XMLSchema#decimal
18
NUMBER
+6.3^^http://www.w3.org/2001/XMLSchema#decimal
6.3
NUMBER
+2.9^^http://www.w3.org/2001/XMLSchema#decimal
2.9
NUMBER
instance of
constellation
instance of