V520 Carinae
V520 Carinae is a single star in the southern constellation of Carina. It has the Bayer designation "w Carinae", while "V520 Carinae" is a variable star designation. The star has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude that fluctuates around +4.58. It is located at a distance of approximately 1,140 light years from the Sun based on parallax, and it is drifting further away with a radial velocity of +9 km/s. It is a candidate member of the IC 2391 moving group of co-moving stars.

This is an aging giant star with a stellar classification of K4III, although Humphreys (1970) found a supergiant class of K3Ib. It is a suspected slow irregular variable of type Lc and its brightness varies from magnitude +4.50 to +4.59 with no periodicity. The star now has 131 times the girth of the Sun, having exhausted the supply of hydrogen at its core then cooled and expanded. Comparison with theoretical evolutionary tracks suggests it is 33 million years old with 7.9 times the mass of the Sun, although analysis of its motion suggests it may be an astrometric binary with a mass of . The star is radiating 3,600 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 3,903 K.
Q523
star
Concept
Q8928
constellation
Concept
Q10470
Carina
CEL
Q105616
Bayer designation
Concept
Q593448
variable star designation
Concept
Q124313
apparent visual magnitude
Concept
Q531
light year
Concept
Q525
Sun
CEL
Q906561
parallax
Concept
Q240105
radial velocity
Concept
Q915499
IC 2391
CEL
Q6440
moving group
Concept
Q5875
giant star
Concept
Q25377588
stellar classification
Concept
Q193599
supergiant
Concept
Q779609
slow irregular variable
CEL
Q48440
girth of the Sun
Concept
Q60790215
core
Concept
Q180892
mass of the Sun
Concept
Q50053
astrometric binary
Concept
Q843877
luminosity of the Sun
Concept
Q6372
photosphere
Concept
Q854050
effective temperature
Concept
Q3781929
V520 Carinae
CEL
Q3781929
V520 Carinae
CEL
2391-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2391
DATE
+520^^http://www.w3.org/2001/XMLSchema#decimal
520
NUMBER
+520^^http://www.w3.org/2001/XMLSchema#decimal
520
NUMBER
++4.58^^http://www.w3.org/2001/XMLSchema#decimal
+4.58
NUMBER
++9^^http://www.w3.org/2001/XMLSchema#decimal
+9
NUMBER
+4^^http://www.w3.org/2001/XMLSchema#decimal
4
NUMBER
+1970^^http://www.w3.org/2001/XMLSchema#decimal
1970
NUMBER
+3^^http://www.w3.org/2001/XMLSchema#decimal
3
NUMBER
++4.50^^http://www.w3.org/2001/XMLSchema#decimal
+4.50
NUMBER
++4.59^^http://www.w3.org/2001/XMLSchema#decimal
+4.59
NUMBER
+33^^http://www.w3.org/2001/XMLSchema#decimal
33
NUMBER
+7.9^^http://www.w3.org/2001/XMLSchema#decimal
7.9
NUMBER
instance of
constellation
instance of