2 Centauri
2 Centauri is a single star in the southern constellation of Centaurus, located approximately 183 light years from Earth. It has the Bayer designation g Centauri; "2 Centauri" is the Flamsteed designation. This object is visible to the naked eye as faint, red-hued star with an apparent visual magnitude of 4.19. It is moving away from the Earth with a heliocentric radial velocity of +41 km/s. The star is a member of the HD 1614 supercluster.

This is an evolved red giant star with a stellar classification of M5 III. It is classified as a semiregular variable star and its brightness varies from magnitude +4.16 to +4.26 with a period of 12.57 days. The star has around 70 times the Sun's radius and is radiating 72 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,398 K.
Q523
star
Concept
Q8928
constellation
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Q8844
Centaurus
CEL
Q531
light years
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Q2
Earth
CEL
Q105616
Bayer designation
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Q111116
Flamsteed designation
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Q124313
apparent visual magnitude
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Q240105
radial velocity
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Q6472
evolved
Concept
Q50081
red giant
Concept
Q25377588
stellar classification
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Q1054411
semiregular
CEL
Q6243
variable star
Concept
Q48440
Sun's radius
Concept
Q843877
Sun's luminosity
Concept
Q6372
photosphere
Concept
Q854050
effective temperature
Concept
Q4633315
2 Centauri
CEL
Q4633315
2 Centauri
CEL
1614-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1614
DATE
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+4.19^^http://www.w3.org/2001/XMLSchema#decimal
4.19
NUMBER
++41^^http://www.w3.org/2001/XMLSchema#decimal
+41
NUMBER
+5^^http://www.w3.org/2001/XMLSchema#decimal
5
NUMBER
++4.16^^http://www.w3.org/2001/XMLSchema#decimal
+4.16
NUMBER
++4.26^^http://www.w3.org/2001/XMLSchema#decimal
+4.26
NUMBER
+12.57^^http://www.w3.org/2001/XMLSchema#decimal
12.57
NUMBER
+70^^http://www.w3.org/2001/XMLSchema#decimal
70
NUMBER
+72^^http://www.w3.org/2001/XMLSchema#decimal
72
NUMBER
instance of
constellation
apparent magnitude
instance of
radius
instance of