Phi Centauri
Phi Centauri, Latinized from φ Centauri, is a blue-white hued star in the southern constellation Centaurus. It is visible to the naked eye with an apparent visual magnitude of +3.7. The annual parallax shift is 6.21 mas as measured from Earth, which yields a distance estimate of around 530 light years. It is moving further from the Sun with a radial velocity of +5 km/s.

This is a B-type subgiant star with a stellar classification of B2 IV. It has no known companions, but does show radial velocity variations and higher order pulsations in the spectrum. The star is just 18 million years old with 8.5 times the mass of the Sun and has 4.2 times the Sun's radius. It is radiating around 4,000 times the Sun's luminosity from its photosphere at an effective temperature of about 21,638 K.

This star is a proper motion member of the Upper-Centaurus Lupus sub-group in the
Scorpius-Centaurus OB association, the nearest such co-moving association of massive stars to the Sun.
Q1806983
Latinized
UNK
Q523
star
Concept
Q8928
constellation
Concept
Q8844
Centaurus
CEL
Q124313
apparent visual magnitude
Concept
Q906561
parallax shift
Concept
Q12097402
mas
Concept
Q531
light year
Concept
Q240105
radial velocity
Concept
Q25377588
B-type
Concept
Q6227
subgiant star
Concept
Q25377588
stellar classification
Concept
Q752171
spectrum
Concept
Q180892
mass of the Sun
Concept
Q48440
Sun's radius
Concept
Q843877
Sun's luminosity
Concept
Q6372
photosphere
Concept
Q854050
effective temperature
Concept
Q193223
proper motion
Concept
Q45059
Scorpius-Centaurus
CEL
Q736194
OB association
Concept
Q2703519
Phi Centauri
CEL
++3.7^^http://www.w3.org/2001/XMLSchema#decimal
+3.7
NUMBER
+6.21^^http://www.w3.org/2001/XMLSchema#decimal
6.21
NUMBER
++5^^http://www.w3.org/2001/XMLSchema#decimal
+5
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+18^^http://www.w3.org/2001/XMLSchema#decimal
18
NUMBER
+8.5^^http://www.w3.org/2001/XMLSchema#decimal
8.5
NUMBER
+4.2^^http://www.w3.org/2001/XMLSchema#decimal
4.2
NUMBER
instance of
constellation
instance of