Nu Puppis
Nu Puppis (ν Puppis) is a solitary, blue-hued star in the southern constellation of Puppis. It is the fifth-brightest star in Puppis, with an apparent visual magnitude of 3.17. Based upon an annual parallax shift of 8.78 mas as seen from Earth, it is located about 370 light years from the Sun. The system made its closest approach about 3.6 million years ago when it underwent perihelion passage at a distance of roughly 27 light years.

The star has a stellar classification of B8 III, matching a B-type giant. Absorption lines in the spectrum are displaying central quasi-emission peaks, indicating this is a Be shell star with a circumstellar disk of heated gas that is being seen edge-on. ν Puppis is a candidate variable star showing an amplitude of 0.0117 magnitude with a frequency of 0.15292 per day. It is spinning rapidly with a projected rotational velocity of 225 km/s. This rotation is giving the star an oblate shape, with the equator being 31% larger than the poles. It is radiating (after allowance for ultraviolet radiation) 1,340 times the Sun's luminosity from its photosphere at an effective temperature of 12,120 K.
Q523
star
Concept
Q8928
constellation
Concept
Q9251
Puppis
CEL
Q124313
apparent visual magnitude
Concept
Q906561
parallax shift
Concept
Q12097402
mas
Concept
Q531
light year
Concept
Q83481
perihelion
Concept
Q531
light year
Concept
Q25377588
stellar classification
Concept
Q25377588
B-type
Concept
Q5875
giant
Concept
Q212111
Absorption line
Concept
Q654182
spectrum
Concept
Q812800
Be
Concept
Q5849644
shell star
Concept
Q6243
variable star
Concept
Q11652
frequency
Concept
Q6464
projected rotational velocity
Concept
Q208395
oblate shape
Concept
Q843877
Sun's luminosity
Concept
Q6372
photosphere
Concept
Q854050
effective temperature
Concept
Q2402166
Nu Puppis
CEL
+3.17^^http://www.w3.org/2001/XMLSchema#decimal
3.17
NUMBER
+8.78^^http://www.w3.org/2001/XMLSchema#decimal
8.78
NUMBER
+3.6^^http://www.w3.org/2001/XMLSchema#decimal
3.6
NUMBER
+27^^http://www.w3.org/2001/XMLSchema#decimal
27
NUMBER
+8^^http://www.w3.org/2001/XMLSchema#decimal
8
NUMBER
+0.011^^http://www.w3.org/2001/XMLSchema#decimal
0.011
NUMBER
+7^^http://www.w3.org/2001/XMLSchema#decimal
7
NUMBER
+0.152^^http://www.w3.org/2001/XMLSchema#decimal
0.152
NUMBER
+92^^http://www.w3.org/2001/XMLSchema#decimal
92
NUMBER
+31^^http://www.w3.org/2001/XMLSchema#decimal
31
NUMBER
instance of
constellation
apparent magnitude
instance of