PP Carinae
p Carinae is the Bayer designation of a star in the southern constellation of Carina. It has the variable star designation PP Carinae and, at an apparent visual magnitude of +3.3, is readily visible to the naked eye from the southern hemisphere. From the observed parallax shift of this star as the Earth orbits the Sun, its distance can be estimated as roughly with a 6% margin of error. It is considered to be a member of the open cluster IC 2602 although it lies well outside the core visible group of stars.

The star is a B-type main sequence star with a stellar classification of B4 Vne. The 'ne' suffix indicates it is a rapidly rotating Be star that is surrounded by hot circumstellar gas. This material adds emission lines to the spectrum of the star. It has a projected rotational velocity of , with about 7.6 times the mass and 6 times the radius of the Sun. This star is classified as a Gamma Cassiopeiae-type variable and its brightness varies from magnitude +3.22 to +3.55.

In most versions of its asterism, the neighbouring bright stars, thus plotted along the imaginary hull forming Carina are Theta Carinae, to the south, and V337 (also known as lower case q) Carinae to the east, of second and third magnitude respectively.
Q105616
Bayer designation
Concept
Q523
star
Concept
Q8928
constellation
Concept
Q10470
Carina
CEL
Q593448
variable star designation
Concept
Q124313
apparent visual magnitude
Concept
Q165074
parallax
Concept
Q1352827
margin of error
Concept
Q11387
open cluster
Concept
Q50050
IC 2602
CEL
Q767432
B-type main sequence star
Concept
Q25377588
stellar classification
Concept
Q812800
Be star
Concept
Q212111
emission line
Concept
Q752171
spectrum
Concept
Q6464
projected rotational velocity
Concept
Q60788292
Gamma Cassiopeiae-type
Concept
Q6243
variable
Concept
Q1202466
Theta Carinae
CEL
Q973324
V337 (also known as lower case q) Carinae
CEL
Q768321
PP Carinae
CEL
2602-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2602
DATE
++3.3^^http://www.w3.org/2001/XMLSchema#decimal
+3.3
NUMBER
+6^^http://www.w3.org/2001/XMLSchema#decimal
6
NUMBER
+4^^http://www.w3.org/2001/XMLSchema#decimal
4
NUMBER
+7.6^^http://www.w3.org/2001/XMLSchema#decimal
7.6
NUMBER
+6^^http://www.w3.org/2001/XMLSchema#decimal
6
NUMBER
++3.22^^http://www.w3.org/2001/XMLSchema#decimal
+3.22
NUMBER
++3.55^^http://www.w3.org/2001/XMLSchema#decimal
+3.55
NUMBER
+337^^http://www.w3.org/2001/XMLSchema#decimal
337
NUMBER
instance of
constellation
part of
instance of
instance of