R Carinae
R Carinae is a double star in the southern constellation of Carina. The brighter component is a variable star that can be viewed with the naked eye at peak brightness, but is usually too faint to be seen without a telescope, having an apparent visual magnitude that fluctuates around 7.43. This star is located at a distance of approximately 1,300 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +28 km/s.

The main component is an aging red giant star on the asymptotic giant branch with a stellar classification of M6/7pe. It is classified as a pulsating Mira type variable star and its visual brightness varies with an average amplitude of 4.25 magnitudes over a period of . Its average maximum visual magnitude is , but the brightest observed maximum was magnitude 3.9 This star is surrounded by a dusty shell, with properties that are consistent with iron-poor silicates or corundum, extending from around three stellar radii outward.

The companion is a magnitude 11.30 star at an angular separation of along a position angle of 132° from the main star, as of 2015.
Q13890
double star
Concept
Q8928
constellation
Concept
Q10470
Carina
CEL
Q6243
variable star
Concept
Q124313
apparent visual magnitude
Concept
Q531
light year
Concept
Q525
Sun
CEL
Q906561
parallax
Concept
Q240105
radial velocity
Concept
Q50081
red giant
Concept
Q50089
asymptotic giant branch
Concept
Q25377588
stellar classification
Concept
Q744691
Mira type
CEL
Q6243
variable star
Concept
Q124313
visual brightness
Concept
Q7130787
silicate
Concept
Q131777
corundum
Concept
Q1357788
angular separation
Concept
Q2105737
position angle
UNK
Q3781801
R Carinae
CEL
2015-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2015
DATE
+7.43^^http://www.w3.org/2001/XMLSchema#decimal
7.43
NUMBER
++28^^http://www.w3.org/2001/XMLSchema#decimal
+28
NUMBER
+6^^http://www.w3.org/2001/XMLSchema#decimal
6
NUMBER
+7^^http://www.w3.org/2001/XMLSchema#decimal
7
NUMBER
+4.25^^http://www.w3.org/2001/XMLSchema#decimal
4.25
NUMBER
+3.9^^http://www.w3.org/2001/XMLSchema#decimal
3.9
NUMBER
+11.30^^http://www.w3.org/2001/XMLSchema#decimal
11.30
NUMBER
constellation
instance of