Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Carina |
Right ascension | 09h 32m 14.59964s [2] |
Declination | −62° 47′ 20.0452″ [2] |
Apparent magnitude (V) | 3.9 - 10.5 [3] |
Characteristics | |
Evolutionary stage | AGB [4] |
Spectral type | M6/7pe [5] |
B−V color index | 0.906±0.009 [6] |
Variable type | Mira [3] |
Astrometry | |
Radial velocity (Rv) | +28.1±1.0 [6] km/s |
Proper motion (μ) |
RA: −37.900
[2]
mas/
yr Dec.: +22.232 [2] mas/ yr |
Parallax (π) | 2.5813 ± 0.4460 mas [2] |
Distance | approx. 1,300
ly (approx. 390 pc) |
Absolute magnitude (MV) | 1.48 [6] (at mv = 7.43) |
Details | |
Mass | 0.87+0.47 −0.31 [4] M☉ |
Radius | 241.0+37.6 −32.6 [4] R☉ |
Luminosity | 4,571+1,331 −1,031 [4] L☉ |
Temperature | 2,800 [7] K |
Other designations | |
Database references | |
SIMBAD | data |
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, [9] but is usually too faint to be seen without a telescope, having an apparent visual magnitude that fluctuates around 7.43. [6] 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. [6]
The main component is an aging red giant star on the asymptotic giant branch [4] with a stellar classification of M6/7pe. [5] 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 303.99±1.08 d. Its average maximum visual magnitude is 5.05±0.45, [9] but the brightest observed maximum was magnitude 3.9 [3] 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. [10]
The companion is a magnitude 11.30 star at an angular separation of 2.10 ″ along a position angle of 132° from the main star, as of 2015. [11]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Carina |
Right ascension | 09h 32m 14.59964s [2] |
Declination | −62° 47′ 20.0452″ [2] |
Apparent magnitude (V) | 3.9 - 10.5 [3] |
Characteristics | |
Evolutionary stage | AGB [4] |
Spectral type | M6/7pe [5] |
B−V color index | 0.906±0.009 [6] |
Variable type | Mira [3] |
Astrometry | |
Radial velocity (Rv) | +28.1±1.0 [6] km/s |
Proper motion (μ) |
RA: −37.900
[2]
mas/
yr Dec.: +22.232 [2] mas/ yr |
Parallax (π) | 2.5813 ± 0.4460 mas [2] |
Distance | approx. 1,300
ly (approx. 390 pc) |
Absolute magnitude (MV) | 1.48 [6] (at mv = 7.43) |
Details | |
Mass | 0.87+0.47 −0.31 [4] M☉ |
Radius | 241.0+37.6 −32.6 [4] R☉ |
Luminosity | 4,571+1,331 −1,031 [4] L☉ |
Temperature | 2,800 [7] K |
Other designations | |
Database references | |
SIMBAD | data |
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, [9] but is usually too faint to be seen without a telescope, having an apparent visual magnitude that fluctuates around 7.43. [6] 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. [6]
The main component is an aging red giant star on the asymptotic giant branch [4] with a stellar classification of M6/7pe. [5] 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 303.99±1.08 d. Its average maximum visual magnitude is 5.05±0.45, [9] but the brightest observed maximum was magnitude 3.9 [3] 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. [10]
The companion is a magnitude 11.30 star at an angular separation of 2.10 ″ along a position angle of 132° from the main star, as of 2015. [11]