Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Carina |
Right ascension | 08h 35m 19.70886s [1] |
Declination | −58° 00′ 33.2714″ [1] |
Apparent magnitude (V) | +4.84 [2] (5.08 + 8.02) [3] |
Characteristics | |
Spectral type | K0III [4] |
B−V color index | 0.981±0.041 [2] |
Astrometry | |
Radial velocity (Rv) | +25.62±0.13 [1] km/s |
Proper motion (μ) |
RA: +52.848±0.555
[1]
mas/
yr Dec.: +28.117±0.491 [1] mas/ yr |
Parallax (π) | 14.5139 ± 0.2692 mas [1] |
Distance | 225 ± 4
ly (69 ± 1 pc) |
Absolute magnitude (MV) | 0.68 [2] |
Details | |
A | |
Radius | 11.13+1.11 −0.39 [1] R☉ |
Luminosity | 64.4±1.4 [1] L☉ |
Temperature | 4,903+87 −229 [1] K |
Other designations | |
Database references | |
SIMBAD | data |
HD 73389 is a binary star [3] system in the constellation Carina. It has the Bayer designation e2 Carinae; HD 73389 is the identifier from the Henry Draper Catalogue. This system is visible to the naked eye as a point of light with a combined apparent visual magnitude of +4.84. [2] Based on parallax measurements, it is located at a distance of approximately 225 light years from the Sun. The system is drifting further away with a radial velocity of +25.6 km/s. [1]
The visual magnitude 5.08 primary, component A, is an aging K-type giant star with a stellar classification of K0III. [4] With the supply of hydrogen at its core exhausted, it has cooled and expanded to 11 times the Sun's radius. [1] It is radiating 64 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,903 K. [1] The secondary companion, component B, has a visual magnitude of 8.02 and is located at an angular separation of 0.30 ″ along a position angle of 207° from the primary, as of 2015. [6]