Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Lupus |
Right ascension | 15h 38m 03.20372s [1] |
Declination | −42° 34′ 02.4444″ [1] |
Apparent magnitude (V) | 4.33 [2] (4.33 + 11.0) [3] |
Characteristics | |
Spectral type | K4.5 III [4] |
U−B color index | +1.72 [2] |
B−V color index | +1.43 [2] |
Astrometry | |
Radial velocity (Rv) | −6.8±2.7 [5] km/s |
Proper motion (μ) |
RA: −21.37
[1]
mas/
yr Dec.: −29.98 [1] mas/ yr |
Parallax (π) | 8.97 ± 0.27 mas [1] |
Distance | 360 ± 10
ly (111 ± 3 pc) |
Absolute magnitude (MV) | +0.21 [6] |
Details | |
Radius | 40 [7] R☉ |
Luminosity | 167 [6] L☉ |
Other designations | |
Database references | |
SIMBAD | data |
Omega Lupi, Latinised from ω Lupi, is a double star in the southern constellation of Lupus. It is visible to the naked eye with an apparent visual magnitude of 4.33, [2] showing up as a red-hued star just to the south of Gamma Lupi. [9] Based upon an annual parallax shift of 8.97 [1] mas as seen from Earth, it is located around 360 light-years from the Sun.
As of 2007, the components of this system had an angular separation of 11.4 arcseconds along a position angle of 29°, [10] and are most likely gravitationally bound as a wide binary star system. [3] The primary component is a magnitude 4.48 evolved giant star with a stellar classification of K4.5 III. [4] The measured angular diameter, after correction for limb darkening, is 3.39±0.04 mas. [11] At the estimated distance of Omega Lupi, this yields a physical size of about 40 times the radius of the Sun. [7] The companion is a magnitude 11.0 star. [3]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Lupus |
Right ascension | 15h 38m 03.20372s [1] |
Declination | −42° 34′ 02.4444″ [1] |
Apparent magnitude (V) | 4.33 [2] (4.33 + 11.0) [3] |
Characteristics | |
Spectral type | K4.5 III [4] |
U−B color index | +1.72 [2] |
B−V color index | +1.43 [2] |
Astrometry | |
Radial velocity (Rv) | −6.8±2.7 [5] km/s |
Proper motion (μ) |
RA: −21.37
[1]
mas/
yr Dec.: −29.98 [1] mas/ yr |
Parallax (π) | 8.97 ± 0.27 mas [1] |
Distance | 360 ± 10
ly (111 ± 3 pc) |
Absolute magnitude (MV) | +0.21 [6] |
Details | |
Radius | 40 [7] R☉ |
Luminosity | 167 [6] L☉ |
Other designations | |
Database references | |
SIMBAD | data |
Omega Lupi, Latinised from ω Lupi, is a double star in the southern constellation of Lupus. It is visible to the naked eye with an apparent visual magnitude of 4.33, [2] showing up as a red-hued star just to the south of Gamma Lupi. [9] Based upon an annual parallax shift of 8.97 [1] mas as seen from Earth, it is located around 360 light-years from the Sun.
As of 2007, the components of this system had an angular separation of 11.4 arcseconds along a position angle of 29°, [10] and are most likely gravitationally bound as a wide binary star system. [3] The primary component is a magnitude 4.48 evolved giant star with a stellar classification of K4.5 III. [4] The measured angular diameter, after correction for limb darkening, is 3.39±0.04 mas. [11] At the estimated distance of Omega Lupi, this yields a physical size of about 40 times the radius of the Sun. [7] The companion is a magnitude 11.0 star. [3]