Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Lupus |
Right ascension | 15h 50m 57.5376s [1] |
Declination | −33° 37′ 37.796″ [1] |
Apparent magnitude (V) | 3.957 [1] |
Characteristics | |
Spectral type | B9.5V + A2Vm [2] |
U−B color index | −0.13 [3] |
B−V color index | −0.04 [3] |
R−I color index | −0.07 [3] |
Astrometry | |
Radial velocity (Rv) | 5 ± 20 [1] km/s |
Proper motion (μ) |
RA: −5.92
[1]
mas/
yr Dec.: −24.91 [1] mas/ yr |
Parallax (π) | 15.86 ± 0.84 mas [1] |
Distance | 210 ± 10
ly (63 ± 3 pc) |
Details [4] | |
χ Lup A | |
Mass | 2.84±0.12 M☉ |
Radius | 2.85±0.15 R☉ |
Luminosity | 63 [5] L☉ |
Surface gravity (log g) | 4.08 [5] cgs |
Temperature | 10,200 [5] K |
Rotational velocity (v sin i) | 0 [3] km/s |
Age | 280±30 Myr |
χ Lup B | |
Mass | 1.94±0.09 M☉ |
Radius | 1.75±0.18 R☉ |
Surface gravity (log g) | 4.2 cgs |
Temperature | 9,200 K |
Other designations | |
Database references | |
SIMBAD | data |
Chi Lupi (Chi Lup, χ Lupi, χ Lup) is a spectroscopic binary star in the constellation of Lupus. [1] It has an apparent visual magnitude of approximately 3.957. [1] The primary star in the binary is a mercury-manganese star of spectral type B9.5V; the secondary is a metallic-lined star of type A2Vm. [2]
This system is a proper motion member of the Upper Scorpius sub-group in the Scorpius–Centaurus OB association, the nearest such co-moving association of massive stars to the Sun. [5] The Upper Scorpius subgroup contains thousands of stars with an average age of 11 million years old at mean distances of 145 parsecs (470 light years). [6]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Lupus |
Right ascension | 15h 50m 57.5376s [1] |
Declination | −33° 37′ 37.796″ [1] |
Apparent magnitude (V) | 3.957 [1] |
Characteristics | |
Spectral type | B9.5V + A2Vm [2] |
U−B color index | −0.13 [3] |
B−V color index | −0.04 [3] |
R−I color index | −0.07 [3] |
Astrometry | |
Radial velocity (Rv) | 5 ± 20 [1] km/s |
Proper motion (μ) |
RA: −5.92
[1]
mas/
yr Dec.: −24.91 [1] mas/ yr |
Parallax (π) | 15.86 ± 0.84 mas [1] |
Distance | 210 ± 10
ly (63 ± 3 pc) |
Details [4] | |
χ Lup A | |
Mass | 2.84±0.12 M☉ |
Radius | 2.85±0.15 R☉ |
Luminosity | 63 [5] L☉ |
Surface gravity (log g) | 4.08 [5] cgs |
Temperature | 10,200 [5] K |
Rotational velocity (v sin i) | 0 [3] km/s |
Age | 280±30 Myr |
χ Lup B | |
Mass | 1.94±0.09 M☉ |
Radius | 1.75±0.18 R☉ |
Surface gravity (log g) | 4.2 cgs |
Temperature | 9,200 K |
Other designations | |
Database references | |
SIMBAD | data |
Chi Lupi (Chi Lup, χ Lupi, χ Lup) is a spectroscopic binary star in the constellation of Lupus. [1] It has an apparent visual magnitude of approximately 3.957. [1] The primary star in the binary is a mercury-manganese star of spectral type B9.5V; the secondary is a metallic-lined star of type A2Vm. [2]
This system is a proper motion member of the Upper Scorpius sub-group in the Scorpius–Centaurus OB association, the nearest such co-moving association of massive stars to the Sun. [5] The Upper Scorpius subgroup contains thousands of stars with an average age of 11 million years old at mean distances of 145 parsecs (470 light years). [6]