Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Lupus |
Right ascension | 15h 24m 45.00855s [1] |
Declination | −39° 42′ 36.9524″ [1] |
Apparent magnitude (V) | 5.37 [2] (5.37 + 10.90) [3] |
Characteristics | |
Spectral type | A0p Si [4] |
B−V color index | −0.11 [2] |
Astrometry | |
Radial velocity (Rv) | −7.6±2.8 [5] km/s |
Proper motion (μ) |
RA: −26.10
[1]
mas/
yr Dec.: −54.77 [1] mas/ yr |
Parallax (π) | 8.02 ± 0.62 mas [1] |
Distance | 410 ± 30
ly (125 ± 10 pc) |
Absolute magnitude (MV) | −0.10 [6] |
Details | |
υ Lup A | |
Luminosity | 113 [7] L☉ |
Temperature | 10,049 [7] K |
Rotational velocity (v sin i) | 0 [8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Upsilon Lupi, Latinized from υ Lupi, is a star system in the southern constellation of Lupus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.37. [2] Based upon an annual parallax shift of 8.02 [1] mas as seen from Earth, it is located around 410 light years from the Sun. The two components of Upsilon Lupi share a common proper motion through space and most likely form a wide binary star system. [10] As of 1945, the pair had an angular separation of 1.50 arc seconds along a position angle of 40°. [3]
The brighter member, component A, is a chemically peculiar Ap star with a stellar classification of A0p Si, [4] where the 'Si' suffix indicates an abnormal abundance of silicon in the star's photosphere. A magnetic field has been detected with a quadratic field strength of (764.7±311.3)×10−4 T. [11] The star is radiating 113 times the solar luminosity from its outer atmosphere at an effective temperature of 10,049 K. [7]
The magnitude 10.9 companion star, component B, has a visual magnitude of 10.90. [3] It may be the source of the X-ray emission detected coming from these coordinates. [12]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Lupus |
Right ascension | 15h 24m 45.00855s [1] |
Declination | −39° 42′ 36.9524″ [1] |
Apparent magnitude (V) | 5.37 [2] (5.37 + 10.90) [3] |
Characteristics | |
Spectral type | A0p Si [4] |
B−V color index | −0.11 [2] |
Astrometry | |
Radial velocity (Rv) | −7.6±2.8 [5] km/s |
Proper motion (μ) |
RA: −26.10
[1]
mas/
yr Dec.: −54.77 [1] mas/ yr |
Parallax (π) | 8.02 ± 0.62 mas [1] |
Distance | 410 ± 30
ly (125 ± 10 pc) |
Absolute magnitude (MV) | −0.10 [6] |
Details | |
υ Lup A | |
Luminosity | 113 [7] L☉ |
Temperature | 10,049 [7] K |
Rotational velocity (v sin i) | 0 [8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Upsilon Lupi, Latinized from υ Lupi, is a star system in the southern constellation of Lupus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.37. [2] Based upon an annual parallax shift of 8.02 [1] mas as seen from Earth, it is located around 410 light years from the Sun. The two components of Upsilon Lupi share a common proper motion through space and most likely form a wide binary star system. [10] As of 1945, the pair had an angular separation of 1.50 arc seconds along a position angle of 40°. [3]
The brighter member, component A, is a chemically peculiar Ap star with a stellar classification of A0p Si, [4] where the 'Si' suffix indicates an abnormal abundance of silicon in the star's photosphere. A magnetic field has been detected with a quadratic field strength of (764.7±311.3)×10−4 T. [11] The star is radiating 113 times the solar luminosity from its outer atmosphere at an effective temperature of 10,049 K. [7]
The magnitude 10.9 companion star, component B, has a visual magnitude of 10.90. [3] It may be the source of the X-ray emission detected coming from these coordinates. [12]