Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Lupus |
Right ascension | 15h 08m 50.61639s [1] |
Declination | −45° 16′ 47.4950″ [1] |
Apparent magnitude (V) | 4.04 [2] (4.43 + 5.23) [3] |
Characteristics | |
Spectral type | B3 V [4] (B3 V + B3 V) [5] |
U−B color index | −0.67 [2] |
B−V color index | −0.18 [2] |
Astrometry | |
Radial velocity (Rv) | +9.80±1.78 [6] km/s |
Proper motion (μ) |
RA: −15.88
[1]
mas/
yr Dec.: −26.80 [1] mas/ yr |
Parallax (π) | 4.20 ± 0.66 mas [1] |
Distance | approx. 800
ly (approx. 240 pc) |
Absolute magnitude (MV) | −2.75 [7] |
Orbit [8] | |
Period (P) | 70.8±0.8 yr |
Semi-major axis (a) | 0.2597±0.0021″ |
Eccentricity (e) | 0.6283±0.0090 |
Inclination (i) | 71.59±0.41° |
Longitude of the node (Ω) | 26.64±0.61° |
Periastron epoch (T) | 1997.907 ± 0.105 |
Argument of periastron (ω) (secondary) | 299.9±1.1° |
Details | |
λ Lup A | |
Mass | 8.14 [8] M☉ |
Rotational velocity (v sin i) | 135 km/s |
Age | 28.1±4.1 [9] Myr |
λ Lup B | |
Mass | 5.84 M☉ |
Other designations | |
Database references | |
SIMBAD | data |
Lambda Lupi, Latinized from λ Lupi, is a triple star [11] system in the southern constellation of Lupus. It is visible to the naked eye with a combined apparent visual magnitude of 4.04. [2] Based upon an annual parallax shift of just 4.20 [1] mas as seen from Earth, it is located roughly 800 light years from the Sun. The system has a peculiar velocity of 27.4±4.9 km/s relative to its neighbors, making it a candidate runaway star system. [9] It is a member of the Upper Centaurus–Lupus sub-group in the Scorpius–Centaurus OB association. [12]
The two visible components of this system orbit each other over a period of 70.8 years with a large eccentricity of 0.63. [8] The primary component has a visual magnitude of 4.43, while the secondary is of magnitude 5.23. [3] Both are B-type main sequence stars with a stellar classification of B3 V. [5] One of the pair is itself a double-lined spectroscopic binary, making this a triple star system. [11]
{{
cite web}}
: CS1 maint: postscript (
link)
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Lupus |
Right ascension | 15h 08m 50.61639s [1] |
Declination | −45° 16′ 47.4950″ [1] |
Apparent magnitude (V) | 4.04 [2] (4.43 + 5.23) [3] |
Characteristics | |
Spectral type | B3 V [4] (B3 V + B3 V) [5] |
U−B color index | −0.67 [2] |
B−V color index | −0.18 [2] |
Astrometry | |
Radial velocity (Rv) | +9.80±1.78 [6] km/s |
Proper motion (μ) |
RA: −15.88
[1]
mas/
yr Dec.: −26.80 [1] mas/ yr |
Parallax (π) | 4.20 ± 0.66 mas [1] |
Distance | approx. 800
ly (approx. 240 pc) |
Absolute magnitude (MV) | −2.75 [7] |
Orbit [8] | |
Period (P) | 70.8±0.8 yr |
Semi-major axis (a) | 0.2597±0.0021″ |
Eccentricity (e) | 0.6283±0.0090 |
Inclination (i) | 71.59±0.41° |
Longitude of the node (Ω) | 26.64±0.61° |
Periastron epoch (T) | 1997.907 ± 0.105 |
Argument of periastron (ω) (secondary) | 299.9±1.1° |
Details | |
λ Lup A | |
Mass | 8.14 [8] M☉ |
Rotational velocity (v sin i) | 135 km/s |
Age | 28.1±4.1 [9] Myr |
λ Lup B | |
Mass | 5.84 M☉ |
Other designations | |
Database references | |
SIMBAD | data |
Lambda Lupi, Latinized from λ Lupi, is a triple star [11] system in the southern constellation of Lupus. It is visible to the naked eye with a combined apparent visual magnitude of 4.04. [2] Based upon an annual parallax shift of just 4.20 [1] mas as seen from Earth, it is located roughly 800 light years from the Sun. The system has a peculiar velocity of 27.4±4.9 km/s relative to its neighbors, making it a candidate runaway star system. [9] It is a member of the Upper Centaurus–Lupus sub-group in the Scorpius–Centaurus OB association. [12]
The two visible components of this system orbit each other over a period of 70.8 years with a large eccentricity of 0.63. [8] The primary component has a visual magnitude of 4.43, while the secondary is of magnitude 5.23. [3] Both are B-type main sequence stars with a stellar classification of B3 V. [5] One of the pair is itself a double-lined spectroscopic binary, making this a triple star system. [11]
{{
cite web}}
: CS1 maint: postscript (
link)