Xi2 Lupi
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 56m 54.12100s |
| Declination | −33° 57′ 51.3448″ |
| Apparent magnitude (V) | 5.55 |
| Characteristics | |
| Spectral type | B9 V |
| B−V color index | +0.06 |
| Astrometry | |
| Radial velocity (Rv) | −12.20±1.78 km/s |
| Proper motion (μ) | RA: +23.56 mas/yr Dec.: −43.29 mas/yr |
| Parallax (π) | 21.71±4.70 mas |
| Distance | approx. 150 ly (approx. 46 pc) |
| Details | |
| Mass | 2.38 M☉ |
| Luminosity | 10.6 L☉ |
| Surface gravity (log g) | 4.22±0.14 cgs |
| Temperature | 9,725±331 K |
| Rotational velocity (v sin i) | 184 km/s |
| Age | 381 Myr |
| Other designations | |
| ξ2 Lup, CD−33°10826B, HD 142630, HIP 78106, HR 5926, SAO 207145, WDS J15569-3358B | |
| Database references | |
| SIMBAD | data |
Xi2 Lupi (ξ2 Lup, ξ2 Lupi) is a member of a double star with Xi1 Lupi in the southern constellation of Lupus. As of 2004, the pair had an angular separation of 10.254 arcseconds along a position angle of 49.21°. Xi2 Lupi is visible to the naked eye with an apparent visual magnitude of 5.55. Based upon an annual parallax shift of 21.71 mas as seen from Earth, it is located roughly 150 light-years from the Sun. It has a peculiar velocity of 14.3±1.9 km/s relative to its neighbors, and is probably (86% chance) a runaway star.
This is a B-type main-sequence star with a stellar classification of B9 V. It has an estimated 2.38 times the mass of the Sun and radiates 10.6 times the Sun's luminosity from its outer atmosphere at an effective temperature of 9,725 K. Xi2 Lupi is about 381 million years old and is spinning relatively rapidly with a projected rotational velocity of 184 km/s.