Global InformationXi2 Lupi information
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 56m 54.12100s[1] |
| Declination | −33° 57′ 51.3448″[1] |
| Apparent magnitude (V) | 5.55[2] |
| Characteristics | |
| Spectral type | B9 V[3] |
| B−V color index | +0.06[2] |
| Astrometry | |
| Radial velocity (Rv) | −12.20±1.78[4] km/s |
| Proper motion (μ) | RA: +23.56[1] mas/yr Dec.: −43.29[1] mas/yr |
| Parallax (π) | 21.71 ± 4.70 mas[1] |
| Distance | approx. 150 ly (approx. 46 pc) |
| Details | |
| Mass | 2.38[5] M☉ |
| Luminosity | 10.6[6] L☉ |
| Surface gravity (log g) | 4.22±0.14[5] cgs |
| Temperature | 9,725±331[5] K |
| Rotational velocity (v sin i) | 184[5] km/s |
| Age | 381[5] Myr |
| Other designations | |
ξ2 Lup, CD−33° 10826B, HD 142630, HIP 78106, HR 5926, SAO 207145, WDS J15569-3358B.[7] | |
| Database references | |
| SIMBAD | data |
Xi2 Lupi (ξ2 Lup, ξ2 Lupi) is a member of a double star[8] 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°.[9] Xi2 Lupi is visible to the naked eye with an apparent visual magnitude of 5.55.[2] Based upon an annual parallax shift of 21.71[1] 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.[10]
This is a B-type main-sequence star with a stellar classification of B9 V.[3] It has an estimated 2.38[5] times the mass of the Sun and radiates 10.6[6] times the Sun's luminosity from its outer atmosphere at an effective temperature of 9,725 K.[5] Xi2 Lupi is about 381 million years old and is spinning relatively rapidly with a projected rotational velocity of 184 km/s.[5]
- ^ a b c d e f Cite error: The named reference
vanLeeuwen2007was invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
tycho2was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
Levato1975was invoked but never defined (see the help page). - ^ Cite error: The named reference
deBruijne2012was invoked but never defined (see the help page). - ^ a b c d e f g h Cite error: The named reference
David2015was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
Mcdonald2012was invoked but never defined (see the help page). - ^ Cite error: The named reference
SIMBADwas invoked but never defined (see the help page). - ^ Cite error: The named reference
Eggleton2008was invoked but never defined (see the help page). - ^ Cite error: The named reference
Sinachopoulos2007was invoked but never defined (see the help page). - ^ Cite error: The named reference
Tetzlaff2011was invoked but never defined (see the help page).