Pi Lupi
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 05m 07.08596s[1] |
| Declination | −47° 03′ 04.4976″[1] |
| Apparent magnitude (V) | 3.89[2] |
| Characteristics | |
| Spectral type | B5V + B5IV[3] |
| U−B color index | −0.59[2] |
| B−V color index | −0.14[2] |
| Astrometry | |
| Radial velocity (Rv) | +4.50[4] km/s |
| Proper motion (μ) | RA: −22.98[1] mas/yr Dec.: −22.81[1] mas/yr |
| Parallax (π) | 7.36 ± 0.55 mas[1] |
| Distance | 440 ± 30 ly (140 ± 10 pc) |
| Other designations | |
| pi Lup A: HD 133243, HR 5605 | |
| pi Lup B: HD 133243, HR 5606 | |
| Database references | |
| SIMBAD | data |
π Lupi is a multiple star system in the southern constellation Lupus. Two components form a wide binary pair with an orbital period of 517 years and a semimajor axis of 1.59″. At least one of the components is a spectroscopic binary. They belong to the Upper Centaurus Lupus component of the Sco–Cen Complex.[3]
References
- ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357Vizier catalog entry
- ^ a b c Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N
- ^ a b Nitschelm, C. (December 2004), Hilditch, R. W.; Hensberge, H.; Pavlovski, K. (eds.), "Discovery and confirmation of some double-lined spectroscopic binaries in the Sco-Cen Complex", Spectroscopically and Spatially Resolving the Components of the Close Binary Stars, Proceedings of the Workshop held 20-24 October 2003 in Dubrovnik, Croatia., ASP Conference Series, vol. 318, Astronomical Society of the Pacific, pp. 291−293, Bibcode:2004ASPC..318..291N
- ^ Kharchenko, N. V.; et al. (2007), "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations", Astronomische Nachrichten, 328 (9): 889, arXiv:0705.0878, Bibcode:2007AN....328..889K, doi:10.1002/asna.200710776
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External links
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