Pi Lupi

π Lup
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[1] mas
Distance440 ± 30 ly
(140 ± 10 pc)
Other designations
CD-46° 9773, HIP 73807, SAO 225426.
pi Lup A: HD 133243, HR 5605
pi Lup B: HD 133243, HR 5606
Database references
SIMBADdata

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

  1. 1 2 3 4 5 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
  2. 1 2 3 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
  3. 1 2 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 (Astronomical Society of the Pacific) 318, pp. 291−293, Bibcode:2004ASPC..318..291N
  4. 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

External links

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