Chi Lupi

χ Lupi

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Lupus
Right ascension	15h 50m 57.5376s[1]
Declination	−33° 37′ 37.796″[1]
Apparent magnitude (V)	3.957[1]
Characteristics
Spectral type	B9.5V / A2Vm[2]
U−B color index	−0.13[3]
B−V color index	−0.04[3]
R−I color index	−0.07[3]
Astrometry
Radial velocity (Rv)	5 ± 20[1] km/s
Proper motion (μ)	RA: −5.92[1] mas/yr Dec.: −24.91[1] mas/yr
Parallax (π)	15.86 ± 0.84[1] mas
Distance	210 ± 10 ly (63 ± 3 pc)
Details
Radius	3.70[4] R☉
Rotational velocity (v sin i)	0[3] km/s
Other designations
χ Lup, Chi Lupi, Chi Lup, 5 Lupi, 5 Lup, CD−33 10754, CPD−33 3933, FK5 586, GC 21281, HD 141556, HIP 77634, HR 5883, PPM 294334, SAO 207040.[1]
Database references
SIMBAD	data

Chi Lupi (Chi Lup, χ Lupi, χ Lup) is a spectroscopic binary star in the constellation of Lupus.^[1] It has an apparent visual magnitude of approximately 3.957.^[1] The primary star in the binary is a mercury-manganese star of spectral type B9.5V; the secondary is a metallic-lined star of type A2Vm.^[2]

References

1. ^ ^{a b c d e f g h i j} HD 141556 -- Spectroscopic binary, database entry, SIMBAD. Accessed on line August 14, 2008.
2. ^ ^{a b} On the Ga II and Ga III Resonance Lines and the Implication for Chemical Stratification in HgMn Stars, K. E. Nielsen et al., Astronomical Journal 130, #5 (November 2005), pp. 2312–2317, Bibcode: 2005AJ....130.2312N, doi:10.1086/491703.
3. ^ ^{a b c d} HR 5883, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line August 14, 2008.
4. ^ HD 141556, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line August 14, 2008.