HD 63032

c Puppis, also known as HD 63032 and HR 3017, is a spectroscopic binary star[3] in the constellation Puppis. Its apparent magnitude is 3.61.[2] Located around 347 parsecs (1,130 ly) distant, the primary is an orange-red bright giant or supergiant of spectral type K2.5Ib-IIa or K5IIa,[3] while the secondary, discovered in 1983,[6] is a blue main-sequence star of spectral type B9V.[3] The system is the brightest member of the open cluster NGC 2451, over two magnitudes brighter than every other star in the cluster. As the turnoff point of the cluster is currently around B7, the parameters of the system fit with cluster membership.[6]

c Puppis

The field of cluster NGC 2451; c Puppis is the brightest star in the frame
Observation data Epoch J2000      Equinox J2000
Constellation	Puppis
Right ascension	07^h 45^m 15.29642^s[1]
Declination	−37° 58′ 06.8998″[1]
Apparent magnitude (V)	3.61[2]
Characteristics
Spectral type	K2.5Ib-IIa（K5IIa） + B9V[3]
Apparent magnitude (U)	7.06[2]
Apparent magnitude (B)	5.34[2]
Apparent magnitude (R)	2.26[2]
Apparent magnitude (I)	1.26[2]
Apparent magnitude (J)	0.68[2]
Apparent magnitude (H)	-0.075 ± 0.220[4]
Apparent magnitude (K)	-0.47[4]
U−B color index	1.72
B−V color index	1.73
Astrometry
Radial velocity (Rv)	16.83 ± 0.14[5] km/s
Proper motion (μ)	RA: -10.18±0.18[1] mas/yr Dec.: 6.34±0.21[1] mas/yr
Parallax (π)	2.88 ± 0.19[1] mas
Distance	1,130 ± 70 ly (350 ± 20 pc)
Details
Mass	9.8 ± 2.1/2.8 ± 0.2 M☉
Radius	202 ± 25/2.4 ± 0.1 R☉
Luminosity	9600 ± 1700/65 ± 4 L☉
Temperature	A:4000 ± 150/B:10,200 ± 300[6] K
Other designations
CD−37 3863, CPD−37 1558, HD 63032, HIP 37819, HR 3017, SAO 198398
Database references
SIMBAD	data

References

1. van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
2. Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode:2002yCat.2237....0D.
3. Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x.
4. Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". VizieR On-line Data Catalog: II/246. Originally Published in: 2003yCat.2246....0C. 2246: 0. Bibcode:2003yCat.2246....0C.
5. Mermilliod, J. C.; Mayor, M.; Udry, S. (2008), "Red giants in open clusters. XIV. Mean radial velocities for 1309 stars and 166 open clusters" (PDF), Astronomy and Astrophysics, 485 (1): 303–314, Bibcode:2008A&A...485..303M, doi:10.1051/0004-6361:200809664
6. Groote, D.; Reimers, D. (1983). "Detection of a late B star companion of the bright cluster giant c Pup = HD 63032". Astronomy and Astrophysics. 119 (2): 319–320. Bibcode:1983A&A...119..319G.