HD 75063

This article is about a Velorum. For A Velorum, see HD 72108.

HD 75063

Observation data Epoch J2000.0       Equinox J2000.0
Constellation	Vela [1]
Right ascension	08h 46m 01.64391s [2]
Declination	−46° 02′ 29.5042″ [2]
Apparent magnitude  (V)	3.87 [1]
Characteristics
Spectral type	A1III [3] or A0 II [4]
B−V color index	0.015±0.029 [1]
Astrometry
Radial velocity (Rv)	+23.2±0.3 [1] km/s
Proper motion (μ)	RA: −12.82 [2] mas/yr Dec.: +4.23 [2] mas/yr
Parallax (π)	1.76±0.14  mas [2]
Distance	1,900 ± 100  ly (570 ± 50  pc)
Absolute magnitude  (MV)	−4.89 [1]
Details
Mass	8.6±0.3 [5]   M☉
Radius	41 [6]   R☉
Luminosity	6,800 [6]   L☉
Temperature	8,195 [6]   K
Rotational velocity (v sin i)	30 [7]  km/s
Age	30.6±2.6 [5]   Myr
Other designations
a Vel, CD−45°4517, HD 75063, HIP 43023, HR 3487, SAO 220422 [8]
Database references
SIMBAD	data

HD 75063 is a single ^[9] star in the southern constellation of Vela. It has the Bayer designation of a Velorum, while HD 75063 is the identifier from the Henry Draper Catalogue. This is a naked-eye star with an apparent visual magnitude of 3.87 ^[1] and has a white hue. The star is located at a distance of approximately 1,900  light-years from the Sun based on parallax measurements and has an absolute magnitude of −4.89. ^[1] It is drifting further away with a radial velocity of +23 km/s. ^[1]

This object has been stellar classifications of A1III ^[3] and A0 II, ^[4] matching a massive A-type giant or bright giant star, respectively. It is an estimated 31 million years old ^[5] and is spinning with a projected rotational velocity of 30 km/s. ^[7] The star has 8.6 times the mass of the Sun ^[5] and around 4.5 times the Sun's radius. The star is radiating 6,800 times the Sun's luminosity from its photosphere at an effective temperature of 8,195  K . ^[5]

References

1. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
2. 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:10.1051/0004-6361:20078357. S2CID   18759600. Vizier catalog entry
3. Levato, O. H. (August 1972). "Rotational Velocities and Spectral Types of Some A-Type Stars". Publications of the Astronomical Society of the Pacific. 84 (500): 584. Bibcode:1972PASP...84..584L. doi: 10.1086/129336 .
4. Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 2. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
5. Tetzlaff, N.; et al. (January 2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society . 410 (1): 190–200. arXiv: 1007.4883 . Bibcode:2011MNRAS.410..190T. doi: 10.1111/j.1365-2966.2010.17434.x . S2CID   118629873.
6. McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017-10-01). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv: 1706.02208 . Bibcode:2017MNRAS.471..770M. doi: 10.1093/mnras/stx1433 . ISSN   0035-8711. a Velorum's database entry at VizieR.
7. Royer, F.; et al. (May 2002). "Rotational velocities of A-type stars II. Measurement of vsini in the northern hemisphere". Astronomy & Astrophysics. 393: 897–912. arXiv: astro-ph/0205255 . Bibcode:2002A&A...393..897R. doi:10.1051/0004-6361:20020943. S2CID   14070763.
8. "a Vel". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-01-22.
9. 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 . S2CID   14878976.