HD 101570

HD 101570
Observation data; Epoch J2000 Equinox J2000
Constellation	Centaurus
Right ascension	11h 40m 53.63243s[1]
Declination	−62° 05′ 24.3609″[1]
Apparent magnitude (V)	4.93[2]
Characteristics
Spectral type	G3Ib[3]
B−V color index	1.111±0.054[2]
Astrometry
Radial velocity (Rv)	+18.32±0.39[1] km/s
Proper motion (μ)	RA: −14.899±0.289[1] mas/yr ; Dec.: +0.681±0.371[1] mas/yr
Parallax (π)	2.9079 ± 0.1866[1] mas
Distance	1,120 ± 70 ly ; (340 ± 20 pc)
Absolute magnitude (MV)	−2.24[2]
Details
Radius	62.37+4.26; −7.96[1] R☉
Luminosity	1,641±120[1] L☉
Temperature	4,652+329; −151[1] K
Rotational velocity (v sin i)	21.4±2.1[4] km/s
Other designations
	CD−61°3145, GC 16037, HD 101570, HIP 56986, HR 4499, SAO 251535[5]
Database references
SIMBAD	data

HD 101570 is a single[6] star in the southern constellation of Centaurus. It has a yellow hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.93.[2] The star is located at a distance of approximately 1,120 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +18 km/s.[1] It has an absolute magnitude of −2.24.[2]

This is an aging supergiant star with a stellar classification of G3Ib.[3] Having exhausted the supply of hydrogen at its core, the star has expanded to 62[1] times the radius of the Sun. It has an abnormally high rate of rotation for its evolutionary state, showing a projected rotational velocity of 21.4 km/s.[7] The star is radiating 1,641 times the luminosity of the Sun from its photosphere at an effective temperature of 4,652 K.[1]

References

Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
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.
Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
De Medeiros, J. R.; et al. (November 2002). "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars". Astronomy and Astrophysics. 395: 97–98. Bibcode:2002A&A...395...97D. doi:10.1051/0004-6361:20021214.
"HD 101570". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-08-01.
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.
Rodrigues da Silva, R.; et al. (March 2015). "On the Nature of Rapidly Rotating Single Evolved Stars". The Astrophysical Journal. 801 (1): 6. arXiv:1503.03447. Bibcode:2015ApJ...801...54R. doi:10.1088/0004-637X/801/1/54. 54.

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[GaiaDR2-1] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[Anderson2012-2] 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.

[Houk1979-3] Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.

[DeMedeiros2002-4] De Medeiros, J. R.; et al. (November 2002). "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars". Astronomy and Astrophysics. 395: 97–98. Bibcode:2002A&A...395...97D. doi:10.1051/0004-6361:20021214.

[SIMBAD-5] "HD 101570". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-08-01.

[Eggleton2008-6] 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.

[daSilva2015-7] Rodrigues da Silva, R.; et al. (March 2015). "On the Nature of Rapidly Rotating Single Evolved Stars". The Astrophysical Journal. 801 (1): 6. arXiv:1503.03447. Bibcode:2015ApJ...801...54R. doi:10.1088/0004-637X/801/1/54. 54.