HD 60803

HD 60803
Observation data; Epoch J2000 Equinox J2000
Constellation	Canis Minor
Right ascension	07h 36m 34.70576s[1]
Declination	05° 51′ 43.8228″[1]
Apparent magnitude (V)	5.904[2]
Characteristics
Spectral type	G0V + G1V[3]
U−B color index	1.351[2]
Astrometry
Radial velocity (Rv)	+4.60±0.06[4] km/s
Proper motion (μ)	RA: −109.760[1] mas/yr ; Dec.: +27.392[1] mas/yr
Parallax (π)	24.1025 ± 0.0542[1] mas
Distance	135.3 ± 0.3 ly ; (41.49 ± 0.09 pc)
Absolute magnitude (MV)	2.93[5]
Orbit[6]
Period (P)	26.1889±0.0006 d
Semi-major axis (a)	≥16.61±0.04 Gm[3]
Eccentricity (e)	0.2187±0.0017
Periastron epoch (T)	49644.88±0.03 MJD
Argument of periastron (ω); (secondary)	113.6±0.5°
Semi-amplitude (K1); (primary)	47.26±0.10 km/s
Semi-amplitude (K2); (secondary)	48.16±0.12 km/s
Details
A
Mass	1.31[7] M☉
Radius	2.30+0.06; −0.29[1] R☉
Luminosity	6.416±0.020[1] L☉
Surface gravity (log g)	3.87[2] cgs
Temperature	6,059+419; −84 K
Metallicity [Fe/H]	−0.04±0.02[2] dex
Rotational velocity (v sin i)	2.6±0.6[3] km/s
Age	2.8+0.9; −0.1[5] Gyr
B
Mass	1.28[7] M☉
Rotational velocity (v sin i)	0.9±1.0[3] km/s
Other designations
	BD+06°1729, HD 60803, HIP 37031, HR 2918, SAO 115693[8]
Database references
SIMBAD	data

HD 60803 is a binary star system in the equatorial constellation of Canis Minor, located less than a degree to the northwest of the prominent star Procyon.[3] It has a yellow hue and is visible to the naked eye as a dim point of light with a combined apparent visual magnitude of 5.904.[2] The distance to this system is 135 light years as determined using parallax measurements,[1] and is drifting further away with a radial velocity of +4.6 km/s.[4]

The binary nature of this star system was first noted by O. C. Wilson and A. Skumanich in 1964.[3] It is a double-lined[7] spectroscopic binary with an orbital period of 26.2 days and an eccentricity of 0.22.[6] Both components are similar, G-type main-sequence stars; the primary has a stellar classification of G0V while the secondary has a class of G1V.[3] The masses are similar to each other, and are 28–31% greater than the mass of the Sun.[7] They have low rotation rates which may be quasi-synchronized with their orbital period.[3]

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.
Netopil, Martin (August 2017), "Metallicity calibrations for dwarf stars and giants in the Geneva photometric system", Monthly Notices of the Royal Astronomical Society, 469 (3): 3042–3055, arXiv:1705.00883, Bibcode:2017MNRAS.469.3042N, doi:10.1093/mnras/stx1077.
Griffin, R. F. (August 1997), "Spectroscopic binary orbits from photoelectric radial velocities. Paper 135: HR 2918", The Observatory, 117: 208–213, Bibcode:1997Obs...117..208G.
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.
Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.
Kozłowski, S. K.; et al. (July 2016), "Spectroscopic Survey of Eclipsing Binaries with a Low-cost Echelle Spectrograph: Scientific Commissioning", Publications of the Astronomical Society of the Pacific, 128 (965): 074201, arXiv:1602.01238, Bibcode:2016PASP..128g4201K, doi:10.1088/1538-3873/128/965/074201.
Tokovinin, Andrei (2014), "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs", The Astronomical Journal, 147 (4): 87, arXiv:1401.6827, Bibcode:2014AJ....147...87T, doi:10.1088/0004-6256/147/4/87.
"HD 60803". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-13.

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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.

[Netopil2017-2] Netopil, Martin (August 2017), "Metallicity calibrations for dwarf stars and giants in the Geneva photometric system", Monthly Notices of the Royal Astronomical Society, 469 (3): 3042–3055, arXiv:1705.00883, Bibcode:2017MNRAS.469.3042N, doi:10.1093/mnras/stx1077.

[Griffin1997-3] Griffin, R. F. (August 1997), "Spectroscopic binary orbits from photoelectric radial velocities. Paper 135: HR 2918", The Observatory, 117: 208–213, Bibcode:1997Obs...117..208G.

[Anderson2012-4] 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.

[Holmberg2009-5] Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.

[Kozłowski2016-6] Kozłowski, S. K.; et al. (July 2016), "Spectroscopic Survey of Eclipsing Binaries with a Low-cost Echelle Spectrograph: Scientific Commissioning", Publications of the Astronomical Society of the Pacific, 128 (965): 074201, arXiv:1602.01238, Bibcode:2016PASP..128g4201K, doi:10.1088/1538-3873/128/965/074201.

[tokovinin2014-7] Tokovinin, Andrei (2014), "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs", The Astronomical Journal, 147 (4): 87, arXiv:1401.6827, Bibcode:2014AJ....147...87T, doi:10.1088/0004-6256/147/4/87.

[SIMBAD-8] "HD 60803". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-13.