HD 92589

HD 92589
Observation data; Epoch J2000 Equinox J2000
Constellation	Antlia
Right ascension	10h 40m 51.5365s[1]
Declination	−35° 44′ 30.2323″[1]
Apparent magnitude (V)	6.36[2]
Characteristics
Spectral type	G8/K0 III + F/G[3]
U−B color index	+0.02[4]
B−V color index	+0.92[4]
Astrometry
Radial velocity (Rv)	7.25±0.58[1] km/s
Proper motion (μ)	RA: −22.867[1] mas/yr ; Dec.: +9.682[1] mas/yr
Parallax (π)	2.0538 ± 0.2652 mas[1]
Distance	approx. 1,600 ly ; (approx. 490 pc)
Absolute magnitude (MV)	−0.78[2]
Details
A
Mass	3.81[5] M☉
Radius	34.20+1.42; −0.68[1] R☉
Luminosity	682±99[1] L☉
Surface gravity (log g)	1.99[5] cgs
Temperature	5,045+53; −99[1] K
Metallicity [Fe/H]	−0.29[5] dex
Rotational velocity (v sin i)	1.6±1.2[6] km/s
Age	240[7] Myr
Position (relative to HD 92589A)[8]
Component	HD 92589B
Epoch of observation	J2000.0
Angular distance	0.6″
Position angle	48°
Observed separation; (projected)	294 AU
Other designations
	76 G. Antliae, CD−35° 6646, CPD−35° 4320, FK5 2586, HD 92589, HIP 52273, HR 4183, SAO 201631, WDS J10409-3545
Database references
SIMBAD	data

HD 92589 (HR 4183) is a double star in the constellation Antlia. The system has a combined apparent magnitude of 6.37,[2] which makes it barely visible to the naked eye under ideal conditions and is located about 1,600 light years[1] away based on its parallax shift. It has a heliocentric radial velocity of 7.25 km/s,[1] which indicates that it is drifting away from the Solar System.

The primary has a stellar classification of G8/K0 III[3] which indicates that it is an evolved star with a blended spectrum of a G8 and K0 giant star while the companion is probably a F-type or G-type star.[3] At present the visible component has 3.81 times the mass of the Sun[5] but has expanded to 34.2[1] times its girth. It shines with a luminosity 682[1] times greater than the Sun from its enlarged photosphere at an effective temperature of 5,045 K,[1] which gives the yellow hue of a G-type star. HD 92589A is metal-deficient, with an iron abundance only 51%[5] that of the Sun and spins leisurely with a projected rotational velocity of 1.6 km/s,[6] common for giant stars.

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. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737.
Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0.
Deutschman, W. A.; Davis, R. J.; Schild, R. E. (February 1976). "The galactic distribution of interstellar absorption as determined from the Celescope catalog of ultraviolet stellar observations and a new catalog of UBV, H-beta photoelectric observations". The Astrophysical Journal Supplement Series. 30: 97. Bibcode:1976ApJS...30...97D. doi:10.1086/190359. ISSN 0067-0049.
Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. doi:10.1051/0004-6361/201935765. ISSN 0004-6361.
De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars: V. Southern stars⋆⋆⋆". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. ISSN 0004-6361.
"Digital Demo Room - Stellar Structure and Evolution Simulator". rainman.astro.illinois.edu.
Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. ISSN 0004-6256.

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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. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737.

[Houk1982-3] Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0.

[Deutscman1976-4] Deutschman, W. A.; Davis, R. J.; Schild, R. E. (February 1976). "The galactic distribution of interstellar absorption as determined from the Celescope catalog of ultraviolet stellar observations and a new catalog of UBV, H-beta photoelectric observations". The Astrophysical Journal Supplement Series. 30: 97. Bibcode:1976ApJS...30...97D. doi:10.1086/190359. ISSN 0067-0049.

[Anders2019-5] Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. doi:10.1051/0004-6361/201935765. ISSN 0004-6361.

[DeMederios2014-6] De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars: V. Southern stars⋆⋆⋆". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. ISSN 0004-6361.

[DDR-7] "Digital Demo Room - Stellar Structure and Evolution Simulator". rainman.astro.illinois.edu.

[Mason2001-8] Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. ISSN 0004-6256.