HD 89307

Last updated
HD 89307
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Leo
Right ascension 10h 18m 21.28771s [1]
Declination +12° 37′ 15.9909″ [1]
Apparent magnitude  (V)7.02 [2]
Characteristics
Spectral type G0V [3]
B−V color index 0.594±0.003 [2]
Astrometry
Radial velocity (Rv)+23.27±0.13 [1]  km/s
Proper motion (μ)RA: −272.659  mas/yr [1]
Dec.: −39.333  mas/yr [1]
Parallax (π)31.4134 ± 0.0226  mas [1]
Distance 103.83 ± 0.07  ly
(31.83 ± 0.02  pc)
Absolute magnitude  (MV)4.57 [4]
Details [4]
Mass 1.028±0.04  M☉
Radius 1.08+0.01
−0.02 [5]   R☉
Luminosity 1.354±0.003 [5]   L☉
Surface gravity (log g)4.414±0.10  cgs
Temperature 5,950±44  K
Metallicity [Fe/H]−0.15±0.02 [2]   dex
Rotation 23.7 d
Rotational velocity (v sin i)3.21±0.50 km/s
Age 5.3+2.7
−2.9 Gyr [2]
6.76 [4]   Gyr
Other designations
BD+13 2237, GC  14140, HD  1835, HIP  50473, SAO  99049, PPM  127289 [6]
Database references
SIMBAD data

HD 89307 is a star in the equatorial constellation of Leo. It is too faint to be viewed with the naked eye except under ideal conditions, having an apparent visual magnitude of 7.02. [2] The star is located at a distance of 104 light-years (32 parsecs ) from the Sun based on parallax, and is drifting further away with a radial velocity of +23 km/s. [1]

Contents

This is an ordinary G-type main-sequence star with a stellar classification of G0V. [3] It is chromospherically inactive and appears older than the Sun with a rotation period of 23.7 days. [4] The star has about the same mass [4] as the Sun and is 8% larger. It is radiating 1.35 [5] times the Sun's luminosity from its photosphere at an effective temperature of 5,950 K. [4]

Planetary system

In December 2004, using the radial velocity method, it was found to have a long-period giant planet in orbit around it. [4] The parameters of HD 89307 b were updated in 2012, [7] and in 2023 its inclination and true mass were determined via astrometry. [8]

The HD 89307 planetary system [8]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(years)		 Eccentricity Inclination Radius
b 2.02+0.27
−0.15  MJ 		3.331+0.052
−0.053		5.991+0.081
−0.078		0.174+0.041
−0.043		72+13
−15 or 108+15
−13 ° 		—

See also

Related Research Articles

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HD 117207 is a star in the southern constellation Centaurus. With an apparent visual magnitude of 7.24, it is too dim to be visible to the naked eye but can be seen with a small telescope. Based upon parallax measurements, it is located at a distance of 105.4 light-years from the Sun. The star is drifting closer with a radial velocity of −17.4 km/s. It has an absolute magnitude of 4.67.

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HD 196050 is a triple star system located in the southern constellation of Pavo. This system has an apparent magnitude of 7.50 and the absolute magnitude is 4.01. It is located at a distance of 165 light-years from the Sun based on parallax, and is drifting further away with a radial velocity of +61 km/s. It is also called by the Hipparcos designation HIP 101806.

HD 213240 is a possible binary star system in the constellation Grus. It has an apparent visual magnitude of 6.81, which lies below the limit of visibility for normal human sight. The system is located at a distance of 133.5 light years from the Sun based on parallax. The primary has an absolute magnitude of 3.77.

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HD 103197 is a star with a planetary companion in the southern constellation of Centaurus. It has an apparent visual magnitude of 9.40, which is too faint to be viewed with the naked eye. Based on parallax measurements, HD 103197 is located at a distance of 187 light years from the Sun. It is drifting closer with a radial velocity of −4.6 km/s.

HD 175167 is a star with an exoplanet companion in the southern constellation of Pavo. It is too faint to be visible with the naked eye at an apparent visual magnitude of 8.01. The system is located at a distance of 232 light-years from the Sun based on parallax measurements, and it is drifting further away with a radial velocity of 5 km/s. It shows a high proper motion, traversing the celestial sphere at an angular rate of 0.190 arcsec yr−1.

HD 220689 is a single star in the equatorial constellation of Aquarius. It is a challenge to view with the naked eye, having an apparent visual magnitude of +7.74, but is readily viewed with a pair of binoculars. The star is located at a distance of 153 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +12 km/s. A survey in 2015 has ruled out the existence of any additional stellar companions at projected distances from 26 to 305 astronomical units.

HD 106515 is a binary star in the constellation of Virgo.

HD 109271 is a star in the constellation of Virgo. With an apparent magnitude of 8.05, it cannot be seen with the naked eye. Parallax measurements made by Gaia put the star at a distance of 182 light-years away.

References

  1. 1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  2. 1 2 3 4 5 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. S2CID   119257644.
  3. 1 2 Harlan, E. A. (September 1969). "MK classifications for F- and G-type stars. I". Astronomical Journal. 74: 916–919. Bibcode:1969AJ.....74..916H. doi:10.1086/110881.
  4. 1 2 3 4 5 6 7 Fischer, Debra; et al. (2009). "Five planets and an independent confirmation of HD 196885 Ab from Lick Observatory". The Astrophysical Journal. 703 (2): 1545–1556. arXiv: 0908.1596 . Bibcode:2009ApJ...703.1545F. doi:10.1088/0004-637X/703/2/1545. S2CID   15524804.
  5. 1 2 3 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.
  6. ↑ "9 Cet". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2021-03-27.
  7. ↑ Boisse, Isabelle; Pepe, Francesco; Perrier, Christian; Queloz, Didier; Bonfils, Xavier; Bouchy, François; Santos, Nuno C.; Arnold, Luc; Beuzit, Jean-Luc; Dìaz, Rodrigo F.; Delfosse, Xavier; Eggenberger, Anne; Ehrenreich, David; Forveille, Thierry; Hébrard, Guillaume; Lagrange, Anne-Marie; Lovis, Christophe; Mayor, Michel; Moutou, Claire; Naef, Dominique; Santerne, Alexandre; Ségransan, Damien; Sivan, Jean-Pierre; Udry, Stéphane (2012), "The SOPHIE search for northern extrasolar planets V. Follow-up of ELODIE candidates: Jupiter-analogs around Sun-like stars", Astronomy and Astrophysics, 545: A55, arXiv: 1205.5835 , Bibcode:2012A&A...545A..55B, doi:10.1051/0004-6361/201118419, S2CID   119109836
  8. 1 2 Xiao, Guang-Yao; Liu, Yu-Juan; et al. (March 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics . arXiv: 2303.12409 .
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