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HD 129445 is a G type star found in the Circinus constellation located approximately 220 light-years away from the Sun based on parallax.[1] It is invisible to the naked eye with an apparent visual magnitude of 8.80.[2] The star has been under the Magellan Planet Search Program observation due to its absolute visual magnitude and high metallicity. The Magellan program conducted 17 doppler velocity tests, which spans a full orbital period. The results led the program to detect a planet dubbed HD 129445 b whose readings was accurate to the Keplerian orbital model.[7][8][9]

The HD 129445 planetary system[7]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥1.6 ± 0.6 MJ 2.9 ± 0.2 1,840 ± 55 0.70 ± 0.10 — —
HD 129445
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Circinus
Right ascension 14h 46m 03.06494s[1]
Declination –68° 45′ 45.8766″[1]
Apparent magnitude (V) 8.80[2]
Characteristics
Spectral type G6V[3]
Apparent magnitude (B) 9.556[2]
Apparent magnitude (J) 7.531±0.023[2]
Apparent magnitude (H) 7.243±0.027[2]
Apparent magnitude (K) 7.167±0.026[2]
B−V color index 0.756±0.002[2]
Astrometry
Radial velocity (Rv)+8.38±0.24[1] km/s
Proper motion (μ) RA: –197.786[1] mas/yr
Dec.: –57.261[1] mas/yr
Parallax (π)14.7995 ± 0.0350 mas[1]
Distance220.4 ± 0.5 ly
(67.6 ± 0.2 pc)
Absolute magnitude (MV)4.73[2]
Details[4]
Mass1.06+0.03
−0.05 M☉
Radius1.18±0.01[1] R☉
Luminosity1.229+0.005
−0.004[1] L☉
Surface gravity (log g)4.39±0.08 cgs
Temperature5,605+21
−34[1] K
Metallicity [Fe/H]0.36±0.10 dex
Rotational velocity (v sin i)1.4[5] km/s
Age4.94+3.77
−2.04 Gyr
Other designations
CD–68°1403, HD 129445, HIP 72203, PPM 360965, LTT 5856, NLTT 38236[6]
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

See also



References


  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.
  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. S2CID 119257644.
  3. Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
  4. Aguilera-Gómez, Claudia; et al. (June 2018). "Lithium abundance patterns of late-F stars: an in-depth analysis of the lithium desert". Astronomy & Astrophysics. 614: 15. arXiv:1803.05922. Bibcode:2018A&A...614A..55A. doi:10.1051/0004-6361/201732209. S2CID 62799777. A55.
  5. Jenkins, J. S.; et al. (July 2011). "Chromospheric activities and kinematics for solar type dwarfs and subgiants: analysis of the activity distribution and the AVR". Astronomy & Astrophysics. 531: 15. arXiv:1103.0584. Bibcode:2011A&A...531A...8J. doi:10.1051/0004-6361/201016333. S2CID 55800969. A8.
  6. "HD 129445". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-03-22.
  7. Arriagada, Pamela; et al. (2010). "Five Long-period Extrasolar Planets in Eccentric orbits from the Magellan Planet Search Program". The Astrophysical Journal. 711 (2): 1229–35. arXiv:1001.4093. Bibcode:2010ApJ...711.1229A. doi:10.1088/0004-637X/711/2/1229. S2CID 118682009.
  8. "Estrella del Anfitrión: HD 129445". Planet Quest. Archived from the original on 2010-07-04. Retrieved 2010-02-12.
  9. "HD 129445". Exoplanets. Archived from the original on 2010-03-17. Retrieved 2010-02-12.


На других языках

- [en] HD 129445

[ru] HD 129445

HD 129445 — звезда, которая находится в созвездии Циркуль на расстоянии около 220 световых лет от нас. Вокруг звезды обращается, как минимум, одна планета.


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