HD 129445 b

HD 129445 b
Discovery
Discovered by	Arriagada et al.
Discovery site	Las Campanas Observatory
Discovery date	January 26, 2010
Detection method	Doppler spectroscopy
Orbital characteristics
Semi-major axis	2.984+0.039; −0.054 AU
Eccentricity	0.572+0.087; −0.086
Orbital period (sidereal)	1802+34; −47 d; 4.933+0.093; −0.13 yr
Average orbital speed	17
Inclination	52°+24°; −19° or 128°+19°; −24°
Longitude of ascending node	105°+47°; −74°
Time of periastron	2456705+57; −77
Argument of periastron	163.8°+8.8°; −8.9°
Semi-amplitude	38 ± 6
Star	HD 129445
Physical characteristics
Mass	2.51+1.1; −0.54 MJ

HD 129445 b is an eccentric Jupiter gas giant exoplanet orbiting the star HD 129445 which was discovered by the Magellan Planet Search Program in 2010.^[1] Its minimum mass is 1.6 times Jupiter's, and it takes 5 years to complete one orbit around HD 129445, a G-type star approximately 219 light years away.^[3]^[4] In 2023, the inclination and true mass of HD 129445 b were determined via astrometry.^[2]

References

^ ^a ^b 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.
^ ^a ^b ^c Xiao, Guang-Yao; Liu, Yu-Juan; et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics. 23 (5): 055022. arXiv:2303.12409. Bibcode:2023RAA....23e5022X. doi:10.1088/1674-4527/accb7e.
^ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2020-01-10.
^ "HD 129445". Universe Guide. 25 January 2015. Retrieved 2020-01-10.

Zdroj:https://en.wikipedia.org?pojem=HD_129445_b
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[Arriagada2010-1] 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.

[Xiao2023-2] Xiao, Guang-Yao; Liu, Yu-Juan; et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics. 23 (5): 055022. arXiv:2303.12409. Bibcode:2023RAA....23e5022X. doi:10.1088/1674-4527/accb7e.

[3] "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2020-01-10.

[4] "HD 129445". Universe Guide. 25 January 2015. Retrieved 2020-01-10.

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Discovery^[1]
Discovered by	Arriagada et al.
Discovery site	Las Campanas Observatory
Discovery date	January 26, 2010
Detection method	Doppler spectroscopy
Orbital characteristics^[2]
Semi-major axis	2.984+0.039 −0.054 AU
Eccentricity	0.572+0.087 −0.086
Orbital period (sidereal)	1802+34 −47 d 4.933+0.093 −0.13 yr
Average orbital speed	17
Inclination	52°+24° −19° or 128°+19° −24°
Longitude of ascending node	105°+47° −74°
Time of periastron	2456705+57 −77
Argument of periastron	163.8°+8.8° −8.9°
Semi-amplitude	38 ± 6
Star	HD 129445
Physical characteristics^[2]
Mass	2.51+1.1 −0.54 M_J