HD 81040 b
Radial velocity curve of HD 81040 b
Radial velocity curve of HD 81040 b[1]
Discovery
Discovered bySozzetti et al.[2]
Discovery siteObservatoire de Haute-Provence
in France
Discovery dateNovember 24, 2005
Doppler Spectroscopy
Orbital characteristics
1.946 ± 0.014 AU (291,100,000 ± 2,100,000 km)[3]
Eccentricity0.525+0.024
−0.026[3]
1,004.7 ± 3.0 days (2.7507 ± 0.0082 years)[4]
Inclination111.4°+4.4°
−4.7°[4]
19.2°+5.0°
−4.8°[4]
245511.1+10
−8.7[3]
73.1°±4.3°[4]
Semi-amplitude168 ± 9[2]
StarHD 81040
Physical characteristics
Mass7.53±0.032 MJ[4]

    HD 81040 b is a massive gas giant exoplanet that orbits the star HD 81040, discovered in 2005 by radial velocity.[2] Its orbital period is just over 1000 days. It has a semimajor axis of about 1.95 AU, and its orbit is quite eccentric, at a little over 0.5.[3][4]

    Astrometry of HD 81040 using Gaia, published in several papers, has determined an orbital inclination of about 111°. This, combined with the minimum mass, gives a true mass of 7.53 MJ.[3][1][5][6][4] Since the inclination is high, there is a small chance that the planet transits.[3]

    Astrometric orbit of HD 81040 b[1]

    See also

    References

    1. 1 2 3 "Image of the Week: Astrometric Orbit of the Exoplanet-Host Star HD81040". cosmos.esa.int. ESA/Gaia/DPAC/CU4-CU3. 31 January 2022. Retrieved 14 September 2022.
    2. 1 2 3 Sozzetti, A.; et al. (2006). "A massive planet to the young disc star HD 81040". Astronomy and Astrophysics. 449 (1): 417–424. arXiv:astro-ph/0511679. Bibcode:2006A&A...449..417S. doi:10.1051/0004-6361:20054303. S2CID 7647622.
    3. 1 2 3 4 5 6 Li, Yiting; Brandt, Timothy D.; Brandt, G. Mirek; Dupuy, Trent J.; Michalik, Daniel; Jensen-Clem, Rebecca; Zeng, Yunlin; Faherty, Jacqueline; Mitra, Elena L. (2021). "Precise Masses and Orbits for Nine Radial-velocity Exoplanets". The Astronomical Journal. 162 (6): 266. arXiv:2109.10422. Bibcode:2021AJ....162..266L. doi:10.3847/1538-3881/ac27ab. S2CID 237592581.
    4. 1 2 3 4 5 6 7 Winn, Joshua N. (September 2022). "Joint Constraints on Exoplanetary Orbits from Gaia DR3 and Doppler Data". The Astronomical Journal. 164 (5): 196. arXiv:2209.05516. Bibcode:2022AJ....164..196W. doi:10.3847/1538-3881/ac9126. S2CID 252211643.
    5. ↑ Gaia Collaboration; et al. (2023). "Gaia Data Release 3". Astronomy & Astrophysics. 674: A34. arXiv:2206.05595. doi:10.1051/0004-6361/202243782. S2CID 249626026.
    6. ↑ Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21): 21. arXiv:2208.12720. Bibcode:2022ApJS..262...21F. doi:10.3847/1538-4365/ac7e57. S2CID 251864022.
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