HD 81040 b

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]
  1. ^ a b c Cite error: The named reference IOW20220131 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Sozzetti2006 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference Li2021 was invoked but never defined (see the help page).
  4. ^ a b c d e f g Cite error: The named reference Winn2022 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference GaiaDR3Exoplanets was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Feng2022 was invoked but never defined (see the help page).