astro.wikisort.org - Meteorite

Search / Calendar

HD 180902 b is an extrasolar planet orbiting the K-type star HD 180902 approximately 342 light years away[3] in the constellation Sagittarius.[1]

HD 180902 b
Discovery[1]
Discovered byJohnson et al.
Discovery siteKeck Observatory
Discovery date2010
Detection method
Doppler spectroscopy
Orbital characteristics[2]
Semi-major axis
1.40±0.11 AU
Eccentricity0.107±0.022
Orbital period (sidereal)
510.9±1.5 d
Time of perihelion
2455055±17 JD
Argument of perihelion
181±12 º
Semi-amplitude34.25±0.84 m/s
StarHD 180902
Physical characteristics[2]
Mean radius
1.221 RJ
Mass≥1.685±0.041 MJ

    Discovery


    HD 180902 b, along with other planets, was discovered in 2010 by scientists at the Keck Observatory. These planets were discovered via doppler spectroscopy, which is detecting exoplanets using the star's wobble.


    Properties


    Orbit

    HD 180902 b takes 510 days to orbit its parent star, which is longer than Earth's orbital period, which is 365 days. It orbits at a distance similar to Earth from the sun. HD 180902 orbits with mild eccentricity.


    Characteristics


    HD 180902 b has a minimum mass of 1.685 times the mass of Jupiter, but since its inclination is not known, the true mass of the planet cannot be detected. According to a theoretical search by the observatory, it may have a radius that is 22.1% larger than Jupiter.

    Size comparison
    Jupiter HD 180902 b

    See also



    References


    1. Johnson, John Asher; et al. (2010). "Retired a Stars and Their Companions. IV. Seven Jovian Exoplanets from Keck Observatory". Publications of the Astronomical Society of the Pacific. 122 (892): 701–711. arXiv:1003.3445. Bibcode:2010PASP..122..701J. doi:10.1086/653809.
    2. Luhn, Jacob K.; et al. (2019). "Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts". The Astronomical Journal. 157 (4). 149. arXiv:1811.03043. Bibcode:2019AJ....157..149L. doi:10.3847/1538-3881/aaf5d0.
    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.



    На других языках

    - [en] HD 180902 b

    [ru] HD 180902 b

    HD 180902 b -экзопланета, вращающаяся вокруг оранжевого карлика HD 180902 и находящаяся на расстоянии приблизительно 359 световых лет в созвездии Стрельца[2].


    Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.

    Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.

    2019-2025
    WikiSort.org - проект по пересортировке и дополнению контента Википедии