XO-4b

XO-4b is an extrasolar planet approximately 956 light years away in the constellation of Lynx. This planet was found by the transit method by McCullough in May 2008. The planet has mass 1.72 MJ and radius 1.34 RJ. This planet orbits very close to the F-type parent star, as it is typical for transiting planets, classing this planet as Hot Jupiter.

XO-4b
Size comparison of XO-4b with Jupiter.
Discovery
Discovered byMcCullough et al.
Discovery siteMaui, Hawaii
Discovery dateMay 19, 2008
Transit
Orbital characteristics
0.0555 ± 0.00011 AU (8,303,000 ± 16,000 km)
Eccentricity0.0024
4.12502 ± 2e-5 d
0.011293 y
Inclination88.7 ± 1.1
StarXO-4
Physical characteristics
Mean radius
1.34 ± 0.048 RJ
Mass1.72 ± 0.2 MJ
Mean density
948 kg/m3 (1,598 lb/cu yd)
24.8 m/s2 (81 ft/s2)
Temperature~1333

    It takes only 4.125 days (or 99 hours) to orbit at a distance of 8.3 gigameters (0.0555 AU) away from the star.[1]

    The planet XO-4b is named Hämarik. The name was selected in the NameExoWorlds campaign by Estonia, during the 100th anniversary of the IAU. Hämarik is Estonian for dusk, and was named for a character in a folk tale written by Friedrich Robert Faehlmann.[2][3][4]

    See also

    References
    1. McCullough, P. R.; et al. (2008). "XO-4b: An Extrasolar Planet Transiting an F5V Star". 0805: arXiv:0805.2921. arXiv:0805.2921. Bibcode:2008arXiv0805.2921M. Cite journal requires |journal= (help)
    2. "Approved names". NameExoworlds. Retrieved 2020-01-02.
    3. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
    4. "Estonia has been assigned its own star and planet". Estonian World. Retrieved 2020-01-20.

    Media related to XO-4b at Wikimedia Commons

    • "XO-4". Exoplanets. Retrieved 2008-08-06.


    This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.