HD 175541 b

HD 175541 b, also named Kavian, is a jovian planet located approximately 424 light-years away[3] in the constellation of Serpens, orbiting the star HD 175541. This planet was discovered in April 2007. Despite the distance of planet to star slightly more than Earth to the Sun, the period is less than 300 days that orbits in an eccentric orbit, because the parent star is 65% more massive than the Sun.[1]

HD 175541 b / Kavian
Discovery[1]
Discovered byJohnson et al.
Discovery siteLick Observatory
and Keck Observatory
Discovery dateApril 10, 2007
Doppler spectroscopy
Orbital characteristics[2]
0.975±0.087 AU
Eccentricity0.110±0.049
298.43±0.45 d
2450155±25 JD
129±28 º
Semi-amplitude14.68±0.71 m/s
StarHD 175541
Physical characteristics[2]
Mass≥0.598±0.029 MJ

    The planet HD 175541 b is called Kavian. The name was selected in the NameExoWorlds campaign by Iran, during the 100th anniversary of the IAU. Kaveh (name of the star HD 175541) carries a banner called Derafsh Kaviani in the Shahnameh.[4][5]

    The discovery of this planet and two others: HD 192699 b and HD 210702 b around intermediate-mass stars provide clues about the formation and history of migration of planets around the A-type stars.

    References
    1. Johnson, John Asher; et al. (2007). "Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants". The Astrophysical Journal. 665 (1): 785–793. arXiv:0704.2455. Bibcode:2007ApJ...665..785J. doi:10.1086/519677.
    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. S2CID 102486961.
    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.
    4. "Approved names". NameExoworlds. Retrieved 2020-01-02.
    5. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.


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