Kepler-409b

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Kepler-409b
Discovery
Discovered by Kepler space telescope
Discovery date2014
Transit
Designations
KOI-1925, KIC 9955598 [1]
Orbital characteristics [2]
0.3192 AU
Eccentricity <0.69
68.9583216±0.0000039 d
Inclination 86.30±0.13
StarKepler-409
Physical characteristics
1.199 R🜨
Mass <6 ME
Mean density
<19 g/cm3
Temperature 438±7 K

    Kepler-409b is a super-Earth orbiting Kepler-409, a G-type main-sequence star. Its orbital period around the star is 69 days. Kepler-409b has a radius 1.199 times that of Earth and a mass 6 times that of Earth. Its discovery in 2014 was made through the use of the transit detection method. The transit method was performed by the Kepler space telescope. [1]

    Possible exomoon

    In 2020, a possible exomoon was discovered from transit timing variations. [3] Follow-up observations deemed it unlikely. [4]

    References

    1. 1 2 "The Extrasolar Planet Encyclopaedia — Kepler-409b". Extrasolar Planets Encyclopaedia . 1995. Retrieved 11 September 2023.
    2. ↑ Bonomo, A. S.; Dumusque, X.; Massa, A.; Mortier, A.; Bongiolatti, R.; Malavolta, L.; Sozzetti, A.; Buchhave, L. A.; Damasso, M.; Haywood, R. D.; Morbidelli, A.; Latham, D. W.; Molinari, E.; Pepe, F.; Poretti, E. (September 2023). "Cold Jupiters and improved masses in 38 Kepler and K2 small planet systems from 3661 HARPS-N radial velocities: No excess of cold Jupiters in small planet systems". Astronomy & Astrophysics. 677: A33. arXiv: 2304.05773 . Bibcode:2023A&A...677A..33B. doi: 10.1051/0004-6361/202346211 . ISSN   0004-6361.
    3. ↑ Fox, Chris; Wiegert, Paul (23 November 2020). "Exomoon Candidates from Transit Timing Variations: Eight Kepler systems with TTVs explainable by photometrically unseen exomoons". Monthly Notices of the Royal Astronomical Society. 501 (2): 2378–2393. arXiv: 2006.12997 . Bibcode:2021MNRAS.501.2378F. doi: 10.1093/mnras/staa3743 . S2CID   219980961.
    4. ↑ Kipping, David (8 August 2020). "An Independent Analysis of the Six Recently Claimed Exomoon Candidates". The Astrophysical Journal. 900 (2): L44. arXiv: 2008.03613 . Bibcode:2020ApJ...900L..44K. doi: 10.3847/2041-8213/abafa9 . S2CID   225253170.
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