KOI-4878.01

KOI-4878.01
Artist's impression of KOI-4878.01
Discovery
Discovery siteKepler space telescope
Discovery date2015
Transit
Orbital characteristics
Semi-major axis
1.125 AU (168,300,000 km)
449.015±0.021 d
StarKOI-4878
Physical characteristics
Mean radius
1.05 R🜨
Temperature−16.5 °C (256.6 K; 2.3 °F)

    KOI-4878.01 is an exoplanet candidate that orbits the F-type main-sequence star KOI-4878. It is located 1075 light years (329 parsecs) distant.[1][2][3] The features of the planet are very similar to that of Earth, and if it is confirmed, it would be one of the most Earth-like planets found.[4] The orbital period of the exoplanet is around 449 Earth days. It is very likely located within the habitable zone of its parent star.[5][6]

    Host star

    Its host star is a F-type main-sequence star that is slightly less massive than the Sun, although it is about 5% larger and has a temperature of about 6031 K. The star is a V magnitude 12.4 star in the constellation Draco. Despite the unknown age of the star, its low metallicity and fairly high space velocity suggest that KOI-4878 is older than the Sun.[7][8]

    Exoplanet detection

    An analysis of the Kepler space telescope's data from its first to the twelve quarter revealed three possible transit events equally spaced in time. A post-analysis in the Sixteen quarter showed that the events happened within a period of 449 days, they had a duration of 12 and half hours and a transit depth of 94 ppm.[9]

    Characteristics

    Mass

    KOI-4878.01's mass is somewhere between 0.4 - 3.0 Earth masses; likely about 0.99 Earth masses.[10][11]

    Radius

    The exoplanet has a slightly larger radius than Earth: 1.05 Earth radii.[12]

    Temperature

    It has an equilibrium temperature of 256 K (-16.5 °C; 2.3 °F), an average surface temperature of about 2.4 degrees C (4.3 degrees F) cooler than Earth, but it may have more greenhouse gases than Earth to trap heat. [13]

    Properties of KOI-4878.01[14]
    Property Based on KIC data Based on new data
    Period (days) 449.015±0.021 449.015±0.021
    Semimajor Axis (AU) 1.137 +0.053/-0.040 1.125
    Planet Radius (Earth=1) 1.04 +0.38/-0.14 1.05
    Seff (Earth=1) 1.05 0.92

    Habitability

    The estimated features of the planet are similar to an Earth analog.[15] It completes an orbit around its host star every 449 Earth days. Based on this, KOI-4878.01 should be in the habitable zone of the star.[16][17]

    See also

    References

    1. ↑ Rowe, Jason F. (2015). "Planetary candidates observed by kepler v: planet sample from q1-q12 (36 months)". The Astrophysical Journal Supplement Series. 217 (1): 16. arXiv:1501.07286. Bibcode:2015ApJS..217...16R. doi:10.1088/0067-0049/217/1/16. S2CID 119204743.
    2. ↑ "KOI-4878.01". NASA Exoplanet Archive. Retrieved 2020-09-30.
    3. ↑ "KOI-4878.01". Simbad. Retrieved 2020-10-04.
    4. ↑ "Open Exoplanet Catalogue - KOI-4878 b". www.openexoplanetcatalogue.com. Retrieved 2020-10-04.
    5. ↑ "Life away from Earth" (PDF). El Faro del Saber - UNED Long-distance Learning University.
    6. ↑ "KOI-4878.01: Kepler's Most Earth-like Planet Candidate?". Drew Ex Machina. 2019-09-05. Retrieved 2020-09-30.
    7. ↑ "KOI-4878". exoplanetarchive.ipac.caltech.edu. Retrieved 2020-09-30.
    8. ↑ Institute, CSIC. "Exoplanets in the Milky Way" (PDF).
    9. ↑ "KOI-4878.01: Kepler's Most Earth-like Planet Candidate?". Drew Ex Machina. 2019-09-05. Retrieved 2020-10-01.
    10. ↑ How the Universe Works: An Illustrated Guide to the Cosmos. Book Sales. 2017. ISBN 9780785835417.
    11. ↑ Institute, CSIC. "Exoplanets in the Milky Way" (PDF).
    12. ↑ "La NASA ha encontrado siete exoplanetas similares a la Tierra en los que buscar vida". El HuffPost (in Spanish). 2017-02-22. Retrieved 2020-10-01.
    13. ↑ "KOI-4878.01". exoplanetarchive.ipac.caltech.edu. Retrieved 2020-09-30.
    14. ↑ "KOI-4878.01: Kepler's Most Earth-like Planet Candidate?". Drew Ex Machina. 2019-09-05. Retrieved 2020-10-01.
    15. ↑ Atargatis (2020-11-10). "Found more than 20 exoplanets that could host life". Atargatis.news (in Italian). Retrieved 2020-11-12.
    16. ↑ Mendez, Abel. Potentially habitable worlds.
    17. ↑ "Planetas habitables en los que nunca habitaremos". El Independiente (in Spanish). 2016-10-07. Retrieved 2020-10-04.
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