Wikipedia

KOI 5715.01

KOI-5715.01 is an exoplanet candidate that orbits the K-type dwarf star KOI-5715, located approximately 2,964 light-years from Earth in the constellation of Cygnus. It was identified in 2015 through an analysis of light curve data obtained by the Kepler space telescope. While the exoplanet is yet to be confirmed, preliminary data suggests that it is one of the more promising superhabitable planet candidates.

KOI-5715.01
Orbital characteristics[1]
ApastronUnknown
PeriastronUnknown
0.6066 AU
EccentricityUnknown
189.961729±0.008865 d
Inclination89.95°
StarKOI-5715
Physical characteristics[1]
1.93+0.46
−0.13 R🜨
TemperatureTeq: 260 K (−13 °C; 8 °F)

Detection and status

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In April 2015, KOI-5715.01 was included in a published catalog of candidate planets identified by the Kepler space telescope but was initially classified as a false positive.[2][3] Following this, a 2016 study of transit-timing events from over 2,500 Kepler objects of interest (KOIs) re-identified KOI-5715.01 as a potential exoplanet.[4] In September 2018, the NASA Exoplanet Archive re-evaluated the dispositions of hundreds of KOIs, employing a more varied vetting approach aimed at achieving the most accurate disposition for each KOI.[5] Subsequently, KOI-5715.01 was reclassified as a candidate planet.[6]

Host star

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The planet orbits the faint orange dwarf star[a] KOI-5715, which has a spectral type of K3V.[8] It is located approximately 2,964 light-years from Earth in the constellation of Cygnus.[9] The effective temperature of the star is roughly 5123 K,[1] relatively cooler than the Sun's temperature of 5780 K.[10] KOI-5715 is also smaller than the Sun, possessing 74% of its mass and 86% of its radius.[1]

Habitability

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In 2020, Dirk Schulze-Makuch and colleagues recognized KOI-5715.01 as one of the top contenders for planets they deemed "superhabitable," defined as a planet that offers more favorable conditions for life than what is found on Earth.[8] It meets most of the criteria for superhabitable planets due to the characteristics of its host star and the planet's estimated age (~5.5 Ga) and surface temperature (~11.6 °C).[8] Although its surface temperature is slightly colder than the Earth's average of 15 °C,[11] it may still have superhabitable conditions if it is experiencing a comparatively stronger greenhouse effect.[8]

See also

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Notes

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  1. ^ K-type main sequence stars are sometimes called orange dwarfs.[7]

References

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  1. ^ a b c d "KOI-5715 Overview". Nasa Exoplanet Archive. Retrieved 27 December 2023.
  2. ^ Mullally, F.; Coughlin, Jeffrey L.; Thompson, Susan E.; Rowe, Jason; Burke, Christopher (April 2015). "Planetary Candidates Observed by Kepler. VI. Planet Sample from Q1--Q16 (47 Months)". The Astrophysical Journal Supplement Series. 217 (2): 31. arXiv:1502.02038. Bibcode:2015ApJS..217...31M. doi:10.1088/0067-0049/217/2/31. S2CID 38448081. Retrieved 14 January 2024.
  3. ^ "Q1-Q16 KOI Table". Nasa Exoplanet Archive. 18 December 2014. Retrieved 13 January 2024.
  4. ^ Holczer, Tomer; Mazeh, Tsevi; Nachmani, Gil; Jontof-Hutter, Daniel; Ford, Eric B.; Fabrycky, Daniel; Ragozzine, Darin; Kane, Mackenzie; Steffen, Jason H. (July 2016). "Transit Timing Observations from Kepler. IX. Catalog of the Full Long-cadence Data Set". The Astrophysical Journal Supplement Series. 225 (1): 9. arXiv:1606.01744. Bibcode:2016ApJS..225....9H. doi:10.3847/0067-0049/225/1/9.
  5. ^ "Purpose of Kepler Objects of Interest (KOI) Activity Tables. Q1-Q17 DR 25 KOI Supplemental". NASA Exoplanet Archive. Retrieved 14 January 2024.
  6. ^ "Q1-Q17 DR 25 Supplemental Table". NASA Exoplanet Archive. 27 September 2018. Retrieved 14 January 2024.
  7. ^ Howell, Elizabeth (21 January 2020). "'Orange dwarfs' may be the best stars to study in search for life". Space.com.
  8. ^ a b c d Schulze-Makuch, Dirk; Heller, René; Guinan, Edward (December 2020). "In Search for a Planet Better than Earth: Top Contenders for a Superhabitable World". Astrobiology. 20 (12): 1393–1404. Bibcode:2020AsBio..20.1394S. doi:10.1089/ast.2019.2161. PMC 7757576. PMID 32955925.
  9. ^ Carter, Jamie (7 October 2020). "Stop Looking For An 'Earth 2.0,' Say Scientists As They Detect An Even Better 'Superhabitable' World". Forbes.
  10. ^ Williams, D. R. (1 July 2012). "Sun Fact Sheet". NASA Goddard Space Flight Center.
  11. ^ Stein, Vicky; Sharp, Tim (20 September 2023). "What is the average temperature of Earth?". Space.com.
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