Kepler-93b
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| Discovery | |
|---|---|
| Discovered by | Geoffrey W. Marcy et al. [1] |
| Discovery date | February 2014 (announced)[1] |
| Transit method | |
| Designations | |
| KIC 3544595 b, KOI-69.01, BD+38 3583b, TYC 3134-218-1 b[2] | |
| Orbital characteristics | |
| 0.053±0.002[3] AU | |
| Eccentricity | 0 |
| 4.72673978±0.0000009 [4] d | |
| Inclination | 89.183±0.044[3] |
| Star | Kepler-93 |
| Physical characteristics | |
Mean radius | 1.478±0.019[4] R🜨 |
| Mass | 4.02±0.68[3] ME |
Mean density | 6.88±1.18 g/cm3[3] |
| Temperature | 1039±26 K[4] (equilibrium) |
Kepler-93b (KOI-69b) is a Super-Earth exoplanet located approximately 314 light-years (96.18 parsecs)[2] away in the constellation of Lyra[5][6], orbiting the G5V-type star[5] Kepler-93. Its discovery was announced in 2014 by astronomer Geoffrey Marcy and his team[1].
Physical properties[edit]
The planet has a radius of around 1.478 R🜨 (9,416 km), with an uncertainty of just 0.019 R🜨 (121 km)[4], making it the most precisely measured exoplanet ever in terms of radius as of July 2014[7]. The planet is substantially denser than Earth at 6.88±1.18 g/cm3[3] thanks to its high mass of roughly 4 ME, consistent with a rocky composition of iron and magnesium silicate[3].
Based on these findings, the interior of the planet is likely similar to that of Earth and Venus, with an iron core making up around 26% of its total mass (albeit with a large uncertainty of ±20%)[8], compared to the 32.5±0.1% of Earth and 31±1% of Venus[8].
References[edit]
- ^ a b c Marcy, Geoffrey W.; et al. (February 2014). "MASSES, RADII, AND ORBITS OF SMALL KEPLER PLANETS: THE TRANSITION FROM GASEOUS TO ROCKY PLANETS". The Astrophysical Journal. 210 (2). arXiv:1401.4195. Bibcode:2014ApJS..210...20M. doi:10.1088/0067-0049/210/2/20. S2CID 263794691. 124.
- ^ a b "The Extrasolar Planet Encyclopaedia — Kepler-93b". Extrasolar Planets Encyclopaedia. Retrieved 2024-05-04.
- ^ a b c d e f Dressing, Courtney D.; et al. (February 2015). "The Mass of Kepler-93b and The Composition of Terrestrial Planets". The Astrophysical Journal. 800 (2). arXiv:1412.8687. Bibcode:2015ApJ...800..135D. doi:10.1088/0004-637X/800/2/135. S2CID 53471038. 135.
- ^ a b c d Ballard, Sarah; et al. (July 2014). "Kepler-93b: A Terrestrial World Measured to within 120 km, and a Test Case for a New Spitzer Observing Mode". The Astrophysical Journal. 790 (1). arXiv:1405.3659. Bibcode:2014ApJ...790...12B. doi:10.1088/0004-637X/790/1/12. S2CID 12644226. 12.
- ^ a b "BD+38 3853". SIMBAD. Retrieved 2024-05-08.
- ^ "SKY-MAP.ORG - Interactive Sky Map". Sky-Map.org. Retrieved 2024-05-08.
- ^ "Gauging an Alien World's Size". NASA. 2014-07-22. Retrieved 2024-05-07.
- ^ a b Li, Zeng; et al. (March 2016). "Mass-Radius Relation for Rocky Planets based on PREM". The Astrophysical Journal. 819 (2). arXiv:1512.08827. Bibcode:2016ApJ...819..127Z. doi:10.3847/0004-637X/819/2/127. S2CID 119111854. 127.
Sources[edit]
- https://www.nasa.gov/jpl/spitzer/kepler/precise-measurement-alien-world-20140723
- https://exoplanets.nasa.gov/exoplanet-catalog/1309/kepler-93-b/
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