Astronomy:Kepler-78
 Artist's impression of the planet Kepler-78b around Kepler-78 | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 34m 58.01374s[1] |
| Declination | +44° 26′ 53.9602″[1] |
| Apparent magnitude (V) | 11.72[2] |
| Characteristics | |
| Spectral type | late G[3] |
| Astrometry | |
| Proper motion (μ) | RA: 38.195[1] mas/yr Dec.: −16.309[1] mas/yr |
| Parallax (π) | 8.0085 ± 0.0104[1] mas |
| Distance | 407.3 ± 0.5 ly (124.9 ± 0.2 pc) |
| Details[4] | |
| Mass | 0.779+0.032 −0.046 M☉ |
| Radius | 0.7475+0.0077 −0.0078 R☉ |
| Temperature | 5058±50 K |
| Metallicity [Fe/H] | −0.18±0.08 dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Kepler-78 (formerly known as KIC 8435766) is a 12th magnitude star 407 light-years (125 parsecs) away in the constellation Cygnus.[2] Initially classified as an eclipsing binary with orbital period 0.710015 days,[5] it was later re-classified as a single star with significant interaction between star magnetosphere and close-in planet.[6] The radius of the star is of about 74% of the Sun, and the effective temperature is about 5100 K.
Planetary system
The Kepler-78 planetary system is composed of one known planet called Kepler-78b, a planet slightly bigger than Earth with an extremely close orbit to the parent star. The orbital period of this planet is about 8.5 hours because of its proximity to its star. While it has a similar density to the Earth (at 5.57 g/cm3), its surface temperature is about 1300 to 1500 K.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.68±0.27 M⊕ | 0.00901+0.00012 −0.00019 |
0.35500745±0.00000008 | 0 | 75.2+2.6 −2.1° |
1.201±0.028 R⊕ |
References
- ↑ 1.0 1.1 1.2 1.3 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 "Kepler-78". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-78.
- ↑ Sanchis-Ojeda, Roberto et al. (2013). "Transits and Occultations of an Earth-sized Planet in an 8.5 hr Orbit". The Astrophysical Journal 774 (1): 54. doi:10.1088/0004-637X/774/1/54. Bibcode: 2013ApJ...774...54S.
- ↑ 4.0 4.1 Bonomo, A. S. et al. (April 2023). "Cold Jupiters and improved masses in 38 Kepler and K2 small-planet systems from 3661 high-precision HARPS-N radial velocities. No excess of cold Jupiters in small-planet systems". Astronomy & Astrophysics. doi:10.1051/0004-6361/202346211.
- ↑ KEPLER ECLIPSING BINARY STARS. II. 2165 ECLIPSING BINARIES IN THE SECOND DATA RELEASE[|permanent dead link|dead link}}]
- ↑ Strugarek, A.; Brun, A. S.; Donati, J.-F.; Moutou, C.; Réville, V. (2019), "Chasing Star–Planet Magnetic Interactions: The Case of Kepler-78", The Astrophysical Journal 881 (2): 136, doi:10.3847/1538-4357/ab2ed5, Bibcode: 2019ApJ...881..136S
- ↑ Pepe, Francesco; Cameron, Andrew Collier; Latham, David W.; Molinari, Emilio; Udry, Stéphane; Bonomo, Aldo S.; Buchhave, Lars A.; Charbonneau, David et al. (2013). "An Earth-sized planet with an Earth-like density". Nature 503 (7476): 377–80. doi:10.1038/nature12768. PMID 24172902. Bibcode: 2013Natur.503..377P.
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