Kepler-78

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Kepler-78
Kepler-78b.png
Artist's impression of the planet Kepler-78b around Kepler-78
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 19h 34m 58.0143s[1]
Declination +44° 26′ 53.961″[1]
Apparent magnitude (V) 11.72[2]
Characteristics
Spectral type G[3]
Astrometry
Proper motion (μ) RA: 37.807±0.973[1] mas/yr
Dec.: −16.348±0.696[1] mas/yr
Parallax (π) 8.02 ± 0.25[1] mas
Distance 410 ± 10 ly
(125 ± 4 pc)
Details[3]
Radius 0.74 R
Temperature 5089±50 K
Metallicity −0.14±0.08
Other designations
Kepler-78, KIC 8435766, TYC 3147-188-1, 2MASS J19345800+4426539
Database references
SIMBAD data
KIC data

Kepler-78 (formerly known as KIC 8435766) is a 12th magnitude star in the constellation Cygnus.[2] This star has a radius of about 74% of the Sun, and a temperature of about 5100 K.

Planetary system[edit]

Kepler-78 planetary system is composed by one 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.[4]

The Kepler-78 planetary system[4]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 1.86+0.38
−0.25
 M
0.0089 0.3550 ± 0.0004 0 79+9
−14
°
1.173+0.0159
−0.089
 R

References[edit]

  1. ^ a b c d e Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172Freely accessible. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. Gaia Data Release 1 catalog entry
  2. ^ a b "Kepler-78". SIMBAD. Centre de données astronomiques de Strasbourg. 
  3. ^ a b "Notes on Kepler-78 b". Retrieved 9 January 2017. 
  4. ^ a b Pepe, Francesco; Cameron, Andrew Collier; Latham, David W.; Molinari, Emilio; Udry, Stéphane; Bonomo, Aldo S.; Buchhave, Lars A.; Charbonneau, David; Cosentino, Rosario; Dressing, Courtney D.; Dumusque, Xavier; Figueira, Pedro; Fiorenzano, Aldo F. M.; Gettel, Sara; Harutyunyan, Avet; Haywood, Raphaëlle D.; Horne, Keith; Lopez-Morales, Mercedes; Lovis, Christophe; Malavolta, Luca; Mayor, Michel; Micela, Giusi; Motalebi, Fatemeh; Nascimbeni, Valerio; Phillips, David; Piotto, Giampaolo; Pollacco, Don; Queloz, Didier; Rice, Ken; et al. (2013). "An Earth-sized planet with an Earth-like density". Nature. 503 (7476): 377. arXiv:1310.7987Freely accessible. Bibcode:2013Natur.503..377P. doi:10.1038/nature12768. PMID 24172902.