Kepler-88

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Star
Kepler-88
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation lyre
Right ascension 19 h 24 m 35.54 s
declination + 40 ° 40 ′ 9.8 ″
Typing
rel. Brightness
(G-band) 		(13.10 ± 0.01) mag
rel. Brightness
(J-band) 		(11.88 ± 0.02) mag
Known exoplanets 3
Spectral class G6 V
Astrometry
parallax (2.62 ± 0.01)  mas
distance (1244 ± 5)  ly
(381 ± 2)  pc
Proper movement 
Rec. Share: (1.11 ± 0.02)  mas / a
Dec. portion: (4.96 ± 0.03)  mas / a
Physical Properties
Dimensions (0.99 ± 0.02)  M ☉
radius (0.90 ± 0.02)  R ☉
Luminosity

(0.60 ± 0.07)  L ☉

Effective temperature (5470 ± 50)  K.
Metallicity [Fe / H] (0.27 ± 0.06)
Age (1.9 ± 1.6) bill.  A
Other names
and catalog entries
2MASS catalog 2MASS J19243554 + 4040098 [1]
Other names Kepler-88, KOI-142, KIC 5446285

Template: Infobox star / maintenance / magGTemplate: Infobox star / maintenance / magJ

Kepler-88 is a star in the constellation Lyra . The star is similar to the sun with a slightly lower mass and radius and accordingly also a lower luminosity . Two exoplanets were discovered near this star in 2013 with the help of the Kepler space telescope. It is the first system in which a planet was discovered using Transit Timing Variation (TTV) .

Planetary system

Kepler-88 b orbits the central star in about 11 days. The planet Kepler-88 c was discovered for the first time from interference in its signal using the method of transit timing variation . This planet orbits the star within 22 days and was later confirmed using the radial velocity method . In 2019, based on measurements of the radial velocity over a period of 6 years, the discovery of Kepler-88 d , another exoplanet in the system, was announced. The additional planet is significantly further away with an orbital period of about 1400 days and is said to have about 3 times the mass of Jupiter .

Kepler 88 planet
Planet
(order
from the star) 		Discovered Mass
( earth masses ) 		Radius
( earth radii ) 		Major semiaxis of
the railway
( AU ) 		Rotation time
( days ) 		eccentricity Orbit inclination
( degree )
b 2013 9.1 ± 1.1 3.56 ± 0.09 0.096 10.92 0.056 89.06 ± 0.07
c 2013 200.5 ± 2.9 - 0.155 22.26 0.057 86.2   +1.3−1.6
d 2019 965 ± 44 - 2.46 ± 0.04 1403 ± 14 0.41 ± 0.03 -

Individual evidence

  1. ↑ a b c d e KOI-142. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on August 4, 2019 .
  2. ↑ a b c d KOI-142. NASA Exoplanet Archives , accessed August 4, 2019 .
  3. ↑ a b c d e f Lauren M. Weiss et al .: The Discovery of the Long-Period, Eccentric Planet Kepler-88 d and System Characterization with Radial Velocities and Photodynamical Analysis . In: The Astronomical Journal . 159, No. 5. arxiv : 1909.02427 . bibcode : 2020AJ .... 159..242W . doi : 10.3847 / 1538-3881 / ab88 approx .
  4. ↑ David Nesvorný, David Kipping, Dirk Terrell, Joel Hartman, Gáspár Á. Bakos, Lars A. Buchhave: KOI-142, the King of Transit Variations, is a Pair of Planets Near the 2: 1 Resonance . In: The Astrophysical Journal . 777, No. 1, 2013, p. 3. arxiv : 1304.4283 . bibcode : 2013ApJ ... 777 .... 3N . doi : 10.1088 / 0004-637X / 777/1/3 .
  5. ^ SCC Barros et al .: SOPHIE velocimetry of Kepler transit candidates. X. KOI-142 c: first radial velocity confirmation of a non-transiting exoplanet discovered by transit timing . In: Astronomy & Astrophysics . 561, 2014, p. L1. arxiv : 1311.4335 . bibcode : 2014A & A ... 561L ... 1B . doi : 10.1051 / 0004-6361 / 201323067 .
  6. ↑ Kepler-88 d. Extrasolar Planets Encyclopaedia , accessed September 8, 2019 .