Kepler-87

Last updated
Kepler-87
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Cygnus [1]
Right ascension 19h 51m 40.0490s [2]
Declination +46° 57 54.425 [2]
Apparent magnitude  (V)15
Characteristics
Spectral type G4IV
Variable type planetary transit
Astrometry
Proper motion (μ)RA: −4.382(19) mas/yr [2]
Dec.: −0.821(20) mas/yr [2]
Parallax (π)0.7803±0.0154  mas [2]
Distance 4,180 ± 80  ly
(1,280 ± 30  pc)
Details
Mass 1.01  M
Radius 1.49669  R
Luminosity 0.3260445  L
Temperature 5692 ± 60.7121  K
Metallicity [Fe/H]0.0562149±0.0587866  dex
Age 7.24+1.50
−1.56
 years
Other designations
KOI-1574, 2MASS J19514005+4657544, KIC 10028792, WISE J195140.04+465754.4
Database references
SIMBAD data

Kepler-87 is a star slightly more massive than the Sun and it is nearing the end of its main-sequence period. [3]

Planetary system

Kepler-87 hosts four planets, two confirmed (Kepler-87b, [4] Kepler-87c [5] and two unconfirmed (Kepler-87d, Kepler-87e). It is the farthest system from the Sun with two unconfirmed planet candidates at 4021 light-years.[ citation needed ]

The Kepler-87 planetary system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 1.02+0.16
−0.16
  MJ
0.481+0.026
−0.028
114.73635+0.00015
−0.00015
0.036±0.009
c 0.02+0.003
−0.003
  MJ
0.676+0.037
−0.04
191.2318+0.0015
−0.0015
0.039±0.012
d(unconfirmed)0.06285.83393857±2.2410
e(unconfirmed)0.08368.9772888±0.00014510

References

  1. Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. "Kepler-87 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 10 September 2023.
  4. "The Extrasolar Planet Encyclopaedia — Kepler-87b". Extrasolar Planets Encyclopaedia . 1995. Retrieved 10 September 2023.
  5. "The Extrasolar Planet Encyclopaedia — Kepler-87c". Extrasolar Planets Encyclopaedia . 1995. Retrieved 10 September 2023.