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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]
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 ]
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) | — | 0.0628 | 5.83393857±2.241 | 0 | — | — |
e(unconfirmed) | — | 0.0836 | 8.9772888±0.0001451 | 0 | — | — |