Kepler-87
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| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| 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) |
| Other designations | |
| KOI-1574, 2MASS J19514005+4657544, KIC 10028792, WISE J195140.04+465754.4 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | 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
[edit]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 | — | — |
References
[edit]- ↑ 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.
- 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.
- ↑ "Kepler-87 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 10 September 2023.
- ↑ "The Extrasolar Planet Encyclopaedia — Kepler-87b". Extrasolar Planets Encyclopaedia. 1995. Retrieved 10 September 2023.
- ↑ "The Extrasolar Planet Encyclopaedia — Kepler-87c". Extrasolar Planets Encyclopaedia. 1995. Retrieved 10 September 2023.
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