| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus[1] |
| Right ascension | 19h 33m 02.6305s[2] |
| Declination | +44° 52′ 08.020″[2] |
| Apparent magnitude (V) | 13.7[1] |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | G4V[1] |
| Astrometry | |
| Radial velocity (Rv) | −38.7±0.1[1] km/s |
| Proper motion (μ) | RA: −9.713(16) mas/yr[2] Dec.: −6.683(15) mas/yr[2] |
| Parallax (π) | 1.3650 ± 0.0122 mas[2] |
| Distance | 2,390 ± 20 ly (733 ± 7 pc) |
| Details | |
| Mass | 0.810+0.090 −0.081[1] M☉ |
| Radius | 0.93+0.018 −0.012[1] R☉ |
| Luminosity | 0.80+0.37 −0.22[1] L☉ |
| Surface gravity (log g) | 4.40±0.15[1] cgs |
| Temperature | 5638±168[1] K |
| Metallicity [Fe/H] | −0.29±0.15[1] dex |
| Age | 9.80+1.70 −4.10 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Kepler-69 (KOI-172, 2MASS J19330262+4452080, KIC 8692861) is a G-type main-sequence star similar to the Sun in the constellation Cygnus, located about 2,390 ly (730 pc) from Earth. On April 18, 2013 it was announced that the star has two planets.[1][3] Although initial estimates indicated that the terrestrial planet Kepler-69c might be within the star's habitable zone, further analysis showed that the planet very likely is interior to the habitable zone and is far more analogous to Venus than to Earth and thus completely inhospitable.[4]
- ^ a b c d e f g h i j k Barclay, Thomas; et al. (2013). "A super-Earth-sized planet orbiting in or near the habitable zone around Sun-like star". The Astrophysical Journal. 768 (2): 101. arXiv:1304.4941. Bibcode:2013ApJ...768..101B. doi:10.1088/0004-637X/768/2/101. S2CID 51490784.
- ^ a b c d Cite error: The named reference
Gaia DR3was invoked but never defined (see the help page). - ^ Johnson, Michele; Harrington, J.D. (18 April 2013). "NASA's Kepler Discovers Its Smallest 'Habitable Zone' Planets to Date". NASA. Retrieved 18 April 2013.
- ^ Kane, Stephen; et al. (2013). "A Potential Super-Venus in the Kepler-69 System". The Astrophysical Journal Letters. 770 (2): L20. arXiv:1305.2933. Bibcode:2013ApJ...770L..20K. doi:10.1088/2041-8205/770/2/L20. S2CID 9808447.