Kepler-452
 A diagram of the Kepler-452b System, compared to our Inner Solar System and the Kepler-186 system. | |
| Characteristics | |
|---|---|
| Evolutionary stage | Main sequence |
| Spectral type | G2V |
| Observation data Epoch J2000 Equinox J2000 | |
| Constellation | Cygnus |
| Right ascension | 19h 44m 0.9s[1] |
| Declination | +44° 16′ 39.2″[1] |
| Apparent magnitude (V) | 13.426[2] |
| Astrometry | |
| Distance | 1400 ly (430 pc) |
| Details | |
| Mass | 1.037+0.054 −0.047 M☉ |
| Radius | 1.11+0.15 −0.09 R☉ |
| Luminosity | 1.2 L☉ |
| Surface gravity (log g) | 4.32±0.09 cgs |
| Temperature | 5757±85 K |
| Metallicity [Fe/H] | 0.21±0.09 dex |
| Age | 6±2 Gyr |
| Other designations | |
KOI-07016, KIC-8311864, 2MASS 19440088+4416392 | |
| Database references | |
| Exoplanet Archive | 452-b data |
Kepler-452 is a G-type main-sequence star located about 1400 light-years away from Earth in the constellation of Cygnus.[3] It has a similar temperature as that of the Sun, but it is 20 percent brighter, 3.7 percent more massive and has diameter that is 11 percent larger.[4][5] Its gravity is 4.32±0.09 cgs.[1] It is approximately six billion years old, 1.5 billion years older than the Sun.[6]
Planetary system
It has at least one confirmed exoplanet, Kepler-452b, discovered in July 2015 by the Kepler spacecraft.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 5 ± 2 M⊕ | 1.046+0.019 −0.015 |
371.843+0.007 −0.012 |
— | 89.806+0.134 −0.049° |
1.6 R⊕ |
References
- 1 2 3 4 "NASA Exoplanet Archive – Confirmed Planet Overview – Kepler-452b". NASA Exoplanet Archive. 2015. Retrieved 23 July 2015.
- ↑ "Kepler Input Catalog search result". Space Telescope Science Institute. Retrieved 25 July 2015.
- ↑ Witze, Alexandra (July 23, 2015). "NASA spies Earth-sized exoplanet orbiting Sun-like star". Nature. Retrieved 23 July 2015.
- ↑ Chou, Felicia; Johnson, Michelle (July 23, 2015). "NASA’s Kepler Mission Discovers Bigger, Older Cousin to Earth". NASA. Retrieved 23 July 2015.
- ↑ Rincon, Paul (July 23, 2015). "'Earth 2.0' found in Nasa Kepler telescope haul". BBC. Retrieved 23 July 2015.
- ↑ Jenkins, Jon M.; Twicken, Joseph D.; Batalha, Natalie M.; Caldwell, Douglas A.; Cochran, William D.; Endl, Michael,... & Boruck, William J. (2015). "Discovery and validation of Kepler-452b: A 1.6 R⨁ super Earth exoplanet in the habitable zone of a G2 star". The Astronomical Journal (Institute of Physics) 105 (2). arXiv:1507.06723. Bibcode:2015AJ....150...56J. doi:10.1088/0004-6256/150/2/56.
This article is issued from Wikipedia - version of the Thursday, April 21, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.