Gliese 667 C c - exoplanet in the habitable zone , the second exoplanet of the star Gliese 667 C in the triple system Gliese 667 . The planet is about 22.7 light years away from Earth .
| Gliese 667 Cc | |
|---|---|
| Exoplanet | |
 Planet Gliese 667 Cc as an artist | |
| Parent star | |
| Star | Gliese 667 C |
| Constellation | Scorpio |
| Right ascension ( α ) | 17 h 18 m 59 s |
| Declination ( δ ) | −34 ° 58 ′ 48 ″ |
| Visible magnitude ( m V ) | 10.22 |
| Distance | 22.7 sv. of the year (6.2 ± 0.1 pc ) |
| Spectral class | M1V |
| Metallicity ([Fe / H]) | 26% |
| Age | ? billion years |
| Orbit elements | |
| Age of the orbit | JD 2451409,762 |
| Semi-axis ( a ) | 0.12 a. e. |
| Eccentricity ( e ) | 0 |
| Orbital period ( P ) | 28.1 ± 0.5 d. |
| Beam half ( K ) star speeds | ? m / s |
| physical characteristics | |
| Mass ( m ) | 0.26 M J (4.39 [1] [2] M ⊕ ) |
| Radius ( r ) | 0.20 R J (1.76 [1] R ⊕ ) |
| Temperature ( T ) | 3950 K |
| Opening Information | |
| opening date | November 29, 2011 |
| Detection method | Doppler method |
| Place of discovery | Geneva Observatory |
| Discovery status | Posted by |
Content
Orbit
The planet revolves around the red dwarf Gliese 667 C at a distance of 0.12 AU, its orbital period is 28.1 ± 0.5 Earth days.
Characteristics
The minimum mass of the planet is 3.8 Earth masses [1] [2] . Taking into account the fact that the radius of the effective earth orbit in this system is only 0.114 AU, the temperature regime of the planet is probably very close to the temperature regime of the Earth. A simulation of the Laboratory of Planetary Viability at the University of Puerto Rico in Arecibo shows that the average near-surface temperature of the atmosphere will be about 300 K (27 ° C) if the planet has an atmosphere similar to that of the Earth with a greenhouse effect due to the presence of 1% CO 2 and with an albedo of 0.3. According to calculations, the effective temperature will be 246 K (-27 ° C) with an albedo like that of the Earth (0.36) [3] . For comparison: the effective temperature of the Earth is 249 K, or −24 ° C.
The planet receives about 90% of the energy that the Earth receives from the Sun [2] . Almost certainly the planet is in tidal capture, i.e. turned to its star with only one side.
Living Conditions
If the inclination of its orbit is not too small and, accordingly, the mass is not too large, then the greenhouse effect created by a rather dense atmosphere, quite possibly creates sufficiently comfortable conditions on the surface of the planet for the existence of primitive life forms [4] .
Notes
- 2 1 2 3 PHL's Exoplanets Catalog - Planetary Habitability Laboratory @ UPR Arecibo
- ↑ 1 2 3
- ↑ HEC: Data of Potential Habitable Exoplanets and Exomoons Unsolved . Planetary Habitability Laboratory (March 16, 2012). The appeal date is March 19, 2012. Archived on June 5, 2012.
- ↑ GJ 667 Cc - a potentially habitable planet 7 pc from the Sun