KOI-3138.01
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| Exoplanet | List of exoplanets
| |||||
|---|---|---|---|---|---|---|
| Parent star | ||||||
| Star | KOI-3138 | |||||
| Right ascension | (α) | 292.503785 | ||||
| Declination | (δ) | 41.830421 | ||||
| Distance | 219 ly ( pc) | |||||
| Mass | (m) | 0.096±0 M☉ | ||||
| Radius | (r) | 0.118±0 R☉ | ||||
| Temperature | (T) | 2703 K | ||||
| Metallicity | [Fe/H] | 0 | ||||
| Physical characteristics | ||||||
| Radius | (r) | 0.57 R⊕ | ||||
| Temperature | (T) | 211 K (−62 °C; −80 °F) | ||||
| Orbital elements | ||||||
| Semi-major axis | (a) | 0.0378 AU | ||||
| Eccentricity | (e) | 0 | ||||
| Orbital period | (P) | 8.7 d | ||||
| Inclination | (i) | 89.95° | ||||
| Discovery information | ||||||
| Discovery date | 2011 | |||||
| Discoverer(s) | ||||||
| Discovery method | Transit | |||||
| Discovery site | Kepler Space Observatory | |||||
| Discovery status | Unconfirmed | |||||
KOI-3138.01 is a Mars-sized (subterran) exoplanet candidate orbiting the red dwarf KOI-3138 219 ly from the Sun. KOI-3138 is apparently smaller, cooler, and dimmer than Proxima Centauri.[1][2][3] It is the first known Mars-sized exoplanet that is potentially habitable.[3]
Comparison with Earth[edit]
|
|
Name | ESI | pClass | hClass | Distance (ly) | Status | Year of discovery |
References |
|---|---|---|---|---|---|---|---|---|
| N/A | Earth | 1.00 | G-warm terran | mesoplanet | — | — | — | - |
| KOI-3138.01 | 0.68 | M-warm subterran | Unknown | 219 | Kepler candidate | 2013 | [3] |
See also[edit]
References[edit]
- ↑ "Young Planets, Young Stars".
Harry R Ray: "I did some checking and found that KOI 3138 is smaller and cooler than Proxima Centauri (PROBABLY a M8) and the planet candidate, if it exists at all (check out the HEC habitable zone candidates table, and CLICK “KOI 3138.01. You will see that the orbital period is VERY POORLY DEFINED,ie 8.7 PLUS OR MINUS 3 days, which indicates a false positive or the MOST EXTREME TTV’s yet) it is completely deviod of any kind of atmosphere. KOI 3138 was RECLASSIFIED from a M! to a M8 a couple of years ago,and its distance shortened to around 225 light years. I was unaware Kepler was even sensitive enough to detect such a cool star that far away. If the entier K2 project is completed without incedent (ie all ten fields) we may see DOZENS of planet candidates around stars smaller and cooler than Proxima Centauri"
- ↑ "Beyond Earthly Skies KOI-3138".
- ↑ 3.0 3.1 3.2 "PHL Catalog data".
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