Kepler-62 e is the fourth most remote exoplanet found in the star Kepler-62 , located in the constellation Lyra [1] . It, together with the planet Kepler-62 f, can be inhabited. It is one and a half times larger than the Earth, which means it can hold the atmosphere. Scientists suggest that this planet may be completely covered by the ocean.
| Kepler-62 e | |
|---|---|
| Exoplanet | |
| Parent star | |
| Star | Kepler-62 |
| Constellation | Lyra |
| Right Ascension ( α ) | 18 h 52 m 51.06 s |
| Declination ( δ ) | + 45 ° 20 ′ 59.5 ″ |
| Visible magnitude ( m V ) | 13.75 |
| Distance | 1199.7 St. of the year (~ 368 pc ) |
| Spectral class | K2V |
| Metallicity ([Fe / H]) | -0.37 |
| Age | 7 ± 4 billion years |
| Elements of the orbit | |
| Semimajor axis ( a ) | ~ 0.427 a. e. |
| Orbital Period ( P ) | 122.3874 d. |
| Inclination ( i ) | 89.98 ° |
| physical characteristics | |
| Weight ( m ) | 0.0125 M J (2.5-3 M ⊕ ) |
| Radius ( r ) | 0.15 R J (1.6 R ⊕ ) |
| Radiation flux from the star ( E ) | 1.16 ⊕ |
| Gravity ( g ) | 11.508 m / s² (1.1730 g ) |
| Temperature ( T ) | 250.75 K (with an atmosphere similar to Martian), 276 K (with an atmosphere similar to terrestrial), 390.15 (with an expected atmosphere of 196 kPa with 95% carbon dioxide) K |
| Discovery Information | |
| opening date | 2013 |
| Discoverer (s) | Scientific group of the Kepler telescope |
| Detection method | Transit method |
| Opening place | Kepler telescope |
| Opening status | Confirmed by |
Content
- 1 Discovery History
- 2 Vitality
- 3 Comparison with the Earth
- 4 notes
- 5 Links
Discovery History
The planet Kepler-62 e was discovered in 2013 along with other system planets at the orange dwarf Kepler-62 with the Kepler telescope, which observes stellar transits. Scientists believe that the last two planets of this system can be inhabited.
Suitability
The Kepler-62e exoplanet SPH index is 0.96, i.e. higher than Earth . If you look at the effective Earth orbit of the star Kepler-62 , then this planet is only 7% closer to its star than the Earth [2] . However, if we take into account the stellar temperature coefficient (which is 9% lower than the temperature on the Sun) and the 7 percent difference in distances with the effective Earth’s orbit, it turns out that at an atmospheric pressure of 100 kPa its average temperature will be about 17 degrees Celsius , t that is, it will be a “resort with eternal spring”, the average temperature on its surface will be 16% higher than the average temperature on Earth (15 ° C). But if the density of its atmosphere is the same as that of the Earth, then there will be no polar caps on it, perhaps a hundred-kilometer layer of water ( hydrosphere ) will envelop it. Because of this, it will have a big greenhouse effect . To be the main contender for the title “ Earth 2.0 ”, it must have an atmosphere that is 3-4% less dense than the earthly one, since this is a fairly significant difference, and at the same time it should have at least 15% land, otherwise it will be a thermo- planet, an ocean with a greenhouse atmosphere , and its average temperature will be significantly higher than 17 ° C (about 25 ° C, Gibraltar , Morocco , i.e., semi-desert ). But even with an unfavorable combination of circumstances, in her over-ocean will be almost ideal conditions for the existence of underwater life. And at the same time, the probability of nucleation on this planet of at least unicellular organisms is approximately 70–80%, since all the necessary conditions exist for this. This is also indicated by a high ESI index of 0.86.
But most likely it has an atmosphere that is 1.5–2 times denser than the Earth’s, because this is indicated by the scientifically valid HZA index, whose value is +0.04, that is, as much as 56 points higher than the value of the Earth’s HZA index (-0.52), and the density of its atmosphere should be approximately 196 kPa.
At a temperature of ~ 114 ° C near the equator, there will be no life anywhere except the poles. If there is an axis tilt on this planet, this will allow organisms to be in the winter hemisphere and wander (fly over) to another if it gets hot. The main thing is that the slope should not be too large, otherwise during the transition the animals will have to overcome too wide a hot belt of illumination.
Earth Comparison
Below are the comparative characteristics of the Earth and the Kepler-62e:
| # | Title | ESI | SPH | Hzd | Hzc | Hza | pClass | hClass | Distance ( St. years ) | Status | Year discoveries |
|---|---|---|---|---|---|---|---|---|---|---|---|
| N / A | Earth | 1.00 | 0.72 | -0.50 | -0.31 | -0.52 | warm earth | mesoplanet | 0 | not an exoplanet | prehistoric |
| 1 | Kepler-62e | 0.86 | 0.96 | -0.63 | -0.15 | +0.04 | warm super earth | mesoplanet | 1200 | confirmed by | 2013 |
Despite the fact that the mass of the exoplanet is 3 times greater than the earth, the gravity there is only 17.3% more than on Earth.
Notes
- ↑ Kepler-62e: Super-Earth and Possible Water World
- ↑ Kepler-62, KOI-701, KIC 9002278 . www.allplanets.ru. Date of treatment January 8, 2016.