stars
exoplanets
news
Exoplanet Kepler-444 A d
Exoplanet Kepler-444 A d orbits star Kepler-444 A that lies 119 light years away from the Sun.
It weighs about 0.036 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
119 light years
119 light years
Loading may take a moment.
Kepler-444 A d
Exoplanet
Star: Kepler-444 A
Distance from the star: 0.06 AU
Orbit around star: 6.189392 days
+
Orbital period
Orbital period of exoplanet Kepler-444 A d around its star is 6.189392 days.
The orbital period of an exoplanet is the time it takes to complete one full orbit around its star, usually measured in days. Most of the exoplanets discovered so far have orbital periods of less than one year...
More about Orbital period in StellarGuide
Eccentricity: 0.18Basic characteristic
Mass: 0.036 M Earth
Exoplanet mass
Exoplanet Kepler-444 A d has 0.036 Earth masses, or 0.65 times the mass of Mercury.
The mass of an exoplanet is one of the most important characteristics for understanding what kind of world it is — whether it’s small and rocky like Earth or large and gaseous like Jupiter. Mass provides key information about the planet’s composition, gravity, and formation history...
More about Exoplanet mass in StellarGuide
Size: 0.53 R Earth
Density: 1333 kg/m3 | 24.18 % Earth
Year of discovery: 2015 (transit)
Other designations of this exoplanet
BD+41°3306 d, WDS J19190+4138 d, KOI-3158 d, KIC 6278762 d, 2MASS J19190052+4138043 d, Gaia DR2 2101486923385239808 d, HIP 94931 d, LHS 3450 d, TYC 3129-00329-1 d, 2MASS J19190052+4138043 d, Gaia DR2 2101486923382009472 d
BD+41°3306 d, WDS J19190+4138 d, KOI-3158 d, KIC 6278762 d, 2MASS J19190052+4138043 d, Gaia DR2 2101486923385239808 d, HIP 94931 d, LHS 3450 d, TYC 3129-00329-1 d, 2MASS J19190052+4138043 d, Gaia DR2 2101486923382009472 d
Advertisement
Kepler-444 system structure
Exoplanet Kepler-444 A d orbits star Kepler-444 A, which has lower mass than Sun. It is one of 5 known exoplanets orbiting this star.
|
|
Kepler-444 A | ||||||||
| Kepler-444 A b | 0.04 AU | 0.4 R⊕ | 3.6 days | ||||||
| Kepler-444 A c | 0.05 AU | 0.5 R⊕ | 4.5 days | ||||||
| Kepler-444 A d | 0.06 AU | 0 M⊕ | 0.5 R⊕ | 6.2 days | |||||
| Kepler-444 A e | 0.07 AU | 0 M⊕ | 0.5 R⊕ | 7.7 days | |||||
| Kepler-444 A f | 0.08 AU | 0.7 R⊕ | 9.7 days | ||||||
|
|
Kepler-444 B | ||||||||
|
|
Kepler-444 C | ||||||||
Comparison
When comparing to the Solar system planets, Kepler-444 A d has 65 % of mass of Mercury and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
|
Mass | 0.65 | 0.04 | 0.04 | 0.33 | 0 | 0 | 0 | 0 |
|
Size | 1.38 | 0.56 | 0.53 | 1 | 0.05 | 0.06 | 0.13 | 0.14 |
|
Density | 0.25 | 0.25 | 0.24 | 0.33 | 1.07 | 1.91 | 1.06 | 0.77 |
|
Distance | 0.15 | 0.08 | 0.06 | 0.04 | 0.01 | 0.01 | 0 | 0 |
Habitability
Habitable zone of the star: 0.7 - 1 AU
The planet is too hot to sustain liquid water.
The planet has mass comparable to Earth.