Star system, 300 light-years
Kepler-1649 and its two planets
Kepler-1649 c is an exoplanet 1.06 times Earth's width, 300 light-years away, orbiting in its star's computed habitable zone.
Kepler-1649 is a star of spectral type the table does not record, 300 light-years from us, with two known planets. This page takes them one at a time.
Drawn at the system's own scale, every orbit from the Archive's numbers.
What is measured, what is computed, what is imagined.
measured The period, and where the table says so the width and the mass, by the method named in each section.
computed Anything marked computed: the size of an orbit where Kepler's third law corrects the table, the temperature of a bare ball at that distance, the starlight received, and the habitable zone.
imagined The picture is an artist's impression. Nobody has seen the surface of a planet of another star: its colour, clouds and land are not known, and the share picture says so in its corner.
The planets
Kepler-1649 b
Kepler-1649 b is an exoplanet 1.017 times Earth's width, 300 light-years away, orbiting closer to its star than the habitable zone we compute for it.
- Width
- 1.017 × Earth's measured
- Mass
- about 1.03 times Earth's estimated by the Archive from the planet's size, not measured
- One year
- 8.6891 days measured
- Distance from its star
- 0.04819 au computed from the period and the star's mass
- Temperature of a bare ball there
- 311 K computed, not measured
- Starlight, against Earth's
- 2.22 × computed
It was found as a small, regular dip in its star's light each time it crosses in front of it in 2017. Its orbit is closer to its star than the habitable zone computed for it. The Archive's own distance for it is 0.0514 au; the three papers behind its period, its star's mass and that distance do not agree with Kepler's third law, so the page uses the one the period and the star's mass give.
See Kepler-1649 b in 3D · The picture is an artist's impression.
Kepler-1649 c
Kepler-1649 c is an exoplanet 1.06 times Earth's width, 300 light-years away, orbiting in its star's computed habitable zone.
- Width
- 1.06 × Earth's measured
- Mass
- about 1.2 times Earth's estimated by the Archive from the planet's size, not measured
- One year
- 19.5353 days measured
- Distance from its star
- 0.0827 au computed from the period and the star's mass
- Temperature of a bare ball there
- 237 K computed, not measured
- Starlight, against Earth's
- 0.754 × computed
It was found as a small, regular dip in its star's light each time it crosses in front of it in 2020. Its orbit lies inside the conservative habitable zone computed for its star (liquid water on a rocky world's surface would be possible there, which says nothing about whether any is). The Archive's own distance for it is 0.0649 au; the three papers behind its period, its star's mass and that distance do not agree with Kepler's third law, so the page uses the one the period and the star's mass give.
See Kepler-1649 c in 3D · The picture is an artist's impression.
The star
- Surface temperature
- 3,240 K
- Width
- 0.232 × the Sun's
- Mass
- 0.1977 × the Sun's
- Distance
- 300 light-years
- Habitable zone, computed
- 0.07463 to 0.1468 au from the star