KOI-1599.02
KOI-1599.02 is a super-Earth orbiting KOI-1599 in the constellation Cygnus. It lies about 3,691 light-years from Earth and was discovered in 2019 using the transit method.
How Big Is KOI-1599.02?
KOI-1599.02 has a radius of 1.90 times that of Earth. Its mass is 9.0 times that of Earth.
Is KOI-1599.02 in the Habitable Zone?
The position of KOI-1599.02 relative to the habitable zone of KOI-1599 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on KOI-1599.02 — one full orbit around KOI-1599 — lasts 13.6 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.112 AU — closer to its star than Mercury is to the Sun. Its orbit is nearly circular (eccentricity 0.011).
How Was KOI-1599.02 Discovered?
KOI-1599.02 was discovered in 2019 using the transit method, with observations from Kepler.
The transit method watches a star for the tiny, regular dip in brightness that occurs when a planet crosses in front of it. The depth and timing of these dips reveal the planet's size and orbital period.
How Far Away Is KOI-1599.02?
KOI-1599.02 is 3,690.9 light-years (1,131.6 parsecs) from Earth. Light arriving here tonight left the planet about 3,691 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 64,959,840 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. KOI-1599.02 scores 0.27, ranking #2,577 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: KOI-1599
KOI-1599
- Mass
- 1.02 M☉
- Radius
- 0.97 R☉
The KOI-1599 Planetary System
KOI-1599.02 is one of 2 known planets in the KOI-1599 system. Its siblings:
- KOI-1599.01 (Super Earth)
KOI-1599.02 — Complete Data
| Radius | 1.900 Earth radii (0.170 Jupiter radii) |
|---|---|
| Mass | 9.00 Earth masses (0.028 Jupiter masses) |
| Orbital period | 13.61 days |
| Orbital distance | 0.112 AU |
| Eccentricity | 0.011 |
| Earth Similarity Index | 0.27 |
| Distance from Earth | 3,690.9 light-years (1,131.6 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2019 |
Data: NASA Exoplanet Archive, last updated 2019-05-20. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About KOI-1599.02
Is KOI-1599.02 habitable?
KOI-1599.02 is not known to orbit within the habitable zone of KOI-1599, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is KOI-1599.02?
KOI-1599.02 is about 3,691 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 64,959,840 years to get there.
How big is KOI-1599.02 compared to Earth?
KOI-1599.02 has 1.90 times the radius of Earth and about 9.0 times its mass.
How long is a year on KOI-1599.02?
One orbit around KOI-1599 takes 13.6 Earth days — short enough that 27 of its years would fit into one Earth year.
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