Kepler-1972 c
Kepler-1972 c is a terrestrial planet orbiting Kepler-1972 in the constellation Lyra. It lies about 937 light-years from Earth and was discovered in 2022 using the transit method.
How Big Is Kepler-1972 c?
Kepler-1972 c has a radius of 0.87 times that of Earth. Its mass is 2.1 times that of Earth, giving it a density of 18.40 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is Kepler-1972 c in the Habitable Zone?
The position of Kepler-1972 c relative to the habitable zone of Kepler-1972 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-1972: 1.051–2.473 AU (conservative: 1.331–2.345 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Orbit and Year Length
A year on Kepler-1972 c — one full orbit around Kepler-1972 — lasts 11.3 Earth days, shorter than Mercury's 88-day year. Its orbit is nearly circular (eccentricity 0.043).
How Was Kepler-1972 c Discovered?
Kepler-1972 c was discovered in 2022 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 Kepler-1972 c?
Kepler-1972 c is 937.2 light-years (287.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1089. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 16,494,720 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. Kepler-1972 c scores 0.30, ranking #1,404 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-1972
Kepler-1972
- Surface temperature
- 5,818 K (Sun: 5,772 K)
- Mass
- 1.12 M☉
- Radius
- 1.38 R☉
- Luminosity
- 1.9700 L☉
- Age
- 7.4 billion years (Sun: 4.6)
The Kepler-1972 Planetary System
Kepler-1972 c is one of 2 known planets in the Kepler-1972 system. Its siblings:
- Kepler-1972 b (Terrestrial)
Kepler-1972 c — Complete Data
| Radius | 0.868 Earth radii (0.077 Jupiter radii) |
|---|---|
| Mass | 2.11 Earth masses (0.007 Jupiter masses) |
| Density | 18.40 g/cm³ (Earth: 5.51) |
| Orbital period | 11.33 days |
| Eccentricity | 0.043 |
| Earth Similarity Index | 0.30 |
| Distance from Earth | 937.2 light-years (287.3 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2023-03-28. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-1972 c
Is Kepler-1972 c habitable?
Kepler-1972 c is not known to orbit within the habitable zone of Kepler-1972, and as a terrestrial planet it is an unlikely candidate for life as we know it.
How far away is Kepler-1972 c?
Kepler-1972 c is about 937 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 16,494,720 years to get there.
How big is Kepler-1972 c compared to Earth?
Kepler-1972 c has 0.87 times the radius of Earth and about 2.1 times its mass.
How long is a year on Kepler-1972 c?
One orbit around Kepler-1972 takes 11.3 Earth days — short enough that 32 of its years would fit into one Earth year.
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