KOI-1843.03
KOI-1843.03 is a terrestrial planet orbiting Kepler-974 in the constellation Lyra. It lies about 438 light-years from Earth and was discovered in 2013 using the transit method.
How Big Is KOI-1843.03?
KOI-1843.03 has a radius of 0.61 times that of Earth. Its mass is 8.0 times that of Earth.
Is KOI-1843.03 in the Habitable Zone?
The position of KOI-1843.03 relative to the habitable zone of Kepler-974 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-974: 0.166–0.427 AU (conservative: 0.210–0.405 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 KOI-1843.03 — one full orbit around Kepler-974 — lasts just 4.2 hours, shorter than Mercury's 88-day year.
How Was KOI-1843.03 Discovered?
KOI-1843.03 was discovered in 2013 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-1843.03?
KOI-1843.03 is 438.1 light-years (134.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1588. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 7,710,560 years to make the journey.
The Host Star: Kepler-974
Kepler-974
- Surface temperature
- 3,687 K (Sun: 5,772 K)
- Mass
- 0.52 M☉
- Radius
- 0.50 R☉
- Age
- 4.4 billion years (Sun: 4.6)
The Kepler-974 Planetary System
KOI-1843.03 is one of 2 known planets in the Kepler-974 system. Its siblings:
- Kepler-974 b (Super Earth)
KOI-1843.03 — Complete Data
| Radius | 0.610 Earth radii (0.054 Jupiter radii) |
|---|---|
| Mass | 8.00 Earth masses (0.025 Jupiter masses) |
| Orbital period | 0.18 days |
| Distance from Earth | 438.1 light-years (134.3 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2013 |
Data: NASA Exoplanet Archive, last updated 2025-03-08. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About KOI-1843.03
Is KOI-1843.03 habitable?
KOI-1843.03 is not known to orbit within the habitable zone of Kepler-974, and as a terrestrial planet it is an unlikely candidate for life as we know it.
How far away is KOI-1843.03?
KOI-1843.03 is about 438 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 7,710,560 years to get there.
How big is KOI-1843.03 compared to Earth?
KOI-1843.03 has 0.61 times the radius of Earth and about 8.0 times its mass.
How long is a year on KOI-1843.03?
One orbit around Kepler-974 takes 0.2 Earth days — short enough that 2,065 of its years would fit into one Earth year.
Explore KOI-1843.03 in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
