The KOI-3503 System
KOI-3503 is a planetary system in the constellation Cygnus hosting 2 confirmed exoplanets, about 2,893 light-years from Earth.
Size Comparison: The Planets of KOI-3503
KOI-3503: Star and Habitable Zone
KOI-3503
- Surface temperature
- 6,001 K (Sun: 5,772 K)
- Mass
- 0.86 M☉
- Radius
- 1.25 R☉
Habitable zone of KOI-3503: 1.002–2.348 AU (conservative: 1.270–2.226 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 ›
All 2 Planets in the KOI-3503 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| KOI-3503 b | Terrestrial | 21 d | 1.19 R⊕ | 0.31 | 2021 |
| KOI-3503 c | Terrestrial | 32 d | 1.21 R⊕ | 0.32 | 2021 |
Discovery History
The first planet found here, KOI-3503 b, was discovered in 2021 using the transit method.
- 2021 — KOI-3503 b (Transit)
- 2021 — KOI-3503 c (Transit)
Frequently Asked Questions About KOI-3503
How many planets does KOI-3503 have?
KOI-3503 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the KOI-3503 system habitable?
None of the known planets in KOI-3503 orbit within the star's habitable zone.
How far away is KOI-3503?
KOI-3503 is about 2,893 light-years from Earth in the constellation Cygnus.
Explore the KOI-3503 system in the app
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