---
title: "The Kepler-247 system"
url: "https://spacecatalog.org/system/kepler-247"
release: "DR1"
licence: "No licence stated; acknowledgement requested"
citation: "This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Cite Christiansen et al. (2025), Planetary Science Journal (doi:10.3847/PSJ/ade3c2), and the literature reference given with each value."
---

# The Kepler-247 system

Kepler-247 is a K orange star in Lyra, 2165 ly away, with 4 known planets. Their orbits run from 0.0420 to 0.141 AU. All but one were detected by transit.

## The planets, innermost first

| Planet | Orbit (AU) | Period | Radius | Mass | Equilibrium T |
| --- | --- | --- | --- | --- | --- |
| [b](https://spacecatalog.org/object/kepler-247-b) | 0.0420 | 3.336 d | 1.64 R⊕ | 3.33 M⊕ | 970 K |
| [c](https://spacecatalog.org/object/kepler-247-c) | 0.0840 | 9.439 d | 4.09 R⊕ | 15.7 M⊕ | 686 K |
| [d](https://spacecatalog.org/object/kepler-247-d) | 0.141 | 20.47 d | 4.50 R⊕ | 50 M⊕ | 530 K |
| [KOI-884 e](https://spacecatalog.org/object/koi-884-e) | — | 31.1 d | 9.54 R⊕ | 66.1 M⊕ | — |

1 with no published orbit, sorted last.

Every figure is the planet's composite parameter from the [NASA Exoplanet Archive (Planetary Systems Composite Parameters)](https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars), one consistent set per world. Semi-major axes are orbits about the star, not distances from Earth.

This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Cite Christiansen et al. (2025), Planetary Science Journal (doi:10.3847/PSJ/ade3c2), and the literature reference given with each value.

## The host star

| Quantity | Value |
| --- | --- |
| CLASS | K orange star |
| SPECTRAL TYPE | K |
| MASS | 0.887 M☉ |
| RADIUS | 0.788 R☉ |
| SURFACE TEMPERATURE | 5060 K |
| LUMINOSITY | 0.367 L☉ |
| DISTANCE FROM EARTH | 2165 ly |
| APPARENT MAGNITUDE | 15.20 |
| CONSTELLATION | Lyra |
| STARS IN SYSTEM | 1 |

The star itself: https://spacecatalog.org/object/kepler-247

The page itself, with the orbits drawn: https://spacecatalog.org/system/kepler-247