Discovery Method
Transit
Consistent across records
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ExoplanetDetail
Kepler-9 c
Host star Kepler-9 • 8.08 R⊕ • 38.99 d orbit
Records
13
archive rows
Discovery
2010
Transit
Radius
8.08 R⊕
default parameter set
Mass
29.90 M⊕
default parameter set
Kepler-9
temperature unconstrained
Canonical Summary
Adopted planet values from the default parameter set
Values come from the archive's default parameter set. Missing values stay missing. Ranges and counts describe all source rows.
Selected source: Borsato et al. 2019
Host Star
Kepler-9
Stable across source rows
Discovery Year
2010
Stable across source rows
Orbital Period
38.99 day
38.91 to 38.99
Semi-Major Axis
0.23 au
0.23 to 0.23
Radius
8.08 Rearth
7.98 to 9.22
Mass
29.90 Mearth
27.29 to 509.7
Density
0.31 g/cm**3
0.28 to 0.38
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 8.08 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
Kepler-9 c
8.08 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
13
Refs
13
Methods
1
Discoverystable
Facilitystable
Perioddisputed
Radiusdisputed
Massdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | — | 8.21 Rearth | — | — | Berger et al. 2018 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 38.91 day | 8.22 Rearth | — | 536 K | Q1-Q8 KOI Table |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 38.91 day | 7.98 Rearth | — | 523 K | Q1-Q16 KOI Table |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 38.91 day | 8.11 Rearth | — | — | Fulton & Petigura 2018 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 38.91 day | 9.22 Rearth | 54.35 Mearth | — | Holman et al. 2010 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 38.91 day | — | — | — | Q1-Q17 DR25 Supplemental KOI Table |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 38.99 day | 8.08 Rearth | 29.90 Mearth | — | Borsato et al. 2019 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 38.99 day | — | 29.88 Mearth | — | Borsato et al. 2014 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 38.91 day | 8.11 Rearth | 27.29 Mearth | — | Weiss et al. 2024 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 38.95 day | — | — | — | Holczer et al. 2016 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 38.99 day | 8.65 Rearth | 509.7 Mearth | — | Hadden et al. 2014 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 38.97 day | 8.30 Rearth | 29.90 Mearth | — | Hadden & Lithwick 2017 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 38.91 day | 7.98 Rearth | — | 523 K | Q1-Q12 KOI Table |