Discovery Method
Transit
Consistent across records
←Back to Exoplanets
ExoplanetDetail
Kepler-9 b
Host star Kepler-9 • 8.29 R⊕ • 19.24 d orbit
Records
18
archive rows
Discovery
2010
Transit
Radius
8.29 R⊕
default parameter set
Mass
43.40 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
19.24 day
19.23 to 19.27
Semi-Major Axis
0.14 au
0.14 to 0.14
Radius
8.29 Rearth
7.74 to 9.44
Mass
43.40 Mearth
25.90 to 2175
Density
0.42 g/cm**3
0.27 to 0.52
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 8.29 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
Kepler-9 b
8.29 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
18
Refs
18
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 | 19.24 day | 8.20 Rearth | 43.50 Mearth | — | Hadden & Lithwick 2017 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.27 day | 7.96 Rearth | — | 661 K | Q1-Q17 DR24 KOI Table |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.23 day | 7.74 Rearth | 43.99 Mearth | — | Wang et al. 2018 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.25 day | — | — | — | Holczer et al. 2016 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.27 day | 8.09 Rearth | 25.90 Mearth | — | Weiss et al. 2024 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.24 day | — | 43.54 Mearth | — | Borsato et al. 2014 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.27 day | — | — | — | Q1-Q17 DR25 Supplemental KOI Table |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.27 day | 8.09 Rearth | — | — | Fulton & Petigura 2018 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.27 day | 8.28 Rearth | — | 678 K | Q1-Q8 KOI Table |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.24 day | 9.44 Rearth | 80.09 Mearth | — | Holman et al. 2010 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | — | 7.97 Rearth | — | — | Berger et al. 2018 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.27 day | 8.09 Rearth | — | — | Morton et al. 2016 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.24 day | 8.85 Rearth | 2175 Mearth | — | Hadden et al. 2014 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.27 day | 7.96 Rearth | — | 661 K | Q1-Q12 KOI Table |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.24 day | 8.29 Rearth | 43.40 Mearth | — | Borsato et al. 2019 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.27 day | 7.96 Rearth | — | 661 K | Q1-Q16 KOI Table |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | — | — | — | — | Albrecht et al. 2021 |
| 2010 | Transit | Kepler | 0.95 m Kepler Telescope | 19.27 day | 7.74 Rearth | — | 661 K | Q1-Q17 DR25 KOI Table |