Discovery Method
Transit
Consistent across records
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ExoplanetDetail
Kepler-21 b
Host star Kepler-21 • 1.64 R⊕ • 2.79 d orbit
Records
13
archive rows
Discovery
2012
Transit
Radius
1.64 R⊕
default parameter set
Mass
7.50 M⊕
default parameter set
Kepler-21
2015 K equilibrium
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: Bonomo et al. 2023
Host Star
Kepler-21
Stable across source rows
Discovery Year
2012
Stable across source rows
Orbital Period
2.79 day
2.79 to 2.79
Semi-Major Axis
0.04 au
0.04 to 0.04
Radius
1.64 Rearth
1.57 to 1.89
Mass
7.50 Mearth
5.08 to 10.40
Density
9.30 g/cm**3
6.40 to 12.90
Equilibrium Temperature
2015 K
1784 to 2025
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 1.64 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
Kepler-21 b
1.64 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
13
Refs
13
Methods
1
Discoverystable
Facilitystable
Periodstable
Radiusdisputed
Massdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2012 | Transit | Kepler | 0.95 m Kepler Telescope | 2.79 day | 1.64 Rearth | 5.08 Mearth | 2025 K | López-Morales et al. 2016 |
| 2012 | Transit | Kepler | 0.95 m Kepler Telescope | 2.79 day | 1.64 Rearth | 7.50 Mearth | 2015 K | Bonomo et al. 2023 |
| 2012 | Transit | Kepler | 0.95 m Kepler Telescope | 2.79 day | 1.57 Rearth | — | — | Morton et al. 2016 |
| 2012 | Transit | Kepler | 0.95 m Kepler Telescope | 2.79 day | 1.64 Rearth | 10.40 Mearth | 1956 K | Howell et al. 2012 |
| 2012 | Transit | Kepler | 0.95 m Kepler Telescope | 2.79 day | 1.72 Rearth | — | 1863 K | Q1-Q8 KOI Table |
| 2012 | Transit | Kepler | 0.95 m Kepler Telescope | 2.79 day | — | — | — | Holczer et al. 2016 |
| 2012 | Transit | Kepler | 0.95 m Kepler Telescope | 2.79 day | — | — | — | Q1-Q17 DR25 Supplemental KOI Table |
| 2012 | Transit | Kepler | 0.95 m Kepler Telescope | 2.79 day | 1.65 Rearth | — | — | Fulton & Petigura 2018 |
| 2012 | Transit | Kepler | 0.95 m Kepler Telescope | 2.79 day | 1.59 Rearth | — | 1785 K | Q1-Q12 KOI Table |
| 2012 | Transit | Kepler | 0.95 m Kepler Telescope | 2.79 day | 1.69 Rearth | — | 1784 K | Q1-Q17 DR25 KOI Table |
| 2012 | Transit | Kepler | 0.95 m Kepler Telescope | — | 1.89 Rearth | — | — | Berger et al. 2018 |
| 2012 | Transit | Kepler | 0.95 m Kepler Telescope | 2.79 day | 1.59 Rearth | — | 1785 K | Q1-Q16 KOI Table |
| 2012 | Transit | Kepler | 0.95 m Kepler Telescope | 2.79 day | 1.59 Rearth | — | 1785 K | Q1-Q17 DR24 KOI Table |