Discovery Method
Radial Velocity
Consistent across records
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ExoplanetDetail
GJ 436 b
Host star GJ 436 • 4.17 R⊕ • 2.64 d orbit
Records
24
archive rows
Discovery
2004
Radial Velocity
Radius
4.17 R⊕
default parameter set
Mass
22.10 M⊕
default parameter set
GJ 436
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: Maciejewski et al. 2014
Host Star
GJ 436
Stable across source rows
Discovery Year
2004
Stable across source rows
Orbital Period
2.64 day
2.60 to 2.64
Semi-Major Axis
0.03 au
0.03 to 0.03
Radius
4.17 Rearth
3.81 to 4.26
Mass
22.10 Mearth
21.23 to 25.40
Density
1.80 g/cm**3
1.69 to 2.09
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 4.17 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
GJ 436 b
4.17 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
24
Refs
24
Methods
1
Discoverystable
Facilitystable
Perioddisputed
Radiusdisputed
Massdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | 4.22 Rearth | 23.17 Mearth | 649 K | Torres et al. 2008 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | 3.96 Rearth | — | — | Knutson et al. 2011 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | 4.04 Rearth | — | — | Pont et al. 2009 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | 4.09 Rearth | 23.42 Mearth | 669 K | Southworth 2010 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | — | — | 21.68 Mearth | — | Knutson et al. 2014 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | — | 21.39 Mearth | — | Butler et al. 2006 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | — | 21.29 Mearth | — | Butler et al. 2004 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | — | 22.66 Mearth | — | Maness et al. 2007 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | — | — | — | Caceres et al. 2009 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | — | 21.68 Mearth | — | Wright et al. 2007 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | 4.19 Rearth | 23.14 Mearth | 686 K | Turner et al. 2016 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | 4.10 Rearth | 25.40 Mearth | — | Lanotte et al. 2014 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | 4.17 Rearth | 22.10 Mearth | — | Maciejewski et al. 2014 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.60 day | 4.26 Rearth | 23.20 Mearth | 650 K | Salz et al. 2015 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | — | — | — | Baluev et al. 2015 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | — | 25.40 Mearth | — | Bourrier et al. 2018 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | 3.81 Rearth | — | 594.0 K | ExoFOP |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | — | — | — | Mukherjee et al. 2025 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | 3.85 Rearth | 21.72 Mearth | — | Maxted et al. 2022 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | 4.20 Rearth | 23.10 Mearth | — | Shporer et al. 2009 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | — | 21.36 Mearth | — | Trifonov et al. 2018 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | — | 21.23 Mearth | — | Rosenthal et al. 2021 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | — | — | — | Kokori et al. 2022 |
| 2004 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 2.64 day | — | — | — | Kokori et al. 2023 |