Discovery Method
Transit
Consistent across records
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ExoplanetDetail
XO-3 b
Host star XO-3 • 14.80 R⊕ • 3.19 d orbit
Records
17
archive rows
Discovery
2007
Transit
Radius
14.80 R⊕
default parameter set
Mass
4217.6 M⊕
default parameter set
XO-3
1890 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: Rusznak et al. 2025
Host Star
XO-3
Stable across source rows
Discovery Year
2007
Stable across source rows
Orbital Period
3.19 day
3.19 to 3.19
Semi-Major Axis
0.05 au
0.05 to 0.05
Radius
14.80 Rearth
13.64 to 21.86
Mass
4217.6 Mearth
2317.0 to 4217.6
Density
7.16 g/cm**3
7.16 to 8.10
Equilibrium Temperature
1890 K
1626 to 1890
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 14.80 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
XO-3 b
14.80 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
17
Refs
17
Methods
1
Discoverystable
Facilitystable
Periodstable
Radiusdisputed
Massdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | — | — | — | Wong et al. 2014 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | — | — | — | Garai et al. 2017 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | 13.64 Rearth | 3747.1 Mearth | — | Winn et al. 2008 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | 13.64 Rearth | 3718.6 Mearth | — | Bonomo et al. 2017 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | — | — | — | Patel & Espinoza 2022 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | 16.41 Rearth | — | 1626 K | ExoFOP |
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | 15.80 Rearth | 2317.0 Mearth | — | Stassun et al. 2017 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | — | — | — | Ivshina & Winn 2022 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | — | — | — | Kokori et al. 2023 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | — | — | — | Sodickson & Grunblatt 2025 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | 14.80 Rearth | 4217.6 Mearth | 1890 K | Rusznak et al. 2025 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | 13.99 Rearth | 3759.9 Mearth | 1729 K | Southworth 2010 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | — | — | 3861.6 Mearth | — | Knutson et al. 2014 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | — | — | — | — | Winn et al. 2009 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | — | — | — | — | Tsantaki et al. 2014 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | 21.86 Rearth | 4211.2 Mearth | — | Johns-Krull et al. 2008 |
| 2007 | Transit | XO | Canon 200mm f/1.8L | 3.19 day | — | — | — | Kokori et al. 2022 |