Discovery Method
Imaging
Consistent across records
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ExoplanetDetail
HR 8799 b
Host star HR 8799 • 13 R⊕ • 170000 d orbit
Records
4
archive rows
Discovery
2008
Imaging
Radius
13 R⊕
default parameter set
Mass
2000 M⊕
default parameter set
HR 8799
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: Marois et al. 2008
Host Star
HR 8799
Stable across source rows
Discovery Year
2008
Stable across source rows
Orbital Period
170000 day
1.67e5 to 1.72e5
Semi-Major Axis
68 au
67.96 to 70
Radius
13 Rearth
6.73 to 13
Mass
2000 Mearth
single adopted value
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 13 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
HR 8799 b
13 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
4
Refs
4
Methods
1
Discoverystable
Facilitystable
Perioddisputed
Radiusdisputed
Massstable
Eq. Tempstable
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2008 | Imaging | Gemini Observatory | 8.19 m Gemini North Telescope | 1.72e5 day | — | — | — | Konopacky et al. 2016 |
| 2008 | Imaging | Gemini Observatory | 8.19 m Gemini North Telescope | — | 6.73 Rearth | — | 1200 K | Bonnefoy et al. 2016 |
| 2008 | Imaging | Gemini Observatory | 8.19 m Gemini North Telescope | 1.67e5 day | — | — | — | Zurlo et al. 2016 |
| 2008 | Imaging | Gemini Observatory | 8.19 m Gemini North Telescope | 170000 day | 13 Rearth | 2000 Mearth | — | Marois et al. 2008 |