Discovery Method
Imaging
Consistent across records
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ExoplanetDetail
HR 8799 d
Host star HR 8799 • 13 R⊕ • 37000 d orbit
Records
4
archive rows
Discovery
2008
Imaging
Radius
13 R⊕
default parameter set
Mass
3000 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
37000 day
37000 to 4.16e4
Semi-Major Axis
24 au
24 to 26.97
Radius
13 Rearth
10.09 to 13
Mass
3000 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 d
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 | W. M. Keck Observatory | 10 m Keck II Telescope | — | 10.09 Rearth | — | 1300 K | Bonnefoy et al. 2016 |
| 2008 | Imaging | W. M. Keck Observatory | 10 m Keck II Telescope | — | — | — | — | Konopacky et al. 2016 |
| 2008 | Imaging | W. M. Keck Observatory | 10 m Keck II Telescope | 37000 day | 13 Rearth | 3000 Mearth | — | Marois et al. 2008 |
| 2008 | Imaging | W. M. Keck Observatory | 10 m Keck II Telescope | 4.16e4 day | — | — | — | Zurlo et al. 2016 |