Discovery Method
Radial Velocity
Consistent across records
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ExoplanetDetail
55 Cnc c
Host star 55 Cnc • 44.39 d orbit
Records
10
archive rows
Discovery
2004
Radial Velocity
Radius
—
default parameter set
Mass
56.60 M⊕
default parameter set
55 Cnc
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: Moutou et al. 2026
Host Star
55 Cnc
Stable across source rows
Discovery Year
2004
Stable across source rows
Orbital Period
44.39 day
43.93 to 44.42
Semi-Major Axis
0.25 au
0.23 to 0.25
Mass
56.60 Mearth
48.70 to 68.97
Provenance
Underlying measurements and references
Evidence Summary
Rows
10
Refs
10
Methods
1
Discoverystable
Facilitystable
Perioddisputed
Massdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2004 | Radial Velocity | McDonald Observatory | 9.2 m Hobby-Eberly Telescope | 44.38 day | — | 52.44 Mearth | — | Endl et al. 2012 |
| 2004 | Radial Velocity | McDonald Observatory | 9.2 m Hobby-Eberly Telescope | 44.38 day | — | 52.44 Mearth | — | Wright et al. 2009 |
| 2004 | Radial Velocity | McDonald Observatory | 9.2 m Hobby-Eberly Telescope | 43.93 day | — | 68.97 Mearth | — | McArthur et al. 2004 |
| 2004 | Radial Velocity | McDonald Observatory | 9.2 m Hobby-Eberly Telescope | 44.37 day | — | 56.70 Mearth | — | Nelson et al. 2014 |
| 2004 | Radial Velocity | McDonald Observatory | 9.2 m Hobby-Eberly Telescope | 44.42 day | — | 54.47 Mearth | — | Baluev 2015 |
| 2004 | Radial Velocity | McDonald Observatory | 9.2 m Hobby-Eberly Telescope | 44.39 day | — | 56.60 Mearth | — | Moutou et al. 2026 |
| 2004 | Radial Velocity | McDonald Observatory | 9.2 m Hobby-Eberly Telescope | 44.39 day | — | 48.70 Mearth | — | Harada et al. 2025 |
| 2004 | Radial Velocity | McDonald Observatory | 9.2 m Hobby-Eberly Telescope | 44.40 day | — | 51.20 Mearth | — | Bourrier et al. 2018 |
| 2004 | Radial Velocity | McDonald Observatory | 9.2 m Hobby-Eberly Telescope | 44.34 day | — | 53.71 Mearth | — | Fischer et al. 2008 |
| 2004 | Radial Velocity | McDonald Observatory | 9.2 m Hobby-Eberly Telescope | 44.38 day | — | 54.35 Mearth | — | Rosenthal et al. 2021 |