Discovery Method
Radial Velocity
Consistent across records
←Back to Exoplanets
ExoplanetDetail
55 Cnc b
Host star 55 Cnc • 14.65 d orbit
Records
14
archive rows
Discovery
1996
Radial Velocity
Radius
—
default parameter set
Mass
276 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
1996
Stable across source rows
Orbital Period
14.65 day
14.47 to 14.67
Semi-Major Axis
0.12 au
0.11 to 0.12
Mass
276 Mearth
240 to 289.2
Provenance
Underlying measurements and references
Evidence Summary
Rows
14
Refs
14
Methods
1
Discoverystable
Facilitystable
Perioddisputed
Massdisputed
Eq. Tempstable
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.65 day | — | 254.2 Mearth | — | Endl et al. 2012 |
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.65 day | — | 289.2 Mearth | — | Naef et al. 2004 |
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.65 day | — | 260.6 Mearth | — | Wright et al. 2009 |
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.65 day | — | 267.0 Mearth | — | Butler et al. 1997 |
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.65 day | — | 267.0 Mearth | — | Marcy et al. 2002 |
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.67 day | — | 249.2 Mearth | — | McArthur et al. 2004 |
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.47 day | — | 267.0 Mearth | — | Nelson et al. 2014 |
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.65 day | — | 264.0 Mearth | — | Baluev 2015 |
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.60 day | — | 254.2 Mearth | 700 K | Salz et al. 2015 |
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.65 day | — | 276 Mearth | — | Moutou et al. 2026 |
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.65 day | — | 240 Mearth | — | Harada et al. 2025 |
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.65 day | — | 255.4 Mearth | — | Bourrier et al. 2018 |
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.65 day | — | 261.9 Mearth | — | Fischer et al. 2008 |
| 1996 | Radial Velocity | Lick Observatory | 3.0 m C. Donald Shane Telescope | 14.65 day | — | 267.3 Mearth | — | Rosenthal et al. 2021 |