Skip to content

Missions Planets Black Holes 3D Map Agencies Blog About Sign in

Menu

Missions Planets Black Holes 3D Map Agencies Blog About Sign in

Acquiring mission data

Missions Planets Black Holes 3D Map Agencies Blog About apexandromeda.com

This is an independent informational project and is not affiliated with, endorsed by, or sponsored by NASA, ESA, JAXA, Roscosmos, CNSA, ISRO, CSA, or any other space agency. Agency names, logos, and other marks are used for identification where permitted by their respective usage policies.

A passion project from the team behind Apex Rental Pro.

55 Cnc B b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/55 Cnc B b

Confirmed exoplanet · Super Earth

55 Cnc B b

Orbiting 55 Cnc B

Discovered in 2025 using Radial Velocity. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic super earth catalog artwork; not a direct image of 55 Cnc B b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,025
Method: Radial Velocity
Radius: 1.69 R⊕
Mass: 3.5 M⊕
Orbit: 6.7994 days
Distance: 12.4773 pc

Planet profile

Orbit and physical properties

Orbital period: 6.7994 days
Semi-major axis: 0.044 AU
Eccentricity: 0
Radius: 1.69 Earth radii
Mass: 3.5 Earth masses
Mass provenance: Msini
Density: 3.98 g/cm³
Equilibrium temperature: 395.41 K
Insolation: 4.0271 Earth flux

Host system

Star and system properties

Host star: 55 Cnc B
Stars in system: 2
Known planets in system: 7
Spectral type: M4.5 V
Stellar temperature: 3,286 K
Stellar radius: 0.274 R☉
Stellar mass: 0.26 M☉
Stellar metallicity: 0.16 dex
Stellar age: 10 Gyr
Distance: 12.4773 parsecs
Right ascension: 08h52m40.30s
Declination: +28d18m55.03s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,025
Publication date: 2026-01
Discovery locale: Ground
Facility: Mauna Kea Observatory
Telescope: 3.58 m Canada-France-Hawaii Telescope (CFHT)
Instrument: SPIRou
NASA Exoplanet Archive: Open composite record ↗

Community discussion

Comments 0

No comments yet. The airlock is open.

Sign in or create an account to comment and vote.