55 Cnc B b · Asteria Star

Scientific overview

55 Cnc B b is a super-earth orbiting 55 Cnc B, completing an orbit every 7 days, about 41 light-years from Earth. It was discovered in 2025 using the radial velocity method.

Host star

55 Cnc B

Spectral type

M4.5 V

Temperature

3,286 K

Mass

0.26 M☉

Planetary system — 55 Cnc B system

View the 55 Cnc B system (2 known planets).

Planet	Class	Radius (R⊕)	Period (d)	Distance (ly)
55 Cnc B bRadial Velocity · 2025	Super-Earth	1.69	6.7994	41
55 Cnc B cRadial Velocity · 2025	Super-Earth	2.16	33.747	41

Discovery and detection

Detection method

Radial Velocity Method

Discovery year

2025

Knowledge connections

Orbits55 Cnc B
Member of system55 Cnc B system
Discovered by methodRadial Velocity Method
Catalogued inNASA Exoplanet Archive

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