16 Cyg B b
Orbiting 16 Cyg B
16 Cyg B b is an exoplanet orbiting the star 16 Cyg B, discovered in 1996 using the Radial Velocity method.
Minimum Mass (M sin i)
565.74
Earth masses
Orbital Period
798.5
days
Distance
21.1
parsecs
What these measurements mean
These comparisons use the reported catalog values. They are interpretations and calculations, not additional observations.
- A year on this world
- One orbit lasts about 2.19 Earth years. This comparison uses the reported orbital period. It does not measure the planet's rotation or the length of its day.
- What the mass can tell you
- M sin i is a lower bound on the true mass because the viewing angle affects the radial-velocity measurement. Do not treat it as an exact mass or use it to claim a measured density.
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
565.74
Radial-velocity minimum
Equilibrium Temperature
Unknown
Parameter source: Stassun et al. 2017
Orbital Period
798.500+1.000−1.000days
Semi-Major Axis
1.6600+0.0300−0.0300au
M sin(i) (Earth masses)
565.74+25.43−25.43
M sin(i) (Jupiter masses)
1.7800+0.0800−0.0800
Eccentricity
0.6800+0.0200−0.0200
Radial Velocity Semi-Amplitude
50.50+1.60−1.60m/s
Distance from Earth
21.1 pc (~69 ly)
Spectral Type
Unknown
Temperature
5750 K
Mass (Solar)
1.08 M☉
Radius (Solar)
1.13 R☉
Luminosity
Unknown
Planets in System
1
Stars in System
3
Coordinates (RA, Dec)
295.4656°, 50.5168°
Discovery Method
Radial Velocity
Discovery Year
1996
Source ID: 16 Cyg B b
16 Cyg B b orbits 16 Cyg B and was reported in 1996 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 565.74 Earth masses (M sin i) and an orbital period of 798.5 days.
Catalog data places the system at about 21.1 parsecs from Earth and 1 known planet in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open 16 Cyg B