11 UMi b
Orbiting 11 UMi
11 UMi b is an exoplanet orbiting the star 11 UMi, discovered in 2009 using the Radial Velocity method.
Minimum Mass (M sin i)
4684.81
Earth masses
Orbital Period
516.2
days
Distance
125.3
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 1.41 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)
4684.81
Radial-velocity minimum
Equilibrium Temperature
Unknown
Parameter source: Stassun et al. 2017
Orbital Period
516.220+3.200−3.200days
Semi-Major Axis
1.5300+0.0700−0.0700au
M sin(i) (Earth masses)
4684.81+794.58−794.58
M sin(i) (Jupiter masses)
14.7400+2.5000−2.5000
Eccentricity
0.0800+0.0300−0.0300
Radial Velocity Semi-Amplitude
189.70+7.20−7.20m/s
Distance from Earth
125.3 pc (~409 ly)
Spectral Type
Unknown
Temperature
4213 K
Mass (Solar)
2.78 M☉
Radius (Solar)
29.79 R☉
Luminosity
Unknown
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
229.2746°, 71.8239°
Discovery Method
Radial Velocity
Discovery Year
2009
Source ID: 11 UMi b
11 UMi b orbits 11 UMi and was reported in 2009 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 4,684.81 Earth masses (M sin i) and an orbital period of 516.22 days.
Catalog data places the system at about 125.3 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 11 UMi