4 UMa b
Orbiting 4 UMa
4 UMa b is an exoplanet orbiting the star 4 UMa, discovered in 2006 using the Radial Velocity method.
Minimum Mass (M sin i)
2511.48
Earth masses
Orbital Period
270.3
days
Distance
73.5
parsecs
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
2511.48
Radial-velocity minimum
Equilibrium Temperature
Unknown
Parameter source: Teng et al. 2023
Orbital Period
270.270+0.240−0.090days
Semi-Major Axis
0.8770+0.0010−0.0000au
M sin(i) (Earth masses)
2511.48+63.25−120.14
M sin(i) (Jupiter masses)
7.9020+0.1990−0.3780
Eccentricity
0.4530+0.0210−0.0360
Epoch of Periastron
2455958.10+2.30−4.10days(JD)
Argument of Periastron
28.6+3.2−5.4deg
Radial Velocity Semi-Amplitude
242.24+7.45−14.31m/s
Distance from Earth
73.5 pc (~240 ly)
Spectral Type
K1 III
Temperature
4415 K
Mass (Solar)
1.23 M☉
Radius (Solar)
18.11 R☉
Luminosity
Unknown
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
130.0528°, 64.3281°
Discovery Method
Radial Velocity
Discovery Year
2006
Source ID: 4 UMa b
4 UMa b orbits 4 UMa and was reported in 2006 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 2,511.48 Earth masses (M sin i) and an orbital period of 270.27 days.
Catalog data places the system at about 73.5 parsecs from Earth, a host star classified as K1 III, 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 4 UMa