Exoplanet

11 Com b

Orbiting 11 Com

Overview

11 Com b is an exoplanet orbiting the star 11 Com, discovered in 2007 using the Radial Velocity method.

Key Measurements

Minimum Mass (M sin i)

4914.90

Earth masses

0500 M⊕

Orbital Period

323.2

days

0.1d10,000d

Distance

93.2

parsecs

Nearby10,000 pc

What these measurements mean

These comparisons use the reported catalog values. They are interpretations and calculations, not additional observations.

A year on this world
A 365.25-day Earth year spans about 1.13 of these orbits. 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.
Work through an exoplanet comparisonArchive measurement definitions

Radius (Earth radii)

Unknown

Minimum Mass, M sin(i) (Earth masses)

4914.90

Radial-velocity minimum

Equilibrium Temperature

Unknown

Parameter source: Teng et al. 2023

Orbital Period

323.210+0.060−0.050days

Semi-Major Axis

1.1780+0.0000−0.0000au

M sin(i) (Earth masses)

4914.90+39.09−39.73

M sin(i) (Jupiter masses)

15.4640+0.1230−0.1250

Eccentricity

0.2380+0.0070−0.0070

Epoch of Periastron

2454519.40+1.50−1.60days(JD)

Argument of Periastron

91.3+1.7−1.8deg

Radial Velocity Semi-Amplitude

288.63+2.39−2.37m/s

Distance from Earth

93.2 pc (~304 ly)

Spectral Type

G8 III

Temperature

4874 K

Mass (Solar)

2.09 M☉

Radius (Solar)

13.76 R☉

Luminosity

1.98 log L☉

Planets in System

1

Stars in System

2

Coordinates (RA, Dec)

185.1788°, 17.7933°

Discovery Method

Radial Velocity

Discovery Year

2007

Data Sources
NASA Exoplanet Archive

Source ID: 11 Com b

System Context

11 Com b orbits 11 Com and was reported in 2007 and was detected with the Radial Velocity method.

Published measurements list a minimum mass of 4,914.9 Earth masses (M sin i) and an orbital period of 323.21 days.

Catalog data places the system at about 93.2 parsecs from Earth, a host star classified as G8 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 11 Com