Key parameters at a glance

A radius of 12.20 Earth radii
A mass of 4,914.90 Earth masses
Surface gravity around 33.02 g
An orbital period of 323.210 days
Semi-major axis 1.1780 AU
Distance from Earth 303.93 light-years
Earth Similarity Index 0.324
Travel time at Voyager 1 speed 5,359,755 years

11 Com b Planet Profile

Physical Specs

Radius

12.20 R⊕

Radius (Jupiter)

1.090 R♃

Mass

4,914.90 M⊕

Mass (Jupiter)

15.464 M♃

Density

14.90 g/cm³

Surface Gravity

33.02 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.324

HZ Position Unknown

Controversial No

Discovery

Year 2007

Method Radial Velocity

Facility Xinglong Station

Telescope 2.16 m Telescope

Size rank in cohort

Rank by radius

#1410of 1771

top 79.6%

This planet

12.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

FU Tau b 12.20 R⊕ HD 168443 c 12.20 R⊕ HIP 5158 c 12.20 R⊕

Metric	Earth	11 Com b	Jupiter
Radius (R⊕)	1.00	12.20	11.21
Mass (M⊕)	1.00	4,914.90	317.83
Density (g/cm³)	5.51	14.90	1.33
Surface Gravity (g)	1.00	33.02	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	4,914.898 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 107383

HIP

HIP 60202

TIC

TIC 72437047

Gaia DR2

Gaia DR2 3946945413106333696

Gaia DR3

Gaia DR3 3946945413106333696

System

11 Com

Percentile among Gas Giant cohort

Radius 12.200 R⊕ · percentile 19 / cohort 1771

Mass 4,914.898 M⊕ · percentile 94 / cohort 1747

Orbital period 323.21 d · percentile 61 / cohort 1533

Distance 93.18 pc · percentile 34 / cohort 1759

ESI 0.324 · percentile 64 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

323.210 days

Semi-major axis

1.1780 AU

Eccentricity

0.238

Inclination

— °

Year Length

A year here lasts approximately 323.21 Earth days (88.5% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 1.1780 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.324

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Liu et al. 2008

Instrument

Coude Echelle Spectrograph

Publication

2008-01

Observation locale

Ground

Host System: 11 Com

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

4,874 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

13.760 R☉

Stellar Mass

2.090 M☉

Metallicity [Fe/H]

-0.26

Extended Stellar Properties

Surface gravity (log g)

2.450 dex

Systemic radial velocity

43.37 km/s

Rotational v·sin i

1.20 km/s

Metallicity ratio

[Fe/H]

Distance

93.18 parsec

Light-years 303.93 ly

V-band magnitude

4.72 mag

Voyager-speed travel 5,359,755 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

10.710 mas

Total Proper Motion

140.384 mas/yr

PM Right Ascension

-109.24 mas/yr

PM Declination

88.17 mas/yr

Galactic Cartesian (pc)

x = -0.948 · y = -0.086 · z = 0.306

Equatorial (J2000)

RA 185.17878° · Dec 17.79325°

Galactic ℓ, b

264.138° · 78.281°

Ecliptic λ, β

177.418° · 18.334°

HTM-20 index

-2043213473

Observation Record

Photometric series

RV measurements

Archive notes