Key parameters at a glance

A radius of 2.89 Earth radii
A mass of 8.70 Earth masses
Surface gravity around 1.04 g
An orbital period of 57.320 days
Semi-major axis 0.1760 AU
Distance from Earth 16.33 light-years
Earth Similarity Index 0.653
Travel time at Voyager 1 speed 287,974 years

1 sibling around GJ 682

GJ 682 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
GJ 682 b	Super-Earth	1.93	4.40	17.478	—	2014
GJ 682 c this	Sub-Neptune	2.89	8.70	57.320	—	2014

GJ 682 c Planet Profile

Physical Specs

Radius

2.89 R⊕

Radius (Jupiter)

0.258 R♃

Mass

8.70 M⊕

Mass (Jupiter)

0.027 M♃

Density

1.98 g/cm³

Surface Gravity

1.04 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.653

HZ Position Unknown

Controversial No

Discovery

Year 2014

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#640of 1978

top 32.3%

This planet

2.89R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-781 b 2.89 R⊕ Kepler-689 b 2.89 R⊕ Kepler-53 b 2.89 R⊕

Metric	Earth	GJ 682 c	Jupiter
Radius (R⊕)	1.00	2.89	11.21
Mass (M⊕)	1.00	8.70	317.83
Density (g/cm³)	5.51	1.98	1.33
Surface Gravity (g)	1.00	1.04	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	8.700 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HIP

HIP 86214

TIC

TIC 16909043

Gaia DR2

Gaia DR2 5955305209191546112

Gaia DR3

Gaia DR3 5955305209191546112

System

GJ 682

Percentile among Sub-Neptune cohort

Radius 2.890 R⊕ · percentile 67 / cohort 1978

Mass 8.700 M⊕ · percentile 61 / cohort 1978

Orbital period 57.32 d · percentile 88 / cohort 1946

Distance 5.01 pc · percentile 0 / cohort 1975

ESI 0.653 · percentile 88 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

57.320 days

Semi-major axis

0.1760 AU

Eccentricity

0.100

Inclination

— °

Year Length

A year here lasts approximately 57.32 Earth days (15.7% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1760 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.653

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Tuomi et al. 2014

Instrument

Multiple Instruments

Publication

2014-06

Observation locale

Ground

Discovery cohort

Planets confirmed in 2014 at Multiple Observatories (12 shown).

GJ 682 b · Super-Earth GJ 180 c · Sub-Neptune GJ 180 b · Sub-Neptune GJ 160.2 b · Sub-Neptune GJ 422 b · Sub-Neptune GJ 27.1 b · Sub-Neptune GJ 433 c · Neptune-like HIP 105854 b · Gas Giant TYC 1422-614-1 c · Gas Giant TYC 1422-614-1 b · Gas Giant HD 141399 c · Gas Giant HD 141399 d · Gas Giant

Host System: GJ 682

Spectral Class

M-type red dwarf

Effective Temperature

3,028 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.298 R☉

Stellar Mass

0.270 M☉

Metallicity [Fe/H]

—

Distance

5.01 parsec

Light-years 16.33 ly

V-band magnitude

10.94 mag

Voyager-speed travel 287,974 yr

Multi-band Host Photometry — 8 bands

Astrometric Data

Parallax

199.703 mas

Total Proper Motion

1,174.002 mas/yr

PM Right Ascension

-706.12 mas/yr

PM Declination

-937.91 mas/yr

Galactic Cartesian (pc)

x = -0.072 · y = -0.712 · z = -0.699

Equatorial (J2000)

RA 264.26102° · Dec -44.32325°

Galactic ℓ, b

345.981° · -6.634°

Ecliptic λ, β

265.602° · -20.971°

HTM-20 index

-151231137