Key parameters at a glance

A radius of 2.79 Earth radii
A mass of 8.20 Earth masses
Surface gravity around 1.05 g
An orbital period of 11.949 days
Semi-major axis 0.0790 AU
Distance from Earth 54.20 light-years
Earth Similarity Index 0.665
Travel time at Voyager 1 speed 955,862 years
Almost certainly tidally locked to its host star given the close orbit

GJ 3082 b Planet Profile

Physical Specs

Radius

2.79 R⊕

Radius (Jupiter)

0.249 R♃

Mass

8.20 M⊕

Mass (Jupiter)

0.026 M♃

Density

2.07 g/cm³

Surface Gravity

1.05 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.665

HZ Position Unknown

Controversial No

Discovery

Year 2020

Method Radial Velocity

Facility Multiple Facilities

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#754of 1978

top 38.1%

This planet

2.79R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

AU Mic c 2.79 R⊕ Kepler-150 d 2.79 R⊕ Kepler-192 c 2.79 R⊕

Metric	Earth	GJ 3082 b	Jupiter
Radius (R⊕)	1.00	2.79	11.21
Mass (M⊕)	1.00	8.20	317.83
Density (g/cm³)	5.51	2.07	1.33
Surface Gravity (g)	1.00	1.05	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	8.200 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HIP

HIP 5812

TIC

TIC 206548902

Gaia DR2

Gaia DR2 4915139584039259392

Gaia DR3

Gaia DR3 4915139584039259392

System

GJ 3082

Percentile among Sub-Neptune cohort

Radius 2.790 R⊕ · percentile 61 / cohort 1978

Mass 8.200 M⊕ · percentile 56 / cohort 1978

Orbital period 11.95 d · percentile 41 / cohort 1946

Distance 16.62 pc · percentile 3 / cohort 1975

ESI 0.665 · percentile 89 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

11.949 days

Semi-major axis

0.0790 AU

Eccentricity

0.220

Inclination

— °

Year Length

A year here lasts approximately 11.95 Earth days (3.3% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0790 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.665

0 = alien, 1 = Earth-identical

Insufficient insolation data. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Feng et al. 2020

Instrument

Multiple Instruments

Publication

2020-01

Observation locale

Ground

Discovery cohort

Planets confirmed in 2020 at Multiple Facilities (2 shown).

GJ 433 d · Sub-Neptune GJ 180 d · Sub-Neptune

Host System: GJ 3082

Spectral Class

M-type red dwarf

Effective Temperature

3,910 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.465 R☉

Stellar Mass

0.470 M☉

Metallicity [Fe/H]

—

Extended Stellar Properties

Surface gravity (log g)

4.768 dex

Stellar density

6.478 g/cm³

Systemic radial velocity

6.33 km/s

Distance

16.62 parsec

Light-years 54.20 ly

V-band magnitude

11.04 mag

Voyager-speed travel 955,862 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

60.145 mas

Total Proper Motion

327.718 mas/yr

PM Right Ascension

103.37 mas/yr

PM Declination

310.99 mas/yr

Galactic Cartesian (pc)

x = 0.558 · y = 0.188 · z = -0.808

Equatorial (J2000)

RA 18.64324° · Dec -53.94078°

Galactic ℓ, b

295.463° · -62.851°

Ecliptic λ, β

345.046° · -54.741°

HTM-20 index

818907923