Key parameters at a glance

A radius of 2.13 Earth radii
A mass of 5.20 Earth masses
Surface gravity around 1.15 g
An orbital period of 140.430 days
Semi-major axis 0.4220 AU
Equilibrium temperature 202 K (-71 °C)
Distance from Earth 24.85 light-years
Earth Similarity Index 0.624
Travel time at Voyager 1 speed 438,156 years

GJ 514 b Planet Profile

Physical Specs

Radius

2.13 R⊕

Radius (Jupiter)

0.190 R♃

Mass

5.20 M⊕

Mass (Jupiter)

0.016 M♃

Density

2.96 g/cm³

Surface Gravity

1.15 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.624

HZ Position Outer

Controversial No

Discovery

Year 2022

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1765of 1978

top 89.2%

This planet

2.13R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-200 b 2.13 R⊕ Kepler-214 c 2.13 R⊕ HD 40307 f 2.13 R⊕

Metric	Earth	GJ 514 b	Jupiter
Radius (R⊕)	1.00	2.13	11.21
Mass (M⊕)	1.00	5.20	317.83
Density (g/cm³)	5.51	2.96	1.33
Surface Gravity (g)	1.00	1.15	2.53
Insolation (S⊕)	1.00	0.28	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	5.200 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HIP

HIP 65859

TIC

TIC 404519959

Gaia DR2

Gaia DR2 3738099879558957952

Gaia DR3

Gaia DR3 3738099879558957952

System

GJ 514

Percentile among Sub-Neptune cohort

Radius 2.130 R⊕ · percentile 10 / cohort 1978

Mass 5.200 M⊕ · percentile 12 / cohort 1978

Orbital period 140.43 d · percentile 96 / cohort 1946

Distance 7.62 pc · percentile 1 / cohort 1975

ESI 0.624 · percentile 85 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

140.430 days

Semi-major axis

0.4220 AU

Eccentricity

0.450

Inclination

— °

Year Length

A year here lasts approximately 140.43 Earth days (38.4% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.4220 AU.

Eq. Temperature

202K

(-71 °C)

Insolation (S⊕)

0.28

Earth = 1.00

Earth Similarity (ESI)

0.624

0 = alien, 1 = Earth-identical

Beyond the outer HZ boundary (too cold) — surface water would be frozen.

Discovery Paper

Primary reference

Damasso et al. 2022

Instrument

Multiple Instruments

Publication

2022-04

Observation locale

Multiple Locales

Discovery cohort

Planets confirmed in 2022 at Multiple Observatories (12 shown).

Kepler-138 e · Rocky Terrestrial HD 93351 b · Super-Earth GJ 1002 b · Rocky Terrestrial GJ 2030 b · Sub-Neptune GJ 3929 c · Sub-Neptune HD 217786 c · Sub-Neptune GJ 1002 c · Rocky Terrestrial HD 155918 b · Sub-Neptune HD 213519 b · Sub-Neptune HD 191939 g · Sub-Neptune HD 12235 b · Sub-Neptune HD 18143 b · Sub-Neptune

Host System: GJ 514

Spectral Class

M-type red dwarf

Effective Temperature

3,728 K — cooler than the Sun (5,778 K)

Estimated Age

0.80 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.500 R☉

Stellar Mass

0.510 M☉

Metallicity [Fe/H]

-0.14

Extended Stellar Properties

Surface gravity (log g)

4.760 dex

Stellar density

5.556 g/cm³

Systemic radial velocity

14.60 km/s

Rotation period

28.00 days

Activity index (log R'HK)

-5.100

Metallicity ratio

[Fe/H]

Distance

7.62 parsec

Light-years 24.85 ly

V-band magnitude

9.05 mag

Voyager-speed travel 438,156 yr

Multi-band Host Photometry — 13 bands

Astrometric Data

Parallax

131.243 mas

Total Proper Motion

1,557.080 mas/yr

PM Right Ascension

1,127.51 mas/yr

PM Declination

-1,073.88 mas/yr

Galactic Cartesian (pc)

x = -0.909 · y = -0.376 · z = 0.180

Equatorial (J2000)

RA 202.50404° · Dec 10.37254°

Galactic ℓ, b

333.238° · 70.939°

Ecliptic λ, β

196.764° · 18.358°

HTM-20 index

-254284857