Key parameters at a glance

A radius of 2.03 Earth radii
A mass of 4.77 Earth masses
Surface gravity around 1.16 g
An orbital period of 2.381 days
Semi-major axis 0.0340 AU
Distance from Earth 120.93 light-years
Earth Similarity Index 0.780
Travel time at Voyager 1 speed 2,132,684 years

1 sibling around GJ 2030

GJ 2030 b 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 2030 b this	Sub-Neptune	2.03	4.77	2.381	—	2022
GJ 2030 c	Gas Giant	12.30	4,069.16	25,533.114	—	2022

GJ 2030 b Planet Profile

Physical Specs

Radius

2.03 R⊕

Radius (Jupiter)

0.181 R♃

Mass

4.77 M⊕

Mass (Jupiter)

0.015 M♃

Density

3.13 g/cm³

Surface Gravity

1.16 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.780

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1915of 1978

top 96.8%

This planet

2.03R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-117 b 2.03 R⊕ Kepler-37 d 2.03 R⊕ Kepler-195 b 2.03 R⊕

Metric	Earth	GJ 2030 b	Jupiter
Radius (R⊕)	1.00	2.03	11.21
Mass (M⊕)	1.00	4.77	317.83
Density (g/cm³)	5.51	3.13	1.33
Surface Gravity (g)	1.00	1.16	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	4.767 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 9967949

Gaia DR2

Gaia DR2 5168359139139252352

Gaia DR3

Gaia DR3 5168359139139252352

System

GJ 2030

Percentile among Sub-Neptune cohort

Radius 2.030 R⊕ · percentile 3 / cohort 1978

Mass 4.767 M⊕ · percentile 5 / cohort 1978

Orbital period 2.38 d · percentile 3 / cohort 1946

Distance 37.08 pc · percentile 9 / cohort 1975

ESI 0.780 · percentile 99 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

2.381 days

Semi-major axis

0.0340 AU

Eccentricity

0.239

Inclination

— °

Year Length

A year here lasts approximately 2.38 Earth days (0.7% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0340 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.780

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Feng et al. 2022

Instrument

Multiple Instruments

Publication

2022-09

Observation locale

Ground

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 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 GJ 514 b · Sub-Neptune HD 12235 b · Sub-Neptune HD 18143 b · Sub-Neptune

Host System: GJ 2030

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,485 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

2.241 R☉

Stellar Mass

0.960 M☉

Metallicity [Fe/H]

-0.40

Extended Stellar Properties

Surface gravity (log g)

3.719 dex

Stellar density

0.120 g/cm³

Metallicity ratio

[M/H]

Distance

37.08 parsec

Light-years 120.93 ly

V-band magnitude

6.21 mag

Voyager-speed travel 2,132,684 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

26.941 mas

Total Proper Motion

219.542 mas/yr

PM Right Ascension

1.76 mas/yr

PM Declination

-219.54 mas/yr

Galactic Cartesian (pc)

x = 0.626 · y = 0.768 · z = -0.136

Equatorial (J2000)

RA 50.82376° · Dec -7.79504°

Galactic ℓ, b

191.809° · -49.202°

Ecliptic λ, β

46.111° · -25.464°

HTM-20 index

-1687022969