Key parameters at a glance

A radius of 2.33 Earth radii
A mass of 6.03 Earth masses
Surface gravity around 1.11 g
An orbital period of 34.369 days
Distance from Earth 30.70 light-years
Earth Similarity Index 0.729
Travel time at Voyager 1 speed 541,392 years
Almost certainly tidally locked to its host star given the close orbit

2 siblings around GJ 367

GJ 367 d shares its host star with 2 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
GJ 367 b	Rocky Terrestrial	0.70	0.63	0.322	1,365	2021
GJ 367 c	Super-Earth	1.86	4.13	11.530	—	2023
GJ 367 d this	Sub-Neptune	2.33	6.03	34.369	—	2023

GJ 367 d Planet Profile

Physical Specs

Radius

2.33 R⊕

Radius (Jupiter)

0.208 R♃

Mass

6.03 M⊕

Mass (Jupiter)

0.019 M♃

Density

2.62 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.729

HZ Position Unknown

Controversial No

Discovery

Year 2023

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#1451of 1978

top 73.3%

This planet

2.33R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1983 b 2.33 R⊕ Kepler-241 b 2.33 R⊕ Kepler-1021 b 2.33 R⊕

Metric	Earth	GJ 367 d	Jupiter
Radius (R⊕)	1.00	2.33	11.21
Mass (M⊕)	1.00	6.03	317.83
Density (g/cm³)	5.51	2.62	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	6.030 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HIP

HIP 47780

TIC

TIC 34068865

Gaia DR2

Gaia DR2 5412250540681250560

Gaia DR3

Gaia DR3 5412250540681250560

System

GJ 367

Percentile among Sub-Neptune cohort

Radius 2.330 R⊕ · percentile 26 / cohort 1978

Mass 6.030 M⊕ · percentile 25 / cohort 1978

Orbital period 34.37 d · percentile 77 / cohort 1946

Distance 9.41 pc · percentile 1 / cohort 1975

ESI 0.729 · percentile 95 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

34.369 days

Semi-major axis

— AU

Eccentricity

0.140

Inclination

— °

Year Length

A year here lasts approximately 34.37 Earth days (9.4% of a terrestrial year) on a mildly elliptical path.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.729

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Goffo et al. 2023

Instrument

HARPS Spectrograph

Publication

2023-07

Observation locale

Ground

Discovery cohort

Planets confirmed in 2023 at La Silla Observatory (12 shown).

GJ 367 c · Super-Earth TOI-544 c · Neptune-like HD 74698 b · Neptune-like HD 75302 b · Gas Giant BD-210397 c · Gas Giant HD 108202 b · Gas Giant HIP 54597 b · Gas Giant HD 135625 b · Gas Giant HD 185283 b · Gas Giant HD 73256 c · Gas Giant BD-210397 b · Gas Giant HD 94771 b · Gas Giant

Host System: GJ 367

Spectral Class

M-type red dwarf

Effective Temperature

3,522 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.458 R☉

Stellar Mass

0.455 M☉

Metallicity [Fe/H]

-0.01

Extended Stellar Properties

Surface gravity (log g)

4.776 dex

Stellar density

6.697 g/cm³

Systemic radial velocity

47.92 km/s

Rotation period

51.30 days

Activity index (log R'HK)

-5.169

Metallicity ratio

[Fe/H]

Distance

9.41 parsec

Light-years 30.70 ly

V-band magnitude

10.15 mag

Voyager-speed travel 541,392 yr

Multi-band Host Photometry — 8 bands

Astrometric Data

Parallax

106.211 mas

Total Proper Motion

744.059 mas/yr

PM Right Ascension

-462.55 mas/yr

PM Declination

-582.81 mas/yr

Galactic Cartesian (pc)

x = -0.579 · y = 0.389 · z = -0.717

Equatorial (J2000)

RA 146.12146° · Dec -45.77902°

Galactic ℓ, b

272.243° · 5.659°

Ecliptic λ, β

172.945° · -54.308°

HTM-20 index

-908434844