Key parameters at a glance

A radius of 1.86 Earth radii
A mass of 4.13 Earth masses
Surface gravity around 1.19 g
An orbital period of 11.530 days
Distance from Earth 30.70 light-years
Earth Similarity Index 0.813
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 c 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 this	Super-Earth	1.86	4.13	11.530	—	2023
GJ 367 d	Sub-Neptune	2.33	6.03	34.369	—	2023

GJ 367 c Planet Profile

Physical Specs

Radius

1.86 R⊕

Radius (Jupiter)

0.166 R♃

Mass

4.13 M⊕

Mass (Jupiter)

0.013 M♃

Density

3.53 g/cm³

Surface Gravity

1.19 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.813

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

#177of 1176

top 15.0%

This planet

1.86R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-299 d 1.86 R⊕ Kepler-191 c 1.86 R⊕ Kepler-265 b 1.86 R⊕

Metric	Earth	GJ 367 c	Jupiter
Radius (R⊕)	1.00	1.86	11.21
Mass (M⊕)	1.00	4.13	317.83
Density (g/cm³)	5.51	3.53	1.33
Surface Gravity (g)	1.00	1.19	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	4.130 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 Super-Earth cohort

Radius 1.860 R⊕ · percentile 84 / cohort 1176

Mass 4.130 M⊕ · percentile 78 / cohort 1176

Orbital period 11.53 d · percentile 69 / cohort 1164

Distance 9.41 pc · percentile 2 / cohort 1171

ESI 0.813 · percentile 90 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

11.530 days

Semi-major axis

— AU

Eccentricity

0.090

Inclination

— °

Year Length

A year here lasts approximately 11.53 Earth days (3.2% of a terrestrial year) on a nearly circular orbit.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.813

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 d · Sub-Neptune 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