Key parameters at a glance

A radius of 1.02 Earth radii
A mass of 1.03 Earth masses
Surface gravity around 0.99 g
An orbital period of 2.275 days
Semi-major axis 0.0172 AU
Equilibrium temperature 454 K (180 °C)
Distance from Earth 31.09 light-years
Earth Similarity Index 0.698
Travel time at Voyager 1 speed 548,208 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around G 192-15

G 192-15 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
G 192-15 b this	Rocky Terrestrial	1.02	1.03	2.275	454	2025
G 192-15 c	Sub-Neptune	3.87	14.30	1,219.000	56	2025

G 192-15 b Planet Profile

Physical Specs

Radius

1.02 R⊕

Radius (Jupiter)

0.091 R♃

Mass

1.03 M⊕

Mass (Jupiter)

0.003 M♃

Density

5.33 g/cm³

Surface Gravity

0.99 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.698

HZ Position Inner

Controversial No

Discovery

Year 2025

Method Radial Velocity

Facility Calar Alto Observatory

Telescope 3.5 m telescope

Size rank in cohort

Rank by radius

#311of 570

top 54.4%

This planet

1.02R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-336 b 1.02 R⊕ Kepler-130 b 1.02 R⊕ Proxima Cen b 1.02 R⊕

Metric	Earth	G 192-15 b	Jupiter
Radius (R⊕)	1.00	1.02	11.21
Mass (M⊕)	1.00	1.03	317.83
Density (g/cm³)	5.51	5.33	1.33
Surface Gravity (g)	1.00	0.99	2.53
Insolation (S⊕)	1.00	7.06	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1.030 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 467119250

Gaia DR2

Gaia DR2 970354749937140736

Gaia DR3

Gaia DR3 970354749937140736

System

G 192-15

Percentile among Rocky Terrestrial cohort

Radius 1.020 R⊕ · percentile 44 / cohort 570

Mass 1.030 M⊕ · percentile 39 / cohort 570

Orbital period 2.27 d · percentile 25 / cohort 567

Distance 9.53 pc · percentile 5 / cohort 566

ESI 0.698 · percentile 82 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

2.275 days

Semi-major axis

0.0172 AU

Eccentricity

0.000

Inclination

— °

Year Length

A year here lasts approximately 2.27 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0172 AU.

Eq. Temperature

454K

(180 °C)

Insolation (S⊕)

7.06

Earth = 1.00

Earth Similarity (ESI)

0.698

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Kaminski et al. 2025

Instrument

CARMENES

Publication

2025-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2025 at Calar Alto Observatory (8 shown).

G 261-6 b · Rocky Terrestrial G 268-110 b · Rocky Terrestrial KOBE-1 c · Sub-Neptune TOI-2093 b · Sub-Neptune KOBE-1 b · Sub-Neptune GJ 9773 b · Gas Giant G 192-15 c · Sub-Neptune GJ 508.2 b · Unclassified

Host System: G 192-15

Spectral Class

M-type red dwarf

Effective Temperature

2,999 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.171 R☉

Stellar Mass

0.132 M☉

Metallicity [Fe/H]

—

Extended Stellar Properties

Surface gravity (log g)

5.123 dex

Stellar density

39.962 g/cm³

Rotation period

105.00 days

Distance

9.53 parsec

Light-years 31.09 ly

V-band magnitude

14.64 mag

Voyager-speed travel 548,208 yr

Multi-band Host Photometry — 6 bands

Astrometric Data

Parallax

104.890 mas

Total Proper Motion

852.719 mas/yr

PM Right Ascension

67.22 mas/yr

PM Declination

-850.07 mas/yr

Galactic Cartesian (pc)

x = -0.007 · y = 0.645 · z = 0.764

Equatorial (J2000)

RA 90.62209° · Dec 49.86194°

Galactic ℓ, b

163.238° · 13.120°

Ecliptic λ, β

90.444° · 26.424°

HTM-20 index

-1891385821