Key parameters at a glance

A radius of 1.13 Earth radii
A mass of 1.52 Earth masses
Surface gravity around 1.19 g
An orbital period of 1.433 days
Semi-major axis 0.0128 AU
Equilibrium temperature 534 K (261 °C)
Earth Similarity Index 0.591
Almost certainly tidally locked to its host star given the close orbit

G 268-110 b Planet Profile

Physical Specs

Radius

1.13 R⊕

Radius (Jupiter)

0.101 R♃

Mass

1.52 M⊕

Mass (Jupiter)

0.005 M♃

Density

5.79 g/cm³

Surface Gravity

1.19 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.591

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

#180of 570

top 31.4%

This planet

1.13R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

TOI-1450 A c 1.13 R⊕ Kepler-250 b 1.13 R⊕ Kepler-887 c 1.13 R⊕

Metric	Earth	G 268-110 b	Jupiter
Radius (R⊕)	1.00	1.13	11.21
Mass (M⊕)	1.00	1.52	317.83
Density (g/cm³)	5.51	5.79	1.33
Surface Gravity (g)	1.00	1.19	2.53
Insolation (S⊕)	1.00	13.57	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1.520 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 471016687

Gaia DR2

Gaia DR2 2358022227591374336

Gaia DR3

Gaia DR3 2358022227591374336

System

G 268-110

Percentile among Rocky Terrestrial cohort

Radius 1.130 R⊕ · percentile 66 / cohort 570

Mass 1.520 M⊕ · percentile 63 / cohort 570

Orbital period 1.43 d · percentile 15 / cohort 567

ESI 0.591 · percentile 77 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

1.433 days

Semi-major axis

0.0128 AU

Eccentricity

0.000

Inclination

— °

Year Length

A year here lasts approximately 1.43 Earth days (0.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0128 AU.

Eq. Temperature

534K

(261 °C)

Insolation (S⊕)

13.57

Earth = 1.00

Earth Similarity (ESI)

0.591

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 192-15 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 268-110

Spectral Class

M-type red dwarf

Effective Temperature

—

Estimated Age

—

Stellar Radius

0.177 R☉

Stellar Mass

0.137 M☉

Metallicity [Fe/H]

—

Extended Stellar Properties

Surface gravity (log g)

5.086 dex

Stellar density

35.340 g/cm³

Rotation period

143.00 days