Key parameters at a glance

A radius of 1.39 Earth radii
A mass of 2.50 Earth masses
Surface gravity around 1.29 g
An orbital period of 2.305 days
Semi-major axis 0.0228 AU
Equilibrium temperature 587 K (314 °C)
Distance from Earth 52.21 light-years
Earth Similarity Index 0.524
Travel time at Voyager 1 speed 920,799 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around G 264-012

G 264-012 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 264-012 b this	Super-Earth	1.39	2.50	2.305	587	2021
G 264-012 c	Super-Earth	1.76	3.75	8.052	387	2021

G 264-012 b Planet Profile

Physical Specs

Radius

1.39 R⊕

Radius (Jupiter)

0.124 R♃

Mass

2.50 M⊕

Mass (Jupiter)

0.008 M♃

Density

5.12 g/cm³

Surface Gravity

1.29 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.524

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Radial Velocity

Facility Calar Alto Observatory

Telescope 3.5 m telescope

Size rank in cohort

Rank by radius

#940of 1176

top 79.8%

This planet

1.39R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-224 b 1.39 R⊕ Kepler-208 c 1.39 R⊕ TOI-1749 b 1.39 R⊕

Metric	Earth	G 264-012 b	Jupiter
Radius (R⊕)	1.00	1.39	11.21
Mass (M⊕)	1.00	2.50	317.83
Density (g/cm³)	5.51	5.12	1.33
Surface Gravity (g)	1.00	1.29	2.53
Insolation (S⊕)	1.00	20.50	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	2.500 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 322391844

Gaia DR2

Gaia DR2 2222540228723911168

Gaia DR3

Gaia DR3 2222540228723911168

System

G 264-012

Percentile among Super-Earth cohort

Radius 1.390 R⊕ · percentile 19 / cohort 1176

Mass 2.500 M⊕ · percentile 19 / cohort 1176

Orbital period 2.31 d · percentile 14 / cohort 1164

Distance 16.01 pc · percentile 3 / cohort 1171

ESI 0.524 · percentile 75 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

2.305 days

Semi-major axis

0.0228 AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 2.31 Earth days (0.6% of a terrestrial year) at a mean orbital distance of 0.0228 AU.

Eq. Temperature

587K

(314 °C)

Insolation (S⊕)

20.50

Earth = 1.00

Earth Similarity (ESI)

0.524

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

Amado et al. 2021

Instrument

CARMENES

Publication

2021-06

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at Calar Alto Observatory (2 shown).

G 264-012 c · Super-Earth GJ 486 b · Super-Earth

Host System: G 264-012

Spectral Class

M-type red dwarf

Effective Temperature

3,326 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.305 R☉

Stellar Mass

0.297 M☉

Metallicity [Fe/H]

0.10

Extended Stellar Properties

Surface gravity (log g)

4.850 dex

Stellar density

13.259 g/cm³

Rotational v·sin i

2.00 km/s

Rotation period

100.00 days

Metallicity ratio

[Fe/H]

Distance

16.01 parsec

Light-years 52.21 ly

V-band magnitude

13.08 mag

Voyager-speed travel 920,799 yr

Multi-band Host Photometry — 7 bands

Astrometric Data

Parallax

62.436 mas

Total Proper Motion

443.821 mas/yr

PM Right Ascension

392.71 mas/yr

PM Declination

206.78 mas/yr

Galactic Cartesian (pc)

x = 0.329 · y = -0.216 · z = 0.919

Equatorial (J2000)

RA 326.67196° · Dec 66.80385°

Galactic ℓ, b

106.148° · 10.162°

Ecliptic λ, β

26.911° · 68.341°

HTM-20 index

1995347981