Key parameters at a glance

A radius of 1.76 Earth radii
A mass of 3.75 Earth masses
Surface gravity around 1.21 g
An orbital period of 8.052 days
Semi-major axis 0.0525 AU
Equilibrium temperature 387 K (114 °C)
Distance from Earth 52.21 light-years
Earth Similarity Index 0.699
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 c 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	Super-Earth	1.39	2.50	2.305	587	2021
G 264-012 c this	Super-Earth	1.76	3.75	8.052	387	2021

G 264-012 c Planet Profile

Physical Specs

Radius

1.76 R⊕

Radius (Jupiter)

0.157 R♃

Mass

3.75 M⊕

Mass (Jupiter)

0.012 M♃

Density

3.78 g/cm³

Surface Gravity

1.21 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.699

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

#315of 1176

top 26.7%

This planet

1.76R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-916 b 1.76 R⊕ Kepler-888 b 1.76 R⊕ Kepler-755 b 1.76 R⊕

Metric	Earth	G 264-012 c	Jupiter
Radius (R⊕)	1.00	1.76	11.21
Mass (M⊕)	1.00	3.75	317.83
Density (g/cm³)	5.51	3.78	1.33
Surface Gravity (g)	1.00	1.21	2.53
Insolation (S⊕)	1.00	3.87	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	3.750 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 1.760 R⊕ · percentile 73 / cohort 1176

Mass 3.750 M⊕ · percentile 66 / cohort 1176

Orbital period 8.05 d · percentile 57 / cohort 1164

Distance 16.01 pc · percentile 3 / cohort 1171

ESI 0.699 · percentile 85 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

8.052 days

Semi-major axis

0.0525 AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 8.05 Earth days (2.2% of a terrestrial year) at a mean orbital distance of 0.0525 AU.

Eq. Temperature

387K

(114 °C)

Insolation (S⊕)

3.87

Earth = 1.00

Earth Similarity (ESI)

0.699

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 b · 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