Key parameters at a glance

A radius of 1.08 Earth radii
A mass of 1.26 Earth masses
Surface gravity around 1.08 g
An orbital period of 15.564 days
Semi-major axis 0.0672 AU
Equilibrium temperature 250 K (-23 °C)
Distance from Earth 31.26 light-years
Earth Similarity Index 0.892
Travel time at Voyager 1 speed 551,215 years
Almost certainly tidally locked to its host star given the close orbit

Context from the literature

Wolf 1069 b is an Earth-sized planet orbiting the red dwarf star Wolf 1069. Being located in the habitable zone of its star, Wolf 1069 b is considered a potentially habitable planet, as well as one of the closest Earth-mass planets orbiting in the habitable zone. The minimum mass of the planet, as measured by the radial velocity method, is 1.26 M🜨, while its radius is estimated at 1.08 R🜨. The equilibrium temperature of Wolf 1069 b is −23 °C (250 K).

Excerpted from Wikipedia · full article

Wolf 1069 b Planet Profile

Physical Specs

Radius

1.08 R⊕

Radius (Jupiter)

0.096 R♃

Mass

1.26 M⊕

Mass (Jupiter)

0.004 M♃

Density

5.50 g/cm³

Surface Gravity

1.08 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.892

HZ Position Habitable

Controversial No

Discovery

Year 2023

Method Radial Velocity

Facility Calar Alto Observatory

Telescope 3.5 m telescope

Size rank in cohort

Rank by radius

#253of 570

top 44.2%

This planet

1.08R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

K2-72 b 1.08 R⊕ Kepler-1605 b 1.08 R⊕ TOI-6255 b 1.08 R⊕

Metric	Earth	Wolf 1069 b	Jupiter
Radius (R⊕)	1.00	1.08	11.21
Mass (M⊕)	1.00	1.26	317.83
Density (g/cm³)	5.51	5.50	1.33
Surface Gravity (g)	1.00	1.08	2.53
Insolation (S⊕)	1.00	0.65	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1.260 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 352617553

Gaia DR2

Gaia DR2 2188318517720321664

Gaia DR3

Gaia DR3 2188318517720321664

System

Wolf 1069

Percentile among Rocky Terrestrial cohort

Radius 1.080 R⊕ · percentile 55 / cohort 570

Mass 1.260 M⊕ · percentile 49 / cohort 570

Orbital period 15.56 d · percentile 88 / cohort 567

Distance 9.58 pc · percentile 5 / cohort 566

ESI 0.892 · percentile 90 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

15.564 days

Semi-major axis

0.0672 AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 15.56 Earth days (4.3% of a terrestrial year) at a mean orbital distance of 0.0672 AU.

Eq. Temperature

250K

(-23 °C)

Insolation (S⊕)

0.65

Earth = 1.00

Earth Similarity (ESI)

0.892

0 = alien, 1 = Earth-identical

Within the conservative habitable zone — surface water would be frozen. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Kossakowski et al. 2023

Instrument

CARMENES

Publication

2023-02

Observation locale

Ground

Discovery cohort

Planets confirmed in 2023 at Calar Alto Observatory (3 shown).

GJ 3988 b · Super-Earth HN Lib b · Sub-Neptune GJ 724 b · Sub-Neptune

Host System: Wolf 1069

Spectral Class

M-type red dwarf

Effective Temperature

3,158 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.181 R☉

Stellar Mass

0.167 M☉

Metallicity [Fe/H]

0.07

Extended Stellar Properties

Surface gravity (log g)

4.930 dex

Stellar density

30.995 g/cm³

Systemic radial velocity

-60.05 km/s

Rotational v·sin i

2.00 km/s

Rotation period

160.00 days

Metallicity ratio

[Fe/H]

Distance

9.58 parsec

Light-years 31.26 ly

V-band magnitude

13.99 mag

Voyager-speed travel 551,215 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

104.318 mas

Total Proper Motion

602.496 mas/yr

PM Right Ascension

261.08 mas/yr

PM Declination

542.99 mas/yr

Galactic Cartesian (pc)

x = 0.310 · y = -0.419 · z = 0.853

Equatorial (J2000)

RA 306.52425° · Dec 58.57530°

Galactic ℓ, b

93.744° · 11.704°

Ecliptic λ, β

351.749° · 71.727°

HTM-20 index

-2110111600

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