Wolf 1069 · M5.0 V

Wolf 1069 b

Rank #4 of the ranked catalogue · Discovered by Radial Velocity in 2023

HZ 100%M sin i

0.839

Earth-2.0 index

rank #4

0.900

Earth Similarity Index

0.879–0.912 (68% CI)

100%

Conservative HZ probability

1.08 R⊕

Radius

mass: msini_lower_limit

At a glance

Wolf 1069 lies 31.26 light-years (9.583 pc) from the Sun. Wolf 1069 is a M5.0 V star with 0.167× the Sun's mass and 0.181× its radius (effective temperature 3158 K, versus the Sun's 5772 K). It is a single star hosting 1 known planet. Wolf 1069 b is 1.08× Earth's radius, at least 1.26× Earth's mass (a radial-velocity minimum mass, not the true mass), completing one orbit every 15.6 days at 0.0672 AU. It receives about 0.65× the flux Earth gets from the Sun, for an equilibrium temperature near 228 K (Earth's is 254 K).

Orbit and habitable-zone boundaries computed in Python from this system’s actual parameters. Sizes and the overall scale are compressed for visibility, not literal; green = conservative HZ, gold = optimistic HZ.

Planet parameters

Radius1.080 R⊕

Mass1.260 M⊕M sin iRadial-velocity minimum mass: the true mass is M/sin(i), so this is a LOWER limit.

Bulk density5.500 g/cm³source: catalogue

Escape velocity12.08 km/s

Orbital period15.5640 days

Semi-major axis0.06720 au

Eccentricity—

Incident flux0.652 S⊕source: catalogue

Equilibrium temperature228.4 KBond albedo assumed: 0.306. Equilibrium temperature excludes greenhouse warming by construction. Earth's is 254 K against a 288 K surface.

Host star

NameWolf 1069

Spectral typeM5.0 V

Effective temperature3158 K

Radius0.181 R☉

Mass0.167 M☉

Luminosity10^-2.531 L☉

Metallicity [Fe/H]0.070

Age—

Distance9.6 pc / 31.3 ly

Multiplicity1 star(s), 1 known planet(s)

Gaia DR3 cross-check

Parallax distance9.57 pc0.09% vs. archive-adopted distance

RUWE1.419RUWE > 1.4 is the conventional flag for a poorly-fit or unresolved-binary single-star astrometric solution.

Habitable zone

Boundary modelKopparapu et al. (2013), ApJ 765, 131, with the 2013 erratum coefficients

Boundary	S_eff (Earth units)
recent venus	1.5050
runaway greenhouse	0.8672
moist greenhouse	0.8596
maximum greenhouse	0.2356
early mars	0.2094

Atmospheric spectroscopy

No published transmission spectrum exists for this planet in the NASA Exoplanet Archive.

Transit analysis

Planet is not flagged as transiting; a light curve cannot show a transit.

Radial-velocity analysis

Not requested for this build.

Measurement sources

Parameter	Value	Source
Planet radius	1.0800	archive-calculated (not a publication)
Planet mass	1.2600	Kossakowski et al. 2023
Orbital period	15.5640	Kossakowski et al. 2023
Semi-major axis	0.0672	Kossakowski et al. 2023
Incident flux	0.6520	Kossakowski et al. 2023
Equilibrium temperature	250.1000	Kossakowski et al. 2023
Bulk density	5.5000	archive-calculated (not a publication)
Stellar effective temperature	3158.0000	Kossakowski et al. 2023
Stellar radius	0.1813	Kossakowski et al. 2023
Stellar mass	0.1670	Kossakowski et al. 2023
Stellar luminosity	-2.5311	Kossakowski et al. 2023
Stellar metallicity	0.0700	Kossakowski et al. 2023
System distance	9.5834	TICv8

Component scores

Earth similarity

0.900

Conservative habitability

0.931

Observational confidence

0.644

Characterisation potential

—

Evidence

Independent references: 1
Published parameter sets: 1
Composite parameter sources: 3 · mixed
Default-solution coverage: 82%
Composite ↔ default difference: 0% median
Uncertainty coverage: 83%
Discovery method: Radial Velocity
Discovery year: 2023

Observability

TSM: n/a (non-transiting)
RV semi-amplitude (expected): 1.064 m/s
Transit-time σ at 2030: —
Max angular separation: 7.01 mas
Reflected-light contrast: 4.48e-8

Identifiers

system_name: Wolf 1069

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Any rendering of this world is a scientifically informed visualisation, not an image. No exoplanet has been imaged at surface resolution. Surface and cloud appearance are illustrative of a physically plausible class, not observations.