Key parameters at a glance

A radius of 1.24 Earth radii
A mass of 2.53 Earth masses
Surface gravity around 1.65 g
An orbital period of 0.573 days
Semi-major axis 0.0100 AU
Equilibrium temperature 996 K (723 °C)
Distance from Earth 93.06 light-years
Earth Similarity Index 0.299
Travel time at Voyager 1 speed 1,641,098 years
Almost certainly tidally locked to its host star given the close orbit

Wolf 327 b Planet Profile

Physical Specs

Radius

1.24 R⊕

Radius (Jupiter)

0.111 R♃

Mass

2.53 M⊕

Mass (Jupiter)

0.008 M♃

Density

7.24 g/cm³

Surface Gravity

1.65 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.299

HZ Position Inner

Controversial No

Discovery

Year 2024

Method Transit

Facility Transiting Exoplanet Survey Satellite (TESS)

Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#4of 570

top 0.5%

This planet

1.24R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-354 d 1.24 R⊕ Kepler-373 c 1.24 R⊕ Kepler-383 c 1.24 R⊕

Metric	Earth	Wolf 327 b	Jupiter
Radius (R⊕)	1.00	1.24	11.21
Mass (M⊕)	1.00	2.53	317.83
Density (g/cm³)	5.51	7.24	1.33
Surface Gravity (g)	1.00	1.65	2.53
Insolation (S⊕)	1.00	233.90	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	2.530 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 4918918

Gaia DR2

Gaia DR2 796185407950360192

Gaia DR3

Gaia DR3 796185407950360192

System

Wolf 327

Percentile among Rocky Terrestrial cohort

Radius 1.240 R⊕ · percentile 98 / cohort 570

Mass 2.530 M⊕ · percentile 93 / cohort 570

Orbital period 0.57 d · percentile 4 / cohort 567

Distance 28.53 pc · percentile 13 / cohort 566

ESI 0.299 · percentile 38 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

0.573 days

Semi-major axis

0.0100 AU

Eccentricity

0.000

Inclination

84.89 °

Year Length

A year here lasts roughly 13.8 hours long on a nearly circular orbit at a mean orbital distance of 0.0100 AU.

Transit Fingerprint

Depth

0.082 %

Duration

0.900 h

Impact parameter b

0.470

Rp / R★

0.028000

Transit midpoint (BJD)

2,459,252.9811

Photometric dip

Transit produces a flux drop of 818 ppm lasting ≈ 0.90 h.

Extended Orbital Architecture

Planet / star radius ratio

0.028000

Semi-major axis / stellar radius

5.300

Impact parameter (b)

0.470

RV semi-amplitude (K)

3.540 m/s

Transit mid-time (BJD)

2,459,252.9811

Angular separation (arcsec)

0.35000

Eq. Temperature

996K

(723 °C)

Insolation (S⊕)

233.90

Earth = 1.00

Earth Similarity (ESI)

0.299

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.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Murgas et al. 2024

Instrument

TESS CCD Array

Publication

2024-01

Observation locale

Space

Discovery cohort

Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

Gliese 12 b · Rocky Terrestrial TOI-6002 b · Super-Earth TOI-5713 b · Super-Earth TOI-4336 A b · Sub-Neptune TOI-406.01 · Sub-Neptune TOI-1224 c · Sub-Neptune LHS 1678 d · Rocky Terrestrial TOI-2088 b · Sub-Neptune TOI-2120 b · Sub-Neptune TOI-1806.01 · Sub-Neptune TOI-4633 c · Sub-Neptune TOI-260 b · Super-Earth

Host System: Wolf 327

Spectral Class

M-type red dwarf

Effective Temperature

3,542 K — cooler than the Sun (5,778 K)

Estimated Age

4.10 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.406 R☉

Stellar Mass

0.405 M☉

Metallicity [Fe/H]

-0.17

Extended Stellar Properties

Surface gravity (log g)

4.870 dex

Stellar density

8.540 g/cm³

Systemic radial velocity

9.39 km/s

Rotational v·sin i

2.00 km/s

Rotation period

44.40 days

Metallicity ratio

[Fe/H]

Distance

28.53 parsec

Light-years 93.06 ly

V-band magnitude

13.02 mag

Voyager-speed travel 1,641,098 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

35.020 mas

Total Proper Motion

197.798 mas/yr

PM Right Ascension

-87.85 mas/yr

PM Declination

-177.22 mas/yr

Galactic Cartesian (pc)

x = -0.693 · y = 0.426 · z = 0.582

Equatorial (J2000)

RA 148.37832° · Dec 35.57055°

Galactic ℓ, b

188.988° · 51.421°

Ecliptic λ, β

138.041° · 21.350°

HTM-20 index

-1864656821