Key parameters at a glance

A radius of 2.83 Earth radii
A mass of 8.40 Earth masses
Surface gravity around 1.05 g
An orbital period of 6.020 days
Semi-major axis 0.0531 AU
Distance from Earth 38.92 light-years
Earth Similarity Index 0.660
Travel time at Voyager 1 speed 686,323 years
Almost certainly tidally locked to its host star given the close orbit

Gl 410 b Planet Profile

Physical Specs

Radius

2.83 R⊕

Radius (Jupiter)

0.253 R♃

Mass

8.40 M⊕

Mass (Jupiter)

0.026 M♃

Density

2.04 g/cm³

Surface Gravity

1.05 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.660

HZ Position Unknown

Controversial No

Discovery

Year 2025

Method Radial Velocity

Facility Mauna Kea Observatory

Telescope 3.58 m Canada-France-Hawaii Telescope (CFHT)

Size rank in cohort

Rank by radius

#703of 1978

top 35.5%

This planet

2.83R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

HD 3167 e 2.83 R⊕ GJ 3634 b 2.83 R⊕ Kepler-1099 b 2.83 R⊕

Metric	Earth	Gl 410 b	Jupiter
Radius (R⊕)	1.00	2.83	11.21
Mass (M⊕)	1.00	8.40	317.83
Density (g/cm³)	5.51	2.04	1.33
Surface Gravity (g)	1.00	1.05	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	8.400 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 95650

HIP

HIP 53985

TIC

TIC 97488127

Gaia DR2

Gaia DR2 3988689609004982912

Gaia DR3

Gaia DR3 3988689609004982912

System

Gl 410

Percentile among Sub-Neptune cohort

Radius 2.830 R⊕ · percentile 64 / cohort 1978

Mass 8.400 M⊕ · percentile 58 / cohort 1978

Orbital period 6.02 d · percentile 17 / cohort 1946

Distance 11.93 pc · percentile 2 / cohort 1975

ESI 0.660 · percentile 89 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

6.020 days

Semi-major axis

0.0531 AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 6.02 Earth days (1.6% of a terrestrial year) at a mean orbital distance of 0.0531 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.660

0 = alien, 1 = Earth-identical

Insufficient insolation data. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Carmona et al. 2025

Instrument

SPIRou

Publication

2025-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2025 at Mauna Kea Observatory (2 shown).

55 Cnc B b · Super-Earth 55 Cnc B c · Sub-Neptune

Host System: Gl 410

Spectral Class

K-type orange

Effective Temperature

3,842 K — cooler than the Sun (5,778 K)

Estimated Age

0.48 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.543 R☉

Stellar Mass

0.550 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

4.870 dex

Stellar density

4.498 g/cm³

Systemic radial velocity

-13.90 km/s

Rotation period

13.93 days

Metallicity ratio

[M/H]

Distance

11.93 parsec

Light-years 38.92 ly

V-band magnitude

9.57 mag

Voyager-speed travel 686,323 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

83.777 mas

Total Proper Motion

152.004 mas/yr

PM Right Ascension

142.85 mas/yr

PM Declination

-51.96 mas/yr

Galactic Cartesian (pc)

x = -0.899 · y = 0.230 · z = 0.374

Equatorial (J2000)

RA 165.66042° · Dec 21.96692°

Galactic ℓ, b

218.751° · 64.780°

Ecliptic λ, β

158.188° · 14.586°

HTM-20 index

964479311

Similar Worlds

Kepler-1359 b

Sub-Neptune · K-type orange

Radius 2.83 R⊕ · 2,005.4 ly

HD 3167 e

Sub-Neptune · K-type orange

Radius 2.83 R⊕ · 154.2 ly

Kepler-1665 b

Sub-Neptune · K-type orange

Radius 2.84 R⊕ · 1,094.3 ly

Kepler-599 b

Sub-Neptune · K-type orange

Radius 2.84 R⊕ · 1,821.6 ly

Kepler-1897 b

Sub-Neptune · K-type orange

Radius 2.81 R⊕ · 3,206.7 ly

Kepler-1996 c

Sub-Neptune · K-type orange

Radius 2.81 R⊕ · 1,436.9 ly

Explore Related Categories

Sub-Neptune Planets Radial Velocity Discoveries Mauna Kea Observatory Mission K-type orange Hosts