Key parameters at a glance

A radius of 3.76 Earth radii
A mass of 13.60 Earth masses
Surface gravity around 0.96 g
An orbital period of 2,946.000 days
Semi-major axis 2.9400 AU
Distance from Earth 18.51 light-years
Earth Similarity Index 0.565
Travel time at Voyager 1 speed 326,457 years

1 sibling around GJ 411

HD 95735 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
GJ 411 b	Super-Earth	1.45	2.69	12.939	350	2019
HD 95735 c this	Sub-Neptune	3.76	13.60	2,946.000	—	2021

HD 95735 c Planet Profile

Physical Specs

Radius

3.76 R⊕

Radius (Jupiter)

0.335 R♃

Mass

13.60 M⊕

Mass (Jupiter)

0.043 M♃

Density

1.41 g/cm³

Surface Gravity

0.96 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.565

HZ Position Unknown

Controversial No

Discovery

Year 2021

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#68of 1978

top 3.4%

This planet

3.76R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

KMT-2023-BLG-1431L b 3.76 R⊕ TOI-620 b 3.76 R⊕ Kepler-160 c 3.76 R⊕

Metric	Earth	HD 95735 c	Jupiter
Radius (R⊕)	1.00	3.76	11.21
Mass (M⊕)	1.00	13.60	317.83
Density (g/cm³)	5.51	1.41	1.33
Surface Gravity (g)	1.00	0.96	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	13.600 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 95735

HIP

HIP 54035

TIC

TIC 166646191

System

GJ 411

Percentile among Sub-Neptune cohort

Radius 3.760 R⊕ · percentile 96 / cohort 1978

Mass 13.600 M⊕ · percentile 89 / cohort 1978

Orbital period 2,946.00 d · percentile 100 / cohort 1946

Distance 5.68 pc · percentile 0 / cohort 1975

ESI 0.565 · percentile 78 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

2,946.000 days

Semi-major axis

2.9400 AU

Eccentricity

0.132

Inclination

— °

Year Length

A year here lasts about 8.07 Earth years on a mildly elliptical path at a mean orbital distance of 2.9400 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

1.160 m/s

Transit mid-time (BJD)

2,457,205.0000

Long. of periastron (ω)

63.00°

Angular separation (arcsec)

518.00000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.565

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Rosenthal et al. 2021

Instrument

Multiple Instruments

Publication

2021-07

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at Multiple Observatories (12 shown).

L 98-59 e · Super-Earth GJ 393 b · Rocky Terrestrial HD 168009 b · Sub-Neptune HD 164922 e · Sub-Neptune HD 141004 b · Sub-Neptune HD 107148 c · Neptune-like TOI-178 f · Sub-Neptune TYC 0434-04538-1 b · Gas Giant HIP 56640 b · Gas Giant HD 137496 c · Gas Giant HD 156668 c · Neptune-like HD 145675 c · Gas Giant

Host System: GJ 411

Spectral Class

M-type red dwarf

Effective Temperature

3,719 K — cooler than the Sun (5,778 K)

Estimated Age

8.05 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.369 R☉

Stellar Mass

0.390 M☉

Metallicity [Fe/H]

-0.36

Extended Stellar Properties

Surface gravity (log g)

4.895 dex

Stellar density

9.601 g/cm³

Systemic radial velocity

-84.65 km/s

Rotational v·sin i

2.00 km/s

Rotation period

56.16 days

Activity index (log R'HK)

-5.470

Metallicity ratio

[Fe/H]

Distance

5.68 parsec

Light-years 18.51 ly

V-band magnitude

7.49 mag

Voyager-speed travel 326,457 yr

Multi-band Host Photometry — 6 bands

Astrometric Data

Parallax

392.400 mas

Total Proper Motion

4,802.155 mas/yr

PM Right Ascension

-580.00 mas/yr

PM Declination

-4,767.00 mas/yr

Galactic Cartesian (pc)

x = -0.785 · y = 0.198 · z = 0.587

Equatorial (J2000)

RA 165.83447° · Dec 35.97232°

Galactic ℓ, b

185.113° · 65.431°

Ecliptic λ, β

152.102° · 27.396°

HTM-20 index

100861203

Observation Record

Photometric series

Stellar spectra

Archive notes