Key parameters at a glance

A radius of 4.67 Earth radii
A mass of 19.66 Earth masses
Surface gravity around 0.90 g
An orbital period of 73.940 days
Semi-major axis 0.2910 AU
Distance from Earth 38.92 light-years
Earth Similarity Index 0.497
Travel time at Voyager 1 speed 686,271 years

GJ 96 b Planet Profile

Physical Specs

Radius

4.67 R⊕

Radius (Jupiter)

0.417 R♃

Mass

19.66 M⊕

Mass (Jupiter)

0.062 M♃

Density

1.06 g/cm³

Surface Gravity

0.90 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.497

HZ Position Unknown

Controversial No

Discovery

Year 2018

Method Radial Velocity

Facility Haute-Provence Observatory

Telescope 1.93 m Telescope

Size rank in cohort

Rank by radius

#434of 574

top 75.4%

This planet

4.67R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

TOI-942 c 4.67 R⊕ K2-390 b 4.66 R⊕ Kepler-405 c 4.66 R⊕

Metric	Earth	GJ 96 b	Jupiter
Radius (R⊕)	1.00	4.67	11.21
Mass (M⊕)	1.00	19.66	317.83
Density (g/cm³)	5.51	1.06	1.33
Surface Gravity (g)	1.00	0.90	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	19.660 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HIP

HIP 11048

TIC

TIC 409527090

Gaia DR2

Gaia DR2 354077348697687424

Gaia DR3

Gaia DR3 354077348697687424

System

GJ 96

Percentile among Neptune-like cohort

Radius 4.670 R⊕ · percentile 24 / cohort 574

Mass 19.660 M⊕ · percentile 28 / cohort 574

Orbital period 73.94 d · percentile 76 / cohort 524

Distance 11.93 pc · percentile 3 / cohort 572

ESI 0.497 · percentile 90 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

73.940 days

Semi-major axis

0.2910 AU

Eccentricity

0.440

Inclination

— °

Year Length

A year here lasts approximately 73.94 Earth days (20.2% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.2910 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.497

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Hobson et al. 2018

Instrument

SOPHIE Spectrograph

Publication

2018-10

Observation locale

Ground

Host System: GJ 96

Spectral Class

M-type red dwarf

Effective Temperature

3,785 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.581 R☉

Stellar Mass

0.600 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.668 dex

Stellar density

4.120 g/cm³

Systemic radial velocity

-38.47 km/s

Rotation period

29.60 days

Metallicity ratio

[Fe/H]

Distance

11.93 parsec

Light-years 38.92 ly

V-band magnitude

9.40 mag

Voyager-speed travel 686,271 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

83.783 mas

Total Proper Motion

219.800 mas/yr

PM Right Ascension

215.93 mas/yr

PM Declination

41.09 mas/yr

Galactic Cartesian (pc)

x = 0.546 · y = 0.390 · z = 0.742

Equatorial (J2000)

RA 35.56240° · Dec 47.88021°

Galactic ℓ, b

138.293° · -12.265°

Ecliptic λ, β

50.114° · 31.694°

HTM-20 index

1991148540