Key parameters at a glance

A radius of 11.90 Earth radii
A mass of 8,419.59 Earth masses
Surface gravity around 59.46 g
An orbital period of 77,114.072 days
Semi-major axis 35.7310 AU
Distance from Earth 228.58 light-years
Earth Similarity Index 0.257
Travel time at Voyager 1 speed 4,031,047 years

1 sibling around HD 105618

HD 105618 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
HD 105618 b	Neptune-like	5.44	25.43	10.022	—	2022
HD 105618 c this	Gas Giant	11.90	8,419.59	77,114.072	—	2022

HD 105618 c Planet Profile

Physical Specs

Radius

11.90 R⊕

Radius (Jupiter)

1.070 R♃

Mass

8,419.59 M⊕

Mass (Jupiter)

26.491 M♃

Density

27.50 g/cm³

Surface Gravity

59.46 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.257

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1526of 1771

top 86.1%

This planet

11.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

2MASS J22501512+2325342 b 11.90 R⊕ KMT-2020-BLG-0414L c 11.90 R⊕ DENIS-P J082303.1-491201 b 11.90 R⊕

Metric	Earth	HD 105618 c	Jupiter
Radius (R⊕)	1.00	11.90	11.21
Mass (M⊕)	1.00	8,419.59	317.83
Density (g/cm³)	5.51	27.50	1.33
Surface Gravity (g)	1.00	59.46	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	8,419.592 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 105618

TIC

TIC 397519199

Gaia DR2

Gaia DR2 3906803888551408000

Gaia DR3

Gaia DR3 3906803888551408000

System

HD 105618

Percentile among Gas Giant cohort

Radius 11.900 R⊕ · percentile 13 / cohort 1771

Mass 8,419.592 M⊕ · percentile 99 / cohort 1747

Orbital period 77,114.07 d · percentile 99 / cohort 1533

Distance 70.08 pc · percentile 28 / cohort 1759

ESI 0.257 · percentile 47 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

77,114.072 days

Semi-major axis

35.7310 AU

Eccentricity

0.126

Inclination

31.97 °

Year Length

A year here lasts about 211.13 Earth years on a mildly elliptical path at a mean orbital distance of 35.7310 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.257

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Feng et al. 2022

Instrument

Multiple Instruments

Publication

2022-09

Observation locale

Ground

Discovery cohort

Planets confirmed in 2022 at Multiple Observatories (12 shown).

Kepler-138 e · Rocky Terrestrial HD 93351 b · Super-Earth GJ 1002 b · Rocky Terrestrial GJ 2030 b · Sub-Neptune GJ 3929 c · Sub-Neptune HD 217786 c · Sub-Neptune GJ 1002 c · Rocky Terrestrial HD 155918 b · Sub-Neptune HD 213519 b · Sub-Neptune HD 191939 g · Sub-Neptune GJ 514 b · Sub-Neptune HD 12235 b · Sub-Neptune

Host System: HD 105618

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,671 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.274 R☉

Stellar Mass

1.010 M☉

Metallicity [Fe/H]

—

Distance

70.08 parsec

Light-years 228.58 ly

V-band magnitude

8.63 mag

Voyager-speed travel 4,031,047 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

14.240 mas

Total Proper Motion

104.631 mas/yr

PM Right Ascension

-104.61 mas/yr

PM Declination

-1.96 mas/yr

Galactic Cartesian (pc)

x = -0.980 · y = -0.041 · z = 0.194

Equatorial (J2000)

RA 182.40213° · Dec 11.21157°

Galactic ℓ, b

269.217° · 71.291°

Ecliptic λ, β

177.681° · 11.230°

HTM-20 index

569010175