Key parameters at a glance

A radius of 12.80 Earth radii
A mass of 1,661.61 Earth masses
Surface gravity around 10.14 g
An orbital period of 7,841.584 days
Semi-major axis 8.4150 AU
Distance from Earth 157.37 light-years
Earth Similarity Index 0.433
Travel time at Voyager 1 speed 2,775,167 years

1 sibling around HD 156098

HD 156098 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 156098 b	Neptune-like	4.12	15.89	21.858	—	2022
HD 156098 c this	Gas Giant	12.80	1,661.61	7,841.584	—	2022

HD 156098 c Planet Profile

Physical Specs

Radius

12.80 R⊕

Radius (Jupiter)

1.140 R♃

Mass

1,661.61 M⊕

Mass (Jupiter)

5.228 M♃

Density

4.35 g/cm³

Surface Gravity

10.14 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.433

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1063of 1771

top 60.0%

This planet

12.80R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 240210 b 12.80 R⊕ HD 29985 b 12.80 R⊕ HD 148164 c 12.80 R⊕

Metric	Earth	HD 156098 c	Jupiter
Radius (R⊕)	1.00	12.80	11.21
Mass (M⊕)	1.00	1,661.61	317.83
Density (g/cm³)	5.51	4.35	1.33
Surface Gravity (g)	1.00	10.14	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,661.607 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 156098

TIC

TIC 152449405

Gaia DR2

Gaia DR2 5979460655025099776

Gaia DR3

Gaia DR3 5979460655025099776

System

HD 156098

Percentile among Gas Giant cohort

Radius 12.800 R⊕ · percentile 37 / cohort 1771

Mass 1,661.607 M⊕ · percentile 76 / cohort 1747

Orbital period 7,841.58 d · percentile 95 / cohort 1533

Distance 48.25 pc · percentile 18 / cohort 1759

ESI 0.433 · percentile 95 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

7,841.584 days

Semi-major axis

8.4150 AU

Eccentricity

0.391

Inclination

23.46 °

Year Length

A year here lasts about 21.47 Earth years on a highly eccentric trajectory at a mean orbital distance of 8.4150 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.433

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 156098

Spectral Class

F-type yellow-white

Effective Temperature

6,419 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

2.757 R☉

Stellar Mass

1.290 M☉

Metallicity [Fe/H]

0.12

Extended Stellar Properties

Surface gravity (log g)

3.668 dex

Stellar density

0.087 g/cm³

Metallicity ratio

[M/H]

Distance

48.25 parsec

Light-years 157.37 ly

V-band magnitude

5.53 mag

Voyager-speed travel 2,775,167 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

20.699 mas

Total Proper Motion

112.596 mas/yr

PM Right Ascension

-98.27 mas/yr

PM Declination

-54.96 mas/yr

Galactic Cartesian (pc)

x = -0.157 · y = -0.827 · z = -0.540

Equatorial (J2000)

RA 259.26469° · Dec -32.66308°

Galactic ℓ, b

353.520° · 3.084°

Ecliptic λ, β

260.846° · -9.564°

HTM-20 index

1402592621