Key parameters at a glance

A radius of 12.40 Earth radii
A mass of 3,561.90 Earth masses
Surface gravity around 23.17 g
An orbital period of 13,092.183 days
Semi-major axis 11.1160 AU
Distance from Earth 261.69 light-years
Earth Similarity Index 0.367
Travel time at Voyager 1 speed 4,614,919 years

HD 194490 b Planet Profile

Physical Specs

Radius

12.40 R⊕

Radius (Jupiter)

1.110 R♃

Mass

3,561.90 M⊕

Mass (Jupiter)

11.207 M♃

Density

10.30 g/cm³

Surface Gravity

23.17 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.367

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1298of 1771

top 73.2%

This planet

12.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 110014 b 12.40 R⊕ CFBDSIR J145829+101343 b 12.40 R⊕ MOA-2010-BLG-073L b 12.40 R⊕

Metric	Earth	HD 194490 b	Jupiter
Radius (R⊕)	1.00	12.40	11.21
Mass (M⊕)	1.00	3,561.90	317.83
Density (g/cm³)	5.51	10.30	1.33
Surface Gravity (g)	1.00	23.17	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	3,561.903 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 194490

TIC

TIC 100272295

Gaia DR2

Gaia DR2 6475212134196589952

Gaia DR3

Gaia DR3 6475212134196589952

System

HD 194490

Percentile among Gas Giant cohort

Radius 12.400 R⊕ · percentile 25 / cohort 1771

Mass 3,561.903 M⊕ · percentile 90 / cohort 1747

Orbital period 13,092.18 d · percentile 96 / cohort 1533

Distance 80.23 pc · percentile 31 / cohort 1759

ESI 0.367 · percentile 76 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

13,092.183 days

Semi-major axis

11.1160 AU

Eccentricity

0.251

Inclination

57.99 °

Year Length

A year here lasts about 35.84 Earth years on a mildly elliptical path at a mean orbital distance of 11.1160 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.367

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 194490

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,861 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.149 R☉

Stellar Mass

1.060 M☉

Metallicity [Fe/H]

0.08

Extended Stellar Properties

Surface gravity (log g)

4.343 dex

Stellar density

0.985 g/cm³

Metallicity ratio

[M/H]

Distance

80.23 parsec

Light-years 261.69 ly

V-band magnitude

8.99 mag

Voyager-speed travel 4,614,919 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

12.435 mas

Total Proper Motion

142.911 mas/yr

PM Right Ascension

-142.80 mas/yr

PM Declination

-5.62 mas/yr

Galactic Cartesian (pc)

x = 0.373 · y = -0.495 · z = -0.784

Equatorial (J2000)

RA 306.99801° · Dec -51.66446°

Galactic ℓ, b

347.113° · -35.691°

Ecliptic λ, β

295.961° · -31.508°

HTM-20 index

-817173249