Key parameters at a glance

A radius of 13.60 Earth radii
A mass of 413.18 Earth masses
Surface gravity around 2.23 g
An orbital period of 4,060.000 days
Semi-major axis 4.6000 AU
Distance from Earth 102.40 light-years
Earth Similarity Index 0.331
Travel time at Voyager 1 speed 1,805,765 years

HD 185283 b Planet Profile

Physical Specs

Radius

13.60 R⊕

Radius (Jupiter)

1.220 R♃

Mass

413.18 M⊕

Mass (Jupiter)

1.300 M♃

Density

0.90 g/cm³

Surface Gravity

2.23 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.331

HZ Position Unknown

Controversial No

Discovery

Year 2023

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#609of 1771

top 34.3%

This planet

13.60R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 19994 b 13.60 R⊕ HD 205739 b 13.60 R⊕ HD 79498 b 13.60 R⊕

Metric	Earth	HD 185283 b	Jupiter
Radius (R⊕)	1.00	13.60	11.21
Mass (M⊕)	1.00	413.18	317.83
Density (g/cm³)	5.51	0.90	1.33
Surface Gravity (g)	1.00	2.23	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	413.177 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 185283

HIP

HIP 96861

TIC

TIC 320264344

Gaia DR2

Gaia DR2 6640676436470581888

Gaia DR3

Gaia DR3 6640676436470581888

System

HD 185283

Percentile among Gas Giant cohort

Radius 13.600 R⊕ · percentile 63 / cohort 1771

Mass 413.177 M⊕ · percentile 43 / cohort 1747

Orbital period 4,060.00 d · percentile 91 / cohort 1533

Distance 31.40 pc · percentile 8 / cohort 1759

ESI 0.331 · percentile 65 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4,060.000 days

Semi-major axis

4.6000 AU

Eccentricity

0.070

Inclination

91.00 °

Year Length

A year here lasts about 11.12 Earth years on a nearly circular orbit at a mean orbital distance of 4.6000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.331

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Philipot et al. 2023

Instrument

HARPS Spectrograph

Publication

2023-08

Observation locale

Ground

Discovery cohort

Planets confirmed in 2023 at La Silla Observatory (12 shown).

GJ 367 c · Super-Earth GJ 367 d · Sub-Neptune TOI-544 c · Neptune-like HD 74698 b · Neptune-like HD 75302 b · Gas Giant BD-210397 c · Gas Giant HD 108202 b · Gas Giant HIP 54597 b · Gas Giant HD 135625 b · Gas Giant HD 73256 c · Gas Giant BD-210397 b · Gas Giant HD 94771 b · Gas Giant

Host System: HD 185283

Spectral Class

K-type orange

Effective Temperature

4,848 K — cooler than the Sun (5,778 K)

Estimated Age

6.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.743 R☉

Stellar Mass

0.800 M☉

Metallicity [Fe/H]

-0.06

Extended Stellar Properties

Surface gravity (log g)

4.593 dex

Stellar density

2.712 g/cm³

Rotational v·sin i

0.90 km/s

Activity index (log R'HK)

-4.940

Metallicity ratio

[M/H]

Distance

31.40 parsec

Light-years 102.40 ly

V-band magnitude

9.03 mag

Voyager-speed travel 1,805,765 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

31.823 mas

Total Proper Motion

172.378 mas/yr

PM Right Ascension

-163.83 mas/yr

PM Declination

-53.62 mas/yr

Galactic Cartesian (pc)

x = 0.237 · y = -0.501 · z = -0.832

Equatorial (J2000)

RA 295.32336° · Dec -56.32211°

Galactic ℓ, b

341.214° · -29.076°

Ecliptic λ, β

286.690° · -34.341°

HTM-20 index

1514895156

Similar Worlds

HS Psc b

Gas Giant · K-type orange

Radius 13.60 R⊕ · 122.8 ly

HD 331093 b

Gas Giant · K-type orange

Radius 13.60 R⊕ · 163.7 ly

HD 167042 b

Gas Giant · K-type orange

Radius 13.60 R⊕ · 162.0 ly

HD 10442 b

Gas Giant · K-type orange

Radius 13.60 R⊕ · 441.5 ly

HD 83443 c

Gas Giant · K-type orange

Radius 13.60 R⊕ · 133.4 ly

HD 141399 c

Gas Giant · K-type orange

Radius 13.60 R⊕ · 120.7 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries La Silla Observatory Mission K-type orange Hosts