Key parameters at a glance

A radius of 13.80 Earth radii
A mass of 321.01 Earth masses
Surface gravity around 1.69 g
An orbital period of 6.838 days
Semi-major axis 0.0770 AU
Distance from Earth 169.57 light-years
Earth Similarity Index 0.309
Travel time at Voyager 1 speed 2,990,438 years

HD 185269 b Planet Profile

Physical Specs

Radius

13.80 R⊕

Radius (Jupiter)

1.230 R♃

Mass

321.01 M⊕

Mass (Jupiter)

1.010 M♃

Density

0.67 g/cm³

Surface Gravity

1.69 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.309

HZ Position Unknown

Controversial No

Discovery

Year 2006

Method Radial Velocity

Facility Lick Observatory

Telescope 3.0 m C. Donald Shane Telescope

Size rank in cohort

Rank by radius

#510of 1771

top 28.7%

This planet

13.80R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

GJ 179 b 13.80 R⊕ GJ 832 b 13.80 R⊕ HD 219415 b 13.80 R⊕

Metric	Earth	HD 185269 b	Jupiter
Radius (R⊕)	1.00	13.80	11.21
Mass (M⊕)	1.00	321.01	317.83
Density (g/cm³)	5.51	0.67	1.33
Surface Gravity (g)	1.00	1.69	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	321.008 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 185269

HIP

HIP 96507

TIC

TIC 213721036

Gaia DR2

Gaia DR2 2031479093959232128

Gaia DR3

Gaia DR3 2031479093959232128

System

HD 185269

Percentile among Gas Giant cohort

Radius 13.800 R⊕ · percentile 70 / cohort 1771

Mass 321.008 M⊕ · percentile 35 / cohort 1747

Orbital period 6.84 d · percentile 41 / cohort 1533

Distance 51.99 pc · percentile 21 / cohort 1759

ESI 0.309 · percentile 61 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

6.838 days

Semi-major axis

0.0770 AU

Eccentricity

0.229

Inclination

— °

Year Length

A year here lasts approximately 6.84 Earth days (1.9% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0770 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.309

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Johnson et al. 2006

Instrument

Hamilton Echelle Spectrograph

Publication

2006-12

Observation locale

Ground

Host System: HD 185269

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,923 K — hotter than the Sun (5,778 K)

Estimated Age

4.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.000 R☉

Stellar Mass

1.300 M☉

Metallicity [Fe/H]

0.11

Extended Stellar Properties

Surface gravity (log g)

3.920 dex

Stellar density

0.162 g/cm³

Systemic radial velocity

0.62 km/s

Rotational v·sin i

6.10 km/s

Metallicity ratio

[Fe/H]

Distance

51.99 parsec

Light-years 169.57 ly

V-band magnitude

6.68 mag

Voyager-speed travel 2,990,438 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

19.205 mas

Total Proper Motion

86.706 mas/yr

PM Right Ascension

-31.50 mas/yr

PM Declination

-80.78 mas/yr

Galactic Cartesian (pc)

x = 0.362 · y = -0.801 · z = 0.477

Equatorial (J2000)

RA 294.29877° · Dec 28.49951°

Galactic ℓ, b

63.271° · 3.581°

Ecliptic λ, β

303.558° · 49.146°

HTM-20 index

-1753299485

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes