Key parameters at a glance

A mass of 3,531.07 Earth masses
An orbital period of 9.674 days
Semi-major axis 0.0800 AU
Distance from Earth 91.97 light-years
Travel time at Voyager 1 speed 1,621,933 years
Almost certainly tidally locked to its host star given the close orbit

HD 125595 b Planet Profile

Physical Specs

Radius

— R⊕

Radius (Jupiter)

— R♃

Mass

3,531.07 M⊕

Mass (Jupiter)

11.110 M♃

Density

— g/cm³

Surface Gravity

— g (Earth)

Classification

Planet Type

Unclassified

ESI Score —

HZ Position Unknown

Controversial No

Discovery

Year 2009

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Metric	Earth	HD 125595 b	Jupiter
Radius (R⊕)	1.00	—	11.21
Mass (M⊕)	1.00	3,531.07	317.83
Density (g/cm³)	5.51	—	1.33
Surface Gravity (g)	1.00	—	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	3,531.074 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	6.357 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 125595

HIP

HIP 70170

TIC

TIC 180030300

Gaia DR2

Gaia DR2 6104435819513399168

Gaia DR3

Gaia DR3 6104435819513399168

System

HD 125595

Percentile among Unclassified cohort

Mass 3,531.074 M⊕ · percentile 88 / cohort 42

Orbital period 9.67 d · percentile 33 / cohort 43

Distance 28.20 pc · percentile 44 / cohort 43

Orbit & Habitability

Orbital Dynamics

Period

9.674 days

Semi-major axis

0.0800 AU

Eccentricity

0.000

Inclination

0.22 °

Year Length

A year here lasts approximately 9.67 Earth days (2.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0800 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

—

0 = alien, 1 = Earth-identical

Insufficient insolation data. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Segransan et al. 2011

Instrument

HARPS Spectrograph

Publication

2011-11

Observation locale

Ground

Discovery cohort

Planets confirmed in 2009 at La Silla Observatory (12 shown).

GJ 581 e · Super-Earth HD 125612 c · Neptune-like HD 90156 b · Neptune-like HD 147018 c · Gas Giant HD 103197 b · Neptune-like HD 125612 d · Gas Giant HIP 70849 b · Gas Giant HD 85390 b · Neptune-like HD 190984 b · Gas Giant HD 171238 b · Gas Giant HD 290327 b · Gas Giant HD 147018 b · Gas Giant

Host System: HD 125595

Spectral Class

K-type orange

Effective Temperature

4,691 K — cooler than the Sun (5,778 K)

Estimated Age

3.53 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.740 R☉

Stellar Mass

0.290 M☉

Metallicity [Fe/H]

0.08

Extended Stellar Properties

Surface gravity (log g)

4.170 dex

Stellar density

2.517 g/cm³

Systemic radial velocity

4.48 km/s

Rotational v·sin i

1.50 km/s

Rotation period

40.10 days

Metallicity ratio

[Fe/H]

Distance

28.20 parsec

Light-years 91.97 ly

V-band magnitude

9.03 mag

Voyager-speed travel 1,621,933 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

35.434 mas

Total Proper Motion

565.800 mas/yr

PM Right Ascension

-561.64 mas/yr

PM Declination

-68.52 mas/yr

Galactic Cartesian (pc)

x = -0.621 · y = -0.441 · z = -0.648

Equatorial (J2000)

RA 215.34343° · Dec -40.39424°

Galactic ℓ, b

320.909° · 19.317°

Ecliptic λ, β

226.815° · -24.792°

HTM-20 index

260260227

Similar Worlds

BD-08 2823 b

Unclassified · K-type orange

Radius — R⊕ · 134.8 ly

HD 181433 b

Unclassified · K-type orange

Radius — R⊕ · 87.7 ly

HD 215152 c

Unclassified · K-type orange

Radius — R⊕ · 70.4 ly

BD+05 4868 A b

Unclassified · K-type orange

Radius — R⊕ · 142.1 ly

WASP-53 c

Unclassified · K-type orange

Radius — R⊕ · 656.7 ly

HD 40307 c

Unclassified · K-type orange

Radius — R⊕ · 42.2 ly

Explore Related Categories

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