Key parameters at a glance

A radius of 4.16 Earth radii
A mass of 16.14 Earth masses
Surface gravity around 0.93 g
An orbital period of 40.000 days
Semi-major axis 0.2300 AU
Distance from Earth 92.15 light-years
Earth Similarity Index 0.532
Travel time at Voyager 1 speed 1,625,102 years

Context from the literature

HD 164595 b is a confirmed exoplanet orbiting around a Sun-like star HD 164595 every 40 days some 94.36 light-years away. It was detected with the radial velocity technique with the SOPHIE echelle spectrograph. The planet has a minimal mass equivalent of 16 Earths.

Excerpted from Wikipedia · full article

HD 164595 b Planet Profile

Physical Specs

Radius

4.16 R⊕

Radius (Jupiter)

0.371 R♃

Mass

16.14 M⊕

Mass (Jupiter)

0.051 M♃

Density

1.23 g/cm³

Surface Gravity

0.93 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.532

HZ Position Unknown

Controversial No

Discovery

Year 2015

Method Radial Velocity

Facility Haute-Provence Observatory

Telescope 1.93 m Telescope

Size rank in cohort

Rank by radius

#529of 574

top 92.0%

This planet

4.16R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-421 b 4.16 R⊕ Kepler-315 c 4.15 R⊕ Kepler-1993 b 4.15 R⊕

Metric	Earth	HD 164595 b	Jupiter
Radius (R⊕)	1.00	4.16	11.21
Mass (M⊕)	1.00	16.14	317.83
Density (g/cm³)	5.51	1.23	1.33
Surface Gravity (g)	1.00	0.93	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	16.140 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 164595

HIP

HIP 88194

TIC

TIC 158917706

Gaia DR2

Gaia DR2 4584639307993378432

Gaia DR3

Gaia DR3 4584639307993378432

System

HD 164595

Percentile among Neptune-like cohort

Radius 4.160 R⊕ · percentile 8 / cohort 574

Mass 16.140 M⊕ · percentile 13 / cohort 574

Orbital period 40.00 d · percentile 66 / cohort 524

Distance 28.25 pc · percentile 9 / cohort 572

ESI 0.532 · percentile 97 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

40.000 days

Semi-major axis

0.2300 AU

Eccentricity

0.088

Inclination

— °

Year Length

A year here lasts approximately 40.00 Earth days (11.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2300 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.532

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Courcol et al. 2015

Instrument

SOPHIE Spectrograph

Publication

2015-09

Observation locale

Ground

Host System: HD 164595

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,790 K — hotter than the Sun (5,778 K)

Estimated Age

7.12 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.024 R☉

Stellar Mass

0.990 M☉

Metallicity [Fe/H]

-0.04

Extended Stellar Properties

Surface gravity (log g)

4.440 dex

Stellar density

1.341 g/cm³

Systemic radial velocity

2.07 km/s

Rotational v·sin i

2.10 km/s

Activity index (log R'HK)

-5.000

Metallicity ratio

[Fe/H]

Distance

28.25 parsec

Light-years 92.15 ly

V-band magnitude

7.09 mag

Voyager-speed travel 1,625,102 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

35.364 mas

Total Proper Motion

222.375 mas/yr

PM Right Ascension

-139.13 mas/yr

PM Declination

173.48 mas/yr

Galactic Cartesian (pc)

x = 0.002 · y = -0.870 · z = 0.494

Equatorial (J2000)

RA 270.16137° · Dec 29.57267°

Galactic ℓ, b

55.467° · 23.278°

Ecliptic λ, β

270.229° · 53.012°

HTM-20 index

1679640704

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