Key parameters at a glance

A mass of 3,375.34 Earth masses
An orbital period of 604.670 days
Semi-major axis 1.4270 AU
Distance from Earth 127.07 light-years
Travel time at Voyager 1 speed 2,240,926 years

5 siblings around HD 10180

HD 10180 g shares its host star with 5 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
HD 10180 c	Unclassified	—	2,741.59	5.760	—	2010
HD 10180 d	Unclassified	—	3,295.88	16.357	—	2010
HD 10180 e	Neptune-like	5.39	25.10	49.748	—	2010
HD 10180 f	Neptune-like	5.24	23.90	122.744	—	2010
HD 10180 g this	Unclassified	—	3,375.34	604.670	—	2010
HD 10180 h	Neptune-like	9.40	64.40	2,205.000	—	2010

HD 10180 g Planet Profile

Physical Specs

Radius

— R⊕

Radius (Jupiter)

— R♃

Mass

3,375.34 M⊕

Mass (Jupiter)

10.620 M♃

Density

— g/cm³

Surface Gravity

— g (Earth)

Classification

Planet Type

Unclassified

ESI Score —

HZ Position Unknown

Controversial No

Discovery

Year 2010

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Metric	Earth	HD 10180 g	Jupiter
Radius (R⊕)	1.00	—	11.21
Mass (M⊕)	1.00	3,375.34	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	3,375.338 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	23.265 M⊕	Lower bound from radial-velocity fitting.
Computed mass	21.400 M⊕	Model-computed mass (e.g. from mass-radius relation).

Star Catalogue Identifiers

HD 10180

HIP

HIP 7599

TIC

TIC 231836962

Gaia DR2

Gaia DR2 4716158250340258944

Gaia DR3

Gaia DR3 4716158250340258944

System

HD 10180

Percentile among Unclassified cohort

Mass 3,375.338 M⊕ · percentile 83 / cohort 42

Orbital period 604.67 d · percentile 67 / cohort 43

Distance 38.96 pc · percentile 53 / cohort 43

Orbit & Habitability

Orbital Dynamics

Period

604.670 days

Semi-major axis

1.4270 AU

Eccentricity

0.263

Inclination

90.00 °

Year Length

A year here lasts about 1.66 Earth years on a mildly elliptical path at a mean orbital distance of 1.4270 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

—

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Lovis et al. 2011

Instrument

HARPS Spectrograph

Publication

2011-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2010 at La Silla Observatory (12 shown).

GJ 3634 b · Sub-Neptune HD 10180 f · Neptune-like HD 10180 e · Neptune-like GJ 676 A b · Gas Giant HD 204313 b · Gas Giant HD 28254 b · Gas Giant HD 1690 b · Gas Giant HD 10180 h · Neptune-like HD 113538 c · Gas Giant HD 25171 b · Gas Giant HD 8535 b · Gas Giant HD 44219 b · Gas Giant

Host System: HD 10180

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,911 K — hotter than the Sun (5,778 K)

Estimated Age

4.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.109 R☉

Stellar Mass

1.060 M☉

Metallicity [Fe/H]

0.08

Extended Stellar Properties

Surface gravity (log g)

4.390 dex

Stellar density

0.922 g/cm³

Systemic radial velocity

35.53 km/s

Rotational v·sin i

3.00 km/s

Activity index (log R'HK)

-5.040

Metallicity ratio

[Fe/H]

Distance

38.96 parsec

Light-years 127.07 ly

V-band magnitude

7.33 mag

Voyager-speed travel 2,240,926 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

25.638 mas

Total Proper Motion

16.588 mas/yr

PM Right Ascension

-14.38 mas/yr

PM Declination

8.27 mas/yr

Galactic Cartesian (pc)

x = 0.448 · y = 0.204 · z = -0.870

Equatorial (J2000)

RA 24.47311° · Dec -60.51149°

Galactic ℓ, b

292.805° · -55.694°

Ecliptic λ, β

340.440° · -61.611°

HTM-20 index

327679115