Key parameters at a glance

A radius of 10.90 Earth radii
A mass of 82.95 Earth masses
Surface gravity around 0.70 g
An orbital period of 10.899 days
Semi-major axis 0.1020 AU
Equilibrium temperature 890 K (617 °C)
Distance from Earth 126.94 light-years
Earth Similarity Index 0.145
Travel time at Voyager 1 speed 2,238,585 years

HD 108147 b Planet Profile

Physical Specs

Radius

10.90 R⊕

Radius (Jupiter)

0.973 R♃

Mass

82.95 M⊕

Mass (Jupiter)

0.261 M♃

Density

0.35 g/cm³

Surface Gravity

0.70 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.145

HZ Position Unknown

Controversial No

Discovery

Year 2002

Method Radial Velocity

Facility La Silla Observatory

Telescope 1.2 m Leonhard Euler Telescope

Size rank in cohort

Rank by radius

#1672of 1771

top 94.4%

This planet

10.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

XO-2 S b 10.90 R⊕ HD 16141 b 10.90 R⊕ OGLE-2018-BLG-0799L b 10.90 R⊕

Metric	Earth	HD 108147 b	Jupiter
Radius (R⊕)	1.00	10.90	11.21
Mass (M⊕)	1.00	82.95	317.83
Density (g/cm³)	5.51	0.35	1.33
Surface Gravity (g)	1.00	0.70	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	82.950 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 108147

HIP

HIP 60644

TIC

TIC 450491293

Gaia DR2

Gaia DR2 6053512007260865280

Gaia DR3

Gaia DR3 6053512007260865280

System

HD 108147

Percentile among Gas Giant cohort

Radius 10.900 R⊕ · percentile 5 / cohort 1771

Mass 82.950 M⊕ · percentile 3 / cohort 1747

Orbital period 10.90 d · percentile 45 / cohort 1533

Distance 38.92 pc · percentile 13 / cohort 1759

ESI 0.145 · percentile 36 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

10.899 days

Semi-major axis

0.1020 AU

Eccentricity

0.530

Inclination

— °

Year Length

A year here lasts approximately 10.90 Earth days (3.0% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.1020 AU.

Eq. Temperature

890K

(617 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.145

0 = alien, 1 = Earth-identical

Insufficient insolation data — the surface is too hot to retain surface water.

Discovery Paper

Primary reference

Pepe et al. 2002

Instrument

CORALIE Spectrograph

Publication

2002-06

Observation locale

Ground

Discovery cohort

Planets confirmed in 2002 at La Silla Observatory (4 shown).

HD 47536 b · Gas Giant HD 141937 b · Gas Giant HD 162020 b · Gas Giant HD 168746 b · Gas Giant

Host System: HD 108147

Spectral Class

F-type yellow-white

Effective Temperature

6,256 K — hotter than the Sun (5,778 K)

Estimated Age

3.20 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.207 R☉

Stellar Mass

1.220 M☉

Metallicity [Fe/H]

0.18

Extended Stellar Properties

Surface gravity (log g)

4.361 dex

Stellar density

0.979 g/cm³

Systemic radial velocity

5.03 km/s

Rotational v·sin i

5.30 km/s

Activity index (log R'HK)

-4.780

Metallicity ratio

[M/H]

Distance

38.92 parsec

Light-years 126.94 ly

V-band magnitude

6.99 mag

Voyager-speed travel 2,238,585 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

25.665 mas

Total Proper Motion

192.372 mas/yr

PM Right Ascension

-182.52 mas/yr

PM Declination

-60.78 mas/yr

Galactic Cartesian (pc)

x = -0.435 · y = -0.049 · z = -0.899

Equatorial (J2000)

RA 186.44099° · Dec -64.02235°

Galactic ℓ, b

300.125° · -1.291°

Ecliptic λ, β

222.769° · -53.633°

HTM-20 index

-1596495602

Observation Record

Photometric series

RV measurements

Archive notes