Key parameters at a glance

A radius of 13.80 Earth radii
A mass of 298.75 Earth masses
Surface gravity around 1.57 g
An orbital period of 989.200 days
Semi-major axis 2.0150 AU
Distance from Earth 56.54 light-years
Earth Similarity Index 0.304
Travel time at Voyager 1 speed 997,108 years

HD 10647 b Planet Profile

Physical Specs

Radius

13.80 R⊕

Radius (Jupiter)

1.230 R♃

Mass

298.75 M⊕

Mass (Jupiter)

0.940 M♃

Density

0.63 g/cm³

Surface Gravity

1.57 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.304

HZ Position Unknown

Controversial No

Discovery

Year 2006

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I 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 10647 b	Jupiter
Radius (R⊕)	1.00	13.80	11.21
Mass (M⊕)	1.00	298.75	317.83
Density (g/cm³)	5.51	0.63	1.33
Surface Gravity (g)	1.00	1.57	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	298.750 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 10647

HIP

HIP 7978

TIC

TIC 229137615

Gaia DR2

Gaia DR2 4912580642524184960

Gaia DR3

Gaia DR3 4912580642524184960

System

HD 10647

Percentile among Gas Giant cohort

Radius 13.800 R⊕ · percentile 70 / cohort 1771

Mass 298.750 M⊕ · percentile 33 / cohort 1747

Orbital period 989.20 d · percentile 77 / cohort 1533

Distance 17.34 pc · percentile 3 / cohort 1759

ESI 0.304 · percentile 59 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

989.200 days

Semi-major axis

2.0150 AU

Eccentricity

0.150

Inclination

— °

Year Length

A year here lasts about 2.71 Earth years on a mildly elliptical path at a mean orbital distance of 2.0150 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

18.100 m/s

Transit mid-time (BJD)

2,452,357.0000

Long. of periastron (ω)

212.00°

Angular separation (arcsec)

116.00000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.304

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Butler et al. 2006

Instrument

HIRES Spectrometer

Publication

2006-07

Observation locale

Ground

Discovery cohort

Planets confirmed in 2006 at W. M. Keck Observatory (7 shown).

HD 24040 b · Gas Giant HD 86081 b · Gas Giant HIP 14810 c · Gas Giant HD 154345 b · Gas Giant GJ 849 b · Gas Giant HD 224693 b · Gas Giant HD 33283 b · Gas Giant

Host System: HD 10647

Spectral Class

F-type yellow-white

Effective Temperature

6,218 K — hotter than the Sun (5,778 K)

Estimated Age

1.40 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.100 R☉

Stellar Mass

1.110 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.620 dex

Stellar density

1.252 g/cm³

Systemic radial velocity

27.68 km/s

Rotational v·sin i

4.90 km/s

Metallicity ratio

[Fe/H]

Distance

17.34 parsec

Light-years 56.54 ly

V-band magnitude

5.52 mag

Voyager-speed travel 997,108 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

57.656 mas

Total Proper Motion

196.554 mas/yr

PM Right Ascension

165.83 mas/yr

PM Declination

-105.52 mas/yr

Galactic Cartesian (pc)

x = 0.533 · y = 0.256 · z = -0.806

Equatorial (J2000)

RA 25.62335° · Dec -53.74129°

Galactic ℓ, b

286.896° · -61.769°

Ecliptic λ, β

350.826° · -57.305°

HTM-20 index

-784118621

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes