Key parameters at a glance

A radius of 13.40 Earth radii
A mass of 630.89 Earth masses
Surface gravity around 3.51 g
An orbital period of 1,176.450 days
Semi-major axis 2.2310 AU
Distance from Earth 177.67 light-years
Earth Similarity Index 0.365
Travel time at Voyager 1 speed 3,133,203 years

HD 190647 b Planet Profile

Physical Specs

Radius

13.40 R⊕

Radius (Jupiter)

1.190 R♃

Mass

630.89 M⊕

Mass (Jupiter)

1.985 M♃

Density

1.44 g/cm³

Surface Gravity

3.51 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.365

HZ Position Unknown

Controversial No

Discovery

Year 2007

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#730of 1771

top 41.2%

This planet

13.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 114783 c 13.40 R⊕ HIP 79431 b 13.40 R⊕ HD 68988 b 13.40 R⊕

Metric	Earth	HD 190647 b	Jupiter
Radius (R⊕)	1.00	13.40	11.21
Mass (M⊕)	1.00	630.89	317.83
Density (g/cm³)	5.51	1.44	1.33
Surface Gravity (g)	1.00	3.51	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	630.893 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 190647

HIP

HIP 99115

TIC

TIC 48777312

Gaia DR2

Gaia DR2 6697758334244808192

Gaia DR3

Gaia DR3 6697758334244808192

System

HD 190647

Percentile among Gas Giant cohort

Radius 13.400 R⊕ · percentile 56 / cohort 1771

Mass 630.893 M⊕ · percentile 55 / cohort 1747

Orbital period 1,176.45 d · percentile 79 / cohort 1533

Distance 54.47 pc · percentile 22 / cohort 1759

ESI 0.365 · percentile 75 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,176.450 days

Semi-major axis

2.2310 AU

Eccentricity

0.224

Inclination

— °

Year Length

A year here lasts about 3.22 Earth years on a mildly elliptical path at a mean orbital distance of 2.2310 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.365

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Naef et al. 2007

Instrument

HARPS Spectrograph

Publication

2007-08

Observation locale

Ground

Discovery cohort

Planets confirmed in 2007 at La Silla Observatory (10 shown).

GJ 581 c · Sub-Neptune GJ 674 b · Sub-Neptune HD 219828 b · Neptune-like HD 70573 b · Gas Giant HD 221287 b · Gas Giant HD 171028 b · Gas Giant BD-13 2130 b · Gas Giant HD 156846 b · Gas Giant HD 4113 b · Gas Giant HD 100777 b · Gas Giant

Host System: HD 190647

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,656 K — cooler than the Sun (5,778 K)

Estimated Age

7.96 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.376 R☉

Stellar Mass

1.069 M☉

Metallicity [Fe/H]

0.23

Extended Stellar Properties

Surface gravity (log g)

4.162 dex

Stellar density

0.418 g/cm³

Systemic radial velocity

-40.33 km/s

Rotational v·sin i

1.83 km/s

Rotation period

42.00 days

Activity index (log R'HK)

-5.070

Metallicity ratio

[Fe/H]

Distance

54.47 parsec

Light-years 177.67 ly

V-band magnitude

7.78 mag

Voyager-speed travel 3,133,203 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

18.329 mas

Total Proper Motion

208.565 mas/yr

PM Right Ascension

-26.62 mas/yr

PM Declination

-206.86 mas/yr

Galactic Cartesian (pc)

x = 0.429 · y = -0.691 · z = -0.581

Equatorial (J2000)

RA 301.83182° · Dec -35.53952°

Galactic ℓ, b

5.660° · -30.033°

Ecliptic λ, β

296.372° · -14.969°

HTM-20 index

-1871655500