Key parameters at a glance

A radius of 13.00 Earth radii
A mass of 1,137.83 Earth masses
Surface gravity around 6.73 g
An orbital period of 4,885.000 days
Semi-major axis 5.5000 AU
Distance from Earth 483.32 light-years
Earth Similarity Index 0.411
Travel time at Voyager 1 speed 8,523,362 years

HD 190984 b Planet Profile

Physical Specs

Radius

13.00 R⊕

Radius (Jupiter)

1.160 R♃

Mass

1,137.83 M⊕

Mass (Jupiter)

3.580 M♃

Density

2.85 g/cm³

Surface Gravity

6.73 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.411

HZ Position Unknown

Controversial No

Discovery

Year 2009

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#960of 1771

top 54.2%

This planet

13.00R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HIP 14810 b 13.00 R⊕ HD 47186 c 13.00 R⊕ WASP-107 c 13.00 R⊕

Metric	Earth	HD 190984 b	Jupiter
Radius (R⊕)	1.00	13.00	11.21
Mass (M⊕)	1.00	1,137.83	317.83
Density (g/cm³)	5.51	2.85	1.33
Surface Gravity (g)	1.00	6.73	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,137.826 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	985.200 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 190984

HIP

HIP 99496

TIC

TIC 466222634

Gaia DR2

Gaia DR2 6429295051154269440

Gaia DR3

Gaia DR3 6429295051154269440

System

HD 190984

Percentile among Gas Giant cohort

Radius 13.000 R⊕ · percentile 43 / cohort 1771

Mass 1,137.826 M⊕ · percentile 69 / cohort 1747

Orbital period 4,885.00 d · percentile 92 / cohort 1533

Distance 148.19 pc · percentile 44 / cohort 1759

ESI 0.411 · percentile 88 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4,885.000 days

Semi-major axis

5.5000 AU

Eccentricity

0.570

Inclination

64.00 °

Year Length

A year here lasts about 13.37 Earth years on a highly eccentric trajectory at a mean orbital distance of 5.5000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.411

0 = alien, 1 = Earth-identical

Detection Signatures

Radial velocity

Stellar wobble has been measured spectroscopically.

Astrometry

Positional wobble of the host star was measured.

Discovery Paper

Primary reference

Santos et al. 2010

Instrument

HARPS Spectrograph

Publication

2010-03

Observation locale

Ground

Discovery cohort

Planets confirmed in 2009 at La Silla Observatory (12 shown).

GJ 581 e · Super-Earth HD 125612 c · Neptune-like HD 90156 b · Neptune-like HD 147018 c · Gas Giant HD 103197 b · Neptune-like HD 125612 d · Gas Giant HIP 70849 b · Gas Giant HD 85390 b · Neptune-like HD 171238 b · Gas Giant HD 290327 b · Gas Giant HD 147018 b · Gas Giant HD 110014 b · Gas Giant

Host System: HD 190984

Spectral Class

F-type yellow-white

Effective Temperature

5,988 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.530 R☉

Stellar Mass

0.910 M☉

Metallicity [Fe/H]

-0.48

Extended Stellar Properties

Surface gravity (log g)

4.020 dex

Stellar density

0.126 g/cm³

Systemic radial velocity

20.27 km/s

Rotational v·sin i

3.40 km/s

Metallicity ratio

[Fe/H]

Distance

148.19 parsec

Light-years 483.32 ly

V-band magnitude

8.76 mag

Voyager-speed travel 8,523,362 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

6.720 mas

Total Proper Motion

45.481 mas/yr

PM Right Ascension

0.28 mas/yr

PM Declination

45.48 mas/yr

Galactic Cartesian (pc)

x = 0.233 · y = -0.360 · z = -0.903

Equatorial (J2000)

RA 302.87798° · Dec -64.62027°

Galactic ℓ, b

331.579° · -32.858°

Ecliptic λ, β

288.640° · -43.294°

HTM-20 index

821007721