Key parameters at a glance

A radius of 13.30 Earth radii
A mass of 772.33 Earth masses
Surface gravity around 4.37 g
An orbital period of 2,443.000 days
Semi-major axis 3.4300 AU
Distance from Earth 184.06 light-years
Earth Similarity Index 0.380
Travel time at Voyager 1 speed 3,245,891 years

HD 290327 b Planet Profile

Physical Specs

Radius

13.30 R⊕

Radius (Jupiter)

1.180 R♃

Mass

772.33 M⊕

Mass (Jupiter)

2.430 M♃

Density

1.80 g/cm³

Surface Gravity

4.37 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.380

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

#793of 1771

top 44.7%

This planet

13.30R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 12661 b 13.30 R⊕ HD 129445 b 13.30 R⊕ GJ 876 b 13.30 R⊕

Metric	Earth	HD 290327 b	Jupiter
Radius (R⊕)	1.00	13.30	11.21
Mass (M⊕)	1.00	772.33	317.83
Density (g/cm³)	5.51	1.80	1.33
Surface Gravity (g)	1.00	4.37	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	772.327 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 290327

HIP

HIP 25191

TIC

TIC 4205424

Gaia DR2

Gaia DR2 3214129537488896896

Gaia DR3

Gaia DR3 3214129537488896896

System

HD 290327

Percentile among Gas Giant cohort

Radius 13.300 R⊕ · percentile 53 / cohort 1771

Mass 772.327 M⊕ · percentile 60 / cohort 1747

Orbital period 2,443.00 d · percentile 87 / cohort 1533

Distance 56.43 pc · percentile 23 / cohort 1759

ESI 0.380 · percentile 79 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

2,443.000 days

Semi-major axis

3.4300 AU

Eccentricity

0.080

Inclination

— °

Year Length

A year here lasts about 6.69 Earth years on a nearly circular orbit at a mean orbital distance of 3.4300 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.380

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Naef et al. 2010

Instrument

HARPS Spectrograph

Publication

2010-11

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 190984 b · Gas Giant HD 171238 b · Gas Giant HD 147018 b · Gas Giant HD 110014 b · Gas Giant

Host System: HD 290327

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,505 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.950 R☉

Stellar Mass

0.840 M☉

Metallicity [Fe/H]

-0.14

Extended Stellar Properties

Surface gravity (log g)

4.410 dex

Stellar density

1.653 g/cm³

Systemic radial velocity

29.56 km/s

Rotational v·sin i

1.44 km/s

Metallicity ratio

[Fe/H]

Distance

56.43 parsec

Light-years 184.06 ly

V-band magnitude

8.99 mag

Voyager-speed travel 3,245,891 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

17.691 mas

Total Proper Motion

102.453 mas/yr

PM Right Ascension

32.31 mas/yr

PM Declination

-97.22 mas/yr

Galactic Cartesian (pc)

x = 0.159 · y = 0.986 · z = -0.040

Equatorial (J2000)

RA 80.83999° · Dec -2.27804°

Galactic ℓ, b

204.613° · -20.581°

Ecliptic λ, β

79.855° · -25.395°

HTM-20 index

554869114