Key parameters at a glance

A radius of 13.90 Earth radii
A mass of 273.33 Earth masses
Surface gravity around 1.41 g
An orbital period of 68.270 days
Semi-major axis 0.3300 AU
Distance from Earth 221.25 light-years
Earth Similarity Index 0.296
Travel time at Voyager 1 speed 3,901,701 years

HD 109246 b Planet Profile

Physical Specs

Radius

13.90 R⊕

Radius (Jupiter)

1.240 R♃

Mass

273.33 M⊕

Mass (Jupiter)

0.860 M♃

Density

0.56 g/cm³

Surface Gravity

1.41 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.296

HZ Position Unknown

Controversial No

Discovery

Year 2010

Method Radial Velocity

Facility Haute-Provence Observatory

Telescope 1.93 m Telescope

Size rank in cohort

Rank by radius

#456of 1771

top 25.7%

This planet

13.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

24 Sex c 13.90 R⊕ HD 148156 b 13.90 R⊕ HD 134987 c 13.90 R⊕

Metric	Earth	HD 109246 b	Jupiter
Radius (R⊕)	1.00	13.90	11.21
Mass (M⊕)	1.00	273.33	317.83
Density (g/cm³)	5.51	0.56	1.33
Surface Gravity (g)	1.00	1.41	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	273.334 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 109246

HIP

HIP 61177

TIC

TIC 154549250

Gaia DR2

Gaia DR2 1692267077979468544

Gaia DR3

Gaia DR3 1692267077979468544

System

HD 109246

Percentile among Gas Giant cohort

Radius 13.900 R⊕ · percentile 72 / cohort 1771

Mass 273.334 M⊕ · percentile 30 / cohort 1747

Orbital period 68.27 d · percentile 52 / cohort 1533

Distance 67.83 pc · percentile 28 / cohort 1759

ESI 0.296 · percentile 57 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

68.270 days

Semi-major axis

0.3300 AU

Eccentricity

0.120

Inclination

— °

Year Length

A year here lasts approximately 68.27 Earth days (18.7% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.3300 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.296

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Boisse et al. 2010

Instrument

SOPHIE Spectrograph

Publication

2010-11

Observation locale

Ground

Host System: HD 109246

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,844 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.070 R☉

Stellar Mass

1.200 M☉

Metallicity [Fe/H]

0.10

Extended Stellar Properties

Surface gravity (log g)

4.460 dex

Stellar density

1.099 g/cm³

Systemic radial velocity

-19.46 km/s

Rotational v·sin i

3.00 km/s

Metallicity ratio

[Fe/H]

Distance

67.83 parsec

Light-years 221.25 ly

V-band magnitude

8.75 mag

Voyager-speed travel 3,901,701 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

14.713 mas

Total Proper Motion

178.693 mas/yr

PM Right Ascension

-171.94 mas/yr

PM Declination

-48.65 mas/yr

Galactic Cartesian (pc)

x = -0.265 · y = -0.037 · z = 0.964

Equatorial (J2000)

RA 188.02718° · Dec 74.48934°

Galactic ℓ, b

124.685° · 42.573°

Ecliptic λ, β

127.183° · 64.017°

HTM-20 index

1700998459