Key parameters at a glance

A radius of 13.20 Earth radii
A mass of 937.60 Earth masses
Surface gravity around 5.38 g
An orbital period of 499.400 days
Semi-major axis 1.2800 AU
Distance from Earth 158.04 light-years
Earth Similarity Index 0.395
Travel time at Voyager 1 speed 2,787,010 years

HD 153950 b Planet Profile

Physical Specs

Radius

13.20 R⊕

Radius (Jupiter)

1.170 R♃

Mass

937.60 M⊕

Mass (Jupiter)

2.950 M♃

Density

2.24 g/cm³

Surface Gravity

5.38 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.395

HZ Position Unknown

Controversial No

Discovery

Year 2008

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#847of 1771

top 47.8%

This planet

13.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 12661 c 13.20 R⊕ HD 37605 b 13.20 R⊕ MOA-2009-BLG-387L b 13.20 R⊕

Metric	Earth	HD 153950 b	Jupiter
Radius (R⊕)	1.00	13.20	11.21
Mass (M⊕)	1.00	937.60	317.83
Density (g/cm³)	5.51	2.24	1.33
Surface Gravity (g)	1.00	5.38	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	937.599 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 153950

HIP

HIP 83547

TIC

TIC 124165580

Gaia DR2

Gaia DR2 5965406010180880640

Gaia DR3

Gaia DR3 5965406010180880640

System

HD 153950

Percentile among Gas Giant cohort

Radius 13.200 R⊕ · percentile 49 / cohort 1771

Mass 937.599 M⊕ · percentile 65 / cohort 1747

Orbital period 499.40 d · percentile 68 / cohort 1533

Distance 48.45 pc · percentile 19 / cohort 1759

ESI 0.395 · percentile 84 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

499.400 days

Semi-major axis

1.2800 AU

Eccentricity

0.340

Inclination

— °

Year Length

A year here lasts about 1.37 Earth years on a highly eccentric trajectory at a mean orbital distance of 1.2800 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.395

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Moutou et al. 2009

Instrument

HARPS Spectrograph

Publication

2009-03

Observation locale

Ground

Discovery cohort

Planets confirmed in 2008 at La Silla Observatory (12 shown).

HD 285968 b · Sub-Neptune HD 47186 b · Neptune-like HD 145377 b · Gas Giant BD-17 63 b · Gas Giant HD 73267 b · Gas Giant HD 181433 d · Gas Giant HD 60532 c · Gas Giant HD 45364 b · Neptune-like HD 20868 b · Gas Giant HD 60532 b · Gas Giant HD 45364 c · Gas Giant HD 47186 c · Gas Giant

Host System: HD 153950

Spectral Class

F-type yellow-white

Effective Temperature

6,124 K — hotter than the Sun (5,778 K)

Estimated Age

4.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.280 R☉

Stellar Mass

1.250 M☉

Metallicity [Fe/H]

-0.01

Extended Stellar Properties

Surface gravity (log g)

4.320 dex

Stellar density

0.618 g/cm³

Systemic radial velocity

33.25 km/s

Rotational v·sin i

5.00 km/s

Metallicity ratio

[Fe/H]

Distance

48.45 parsec

Light-years 158.04 ly

V-band magnitude

7.39 mag

Voyager-speed travel 2,787,010 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

20.609 mas

Total Proper Motion

178.896 mas/yr

PM Right Ascension

110.49 mas/yr

PM Declination

-140.69 mas/yr

Galactic Cartesian (pc)

x = -0.174 · y = -0.706 · z = -0.686

Equatorial (J2000)

RA 256.12928° · Dec -43.31038°

Galactic ℓ, b

343.476° · -1.232°

Ecliptic λ, β

259.271° · -20.386°

HTM-20 index

635536882