Key parameters at a glance

A radius of 13.40 Earth radii
A mass of 585.12 Earth masses
Surface gravity around 3.26 g
An orbital period of 322.030 days
Semi-major axis 1.1580 AU
Distance from Earth 431.13 light-years
Earth Similarity Index 0.360
Travel time at Voyager 1 speed 7,602,907 years

HD 173416 b Planet Profile

Physical Specs

Radius

13.40 R⊕

Radius (Jupiter)

1.200 R♃

Mass

585.12 M⊕

Mass (Jupiter)

1.841 M♃

Density

1.34 g/cm³

Surface Gravity

3.26 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.360

HZ Position Unknown

Controversial No

Discovery

Year 2008

Method Radial Velocity

Facility Xinglong Station

Telescope 2.16 m 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 173416 b	Jupiter
Radius (R⊕)	1.00	13.40	11.21
Mass (M⊕)	1.00	585.12	317.83
Density (g/cm³)	5.51	1.34	1.33
Surface Gravity (g)	1.00	3.26	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	585.122 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 173416

HIP

HIP 91852

TIC

TIC 157951225

Gaia DR2

Gaia DR2 2096524140211914368

Gaia DR3

Gaia DR3 2096524140211914368

System

HD 173416

Percentile among Gas Giant cohort

Radius 13.400 R⊕ · percentile 56 / cohort 1771

Mass 585.122 M⊕ · percentile 53 / cohort 1747

Orbital period 322.03 d · percentile 61 / cohort 1533

Distance 132.18 pc · percentile 41 / cohort 1759

ESI 0.360 · percentile 73 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

322.030 days

Semi-major axis

1.1580 AU

Eccentricity

0.208

Inclination

— °

Year Length

A year here lasts approximately 322.03 Earth days (88.2% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 1.1580 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.360

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Liu et al. 2009

Instrument

Coude Echelle Spectrograph

Publication

2009-01

Observation locale

Ground

Host System: HD 173416

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

4,683 K — cooler than the Sun (5,778 K)

Estimated Age

1.73 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

13.500 R☉

Stellar Mass

2.000 M☉

Metallicity [Fe/H]

-0.22

Extended Stellar Properties

Surface gravity (log g)

2.480 dex

Systemic radial velocity

-61.17 km/s

Metallicity ratio

[Fe/H]

Distance

132.18 parsec

Light-years 431.13 ly

V-band magnitude

6.04 mag

Voyager-speed travel 7,602,907 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

7.537 mas

Total Proper Motion

61.889 mas/yr

PM Right Ascension

20.78 mas/yr

PM Declination

58.30 mas/yr

Galactic Cartesian (pc)

x = 0.152 · y = -0.789 · z = 0.596

Equatorial (J2000)

RA 280.90057° · Dec 36.55686°

Galactic ℓ, b

65.742° · 17.219°

Ecliptic λ, β

287.328° · 59.342°

HTM-20 index

-212203844