Key parameters at a glance

A radius of 13.10 Earth radii
A mass of 1,010.70 Earth masses
Surface gravity around 5.89 g
An orbital period of 218.470 days
Semi-major axis 0.7400 AU
Distance from Earth 210.86 light-years
Earth Similarity Index 0.401
Travel time at Voyager 1 speed 3,718,502 years

HD 220842 b Planet Profile

Physical Specs

Radius

13.10 R⊕

Radius (Jupiter)

1.170 R♃

Mass

1,010.70 M⊕

Mass (Jupiter)

3.180 M♃

Density

2.47 g/cm³

Surface Gravity

5.89 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.401

HZ Position Unknown

Controversial No

Discovery

Year 2016

Method Radial Velocity

Facility Haute-Provence Observatory

Telescope 1.93 m Telescope

Size rank in cohort

Rank by radius

#910of 1771

top 51.3%

This planet

13.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

GJ 3021 b 13.10 R⊕ HD 221287 b 13.10 R⊕ HD 37605 c 13.10 R⊕

Metric	Earth	HD 220842 b	Jupiter
Radius (R⊕)	1.00	13.10	11.21
Mass (M⊕)	1.00	1,010.70	317.83
Density (g/cm³)	5.51	2.47	1.33
Surface Gravity (g)	1.00	5.89	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,010.699 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 220842

HIP

HIP 115714

TIC

TIC 251866143

Gaia DR2

Gaia DR2 1997273733835247616

Gaia DR3

Gaia DR3 1997273733835247616

System

HD 220842

Percentile among Gas Giant cohort

Radius 13.100 R⊕ · percentile 46 / cohort 1771

Mass 1,010.699 M⊕ · percentile 67 / cohort 1747

Orbital period 218.47 d · percentile 58 / cohort 1533

Distance 64.65 pc · percentile 27 / cohort 1759

ESI 0.401 · percentile 86 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

218.470 days

Semi-major axis

0.7400 AU

Eccentricity

0.404

Inclination

— °

Year Length

A year here lasts approximately 218.47 Earth days (59.8% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.7400 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.401

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

H Eacute Brard et al. 2016

Instrument

SOPHIE Spectrograph

Publication

2016-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2016 at Haute-Provence Observatory (10 shown).

HD 35759 b · Gas Giant HD 12484 b · Gas Giant HD 191806 b · Gas Giant HIP 109600 b · Gas Giant HD 221585 b · Gas Giant HIP 109384 b · Gas Giant HD 143105 b · Gas Giant HD 214823 b · Gas Giant HIP 65407 c · Gas Giant HIP 65407 b · Gas Giant

Host System: HD 220842

Spectral Class

F-type yellow-white

Effective Temperature

5,960 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.416 R☉

Stellar Mass

1.130 M☉

Metallicity [Fe/H]

-0.17

Extended Stellar Properties

Surface gravity (log g)

4.240 dex

Stellar density

0.519 g/cm³

Systemic radial velocity

-22.57 km/s

Rotational v·sin i

3.40 km/s

Metallicity ratio

[Fe/H]

Distance

64.65 parsec

Light-years 210.86 ly

V-band magnitude

7.98 mag

Voyager-speed travel 3,718,502 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

15.439 mas

Total Proper Motion

168.601 mas/yr

PM Right Ascension

-89.12 mas/yr

PM Declination

143.12 mas/yr

Galactic Cartesian (pc)

x = 0.541 · y = -0.079 · z = 0.838

Equatorial (J2000)

RA 351.65342° · Dec 56.88714°

Galactic ℓ, b

111.505° · -4.091°

Ecliptic λ, β

25.721° · 53.132°

HTM-20 index

-96445540