Key parameters at a glance

A radius of 14.00 Earth radii
A mass of 247.91 Earth masses
Surface gravity around 1.26 g
An orbital period of 275.500 days
Semi-major axis 0.9400 AU
Distance from Earth 342.25 light-years
Earth Similarity Index 0.287
Travel time at Voyager 1 speed 6,035,610 years

HD 219139 b Planet Profile

Physical Specs

Radius

14.00 R⊕

Radius (Jupiter)

1.240 R♃

Mass

247.91 M⊕

Mass (Jupiter)

0.780 M♃

Density

0.50 g/cm³

Surface Gravity

1.26 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.287

HZ Position Unknown

Controversial No

Discovery

Year 2021

Method Radial Velocity

Facility Okayama Astrophysical Observatory

Telescope 1.88 m Telescope

Size rank in cohort

Rank by radius

#415of 1771

top 23.4%

This planet

14.00R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 9446 b 14.00 R⊕ HD 156411 b 14.00 R⊕ HD 224693 b 14.00 R⊕

Metric	Earth	HD 219139 b	Jupiter
Radius (R⊕)	1.00	14.00	11.21
Mass (M⊕)	1.00	247.91	317.83
Density (g/cm³)	5.51	0.50	1.33
Surface Gravity (g)	1.00	1.26	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	247.906 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 219139

TIC

TIC 423269863

Gaia DR2

Gaia DR2 2810597431380568448

Gaia DR3

Gaia DR3 2810597431380568448

System

HD 219139

Percentile among Gas Giant cohort

Radius 14.000 R⊕ · percentile 74 / cohort 1771

Mass 247.906 M⊕ · percentile 26 / cohort 1747

Orbital period 275.50 d · percentile 60 / cohort 1533

Distance 104.94 pc · percentile 35 / cohort 1759

ESI 0.287 · percentile 54 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

275.500 days

Semi-major axis

0.9400 AU

Eccentricity

0.110

Inclination

— °

Year Length

A year here lasts approximately 275.50 Earth days (75.4% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.9400 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.287

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Teng et al. 2021

Instrument

HIDES Echelle Spectrograph

Publication

2021-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at Okayama Astrophysical Observatory (7 shown).

gam Psc b · Gas Giant HD 99283 b · Gas Giant HD 360 b · Gas Giant HD 79181 b · Gas Giant HD 161178 b · Gas Giant ups Leo b · Gas Giant HD 10975 b · Gas Giant

Host System: HD 219139

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

4,831 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

11.220 R☉

Stellar Mass

1.460 M☉

Metallicity [Fe/H]

-0.20

Extended Stellar Properties

Surface gravity (log g)

2.480 dex

Rotational v·sin i

2.04 km/s

Metallicity ratio

[Fe/H]

Distance

104.94 parsec

Light-years 342.25 ly

V-band magnitude

5.85 mag

Voyager-speed travel 6,035,610 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

9.503 mas

Total Proper Motion

8.098 mas/yr

PM Right Ascension

-6.63 mas/yr

PM Declination

-4.66 mas/yr

Galactic Cartesian (pc)

x = 0.961 · y = -0.198 · z = 0.192

Equatorial (J2000)

RA 348.36041° · Dec 11.06498°

Galactic ℓ, b

87.784° · -45.015°

Ecliptic λ, β

353.743° · 14.765°

HTM-20 index

25953881