Key parameters at a glance

A radius of 2.99 Earth radii
A mass of 9.22 Earth masses
Surface gravity around 1.03 g
An orbital period of 11.122 days
Semi-major axis 0.0990 AU
Distance from Earth 133.73 light-years
Earth Similarity Index 0.640
Travel time at Voyager 1 speed 2,358,302 years

HD 213519 b Planet Profile

Physical Specs

Radius

2.99 R⊕

Radius (Jupiter)

0.267 R♃

Mass

9.22 M⊕

Mass (Jupiter)

0.029 M♃

Density

1.89 g/cm³

Surface Gravity

1.03 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.640

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#529of 1978

top 26.7%

This planet

2.99R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-255 c 2.99 R⊕ Kepler-978 b 2.99 R⊕ MOA-2010-BLG-328L b 2.99 R⊕

Metric	Earth	HD 213519 b	Jupiter
Radius (R⊕)	1.00	2.99	11.21
Mass (M⊕)	1.00	9.22	317.83
Density (g/cm³)	5.51	1.89	1.33
Surface Gravity (g)	1.00	1.03	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	9.217 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 213519

TIC

TIC 200215494

Gaia DR2

Gaia DR2 1982946891164168576

Gaia DR3

Gaia DR3 1982946891164168576

System

HD 213519

Percentile among Sub-Neptune cohort

Radius 2.990 R⊕ · percentile 73 / cohort 1978

Mass 9.217 M⊕ · percentile 67 / cohort 1978

Orbital period 11.12 d · percentile 39 / cohort 1946

Distance 41.00 pc · percentile 10 / cohort 1975

ESI 0.640 · percentile 87 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

11.122 days

Semi-major axis

0.0990 AU

Eccentricity

0.413

Inclination

— °

Year Length

A year here lasts approximately 11.12 Earth days (3.0% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0990 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.640

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Feng et al. 2022

Instrument

Multiple Instruments

Publication

2022-09

Observation locale

Ground

Discovery cohort

Planets confirmed in 2022 at Multiple Observatories (12 shown).

Kepler-138 e · Rocky Terrestrial HD 93351 b · Super-Earth GJ 1002 b · Rocky Terrestrial GJ 2030 b · Sub-Neptune GJ 3929 c · Sub-Neptune HD 217786 c · Sub-Neptune GJ 1002 c · Rocky Terrestrial HD 155918 b · Sub-Neptune HD 191939 g · Sub-Neptune GJ 514 b · Sub-Neptune HD 12235 b · Sub-Neptune HD 18143 b · Sub-Neptune

Host System: HD 213519

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,840 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.083 R☉

Stellar Mass

1.050 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.390 dex

Stellar density

1.166 g/cm³

Metallicity ratio

[M/H]

Distance

41.00 parsec

Light-years 133.73 ly

V-band magnitude

7.68 mag

Voyager-speed travel 2,358,302 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

24.361 mas

Total Proper Motion

178.109 mas/yr

PM Right Ascension

-174.73 mas/yr

PM Declination

34.55 mas/yr

Galactic Cartesian (pc)

x = 0.653 · y = -0.267 · z = 0.709

Equatorial (J2000)

RA 337.77278° · Dec 45.14525°

Galactic ℓ, b

98.540° · -10.977°

Ecliptic λ, β

3.257° · 49.159°

HTM-20 index

-1069835691