Key parameters at a glance

A radius of 12.80 Earth radii
A mass of 1,760.77 Earth masses
Surface gravity around 10.75 g
An orbital period of 223.800 days
Semi-major axis 0.7680 AU
Equilibrium temperature 380 K (107 °C)
Distance from Earth 271.01 light-years
Earth Similarity Index 0.436
Travel time at Voyager 1 speed 4,779,247 years

HD 211403 b Planet Profile

Physical Specs

Radius

12.80 R⊕

Radius (Jupiter)

1.140 R♃

Mass

1,760.77 M⊕

Mass (Jupiter)

5.540 M♃

Density

4.61 g/cm³

Surface Gravity

10.75 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.436

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Radial Velocity

Facility Haute-Provence Observatory

Telescope 1.93 m Telescope

Size rank in cohort

Rank by radius

#1063of 1771

top 60.0%

This planet

12.80R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 240210 b 12.80 R⊕ HD 29985 b 12.80 R⊕ HD 148164 c 12.80 R⊕

Metric	Earth	HD 211403 b	Jupiter
Radius (R⊕)	1.00	12.80	11.21
Mass (M⊕)	1.00	1,760.77	317.83
Density (g/cm³)	5.51	4.61	1.33
Surface Gravity (g)	1.00	10.75	2.53
Insolation (S⊕)	1.00	3.44	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,760.769 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 211403

HIP

HIP 109876

TIC

TIC 330485001

Gaia DR2

Gaia DR2 2198848918548722304

Gaia DR3

Gaia DR3 2198848918548722304

System

HD 211403

Percentile among Gas Giant cohort

Radius 12.800 R⊕ · percentile 37 / cohort 1771

Mass 1,760.769 M⊕ · percentile 77 / cohort 1747

Orbital period 223.80 d · percentile 58 / cohort 1533

Distance 83.09 pc · percentile 31 / cohort 1759

ESI 0.436 · percentile 96 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

223.800 days

Semi-major axis

0.7680 AU

Eccentricity

0.084

Inclination

— °

Year Length

A year here lasts approximately 223.80 Earth days (61.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.7680 AU.

Extended Orbital Architecture

Semi-major axis / stellar radius

136.900

RV semi-amplitude (K)

165.500 m/s

Long. of periastron (ω)

190.00°

Angular separation (arcsec)

9.24000

Eq. Temperature

380K

(107 °C)

Insolation (S⊕)

3.44

Earth = 1.00

Earth Similarity (ESI)

0.436

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

Discovery Paper

Primary reference

Demangeon et al. 2021

Instrument

SOPHIE Spectrograph

Publication

2021-09

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at Haute-Provence Observatory (11 shown).

HD 27969 b · Gas Giant HD 109286 b · Gas Giant HD 80869 b · Gas Giant BD+63 1405 b · Gas Giant HD 331093 b · Gas Giant BD+45 564 b · Gas Giant HD 95544 b · Gas Giant HD 115954 b · Gas Giant HD 124330 b · Gas Giant HD 155193 b · Gas Giant BD+55 362 b · Gas Giant

Host System: HD 211403

Spectral Class

F-type yellow-white

Effective Temperature

6,273 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.206 R☉

Stellar Mass

1.200 M☉

Metallicity [Fe/H]

0.18

Extended Stellar Properties

Surface gravity (log g)

4.300 dex

Stellar density

0.737 g/cm³

Rotational v·sin i

18.40 km/s

Metallicity ratio

[Fe/H]

Distance

83.09 parsec

Light-years 271.01 ly

V-band magnitude

8.48 mag

Voyager-speed travel 4,779,247 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

12.006 mas

Total Proper Motion

103.521 mas/yr

PM Right Ascension

102.30 mas/yr

PM Declination

15.88 mas/yr

Galactic Cartesian (pc)

x = 0.472 · y = -0.232 · z = 0.851

Equatorial (J2000)

RA 333.81582° · Dec 58.27556°

Galactic ℓ, b

103.583° · 1.397°

Ecliptic λ, β

14.885° · 60.773°

HTM-20 index

-1266699316