Key parameters at a glance

A radius of 12.80 Earth radii
A mass of 1,748.06 Earth masses
Surface gravity around 10.67 g
An orbital period of 3,391.200 days
Semi-major axis 4.7130 AU
Distance from Earth 186.91 light-years
Earth Similarity Index 0.435
Travel time at Voyager 1 speed 3,296,121 years

HD 89839 b Planet Profile

Physical Specs

Radius

12.80 R⊕

Radius (Jupiter)

1.140 R♃

Mass

1,748.06 M⊕

Mass (Jupiter)

5.500 M♃

Density

4.58 g/cm³

Surface Gravity

10.67 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.435

HZ Position Unknown

Controversial No

Discovery

Year 2023

Method Radial Velocity

Facility Multiple Facilities

Telescope Multiple Telescopes

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 89839 b	Jupiter
Radius (R⊕)	1.00	12.80	11.21
Mass (M⊕)	1.00	1,748.06	317.83
Density (g/cm³)	5.51	4.58	1.33
Surface Gravity (g)	1.00	10.67	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,748.056 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	1,196.900 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 89839

HIP

HIP 50653

TIC

TIC 294028147

Gaia DR2

Gaia DR2 5355799586503538176

Gaia DR3

Gaia DR3 5355799586503538176

System

HD 89839

Percentile among Gas Giant cohort

Radius 12.800 R⊕ · percentile 37 / cohort 1771

Mass 1,748.056 M⊕ · percentile 77 / cohort 1747

Orbital period 3,391.20 d · percentile 89 / cohort 1533

Distance 57.31 pc · percentile 24 / cohort 1759

ESI 0.435 · percentile 96 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3,391.200 days

Semi-major axis

4.7130 AU

Eccentricity

0.185

Inclination

49.50 °

Year Length

A year here lasts about 9.28 Earth years on a mildly elliptical path at a mean orbital distance of 4.7130 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.435

0 = alien, 1 = Earth-identical

Detection Signatures

Radial velocity

Stellar wobble has been measured spectroscopically.

Astrometry

Positional wobble of the host star was measured.

Discovery Paper

Primary reference

Xiao et al. 2023

Instrument

Multiple Instruments

Publication

2023-05

Observation locale

Multiple Locales

Discovery cohort

Planets confirmed in 2023 at Multiple Facilities (3 shown).

GJ 1151 c · Sub-Neptune HD 167677 b · Gas Giant HD 165131 b · Gas Giant

Host System: HD 89839

Spectral Class

F-type yellow-white

Effective Temperature

6,314 K — hotter than the Sun (5,778 K)

Estimated Age

1.60 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.286 R☉

Stellar Mass

1.210 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

0.822 g/cm³

Systemic radial velocity

31.76 km/s

Rotational v·sin i

4.20 km/s

Activity index (log R'HK)

-4.940

Metallicity ratio

[Fe/H]

Distance

57.31 parsec

Light-years 186.91 ly

V-band magnitude

7.64 mag

Voyager-speed travel 3,296,121 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

17.421 mas

Total Proper Motion

16.200 mas/yr

PM Right Ascension

-6.48 mas/yr

PM Declination

14.85 mas/yr

Galactic Cartesian (pc)

x = -0.538 · y = 0.249 · z = -0.806

Equatorial (J2000)

RA 155.16888° · Dec -53.66403°

Galactic ℓ, b

281.665° · 2.864°

Ecliptic λ, β

189.719° · -56.936°

HTM-20 index

-385236258