Key parameters at a glance

A radius of 12.00 Earth radii
A mass of 7,500.75 Earth masses
Surface gravity around 52.09 g
An orbital period of 31,000.000 days
Semi-major axis 22.1000 AU
Distance from Earth 216.31 light-years
Earth Similarity Index 0.271
Travel time at Voyager 1 speed 3,814,666 years

HIP 39017 b Planet Profile

Physical Specs

Radius

12.00 R⊕

Radius (Jupiter)

1.070 R♃

Mass

7,500.75 M⊕

Mass (Jupiter)

23.600 M♃

Density

23.90 g/cm³

Surface Gravity

52.09 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.271

HZ Position Unknown

Controversial No

Discovery

Year 2024

Method Imaging

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1494of 1771

top 84.3%

This planet

12.00R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 80913 b 12.00 R⊕ HIP 78530 b 12.00 R⊕ HD 221420 b 12.00 R⊕

Metric	Earth	HIP 39017 b	Jupiter
Radius (R⊕)	1.00	12.00	11.21
Mass (M⊕)	1.00	7,500.75	317.83
Density (g/cm³)	5.51	23.90	1.33
Surface Gravity (g)	1.00	52.09	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	7,500.750 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 65526

HIP

HIP 39017

TIC

TIC 26045729

Gaia DR2

Gaia DR2 3068540350999693952

Gaia DR3

Gaia DR3 3068540350999693952

System

HIP 39017

Percentile among Gas Giant cohort

Radius 12.000 R⊕ · percentile 15 / cohort 1771

Mass 7,500.750 M⊕ · percentile 98 / cohort 1747

Orbital period 31,000.00 d · percentile 99 / cohort 1533

Distance 66.32 pc · percentile 27 / cohort 1759

ESI 0.271 · percentile 50 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

31,000.000 days

Semi-major axis

22.1000 AU

Eccentricity

0.550

Inclination

84.00 °

Year Length

A year here lasts about 84.87 Earth years on a highly eccentric trajectory at a mean orbital distance of 22.1000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.271

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Tobin et al. 2024

Instrument

Multiple Instruments

Publication

2024-05

Observation locale

Ground

Discovery cohort

Planets confirmed in 2024 at Multiple Observatories (12 shown).

HD 134606 e · Super-Earth Kepler-51 e · Sub-Neptune HD 134606 f · Sub-Neptune HD 134606 b · Sub-Neptune Teegarden's Star d · Rocky Terrestrial HD 134606 c · Sub-Neptune HD 104067 c · Sub-Neptune GJ 1289 b · Sub-Neptune TOI-4562 c · Gas Giant HD 222237 b · Gas Giant CI Tau c · Gas Giant HD 75898 c · Gas Giant

Host System: HIP 39017

Spectral Class

A-type white

Effective Temperature

7,201 K — hotter than the Sun (5,778 K)

Estimated Age

0.12 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.520 R☉

Stellar Mass

1.520 M☉

Metallicity [Fe/H]

-0.26

Extended Stellar Properties

Surface gravity (log g)

4.281 dex

Stellar density

0.647 g/cm³

Metallicity ratio

[Fe/H]

Distance

66.32 parsec

Light-years 216.31 ly

V-band magnitude

6.96 mag

Voyager-speed travel 3,814,666 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

15.049 mas

Total Proper Motion

52.190 mas/yr

PM Right Ascension

30.10 mas/yr

PM Declination

-42.63 mas/yr

Galactic Cartesian (pc)

x = -0.495 · y = 0.866 · z = -0.076

Equatorial (J2000)

RA 119.76658° · Dec -4.33260°

Galactic ℓ, b

224.741° · 12.923°

Ecliptic λ, β

122.935° · -24.432°

HTM-20 index

-1164708375

Similar Worlds

HIP 99770 b

Gas Giant · A-type white

Radius 12.20 R⊕ · 130.7 ly

HIP 54515 b

Gas Giant · A-type white

Radius 12.20 R⊕ · 270.1 ly

KIC 7917485 b

Gas Giant · A-type white

Radius 12.40 R⊕ · 4,510.4 ly

AB Aur b

Gas Giant · A-type white

Radius 12.50 R⊕ · 528.8 ly

bet Pic c

Gas Giant · A-type white

Radius 12.50 R⊕ · 64.4 ly

WD 0806-661 b

Gas Giant · A-type white

Radius 12.60 R⊕ · 62.8 ly

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