Key parameters at a glance

A radius of 12.80 Earth radii
A mass of 1,716.27 Earth masses
Surface gravity around 10.48 g
An orbital period of 4,356.000 days
Semi-major axis 5.3000 AU
Distance from Earth 98.92 light-years
Earth Similarity Index 0.434
Travel time at Voyager 1 speed 1,744,440 years

HD 75302 b Planet Profile

Physical Specs

Radius

12.80 R⊕

Radius (Jupiter)

1.140 R♃

Mass

1,716.27 M⊕

Mass (Jupiter)

5.400 M♃

Density

4.50 g/cm³

Surface Gravity

10.48 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.434

HZ Position Unknown

Controversial No

Discovery

Year 2023

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO 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 75302 b	Jupiter
Radius (R⊕)	1.00	12.80	11.21
Mass (M⊕)	1.00	1,716.27	317.83
Density (g/cm³)	5.51	4.50	1.33
Surface Gravity (g)	1.00	10.48	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,716.273 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 75302

HIP

HIP 43297

TIC

TIC 262587669

Gaia DR2

Gaia DR2 581100382135253760

Gaia DR3

Gaia DR3 581100382135253760

System

HD 75302

Percentile among Gas Giant cohort

Radius 12.800 R⊕ · percentile 37 / cohort 1771

Mass 1,716.273 M⊕ · percentile 77 / cohort 1747

Orbital period 4,356.00 d · percentile 91 / cohort 1533

Distance 30.33 pc · percentile 8 / cohort 1759

ESI 0.434 · percentile 95 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4,356.000 days

Semi-major axis

5.3000 AU

Eccentricity

0.390

Inclination

29.00 °

Year Length

A year here lasts about 11.93 Earth years on a highly eccentric trajectory at a mean orbital distance of 5.3000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.434

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Philipot et al. 2023

Instrument

HARPS Spectrograph

Publication

2023-08

Observation locale

Ground

Discovery cohort

Planets confirmed in 2023 at La Silla Observatory (12 shown).

GJ 367 c · Super-Earth GJ 367 d · Sub-Neptune TOI-544 c · Neptune-like HD 74698 b · Neptune-like BD-210397 c · Gas Giant HD 108202 b · Gas Giant HIP 54597 b · Gas Giant HD 135625 b · Gas Giant HD 185283 b · Gas Giant HD 73256 c · Gas Giant BD-210397 b · Gas Giant HD 94771 b · Gas Giant

Host System: HD 75302

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,697 K — cooler than the Sun (5,778 K)

Estimated Age

2.10 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.941 R☉

Stellar Mass

1.060 M☉

Metallicity [Fe/H]

0.09

Extended Stellar Properties

Surface gravity (log g)

4.495 dex

Stellar density

1.709 g/cm³

Rotational v·sin i

0.46 km/s

Activity index (log R'HK)

-4.620

Metallicity ratio

[M/H]

Distance

30.33 parsec

Light-years 98.92 ly

V-band magnitude

7.45 mag

Voyager-speed travel 1,744,440 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

32.943 mas

Total Proper Motion

160.072 mas/yr

PM Right Ascension

-148.39 mas/yr

PM Declination

60.03 mas/yr

Galactic Cartesian (pc)

x = -0.672 · y = 0.738 · z = 0.061

Equatorial (J2000)

RA 132.30156° · Dec 3.48501°

Galactic ℓ, b

223.974° · 27.670°

Ecliptic λ, β

133.756° · -13.762°

HTM-20 index

1635330939