Key parameters at a glance

A radius of 12.80 Earth radii
A mass of 1,639.99 Earth masses
Surface gravity around 10.01 g
An orbital period of 7,832.000 days
Semi-major axis 7.2700 AU
Distance from Earth 109.03 light-years
Earth Similarity Index 0.433
Travel time at Voyager 1 speed 1,922,796 years

HD 68475 b Planet Profile

Physical Specs

Radius

12.80 R⊕

Radius (Jupiter)

1.150 R♃

Mass

1,639.99 M⊕

Mass (Jupiter)

5.160 M♃

Density

4.30 g/cm³

Surface Gravity

10.01 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.433

HZ Position Unknown

Controversial No

Discovery

Year 2026

Method Radial Velocity

Facility Las Campanas Observatory

Telescope 6.5 m Magellan II Clay 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 68475 b	Jupiter
Radius (R⊕)	1.00	12.80	11.21
Mass (M⊕)	1.00	1,639.99	317.83
Density (g/cm³)	5.51	4.30	1.33
Surface Gravity (g)	1.00	10.01	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,639.995 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	1,557.359 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 68475

HIP

HIP 40051

TIC

TIC 80995687

Gaia DR2

Gaia DR2 5521268527328372096

Gaia DR3

Gaia DR3 5521268527328372096

System

HD 68475

Percentile among Gas Giant cohort

Radius 12.800 R⊕ · percentile 37 / cohort 1771

Mass 1,639.995 M⊕ · percentile 76 / cohort 1747

Orbital period 7,832.00 d · percentile 95 / cohort 1533

Distance 33.43 pc · percentile 9 / cohort 1759

ESI 0.433 · percentile 95 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

7,832.000 days

Semi-major axis

7.2700 AU

Eccentricity

0.620

Inclination

87.00 °

Year Length

A year here lasts about 21.44 Earth years on a highly eccentric trajectory at a mean orbital distance of 7.2700 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.433

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

Wu et al. 2026

Instrument

Carnegie Planet Finder Spectrograph

Publication

2026-03

Observation locale

Ground

Discovery cohort

Planets confirmed in 2026 at Las Campanas Observatory (4 shown).

HD 48265 c · Gas Giant HD 164604 c · Gas Giant HD 100508 b · Gas Giant HD 114386 c · Gas Giant

Host System: HD 68475

Spectral Class

K-type orange

Effective Temperature

5,022 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.791 R☉

Stellar Mass

0.830 M☉

Metallicity [Fe/H]

0.07

Extended Stellar Properties

Surface gravity (log g)

4.560 dex

Stellar density

2.364 g/cm³

Metallicity ratio

[Fe/H]

Distance

33.43 parsec

Light-years 109.03 ly

V-band magnitude

8.78 mag

Voyager-speed travel 1,922,796 yr

Multi-band Host Photometry — 7 bands

Astrometric Data

Parallax

29.885 mas

Total Proper Motion

342.642 mas/yr

PM Right Ascension

21.64 mas/yr

PM Declination

-341.96 mas/yr

Galactic Cartesian (pc)

x = -0.397 · y = 0.617 · z = -0.680

Equatorial (J2000)

RA 122.71926° · Dec -42.81288°

Galactic ℓ, b

259.092° · -5.054°

Ecliptic λ, β

143.262° · -60.346°

HTM-20 index

388956652

Similar Worlds

HD 99706 c

Gas Giant · K-type orange

Radius 12.80 R⊕ · 478.1 ly

HD 135872 b

Gas Giant · K-type orange

Radius 12.80 R⊕ · 268.8 ly

WASP-132 d

Gas Giant · K-type orange

Radius 12.80 R⊕ · 400.9 ly

gam Lib c

Gas Giant · K-type orange

Radius 12.80 R⊕ · 154.6 ly

HD 240210 b

Gas Giant · K-type orange

Radius 12.80 R⊕ · 1,214.6 ly

WISPIT 1 c

Gas Giant · K-type orange

Radius 12.80 R⊕ · 750.2 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Las Campanas Observatory Mission K-type orange Hosts