Key parameters at a glance

A radius of 12.90 Earth radii
A mass of 1,414.34 Earth masses
Surface gravity around 8.50 g
An orbital period of 10,418.000 days
Semi-major axis 10.4000 AU
Distance from Earth 295.32 light-years
Earth Similarity Index 0.424
Travel time at Voyager 1 speed 5,207,909 years

1 sibling around HD 48265

HD 48265 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
HD 48265 b	Gas Giant	12.60	2,351.93	778.510	—	2008
HD 48265 c this	Gas Giant	12.90	1,414.34	10,418.000	—	2026

HD 48265 c Planet Profile

Physical Specs

Radius

12.90 R⊕

Radius (Jupiter)

1.150 R♃

Mass

1,414.34 M⊕

Mass (Jupiter)

4.450 M♃

Density

3.62 g/cm³

Surface Gravity

8.50 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.424

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

#1011of 1771

top 57.0%

This planet

12.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 55696 b 12.90 R⊕ HD 24040 b 12.90 R⊕ BD-210397 c 12.90 R⊕

Metric	Earth	HD 48265 c	Jupiter
Radius (R⊕)	1.00	12.90	11.21
Mass (M⊕)	1.00	1,414.34	317.83
Density (g/cm³)	5.51	3.62	1.33
Surface Gravity (g)	1.00	8.50	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,414.336 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	1,299.918 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 48265

HIP

HIP 31895

TIC

TIC 255781806

Gaia DR2

Gaia DR2 5551551998119947648

Gaia DR3

Gaia DR3 5551551998119947648

System

HD 48265

Percentile among Gas Giant cohort

Radius 12.900 R⊕ · percentile 41 / cohort 1771

Mass 1,414.336 M⊕ · percentile 73 / cohort 1747

Orbital period 10,418.00 d · percentile 96 / cohort 1533

Distance 90.54 pc · percentile 33 / cohort 1759

ESI 0.424 · percentile 92 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

10,418.000 days

Semi-major axis

10.4000 AU

Eccentricity

0.410

Inclination

89.00 °

Year Length

A year here lasts about 28.52 Earth years on a highly eccentric trajectory at a mean orbital distance of 10.4000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.424

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 68475 b · Gas Giant HD 164604 c · Gas Giant HD 100508 b · Gas Giant HD 114386 c · Gas Giant

Host System: HD 48265

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,805 K — hotter than the Sun (5,778 K)

Estimated Age

4.20 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.050 R☉

Stellar Mass

1.380 M☉

Metallicity [Fe/H]

0.39

Extended Stellar Properties

Surface gravity (log g)

4.060 dex

Stellar density

0.167 g/cm³

Systemic radial velocity

23.52 km/s

Rotational v·sin i

3.10 km/s

Rotation period

45.00 days

Metallicity ratio

[Fe/H]

Distance

90.54 parsec

Light-years 295.32 ly

V-band magnitude

8.05 mag

Voyager-speed travel 5,207,909 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

11.016 mas

Total Proper Motion

39.781 mas/yr

PM Right Ascension

26.43 mas/yr

PM Declination

29.74 mas/yr

Galactic Cartesian (pc)

x = -0.115 · y = 0.652 · z = -0.749

Equatorial (J2000)

RA 100.00737° · Dec -48.54183°

Galactic ℓ, b

257.527° · -21.780°

Ecliptic λ, β

110.973° · -71.253°

HTM-20 index

-2120597265