Key parameters at a glance

A radius of 12.50 Earth radii
A mass of 3,178.28 Earth masses
Surface gravity around 20.34 g
An orbital period of 1,535.000 days
Semi-major axis 2.6550 AU
Distance from Earth 124.54 light-years
Earth Similarity Index 0.384
Travel time at Voyager 1 speed 2,196,310 years

HD 106252 b Planet Profile

Physical Specs

Radius

12.50 R⊕

Radius (Jupiter)

1.110 R♃

Mass

3,178.28 M⊕

Mass (Jupiter)

10.000 M♃

Density

8.94 g/cm³

Surface Gravity

20.34 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.384

HZ Position Unknown

Controversial No

Discovery

Year 2002

Method Radial Velocity

Facility Lick Observatory

Telescope 3.0 m C. Donald Shane Telescope

Size rank in cohort

Rank by radius

#1235of 1771

top 69.7%

This planet

12.50R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 156279 c 12.50 R⊕ HD 33283 b 12.50 R⊕ HD 156279 b 12.50 R⊕

Metric	Earth	HD 106252 b	Jupiter
Radius (R⊕)	1.00	12.50	11.21
Mass (M⊕)	1.00	3,178.28	317.83
Density (g/cm³)	5.51	8.94	1.33
Surface Gravity (g)	1.00	20.34	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	3,178.284 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	2,288.365 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 106252

HIP

HIP 59610

TIC

TIC 397558558

Gaia DR2

Gaia DR2 3905603054348141440

Gaia DR3

Gaia DR3 3905603054348141440

System

HD 106252

Percentile among Gas Giant cohort

Radius 12.500 R⊕ · percentile 28 / cohort 1771

Mass 3,178.284 M⊕ · percentile 88 / cohort 1747

Orbital period 1,535.00 d · percentile 82 / cohort 1533

Distance 38.19 pc · percentile 13 / cohort 1759

ESI 0.384 · percentile 81 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,535.000 days

Semi-major axis

2.6550 AU

Eccentricity

0.480

Inclination

46.00 °

Year Length

A year here lasts about 4.20 Earth years on a highly eccentric trajectory at a mean orbital distance of 2.6550 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.384

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

Fischer et al. 2002

Instrument

Hamilton Echelle Spectrograph

Publication

2002-05

Observation locale

Ground

Discovery cohort

Planets confirmed in 2002 at Lick Observatory (3 shown).

HD 50554 b · Gas Giant 55 Cnc d · Gas Giant iot Dra b · Gas Giant

Host System: HD 106252

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,874 K — hotter than the Sun (5,778 K)

Estimated Age

3.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.050 R☉

Stellar Mass

1.050 M☉

Metallicity [Fe/H]

-0.06

Extended Stellar Properties

Surface gravity (log g)

4.360 dex

Stellar density

1.070 g/cm³

Systemic radial velocity

15.40 km/s

Rotational v·sin i

1.90 km/s

Activity index (log R'HK)

-4.850

Metallicity ratio

[Fe/H]

Distance

38.19 parsec

Light-years 124.54 ly

V-band magnitude

7.41 mag

Voyager-speed travel 2,196,310 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

26.160 mas

Total Proper Motion

280.941 mas/yr

PM Right Ascension

22.86 mas/yr

PM Declination

-280.01 mas/yr

Galactic Cartesian (pc)

x = -0.983 · y = -0.058 · z = 0.174

Equatorial (J2000)

RA 183.37306° · Dec 10.04043°

Galactic ℓ, b

273.505° · 70.712°

Ecliptic λ, β

179.052° · 10.545°

HTM-20 index

-704667524

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes