Key parameters at a glance

A radius of 12.40 Earth radii
A mass of 3,786.61 Earth masses
Surface gravity around 24.63 g
An orbital period of 1,535.119 days
Semi-major axis 2.6940 AU
Distance from Earth 169.61 light-years
Earth Similarity Index 0.360
Travel time at Voyager 1 speed 2,991,019 years

HD 23596 b Planet Profile

Physical Specs

Radius

12.40 R⊕

Radius (Jupiter)

1.100 R♃

Mass

3,786.61 M⊕

Mass (Jupiter)

11.914 M♃

Density

10.90 g/cm³

Surface Gravity

24.63 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.360

HZ Position Unknown

Controversial No

Discovery

Year 2003

Method Radial Velocity

Facility Haute-Provence Observatory

Telescope 1.93 m Telescope

Size rank in cohort

Rank by radius

#1298of 1771

top 73.2%

This planet

12.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 110014 b 12.40 R⊕ CFBDSIR J145829+101343 b 12.40 R⊕ MOA-2010-BLG-073L b 12.40 R⊕

Metric	Earth	HD 23596 b	Jupiter
Radius (R⊕)	1.00	12.40	11.21
Mass (M⊕)	1.00	3,786.61	317.83
Density (g/cm³)	5.51	10.90	1.33
Surface Gravity (g)	1.00	24.63	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	3,786.608 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	2,450.370 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 23596

HIP

HIP 17747

TIC

TIC 201266092

Gaia DR2

Gaia DR2 224870885460646016

Gaia DR3

Gaia DR3 224870885460646016

System

HD 23596

Percentile among Gas Giant cohort

Radius 12.400 R⊕ · percentile 25 / cohort 1771

Mass 3,786.608 M⊕ · percentile 90 / cohort 1747

Orbital period 1,535.12 d · percentile 82 / cohort 1533

Distance 52.00 pc · percentile 21 / cohort 1759

ESI 0.360 · percentile 73 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,535.119 days

Semi-major axis

2.6940 AU

Eccentricity

0.282

Inclination

38.90 °

Year Length

A year here lasts about 4.20 Earth years on a mildly elliptical path at a mean orbital distance of 2.6940 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.360

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

Perrier et al. 2003

Instrument

ELODIE Spectrograph

Publication

2003-11

Observation locale

Ground

Discovery cohort

Planets confirmed in 2003 at Haute-Provence Observatory (3 shown).

HD 74156 c · Gas Giant HD 74156 b · Gas Giant HD 190360 b · Gas Giant

Host System: HD 23596

Spectral Class

F-type yellow-white

Effective Temperature

6,040 K — hotter than the Sun (5,778 K)

Estimated Age

5.68 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.530 R☉

Stellar Mass

1.100 M☉

Metallicity [Fe/H]

0.33

Extended Stellar Properties

Surface gravity (log g)

4.230 dex

Stellar density

0.395 g/cm³

Systemic radial velocity

-10.03 km/s

Rotational v·sin i

4.20 km/s

Activity index (log R'HK)

-5.060

Metallicity ratio

[Fe/H]

Distance

52.00 parsec

Light-years 169.61 ly

V-band magnitude

7.26 mag

Voyager-speed travel 2,991,019 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

19.201 mas

Total Proper Motion

57.130 mas/yr

PM Right Ascension

53.01 mas/yr

PM Declination

21.31 mas/yr

Galactic Cartesian (pc)

x = 0.414 · y = 0.637 · z = 0.650

Equatorial (J2000)

RA 57.00186° · Dec 40.53073°

Galactic ℓ, b

155.552° · -10.900°

Ecliptic λ, β

63.853° · 20.039°

HTM-20 index

33812096

Observation Record

Photometric series

RV measurements

Archive notes