Key parameters at a glance

A radius of 12.70 Earth radii
A mass of 1,999.15 Earth masses
Surface gravity around 12.39 g
An orbital period of 1,120.000 days
Semi-major axis 2.2000 AU
Distance from Earth 279.49 light-years
Earth Similarity Index 0.442
Travel time at Voyager 1 speed 4,928,810 years

Context from the literature

HD 2039 b is an extrasolar planet orbiting the star HD 2039. It is almost five times as massive as Jupiter and has a very eccentric orbit.

Excerpted from Wikipedia · full article

HD 2039 b Planet Profile

Physical Specs

Radius

12.70 R⊕

Radius (Jupiter)

1.140 R♃

Mass

1,999.15 M⊕

Mass (Jupiter)

6.290 M♃

Density

5.36 g/cm³

Surface Gravity

12.39 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.442

HZ Position Unknown

Controversial No

Discovery

Year 2002

Method Radial Velocity

Facility Anglo-Australian Telescope

Telescope 3.9 m Anglo-Australian Telescope

Size rank in cohort

Rank by radius

#1130of 1771

top 63.7%

This planet

12.70R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 168863 b 12.70 R⊕ HD 233604 b 12.70 R⊕ Kepler-424 c 12.70 R⊕

Metric	Earth	HD 2039 b	Jupiter
Radius (R⊕)	1.00	12.70	11.21
Mass (M⊕)	1.00	1,999.15	317.83
Density (g/cm³)	5.51	5.36	1.33
Surface Gravity (g)	1.00	12.39	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,999.151 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 2039

HIP

HIP 1931

TIC

TIC 281461362

Gaia DR2

Gaia DR2 4919009555730599936

Gaia DR3

Gaia DR3 4919009555730599936

System

HD 2039

Percentile among Gas Giant cohort

Radius 12.700 R⊕ · percentile 34 / cohort 1771

Mass 1,999.151 M⊕ · percentile 80 / cohort 1747

Orbital period 1,120.00 d · percentile 79 / cohort 1533

Distance 85.69 pc · percentile 32 / cohort 1759

ESI 0.442 · percentile 98 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,120.000 days

Semi-major axis

2.2000 AU

Eccentricity

0.710

Inclination

— °

Year Length

A year here lasts about 3.07 Earth years on a highly eccentric trajectory at a mean orbital distance of 2.2000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.442

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Tinney et al. 2003

Instrument

UCLES Spectrograph

Publication

2003-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2002 at Anglo-Australian Telescope (5 shown).

HD 196050 b · Gas Giant HD 216437 b · Gas Giant HD 30177 b · Gas Giant HD 216435 b · Gas Giant HD 76700 b · Neptune-like

Host System: HD 2039

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,945 K — hotter than the Sun (5,778 K)

Estimated Age

6.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.190 R☉

Stellar Mass

1.230 M☉

Metallicity [Fe/H]

0.30

Extended Stellar Properties

Surface gravity (log g)

4.380 dex

Stellar density

0.952 g/cm³

Systemic radial velocity

8.40 km/s

Rotational v·sin i

3.25 km/s

Metallicity ratio

[Fe/H]

Distance

85.69 parsec

Light-years 279.49 ly

V-band magnitude

9.00 mag

Voyager-speed travel 4,928,810 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

11.641 mas

Total Proper Motion

79.785 mas/yr

PM Right Ascension

78.45 mas/yr

PM Declination

14.51 mas/yr

Galactic Cartesian (pc)

x = 0.547 · y = 0.058 · z = -0.835

Equatorial (J2000)

RA 6.08511° · Dec -56.64999°

Galactic ℓ, b

310.403° · -60.083°

Ecliptic λ, β

332.974° · -52.146°

HTM-20 index

-673767318

Observation Record

Photometric series

RV measurements

Archive notes

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