Key parameters at a glance

A radius of 13.20 Earth radii
A mass of 807.25 Earth masses
Surface gravity around 4.63 g
An orbital period of 963.000 days
Distance from Earth 119.67 light-years
Earth Similarity Index 0.386
Travel time at Voyager 1 speed 2,110,388 years

HD 41004 A b Planet Profile

Physical Specs

Radius

13.20 R⊕

Radius (Jupiter)

1.180 R♃

Mass

807.25 M⊕

Mass (Jupiter)

2.540 M♃

Density

1.93 g/cm³

Surface Gravity

4.63 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.386

HZ Position Unknown

Controversial No

Discovery

Year 2004

Method Radial Velocity

Facility La Silla Observatory

Telescope 1.2 m Leonhard Euler Telescope

Size rank in cohort

Rank by radius

#847of 1771

top 47.8%

This planet

13.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 12661 c 13.20 R⊕ HD 37605 b 13.20 R⊕ MOA-2009-BLG-387L b 13.20 R⊕

Metric	Earth	HD 41004 A b	Jupiter
Radius (R⊕)	1.00	13.20	11.21
Mass (M⊕)	1.00	807.25	317.83
Density (g/cm³)	5.51	1.93	1.33
Surface Gravity (g)	1.00	4.63	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	807.250 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 41004 A

HIP

HIP 28393 A

TIC

TIC 219152539

System

HD 41004

Percentile among Gas Giant cohort

Radius 13.200 R⊕ · percentile 49 / cohort 1771

Mass 807.250 M⊕ · percentile 62 / cohort 1747

Orbital period 963.00 d · percentile 76 / cohort 1533

Distance 36.69 pc · percentile 11 / cohort 1759

ESI 0.386 · percentile 81 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

963.000 days

Semi-major axis

— AU

Eccentricity

0.740

Inclination

— °

Year Length

A year here lasts about 2.64 Earth years on a highly eccentric trajectory.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.386

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Zucker et al. 2004

Instrument

CORALIE Spectrograph

Publication

2004-11

Observation locale

Ground

Discovery cohort

Planets confirmed in 2004 at La Silla Observatory (3 shown).

HD 202206 c · Gas Giant HD 160691 d · Sub-Neptune HD 330075 b · Gas Giant

Host System: HD 41004 A

Spectral Class

K-type orange

Effective Temperature

5,310 K — cooler than the Sun (5,778 K)

Estimated Age

0.22 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.850 R☉

Stellar Mass

0.950 M☉

Metallicity [Fe/H]

0.23

Extended Stellar Properties

Surface gravity (log g)

4.370 dex

Systemic radial velocity

42.51 km/s

Rotational v·sin i

2.00 km/s

Metallicity ratio

[Fe/H]

Distance

36.69 parsec

Light-years 119.67 ly

V-band magnitude

8.65 mag

Voyager-speed travel 2,110,388 yr

Multi-band Host Photometry — 10 bands

Astrometric Data

Parallax

27.255 mas

Total Proper Motion

78.007 mas/yr

PM Right Ascension

-42.65 mas/yr

PM Declination

65.32 mas/yr

Galactic Cartesian (pc)

x = 0.001 · y = 0.666 · z = -0.746

Equatorial (J2000)

RA 89.95660° · Dec -48.23942°

Galactic ℓ, b

255.488° · -28.196°

Ecliptic λ, β

89.904° · -71.679°

HTM-20 index

-1840592795

Observation Record

Photometric series

RV measurements

Archive notes

Similar Worlds

KMT-2024-BLG-1209L b

Gas Giant · K-type orange

Radius 13.20 R⊕ · 12,817.9 ly

HD 37605 b

Gas Giant · K-type orange

Radius 13.20 R⊕ · 152.6 ly

OGLE-2003-BLG-235L b

Gas Giant · K-type orange

Radius 13.20 R⊕ · 18,917.0 ly

HD 1502 b

Gas Giant · K-type orange

Radius 13.20 R⊕ · 622.8 ly

HD 12661 c

Gas Giant · K-type orange

Radius 13.20 R⊕ · 123.4 ly

HD 181342 b

Gas Giant · K-type orange

Radius 13.20 R⊕ · 392.7 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries La Silla Observatory Mission K-type orange Hosts