Key parameters at a glance

A radius of 12.10 Earth radii
A mass of 5,838.29 Earth masses
Surface gravity around 39.88 g
An orbital period of 1.328 days
Distance from Earth 135.52 light-years
Earth Similarity Index 0.302
Travel time at Voyager 1 speed 2,389,880 years
Almost certainly tidally locked to its host star given the close orbit

HD 41004 B b Planet Profile

Physical Specs

Radius

12.10 R⊕

Radius (Jupiter)

1.080 R♃

Mass

5,838.29 M⊕

Mass (Jupiter)

18.370 M♃

Density

18.10 g/cm³

Surface Gravity

39.88 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.302

HZ Position Unknown

Controversial No

Discovery

Year 2003

Method Radial Velocity

Facility La Silla Observatory

Telescope 1.2 m Leonhard Euler Telescope

Size rank in cohort

Rank by radius

#1454of 1771

top 82.0%

This planet

12.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 62364 b 12.10 R⊕ HD 106515 A b 12.10 R⊕ BD+20 2457 b 12.10 R⊕

Metric	Earth	HD 41004 B b	Jupiter
Radius (R⊕)	1.00	12.10	11.21
Mass (M⊕)	1.00	5,838.29	317.83
Density (g/cm³)	5.51	18.10	1.33
Surface Gravity (g)	1.00	39.88	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	5,838.290 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 41004 B

HIP

HIP 28393 B

TIC

TIC 734710085

Gaia DR2

Gaia DR2 4794830231453653888

Gaia DR3

Gaia DR3 4794830231453653888

System

HD 41004

Percentile among Gas Giant cohort

Radius 12.100 R⊕ · percentile 16 / cohort 1771

Mass 5,838.290 M⊕ · percentile 95 / cohort 1747

Orbital period 1.33 d · percentile 2 / cohort 1533

Distance 41.55 pc · percentile 15 / cohort 1759

ESI 0.302 · percentile 59 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1.328 days

Semi-major axis

— AU

Eccentricity

0.081

Inclination

— °

Year Length

A year here lasts approximately 1.33 Earth days (0.4% of a terrestrial year) on a nearly circular orbit.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.302

0 = alien, 1 = Earth-identical

Insufficient insolation data. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Zucker et al. 2003

Instrument

CORALIE Spectrograph

Publication

2003-06

Observation locale

Ground

Discovery cohort

Planets confirmed in 2003 at La Silla Observatory (11 shown).

HD 169830 c · Gas Giant HD 111232 b · Gas Giant HD 82943 c · Gas Giant HD 142415 b · Gas Giant HD 82943 b · Gas Giant HD 121504 b · Gas Giant HD 114386 b · Gas Giant HD 19994 b · Gas Giant HD 65216 b · Gas Giant HD 216770 b · Gas Giant HD 6434 b · Gas Giant

Host System: HD 41004 B

Spectral Class

M-type red dwarf

Effective Temperature

5,036 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.041 R☉

Stellar Mass

0.400 M☉

Metallicity [Fe/H]

—

Extended Stellar Properties

Surface gravity (log g)

4.327 dex

Stellar density

1.049 g/cm³

Systemic radial velocity

41.70 km/s

Distance

41.55 parsec

Light-years 135.52 ly

V-band magnitude

8.61 mag

Voyager-speed travel 2,389,880 yr

Multi-band Host Photometry — 8 bands

Astrometric Data

Parallax

24.044 mas

Total Proper Motion

72.679 mas/yr

PM Right Ascension

-41.52 mas/yr

PM Declination

59.65 mas/yr

Galactic Cartesian (pc)

x = 0.001 · y = 0.666 · z = -0.746

Equatorial (J2000)

RA 89.95660° · Dec -48.23941°

Galactic ℓ, b

255.488° · -28.196°

Ecliptic λ, β

89.904° · -71.679°

HTM-20 index

-1840592795

Similar Worlds

UCAC3 113-933 b

Gas Giant · M-type red dwarf

Radius 12.10 R⊕ · 171.5 ly

HD 18438 b

Gas Giant · M-type red dwarf

Radius 12.10 R⊕ · 731.1 ly

LP 261-75 b

Gas Giant · M-type red dwarf

Radius 12.10 R⊕ · 110.7 ly

2MASS J11550485-7919108 b

Gas Giant · M-type red dwarf

Radius 12.10 R⊕ · 329.0 ly

Gaia-5 b

Gas Giant · M-type red dwarf

Radius 12.10 R⊕ · 134.3 ly

ROXs 12 b

Gas Giant · M-type red dwarf

Radius 12.20 R⊕ · 445.7 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries La Silla Observatory Mission M-type red dwarf Hosts