Confirmed Exoplanet Discovered 2008

FU Tau b

A gas giant orbiting the m-type red dwarf FU Tau, located approximately 435.4 light-years from Earth.

Key parameters at a glance

  • A radius of 12.20 Earth radii
  • A mass of 5,085.28 Earth masses
  • Surface gravity around 34.17 g
  • Semi-major axis 800.0000 AU
  • Equilibrium temperature 2,375 K (2102 °C)
  • Distance from Earth 435.40 light-years
  • Earth Similarity Index 0.050
  • Travel time at Voyager 1 speed 7,678,316 years

FU Tau b Planet Profile

Physical Specs

Radius
12.20 R⊕
Radius (Jupiter)
1.090 R♃
Mass
5,085.28 M⊕
Mass (Jupiter)
16.000 M♃
Density
15.40 g/cm³
Surface Gravity
34.17 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.050
HZ Position Unknown
Controversial No

Discovery

Year 2008
Method Imaging
Facility Spitzer Space Telescope
Telescope 0.85 m Spitzer Space Telescope

Size rank in cohort

Rank by radius

#1410of 1771

top 79.6%

This planet

12.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 168443 c 12.20 R⊕ HIP 5158 c 12.20 R⊕ HD 220074 b 12.20 R⊕
Metric Earth FU Tau b Jupiter
Radius (R⊕)1.0012.2011.21
Mass (M⊕)1.005,085.28317.83
Density (g/cm³)5.5115.401.33
Surface Gravity (g)1.0034.172.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 5,085.280 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 58544613

Gaia DR2

Gaia DR2 149629483705467008

Gaia DR3

Gaia DR3 149629483705467008

System

FU Tau

Percentile among Gas Giant cohort

Radius 12.200 R⊕ · percentile 19 / cohort 1771
Mass 5,085.280 M⊕ · percentile 95 / cohort 1747
Distance 133.50 pc · percentile 41 / cohort 1759
ESI 0.050 · percentile 4 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
— days
Semi-major axis
800.0000 AU
Eccentricity
—
Inclination
— °

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

2,375K

(2102 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.050

0 = alien, 1 = Earth-identical

Insufficient insolation data — the dayside is scorched.

Discovery Paper

Primary reference

Luhman et al. 2009

Instrument

IRAC Infrared Array Camera

Publication

2009-02

Observation locale

Space

Host System: FU Tau

Spectral Class

M-type red dwarf

Effective Temperature

2,838 K — cooler than the Sun (5,778 K)

Estimated Age

0.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

—

Stellar Mass

0.050 M☉

Metallicity [Fe/H]

—

Distance
133.50 parsec
Light-years 435.40 ly
V-band magnitude
— mag
Voyager-speed travel 7,678,316 yr

Multi-band Host Photometry — 15 bands

4.619.519.50U18.13B15.24Gaia13.78TESS18.73Sloan g16.86Sloan r14.74Sloan i13.06Sloan z10.78J9.95H9.32K8.60W17.82W26.07W34.60W4

Astrometric Data

Parallax

7.491 mas

Total Proper Motion

25.100 mas/yr

PM Right Ascension

12.40 mas/yr

PM Declination

-21.80 mas/yr

Galactic Cartesian (pc)

x = 0.370 · y = 0.827 · z = 0.423

Equatorial (J2000)

RA 65.89750° · Dec 25.05067°

Galactic ℓ, b

172.114° · -16.961°

Ecliptic λ, β

68.243° · 3.413°

HTM-20 index

854535176

Similar Worlds

ROXs 12 b

Gas Giant · M-type red dwarf

Radius 12.20 R⊕ · 445.7 ly

HD 112300 b

Gas Giant · M-type red dwarf

Radius 12.20 R⊕ · 202.5 ly

HD 220074 b

Gas Giant · M-type red dwarf

Radius 12.20 R⊕ · 1,058.5 ly

2MASS J03590986+2009361 b

Gas Giant · M-type red dwarf

Radius 12.20 R⊕ · 383.0 ly

KOINTREAU-4 b

Gas Giant · M-type red dwarf

Radius 12.20 R⊕ · 474.3 ly

USco1621 b

Gas Giant · M-type red dwarf

Radius 12.20 R⊕ · 449.8 ly

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