Confirmed Exoplanet Discovered 2008

USco CTIO 108 b

A gas giant orbiting the m-type red dwarf USco CTIO 108, located approximately 469.7 light-years from Earth.

Key parameters at a glance

  • A radius of 12.30 Earth radii
  • A mass of 4,449.62 Earth masses
  • Surface gravity around 29.41 g
  • Semi-major axis 670.0000 AU
  • Distance from Earth 469.73 light-years
  • Earth Similarity Index 0.338
  • Travel time at Voyager 1 speed 8,283,628 years

USco CTIO 108 b Planet Profile

Physical Specs

Radius
12.30 R⊕
Radius (Jupiter)
1.100 R♃
Mass
4,449.62 M⊕
Mass (Jupiter)
14.000 M♃
Density
13.10 g/cm³
Surface Gravity
29.41 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.338
HZ Position Unknown
Controversial No

Discovery

Year 2008
Method Imaging
Facility Teide Observatory
Telescope 4.20 m William Herschel Telescope

Size rank in cohort

Rank by radius

#1349of 1771

top 76.1%

This planet

12.30R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HAT-P-13 c 12.30 R⊕ HD 22781 b 12.30 R⊕ CHXR 73 b 12.30 R⊕
Metric Earth USco CTIO 108 b Jupiter
Radius (R⊕)1.0012.3011.21
Mass (M⊕)1.004,449.62317.83
Density (g/cm³)5.5113.101.33
Surface Gravity (g)1.0029.412.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 4,449.620 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 48666170

Gaia DR2

Gaia DR2 6249068843209158784

Gaia DR3

Gaia DR3 6249068843209158784

System

USco CTIO 108

Percentile among Gas Giant cohort

Radius 12.300 R⊕ · percentile 22 / cohort 1771
Mass 4,449.620 M⊕ · percentile 93 / cohort 1747
Distance 144.02 pc · percentile 43 / cohort 1759
ESI 0.338 · percentile 67 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
— days
Semi-major axis
670.0000 AU
Eccentricity
—
Inclination
— °

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

—

 

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.338

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

B Eacute Jar et al. 2008

Instrument

ACAM Auxiliary Port Camera

Publication

2008-02

Observation locale

Ground

Host System: USco CTIO 108

Spectral Class

M-type red dwarf

Effective Temperature

2,700 K — cooler than the Sun (5,778 K)

Estimated Age

0.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.345 R☉

Stellar Mass

0.060 M☉

Metallicity [Fe/H]

—

Distance
144.02 parsec
Light-years 469.73 ly
V-band magnitude
— mag
Voyager-speed travel 8,283,628 yr

Multi-band Host Photometry — 11 bands

7.621.121.08B17.42Gaia15.77TESS15.65Ic13.42J12.84H12.51K12.13W111.69W29.63W37.56W4

Astrometric Data

Parallax

6.931 mas

Total Proper Motion

22.984 mas/yr

PM Right Ascension

-10.16 mas/yr

PM Declination

-20.62 mas/yr

Galactic Cartesian (pc)

x = -0.453 · y = -0.834 · z = -0.314

Equatorial (J2000)

RA 241.47527° · Dec -18.31242°

Galactic ℓ, b

354.470° · 24.539°

Ecliptic λ, β

243.009° · 2.494°

HTM-20 index

-1071828756

Similar Worlds

USco1556 b

Gas Giant · M-type red dwarf

Radius 12.30 R⊕ · 458.7 ly

Oph 11 b

Gas Giant · M-type red dwarf

Radius 12.30 R⊕ · 444.1 ly

HIP 81208 C b

Gas Giant · M-type red dwarf

Radius 12.30 R⊕ · 481.2 ly

2MASS J01033563-5515561 AB b

Gas Giant · M-type red dwarf

Radius 12.30 R⊕ · 153.9 ly

CHXR 73 b

Gas Giant · M-type red dwarf

Radius 12.30 R⊕ · 620.9 ly

GJ 676 A c

Gas Giant · M-type red dwarf

Radius 12.30 R⊕ · 52.3 ly

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