Confirmed Exoplanet Discovered 2008

1RXS J160929.1-210524 b

A gas giant orbiting the k-type orange 1RXS J160929.1-210524, located approximately 453.8 light-years from Earth.

Key parameters at a glance

  • A radius of 18.65 Earth radii
  • A mass of 3,000.00 Earth masses
  • Surface gravity around 8.63 g
  • Semi-major axis 330.0000 AU
  • Equilibrium temperature 1,700 K (1427 °C)
  • Distance from Earth 453.80 light-years
  • Earth Similarity Index 0.081
  • Travel time at Voyager 1 speed 8,002,712 years

1RXS J160929.1-210524 b Planet Profile

Physical Specs

Radius
18.65 R⊕
Radius (Jupiter)
1.664 R♃
Mass
3,000.00 M⊕
Mass (Jupiter)
8.000 M♃
Density
2.54 g/cm³
Surface Gravity
8.63 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.081
HZ Position Unknown
Controversial No

Discovery

Year 2008
Method Imaging
Facility Gemini Observatory
Telescope 8.19 m Gemini North Telescope

Size rank in cohort

Rank by radius

#51of 1771

top 2.8%

This planet

18.65R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

TOI-2886 b 18.64 R⊕ HAT-P-69 b 18.79 R⊕ bet Pic b 18.49 R⊕
Metric Earth 1RXS J160929.1-210524 b Jupiter
Radius (R⊕)1.0018.6511.21
Mass (M⊕)1.003,000.00317.83
Density (g/cm³)5.512.541.33
Surface Gravity (g)1.008.632.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 3,000.000 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 48964101

Gaia DR2

Gaia DR2 6243841249531772800

Gaia DR3

Gaia DR3 6243841249531772800

System

1RXS J160929.1-210524

Percentile among Gas Giant cohort

Radius 18.647 R⊕ · percentile 97 / cohort 1771
Mass 3,000.000 M⊕ · percentile 86 / cohort 1747
Distance 139.14 pc · percentile 42 / cohort 1759
ESI 0.081 · percentile 19 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
— days
Semi-major axis
330.0000 AU
Eccentricity
—
Inclination
— °

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

1,700K

(1427 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.081

0 = alien, 1 = Earth-identical

Insufficient insolation data — the dayside is scorched.

Discovery Paper

Primary reference

Lafreniere et al. 2008

Instrument

NIRI Camera

Publication

2008-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2008 at Gemini Observatory (2 shown).

HR 8799 b · Gas Giant HR 8799 c · Gas Giant

Host System: 1RXS J160929.1-210524

Spectral Class

K-type orange

Effective Temperature

4,060 K — cooler than the Sun (5,778 K)

Estimated Age

0.01 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.313 R☉

Stellar Mass

0.850 M☉

Metallicity [Fe/H]

—

Distance
139.14 parsec
Light-years 453.80 ly
V-band magnitude
12.62 mag
Voyager-speed travel 8,002,712 yr

Multi-band Host Photometry — 11 bands

8.514.214.17B12.62V12.06Gaia11.19TESS9.82J9.12H8.92K8.79W18.79W28.68W38.53W4

Astrometric Data

Parallax

7.159 mas

Total Proper Motion

25.377 mas/yr

PM Right Ascension

-10.27 mas/yr

PM Declination

-23.20 mas/yr

Galactic Cartesian (pc)

x = -0.433 · y = -0.827 · z = -0.360

Equatorial (J2000)

RA 242.37623° · Dec -21.08314°

Galactic ℓ, b

352.891° · 22.030°

Ecliptic λ, β

244.362° · -0.069°

HTM-20 index

-737729472

Similar Worlds

WISPIT 2 b

Gas Giant · K-type orange

Radius 17.93 R⊕ · 440.0 ly

WISPIT 2 c

Gas Giant · K-type orange

Radius 17.93 R⊕ · 440.0 ly

WASP-177 b

Gas Giant · K-type orange

Radius 17.71 R⊕ · 576.7 ly

TOI-2669 b

Gas Giant · K-type orange

Radius 19.73 R⊕ · 1,283.2 ly

GSC 06214-00210 b

Gas Giant · K-type orange

Radius 20.18 R⊕ · 353.9 ly

TOI-5143 c

Gas Giant · K-type orange

Radius 16.25 R⊕ · 591.6 ly

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