Confirmed Exoplanet Discovered 2017

Luhman 16 b

A gas giant orbiting the unknown Luhman 16 A, located approximately Distance pending from Earth.

Key parameters at a glance

  • A radius of 11.90 Earth radii
  • A mass of 9,344.16 Earth masses
  • Surface gravity around 65.99 g
  • An orbital period of 9,697.000 days
  • Semi-major axis 3.5200 AU
  • Earth Similarity Index 0.246

Luhman 16 b Planet Profile

Physical Specs

Radius
11.90 R⊕
Radius (Jupiter)
1.060 R♃
Mass
9,344.16 M⊕
Mass (Jupiter)
29.400 M♃
Density
30.50 g/cm³
Surface Gravity
65.99 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.246
HZ Position Unknown
Controversial No

Discovery

Year 2017
Method Imaging
Facility Multiple Observatories
Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#1526of 1771

top 86.1%

This planet

11.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

2MASS J22501512+2325342 b 11.90 R⊕ KMT-2020-BLG-0414L c 11.90 R⊕ DENIS-P J082303.1-491201 b 11.90 R⊕
Metric Earth Luhman 16 b Jupiter
Radius (R⊕)1.0011.9011.21
Mass (M⊕)1.009,344.16317.83
Density (g/cm³)5.5130.501.33
Surface Gravity (g)1.0065.992.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 9,344.155 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 119862115

Gaia DR2

Gaia DR2 5353625852001928960

Gaia DR3

Gaia DR3 5353625852001928960

System

Luhman 16

Percentile among Gas Giant cohort

Radius 11.900 R⊕ · percentile 13 / cohort 1771
Mass 9,344.155 M⊕ · percentile 100 / cohort 1747
Orbital period 9,697.00 d · percentile 95 / cohort 1533
ESI 0.246 · percentile 43 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
9,697.000 days
Semi-major axis
3.5200 AU
Eccentricity
0.344
Inclination
79.92 °

Year Length

A year here lasts about 26.55 Earth years on a highly eccentric trajectory at a mean orbital distance of 3.5200 AU.

Eq. Temperature

—

 

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.246

0 = alien, 1 = Earth-identical

Detection Signatures

Radial velocity

Stellar wobble has been measured spectroscopically.

Astrometry

Positional wobble of the host star was measured.

Direct imaging

The planet has been imaged directly (rare).

Discovery Paper

Primary reference

Garcia et al. 2017

Instrument

Multiple Instruments

Publication

2017-09

Observation locale

Ground

Discovery cohort

Planets confirmed in 2017 at Multiple Observatories (12 shown).

GJ 625 b · Super-Earth TRAPPIST-1 e · Rocky Terrestrial TRAPPIST-1 f · Rocky Terrestrial TRAPPIST-1 g · Rocky Terrestrial TRAPPIST-1 h · Rocky Terrestrial HD 34445 e · Neptune-like BD+03 2562 b · Gas Giant HD 111591 b · Gas Giant HD 34445 d · Neptune-like MOA-2012-BLG-006L b · Gas Giant HD 76920 b · Gas Giant HD 34445 f · Neptune-like

Host System: Luhman 16 A

Spectral Class

Unknown

Effective Temperature

—

Estimated Age

—

Stellar Radius

—

Stellar Mass

0.034 M☉

Metallicity [Fe/H]

—

Multi-band Host Photometry — 5 bands

8.819.516.44B19.51TESS10.73J9.56H8.84K

Similar Worlds

2MASS J11011926-7732383 b

Gas Giant · Unknown

Radius 11.90 R⊕ · —

KMT-2018-BLG-0885L b

Gas Giant · Unknown

Radius 11.90 R⊕ · 22,472.1 ly

KMT-2020-BLG-0414L c

Gas Giant · Unknown

Radius 11.90 R⊕ · 3,979.1 ly

MXB 1658-298 b

Gas Giant · Unknown

Radius 12.00 R⊕ · —

UCAC4 328-061594 b

Gas Giant · Unknown

Radius 12.10 R⊕ · 130.2 ly

KMT-2021-BLG-1770L b

Gas Giant · Unknown

Radius 12.10 R⊕ · 22,570.0 ly

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