Confirmed Exoplanet Discovered 2023

KMT-2021-BLG-1105L b

A gas giant orbiting the unknown KMT-2021-BLG-1105L, located approximately 14,807.5 light-years from Earth.

Key parameters at a glance

  • A radius of 13.60 Earth radii
  • A mass of 413.18 Earth masses
  • Surface gravity around 2.23 g
  • Semi-major axis 3.5400 AU
  • Distance from Earth 14,807.48 light-years
  • Earth Similarity Index 0.331
  • Travel time at Voyager 1 speed 261,129,938 years

KMT-2021-BLG-1105L b Planet Profile

Physical Specs

Radius
13.60 R⊕
Radius (Jupiter)
1.220 R♃
Mass
413.18 M⊕
Mass (Jupiter)
1.300 M♃
Density
0.90 g/cm³
Surface Gravity
2.23 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.331
HZ Position Unknown
Controversial No

Discovery

Year 2023
Method Microlensing
Facility KMTNet
Telescope 1.6 m wide-field telescope

Size rank in cohort

Rank by radius

#609of 1771

top 34.3%

This planet

13.60R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Metric Earth KMT-2021-BLG-1105L b Jupiter
Radius (R⊕)1.0013.6011.21
Mass (M⊕)1.00413.18317.83
Density (g/cm³)5.510.901.33
Surface Gravity (g)1.002.232.53
Insolation (S⊕)1.000.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 413.177 M⊕ Direct mass measurement (not derived).

Percentile among Gas Giant cohort

Radius 13.600 R⊕ · percentile 63 / cohort 1771
Mass 413.177 M⊕ · percentile 43 / cohort 1747
Distance 4,540.00 pc · percentile 93 / cohort 1759
ESI 0.331 · percentile 65 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
days
Semi-major axis
3.5400 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)

0.331

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Ryu et al. 2023

Instrument

18k Mosaic CCD camera

Publication

2023-03

Observation locale

Ground

Host System: KMT-2021-BLG-1105L

Spectral Class

Unknown

Effective Temperature

Estimated Age

Stellar Radius

Stellar Mass

0.630 M☉

Metallicity [Fe/H]

Distance
4,540.00 parsec
Light-years 14,807.48 ly
V-band magnitude
mag
Voyager-speed travel 261,129,938 yr

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