Confirmed Exoplanet Discovered 2018

KMT-2017-BLG-0165L b

A neptune-like orbiting the unknown KMT-2017-BLG-0165L, located approximately 14,774.9 light-years from Earth.

Key parameters at a glance

  • A radius of 6.45 Earth radii
  • A mass of 34.00 Earth masses
  • Surface gravity around 0.82 g
  • Semi-major axis 3.4500 AU
  • Distance from Earth 14,774.87 light-years
  • Earth Similarity Index 0.407
  • Travel time at Voyager 1 speed 260,554,761 years

KMT-2017-BLG-0165L b Planet Profile

Physical Specs

Radius
6.45 R⊕
Radius (Jupiter)
0.575 R♃
Mass
34.00 M⊕
Mass (Jupiter)
0.110 M♃
Density
0.70 g/cm³
Surface Gravity
0.82 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.407
HZ Position Unknown
Controversial No

Discovery

Year 2018
Method Microlensing
Facility KMTNet
Telescope 1.6 m wide-field telescope

Size rank in cohort

Rank by radius

#243of 574

top 42.2%

This planet

6.45R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Metric Earth KMT-2017-BLG-0165L b Jupiter
Radius (R⊕)1.006.4511.21
Mass (M⊕)1.0034.00317.83
Density (g/cm³)5.510.701.33
Surface Gravity (g)1.000.822.53
Insolation (S⊕)1.000.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 34.000 M⊕ Direct mass measurement (not derived).

Percentile among Neptune-like cohort

Radius 6.450 R⊕ · percentile 58 / cohort 574
Mass 34.000 M⊕ · percentile 56 / cohort 574
Distance 4,530.00 pc · percentile 93 / cohort 572
ESI 0.407 · percentile 75 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period
days
Semi-major axis
3.4500 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)

0.407

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Jung et al. 2019

Instrument

18k Mosaic CCD camera

Publication

2019-02

Observation locale

Ground

Host System: KMT-2017-BLG-0165L

Spectral Class

Unknown

Effective Temperature

Estimated Age

Stellar Radius

Stellar Mass

0.760 M☉

Metallicity [Fe/H]

Distance
4,530.00 parsec
Light-years 14,774.87 ly
V-band magnitude
mag
Voyager-speed travel 260,554,761 yr

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