Key parameters at a glance
- A radius of 5.19 Earth radii
- A mass of 23.50 Earth masses
- Surface gravity around 0.87 g
- Semi-major axis 2.3600 AU
- Distance from Earth 21,200.14 light-years
- Earth Similarity Index 0.466
- Travel time at Voyager 1 speed 373,864,448 years
KMT-2017-BLG-1057L b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#359of 574
top 62.4%
This planet
5.19R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | KMT-2017-BLG-1057L b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 5.19 | 11.21 |
| Mass (M⊕) | 1.00 | 23.50 | 317.83 |
| Density (g/cm³) | 5.51 | 0.92 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.87 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 23.500 M⊕ | Direct mass measurement (not derived). |
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
Orbital period for this planet has not yet been measured.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.466
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Gui et al. 2024Instrument
18k Mosaic CCD camera
Publication
2024-08
Observation locale
Ground
Discovery cohort
Planets confirmed in 2024 at KMTNet (12 shown).
Host System: KMT-2017-BLG-1057L
Spectral Class
Unknown
Effective Temperature
—
Estimated Age
—
Stellar Radius
—
Stellar Mass
0.570 M☉
Metallicity [Fe/H]
—
Similar Worlds
MOA-2008-BLG-310L b
Neptune-like · Unknown
Radius 5.18 R⊕ · 25,114.0 ly
KMT-2021-BLG-2294L b
Neptune-like · Unknown
Radius 5.02 R⊕ · 22,178.6 ly
KMT-2021-BLG-0736L b
Neptune-like · Unknown
Radius 4.86 R⊕ · 22,830.9 ly
OGLE-2015-BLG-0966L b
Neptune-like · Unknown
Radius 4.86 R⊕ · 10,763.1 ly
OGLE-2018-BLG-0516L b
Neptune-like · Unknown
Radius 4.73 R⊕ · 22,830.9 ly
OGLE-2007-BLG-368L b
Neptune-like · Unknown
Radius 4.72 R⊕ · 19,243.2 ly