Key parameters at a glance
- A radius of 2.23 Earth radii
- A mass of 5.59 Earth masses
- Surface gravity around 1.12 g
- Semi-major axis 1.8100 AU
- Distance from Earth 17,612.42 light-years
- Earth Similarity Index 0.745
- Travel time at Voyager 1 speed 310,595,080 years
KMT-2017-BLG-0428L b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1622of 1978
top 82.0%
This planet
2.23R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | KMT-2017-BLG-0428L b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.23 | 11.21 |
| Mass (M⊕) | 1.00 | 5.59 | 317.83 |
| Density (g/cm³) | 5.51 | 2.77 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.12 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 5.590 M⊕ | Direct mass measurement (not derived). |
Percentile among Sub-Neptune 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)
0.745
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Zang et al. 2023Instrument
18k Mosaic CCD camera
Publication
2023-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2023 at KMTNet (12 shown).
Host System: KMT-2017-BLG-0428L
Spectral Class
Unknown
Effective Temperature
—
Estimated Age
—
Stellar Radius
—
Stellar Mass
0.340 M☉
Metallicity [Fe/H]
—
Similar Worlds
KMT-2018-BLG-1988L b
Sub-Neptune · Unknown
Radius 2.22 R⊕ · 13,535.5 ly
OGLE-2005-BLG-390L b
Sub-Neptune · Unknown
Radius 2.21 R⊕ · 21,526.3 ly
OGLE-2017-BLG-1806L b
Sub-Neptune · Unknown
Radius 2.15 R⊕ · 20,874.0 ly
KMT-2017-BLG-1003L b
Sub-Neptune · Unknown
Radius 2.13 R⊕ · 23,124.5 ly
KMT-2018-BLG-1025L b
Sub-Neptune · Unknown
Radius 2.34 R⊕ · 21,868.8 ly
OGLE-2018-BLG-0532L b
Sub-Neptune · Unknown
Radius 2.37 R⊕ · 2,521.2 ly