Key parameters at a glance
- A radius of 6.90 Earth radii
- A mass of 38.14 Earth masses
- Surface gravity around 0.80 g
- Semi-major axis 0.7200 AU
- Distance from Earth 25,048.78 light-years
- Earth Similarity Index 0.390
- Travel time at Voyager 1 speed 441,735,225 years
KMT-2021-BLG-1554L b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#211of 574
top 36.6%
This planet
6.90R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | KMT-2021-BLG-1554L b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 6.90 | 11.21 |
| Mass (M⊕) | 1.00 | 38.14 | 317.83 |
| Density (g/cm³) | 5.51 | 0.64 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.80 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 38.139 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)
0.390
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Han et al. 2022Instrument
18k Mosaic CCD camera
Publication
2022-08
Observation locale
Ground
Discovery cohort
Planets confirmed in 2022 at KMTNet (12 shown).
Host System: KMT-2021-BLG-1554L
Spectral Class
Unknown
Effective Temperature
—
Estimated Age
—
Stellar Radius
—
Stellar Mass
0.080 M☉
Metallicity [Fe/H]
—
Similar Worlds
KMT-2021-BLG-0712L b
Neptune-like · Unknown
Radius 6.91 R⊕ · 10,078.2 ly
KMT-2023-BLG-0735L b
Neptune-like · Unknown
Radius 6.97 R⊕ · 20,841.4 ly
OGLE-2019-BLG-1492L b
Neptune-like · Unknown
Radius 6.79 R⊕ · 18,264.7 ly
KMT-2023-BLG-0469L b
Neptune-like · Unknown
Radius 7.04 R⊕ · 23,059.2 ly
KMT-2021-BLG-0192L b
Neptune-like · Unknown
Radius 6.56 R⊕ · 16,699.2 ly
KMT-2017-BLG-0165L b
Neptune-like · Unknown
Radius 6.45 R⊕ · 14,774.9 ly