Key parameters at a glance
- A radius of 1.97 Earth radii
- A mass of 4.55 Earth masses
- Surface gravity around 1.17 g
- Semi-major axis 2.2900 AU
- Distance from Earth 18,656.12 light-years
- Earth Similarity Index 0.791
- Travel time at Voyager 1 speed 329,000,714 years
KMT-2021-BLG-1391L b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#38of 1176
top 3.1%
This planet
1.97R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | KMT-2021-BLG-1391L b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.97 | 11.21 |
| Mass (M⊕) | 1.00 | 4.55 | 317.83 |
| Density (g/cm³) | 5.51 | 3.27 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.17 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 4.550 M⊕ | Direct mass measurement (not derived). |
Percentile among Super-Earth 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)
0.791
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Ryu et al. 2022Instrument
18k Mosaic CCD camera
Publication
2022-11
Observation locale
Ground
Discovery cohort
Planets confirmed in 2022 at KMTNet (12 shown).
Host System: KMT-2021-BLG-1391L
Spectral Class
Unknown
Effective Temperature
—
Estimated Age
—
Stellar Radius
—
Stellar Mass
0.370 M☉
Metallicity [Fe/H]
—
Similar Worlds
OGLE-2017-BLG-1434L b
Super-Earth · Unknown
Radius 1.94 R⊕ · 2,804.9 ly
PSR B1257+12 c
Super-Earth · Unknown
Radius 1.91 R⊕ · 1,956.9 ly
KMT-2019-BLG-1367L b
Super-Earth · Unknown
Radius 1.85 R⊕ · 15,231.5 ly
OGLE-2018-BLG-0677L b
Super-Earth · Unknown
Radius 1.82 R⊕ · 24,722.6 ly
PSR B1257+12 d
Super-Earth · Unknown
Radius 1.80 R⊕ · 1,956.9 ly
KMT-2017-BLG-1194L b
Super-Earth · Unknown
Radius 1.70 R⊕ · 13,829.0 ly