Key parameters at a glance
- A radius of 13.20 Earth radii
- A mass of 839.07 Earth masses
- Surface gravity around 4.82 g
- Semi-major axis 2.5100 AU
- Distance from Earth 12,817.93 light-years
- Earth Similarity Index 0.388
- Travel time at Voyager 1 speed 226,044,197 years
KMT-2024-BLG-1209L b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#847of 1771
top 47.8%
This planet
13.20R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | KMT-2024-BLG-1209L b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.20 | 11.21 |
| Mass (M⊕) | 1.00 | 839.07 | 317.83 |
| Density (g/cm³) | 5.51 | 2.00 | 1.33 |
| Surface Gravity (g) | 1.00 | 4.82 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 839.067 M⊕ | Direct mass measurement (not derived). |
Percentile among Gas Giant 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)
0.388
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Han et al. 2025Instrument
18k Mosaic CCD camera
Publication
2025-07
Observation locale
Ground
Discovery cohort
Planets confirmed in 2025 at KMTNet (12 shown).
Host System: KMT-2024-BLG-1209L
Spectral Class
K-type orange
Effective Temperature
—
Estimated Age
—
Stellar Radius
—
Stellar Mass
0.770 M☉
Metallicity [Fe/H]
—
Similar Worlds
HD 37605 b
Gas Giant · K-type orange
Radius 13.20 R⊕ · 152.6 ly
OGLE-2003-BLG-235L b
Gas Giant · K-type orange
Radius 13.20 R⊕ · 18,917.0 ly
HD 1502 b
Gas Giant · K-type orange
Radius 13.20 R⊕ · 622.8 ly
HD 12661 c
Gas Giant · K-type orange
Radius 13.20 R⊕ · 123.4 ly
HD 181342 b
Gas Giant · K-type orange
Radius 13.20 R⊕ · 392.7 ly
HD 145457 b
Gas Giant · K-type orange
Radius 13.20 R⊕ · 441.3 ly