7 Planets Found by Mauna Kea Observatory (2018-2026)
7 confirmed exoplanets have been identified for the Mauna Kea Observatory facility. First confirmed in 2018; most recent in 2026.
Median radius
2.83 R⊕
Median mass
8.39 M⊕
Median distance
40.70 ly
Median ESI
0.66
Discovery Timeline
Composition Breakdown
Sub-Neptune
3
42.9%
Super-Earth
2
28.6%
Gas Giant
2
28.6%
Most Earth-like in this Cohort
ESI 0.885
GJ 4274 b
Super-Earth · 1.53 R⊕ · 23.6 ly
ESI 0.848
55 Cnc B b
Super-Earth · 1.69 R⊕ · 40.7 ly
ESI 0.757
55 Cnc B c
Sub-Neptune · 2.16 R⊕ · 40.7 ly
ESI 0.660
GJ 4274 c
Sub-Neptune · 2.83 R⊕ · 23.6 ly
ESI 0.660
Gl 410 b
Sub-Neptune · 2.83 R⊕ · 38.9 ly
ESI 0.363
2MASS J0249-0557 c
Gas Giant · 12.40 R⊕ · 215.5 ly
Cohort Extremes
Closest to Earth
GJ 4274 b
Largest radius
UKIRT-2017-BLG-001L b
Most massive
2MASS J0249-0557 c
Full Catalogue
| Planet | Host | Type | Year | Radius (R⊕) | Mass (M⊕) | Distance (ly) | ESI |
|---|---|---|---|---|---|---|---|
| GJ 4274 b | GJ 4274 | Super-Earth | 2026 | 1.53 | 2.97 | 23.6 | 0.885 |
| 55 Cnc B b | 55 Cnc B | Super-Earth | 2025 | 1.69 | 3.50 | 40.7 | 0.848 |
| 55 Cnc B c | 55 Cnc B | Sub-Neptune | 2025 | 2.16 | 5.30 | 40.7 | 0.757 |
| GJ 4274 c | GJ 4274 | Sub-Neptune | 2026 | 2.83 | 8.39 | 23.6 | 0.660 |
| Gl 410 b | Gl 410 | Sub-Neptune | 2025 | 2.83 | 8.40 | 38.9 | 0.660 |
| 2MASS J0249-0557 c | 2MASS J0249-0557 A | Gas Giant | 2018 | 12.40 | 3,686.81 | 215.5 | 0.363 |
| UKIRT-2017-BLG-001L b | UKIRT-2017-BLG-001L | Gas Giant | 2018 | 13.70 | 407.00 | 20,547.8 | 0.328 |