KMT-2021-BLG-1689L b
KMT-2021-BLG-1689L b is a Neptune-like planet orbiting KMT-2021-BLG-1689L in the constellation Sagittarius. It lies about 23,483 light-years from Earth and was discovered in 2022 using the microlensing method.
Is KMT-2021-BLG-1689L b in the Habitable Zone?
The position of KMT-2021-BLG-1689L b relative to the habitable zone of KMT-2021-BLG-1689L cannot be precisely determined from the available orbital data.
Orbit and Year Length
KMT-2021-BLG-1689L b orbits at an average distance of 2.500 AU.
How Was KMT-2021-BLG-1689L b Discovered?
KMT-2021-BLG-1689L b was discovered in 2022 using the microlensing method, with observations from KMTNet.
Gravitational microlensing detects a planet when its host star passes in front of a more distant background star, and the planet's gravity adds a brief, telltale spike to the magnified starlight. It can find planets thousands of light-years away.
How Far Away Is KMT-2021-BLG-1689L b?
KMT-2021-BLG-1689L b is 23,483.2 light-years (7,200.0 parsecs) from Earth. Light arriving here tonight left the planet about 23,483 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 413,304,320 years to make the journey.
The Host Star: KMT-2021-BLG-1689L
KMT-2021-BLG-1689L
- Surface temperature
- 4,570 K (Sun: 5,772 K)
- Mass
- 0.58 M☉
Planetary System
KMT-2021-BLG-1689L b is the only planet known to orbit KMT-2021-BLG-1689L so far.
KMT-2021-BLG-1689L b — Complete Data
| Mass | 46.00 Earth masses (0.145 Jupiter masses) |
|---|---|
| Orbital distance | 2.500 AU |
| Distance from Earth | 23,483.2 light-years (7,200.0 parsecs) |
| Constellation | Sagittarius |
| Discovery method | Microlensing |
| Discovery facility | KMTNet |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2022-08-23. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About KMT-2021-BLG-1689L b
Is KMT-2021-BLG-1689L b habitable?
KMT-2021-BLG-1689L b is not known to orbit within the habitable zone of KMT-2021-BLG-1689L, and as a Neptune-like planet it is an unlikely candidate for life as we know it.
How far away is KMT-2021-BLG-1689L b?
KMT-2021-BLG-1689L b is about 23,483 light-years from Earth in the constellation Sagittarius. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 413,304,320 years to get there.
Explore KMT-2021-BLG-1689L b in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
