L1
E722104
L1 is the first Sun–Earth Lagrange point, a position in space where the gravitational forces of the Sun and Earth balance to allow a spacecraft to maintain a stable orbit between them.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Lagrange point
ⓘ
Sun–Earth Lagrange point ⓘ location in space ⓘ |
| alsoKnownAs |
SE-L1
ⓘ
Sun–Earth L1 NERFINISHED ⓘ |
| belongsTo | five Sun–Earth Lagrange points ⓘ |
| coordinateSystem | often described in barycentric rotating coordinates ⓘ |
| distanceFromEarth |
about 0.01 astronomical units toward the Sun
ⓘ
about 1.5 million kilometers toward the Sun ⓘ |
| distanceFromSun | about 0.99 astronomical units ⓘ |
| governedBy |
Newtonian gravity with perturbations
ⓘ
restricted three-body problem ⓘ |
| hasNeighbor |
Sun–Earth L2
NERFINISHED
ⓘ
Sun–Earth L3 NERFINISHED ⓘ |
| hasOrbitType |
Lissajous orbit
NERFINISHED
ⓘ
halo orbit ⓘ |
| hasOrdinalNumber | 1 ⓘ |
| hasPosition | between the Sun and the Earth ⓘ |
| hasProperty |
allows spacecraft to maintain a quasi-stable orbit
ⓘ
collinear with the Sun and the Earth ⓘ continuous line of sight to both Sun and Earth ⓘ enables continuous view of the Sun ⓘ fixed position in rotating Sun–Earth frame ⓘ gravitational forces of Sun and Earth approximately balance ⓘ inside Earth’s orbit around the Sun ⓘ low-light interference from Earth and Moon compared to low Earth orbit ⓘ not fixed in inertial frame ⓘ on the Sun–Earth line ⓘ requires precise navigation for insertion into halo or Lissajous orbit ⓘ requires station-keeping maneuvers ⓘ |
| locatedIn | Sun–Earth system NERFINISHED ⓘ |
| monitors |
interplanetary magnetic field near Earth
ⓘ
solar wind ⓘ |
| referenceFrame | rotating frame co-rotating with Earth around the Sun ⓘ |
| relevantTo |
astrodynamics
ⓘ
mission design for solar observatories ⓘ space weather forecasting infrastructure ⓘ |
| spacecraftLocatedAt |
ACE
NERFINISHED
ⓘ
DSCOVR NERFINISHED ⓘ Genesis (past mission) NERFINISHED ⓘ SOHO NERFINISHED ⓘ Wind NERFINISHED ⓘ |
| stabilityType | unstable equilibrium point ⓘ |
| usedFor |
early warning of solar storms
ⓘ
heliophysics research ⓘ solar observation ⓘ space weather monitoring ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.