Besselian elements
E579587
Besselian elements are mathematical parameters introduced by Friedrich Bessel that precisely describe the geometry and timing of a solar eclipse as seen from Earth.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical calculation method
ⓘ
set of mathematical parameters ⓘ solar eclipse prediction tool ⓘ |
| appliesTo |
Earth-based observations of solar eclipses
ⓘ
solar eclipses ⓘ |
| basedOn |
celestial mechanics
ⓘ
spherical astronomy ⓘ |
| calculatedIn | fundamental plane of the eclipse ⓘ |
| coordinateSystem |
Earth-fixed geographic coordinates
ⓘ
fundamental plane coordinates ⓘ |
| describes |
motion of the Moon’s shadow across Earth
ⓘ
path of annularity of a solar eclipse ⓘ path of totality of a solar eclipse ⓘ |
| enables |
calculation of contact times for a solar eclipse
ⓘ
calculation of eclipse duration at a given location ⓘ calculation of local eclipse magnitude ⓘ |
| field |
astrometry
ⓘ
astronomy ⓘ celestial mechanics ⓘ |
| hasComponent |
Greenwich hour angle of the Sun
ⓘ
coordinates of the shadow axis in the fundamental plane ⓘ declination of the Sun ⓘ lunar ephemeris parameters ⓘ radius of the penumbral cone ⓘ radius of the umbral cone ⓘ rate of change of the shadow axis coordinates ⓘ right ascension of the Sun ⓘ solar ephemeris parameters ⓘ time of greatest eclipse ⓘ |
| historicallyIntroducedBy | Friedrich Bessel NERFINISHED ⓘ |
| namedAfter | Friedrich Bessel NERFINISHED ⓘ |
| output |
geocentric eclipse circumstances
ⓘ
topocentric eclipse circumstances ⓘ |
| relatedTo |
Bessel’s method for eclipses
NERFINISHED
ⓘ
eclipse maps ⓘ |
| requires |
precise ephemerides of the Moon
ⓘ
precise ephemerides of the Sun ⓘ |
| timeDependent | true ⓘ |
| usedBy |
astronomers
ⓘ
eclipse calculators ⓘ organizations publishing eclipse predictions ⓘ |
| usedFor |
computing local eclipse circumstances on Earth
ⓘ
describing the geometry of a solar eclipse ⓘ describing the timing of a solar eclipse ⓘ predicting solar eclipses ⓘ |
| usedIn |
astronomical almanacs
ⓘ
eclipse bulletins ⓘ nautical almanacs ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.