horizontal (altitude, azimuth) to equatorial (right ascension, declination)
Please provide values below to convert horizontal (altitude, azimuth) to equatorial (right ascension, declination), or change ↔.
horizontal (altitude, azimuth)
Definition: A local coordinate system used in astronomy, with the observer's horizon as the reference plane, and positions defined by altitude (angle above the horizon) and azimuth (angle measured from the North).
Historyandorigin: Used for centuries by navigators and astronomers, the horizontal system is based on the observer's location on Earth.
CurrentUse: Commonly used in telescopes, and for ground-based astronomical observations and navigation.
funfact: The horizontal coordinate system is easy to use for local observations, as it is tied directly to the observer's horizon!
equatorial (right ascension, declination)
Definition: A celestial coordinate system used to locate stars and other celestial objects, based on the Earth's celestial equator and the vernal equinox.
Historyandorigin: Originated from the ancient Greeks and was formalized by Hipparchus and Ptolemy. It was later refined by the International Astronomical Union in the early 20th century.
CurrentUse: Commonly used by astronomers for star mapping and locating celestial bodies in the sky.
funfact: The equatorial system is sometimes referred to as the 'astronomical coordinate system' because of its widespread use in astronomy!
horizontal (altitude, azimuth) to equatorial (right ascension, declination) Conversion Table
| 1 horizontal (altitude, azimuth) | 0.000001 equatorial (right ascension, declination) |
| 2 horizontal (altitude, azimuth) | 0.000002 equatorial (right ascension, declination) |
| 3 horizontal (altitude, azimuth) | 0.000003 equatorial (right ascension, declination) |
| 5 horizontal (altitude, azimuth) | 0.000005 equatorial (right ascension, declination) |
| 10 horizontal (altitude, azimuth) | 0.00001 equatorial (right ascension, declination) |
| 50 horizontal (altitude, azimuth) | 0.00005 equatorial (right ascension, declination) |
| 100 horizontal (altitude, azimuth) | 0.0001 equatorial (right ascension, declination) |
| 1000 horizontal (altitude, azimuth) | 0.001 equatorial (right ascension, declination) |
| 10000 horizontal (altitude, azimuth) | 0.01 equatorial (right ascension, declination) |
| 100000 horizontal (altitude, azimuth) | 0.1 equatorial (right ascension, declination) |
| 1000000 horizontal (altitude, azimuth) | 1 equatorial (right ascension, declination) |
How to Convert horizontal (altitude, azimuth) to equatorial (right ascension, declination)
1 horizontal (altitude, azimuth) = 0.000001 equatorial (right ascension, declination)
1 equatorial (right ascension, declination) = 1000000 horizontal (altitude, azimuth)
we use cross multiplication method
horizontal (altitude, azimuth) → equatorial (right ascension, declination)
1 → 0.000001
1.5 → ?( suppose x)
=>1.5*0.000001=1*x
by simplifying
x=0.0000015