﻿ First the equatorial coordinate system

# First the equatorial coordinate system

First the equatorial coordinate system - one of the systems of celestial coordinates. In this system, the main plane is the plane of the celestial equator. One of coordinates with a declination δ (rarely - polar distance p)
Another coordinate may be:.
hour angle t (in the first coordinate system equatorial)
right ascension (equatorial second coordinate system )
system
declination δ luminary celestial meridian is called the arc of the celestial equator to the luminary, or the angle between the plane of the celestial equator and the direction of light.
decline is measured in the range from 0 ° to 90 ° towards the north pole of the world and from 0 ° to -90 ° in the direction of the south pole of the world.
Polar distance Tew p luminary called declination circle arc from the north pole to the luminary world, or the angle between the axis of the world and the direction of light.
polar distance is measured in the range of 0 ° to 180 ° in the direction from the north pole to the south of the world.
hour angle t luminary called arc celestial equator from the top of the celestial equator (i.e., the point of intersection with the celestial equator celestial meridian) to declination circle luminaries or dihedral angle between the plane of the celestial meridian and around the declination luminary.
Time vug minutes expelled towards the diurnal rotation of the celestial sphere, that is to the west from the top of the celestial equator, in the range from 0 ° to 360 ° (in degrees) or 0 to 24 hours (in a clockwise least). Sometimes hour angles measured in the range from 0 ° to 180 ° (from 0 g to 12 g) to the west and from 0 ° to -180 ° (0 g to -12 g) to the east.
See. also
second equatorial coordinate system
Sources
astronomical encyclopedia

g p n

Celestial Mechanics
Newton's laws | The law of gravity | Kepler's laws | Two-body problem | Three-body problem | The gravitational N-body problem | Bertrand | Kepler's equation

celestial sphere celestial coordinate system: • horizontal • galactic equatorial first second equatorial • • ekliptychaya | International Celestial Reference System | The spherical coordinate system | That is the world | The Celestial Equator | Right ascension | Declination | ecliptic | equinox | solstice | The fundamental plane of the orbit parameters

Kepleravy orbital elements: eccentricity of the semi-major axis • • • mean anomaly of ascending node longitude • perytsentra argument | Apatsentr and perytsentr | Orbital speed | orbital node | Epoch

movement of celestial bodies
movement of the sun and planets on the celestial sphere | Efemerydy | Configurations of the planets: the confrontation • Area • parade of planets | the culmination | Sidereal period | Orbital resonance | The rotation period | Advance equinoxes | Synodic period | convergence | Eclipse: eclipse lunar eclipse • • • Saras metonym cycle | coating | flow | Libratsyya | Elangatsyya | The effect of code | Effect Yarkovskiy | Zhanibekava effect
Spaceflight
escape velocity: the first (circular) • Two (parabolic) • • Third quarter |
Tsiolkovsky rocket equation | Gravity assist | Gomanavskaya trajectory | Method askulyuyuchyh elements | Tidal acceleration | orbit inclination change | dock | Lagrange Points | "Pioneer" effect
orbits of satellites into geostationary orbit
| Heliocentric orbit | Geosynchronous orbit | Geocentric orbit | Geaperahodnaya orbit | Low carrier orbit | Polar orbit | Tundra-orbit | Sun-synchronous orbit | Lightning-orbit |

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