Hour angle

Hour angle

The angular distance of a celestial object measured westward along the celestial equator from the zenith crossing. In effect, HA represents the RA for a particular location and time of day.

This is auto-generated content. You can help to improve it.

0 0

Improve it

Add an image

Part of Speech: noun
Synonym(s):
Blossary:
Industry/Domain: Aerospace
Category: Space flight
Company: NASA
Product:
Acronym-Abbreviation:

Collect to Blossary

Other Languages:

Related terms

hour angle

Aerospace; Space flight

The angular distance of a celestial object measured westward along the celestial equator from the zenith crossing. In effect, HA represents the RA for a particular location and ...

hour-angle coordinate system

Earth science; Mapping science

An equatorial coordinate system (1) which has the plane of the equator and the plane of the local meridian as its geometric elements. A point in both planes is specified as the ...

ephemeris hour angle

Earth science; Mapping science

An hour angle referred to the ephemeris meridian.

sidereal hour angle

Earth science; Mapping science

The angle, expressed in degrees and measured westwards, from the plane of the hour circle passing through the vernal equinox to the plane of the hour circle passing through a ...

local hour angle

Earth science; Mapping science

The angle, measured westwards, from the plane of the local celestial meridian to the plane of the hour circle passing through the celestial body being observed. It may also be ...

hour-angle method of determining azimuth

Earth science; Mapping science

Any method which involves measuring the horizontal angle between a celestial body and the point whose azimuth is to be determined, and adding this to the azimuth of the celestial ...

lunar probe

Aerospace; Space flight

A lunar probe is a scientific space exploration mission in which a man-made spacecraft is sent into the Moon orbital space. China launched its latest lunar probe, the Chang'e-2, ...

estimated approach time

Aerospace; Space flight

The time at which air traffic control (ATC) expects that an arriving aircraft following a delay will leave the holding point.

Discovery

Aerospace; Space flight

The oldest of NASA's three surviving space shuttles, Discovery’s maiden voyage was in 1984. It made both return-to-flight missions following the Challenger and Columbia disasters, ...

Kwant 2

Aerospace; Space flight

Kwant 2 was a module of the Soviet space station MIR.

Kwant

Aerospace; Space flight

Kwant was a module of the Soviet space station MIR.

Laika

Aerospace; Space flight

Laika was a dog that was sent to space by the Soviet Union. She is the first animal that was sent to space.

Terms in the News

Featured Terms

Harry8L

0
Terms
0
Blossaries
1
Followers

Industry/Domain: Games Category: Computer games

Diablo III

Diablo III is the third instalment in the Diablo franchise that pioneered the internet gaming experience some 16 years ago with its visually advanced ...