hour angle

Also found in: Thesaurus, Acronyms, Encyclopedia, Wikipedia.

hour angle

n. Abbr. ha

The angular distance, measured westward along the celestial equator, between the celestial meridian of the observer and the hour circle passing through a celestial body.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

hour angle

(Astronomy) the angular distance along the celestial equator from the meridian of the observer to the hour circle of a particular celestial body

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

hour′ an`gle

the angle, measured westward through 360°, between the celestial meridian of an observer and the hour circle of a celestial body.

[1830–40]

ThesaurusAntonymsRelated WordsSynonymsLegend:

Switch to new thesaurus

Noun	1.	hour angle - the angular distance along the celestial equator from the observer's meridian to the hour circle of a given celestial body distance - the property created by the space between two objects or points
	2.	hour angle - (astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day HA astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole angular distance - the angular separation between two objects as perceived by an observer; "he recorded angular distances between the stars"

Translations

angolo orario

Mentioned in ?

References in periodicals archive ?

The solar hour angle w can be calculated from the following:

Exergy Analysis of Two Kinds of Solar-Driven Cogeneration Systems in Lhasa, Tibet, China

This equals the solar hour angle of 38[degrees] which means that the flat plate solar collector does not start working before 10 am in the morning and after 4 pm during the month of January.

EPDM based double slope triangular enclosure solar collector: a novel approach

By this stage in your program the ephemeris hour angle H of the computed geographical longitude [lambda] will have been found.

The speed of the lunar shadow on Earth during solar eclipses

For this, you need the Local Hour Angle (LHA), which is simply the GHA minus your longitude (for the Western Hemisphere).

IFR by the sun and stars: not that long ago crews flew thousands of miles with no navigational aids except the sky itself. It's such an elegant solution

The hour angle at sunrise or sunset on an inclined surface [omega]st will be lesser than the value obtained by equation.

SWOT analysis and power productivity estimation through solar radiation assessment

Daily extraterrestrial radiation on a horizontal surface H0 can be calculated as a function of the solar constant ([I.sub.sc]), the latitude of the site ([lambda]), the eccentricity correction factor of the Earth's orbit ([E.sub.0]), the solar declination ([delta]) and the mean sunrise hour angle ([w.sub.s]); using the equation

Estimation of global solar radiation in Venezuela/ Estimacion de la radiacion solar global en Venezuela/Estimacao da radiacao solar global em Venezuela

The direct radiation is empirical established depending on the extraterrestrial radiation, the medium solar constant, the day number during a year, the distortion factor, the solar altitude angle, the solar declination, the latitude angle, the solar hour angle, and the local solar time.

Improving the energetic efficiency of the photovoltaic arrays using mechatronic solar trackers

In Figure 10, angle T is the hour angle measured from the north-south line around the equatorial dial.