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HA

HA

2 9.9
The angle measured west along the sky's equator from the local north–south line to a star
  • noun
  • Specialized
translation icon : ángulo horario
  • Currently, wetlands are treated with an aqueous solution containing 2.2 kg/ha glyphosate and 1% volume/volume of surfactant.
  • hectare (ha)
  • kg ha
  • million ha

Examples

  • Using approximate 2011 prices, this tank mix would cost about $12/ha plus application costs.

    Academic text (2011)
  • To observe solar prominences, astronomers often use a filter designed for Ha light.

  • There is an area of more than 20 million ha available for irrigated agriculture in Turkey.

    Academic text (2015)
  • Today, each family has a total of approximately 2 ha planted in Arabica and Robusta coffee.

    Academic text (2017)
  • A single hectare (ha) of tropical forest typically contains well over 100 species of trees.

    Academic text (2012)
  • The negotiations involved purchasing some 30 ha of land from a community for $2,200 per hectare.

    Academic text (2017)
  • Fuerabamba consists of approximately 500 families and occupies an area of 8,660 ha in the district of Challhuahuacho.

    Academic text (2017)
  • The western study area is 1,841 ha (4,550 ac) in size and is composed of 87 management units.

    Academic text (2017)
  • The concession area measures 35,000 ha, with an investment of approximately $4,230 million (Xstrata n.d.a.).

    Academic text (2017)
  • Therefore, growers must anticipate an average of 950 blackbirds/ha ($95/ha/$0.10/year) of cattails to justify the treatment costs.

    Academic text (2011)

Synonyms

hour angle
vsHA
  • Specialized
9.6

A distance along the sky's equator from your north-south line to a star

is the abbreviated form used in technical or shorthand astronomy contexts

Surface Forms

HA singular
HAs plural

Etymology

HA is short for hour and angle, so it means 'hour angle'. Think of it as an angle that moves with the hours on a clock, and that is why astronomers use HA to tell where a star is in the sky.