heliometer(redirected from heliometrical)
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A telescope equipped to measure small angular distances between celestial bodies or the angular sizes of celestial bodies.
he′li·o·met′ric (-ə-mĕt′rĭk), he′li·o·met′ri·cal adj.
(Astronomy) a refracting telescope having a split objective lens that is used to determine very small angular distances between celestial bodies
heliometric, ˌhelioˈmetrical adj
he•li•om•e•ter(ˌhi liˈɒm ɪ tər)
a telescope with a divided, adjustable objective, formerly used to measure small angular distances, as those between celestial bodies.
he`li•o•met′ric (-əˈmɛ trɪk) he`li•o•met′ri•cal, adj.
an instrument originally designed for measuring the sun’s diameter, now used for measuring the angular distance between stars.See also: Astronomy, Instruments
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|Noun||1.||heliometer - an instrument used to measure the angular separation of two stars that are too far apart to be included in the field of view of an ordinary telescope|