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arcsec::noun | Spocien Dictionary
| Type | Words |
|---|---|
| Synonyms | arc secant, arcsecant, inverse secant |
| Type of | circular function, trigonometric function |
Examples of arcsec
arcsec
It brightens from mag 0.7 to 0.2 and swells from 7 to 9 arcsec in diameter.
From the guardian.co.uk
Less than 5 arcsec wide, it is too small to excite telescopic interest.
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Jupiter's disc is 47 arcsec wide when the planet lies alongside the Moon on the night of the 16th.
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Its cloud-banded disc is 37 arcsec wide at mid-month.
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Its current diameter of 38 arcsec is big enough for small telescopes to show its changeable cloud bands.
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Mars, though, is only 4 arcsec wide at present, so glimpsing any detail at all is a real challenge.
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The Moon lies below Saturn on the next night, when the planet's disc and rings measure 18 and 41 arcsec wide respectively.
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Through a telescope, its phase changes between 28% and 76% sunlit as its diameter shrinks from 8.5 to 5.9 arcsec.
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At opposition, Jupiter is 594 million km distant and shows a cloud-banded 50 arcsec disc through almost any telescope.
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- Arc secant: the inverse function of the secant; the angle that has a secant equal to a given number
