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  • noun

Synonyms for arcsec

the inverse function of the secant

References in periodicals archive ?
Results of initial testing of the instruments show that (though more thorough testing is needed) the standard deviation of less than 1 arcsec can be achieved.
5 arcsec and, importantly, he repeated it after several years.
The primary of this double is a 5th magnitude yellow star, while its companion is a blue-white 7th magnitude star 134 arcsec away.
8 with a diameter of around 25 arcsec it will be immediately obvious, even in quite a small telescope, as a greenish-blue slightly out of focus star, and if the atmosphere is steady allowing high power to be used, it will appear slightly elongated.
5 arcsec, though as he illustrates 1 arcsec or better has been achieved.
6 to 15 GHz and the spatial resolution will be 1 to 60 arcsec at 1420 MHz, depending on the maximum baseline lengths.
Mars was just beginning its apparition and some good images had already been received although the planet was only 6 arcsec diameter.
His ultraviolet images were all made between May 25 and July 20, when the planet's apparent diameter was about 10 arcsec.
3) Denisenko noted that NN Cam has sometimes, including in a recent paper by Khruslov, (4) been mistaken for another star about 8 arcsec to the east, USNO-A2.
It has a quoted diameter of 400 arcsec and a visual magnitude of12.