arcsec
- noun
- /ˈɑrkˌsɛk/
- Specialized
- PHOTO (COLOR): The central 1.5 arcsec x 1.5 arcsec of the Milky Way Galaxy.
- resolution of arcsec
- about arcsec
Examples
-
The image has a full-width, half-maximum resolution of 0.15 arcsec after deconvolution, which further enhances its quality.
Academic text (1994) -
The field of view is 12.8 x 12.8 arcsec, corresponding to about 10 x 10 light years.
Academic text (1994) -
Pitch, roll, and yaw errors are to <1/2 arcsec.
Academic text (1996) -
PHOTO (COLOR): The central 1.5 arcsec x 1.5 arcsec of the Milky Way Galaxy.
Academic text (2004) -
Because the mean height of the turbulence is about 10 km, the guide star and target must therefore be within about 20 cm/10 km = 20 μrad = 4 arcsec.
Academic text (1994) -
Field of view is 41 x 41 arcsec, and spatial resolution is 0.4 arcsec. (Image provided by R. Q. Fugate, Phillips Laboratory, and P. McCullough, University of Illinois.)
Academic text (1994) -
Field of view is 41 x 41 arcsec, and spatial resolution is 0.4 arcsec. (Image provided by R. Q. Fugate, Phillips Laboratory, and P. McCullough, University of Illinois.)
Academic text (1994) -
To operate an adaptive optics system on a telescope at visual wavelengths, a tenth-magnitude (or brighter) reference source must be located within 1 to 2 arcsec of the astronomical target.
Academic text (1994) -
The telescope can resolve details as small as 0.15 arcsec in the night sky.
-
The observed shift of 1 arcsec indicated the presence of a new planet.
Synonyms
The angle whose secant is a given number
An angle whose secant or 1 divided by its cosine equals a given number
An angle whose cosine equals 1 divided by a given number
Surface Forms
Morphology
Etymology
The word arcsec combines arc ('a part of a circle' or 'an angle') and secant, from Latin secare meaning 'to cut'. A secant was named because it 'cuts' a circle, and arcsec gives the 'arc' or angle that matches a given secant, so it is the angle whose secant is a given number.