An arc second is equal to one-sixtieth of an arc-minute (60th of a degree).

The prefix, arc, is used solely to differentiate this angular measurement from a second of time. By convention, it is 1 part in 1,296,000 of a circle; or 1 part in 3,600 of a degree; or 0.0002778 degree.

1/60 of an arc-minute, which equals 1/60 of a degree. Since there are 360 degrees in a full circle, there are 1,296,000 arc-seconds in a full circle.

An arc-second is 1/60 th of an arc-minute.

A unit of angle. One arc second is one sixtieth of one arc minute, and 1/3600 of a degree.

One-sixtieth of a arc minute on the sky. (1/3600 of a degree)

an extremely small unit of angular measure

a mapping and navigational term describing a unit of distance on a curved surface as a fraction of an angle, measured in degrees, minutes and seconds of arc. In these maps, 30 arc seconds represents about 1km distance.

A unit of angular measurement. One 60th of an arc minute or 1/3600 of a degree.

(symbol " ) Angular measurement. 1/3600 of a degree.

One arc second is 1/60 of an arc minute and 1/3600 of an arc degree. The apparent size of a dime about 3.7 kilometers (2.3 miles) away would be an arc second. The angular diameter of Jupiter varies from about 30 to 50 arc seconds, depending on its distance from Earth.

Another measure of angular separation, - one sixtieth of an arc minute. (1/3600th of a degree.)

A measure equal to one-sixtieth of an arc-minute.

Abbreviated arcsec. A unit of angular measure in which there are 60 arc seconds in 1 arc minute and therefore 3600 arc seconds in 1 arc degree. One arc second is equal to about 725 km on the Sun.

(arcsec) A unit of angular measure equal to 1/3600th of a degree. An arc second also uses the notation of a double quote, e.g., 5 arcsec = 5

1/3600th of a degree (1 second) of latitude or longitude.

a tiny angle unit = 1/3600th of a degree = 1/60th of an arc minute.

angular separation equal to 1/60th of an arc minute. An arc minute is an angular separation equal to 1/60th of one degree. For example, the full moon has an angular measure of about half a degree, or 30 arc minutes.

A unit of angular measure of which there are 60 in 1 are minute ( or therefore 3600 in 1 are degree).