"

What is a Arcsecond?

Angle Unit

Definition

An arcsecond is a unit of angle equal to 1/60 of an arcminute or 1/3600 of a degree.

Popular Arcsecond Conversions

Most common conversions from Arcseconds

1 " = 0.000277778 ° Arcsecond to Degrees 1 " = 0.0000048481 rad Arcsecond to Radians 1 " = 0.0003086422 gon Arcsecond to Gradians 1 " = 0.016667 ' Arcsecond to Arcminutes 1 " = 0.00000077161 tr Arcsecond to Turns

History

The arcsecond is essential in astronomy for measuring very small angles, such as stellar parallax and proper motion.

Common Uses

Astronomy (star positions)
Telescope resolution
Satellite tracking
Geodesy and surveying

Fun Facts

💡

The Hubble Space Telescope has 0.05 arcsecond resolution

💡

Alpha Centauri has a parallax of 0.76 arcseconds

💡

1 arcsecond at Earth's surface is about 31 meters

All Arcsecond Conversions

Arcseconds to Degrees " → ° Arcseconds to Radians " → rad Arcseconds to Gradians " → gon Arcseconds to Arcminutes " → ' Arcseconds to Turns " → tr