Table 4: Alternate angular units.
Unit String Meaning Notes

deg degree of arc $\pi/180$ radians

arcmin minute of arc 1/60 degree

arcsec second of arc 1/3600 degree

mas millisecond of arc 1/3 600 000 degree

rad radian $180/\pi$ degrees

**Table 4:** Alternate angular units.
Unit String	Meaning	Notes
`deg`	degree of arc	$\pi/180$ radians
`arcmin`	minute of arc	1/60 degree
`arcsec`	second of arc	1/3600 degree
`mas`	millisecond of arc	1/3 600 000 degree
`rad`	radian	$180/\pi$ degrees

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