Celestial Coordinate Calculator

Convert RA/Dec equatorial coordinates to Alt/Az horizontal coordinates for your location and time.

RA Hours

RA Minutes

RA Seconds

Dec Degrees

Dec Arcmin

Dec Arcsec

Observer Latitude

Observer Longitude

Date and Time (UTC)

Altitude / Azimuth

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Hour Angle

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Local Sidereal Time

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RA (decimal hours)

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Dec (decimal degrees)

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Visibility

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Related Calculators

Polar Coordinates

Polar coords.

Degrees Radians

Angle convert.

Orbital Period

Orbits.

Time Zone

Time zones.

Sunrise Sunset

Sun times.

Unit Circle

Trig circle.