The Differential Refraction Error Calculator estimates the errors in double star measurements — specifically separation and position angle — caused by atmospheric refraction.
Please enter the measured Separation of the Double Star in arcseconds and the measured Position Angle in degrees. Additionally, provide the Right Ascension and Declination, both in degrees, of the measured double star. Furthermore, include the Latitude and Longitude (both in degrees) of the location of observation where the measurement was taken, as well as the Date and Time of the measurement in UTC.
Press the [SUBMIT DATA] button to compute the error. Use [CLEAR ALL] to empty the input fields and prepare for new data, or click [RESTORE DEFAULT] to reload the default data