SpeX Parallactic Angle Calculator
SpeX: 0.7-5.3 Micron Medium-Resolution Spectrograph and Imager
NASA InfraRed Telescope Facility(IRTF), Institute for Astronomy, University of Hawaii
SpeX Observer Documentation Technical Documentation

SpeX PARALLACTIC ANGLE CALCULATOR

This form can be used to estimate the parallactic angle and differential atmospheric refraction for observations with SpeX. The output is in degrees from North through East.
This readme.html provide some documentation.
Contact Mike Connelley for further information or assistance.

Select an Observatory:
Hour Angle of Object (HH MM SS):
(include neg sign with first non-zero entry)
 
Declination of Object (DD MM SS):
(include neg sign with first non-zero entry)
 
Barometric Pressure (in mm Hg):
Water Vapor Pressure (in mm Hg):
Temperature (in deg C): 
Inputs/Command:
  Obs Location,Alt: 19 49 34.39, 4.16807 
                HA: 00 00 00 
               Dec: 19 49 34 
     BP,Water,Temp: 615, 2, 0 
           Command: none
   
Output:
none