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Compute the instantaneous parallactic angle for a given RA/Dec. See also plotParallacticAngle.


au.parallacticAngle(radec, mjd=None, date=None, observatory='ALMA')
  • radec: a hexagesimal string, or list of floats: [RArad, Decrad]
  • observatory: name of telescope (from CASA database)
  • mjd: MJD to use
  • date: date/time string to use
  • If no date is specified, it uses the current date/time.
Returns: one value in degrees


CASA <5>: au.parallacticAngle('17:51:00 09:39:00', date='2015-06-21 04:31')
MJD= 57194.18819, MJDseconds= 4941577860.0, JD= 2457194.68819
  Out[5]: 178.17420355393764

-- ToddHunter - 2015-06-19
Topic revision: r1 - 2015-06-19, ToddHunter
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