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This is because the value given here is not in arcseconds but in second of hour. To find it do: 80/15/cos(50°) = 8.3 The value to send to PHD2 is: 8.3*15 = 124 , because PHD2 already manage the cos(Dec). This is because of all this confusion that I like you implement it as Movement + PA in CCDciel. |
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RA seconds. Clear. I have always understand PHD2 uses for manual input of RA and DEC rates "Arcsec/hr". This confuses everybody including me :). That why you uses 's' and not " for the unit. Maybe it is better to follow the PHD2 units for these values. To be compatible I'm adding the comet movement in "/min and PA to HNSKY like Minor Planets Centre. https://openphdguiding.org/man-dev/Tools.htm#Comet_Tracking To enter the rates manually, you would select "Arcsec/hr" for units and "RA/Dec" for axes, then enter the rates from the comet's ephemeris. If you are getting the rates from the MinorPlanetCenter web site, you should choose the option for 'Separate RA and Declination coordinate motions'. PHD2 will automatically adjust the rates to compute the apparent motions in the sky. |
- Anonymous
