Celestial Coordinates Werkzeuge Launch the experiment and check in the tab "Location" whether date, time and location are correctly derived from the timer module and the GPS sensor. In the tab "RA-->HA" you may enter the right ascension (RA) of a celestial object and read out the hour angle (HA). The HA specifies the time after culmination of the object at your location. In the tab "POINTER" you get the declination and RA of the direction the long edge of your phone is pointing to. The orientation measurement is based on the magnetic field (and other sensors). Hence keep the phone reasonably far from magnetic materials. But even then the measurements may be inaccurate! Sometimes the accuracy improves with time or if you move the phone around and put it back into position. In this version of Celestial Coordinates the POINTER-functionality only works on android. It may work on ios as well using future versions of phyphox. timeoffset unixtime jd jdA jdB jdC jdD jdE alpha year month month1 month2 day hour minute second lat lon status RAinh RAinmin tmp GMST0 GMST1 LMST HAdeg HAh HAmin decl az RAdeg RAh RAmin t w x y z w1 x1 y1 z1 xvec yvec zvec wq xq yq zq lat lon status x y z w year month day hour minute second lat lon status RAinh RAinmin HAh HAmin decl RAh RAmin lat wq lat xq wq xq yq zq w x y z w1 wq xq yq zq w x y z x1 wq xq yq zq w x y z y1 wq xq yq zq w x y z z1 w1 x1 y1 z1 xvec w1 x1 y1 z1 yvec w1 x1 y1 z1 zvec xvec yvec zvec decl xvec yvec zvec az timeoffset t timeoffset t unixtime unixtime jd jd alpha jd alpha jdA jdA jdB jdB jdC jdC jdD jdB jdD jdE jd jdB jdD jdE day jdE month1 jdE month2 jdE 14 month1 month2 month jdC jdE month year unixtime second unixtime second minute unixtime second minute hour jd tmp tmp GMST0 GMST0 unixtime GMST1 GMST1 lon LMST LMST RAinh RAinmin HAdeg HAdeg HAh HAdeg HAmin LMST az RAdeg RAdeg RAh RAdeg RAmin year month day hour minute second RAinh RAinmin HAdeg decl RAdeg