Re: AstronomicalData. How can be taken into account when a planet is

*To*: mathgroup at smc.vnet.net*Subject*: [mg115256] Re: AstronomicalData. How can be taken into account when a planet is*From*: DrMajorBob <btreat1 at austin.rr.com>*Date*: Wed, 5 Jan 2011 05:47:47 -0500 (EST)

You can check whether distance to the sun is greater or less than distance to the planet, but I think the answer is that your code already takes it into account. Mathematica computes the 2-dimensional position of Venus in the sky; you don't need distance - just altitude and azimuth. Bobby On Tue, 04 Jan 2011 17:49:27 -0600, Guillermo Sanchez <guillermo.sanchez at hotmail.com> wrote: > Dear friend, > I have represented the venus analemma for 2 next years as follow > pos = $GeoLocation > zone = $TimeZone > analemmavenus = Table[{ > AstronomicalData["Venus", {"Azimuth", {2011, 1, i, 6}, pos}, > TimeZone -> zone], > AstronomicalData["Venus", {"Altitude", {2011, 1, i, 6}, pos}, > TimeZone -> zone]}, {i, 1, 2*365.25, 10}]; > Graphics[{Orange, Point[analemmavenus]}, Frame -> True, > FrameLabel -> {"azimut", "altitud"}] > > Is it taken into account when the planet is behind the Sun? > It the answer is negative. How can be taken into account that a planet > is behind the Sun? > HNY > Guillermo > -- DrMajorBob at yahoo.com