Saturday, October 8, 2011

The Celestial Sphere and Observational Planning

Wksht 2 was very, very long, and we were able to write up problems one and two. We got quite far on Problem seven, but Jackie informed us that it was unnecessary, so if we have time we might attempt it ater. (Maybe not - but we got through the theory of it very well and now could do it quite easily!) Here's the problem set: Ws Celestial Sphere And here are our solutions: wksht2

Two drawings are also necessary, which will be uploaded soon. But here is my graph of tau Ceti's time of meridian crossing (see problem 2):

2 comments:

  1. Wow, that's a great write-up!! It inspires me to work on mine... :) you've set the bar really high!!

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  2. This is a fantastic write-up! Your explanation of LST is sooo good.

    A couple notes:
    -"it will be highest in the sky some-time in mid-October" - this seems to contradict what you already said about the max elevation being constant throughout the year. what did you mean by this?

    -Your calculation that the transit time on the spring equinox in UT-8 should be 13:44 is correct. However this doesn't seem to agree with your plot, unless maybe I'm reading it wrong? This is a good illustration of why order-of-magnitude, and more generally pen-and-paper, calculations are important, to make sure our code does what we expect it to.

    -"if we were using the alt-az orientation of thetelescope, it is possible that there might a diļ¬€erence in this analysis, and theelevation of thie might change" - the elevation and the azimuth of a star in the sky are physical properties dependent only on your location on the earth and the date and time. they shouldn't depend on what you use to observe the star.

    again, GREAT write-up!

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