a problem from an olympiad(adsbygoogle = window.adsbygoogle || []).push({});

"A student tries to measure field of view (FOV) of the eyepiece of his/her

telescope, using rotation of the Earth. To do this job, the observer points the telescope

towards Vega (alpha Lyr., RA: 18.5h , Dec: +39° ), turns off its "clock drive" and measures

trace out time, t=5.3 minutes, that Vega crosses the full diameter of the FOV. What is the

FOV of this telescope in arc-minutes?"

may i apply the formula

TFOV( IN ARC MINUTES)=DRIFT TIME IN SECONDS X COS ( DECLINATION) X 0.250684462

I got it to be 61.9 arc minutes...is it ok?

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: True field of view problem

**Physics Forums | Science Articles, Homework Help, Discussion**