I've been asked by my astrophysics lecture to conduct an observing project of Bright Stars, using the time at which they transit the meridian to locate them on the sky. I was just wondering if you could check my "thoughts" so far?
The Hour Angle of a star is 0 at the time it crosses the meridian, so my LST will be equal to the stars right ascension? So GST will be RAStar
+ my Longitude?
Now, am I right in thinking that GST would be also equal to the GHA and RA of the sun on that day? So using Universal Time = GHASun
-[tex]\xi[/tex] + 12hrs, I can sub in my known RASun
, longitude and RAStar
in place of GHASun
Is this remotely correct? I tried to calculate a value, and ran it through using Stellarium
, but it seemed completely wrong.