I'm re-reading the calculations for Sideral Time and want to make sure that I've got the basics down. I want to make sure that I have grasped a few things though. Sideral Time = local time on the autumnal equinox (Sept. 22) Sideral Time = local time + (2hours * months since Sept. 22) Sidereal Time = Right Ascension + Hour Angle So, if I go outside at 6pm local time on Nov. 22, ST will be 1800 + 4 = 2200 hours. And anything directly overhead on my meridan at that time will have an RA of 2200 hours. Did I get this right?