1. The problem statement, all variables and given/known data OmegaCen is a Globular Cluster which lies at coordinates: R.A. = 13h26m45.89s, Dec = −47°28′36.7′′ (J2000.0) estimate the optimal day on which to observe this object. 2. Relevant equations 3. The attempt at a solution We are to interpret optimal as 12 am midnight directly overhead since this is 12 hrs after noon you subtract 12hrs RA = 1hr26m45.89sec which is ≈ 1.446 hrs RA and this is due to the monthly RA shift 2 hrs of RA shift per month so, 30/1.446 ≈ 20.75 days so 20.75 days after the vernal equinox, which is april the 10.75 th im not quite sure how to interpret the 10.75, do i say its on the 10th of april or the 11th ? and the observation is meant to be at 12 am midnight so would you say its on the 11th april? (at the very beginning). Thank you!