Print out a copy of this page. Estimate the magnitude of your variable star on the first picture of the star field using the magnitudes of the stars around it. Proceed through each of the pictures and place your estimated magnitude and the corresponding JD in the table below. Magnitude Interpolation Tips: Look at the plate designated JD +300 (=JD 2449300). How would you estimate the magnitude of the variable star, since it doesn't exactly match any of the comparison stars in the plate? To obtain the magnitude of the variable star, you must estimate fractional differences between stars which are close in magnitude (just a bit fainter and just a bit brighter). A useful website to assist with interpolation may be found on the AAVSO's