Gr grazing occultation at site. SAO catalogue number Xnnnnn USNO XZ catalogue no. Q nnnn USNO Q catalogue no. D the double star code. During a lunar eclipse, this gives the percent distance of the star from the centre of the umbral shadow, and is followed by 'U' sunalt the altitude of the sun, but only if it is greater than -12 deg.
Negative values indicate a bright limb event.
WA Watts Angle - the angle of the event around the limb of the moon, measured eastward from the moon's north pole. Essential for reappearances, as it locates the event with reference to lunar features. To use, use a protractor to mark a map of the moon around the circumference at 10 deg intervals, starting at the north pole. Mare Crisium is at about 300 deg. This provides the Watts angle scale.