View Full Version : Moon Occults Gamma Librae - North America - Evening July 31

2017-Jul-28, 03:21 PM
The waxing gibbous Moon will occult (cover) the magnitude +3.9 star Gamma Librae for many North American observers during the evening of Monday 2017 JUL 31.

Immersion will occur on the lunar dark limb and emersion on the bright limb. An observer on the only graze path will witness the star winking on and off as lunar hills and valleys pass by. Anyone north of the graze path will see a full occultation.

Iíve created a North American graze map, a preview graphic with data for Chicago, and a set of Besselian elements for input to a computer program. They can be seen by visiting my Occultations webpage at www.CurtRenz.com/occultations.html

Photos and descriptions of the occultation would be welcome additions to this thread. If you would like specific occultation or graze predictions for your location, please reply to this post with your longitude, latitude, elevation and time zone.