The 28% illuminated waxing crescent Moon will occult (cover) magnitude +2.6 Beta Scorpii for North American observers during the evening of Monday 2020 SEP 21.

The immersion will occur on the lunar dark limb, with emersion from the bright limb. Any observers in Panama on the only graze path can witness the star passing through lunar hills and valleys. Those north of the graze path will see a full occultation.

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

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.