Amateur Astronomers Association of Pittsburgh opens Mingo Observatory to the public Friday, May 6 and Saturday, May 7, 2016. No reservations. No charge. No limit to group size. Just show up. Please refer to the Mingo 2016 Star Party Schedule. The Observatory is located in Mingo Creek County Park, Nottingham Township, and is 10 miles east of Washington PA. The park is located off Route 88 or Route 136 in the northeast section of Washington County. Inside the park, the observatory is at the end of Mansion Hill Ext. Road (across from the Henry Covered Bridge) on the top of the hill past Shelter 10. Observatory Site: Lat: 40° 12’ 42” N Long: 80° 1’ 14” W Elevation: 1180 ft. (360 m). Observatory Phone 724-348-6150.