Mean object RA, Dec: 20 38 59 +42 22 44 (309.7461700 42.3790540)
Mean object l, b: 81.7171 0.5751

Maser object G81.710+0.563

Other names: DR21(OH), G81.721+0.571, W75S(OH), J20385719+4222409.

Detected/non-detected masers in the object: +OH -SiO