The nearest found maser object is G81.764+0.596 (offset by 15.6" from input coordinates)
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display_aladin("309.7615500","42.4246305","G81.764+0.596","G81.764+0.596","B 9-1 h, B9-1 h, BGPS6920(W75S(3)), DR21N, G081.7624+00.5916, W 75 S(3), W75 S(3), W75S(3), W75S(3)a, DR 21A, DR 21B, G081.7522+00.5906, G081.753+00.593, G081.7624+00.5916, W75 S(1), W75 S(3), W75 S(l)","0")