The nearest found maser object is G33.729-0.364 (offset by 2.4" from input coordinates)
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display_aladin("283.5475728","0.5434753","G33.729-0.364","G33.729-0.364","18516+0028, G33.730-0.365-1612A, G33.730-0.365-1612B","0")