The nearest found maser object is G2.932-3.228 (offset by 0.1" from input coordinates)
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display_aladin("271.2577360","-28.0319170","G2.932-3.228","G2.932-3.228","IRAS 18018-2802, IRAS18018-2802 npl, V1804 Sgr, IRAS 18018-2802, V1804Sgr, V1804 Sgr","0")