The nearest found maser object is G30.641+3.247 (offset by 3.6" from input coordinates)
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display_aladin("278.9262655","-0.5550590","G30.641+3.247","G30.641+3.247","(162) IRAS 18331-0035, IRAS 18331-0035, G30.64+3.25","0")