The nearest found maser object is G90.210+2.040 (offset by 2.8" from input coordinates)
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display_aladin("315.9250330","49.8639610","G90.210+2.040","G90.210+2.040","21020+4939, 21020+4939, G090.2095+02.0405, IRAS 21020+4939, G090.2095+02.0405","0")