SourceEpochImageVisibility
2250+194
1997DEC17 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2003JUL09 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2004JUL14 2 GHz , 8 GHz 2 GHz , 8 GHz
2007AUG01 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2008SEP03 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
A "+" after the frequency indicates VLBA+ observations.