Published: Aug 03, 2011 7:14 PM EDT
Updated: Aug 03, 2011 6:15 PM EDT

CAPE CANAVERAL, Fla. (AP) - Flight controllers halted the release of a ham radio satellite outside the International Space Station by a pair of spacewalking astronauts Wednesday because one antenna may be missing.
    
Russian Sergei Volkov took the boxy 57-pound satellite out with him as he emerged from the space station.
    
He was all set to let it loose with his left gloved hand when Mission Control outside Moscow called off the operation.
    
TV images showed only one antenna sticking out of the boxy satellite. There were supposed to be two antennas, said NASA spacewalk commentator Josh Byerly.
    
Mission Control directed Volkov and his spacewalking partner, Alexander Samokutyaev, to continue with other work as experts on the ground debated whether the satellite could be released later in the excursion or whether it would have to wait until another day.

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