Orbimage of Dulles, an operator of satellites that collect digital imagery from space, bought Colorado-based Space Imaging for about $58.5 million minus an amount that privately held Space Imaging will pay on its debt before closing.

Orbital Sciences of Dulles was awarded a contract by NASA to provide Pegasus and Taurus launch services for space missions until 2012. Terms were not disclosed.

Synchris is the new name of MAP ROI Systems of Sterling, which provides software for businesses bidding on government contracts.

Argon ST of Fairfax, a defense contractor specializing in command and control systems, acquired Radix Technologies of Mountain View, Calif. Terms were not revealed. Radix makes signal-processing equipment for military, intelligence and commercial use.

BroadSoft of Gaithersburg acquired Carbon Twelve, based in Sydney, on terms that were not disclosed. Both companies develop software used by phone companies to provide Internet phone service.

W.R. Grace of Columbia, a supplier of building materials and specialty chemicals, opened an office in Shanghai and a technical services center in Beijing. The company said its history in China dates to the 19th century, when its steamships traded goods there.

Exent Technologies of Bethesda said Verizon Communications' new games-on-demand service is using Exent's technology to deliver games over a broadband connection.

Christian & Timbers, a New York-based executive search firm, moved its Washington area office to the District from Tysons Corner.