The U.S. Space Surveillance/US STRATCOM has identified two objects associated to the Russian Phobos-Grunt spacecraft, and both objects are rapidly decaying.

The US STRATCOM said Object G and H are related to the spacecraft and not to its launch vehicle, according to Spaceflight101.com.

According to tracking data, Object G appears to have re-entered the atmosphere, with its final orbital data indicating that it was in a 271 by 239 km orbit.

Object H, on the other hand, is still in orbit but it is facing a rapid orbital decay and is currently in a 224 by 179 km orbit. However, space officials said it is headed for a re-entry into the atmosphere.

The mass and other properties of the two objects are still not known, according to space officials.

Meanwhile, the European Space Agency has announced that it is now ending its primary misison support for the doomed Phobos-Grunt probe after all attempts to re-contact the vehicle have failed. However, according to ESA officials, the agency will still be ready to assist if new developments will emerge.

"In consultation and agreement with Phobos-Grunt mission managers, ESA engineers will end tracking support today," agency officials said in a statement. "Efforts in the past week to send commands to and receive data from the Russian Mars mission via ESA ground stations have not succeeded; no response has been seen from the satellite."

Russian officials, however, have not yet declared the mission as a complete failure, and it will continue to send signals to the Phobos-Grunt and try to establish contact, according to reports.

On Dec. 1, ESA's Maspalomas Ground Station in Canary Islands, Spain joined the effort to re-establish contact with the spacecraft, in addition to the two Russian and two ESA Tracking Stations. Both Maspalomas and Perth sent commands to the spacecraft to activate its transmitter and start sending telemetry.

Commands for the Phobos-Grunt to make an orbit adjust burn were also sent by the Ground Stations but no signal was received from the spacecraft. Any vehicle maneuver was also not observed.

Scientists have predicted that if all efforts to revive the Phobos-Grunt spacecraft, it could fall back to Earth as a piece of space debris sometime in mid-January.