Carrying NASA science and technology, Astrobotic’s Peregrine lunar lander continues on a trajectory toward Earth and is expected to re-enter Earth’s atmosphere on Thursday about 4 p.m. EST.

To ensure a controlled, safe re-entry, Astrobotic in coordination with NASA and other government agencies, changed the spacecraft’s projected re-entry location to a remote area of the South Pacific. No ground hazards are anticipated.

Astrobotic evaluated several options with NASA consultation to end the mission safely and determined that the best approach for minimizing risk and ensuring responsible disposal of the spacecraft would be Peregrine’s re-entry into Earth’s atmosphere, likely causing the spacecraft to burn up.

After Astrobotic confirmed Astrobotic’s Peregrine Mission One would not be a soft-landing on the Moon, NASA science teams adjusted their procedures to collect data in space near the Moon. All NASA payloads designed to power on have received power and collected data, including: Linear Energy Transfer Spectrometer (LETS), Near-Infrared Volatile Spectrometer System (NIRVSS), Neutron Spectrometer System (NSS), and the Peregrine Ion-Trap Mass Spectrometer (PITMS). Since the LRA (Laser Retroreflector Array) instrument is a passive experiment designed for the lunar surface, it cannot conduct any operations in transit.

Although interpreting the results will require some time, preliminary data suggests that the instruments have collected measurements of the radiation environment and chemical compounds in the lander vicinity, a positive sign that the instruments survived the harsh conditions of space and are functioning as expected.

The NSS and LETS experiments gathered measurements of the radiation environment in interplanetary space around the Earth and the Moon. The two instruments collected different components of the radiation spectrum, providing complementary insights into the galactic cosmic ray activity and space weather resulting from solar activity.

The PITMS operations were successful, and the team was able to acquire multiple mass spectra both before and after opening the instrument’s protective dust cover. The data confirm PITMS was in good health and that the instrument could provide useful measurements of lunar volatile compounds on future missions. The PITMS is a partnership between NASA; The Open University; RAL Space; and ESA (European Space Agency).

NIRVSS also successfully powered on and collected images, spectra, and additional data around the lander. A variety of chemical compounds were detected in the NIRVSS spectra which the team currently attributes to lander outgassing and leaked fuel. The team also refined their process for capturing spectra, or intensity of light being emitted, and images while at low data rates. Some of this work validated data processing methods, tools, and operational procedures, all of which will improve NASA’s ability to map the lunar surface in the future.

NASA will join Astrobotic during their media telecon at 1 p.m. EST on Friday, Jan. 19, to provide an end of mission update. Audio of the call will stream live on NASA’s website.

Additional updates can be found on Astrobotic’s platforms.

NASA Science, Astrobotic’s Peregrine Lunar Lander Mission to Conclude