In a statement from satellite tracking company Leolab, the Infrared Astronomical Satellite (IRAS) by NASA and the U.S. Air Force’s Gravity Altitude Balancing Experiment Satellite (GGSE-4) are located in the low orbital region over Pittsburg, USA. It was stated that it made a close transition in opposite directions.
The statement predicted that two non-use satellites moving in opposite directions at orbit of 14.7 kilometers per second in the orbit approach each other up to 47 meters in transit.
Since both satellites were out of use, their maneuvers could not be controlled from Earth. He was concerned that a large amount of space debris would occur if the satellites collide, and that debris fragments would pose a danger to other satellites operating.
The IRAS satellite NASA launched into space in 1983 was the first infrared space telescope. The satellite could function for less than a year.
The GGSE-4 satellite belonging to the U.S. Air Force was launched into the space for experimental purposes in 1967, in which the principles of the design of spacecraft were explored.