posted 07-20-2024 04:56 PM               

Progress M-17 was also used to demonstrate extended duration Progress missions; remaining in orbit for almost a year with a docked phase lasting 132 days. ...

Due to its extended mission, the spacecraft did not have sufficient fuel remaining to deorbit, and it was therefore kept in orbit for 205 days of free flight, until its orbit had decayed sufficiently for a deorbit burn to be conducted with what fuel remained.