November 8, 2024, Friday, 03:00PM (GMT+03.00, Moscow), IKI, Room 200

Abstract:

In February 2022, the eROSITA telescope aboard the Spektr-RG spacecraft was switched to a "sleep" mode. Following this decision, the observation plan for the telescope, and thus the spacecraft’s orientation, was modified several times. By March 2022, priority was given to observing the most interesting regions of the sky, and in November 2023, the full sky survey resumed, though exclusively with the Russian telescope. These adjustments resulted in additional fuel consumption by the spacecraft. To extend the observatory’s operational lifespan, it has been proposed to revise the telescope's positioning strategy. The goal is to optimize the balance between reaction wheel desaturation events, fuel consumption for orbital correction maneuvers, and scientific observation requirements, while ensuring orbital stability around the Lagrange point L2 of the Sun-Earth system without the need for additional corrections.