eROSITA MPL

This page provides general mission planning information and tools to support eROSITA/SRG observation planning.

The SRG (Spectrum-Roentgen-Gamma) spacecraft was launched 13 July 2019 from Baikonur. The eROSITA CalPV phase took place from mid September to early December 2019.

The eROSITA all-sky survey (eRASS) started mid December 2019 and has an envisaged duration of 4 years. It consists of eight consecutive 0.5 year all-sky scans.

Observing plans for eROSITA and the M. Pavlinsky ART-XC, the two instruments onboard SRG, are merged into a combined SRG observing plan by our colleagues from IKI (Moscow).

For monthly observing plans (past+current) + SRG tracking see:

SRG (Russian page) incl. monthly plans/tracking: monthplan

Note: eROSITA was put into safe mode and is currently not taking data MPE news (1) (2)





eROSITA all-sky survey (current mission phase)


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eRASS exposure (so far, model), see Survey page for details.





eROSITA visibility/scanning check


Specific target visibilities/survey scanning times can be calculated under 'Viscal'.

Previous survey scanning times can be checked under 'Histcal'.






eROSITA CalPV Phase (completed)


Executed eROSITA planning (Sept. - Dec. 2019): eRO_CalPV



   SRG launch 13 July 2019 - visibility mid September to early November


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Visibility sketch for the CalPV phase; first 50 days, Sun constraints only.
Light green: observable sky area, mid green: visibility fraction > 50%, dark green: always visible. Due to basic symmetries, sky visibilities repeat with a half year period.