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No. 112 - Near Sun Hibernation Mode

No. 112 - Near Sun Hibernation Mode

Report for Period 21 March to 3 April 2009The reporting period covers the last two weeks of active cruise phase before the start of passive cruise phase 6 on 2 April 2009. The spacecraft is now in Near Sun Hibernation Mode (NSHM) and will remain in this passive cruise configuration until beginning of September. Spacecraft and ground segment performance during the reporting period have been nominal.

During the reporting period the performance of the deep space manoeuvre 4, which was executed on 18 March 2009, has been fully analysed confirming the good results of the preliminary analysis.

Mission operations have been conducted with support of the ESA New Norcia (NNO) ground station.

DOY Date Pass Main Activity
082 23/03/08 NNO 1852


085 26/03/09 NNO 1855

Switch to four reaction wheels

090 31/03/09 NNO 1860

Swap to star tracker B

091 01/04/09 NNO 1861

Monitoring NSHM pre-conditions

092 02/04/09 NNO 1862

NHSM entry

093 03/04/09 NNO 1863

NSHM verification

At the end of the reporting period (DoY 093) Rosetta was at 383.78 million km from Earth (2.56 AU) and the one-way signal travel time was 1280 seconds. The distance to the Sun was 317.25 million km (2.12 AU).


All instruments are now switched OFF, except for the Standard Radiation Environment Monitor (SREM) that continues to run in the background.

The instrument is OFF.

The instrument is OFF.

The instrument is OFF.

The instrument is OFF.

The instrument is OFF.

The instrument is OFF.

The instrument is OFF.

The instrument is OFF.

The instrument is OFF.

The instrument is muted.

The instrument is OFF.

The instrument is OFF.

Since DoY 091/2009 the accumulation settings are configured for passive cruise mode.

Future Milestones

The current passive cruise phase will continue until beginning of September when the spacecraft will be reconfigured in active cruise mode in preparation of the Earth swing-by 3 phase.

Legal disclaimer
This report is based on the ESOC mission operations report, WOR #112. Please see the copyright section of the legal disclaimer (bottom of this page) for terms of use.

Last Update: 1 September 2019
15-Apr-2024 12:31 UT

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