No. 92 - Passing Orbital Perihelion
Activities had a very low profile during the reporting period and performance of the mission has been nominal. The spacecraft observed the same area of the sky it will see during the approach to asteroid Steins next year. This was used for test and calibration purposes of the Navigation Cameras.
| DOY | Date | Pass | Main Activity |
| 337 | 03/12/07 | NNO 1375 | Monitoring |
| 339 | 05/12/07 | NNO 1377 | Monitoring |
| 345 | 11/12/07 | NNO 1383 | Monitoring and Steins observation preparation |
| 347 | 13/12/07 | NNO 1385 | Monitoring |
| 351 | 17/12/07 | NNO 1389 | Steins observations with NAVCAMs and MIDAS Test part 1 |
| 352 | 18/12/07 | NNO 1390 | MIDAS Test part 2 |
| 353 | 19/12/07 | NNO 1391 | Monitoring |
At the end of the reporting period (DoY 355) Rosetta was at 30.17 million km from Earth (0.2 AU) and the one-way signal travel time was 101 seconds. The distance to the Sun was 136.4 million km (0.912 AU).
Spacecraft
ALICE
The instrument is OFF.
CONSERT
The instrument is OFF.
COSIMA
The instrument is OFF.
GIADA
The instrument is OFF.
MIDAS
The instrument is OFF.
MIRO
The instrument is OFF.
OSIRIS
The instrument is OFF.
ROSINA
Instrument is on as part of an out-gassing attempt.
RPC
The instrument is OFF.
RSI
The instrument is in muted status.
VIRTIS
The instrument is OFF.
LANDER Philae
The instrument is OFF.
SREM
Since DoY 248/2007 the accumulation settings are configured for active cruise mode.
Future Milestones
The cruise phase continues towards asteroid Steins that will be encountered early September 2008. During the next weeks Rosetta will complete the Steins observation campaign and start the reconfiguration of the various spacecraft subsystems for intermediate Sun distances. The reconfiguration will be completed in March before the entry in Near Sun Hibernation Mode. The second leg of the post-Earth Swing-by trajectory correction is planned for 21 February 2008.