1. PHILAE Science Team, Venice 20091 Philae On-Comet Science Objectives prepared by HBO Document name = Scientific Objectives of the PHILAE Mission (RO-LAN-LI-1000), 6+12+28+33+1 tasks, 100 pages Document contains the experimenter’s objectives & wish list  it might not be possible to implement (operations) and to accomplish (experiments) all tasks Doc issue 1.0 released to ESA & PHILAE team by late Aug. 2008  lander objectives are considered in ESA’s planning of the ROSETTA science phase as a whole ESA has started science planning exercise through WGs science scenario approach

2. PHILAE Science Team, Venice 20092 Philae On-Comet Science Objectives prepared by HBO Issue 1.0 is incomplete and needs improvement for version 1.1 - some experiments have provided incomplete information of which only some details are indeed not known at the moment - most missing information: task priority, scenario descriptions, repetition cycles - experimenters focused on their respective instrument objectives - scenario approach with parallel/complementary measurements by other instruments (both onboard the lander and the orbiter) - for revision 2 new entry fields to be filled in - Expected Direct Measurement Result: The physical quantities that are obtained as immediate outcome of the experiment (without involving physical models). Usage of experiment models for characterizing the instrument are allowed. The expected physical units of the results should be listed as well. - Expected Results Through Modeling: The physical quantities that are obtained as indirect outcome of the experiment, now using physical models. Please identify the physical model or at least the type of physical model to be used and provide physical units of the results.

3. PHILAE Science Team, Venice 20093 Philae On-Comet Science Objectives prepared by HBO Return upon call for input for the revised document version 1.1 was insufficient positive: SD2, MUPUS, ROMAP, SESAME, COSAC, ROLIS nothing: APXS, CIVA, CONSERT, PTOLEMY Proposal on how to proceed towards a rather complete document with science priorities that are useful for planning purposes  PI teams: provide input as complete as possible  Easter 2009  LS compile version 1.1 and distribute it to PI teams  1 week thereafter  meeting of PIs and LSes with the task each PI: presentation of the respective science objectives all: discussion of science issues and pros & cons PIs: ranking of tasks per phase result: priority according to averaged ranking result

4. PHILAE Science Team, Venice 20094

5. 5 Rosetta WG3 prepared by HBO Gas environment at cometary surface and along orbital path: capabilities: gas production, gas flux, gas density for chemical species accuracy (min,mean,max): 20/50/100% of actual regime at the surface resolution: spatial 0.5m at the surface, 10min timewise; typically every 0.01AU from the Sun along the orbit purpose: instrument and mission planning Dust environment at cometary surface and along orbital path: capabilities: dust production, dust flux, dust spatial density, dust size distribution, dust speed accuracy (min,mean,max): 20/50/100% of actual regime at the surface resolution: spatial 0.5m at the surface, 10min timewise; typically every 0.01AU from the Sun along the orbit purpose: instrument and mission planning

6. PHILAE Science Team, Venice 20096 Thermal environment at cometary surface and along orbital path: capabilities: nucleus temperature at different depth (0-40cm, each 5cm) accuracy (min,mean,max): 5/10/20C resolution: spatial 0.5m at the surface, 10min timewise; typically every 0.01AU from the Sun along the orbit purpose: instrument and mission planning Plasma and magnetic environment at cometary surface and along orbital path: capabilities: for ions and electrons plasma density, plasma flux, plasma temperature, ion composition; magnetic field strength and orientation accuracy (min,mean,max): 20/50/100 of actual regime at the surface resolution: spatial 0.5m at the surface, 10min timewise; typically every 0.01AU from the Sun along the orbit purpose: instrument and mission planning Rosetta WG3 prepared by HBO

7. PHILAE Science Team, Venice 20097 Light scattering environment at cometary surface and along orbital path: capabilities: 3D surface model with albedo and light scattering properties, dust production, dust size distribution, dust light scattering accuracy (min,mean,max): 20/50/100 of actual regime at the surface resolution: spatial 0.5m at the surface, 10min timewise; typically every 0.01AU from the Sun along the orbit purpose: instrument and mission planning Dust, gas and temperature environment at cometary surface and along orbital path: capabilities: dust density, dust flux, local gravity field, gas density, gas flux, gas composition, gas temperature, surface temperature of cometary environment at landing site accuracy (min,mean,max): 20/50/100 of actual regime at the surface resolution: spatial 0.5m at the surface, 10min timewise; typically every 0.01AU from the Sun along the orbit purpose: hazard avoidance Rosetta WG3 prepared by HBO

8. PHILAE Science Team, Venice 20098 Do we have models to contribute? Rosetta WG3 prepared by HBO