Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 1268c Report Date: 09-May-96:16:24 Version: ********** Check-in Date: ********** 1.Proposal Title: PHYSICS OF ASTEROIDS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID SOLAR SYSTEM GTO/FOC 1268 Sub Category MINOR PLANETS ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Rudolf Albrecht ESA, EUROPEAN COORDINATING F GERMANY, W +49-89-320 06 DEPUTY HEAD, ST-ECF ------------------------------------------------------------------------------------ 7. Abstract The puropse of these observations is to obtain high resolution images of the asteroid Ceres with the present HST. All information given in the general form text pertains to pre-spherical aberration; observations as described there (DECON and ROT) will be carried out in Cy 9. ------------------------------------------------------------------------------------ 8. Scientific Key Words: SOLAR SYSTEM, ASTEROIDS ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 10.00 par: 0 10. Num targs pri: 16 par: 0 ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 1268c PI: Rudolf Albrecht Proposal Title: PHYSICS OF ASTEROIDS ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Hans J. Schober GRAZ UNIVERSITY AUSTRIA X John J. Caldwell SPACE ASTROPHYSICS LABORATORY, CANADA ISTS Gerd Weigelt MPI F. RADIOASTRONOMIE GERMANY, WE X Theo M. Kamperman SPACE RESEARCH LABORATORY NETHERLANDS X UTRECHT Rudolf Albrecht ESA, EUROPEAN COORDINATING GERMANY, WE X FACILITY ------------------------------------------------------------------------------------ 3. Description of proposed observations. A) DECONVOLUTION: The goal of these observations is to increase the resolution of the ST/FOC by image processing techniques. For this purpose exposures have to be taken with different ST roll angles, spaced as closely as possible in time. the rolled exposure can only be taken one orbit after the unrolled exposure. This time line should allow the determination of the direction of the rotation and of the pole axis, plus a confirmation of the potometric rotation period. One of the priority 1 objects shall be observed during cycle 1. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. The FOC at f/96 provides the required resolution. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. Asteroids have to be observed close to opposition. The scheduling of the observations is therefore closely tied to the ST launch date and to the availability of the moving target acquisition mode. We expect to work closely with the schedulers at the ST ScI. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. Quick-look data analysis will be carried out at the STScI immediately following the observations. Final data analysis will be carried out at the European Coordinating Facility, and at the computer installations of the home institutions of the other proposers. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). Our institutions will supply the following resources: Salary, travel, data analysis facilities, research support, administrative support, office space. ------------------------------------------------------------------------------------ 13. The purpose of this investigation is to determine physical properties of selected asteroids: diameters, shapes, surface structure, spin axis orientation, rotation, and possible binary nature. ------------------------------------------------------------------------------------ 11. Address Information Page 3 Name: RUDOLF ALBRECHT Category: PI Institution: ST-ECF Address: ESO KARL SCHWARZSCHILD STR. 2 D-8046 City: GARCHING/MUNICH State: Zip Code: Country: GERMANY, WEST Telephone: 49-89-320-06-287 Telex (or e-mail): 52828222 EOD ------------------------------------------------------------------------------------ TARGET LIST b)Solar System Targets ID = 1268c [ 4] ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 | TARGET NAME: CERES ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: ASTEROID 1 ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD = 1 (CERES) | | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | WND1 = 21-JUL-92:00:00:00 TO | 04-AUG-92 | ------------------------------------------------------------------------------------------------------------------------------------ REF | DATA | COMMENTS | | 1 |B=7.5 | | ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 1268c [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CERES FOC/96 IMAGE 256X256 F342W, 1 10M 1 1 CYCLE 1 F4ND,F1ND SEQ 1-4 NO GAP Comments: ALL OBSERVATIONS MUST BE SCHEDULED OUTSIDE SAA CONTOUR 5 ------------------------------------------------------------------------------------------------------------------------------------ 2 CERES FOC/96 IMAGE 256X256 F342W, 1 10M 1 1 CYCLE 1 F6ND ------------------------------------------------------------------------------------------------------------------------------------ 3 CERES FOC/96 IMAGE 256X256 F342W, 1 10M 1 1 CYCLE 1 F6ND ------------------------------------------------------------------------------------------------------------------------------------ 4 CERES FOC/96 IMAGE 256X256 F342W, 1 10M 1 1 CYCLE 1 F6ND,F1ND ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 1268c [ 6] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOC/96 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GTO/FOC ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 10.00 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category SOLAR SYSTEM ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category MINOR PLANETS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 1; SEQ 1-4 NO GAP CYCLE 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F342W,F4ND,F1ND F342W,F6ND F342W,F6ND,F1ND ------------------------------------------------------------------------------------------------------------------------------------ Target Names CERES ------------------------------------------------------------------------------------------------------------------------------------