! File: 1131C.PROP ! Database: PEPDB ! Date: 16-FEB-1994:02:55:12 coverpage: title_1: SATURN SATELLITE SEARCH (WF/PC-27): title_2: CYCLE 3 AND FUTURE-CYCLE CONTINUATION sci_cat: SOLAR SYSTEM proposal_for: GTO/WFC pi_title: PROF. pi_fname: JAMES pi_mi: A. pi_lname: WESTPHAL pi_inst: CALTECH pi_country: USA pi_phone: (818) 356-4900 keywords_1: SATURN, SATELLITES, JANUS, EPIMETHEUS, TELESTO, keywords_2: CALYPSO, ATLAS hours_pri: 0.50 num_pri: 1 pi_position: PROFESSOR OF PLANETA ! end of coverpage abstract: line_1: The purpose of these observations is to determine the positions of satellites line_2: that cannot be observed from the ground (coorbital and shepherding satellites), line_3: and that have been indicated by Voyager but not confirmed (satellites in the line_4: orbits of the coorbitals, Mimas, Tethys, and Dione), and to do a completeness line_5: survey for satellites in the Saturnian system down to 22nd magnitude between line_6: the A ring and Dione. ! ! end of abstract general_form_proposers: lname: WESTPHAL fname: JAMES mi: A. inst: CALTECH country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: The Saturnian system with the rings and many satellites, some sharing orbits in line_2: librational motions, is the most complex example of planetary development line_3: currently known. There are indications from Voyager observations that the line_4: system may be even more complex. The detection of additional satellites may line_5: help explain the complex ring structure and may also reveal more complex line_6: satellite motions than currently known. line_8: Observations of the coorbitals, which can only be observed from the ground when line_9: the Earth is in the ring plane of Saturn, will provide data for determining the line_10: masses of the satellites, as well as their librational period and motions. line_12: Observations will be made to determine the positions of satellites that cannot line_13: be observed from the ground, specifically the coorbitals and shepherding line_14: satellites. Also the purpose is to image satellites that have been indicated line_15: by the Voyager spacecraft, specifically additional satellites in the orbits of line_16: the coorbitals, Mimas, Tethys and Dione, and to detect additional satellites line_17: between the A ring and the orbit of Dione. ! question: 3 section: 1 line_1: The telescope should be pointed so that Saturn and the A ring are located line_2: diagonally in one chip of the Wide Field camera with the edge of the ring close line_3: to the central point of the chip. A series of three exposures are taken with line_4: this configuration. Then Saturn and the rings are shifted to the diagonally line_5: opposite chip of the camera, so the opposite edge of the A ring is close to the line_6: central point of the chip and the exposure sequence is repeated. Then this line_7: pair of pointings is repeated two more times. line_9: Observations to be taken in Cycle 9. ! question: 5 section: 1 line_1: The observations need to be scheduled when the coorbital satellites are at line_2: eastern or western elongation and when Saturn is near opposition (May 28, 1986, line_3: June 9, 1987, June 20, 1988). ! question: 13 section: 1 line_1: The purpose of these observations is to determine the positions of satellites line_2: that cannot be observed from the ground (coorbital and shepherding satellites), line_3: and that have been indicated by Voyager but not observed (satellites in the line_4: orbits of the coorbitals, Mimas, Tethys, and Dione), and to do a completeness line_5: survey for satellites in the Saturnian system down to 22nd magnitude between line_6: the A ring and Dione. ! !end of general form text general_form_address: lname: SEIDELMANN fname: P. mi: K. category: CON inst: US NAVAL OBSERVATORY addr_1: NAUTICAL ALMANAC OFFICE city: WASHINGTON state: DC zip: 20390 country: USA phone: (202) 653-1545 ! lname: GUNN fname: JAMES mi: E. category: CON inst: PRINCETON UNIVERSITY addr_1: ASTROPHYSICAL SCIENCE addr_2: PEYTON HALL city: PRINCETON state: NJ zip: 08540 country: USA phone: (609) 452-3802 ! lname: FABER fname: SANDRA mi: M. category: CON inst: UC SANTA CRUZ - LICK OBSERVATORY addr_1: NATURAL SCIENCE II, BLDG. 160 city: SANTA CRUZ state: CA country: USA phone: (408) 429-2944 ! lname: WESTPHAL fname: JAMES mi: A. title: PROF. category: PI inst: CALTECH addr_1: M/S 170-25 addr_2: DIVISION OF GEOLOGICAL addr_3: & PLANETARY SCIENCES city: PASADENA state: CA zip: 91125 country: USA phone: (818) 356-4900 ! ! end of general_form_address records ! No fixed target records found solar_system_targets: targnum: 1 name_1: SATURN descr_1: OTHER SATELLITE SEARCH lev1_1: STD = SATURN ! ! end of solar system targets ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: SATSAT targname: # config: WFC opmode: IMAGE aperture: WFALL sp_element: F606W num_exp: # time_per_exp: 1.0S priority: # param_1: CR-SPLIT=NO, param_2: PRE-FLASH=YES, param_3: CLOCKS=YES req_1: SEQ 1-2 NO GAP; comment_1: CYCLE 3-9 VERSION comment_2: JEG/RML 3/25/92 17:05. ! linenum: 2.000 sequence_1: DEFINE sequence_2: SATSAT targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: 20S priority: ^ param_1: CR-SPLIT=NO, param_2: PRE-FLASH=YES, param_3: PURGE=YES, param_4: CLOCKS=YES ! linenum: 4.000 sequence_1: USE sequence_2: SATSAT targname: SATURN num_exp: 1 priority: 2 req_1: POS TARG 20,11; req_2: ORIENT 54D +/- 1D; req_3: SEQ 4-5 NO GAP; req_4: SEQ 4-9 WITHIN 300M; req_5: AT 7-AUG-1992 +/- 30D; req_6: CYCLE 4 / 4-9; req_7: COND IF TAC OK / 4-9; comment_1: NEAR OPPOSITION (+/- 1 MONTH) comment_2: REQUESTED POS TARG TOLERANCE comment_3: +/- 0.5"(X), +/- 0.1" (Y) comment_4: FOR LINES 4-9. comment_5: AT 19-AUG-1993 +/- 30D IF CYCLE 3. ! linenum: 5.000 sequence_1: ^ targname: ^ num_exp: ^ priority: ^ req_1: POS TARG 0,-31; req_2: ORIENT 49.3D +/- 1D; ! linenum: 6.000 sequence_1: ^ targname: ^ num_exp: ^ priority: ^ req_1: POS TARG 20,11; req_2: SAME ORIENT FOR 6 AS 4; req_3: SEQ 6-7 NO GAP; req_4: AFTER 4 BY 96M +/- 10M; ! linenum: 7.000 sequence_1: ^ targname: ^ num_exp: ^ priority: ^ req_1: POS TARG 0,-31; req_2: SAME ORIENT FOR 7 AS 5; ! linenum: 8.000 sequence_1: ^ targname: ^ num_exp: ^ priority: ^ req_1: POS TARG 20,11; req_2: SAME ORIENT FOR 8 AS 4; req_3: SEQ 8-9 NO GAP; req_4: AFTER 4 BY 192M +/- 10M; ! linenum: 9.000 sequence_1: ^ targname: ^ num_exp: ^ priority: ^ req_1: POS TARG 0,-31; req_2: SAME ORIENT FOR 9 AS 5; ! ! end of exposure logsheet ! No scan data records found