6846( 10) - 03/08/96 15:30 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6846 Version: 10 Check-in Date: 08-Mar-1996 14:19:44 1.Proposal Title: Observations of Neptune and Pluto for the "Live From HST" Television Program ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle SOLAR SYSTEM GO/DD 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Hedi Hammel Massachusetts Institute of Technology CoI: Marc Buie Lowell Observatory N ------------------------------------------------------------------------------------ 6. Abstract This program performs 3 HST orbits of solar system observations selected by students involved in the Passport to Knowledge program. There will be 1 orbit of FOC observations of Pluto and 2 orbits of WFPC2 observations of Neptune. Neptune's atmosphere is extremely dynamic. With a series of images, we will determine a relaxation time for changes in vertical aerosol structure by observing Neptune at the same wavelengths as was done in Cycle 4 and Cycle 5. Specifically, we propose to obtain images of Neptune with the Planetary Camera at wavelengths from 410 to 889 nanometers. We will model the aerosol structure by measuring both the general center -to-limb behavior as a function of latitude, and the wavelength-dependent reflectivity of discrete features. If Neptune's clouds have changed yet again, we will study the new structure. The data are part of an educational program called Live from Hubble Space Telescope, and that participation drive s some of the timing of the observations. ------------------------------------------------------------------------------------ 6846( 10) - 03/08/96 15:30 - [ 2] Observations Description ------------------------ We request 4 (6 if time) exposures of Neptune with the WFPC2 in Planetary Camera mode in each of 2 orbits. The exposures in each orbit are (F410M if time), F467M, F547M, (FQCH4N15 if time), and two each at FQCH4P15. The start times of the two orbits should be separated in time by 8 hours to cover all Neptune longitudes. Real Time Justification ----------------------- Special Scheduling Requirement for timing: We request time near 13 March 1996 to coordinate the observations with a live broadcast on 14 March 1996 showing the return of the data from the second orbit. This will maximize the educational aspects of the observations. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: STSCI Ship Via: Email: aroman@stsci.edu , ------------------------------------------------------------------------------------ 6846( 10) - 03/08/96 15:30 - [ 3] TARGET LIST b)Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 | TARGET NAME: PLUTO ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: PLANET Pluto ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=PLUTO | | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | V = 13.7 | Marc Buie indicates that the JPL B-V = 0.7 | ephemeris used by MOSS for Pluto may | not be the best and most recent. | This will be investigated. | ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 2 | TARGET NAME: NEPTUNE ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: PLANET Neptune ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=NEPTUNE | | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | V = 8.8 | The window around 13/14 March 1996 F(4682.0)=3.51e-12 | is requested to coordinate with a F(5454.0)=26.6e-13 | live TV broadcast. If this window is F(6265.0)=3.77e-13 | unavailable, then we can relax the F(8940.0)=9.98e-14 | constraint somewhat. Contact PI H. | Hammel (MIT). | ------------------------------------------------------------------------------------------------------------------------------------ 6846( 10) - 03/08/96 15:30 - [ 4] Visit: 01 Visit Requirements: ON HOLD BETWEEN 04-Mar-1996:05:11:23.0 AND 04-Mar-1996:07:11:23.0 On Hold Comments: Waiting for updated Pluto ephemeris from JPL. Additional Comments: If the specified BETWEEN window is not schedulable, there are alternates available. They are listed here in priority order: 16-Mar-1996:23:47:15 to 17-Mar-1996:01:47:15, 7-Mar-1996:13:14:40 to 7-Mar-1996:15:14:40, 13-Mar- 1996:22:32:36 to 14-Mar-1996:00:32:36, 5-Mar-1996:19:56:22 to 5-Mar- 1996:21:56:22, 12-Mar-1996:05:14:15 to 12-Mar-1996:07:14:15, 9-Mar- 1996:01:51:56 to 9-Mar-1996:03:51:56, or 15-Mar-1996:11:09:55 to 15-Mar- 1996:13:09:55. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 PLUTO FOC/96 IMAGE 512X512 F410M,F2N 1 900S NO SPLIT D,F1ND ------------------------------------------------------------------------------------------------------------------------------------ 20 PLUTO FOC/96 IMAGE 512X512 F278M,F27 1 900S END ORBIT NO SPLIT 5W ------------------------------------------------------------------------------------------------------------------------------------ 6846( 10) - 03/08/96 15:30 - [ 5] Visit: 02 Visit Requirements: BETWEEN 04-Mar-1996 AND 15-Mar-1996 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 NEPTUNE WFPC2 IMAGE FQCH4N1 F410M 1 100S 5 ------------------------------------------------------------------------------------------------------------------------------------ 20 NEPTUNE WFPC2 IMAGE FQCH4N1 F467M 1 40S 5 ------------------------------------------------------------------------------------------------------------------------------------ 30 NEPTUNE WFPC2 IMAGE FQCH4N1 F547M 1 14S 5 ------------------------------------------------------------------------------------------------------------------------------------ 40 NEPTUNE WFPC2 IMAGE FQCH4N1 FQCH4N15 6211.0 1 400S 5 ------------------------------------------------------------------------------------------------------------------------------------ 50 NEPTUNE WFPC2 IMAGE FQCH4P1 FQCH4P15 8922.0 1 400S 5 Comments: Can be shortened somewhat if necessary. ------------------------------------------------------------------------------------------------------------------------------------ 60 NEPTUNE WFPC2 IMAGE FQCH4P1 FQCH4P15 8922.0 1 400S 5 Comments: Can be shortened somewhat if necessary. ------------------------------------------------------------------------------------------------------------------------------------ 6846( 10) - 03/08/96 15:30 - [ 6] Visit: 03 Visit Requirements: AFTER 02 BY 7.5H TO 8.5H On Hold Comments: Additional Comments: 8 hours after 02 is optimum. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 NEPTUNE WFPC2 IMAGE FQCH4N1 F410M 1 100S 5 ------------------------------------------------------------------------------------------------------------------------------------ 20 NEPTUNE WFPC2 IMAGE FQCH4N1 F467M 1 40S 5 ------------------------------------------------------------------------------------------------------------------------------------ 30 NEPTUNE WFPC2 IMAGE FQCH4N1 F547M 1 14S 5 ------------------------------------------------------------------------------------------------------------------------------------ 40 NEPTUNE WFPC2 IMAGE FQCH4N1 FQCH4N15 6211.0 1 400S 5 ------------------------------------------------------------------------------------------------------------------------------------ 50 NEPTUNE WFPC2 IMAGE FQCH4P1 FQCH4P15 8922.0 1 400S 5 Comments: Can be shortened somewhat if necessary. ------------------------------------------------------------------------------------------------------------------------------------ 60 NEPTUNE WFPC2 IMAGE FQCH4P1 FQCH4P15 8922.0 1 400S 5 Comments: Can be shortened somewhat if necessary. ------------------------------------------------------------------------------------------------------------------------------------ 6846( 10) - 03/08/96 15:30 - [ 7] Summary Form for Proposal 6846 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOC/96 WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO/DD ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category SOLAR SYSTEM ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ON HOLD BETWEEN 04-Mar-1996 05 11 23.0 AND 04-Mar-1996 07 11 23.0 NO SPLIT END ORBIT NO SPLIT BETWEEN 04-Mar-1996 AND 15-Mar-1996 AFTER 02 BY 7.5H TO 8.5H ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F410M,F2ND,F1ND F278M,F275W F410M F467M F547M FQCH4N15 FQCH4P15 ------------------------------------------------------------------------------------------------------------------------------------ Target Names PLUTO NEPTUNE ------------------------------------------------------------------------------------------------------------------------------------