0Assigned ID: 855
----- Attempting Submission 1 (Fri Apr 07 20:44:07 GMT 2017) -----
HST Phase I Proposal 855 (Verbiscer_Cycle25_phase1-GO-APT_v1.pdf.apt) successfully submitted.
Receipt: # 855-1
----- Attempting Submission 2 (Fri Apr 07 22:57:26 GMT 2017) -----Revised submission. FLASH warnings resolved.-1315574193----- Attempting Submission 1 (Thu Jul 20 19:15:26 GMT 2017) -----The Pluto System in the Post-New Horizons Era: Opposition Effects, Rotations, and Orbital StabilityFollowing the New Horizons flyby in 2015, we propose a two-cycle program to observe Pluto and its five moons in the post-encounter era, building on the rich legacy of observations obtained during and prior to the historic flyby. At opposition in Cycles 25-26, the Pluto system is visible at the smallest solar phase angle in 87 years. The system will be at true opposition when it crosses the line of nodes in July 2018, and as seen from Pluto, Earth will transit the solar disk. Such rare planetary alignments enable the characterization of small-scale surface texture and porosity as well as the direct measurement of the geometric albedo, rather than an estimation of its value from photometric models. Any variation among the regolith properties of Pluto's moons will test the long-standing hypothesis that ejecta exchange between the moons has altered their surfaces. We will also follow up on the surprising result from New Horizons and HST that the small moons are spinning rapidly and with high obliquities. Styx, Nix, and Hydra show hints of being in strong spin-orbit couplings with Charon, but confirmation requires the additional precision in measurements of their spin rates and polar precession rates proposed here. In addition, we will obtain new astrometry of the small moons, making it possible to determine their masses and bulk densities with much higher precision. Results from this program will enhance the scientific return from the New Horizons mission, providing images complementary to those obtained by the spacecraft on approach and achieving science objectives that cannot be met by either HST or New Horizons alone.This program consists of two types of visit types. Five visits are primarily for photometry within specific phase angle ranges near opposition, to study the opposition surge on all the bodies in the Pluto system. Eight visits are for astrometry and photometry, primarily to determine the orbits and rotation states of the four small moons. Rotation states are also needed to interpret the data near opposition. Four of these visits are scheduled before opposition and four after to ensure a long time baseline for orbit and rotation determinations. PERIOD constraints are included to ensure that we sample all rotational phases of tiny Styx, whose rotation state has been the most difficult to obtain with HST. ORIENT values have been selected so that the smallest moons, Kerberos and Styx, never land on the diffraction spikes of Pluto. The filters used here match those in Program 13667, so that the combined data sets sample a much longer time baseline and extend the phase angle coverage down to the very small phase angles not available to Program 13667 in 2015.Solar System6falsefalsefalsefalsefalsefalsefalseSUPPORTEDSOLAR SYSTEMDWARF-PLANETPlutoSTD=PLUTOEARTHSOLAR SYSTEMDWARF-PLANETPluto with Styx and Kerberos off Pluto's diffraction spikes, Styx off the saturation bloom, when ORIENT = 80 or 260STD=PLUTONOT OLG OF STYX BETWEEN 21 51,
NOT OLG OF STYX BETWEEN 70 100,
NOT OLG OF STYX BETWEEN 121 151,
NOT OLG OF STYX BETWEEN 201 231,
NOT OLG OF STYX BETWEEN 250 280,
NOT OLG OF STYX BETWEEN 301 331,
NOT OLG OF KERBEROS BETWEEN 23 49,
NOT OLG OF KERBEROS BETWEEN 123 149,
NOT OLG OF KERBEROS BETWEEN 203 229,
NOT OLG OF KERBEROS BETWEEN 303 329,
SEP OF CHARON STYX FROM EARTH GT 1.8",
SEP OF CHARON KERBEROS FROM EARTH GT 1.6"EARTHWFC3/UVISImagingNoNoF350LPWFC3/UVISImagingNoNoF438WWFC3/UVISImagingNoNoF555WWFC3/UVISImagingNoNoF625WWFC3/UVISImagingNoNoF775WWFC3/UVISImagingNoNoF845MWFC3/UVISImagingNoNoF350LPUsing ephemeris for target 15261-01-PLUTOephemeris data for target 15261-01-PLUTO does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.038 to 19.152. ephemeris interval: 18.151 to 20.153The scheduling data was generated by CASM 26.0.CASM was run in Phase II mode./solaris/user1/aroman/work/hst/OP-cache/15261-v01.xmlColor photometry of Pluto and Charon at exact opposition. Additional long exposures to capture the small moons. Two POS TARGs designed to shift the system by 5.5 pixels along each axis midway through the visit. ORIENT adjusted to 66 or 246 in order to keep the moons away from the diffraction spikes of Pluto and Charon.
This visit images a rotational longitude between 188 and 195 on Styx.
Note: Changing the schedulability setting from 100 to 30 did not affect the valid observing windows at all, but it gave us several extra minutes of integration time on our targets.1531394426000152.0(Tic-Visit
:proposal-id 15261
:visit-id "01"
:proposal-version -1
:trans-version "20180409"
:date "13-Jun-2018 08:58:17.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 114416
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
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:visit-id "01"
:obset-id "01"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15261
:visit-id "01"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2707
:al-overhead-at-end 0
:internal-dur-at-end 162
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)false10Using ephemeris for target 15261-02-PLUTOephemeris data for target 15261-02-PLUTO does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.038 to 19.152. ephemeris interval: 18.151 to 20.153The scheduling data was generated by CASM 26.0.CASM was run in Phase II mode./solaris/user1/aroman/work/hst/OP-cache/15261-v02.xmlBroadband photometry of the small moons at 0.017 to 0.023 degrees phase. Additional short exposures to study year-by-year changes in Pluto's rotation curve. ORIENT adjusted to 66 or 246 in order to keep the moons away from the diffraction spikes of Pluto and Charon.
If this visit is scheduled before opposition, it images rotational longitude between 105 and 125 on Styx; if it is scheduled after opposition, it images a rotational longitude between 250 and 270 on Styx;
Note: Changing the schedulability setting from 100 to 30 did not affect the valid observing windows at all, but it gave us several extra minutes of integration time on our targets.1531325789000245.0(Tic-Visit
:proposal-id 15261
:visit-id "02"
:proposal-version -1
:trans-version "20180409"
:date "13-Jun-2018 08:57:35.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 73232
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
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:visit-id "02"
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(Tic-Orbit
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:visit-id "02"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2678
:al-overhead-at-end 0
:internal-dur-at-end 117
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)false10Using ephemeris for target 15261-03-PLUTOephemeris data for target 15261-03-PLUTO does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.038 to 19.152. ephemeris interval: 18.151 to 20.153The scheduling data was generated by CASM 26.0.CASM was run in Phase II mode.49/solaris/user1/aroman/work/hst/OP-cache/15261-v03.xmlBroadband photometry of the small moons at 0.04 to 0.06 degrees phase. Additional short exposures to study year-by-year changes in Pluto's rotation curve. ORIENT adjusted to 68 or 248 in order to keep the moons away from the diffraction spikes of Pluto and Charon. The opportunity to observe the equivalent phase angle before opposition is unusable because Charon is too close to Styx.
This visit images a rotational longitude between 340 and 100 on Styx.
Note: Changing the schedulability setting from 100 to 30 did not affect the valid observing windows at all, but it gave us several extra minutes of integration time on our targets.1531234271000193.0(Tic-Visit
:proposal-id 15261
:visit-id "03"
:proposal-version -1
:trans-version "20180409"
:date "13-Jun-2018 08:54:49.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 73232
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15261
:visit-id "03"
:obset-id "03"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15261
:visit-id "03"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2603
:al-overhead-at-end 0
:internal-dur-at-end 117
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 2940.0
:pcs-gap 0
)true10Using ephemeris for target 15261-04-PLUTOephemeris data for target 15261-04-PLUTO does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.038 to 19.152. ephemeris interval: 18.151 to 20.153The scheduling data was generated by CASM 26.0.CASM was run in Phase II mode./solaris/user1/aroman/work/hst/OP-cache/15261-v04.xmlBroadband photometry of the small moons at 0.09 to 0.12 degrees phase. Additional short exposures to study year-by-year changes in Pluto's rotation curve. ORIENT adjusted to 87 in order to keep the moons away from the diffraction spikes of Pluto and Charon. This opportunity is better than the equivalent opportunity before opposition because of the better positions of the moons relative to Charon and the diffraction spikes.
This visit images a rotational longitude between 170 and 280 on Styx.
Note: Changing the schedulability setting from 100 to 30 did not affect the valid observing windows at all, but it gave us several extra minutes of integration time on our targets.153165753500091.0(Tic-Visit
:proposal-id 15261
:visit-id "04"
:proposal-version -1
:trans-version "20180409"
:date "13-Jun-2018 08:53:50.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 73232
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15261
:visit-id "04"
:obset-id "04"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15261
:visit-id "04"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2734
:al-overhead-at-end 0
:internal-dur-at-end 117
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)true10Using ephemeris for target 15261-05-PLUTOephemeris data for target 15261-05-PLUTO does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.038 to 19.152. ephemeris interval: 18.151 to 20.153The scheduling data was generated by CASM 26.0.CASM was run in Phase II mode./solaris/user1/aroman/work/hst/OP-cache/15261-v05.xmlBroadband photometry of the small moons at 0.18 to 0.22 degrees phase. Additional short exposures to study year-by-year changes in Pluto's rotation curve. ORIENT adjusted to 274 in order to keep the moons away from the diffraction spikes of Pluto and Charon. This opportunity is better than the equivalent opportunity after opposition because Styx will be too close to Charon at that time.
This visit images a rotational longitude between 90 and 190 on Styx.
Note: Changing the schedulability setting from 100 to 30 did not affect the valid observing windows at all, but it gave us several extra minutes of integration time on our targets.1530788090000231.0(Tic-Visit
:proposal-id 15261
:visit-id "05"
:proposal-version -1
:trans-version "20180409"
:date "13-Jun-2018 08:52:33.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 73232
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15261
:visit-id "05"
:obset-id "05"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15261
:visit-id "05"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2706
:al-overhead-at-end 0
:internal-dur-at-end 117
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)true10Using ephemeris for target 15261-10-PLUTO-W-MOONS-ORIENT-80The scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.Long exposures for the small moons through filter F350LP. Timed to prevent Styx and Kerberos from landing inside the diffraction spikes of Pluto, and to place Charon on the opposite side of the planet. POS TARG values re-position Pluto in steps of exactly 5.5 pixels along each axis.
Styx at rotational longitude 0-90 assuming a 3.24 day period.
Scheduled before opposition, with phase > 0.3 degrees.
Timing restricted to March 2018 to ensure a long time baseline during 2018.
Note: Changing the schedulability setting from 100 to 30 did not affect the valid observing windows at all, but it gave us several extra minutes of integration time on our targets.1520381296000263.0(Tic-Visit
:proposal-id 15261
:visit-id "10"
:proposal-version -1
:trans-version "20170613"
:date "20-Jul-2017 11:39:00.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 73232
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15261
:visit-id "10"
:obset-id "10"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15261
:visit-id "10"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2784
:al-overhead-at-end 0
:internal-dur-at-end 117
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)false10Using ephemeris for target 15261-11-PLUTO-W-MOONS-ORIENT-80The scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.Long exposures for the small moons through filter F350LP. Timed to prevent Styx and Kerberos from landing inside the diffraction spikes of Pluto, and to place Charon on the opposite side of the planet. POS TARG values re-position Pluto in steps of exactly 5.5 pixels along each axis.
Styx at rotational longitude 90-180 assuming a 3.24 day period.
Scheduled before opposition, with phase > 0.3 degrees.
Timing restricted to May-June 2018 to ensure a long time baseline during 2018.
Note: Changing the schedulability setting from 100 to 30 did not affect the valid observing windows at all, but it gave us several extra minutes of integration time on our targets.1527698358000261.0(Tic-Visit
:proposal-id 15261
:visit-id "11"
:proposal-version -1
:trans-version "20170613"
:date "20-Jul-2017 11:07:07.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 73232
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15261
:visit-id "11"
:obset-id "11"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15261
:visit-id "11"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2811
:al-overhead-at-end 0
:internal-dur-at-end 117
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)false10Using ephemeris for target 15261-12-PLUTO-W-MOONS-ORIENT-80The scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.Long exposures for the small moons through filter F350LP. Timed to prevent Styx and Kerberos from landing inside the diffraction spikes of Pluto, and to place Charon on the opposite side of the planet. POS TARG values re-position Pluto in steps of exactly 5.5 pixels along each axis.
Styx at rotational longitude 180-270 assuming a 3.24 day period.
Scheduled before opposition, with phase > 0.3 degrees.
Timing restricted to before May to ensure a long time baseline during 2018.
Note: Changing the schedulability setting from 100 to 30 did not affect the valid observing windows at all, but it gave us several extra minutes of integration time on our targets.1521336659000256.6(Tic-Visit
:proposal-id 15261
:visit-id "12"
:proposal-version -1
:trans-version "20170613"
:date "20-Jul-2017 11:07:08.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 73232
:tdrss-contact-duration 0
:coron NIL
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(Tic-Obset
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:visit-id "12"
:obset-id "12"
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(Tic-Orbit
:proposal-id 15261
:visit-id "12"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2802
:al-overhead-at-end 0
:internal-dur-at-end 117
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)false10Using ephemeris for target 15261-13-PLUTO-W-MOONS-ORIENT-80The scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.Long exposures for the small moons through filter F350LP. Timed to prevent Styx and Kerberos from landing inside the diffraction spikes of Pluto, and to place Charon on the opposite side of the planet. POS TARG values re-position Pluto in steps of exactly 5.5 pixels along each axis.
Styx at rotational longitude 270-360 assuming a 3.24 day period.
Scheduled before opposition, with phase > 0.3 degrees.
Timing restricted to April-May 2018 to ensure a long time baseline during 2018.
Note: Changing the schedulability setting from 100 to 30 did not affect the valid observing windows at all, but it gave us several extra minutes of integration time on our targets.1524454929000261.0(Tic-Visit
:proposal-id 15261
:visit-id "13"
:proposal-version -1
:trans-version "20170613"
:date "20-Jul-2017 11:07:10.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 73232
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15261
:visit-id "13"
:obset-id "13"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15261
:visit-id "13"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2839
:al-overhead-at-end 0
:internal-dur-at-end 117
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)false10Using ephemeris for target 15261-20-PLUTO-W-MOONS-ORIENT-80The scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.Long exposures for the small moons through filter F350LP. Timed to prevent Styx and Kerberos from landing inside the diffraction spikes of Pluto, and to place Charon on the opposite side of the planet. POS TARG values re-position Pluto in steps of exactly 5.5 pixels along each axis.
Styx at rotational longitude 0-90 assuming a 3.24 day period.
Scheduled before opposition, with phase > 0.3 degrees.
Timing restricted to August-September 2018 to ensure a long time baseline during 2018.
Note: Changing the schedulability setting from 100 to 30 did not affect the valid observing windows at all, but it gave us several extra minutes of integration time on our targets.153572531000081.0(Tic-Visit
:proposal-id 15261
:visit-id "20"
:proposal-version -1
:trans-version "20170613"
:date "20-Jul-2017 11:07:11.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 73232
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15261
:visit-id "20"
:obset-id "20"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15261
:visit-id "20"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2799
:al-overhead-at-end 0
:internal-dur-at-end 117
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)false10Using ephemeris for target 15261-21-PLUTO-W-MOONS-ORIENT-80The scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.Long exposures for the small moons through filter F350LP. Timed to prevent Styx and Kerberos from landing inside the diffraction spikes of Pluto, and to place Charon on the opposite side of the planet. POS TARG values re-position Pluto in steps of exactly 5.5 pixels along each axis.
Styx at rotational longitude 90-180 assuming a 3.24 day period.
Scheduled after opposition, with phase > 0.3 degrees.
Timing restricted to late September 2018 to ensure a long time baseline during 2018.
Note: Changing the schedulability setting from 100 to 30 did not affect the valid observing windows at all, but it gave us several extra minutes of integration time on our targets.(Tic-Visit
:proposal-id 15261
:visit-id "21"
:proposal-version -1
:trans-version "20170613"
:date "20-Jul-2017 11:07:12.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 73232
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15261
:visit-id "21"
:obset-id "21"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15261
:visit-id "21"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2824
:al-overhead-at-end 0
:internal-dur-at-end 117
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)false10Using ephemeris for target 15261-22-PLUTO-W-MOONS-ORIENT-80The scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.Long exposures for the small moons through filter F350LP. Timed to prevent Styx and Kerberos from landing inside the diffraction spikes of Pluto, and to place Charon on the opposite side of the planet. POS TARG values re-position Pluto in steps of exactly 5.5 pixels along each axis.
Styx at rotational longitude 180-270 assuming a 3.24 day period.
Scheduled after opposition, with phase > 0.3 degrees.
Timing restricted to July-August 2018 to ensure a long time baseline during 2018.
Note: Changing the schedulability setting from 100 to 30 did not affect the valid observing windows at all, but it gave us several extra minutes of integration time on our targets.153424372600081.0(Tic-Visit
:proposal-id 15261
:visit-id "22"
:proposal-version -1
:trans-version "20170613"
:date "20-Jul-2017 11:07:14.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 73232
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15261
:visit-id "22"
:obset-id "22"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15261
:visit-id "22"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2738
:al-overhead-at-end 0
:internal-dur-at-end 117
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)false10Using ephemeris for target 15261-23-PLUTO-W-MOONS-ORIENT-80ephemeris data for target 15261-23-PLUTO-W-MOONS-ORIENT-80 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.038 to 19.213. ephemeris interval: 18.212 to 20.214The scheduling data was generated by CASM 26.0.CASM was run in Phase II mode.Long exposures for the small moons through filter F350LP. Timed to prevent Styx and Kerberos from landing inside the diffraction spikes of Pluto, and to place Charon on the opposite side of the planet. POS TARG values re-position Pluto in steps of exactly 5.5 pixels along each axis.
Styx at rotational phase longitude 270-360 assuming a 3.24 day period.
Scheduled after opposition, with phase > 0.3 degrees.
Timing restricted to September 2018 to ensure a long time baseline during 2018.
Note: Changing the schedulability setting from 100 to 30 did not affect the valid observing windows at all, but it gave us several extra minutes of integration time on our targets.153398632500087.0(Tic-Visit
:proposal-id 15261
:visit-id "23"
:proposal-version -1
:trans-version "20180409"
:date "01-Aug-2018 11:09:42.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 73232
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15261
:visit-id "23"
:obset-id "23"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15261
:visit-id "23"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2738
:al-overhead-at-end 0
:internal-dur-at-end 117
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)false10