0 Assigned ID: 933 ----- Attempting Submission 1 (Fri Apr 07 21:38:39 GMT 2017) ----- 0 ----- Attempting Submission 1 (Wed Jul 19 23:04:56 GMT 2017) ----- ----- Attempting Submission 2 (Fri May 25 17:56:37 GMT 2018) ----- ----- Attempting Submission 3 (Mon Jun 18 17:07:56 GMT 2018) ----- HST Phase II Proposal 15111 (Patroclus_Repeats.apt) successfully submitted. Receipt: # 15111-3 ----- Attempting Submission 4 (Thu Dec 13 16:52:51 GMT 2018) ----- The UV reflectance of Patroclus: Exploring the surface composition and origins of Jupiter Trojans (617) Patroclus is a binary system comprising two almost equally sized Trojan asteroids, Patroclus and Menoetius. (617) Patroclus has never been observed in the UV spectral region, which contains important diagnostic features of major Trojan surface constituents inferred from fits to visible-near IR spectra. Previous spectral observations have not been spatially resolved, precluding a direct spectral comparison of the two bodies. We propose to obtain full surface UV reflectance maps of both Patroclus and Menoetius using the STIS G230L mode, to search for characteristic absorption features of silicates, carbons/graphites and NH3, which together make up the major inferred Jupiter Trojan surface constituents, and for signs of ''spectral bluing'' that occurs for space-weathered objects. The Jupiter Trojans are believed to represent the most readily accessible Kuiper Belt material in the solar system, having been scattered from that region to their current orbits following a dynamical instability. A direct spectral comparison of Patroclus and Menoetius, indicating whether the objects share a common origin and evolution, will explore the hypothesis that the system is a rare binary survivor of this scattering. (617) Patroclus is also a target of the upcoming Lucy mission, and constraints on surface composition would represent a valuable input to instrument configuration and observation planning work for the mission. As Lucy will not carry a UV instrument, the proposed observations would remain unique and complementary to the results of the mission. The Patroclus-Menoetius binary system will be observed in six single-orbit visits. The time between visits should correspond to 60 +/- 10 degree orbital longitude intervals, but may span multiple Patroclus-Menoetius orbits. The orbital period of the system is ~103 hours, so the offset between visits should be ~17 +/- 3 hours (+ n*103 hours). The STIS slit should be oriented to allow the spectra of the two asteroids, which will appear in the East-West plane in cycle 25, to be separated. If possible, the observations should take place when Patroclus is within 5.2 AU of Earth to optimise the apparent size, brightness and separation of the asteroids, but the slit angle requirement is the more important constraint. Solar System 6 false false true false false false false SUPPORTED SOLAR SYSTEM ASTEROID Asteroid Patroclus TYPE=ASTEROID,A=5.218499694553197,E=0.1399500456355474,I=22.05269861079197,O=44.36596299545594,W=307.8595259822105,M=325.1954514012491,EQUINOX=J2000,EPOCH=08-JUN-2011:00:00:00,EpochTimeScale=TDB EARTH STIS/NUV-MAMA Spectroscopic No No G230L 2376 Using ephemeris for target 15111-01-PATROCLUS ephemeris data for target 15111-01-PATROCLUS does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.100 to 19.335. ephemeris interval: 18.334 to 20.336 Timing link suitability includes constraints ([02 After 01 by 4.9 to 5.1 days] [03 After 01 by 9.9 to 10.1 days] [04 After 01 by 14.9 to 15.1 days] [05 After 01 by 19.9 to 20.1 days] [06 After 01 by 24.9 to 25.1 days]) The scheduling data was generated by CASM 26.2.2. CASM was run in Phase II mode. During Cycle 25, the Patroclus-Menoetius mutual orbit will be oriented approximately in the East-West plane. The STIS slit should be positioned to allow the spectra of the two objects to be separated, ideally as close to 135 degrees or 315 degrees as possible. The timing interval shown here covers the period when Patroclus is within 5.2 AU of the Earth to maximize the size and separation of the objects. The slit orientation is the more important requirement. Subsequent visits should be offset to obtain observations at 60 degree +/- 10 degree orbital longitude intervals but the visits do not need to occur in a single orbital period. The orbital period is ~103 hours so the interval between visits should be 17 +/- 3 hours (+ n*103 hours if necessary, where n is any integer). 1525951713000 115.91450561182768 (Tic-Visit :proposal-id 15111 :visit-id "01" :proposal-version -1 :trans-version "20180409" :date "18-Jun-2018 12:05:33.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 226544 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15111 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15111 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2869 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 1 0 The exposure time was calculated using a Castelli-Kurucz Model G2V spectrum renormalized to vegamag = 15.9. The minimum exposure time for S:N = 40 is 0.64 seconds and the time to saturation is 98 seconds. A 10 second exposure will give S:N ~178. The ETC run used here assumes that the UV albedo of Patroclus is similar to that of Ganymede to ensure that no count rate limits will be exceeded. It is very unlikely that Patroclus will be brighter than this since its albedo is ~9 times smaller than that of Ganymede at visible wavelengths. (ETC run STIS.sp.937012 assumes a UV albedo a factor of ten lower than Ganymede's). Buffer time is Tex/2. Using ephemeris for target 15111-02-PATROCLUS ephemeris data for target 15111-02-PATROCLUS does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.100 to 19.335. ephemeris interval: 18.334 to 20.336 Timing link suitability includes constraints ([02 After 01 by 4.9 to 5.1 days]) The scheduling data was generated by CASM 26.2.2. CASM was run in Phase II mode. Orientation and timing requirements are identical to Visit 1. This visit should be offset from Visit 1 by 17 +/- 3 hours (+ n*103 hours) 1526383382000 132.0 (Tic-Visit :proposal-id 15111 :visit-id "02" :proposal-version -1 :trans-version "20180409" :date "18-Jun-2018 12:05:34.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 226544 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15111 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15111 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2869 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 1 0 Identical to Visit 1, Exposure 1 Identical to Visit 1, Exposure 2 Using ephemeris for target 15111-03-PATROCLUS ephemeris data for target 15111-03-PATROCLUS does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.100 to 19.335. ephemeris interval: 18.334 to 20.336 Timing link suitability includes constraints ([03 After 01 by 9.9 to 10.1 days]) The scheduling data was generated by CASM 26.2.2. CASM was run in Phase II mode. Orientation and timing requirements are identical to Visit 1. This visit should be offset from Visit 1 by 34 +/- 3 hours (+ n*103 hours) 1526815481000 133.9580997450771 (Tic-Visit :proposal-id 15111 :visit-id "03" :proposal-version -1 :trans-version "20180409" :date "18-Jun-2018 12:05:35.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 226544 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15111 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15111 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2869 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 1 0 Identical to Visit 1, Exposure 1 Identical to Visit 1, Exposure 2 Using ephemeris for target 15111-04-PATROCLUS ephemeris data for target 15111-04-PATROCLUS does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.100 to 19.335. ephemeris interval: 18.334 to 20.336 Timing link suitability includes constraints ([04 After 01 by 14.9 to 15.1 days]) The scheduling data was generated by CASM 26.2.2. CASM was run in Phase II mode. Orientation and timing requirements are identical to Visit 1. This visit should be offset from Visit 1 by 51 +/- 3 hours (+ n*103 hours) 1527241889000 116.69833207742539 (Tic-Visit :proposal-id 15111 :visit-id "04" :proposal-version -1 :trans-version "20180409" :date "18-Jun-2018 12:05:35.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 226544 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15111 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15111 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2869 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 1 0 Identical to Visit 1, Exposure 1 Identical to Visit 1, Exposure 2 Using ephemeris for target 15111-05-PATROCLUS ephemeris data for target 15111-05-PATROCLUS does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.100 to 19.335. ephemeris interval: 18.334 to 20.336 Timing link suitability includes constraints ([05 After 01 by 19.9 to 20.1 days]) The scheduling data was generated by CASM 26.2.2. CASM was run in Phase II mode. Orientation and timing requirements are identical to Visit 1. This visit should be offset from Visit 1 by 68 +/- 3 hours (+ n*103 hours) 1527671137000 119.36026392526168 (Tic-Visit :proposal-id 15111 :visit-id "05" :proposal-version -1 :trans-version "20180409" :date "18-Jun-2018 12:05:36.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 226544 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15111 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15111 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2869 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 1 0 Identical to Visit 1, Exposure 1 Identical to Visit 1, Exposure 2 Using ephemeris for target 15111-06-PATROCLUS ephemeris data for target 15111-06-PATROCLUS does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.100 to 19.335. ephemeris interval: 18.334 to 20.336 Timing link suitability includes constraints ([06 After 01 by 24.9 to 25.1 days]) The scheduling data was generated by CASM 26.2.2. CASM was run in Phase II mode. Orientation and timing requirements are identical to Visit 1. This visit should be offset from Visit 1 by 85 +/- 3 hours (+ n*103 hours) 1528105885000 112.05923282855412 (Tic-Visit :proposal-id 15111 :visit-id "06" :proposal-version -1 :trans-version "20180409" :date "18-Jun-2018 12:05:36.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 226544 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15111 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15111 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2869 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 1 0 Identical to Visit 1, Exposure 1 Identical to Visit 1, Exposure 2 Using ephemeris for target 15111-51-PATROCLUS ephemeris data for target 15111-51-PATROCLUS does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.100 to 19.335. ephemeris interval: 18.334 to 20.336 The scheduling data was generated by CASM 26.2.2. CASM was run in Phase II mode. Repeat of failed visit 01 The Patroclus-Menoetius mutual orbit will be oriented approximately in the East-West plane. The STIS slit should be positioned to allow the spectra of the two objects to be separated, ideally as close to 135 degrees or 315 degrees as possible. The timing interval shown here covers the period when Patroclus is within 5.5 AU of the Earth to maximize the size and separation of the objects. This requirement will ensure we get similar count rates to those we expected from the earlier failed observation. (Tic-Visit :proposal-id 15111 :visit-id "51" :proposal-version -1 :trans-version "20180409" :date "18-Jun-2018 12:03:50.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 226544 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15111 :visit-id "51" :obset-id "51" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15111 :visit-id "51" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2869 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) false 1 0 The exposure time was calculated using a Castelli-Kurucz Model G2V spectrum renormalized to vegamag = 15.9. The minimum exposure time for S:N = 40 is 0.64 seconds and the time to saturation is 98 seconds. A 10 second exposure will give S:N ~178. The ETC run used here assumes that the UV albedo of Patroclus is similar to that of Ganymede to ensure that no count rate limits will be exceeded. It is very unlikely that Patroclus will be brighter than this since its albedo is ~9 times smaller than that of Ganymede at visible wavelengths. (ETC run STIS.sp.937012 assumes a UV albedo a factor of ten lower than Ganymede's). Buffer time is Tex/2. Using ephemeris for target 15111-55-PATROCLUS ephemeris data for target 15111-55-PATROCLUS does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.100 to 19.335. ephemeris interval: 18.334 to 20.336 The scheduling data was generated by CASM 26.2.2. CASM was run in Phase II mode. Repeat of failed visit 05 The Patroclus-Menoetius mutual orbit will be oriented approximately in the East-West plane. The STIS slit should be positioned to allow the spectra of the two objects to be separated, ideally as close to 135 degrees or 315 degrees as possible. The timing interval shown here covers the period when Patroclus is within 5.5 AU of the Earth to maximize the size and separation of the objects. This requirement will ensure we get similar count rates to those we expected from the earlier failed observation. (Tic-Visit :proposal-id 15111 :visit-id "55" :proposal-version -1 :trans-version "20180409" :date "18-Jun-2018 12:03:19.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 226544 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15111 :visit-id "55" :obset-id "55" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15111 :visit-id "55" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2869 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) false 1 0 The exposure time was calculated using a Castelli-Kurucz Model G2V spectrum renormalized to vegamag = 15.9. The minimum exposure time for S:N = 40 is 0.64 seconds and the time to saturation is 98 seconds. A 10 second exposure will give S:N ~178. The ETC run used here assumes that the UV albedo of Patroclus is similar to that of Ganymede to ensure that no count rate limits will be exceeded. It is very unlikely that Patroclus will be brighter than this since its albedo is ~9 times smaller than that of Ganymede at visible wavelengths. (ETC run STIS.sp.937012 assumes a UV albedo a factor of ten lower than Ganymede's). Buffer time is Tex/2. Using ephemeris for target 15111-56-PATROCLUS ephemeris data for target 15111-56-PATROCLUS does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 18.100 to 19.335. ephemeris interval: 18.334 to 20.336 The scheduling data was generated by CASM 26.2.2. CASM was run in Phase II mode. Repeat of failed visit 06 The Patroclus-Menoetius mutual orbit will be oriented approximately in the East-West plane. The STIS slit should be positioned to allow the spectra of the two objects to be separated, ideally as close to 135 degrees or 315 degrees as possible. The timing interval shown here covers the period when Patroclus is within 5.5 AU of the Earth to maximize the size and separation of the objects. This requirement will ensure we get similar count rates to those we expected from the earlier failed observation. (Tic-Visit :proposal-id 15111 :visit-id "56" :proposal-version -1 :trans-version "20180409" :date "18-Jun-2018 12:03:34.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 226544 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15111 :visit-id "56" :obset-id "56" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15111 :visit-id "56" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2869 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) false 1 0 The exposure time was calculated using a Castelli-Kurucz Model G2V spectrum renormalized to vegamag = 15.9. The minimum exposure time for S:N = 40 is 0.64 seconds and the time to saturation is 98 seconds. A 10 second exposure will give S:N ~178. The ETC run used here assumes that the UV albedo of Patroclus is similar to that of Ganymede to ensure that no count rate limits will be exceeded. It is very unlikely that Patroclus will be brighter than this since its albedo is ~9 times smaller than that of Ganymede at visible wavelengths. (ETC run STIS.sp.937012 assumes a UV albedo a factor of ten lower than Ganymede's). Buffer time is Tex/2.