Fomalhaut is a bright nearby star that harbors a belt of dusty material with a morphology that has been used to predict the presence of a shepherding planet. With ACS/HRC coronagraphy, we have achieved the direct detection of a planet candidate (Fomalhaut b) in F606W and F814W. The planet candidate lies 18 AU interior to the dust belt and we detect counterclockwise orbital motion in two epochs of observations (2004 and 2006). Fomalhaut b has mass no greater than three Jupiter masses based on an analysis of its luminosity, including non-detections at infrared wavelengths, and the dynamical argument that a significantly more massive object would disrupt the dust belt. Variability at optical wavelengths and the brightness in the F606W passband suggest additional sources of luminosity such as starlight reflected from a circumplanetary ring system. A second possibility that has been invoked for substellar objects is a significant contribution of H-alpha emission. Here we propose follow-up WFPC2 observations to test the possibility that the F606W flux is contaminated by H-alpha emission. We demonstrate that the detection of Fomalhaut b using WFPC2 is feasible using roll deconvolution. Furthermore, a detection of Fomalhaut b in 2009 will provide a crucial third epoch for astrometry. With the existing two epochs of data, the orbit of Fomalhaut b cannot be determined uniquely. The third epoch will be used to test the prediction of apsidal alignment and more accurately determine the dynamical mass of Fomalhaut b. If apsidal mis-alignment is found between the planet and the belt, this result would point to the existence of still other planets lurking unseen in the Fomalhaut system.

The goal is to achieve high contrast for point sources beyond 10 arcseconds radius from the bright star Fomalhaut using the roll deconvolution technique that has been successful in the past (e.g. with Beta Pictoris in GO-5700). Fomahaut will be acquired on the PC so that the much fainter planet candidate Fomalhaut b will land on a wide-field CCD. Absolute orients are chosen so that Fomalhaut b falls correctly within the WF field. To achieve roll subtraction, consecutive orbits have an ORIENT FROM command of 1.2 degree from the previous orbit. Each orbit is an individual visit. Visits 01-09 are the same as 10-18, except that the former set uses the F606W filter and the latter set use the F656N filter. We want to minimize PSF breathing, which means that Visits 01-09 should be scheduled in consecutive orbits, if possible. The same goes for Visits 10-18. Guide star availability should be checked as soon as possible because sometimes this has been a problem for Fomalhaut observations. Also, the APT shows a scheduling window available beginning April 22, 2009, which is a few weeks before the scheduled servicing mission. EXTRA-SOLAR PLANETS 12 false 0.0 0.0 false false false false false SUPPORTED STAR A0-A3 V-IV This object was generated by the targetselector and retrieved from the SIMBAD database. HD216956 HR8728 J2000 22 57 39.0465 -29 37 20.05 J2000 WFPC2 Imaging No F606W WFPC2 Imaging No F656N WFPC2 Imaging No F606W WFPC2 Imaging No F656N WFPC2 Imaging No F606W WFPC2 Imaging No F656N WFPC2 Imaging No F606W WFPC2 Imaging No F656N WFPC2 Imaging No F606W WFPC2 Imaging No F656N WFPC2 Imaging No F606W WFPC2 Imaging No F656N WFPC2 Imaging No F606W WFPC2 Imaging No F656N WFPC2 Imaging No F606W WFPC2 Imaging No F656N WFPC2 Imaging No F606W WFPC2 Imaging No F656N Timing link suitability includes constraints ([Group (01 02 03 04 05 06 07 08 09) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240358814000 228.60000000000002 (Tic-Visit :proposal-id 11979 :visit-id "01" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 21:26:03.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "01" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Group (01 02 03 04 05 06 07 08 09) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240364650000 229.8 (Tic-Visit :proposal-id 11979 :visit-id "02" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 21:29:47.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "02" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Group (01 02 03 04 05 06 07 08 09) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240370402000 231.0 (Tic-Visit :proposal-id 11979 :visit-id "03" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 21:29:48.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "03" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Group (01 02 03 04 05 06 07 08 09) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240353144000 232.20000000000005 (Tic-Visit :proposal-id 11979 :visit-id "04" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 21:29:48.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "04" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Group (01 02 03 04 05 06 07 08 09) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240376155000 233.40000000000003 (Tic-Visit :proposal-id 11979 :visit-id "05" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 21:29:49.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "05" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Group (01 02 03 04 05 06 07 08 09) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240433683000 234.5 (Tic-Visit :proposal-id 11979 :visit-id "06" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 21:29:49.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "06" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Group (01 02 03 04 05 06 07 08 09) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240439436000 235.10000000000002 (Tic-Visit :proposal-id 11979 :visit-id "07" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 21:29:50.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "07" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Group (01 02 03 04 05 06 07 08 09) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240445188000 235.7 (Tic-Visit :proposal-id 11979 :visit-id "08" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 21:29:50.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "08" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Group (01 02 03 04 05 06 07 08 09) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240427930000 236.30000000000007 (Tic-Visit :proposal-id 11979 :visit-id "09" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 21:29:51.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "09" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Group (10 11 12 13 14 15 16 17 18) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240514139000 229.5 (Tic-Visit :proposal-id 11979 :visit-id "10" :proposal-version -1 :trans-version "20090130" :date "16-Apr-2009 07:31:25.0" :trans-errors '(:WARNINGS 6 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "10" :orbit-number 1 :pcs-time 269 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([Group (10 11 12 13 14 15 16 17 18) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240519892000 230.7 (Tic-Visit :proposal-id 11979 :visit-id "11" :proposal-version -1 :trans-version "20090130" :date "16-Apr-2009 07:30:22.0" :trans-errors '(:WARNINGS 6 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "11" :orbit-number 1 :pcs-time 269 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([Group (10 11 12 13 14 15 16 17 18) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240525728000 231.89999999999998 (Tic-Visit :proposal-id 11979 :visit-id "12" :proposal-version -1 :trans-version "20090130" :date "16-Apr-2009 07:30:27.0" :trans-errors '(:WARNINGS 6 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "12" :orbit-number 1 :pcs-time 269 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([Group (10 11 12 13 14 15 16 17 18) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240531480000 233.1 (Tic-Visit :proposal-id 11979 :visit-id "13" :proposal-version -1 :trans-version "20090130" :date "16-Apr-2009 07:30:31.0" :trans-errors '(:WARNINGS 6 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "13" :orbit-number 1 :pcs-time 269 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([Group (10 11 12 13 14 15 16 17 18) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240537233000 234.29999999999998 (Tic-Visit :proposal-id 11979 :visit-id "14" :proposal-version -1 :trans-version "20090130" :date "16-Apr-2009 07:30:36.0" :trans-errors '(:WARNINGS 6 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "14" :obset-id "14" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "14" :orbit-number 1 :pcs-time 269 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([Group (10 11 12 13 14 15 16 17 18) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240531480000 234.5 (Tic-Visit :proposal-id 11979 :visit-id "15" :proposal-version -1 :trans-version "20090130" :date "15-Apr-2009 07:37:19.0" :trans-errors '(:WARNINGS 6 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "15" :obset-id "15" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "15" :orbit-number 1 :pcs-time 269 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([Group (10 11 12 13 14 15 16 17 18) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240537233000 235.10000000000002 (Tic-Visit :proposal-id 11979 :visit-id "16" :proposal-version -1 :trans-version "20090130" :date "15-Apr-2009 07:37:24.0" :trans-errors '(:WARNINGS 6 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "16" :obset-id "16" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "16" :orbit-number 1 :pcs-time 269 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([Group (10 11 12 13 14 15 16 17 18) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240542986000 235.7 (Tic-Visit :proposal-id 11979 :visit-id "17" :proposal-version -1 :trans-version "20090130" :date "15-Apr-2009 07:37:28.0" :trans-errors '(:WARNINGS 6 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "17" :obset-id "17" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "17" :orbit-number 1 :pcs-time 269 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([Group (10 11 12 13 14 15 16 17 18) Within 0.6 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1240548739000 236.30000000000007 (Tic-Visit :proposal-id 11979 :visit-id "18" :proposal-version -1 :trans-version "20090130" :date "15-Apr-2009 07:37:33.0" :trans-errors '(:WARNINGS 6 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 268896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11979 :visit-id "18" :obset-id "18" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11979 :visit-id "18" :orbit-number 1 :pcs-time 269 :si-vis-utilization 2400 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0