typo fix
-668637895
Assigned ID: 251
----- Attempting Submission 1 (Thu Apr 06 17:07:39 GMT 2017) -----
HST Phase I Proposal 251 (TrojanBinary_170406.apt) successfully submitted.
Receipt: # 251-1
----- Attempting Submission 2 (Fri Apr 07 14:10:47 GMT 2017) -----
HST Phase I Proposal 251 (TrojanBinary_170406.apt) successfully submitted.
Receipt: # 251-2
----- Attempting Submission 3 (Fri Apr 07 19:06:14 GMT 2017) -----
HST Phase I Proposal 251 (TrojanBinary_final.apt) successfully submitted.
Receipt: # 251-3
----- Attempting Submission 4 (Fri Apr 07 22:21:41 GMT 2017) -----
HST Phase I Proposal 251 (TrojanBinary_final.apt) successfully submitted.
Receipt: # 251-4
----- Attempting Submission 5 (Fri Apr 07 22:36:12 GMT 2017) -----
unable to reach STScI server to run Visit Planner
tweaked exposure times
-2080608747
----- Attempting Submission 1 (Tue Jul 18 02:36:56 GMT 2017) -----
HST Phase II Proposal 15142 (15142_17Jul17.apt) successfully submitted.
Receipt: # 15142-1
----- Attempting Submission 2 (Tue Jul 18 02:55:01 GMT 2017) -----
there is a problem with the server/visit planner... tried and failed...
Orbit of a Resolved Trojan Binary
We have identified the Jupiter Trojan (16974) 1998 WR21 as a binary, making it only the third known resolvable binary in this population. We will use HST to determine its orbit from which we will determine the system mass. Using the mass and WISE-derived albedo, we will derive the density. Density can be used to constrain planetary migration models; low density is characteristic of bodies found in the Kuiper Belt, a remnant of the solar system's protoplanetary disk. Only one undisputed density has been measured in the Trojans, that of the binary (617) Patroclus, which has a low density of 800 kg/m3. The density of WR21 will test whether Patroclus is an anomaly or whether low densities might be the norm, as they are in the Kuiper Belt.
Five single orbit visits to 1998 WR21 spaced at the presumed synchronous orbital period. Timings spaced at 1/5 fractional orbit phase. Integer full phase(s) can occur between visits.
Solar System
6
false
false
false
false
false
false
SUPPORTED
SOLAR SYSTEM
ASTEROID
Trojan Asteroid (16974) 1998 WR21
TYPE=ASTEROID,A=5.203807061689808,E=0.06936961003515499,I=15.01910777363845,O=241.5969712074684,W=136.4884726334601,M=72.59450393874381,EQUINOX=J2000,EPOCH=27-JAN-2012:00:00:00,EpochTimeScale=TDB
RANGE EARTH TROJAN16974 LT 4.50
EARTH
WFC3/UVIS
Imaging
No
No
F336W
WFC3/UVIS
Imaging
No
No
F438W
WFC3/UVIS
Imaging
No
No
F555W
WFC3/UVIS
Imaging
No
No
F814W
WFC3/UVIS
Imaging
No
No
F336W
WFC3/UVIS
Imaging
No
No
F438W
WFC3/UVIS
Imaging
No
No
F555W
WFC3/UVIS
Imaging
No
No
F814W
WFC3/UVIS
Imaging
No
No
F336W
WFC3/UVIS
Imaging
No
No
F438W
WFC3/UVIS
Imaging
No
No
F555W
WFC3/UVIS
Imaging
No
No
F814W
WFC3/UVIS
Imaging
No
No
F336W
WFC3/UVIS
Imaging
No
No
F438W
WFC3/UVIS
Imaging
No
No
F555W
WFC3/UVIS
Imaging
No
No
F814W
WFC3/UVIS
Imaging
No
No
F336W
WFC3/UVIS
Imaging
No
No
F438W
WFC3/UVIS
Imaging
No
No
F555W
WFC3/UVIS
Imaging
No
No
F814W
POS-TARG
DITHER
0.173
LINE
0.112
false
false
81.785
4
23.884
WFC3-UVIS-DITHER-BOX
1
false
POS-TARG
DITHER
0.145
LINE
false
false
2
46.84
WFC3-UVIS-DITHER-LINE
2
false
First visit can schedule at any time, t_1, in the range window (better early in the window for flexibility).
Subsequent visits should schedule at a time defined by:
t_n = t_1 + (n+f)*78.9 hr
where n is an integer from 0 to 10 (upper limit to avoid accumulating period uncertainty error)
and f is a fraction that is different for each visit in the following sequence
visit f err
1 0 n/a
2 0.2 +/-0.05
3 0.4 +/-0.05
4 0.6 +/-0.05
5 0.8 +/-0.05
(Tic-Visit
:proposal-id 15142
:visit-id "01"
:proposal-version -1
:trans-version "20170613"
:date "17-Jul-2017 22:50:01.0"
: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 61168
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15142
:visit-id "01"
:obset-id "01"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15142
:visit-id "01"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2736
:al-overhead-at-end 0
:internal-dur-at-end 103
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
false
1
0
this visit should follow visit 1 by
(n + 0.2 +/-0.05) * 78.9 hrs
where n is an integer </= 10
(Tic-Visit
:proposal-id 15142
:visit-id "02"
:proposal-version -1
:trans-version "20170613"
:date "17-Jul-2017 22:53:56.0"
: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 61168
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15142
:visit-id "02"
:obset-id "02"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15142
:visit-id "02"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2736
:al-overhead-at-end 0
:internal-dur-at-end 103
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
false
1
0
this visit should follow visit 1 by
(n + 0.4 +/-0.05) * 78.9 hrs
where n is an integer </= 10
(Tic-Visit
:proposal-id 15142
:visit-id "03"
:proposal-version -1
:trans-version "20170613"
:date "17-Jul-2017 22:53:58.0"
: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 61168
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15142
:visit-id "03"
:obset-id "03"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15142
:visit-id "03"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2736
:al-overhead-at-end 0
:internal-dur-at-end 103
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
false
1
0
this visit should follow visit 1 by
(n + 0.6 +/-0.05) * 78.9 hrs
where n is an integer </= 10
(Tic-Visit
:proposal-id 15142
:visit-id "04"
:proposal-version -1
:trans-version "20170613"
:date "17-Jul-2017 22:54:01.0"
: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 61168
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15142
:visit-id "04"
:obset-id "04"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15142
:visit-id "04"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2736
:al-overhead-at-end 0
:internal-dur-at-end 103
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
false
1
0
this visit should follow visit 1 by
(n + 0.8 +/-0.05) * 78.9 hrs
where n is an integer </= 10
(Tic-Visit
:proposal-id 15142
:visit-id "05"
:proposal-version -1
:trans-version "20170613"
:date "17-Jul-2017 22:54:03.0"
: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 61168
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15142
:visit-id "05"
:obset-id "05"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15142
:visit-id "05"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2736
:al-overhead-at-end 0
:internal-dur-at-end 103
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
false
1
0