HUBBLE SPACE TELESCOPE -
Continuing to collect World Class Science
DAILY REPORT
#4717
PERIOD COVERED: 5am October 15 -
5am October 16, 2008 (DOY 289/0900z-290/0900z)
OBSERVATIONS
SCHEDULED
FGS 11212
Filling the Period
Gap for Massive Binaries
The current census of binaries
among the massive O-type stars is
seriously incomplete for systems
in the period range from years to
millennia because the radial
velocity variations are too small and the
angular separations too close for
easy detection. Here we propose to
discover binaries in this
observational gap through a Faint Guidance
Sensor SNAP survey of relatively
bright targets listed in the Galactic O
Star Catalog. Our primary goal is
to determine the binary frequency
among those in the
cluster/association, field, and runaway groups. The
results will help us assess the
role of binaries in massive star
formation and in the processes
that lead to the ejection of massive
stars from their natal clusters.
The program will also lead to the
identification of new, close
binaries that will be targets of long term
spectroscopic and high angular
resolution observations to determine
their masses and distances. The
results will also be important for the
interpretation of the spectra of
suspected and newly identified binary
and multiple systems.
FLIGHT OPERATIONS SUMMARY:
Significant Spacecraft Anomalies:
(The following are preliminary reports
of potential non-nominal
performance that will be investigated.)
HSTARS:
(None)
COMPLETED OPS
REQUEST:
18311-2 - Power cycle CU/SDF A @
289/1102z
18312-0 - Avoid unnecessary FGS FW
moves due to default FGE refresh @ 289/1825z
18310-0 - PRT Slew for Post-B-Side
Recovery @ 289/1849z
18319-0 - Gyro Bias Update -
B-side Switch Step 123 @ 289/1922z
18320-4 - Gyro Bias Estimation
OBADs and H&S Intercept @ 289/2118z
18323-0 - Restore NSSC-1/HST486 HV
Protection Capability @ 290/0041z
18321-0 - Reinstall Battery VTFE
Curves following B-Side Switch @ 290/0058z
18326-0 - Safe and Recover
WF/PC-II @ 290/0350z
18325-0 - Omit WFPC2 Dump (Steps
163 & 164) @ 290/0500z
18313-1 - DMU B-Side Switch @
290/0514z
SCHEDULED
SUCCESSFUL
FGS
GSacq
05
05
FGS
REacq
00
00
OBAD with Maneuver
12
12
COMPLETED OPS
NOTES:
1737-0 - LIM OFF for DDIU2AVM @
289/1246z
1738-0 - PDU2 Current Limit
Modification @ 289/1732z
1739-0 - Update CCC V/T Level
Yellow and Red Ground Limits @ 289/1740z
1741-0 - Manage ACS WFC Detector
Housing Temperature Limit @ 290/0035z
1642-4 - Consolidated PCS Limits @
290/0149z
SIGNIFICANT EVENTS:
Flash
Report:
CU/SDF A power cycle confirmed
that SDF A is not operable.
Gyro 4 powered up nominally at
289/11:13.
HST was commanded into Hardware
Sun-Point safe mode at 8:20 a.m. EDT.
The required transitions to the
B-sides of some of the Data Management
System's modules proceeded
smoothly, and telemetry was reacquired ahead
of schedule. The HST486
(spacecraft computer) was reloaded and its
performance verified. At 1:10
p.m., HST was commanded out of safe mode.
It is again being controlled by
the HST486.
All DMS B-Side hardware continues
to perform nominally.
NICMOS and ACS commanding
proceeded nominally and the EEPROM dumps were
verified by Payload FSW.
All SIs were safed at 05:10 UTC in
preparation for activation of the
Science SMS at 290/16:00 UTC.
DMS/SI C&DH functions have successfully
transitioned to the
B-Side and HST is ready for science!