HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2241

PERIOD COVERED:  0000Z (UTC) 10/30/98 - 0000Z (UTC) 11/02/98

Daily Status Report as of 306/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Thirteen Sets of WF/PC-2 7713 (WF/P-2 Cycle 7 Supplemental
Darks pt3/3)

       The WF/PC-2 was used to make supplemental dark calibration images.
This dark calibration program obtains three dark frames every day to
provide data for monitoring and characterizing the evolution of hot pixels.
The observations were completed as planned, and no anomalies were noted.

1.2 Completed Five Sets of STIS/CCD 7948 (CCD Dark and Bias Monitor --
Cont. to Dec. 98)

       The Space Telescope Imaging Spectrograph (CCD) was used to measure
CCD dark current and bias rates for the two supported amplifier settings
{GAIN=1 and GAIN=4} in order to gather data for making superdarks and
superbiases.  The data will be used to track the growth of hot pixels on
the CCD in general and within the various target acquisition apertures
specifically.  The observations were executed as scheduled, and no
anomalies were noted.

1.3 Completed Twenty-Two Sets of NIC/1/2/3 7963 (Darks: Warming Up)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
monitor the detector dark current during the interval between the end of
science observations and the exhaustion of cryogen and subsequent warming
of the dewar to > 100K.  The observations were completed as planned, and no
anomalies were noted.

1.4 Completed Two Sets of NIC/2 7894 (Completing A Near-Infrared Search for
Very Low Mass Companions to Stars within 10 pc)

       The Near Infrared Camera (Camera Two) was used to make observations
searching for very low mass (VLM) companions to the stars CD-44D3045 and
LHS271.  This search will be the largest, most sensitive, volume-limited
search for VLM companions ever undertaken.  The observations were completed
as planned, and no anomalies were reported.

1.5 Completed FOC/96 7685 (FOC F/96 UV Throughput Monitoring)

       The Faint Object Camera (f/96) was used to make observations of
standard star BPM16274 in order to perform ultraviolet throughput
monitoring.  These observations are taken four time during the cycle.  An
internal calibration flat image was also taken.  The observations were
completed as scheduled, and no problems were reported.

1.6 Completed Thirteen Sets of STIS/CCD 8084 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation II)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
non-scripted parallel high galactic latitude observations as part of POMS
test proposal.  The observations were executed as scheduled, and no
anomalies were noted.

1.7 Completed Six Sets of WF/PC-2 7909 (POMS Test Proposal: WF II Parallel
Archive Proposal)

       The WF/PC-2 was used to make parallel observations as part of the
POMS test proposal.  This test proposal is designed to simulate scientific
plans.  The observations were completed as planned, and no problems were
reported.

1.8 Completed Five Sets of NIC/2/3 8082 (NICMOS Pure Parallel Fall 98)

       The Near Infrared Camera (Cameras Two and Three) was used to make
pure parallel observations while another instrument is prime.  The
observations were executed as scheduled, and no anomalies were noted.

1.9 Completed STIS/CCD/MA1/MA2 7939 (Determination of OI Emissions from
Ganymede)

       The Space Telescope Imaging Spectrograph (CCD/MA1/MA2) was used to
spectroscopically image the OI emissions from Ganymede.  The Galileo
mission has shown that Ganymede possesses an internal magnetic field,
producing a local magnetosphere within the magnetosphere of Jupiter.  It is
highly desirable that these observations be obtained in calendar 1998 in
order to best support the extended Galileo mission.  The observations
completed as scheduled with no reported problems.

1.10 Completed Two Sets of NIC/2 7227 (A Search for Low Mass/Sub-Luminous
Companions to M-Stars)

       The Near Infrared Camera (Camera Two) was used to make a search for
low mass/sub-luminous companions to low mass M class stars.  Knowledge of
stellar and sub-stellar masses and luminosities at and below the ~0.08
M{sun} H-burning limit is of fundamental importance.  A dark calibration
image was also taken.  The observations were completed as planned, and no
problems were reported.

1.11 Completed Five Sets of NIC/2 7226 (Search for Massive Jupiters)

       The Near Infrared Camera (Camera Two) was used to make a corographic
search for massive planets around nearby, young main sequence stars.
Because of the extreme youth of these objects, any low-mass brown dwarf and
planetary companions will still be in a higher luminosity phase and thus
easily detectable.  A dark calibration image was also taken.  The
observations were executed as scheduled, and no anomalies were noted.

1.12 Completed WF/PC-2 6597 (High Resolution Imagery of Bipolar, Rotating,
Episodic Jets)

       The WF/PC-2 was used to search for evidence of the existence of
bipolar, rotating, episodic jets. These jets are characterized by
symmetric, diametrically opposite, collimated flows with observable,
radiative, bow-shocks around their leading edges. It is the spatial
distributions of the resultant knots of ionized gas which indicate
rotations of the bi-polar, episodic jets.  The observations were completed
as planned, and no anomalies were reported.

1.13 Completed Two Sets of NIC/2 7233 (Dust Disks Around Main Sequence Stars)

       The Near Infrared Camera (Camera Two) was used to make observations
of the dust disk around main sequence stars.  The observations were made
with the coronagraph to minimize the effects of glare from the bright
central star.  A dark calibration image was also taken.  The observations
were completed as scheduled, and no anomalies were reported.

1.14 Completed STIS/CCD 7361 (The Nature of Nuclear Activity in Nearby
Galaxies)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the nuclear region of galaxy N3368.  The high resolution
spectra will be used to search for broad components in H-Alpha and for
velocity gradients, indicative of gas rotation or other ordered motions.
The observations were executed as scheduled, and no anomalies were noted.

1.15 Completed WF/PC-2 7277 (Calibration of the Cepheid P-L Relation with
Observations of the Maser-Host Galaxy NGC)

       The WF/PC-2 was used to make observations of the maser-host galaxy
NGC-4258 to study its Cepheid variable stars.  These data will help refine
the calibration of the Cepheid period-luminosity relationship.  The
observations were completed as scheduled, and no problems were reported.

1.16 Completed Two Sets of NIC/2 7897 (Probing Planetary Formation Around
Main-Sequence Stars: A Snapshot Survey)

       The Near Infrared Camera (Camera Two) was used to make snapshort
survey images of the main sequence stars HR241 and HR1686 probing for
planetary formation.  The IR excess main-sequence stars host cool
circumstellar dust disks, which are most likely replenished by the debris
of unseen planetesimals.  The observations were completed as scheduled, and
no problems were noted.

1.17 Completed WF/PC-2 6734 (Revelaing the Stellar Populations of Andromeda IV)

       The WF/PC-2 was used to observe Andromeda IV, an enigmatic object,
first identified in 1972 by proposing deep WFPC2 V and I imaging of And IV
to V>~ 27, which will resolve stars down to M_V ~ +3, and determine main
sequence turnoffs of <~ 5 * 10^9yr.  The observations completed as planned.

1.18 Completed Four Sets of STIS/CCD 7912 (STIS Parallel Archive Proposal -
Nearby Galaxies - Imaging and Spectroscopy)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
parallel observations of nearby galaxies.  This survey will be useful to
study the star formation histories, chemical evolution, and distances to
these galaxies.  These data will be placed immediately into the Hubble Data
Archive.  The observations were completed as with no problems.

1.19 Completed Three Sets of NIC/2/3 8063 (NICMOS Pure Parallel Sponge -
Backup)

       The Near Infrared Camera (Cameras Two and Three) was used to make
observations taken in parallel with the prime science observations.  This
proposal is PRE-the new FOM default.  The observations were executed as
scheduled, and no anomalies were noted.

1.20 Completed STIS/CCD 7333 (STIS Images of 48 Damped Ly-Alpha Galaxies)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the damped Lyman-Alpha galaxy Q0049+2820.  This study will
unify absorption-line studies, and faint galaxy imaging studies, thereby
allowing a detailed treatment of the history of star formation, gas
consumption, chemical enrichment, and assembly in the population of
galaxies.  The observations were completed as planned, and no problems were
reported.

1.21 Completed NIC/2 7890 (The Youngest Stars: Circumstellar Structure,
Binary and Origin of Jets)
4|
       The Near Infrared Camera (Camera Two) was used to make observations
of the young star HH300-VLA which has circumstellar structure, and jets.
The purpose is to obtain broadband 2.2 Mum images of the compact cavities
illuminated by Herbig-Haro (HH) energy sources, and to obtain narrowband
H-2 images to study how the HH jets originate at their sources.  The
observations were completed as planned, and no problems were reported.

1.22 Completed NIC/3 7892 (Narrow-band Imaging of BAL QSOs)

       The Near Infrared Camera (Camera Three) was used to make narrow band
observations of the BL-Lac (BAL) QSO UN253.  The detection of extended
emission-line gas structures in BAL QSOs would offer another means of
investigating the BAL QSO phenomenon as well as establishing a new probe of
material in galaxies at high redshift.  The observations were completed as
planned, and no problems were reported.

1.23 Completed WF/PC-2 7387 (T-Tauri Star Snapshot Survey)

       The WF/PC-2 was used to make observations of the star HP-TAUG2 as
part of a T-Tauri class star survey.  The observations were executed as
scheduled with no anomalies.

1.24 Completed WF/PC-2 6803 (Disk-Resolved Spectrophotometry of the Dark
Side of Iapetus)

       The WF/PC-2 was used to obtain the first spectrum of pure dark
material on Iapetus' Cassini Regio from near UV to near IR {335-1020 nm},
allowing a calibration of higher resolution, earth-based spectra of the
leading side of Iapetus.  The proposal was executed as planned with no
problems.

1.25 Completed STIS/CCD/MA1/MA2 7269 (The 1997/98 Eclipse of VV Cephei)

       The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was used
to make ultraviolet spectrographic observations of the long-period
eclipsing binary star HD208816 (a.k.a., VV-Cephei).  This eclipse will
provide an unprecedented opportunity to obtain spatially resolved
information about the density, ionization and velocity structure in the
outer atmosphere of the M supergiant primary.  A wave length calibration
observation was also taken.  The observations were completed as scheduled,
and no anomalies were noted.

1.26 Completed WF/PC-2 8061 (POMS Test Proposal: WF-II Backup Parallel
Archive Proposal)

       This is a POMS test proposal designed to simulate scientific plans.
The proposal was executed as planned, and no anomalies were reported.

1.27 Completed WF/PC-2 6677 (The Origin of the X-Ray Background: What are
the Faintest X-Ray Galaxies?)

       The WF/PC-2 was used to make observations of the galaxy GAL-133525
which is from the deepest optically identified (ROSAT) X-ray survey yet.
These images were taken to  determine the morphologies of the remaining
systems which we cannot study from the ground to determine whether the
remaining non-QSO XRB might be explained by emission from interacting or
disturbed spirals.  The observations were completed as planned, and no
anomalies were reported.

2.0 FLIGHT OPERATIONS SUMMARY

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 34
                                        Successful : 34
                          Scheduled Reacquisitions : 15
                                        Successful : 15

   2.2 FHST Updates:

                              Scheduled : 58
                             Successful : 58

   2.3 Operations Notes:

       Using ROP SR-1, the SSR EDAC error counter was cleared eight times.

       PDB 53.C was made prime at 304/1720Z.  No problems were encountered
either before (when it operated in the sshadow mode, or after the
transition.

       As documented in HSTAR 6748, the STIS MCE-1 reset at 303/171503Z
while the vehicle was outside the SAA and while the low voltage was on.
ROP NS-12 was executed to reset the STIS error counter.  The MAMA-1 was
recovered successfully via the SMS at the time of the next high voltage on
commanding, or 305/073634Z.

       A NICMOS single bit error occurred at 305/062456Z.  HSTAR 6750 was
written.  Per an operations request, the NICMOS internal log was dumped and
the ground system limit was raised by one count at 305/0740Z.


       As documented in HSTAR 6751, the STIS MCE-2 reset at 305/162932Z
while the vehicle was in an SAA interval and while the low voltage was on.
ROP NS-12 was executed to reset the STIS error counter.  The MAMA-2 was
recovered successfully via the SMS at the time of the next high voltage on
commanding.

       HSTAR 6754 describes a large roll error of 56.6 arc-sec that
occurred at 306/062148Z during dual FGS guidance.  A proposal to be
described in the next report, NICMOS 7635, may have been affected.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH