HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2273

PERIOD COVERED:  0000Z (UTC) 12/17/98 - 0000Z (UTC) 12/18/98

Daily Status Report as of 352/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed WF/PC-2 7377 (Dwarf Elliptical Galaxy Snapshot Survey II)

       The WF/PC-2 was used to make observations of the dwarf elliptical
galaxy VCC1413 as part of Snapshot Survey II.  This survey will provide
important information on the globular cluster systems of such galaxies and
the properties of their cores and nuclei.  The observations were completed
as planned, and no anomalies were reported.

   1.2 Completed Two 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 Four Sets of NIC/1/2/3 8083 (FLATs: Warming Up - continuation)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
monitor the flat fields 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 executed as scheduled, and no
anomalies were noted.

   1.4 Completed Two 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.

   1.5 Completed Eleven 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.

   1.6 Completed FGS 7492 (The Distances to Dwarf Novae, and the
Calibration of the Technique of Infrared Spectroscopic Parallax)

       The Fine Guidance Sensors were used to make astrometric observations
of the dwarf nova SS-Cyg and several other reference stars.  The distances
to dwarf novae are poorly known.  The distance to the object can be
measured using a technique of infrared spectroscopic parallax.  The
observations were completed as scheduled, and no anomalies were noted.

   1.7 Completed WF/PC-2 7622 (WF/PC-2 Cycle 7 Internal Monitor)

       The WF/PC-2 was used to make a set of Cycle 7 internal monitoring
calibration measurements.  A variety of internal exposures are obtained in
order to provide a monitor of the integrity of the CCD camera electronics
in both bays {gain 7 and gain 15}, a test for quantum efficiency in the
CCDs, and a monitor for possible buildup of contaminants on the CCD
windows.  A bias calibration and an internal flat calibration image were
also taken.  The observations were executed as scheduled, and no anomalies
were noted.

   1.8 Completed Six Sets of STIS/CCD 8062 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations taken in parallel with the prime science
observations.  The observations were completed as planned, and no problems
were reported.

   1.9 Completed Two Sets of NIC/2 7828 (Detection of the Infrared Jet in
the R-Aquarii Binary System)

       The Near Infrared Camera (Camera Two) was used to make observations
of the variable binary star R-Aqrarii to detect its infrared jet.  The
nearby {~200 pc} R-Aqrarii symbiotic system is a well-known prototype for
non-relativistic astrophysical jets.  The observations were executed as
scheduled, and no anomalies were noted.

   1.10 Completed WF/PC-2 6751 (Is the Central Star of K 648 in M15 a Close
Binary?)

       The WF/PC-2 was used to make observations of the central star of the
planetary nebula K648 which is located in globular cluster M-15 to
determine if this star is a binary star.  Pre-repair HST images reveal that
the nebula is strongly elliptical in shape, and shows blobs on either side
of the central star.  The observations were executed as scheduled, and no
anomalies were noted.

   1.11 Completed Two Sets of STIS/CCD 8084 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation)

       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.

   1.12 Completed Three Sets of WF/PC-2 6967 (Blue Continuum Snapshots of
3CR Radio - Continued Galaxies)

       The WF/PC-2 was used to make observations of the radio galaxies
3C326.1, 3C119.0 and 3C137.0.  Radio galaxies are an important class of
extragalactic objects: they represent one of the most energetic
astrophysical phenomena; they may be used as probes of their environments;
and they are unique probes of the early Universe.  The observations were
completed as planned, and no problems were reported.

   1.13 Completed STIS/CCD/MA1 8067 (Improved STIS Sensitivity Measurement
for E140H)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make observations of G191B2B.  This program is an improved sensitivity
measurement for the E140H grating.  A wavelength calibration observations
was also completed.  The observations were executed as scheduled, and no
anomalies were noted.

   1.14 Completed Two 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.

   1.15 Completed Three 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.

   1.16 Completed 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.

   1.17 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.

   1.18 Completed WF/PC-2 7274 (Secular Changes in the Jet of M-87)

       The WF/PC-2 was used to make observations of the secular changes in
the jet coming off of the active galactic nuclei of galaxy M-87.  Past
observations with the FOC have shown changes as small as 0.03", and provide
a unique opportunity to study proper motions and structural changes of the
jet.  An internal flat calibration image was also taken.  The observations
were completed as scheduled, and no anomalies were reported.

   1.19 Completed WF/PC-2 6587 (Black Holes and Cores of Early-Type Galaxies)

       The WF/PC-2 was used to make observations of early-type galaxy
IC3370 in order to study its nuclear core region and its possible black
hole.  The campaign to find black holes in the centers of galaxies using
HST has so far been highly successful.  The observations were completed as
planned, and no problems were reported.

   1.20 Completed STIS/CCD 8066 (IR Standards: HZ43 Repeat)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
infrared observations of HZ43.  Only a few calibrations measurements exist,
more data are needed, especially in G230LB, which has no data at all.  A
wavelength calibration image was also taken.  The observations were
completed as planned, and no anomalies were reported.

2.0 FLIGHT OPERATIONS SUMMARY

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 13
                                        Successful : 13

                          Scheduled Reacquisitions : 4
                                        Successful : 4

   2.2 FHST Updates:

                              Scheduled : 31
                             Successful : 30

       The FHST update at 352/0633Z failed.

   2.3 Operations Notes:

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

       FHST performance data was collected twice per an open operations
request.

       As documented in HSTAR 6819, an incorrect return link frequency was
automatically scheduled for an SSR DG1 TDRSS support.  This resulted in a
18-minute, 1-second loss of recoverable engineering data.

       The PACOR-II facility reported, via a TTR, three PSN jumps at 352/0234Z.

       At 352/045622Z, a STIS MCE-2 reset occurred outside a SAA contour
while the low voltage was on.  HSTAR 6820 was written.  ROP NS-2 was
executed at 352/0513Z to clear the STIS flight software error counter.
Recovery was accomplished via SMS commanding at 352/051338Z, the time of
MAMA-2 high voltage on commanding.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH