HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2311

PERIOD COVERED:  0000Z (UTC) 02/17/99 - 0000Z (UTC) 02/18/99

Daily Status Report as of 049/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed 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 WF/PC-2 8090 (POMS Test Proposal: WF-II Parallel Archive
Proposal Continuation)

       The WF/PC-2 was used in the parallel mode to make some low galactic
latitude archive observations.  The program will be used to take parallel
images of random areas of the sky.  The observations were executed as
scheduled, and no anomalies were noted.

   1.3 Completed 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.

   1.4 Completed WF/PC-2 6588 (High Resolution Imaging of Ionized Gas in
the Disk-Halo Interface of Spiral Galaxies)

       The WF/PC-2 was used to make high resolution imaging of the halo
disk in spiral galaxy NGC-891 in order to study its ionized gas.
Observations of the interstellar medium at the disk-halo interface of
spiral galaxies provide us with very significant information on the
physical state and structure of the interstellar medium in a global sense.
The observations were executed as scheduled, and no anomalies were noted.

   1.5 Completed STIS/MA1 7950 (Cycle 7 MAMA Dark Measurements)

       The Space Telescope Imaging Spectrograph (MA1) was used to make a
dark calibration image.  This is to establish if the detectors are
performing nominally, that no internal movement of the MCP has taken place,
and establish dark level in orbit for a given operating temperature.  These
darks will be used in later image reduction and also trended over
instrument life time as indicators of detector degradation or damage.  The
observations were completed as planned, and no problems were reported.

   1.6 Completed Two Sets of STIS/CCD 8091 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude, non-scripted, parallel observations.  The observations
were completed as planned, and no anomalies were noted.

   1.7 Completed STIS/CCD 7352 (The Nuclear Kinematics of Kinematically
Distinct Cores)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the nuclear region of the kinematically distinct core of
galaxy NGC-4365.  A wave length calibration image was also taken.  The
observations were completed as planned, and no anomalies were reported.

   1.8 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.

   1.9 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 VCC963 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.

   1.10 Completed WF/PC-2 7282 (A Continuing Snapshot Survey for Compact
Stellar Groups and Clusters around Wolf-Rayet Stars)

       The WF/PC-2 was used to make observations of the Wolf-Rayet star
WR112 as part of a continuing snapshot survey of compact stellar groups and
clusters.  The newly imaged clusters allow us to accurately determine the
distances, luminosities, and ages of the WR members.  The observations were
executed as scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 5
                                        Successful : 5

                          Scheduled Reacquisitions : 8
                                        Successful : 8

   2.2 FHST Updates:

                              Scheduled : 15
                             Successful : 15

   2.3 Operations Notes:

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

       Per HSTAR 7005, the recharge ratios for batteries 5 and 6 went
out-of-limits high at 048/155315Z.  The +E SPA was disconnected at
048/1830Z as directed by an operations request.  At approximately
048/2049Z, the recharge ratios went back in bounds.

       At 048/211415Z, the NICMOS FPA temperature sensor on detector 2
disabled when the temperature monitor had a value in excess of 300 degrees
K.  Per an operations note, an existing operations request was executed at
049/0128Z which re-enabled the FPA temperature sensor.

        A TTR was written to document data hits and missing minor frames at
049/072808Z and 049/084155Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH