HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2418

PERIOD COVERED:  0000Z (UTC) 07/20/99 - 0000Z (UTC) 07/21/99

Daily Status Report as of 202/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Two Sets of WF/PC-2 8443 (WF/PC-2 Cycle-8 Supplemental Darks
pt1/3)

       The WF/PC-2 was used to obtain 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 problems were reported.  

   1.2 Completed Two Sets of WF/PC-2 8436 (POMS Test Proposal: WFII Backup
Parallel Archive Proposal II)

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

   1.3 Completed Two Sets of 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 with no
anomalies.  

   1.4 Completed STIS/CCD 7350 (Testing the Supermassive Black Hole Paradigm in
Nearby Radio-Quiet AGNs)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the radio-quiet active galactic nuclei NGC-4278.  Obtaining a
large sample of central engine mass determinations is a crucial first step
toward understanding the physics of AGN central engines, including the puzzling
difference between radio-loud and radio-quiet AGNs.  A wavelength calibration
observation was also taken.  The observations were completed as planned with no
anomalies.  

   1.5 Completed Three Sets of STIS/CCD 8408 (STIS CCD Dark Monitor C8)

       The Space Telescope Imaging Spectrograph (CCD) was used to make a CCD
bias calibration observation. This is to monitor the darks for the STIS CCD. 
The observations were executed as scheduled, and no anomalies were reported.  

   1.6 Completed Two Sets of WF/PC-2 8538 (Hubble Heritage Observations of
Hickson Compact Galaxy Group 87)

       The WF/PC-2 was used to make Hubble Heritage observations of the Hubble
Compact Group #87.  The sequence of star formation mapped spatially throughout
this group may be the best opportunity to sequence the interplay between
interactions and the different levels of star formation, acting from the tidal
debris in through the central engines of these galaxies.  The observations were
completed as planned, and no anomalies were reported.  

   1.7 Completed Three Sets of STIS/CCD 8406 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation V)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations taken in parallel with the prime science
observations as part of a POMS proposal.  This is a STIS non-scripted parallel
Condition V proposal.  The observations were completed as scheduled with no
anomalies.  

   1.8 Completed STIS/CCD 8409 (STIS CCD Bias Monitor C8)

       The Space Telescope Imaging Spectrograph (CCD) was used to make a CCD
bias calibration observation.  This is to monitor the bias in the 1x1, 1x2,
2x1, and 2x2 bin settings at gain=1, and 1x1 at gain = 4, to build up high-S/N
superbiases and to track the evolution of hot columns.  The observations were
executed as scheduled, and no anomalies were reported.  

   1.9 Completed STIS/CCD/MA2 7394 (Mass Loss in Globular Cluster Giants: NGC
6752)

       The Space Telescope Imaging Spectrograph (CCD/MA2) was used to make
observations of the giant globular cluster NGC-6752 to study its mass loss. 
Uncertainty in the amount of mass lost by a low-mass, old, metal-poor stars as
it evolves up the giant branch for the first time is one of the most
significant impediments to the interpretation of globular-cluster
color-magnitude diagrams.  A wavelength calibration image was also taken.  The
observations were executed as scheduled, and no anomalies were noted.  

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 4
                                        Successful : 4

                          Scheduled Reacquisitions : 6
                                        Successful : 6

   2.2 FHST Updates: 

                              Scheduled : 10
                             Successful : 10

   2.3 Operations Notes: 

       The SSR EDAC error counter was cleared three times per ROP SR-1.

       HSTAR 7199 describes a STIS EMC re-try which occurred at 202/075426Z. 
ROP NS-12 was executed at 202/0807Z to clear the STIS flight software error.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

       Continuation of normal science observations and calibrations.

/DMH