HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2170

PERIOD COVERED:  0000Z (UTC) 07/21/98 - 0000Z (UTC) 07/22/98

Daily Status Report as of 203/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed STIS/CCD 8064 (POMS Test Proposal: STIS Non-Scripted
Parallel Proposal - Backup)

       The Space Telescope Imaging Spectrograph (CCD) was used to conduct a
non-scripted parallel POMS test.  The observations were completed as
scheduled, and no problems 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 NIC/2 7887 (A Survey of Gravitational Lenses as
Cosmological Tools II)

       The Near Infrared Camera (Camera Two) was used to make observations
of the gravitational lens candidate system HST16302+8.  The propose is to
extend our IR survey of gravitational lenses and gravitational lens
candidates by obtaining NICMOS images of 14 additional lens systems or
candidates.  The observations were executed as scheduled, and no anomalies
were noted.

   1.4 Completed Two 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.

   1.5 Completed Three Sets of 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.

   1.6 Completed Two Sets of WF/PC-2 7712 (WF/PC-2 Cycle 7 Supplemental
Darks pt2/3)

       The WF/PC-2 was used to make a series of Cycle 7 supplemental
calibration darks.  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 executed as scheduled, and no
anomalies were noted.

   1.7 Completed STIS/CCD/WF/PC-2/NIC/1/2/3 7567 (Supplement to the STIS
Dynamics IKP)

       The Space Telescope Imaging Spectrograph (CCD), the WF/PC-2 and the
Near Infrared Camera (Cameras One, Two and Three) were used to make
observations of normal galaxy M-87.  Detection of supermassive black holes
in normal galaxies is one of the grand challenges that HST was designed to
meet.  A wavelength and CCD flat calibration images were also taken.  The
observations were executed as scheduled, and no anomalies were noted.

   1.8 Completed 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 star HD173739.  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.

   1.9 Completed STIS/MA2 7604 (Cycle 7 MAMA Dark Measurements)

       The Space Telescope Imaging Spectrograph (MA2) was used to make MAMA
dark measurements.  These darks will be used in later image reductions and
also trended over the instrument's life time as an indicator of the
detector's degradation or damage.  The observations were completed as
scheduled, and no problems were reported.

   1.10 Completed NIC/2/STIS/CCD/WF/PC-2 7220 (Imaging of Quasar Host Galaxies)

       The Near Infrared Camera (Camera Two), the Space Telescope Imaging
Spectrograph (CCD), and the WF/PC-2 were used to make direct imaging
observations of the host galaxy for the broad absorption line quasar
PG1718+480.  The observations were completed as planned, and no anomalies
were reported.

   1.11 Completed NIC/2 7895 (HST NICMOS SNAPSHOT Observations of Field
Galaxies at Z < 1)

       The Near Infrared Camera (Camera Two) was used to make observations
of the field galaxy Gal-141748.  The proposed NICMOS observation will
provide their morphology in rest frame NIR wavelengths {8000 - 16000 A},
where the effect of dust extinction is less severe, and their near infrared
{NIR} colors.  The observations were completed as scheduled, and no
anomalies were reported.

   1.12 Completed NIC/1/2/3 7883 (Infrared Imaging of High Redshift {0.4 <=
z <= 1} Tully-Fisher Galaxies)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the high redshifted Tully-
Fisher class galaxy MDS-0305-0.  With the advent of 10 meter class
telescopes combined with the high spatial resolution of the HST, it is now
possible to study the internal kinematics and structural properties of
galaxies out to a redshift of z~1.  The observations were completed as
planned, and no anomalies were reported.

   1.13 Completed WF/PC-2 7501 (Expansion Parallax Distances to Planetary
Nebulae)

       The WF/PC-2 was used to make parallax distance measurements of the
planetary nebula NGC-7354.  The largest impediment to our understanding of
planetary nebulae is the lack of reliable distances.  Acquired by
generalized statistical methods in all but a handful of cases, individual
PNe distances are often uncertain by factors of two or more.  The
observations were executed as scheduled, and no anomalies were noted.

   1.14 Completed NIC/2/3 7907 (NICMOS Pure Parallel Winter 97-98)

       The Near Infrared Camera (Cameras Two and Three) was used to make
pure parallel spectrographic observations of sky regions when another
instrument is prime.  The observations were completed as planned, and no
anomalies were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 8
                                        Successful : 8

                          Scheduled Reacquisitions : 8
                                        Successful : 8

   2.2 FHST Updates:

                              Scheduled : 13
                             Successful : 13

   2.3 Operations Notes:

       Using ROP SR-1, the SSR EDAC error counter was reset five times.

       The SI C&DH error counter was reset at 202/2130Z per ROP NS-5.

       The ground system was configured at 202/1927Z to use PRS2 as the
prime string.  This occurred so that the PRS1/NAS1 port problem recently
reported could be investigated.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH