HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2129

PERIOD COVERED:  0000Z (UTC) 05/21/98 - 0000Z (UTC) 05/22/98

Daily Status Report as of 142/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Three 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.

   1.2 Completed STIS/CCD 7803 (Daily Darks to Update Acquisition Bad Pixel
Table Part III)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
daily dark calibration updates.  These daily darks are intended to identify
hot pixels for update to the acquisition on-board FSW hot pixel table.
Daily hot pixel lists can also be used for science data analysis.  The
observations were completed as planned, and no anomalies were reported.

   1.3 Completed FOC/96 7923 (FOC F/96 Turnon)

       The Faint Object Camera (f/96) was used to take an internal flat and
a dark to ensure that the 30-day limit for the FOC is not exceeded.  The
observations were executed as scheduled, and no anomalies were noted.

   1.4 Completed Two sets of NIC/1/2/3 7855 (The Evolution of Powerful
Radio Galaxies)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the powerful radio galaxies OZ488 and 3C303.1.  Our
proposed NICMOS observations combined with our multi-wavelength observing
program will finally provide us with the data we need to build a picture of
how powerful radio galaxies evolve.  The observations were completed as
planned, and no porblems were reported.

   1.5 Completed STIS/CCD 7926 (CCD Dark and Bias Monitor -- Continued)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
several dark and bias calibration observations.  This is 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.  These observations will also 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.

   1.6 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.

   1.7 Completed FGS 7598 (Long Term Stability of Transfer Scan Mode in FGS-3)

       The Fine Guidance Sensor (FGS-3) was used to make observations of
standard star UPGREN69 in order to study the long term stability of the
Transfer Scan Mode order to study the long term stability of the Transfer
Scan Mode.  The observations were completed as planned, and no problems
were reported.

   1.8 Completed Six Sets of 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.

   1.9 Completed STIS/CCD 7910 (STIS Extragalactic Parallel Survey)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
extragalactic slitless spectrographic observations as part of the parallel
high galactic latitude survey to search for emission line galaxies.  Data
was taken in parallel, and not subject to proprietary time.  The
observations were executed as scheduled, and no anomalies were noted.

    1.10 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 RXJ0921+45.  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.  As described in yesterday's report and in HSTAR 6485, the
acquisition for this proposal defaulted to fine lock on one FGS only.
Otherwise, the observations were executed as scheduled, and no further
anomalies were noted.

   1.11 Completed Five 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.  As described in yesterday's report and in HSTAR 6485, the
acquisition for the first iteration of this proposal defaulted to fine lock
on one FGS only.  Otherwise, the observations were completed as planned,
and no further problems were reported.

   1.12 Completed NIC/1/2/3 7829 (Mapping H_2 Emission around T Tauri Stars)

       The Near Infrared Camera (Cameras One, Two, and Three) was used to
study the distribution of circumstellar dust and molecular {H_2} gas around
the classical T Tauri star CD-34D7151 {cTTS}, probing both the near
circumstellar environment {the accretion disk} as well as the environment
further out where strong winds from these stars may be interacting with
remnants of the cloud material from which they formed.  The primary goal is
to map the distribution of the molecular gas around cTTS.  The proposal
completed nominally.

   1.13 Completed NIC/2 7330 (The Fueling of Active Nucleii: A NICMOS
Snapshot Survey)

       The Near Infrared Camera (Camera Two) was used to probe the dark
matter distribution of NGC-5953 far from the center by observing
intervening absorption from the MgII doublet (lambda 2800) in the spectrum
of one background QSO located in a geometrically optimal position.  HST
observations are required because this feature is in a wavelength range not
accessible from the ground, and the QSO magnitudes and expected strength of
absorption make IUE observations unfeasible.  The proposal completed as
expected with no anomalies.

   1.14 Completed STIS/CCD 7932 (Spectral Purity and slit throughputs for
the First Order Spectroscopic Modes)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of standard star GRW+70D582 in order to study the spectral
purity and slit throughputs for the first order spectroscopic modes.  The
purpose of this proposal is to measure and quantify this effect by
observing strong absorption lines through slits of different sizes.  A wave
length calibration image was also taken.  The observations were completed
as scheduled, and no problems were reported.

   1.15 Completed STIS/CCD 7810 (Sensitivity of Important Secondary
Wavelength Settings)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of standard source BD+75D325 as part of a calibration for
sensitivity of important secondary wavelength settings.  This program is
the basic sensitivity measurement for four secondary wavelength settings
which are heavily used in Cycle 7.  It is run once a year.  The
observations were executed as scheduled, and no anomalies were noted.

   1.16 Completed STIS/CCD 7809 (Prism Sensitivity and Faint Calibration
Standard Extension)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
prism sensitivity and faint calibration standard extension observations
using faint white dwarf star HS2027+065.  This program is the basic
sensitivity measurement for the prism.  It is run once a year.  Sensitivity
measurements are done for the prism at a central wavelength of 1200 using
the 25MAMA and the 2x2 apertures.  Cross-calibration via all first-order L
gratings is done as well.  The observations were completed as planned, and
no problems were noted.

   1.17 Completed NIC/1/2/3 7172 ([Fe-II] AND [Si-VI] Line Imaging of
Seyfert Galaxies)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of Seyfert Galaxy IC4329A to study Fe-II and Si-VI line
imaging.  The two forbidden lines [Fe-II] and [Si-VI] have very different
critical densities and would be expected to originate from very different
regions in a Seyfert galaxy nucleus.  The observations were completed as
planned, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 11
                                        Successful : 11

                          Scheduled Reacquisitions : 9
                                        Successful : 9

   2.2 FHST Updates:

                              Scheduled : 15
                             Successful : 15

   2.3 Operations Notes:

       The SSR correctable EDAC counter was cleared three times using ROP SR-1.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH