HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2148

PERIOD COVERED:  0000Z (UTC) 06/18/98 - 0000Z (UTC) 06/19/98

Daily Status Report as of 170/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 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.

   1.2 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.

   1.3 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 7817 (A Complete NICMOS Map of the
Hubble Deep Field)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations to map the complete WF/PC-2 region of the central Hubble
Deep Field.  These data will provide unique information about the faintest
objects, but will include only a small number of objects with spectroscopic
redshifts or z ~ 3 Lyman break galaxies.  The observations were executed as
scheduled, and no anomalies were noted.

   1.5 Completed Two Sets of WF/PC-2 8013 (WF/PC-2 Parallel Images to the
HDF Flanking Fields {Companion Proposal to 7817})

       The WF/PC-2 was used to make observations parallel to the Hubble
Deep Field observations (i.e., flanking fields).  The complete WF/PC-2
region of the central Hubble Deep Field {HDF} was being mapped with the
NICMOS Camera 3 at F110W and F160W {proposal 7817}.  While these
observations were executing, the WF/PC-2 was working in parallel mode to
image areas near this field.  The observations were completed as scheduled,
and no anomalies were reported.

   1.6 Completed Four Sets of NIC/3 7919 (NICMOS Camera 3 Campaign Snapshots)

       The Near Infrared Camera (Camera Three) was used to make images of
galaxies NGC-2314, NGC-5444, NGC-3415 and NGC-3275 as part of the NICMOS
Camera 3 campaign snapshots.  The proposal is to obtain wide field snapshot
images of nearby galaxies in Paschen Alpha which is inaccessible from the
ground.  The observations were executed as planned, and no anomalies were
reported.

   1.7 Completed NIC/3 7959 (NICMOS GRISM Absolute Sensitivity and
Wavelength Calibration)

       The Near Infrared Camera (Camera Three) was used to make
observations of standard source HB12 in order to make an absolute
sensitivity and wavelength calibration.  This is to make measurements of
the absolute sensitivity the three NICMOS grisms with one solar analog
standard.  The wavelength dispersion solution for the two NICMOS grisms
will be used in the HDF observations, and to supply of calibration for
spectroscopic observations during NIC/3 Campaign.  The observations were
completed as planned, and no anomalies were noted.

   1.9 Completed NIC/1/2/3 7822 (Grism Spectra of Centaurs and TNOs from
1-2 Microns)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make grism spectra of objects 1996RR20 and 1993HA2 from 1-2 microns.  The
surfaces of Centaurs and Trans-Neptunian Objects (TNOs) contain potentially
unique records of early evolutionary processing {accretional and dynamical}
in the outer solar system.  The observations were executed as scheduled,
and no anomalies were noted.

   1.9 Completed NIC/3 7830 (IR Spectra for Known-Mass M Dwarfs)

       The Near Infrared Camera (Camera Three) was used to make infrared
spectrographic observations of the M-Class dwarf stars GJ2005ABC and
BRI0337-35.  Over the last decade there has been considerable debate on two
major issues in the low-mass star literature: {1} the effective temperature
scale for M dwarfs and its relation to mass and luminosity and {2} the
conversion from an absolute magnitude in some passband to a bolometric
magnitude.  The observations were executed as scheduled, and no anomalies
were noted.

   1.10 Completed Two Sets of STIS/CCD 7908 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
calibration observations as part of the POMS Test Proposal.  This was a
STIS non-scripted parallel proposal.  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 : 6
                                        Successful : 6

   2.2 FHST Updates:

                              Scheduled : 20
                             Successful : 20

   2.3 Operations Notes:

       The SST EDAC error counter was cleared three times using ROP SR-1.

       ESTR-3 was reconditioned at 170/0930Z as directed by ROP RD-7.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of the NICMOS Camera Three Campaign, normal science
observations and calibrations.

/DMH