HUBBLE SPACE TELESCOPE

                              DAILY REPORT #1400

PERIOD COVERED:  0000Z (UTC) 05/26/95 - 0000Z (UTC) 05/30/95

Daily Status Report as of 150/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Two Sets of FOS/BL 6146 (FOS Location of Spectra and Aperture -
Part 2)

     The Faint Object Spectrograph (Blue Side) was used to conduct a test to
determine the repeatability of positioning the filter-grating wheel. All
observations were internal. A wave length calibration image was also taken.
All observations were executed as scheduled, and no anomalies were noted.

1.2 Completed WF/PC-2 5981 (Calibration of Nearby Type IA Supernova as
Standard Candles: NGC-4639)

       The WF/PC-2 was used to make observations of Cepheid variable stars in
Galaxy NGC-4639 (which has produced a Type IA Supernova) to calibrate the
nova's absolute brightness so that it can be used as a standard candle for
distance measurements.The observations were executed as scheduled, and no
anomalies were noted.

1.3 Completed WF/PC-2 6142 (WF/PC-2 Cycle 4 Calibration: Earth Flats, Smaller
Set Part II)

       The WF/PC-2 was used to make Earth Flat calibration images for the
ultraviolet and narrow-band filters to correct for the telescope's
illumination pattern. The observations were executed as scheduled, and no
anomalies were noted.

1.4 Completed WF/PC-2 5703 (Ultraviolet Evolution of Elliptical Galaxies at
Moderate Redshift)

       The WF/PC-2 was used to make ultraviolet observations of the moderate
redshift elliptical galaxy A1758G7 to determine the nature of the hot stars
within this early-type galaxy. The observations were completed as planned,
and no problems were reported.

1.5 Completed WF/PC-2 5560 (WF/PC-2 Cycle 4 Calibration: Internal Monitor. 1)


       The WF/PC-2 was used to make several internal bias, K-Spot, and flat
calibration observations to monitor the CCD camera electronics, the optical
alignment, and to check for contamination. The observations were completed as
planned, and no anomalies were noted.

1.6 Completed WF/PC-2 5397 (Determination of the Extragalactic Distance
Scale: Cycle 4 High)

       The WF/PC-2 was used to make images of galaxies NGC-224-FIE, and
NGC-4414 to be used in measuring the periods of Cepheid variable stars within
the galaxies. The observations were completed as planned, and no anomalies
were noted.


1.7 Completed FOC/96 5708 (Bulge Populations in S0 Galaxies: Cycle 4
Carry-Over)

       The Faint Object Camera (f/96) was used to make ultraviolet
observations of hot stars in the central bulge of the S0 class galaxy
NGC-5102 to study its stellar populations. The observations were completed as
planned and no anomalies were noted.

1.8 Completed WF/PC-2 6252 (GTO Pure Parallel Program - Cycle 4 Crafting
Test.

       This parallel program uses the WF/PC-2 and target fields at galactic
latitudes above 10 degrees.  Galactic star counts and the structure of the
galactic halo will be studied.  The observation completed as planned, and no
problems were reported.

1.9 Completed FOS/RD 5512 (Cores of Early Type Galaxies: Part II)

       The Faint Object Spectrograph (Red Side) was used to make observations
of the nucleus of early type galaxy NGC-3377-NU.

1.10 Completed Two Sets of WF/PC-2 6251 (Medium Deep Survey - Crafting Test)

       The WF/PC-2 was used in this continuation of the medium deep survey.
The proposal is targeting rare objects (lenses, peculiar galaxies, faint
stars) and sources related to the faint blue galaxy problem.  This
observation was completed with no reported problems.

1.11 Completed WF/PC-2 and FOC/96 5477 (Spectral Index Mapping and Secular
Changes in the Jet of M-87: Cycle 4 High)

       The WF/PC-2 and the Faint Object Camera (f/96) were used to make
observations of the nucleus, jet, and counter-jet in galaxy M-87. The
observations were completed as planned, and no anomalies were reported.

1.12 Completed Two Sets of WF/PC-2  5476 (Continuum Snapshots of 3CR Radio
Galaxies)

       The WF/PC-2 was used to make snapshot images of radio galaxies 3C272.0
and 3C244.1 as part of a continuum survey and to study the galaxies's
morphology. The observations were executed as scheduled, and no anomalies
were noted.

1.13 Completed WF/PC-2 5493 (Synoptic Monitoring of Seasonal Phenomena on
Mars: Cycle 4 Medium)

       The WF/PC-2 was used to make observations of the planet Mars at
selected seasons, looking for periodic changes. The observations were
executed as scheduled, and no anomalies were noted.

1.14 Completed FOS/BL 5492 (Detection of the Intergalactic Medium Using
Gunn-Peterson HEII304A Absorption Line)

       The Faint Object Spectrograph (Blue Side) was used to make
spectrographic observations of Quasi-Stellar Object 133637 to search for
redshifted 304A line (absorption) of He II.  A guide star acquisition failure
occurred at the beginning of this almost 9 hour observation.  However, no
problems have been reported by the science team.

1.15 Completed WF/PC-2 6121 (The X-Ray Binary in NGC6712)

       The WF/PC-2 was used to obtain time-resolved photometry in the 21-mag
optical counterpart of an x-ray source in globulat cluster NGC6712.  The
photometry will define a light curve and provide orbital period of this
presumed binary, and to confirm that the x-ray source is a degenerate star.
The observations were completed as planned, and no problems were reported.

1.16 Completed WF/PC-2 5402 (Multiple Arc Systems in X-Ray Selected Clusters:
Cycle 4 Medium)

       The WF/PC-2 was used to obtain deep exposures of the X-Ray bright
galaxy cluster MS2137.3-2 to look for gravitationally lensed objects that
might be seen in the cluster. The observations completed with no reported
errors.

1.17 Completed Three Sets of WF/PC-2 5562 (WF/PC-2 Cycle 4 Calibration:
Internal Monitor 3: Darks)

       The WF/PC-2 was used to obtain several 30-minute long, dark exposures
to provide ongoing calibration of the CCD dark current and to monitor and
characterize the evolution of hot pixels. The observations were executed as
scheduled, and no anomalies were noted.

1.18 Completed GHRS/1 5275 (HRS Side 1 Threshold Adjustment)

       The Goddard High Resolution Spectrograph (Side 1) was used to set
threshold limits for the noisy channels that will be determined by this
engineering test.  The observations are all internals, flat fields, and
flats.  This observation completed as planned, and no problems were noticed.

1.19 Completed WF/PC-2 5984 (Absorption - Selected Galaxies)

       The WF/PC-2 was used to study the morphology of several galaxies, at
redshifts from 0.4 to 1.0, that are absorbing light from background quasars.
The absorbing galaxies were discovered from ground-based surveys.  The
observation was completed with no reported anomalies.

1.20 Completed WF/PC-2 6229 (Stellar Populations in the LMC and the SMC)

       The WF/PC-2 was used to obtain images of two regions of the LMC, and
one in the SMC.  The objective is to construct color magnitude diagrams for
these regions.  The luminosity function and stellar formation history of the
clouds will then be derived.  The proposal completed uneventfully.

1.21 Completed Two Sets of WF/PC-2 5655 (WF/PC-2 Cycle 4 Calibration:
Internal Monitor. 2: Flats Part 2)

        The WF/PC-2 was used to make both dark and visual flats. The
observations were completed as planned, and no problems were reported.

1.22 Completed WF/PC-2 6124 (Iron Rich SN Elements in NGC5253)

       The WF/PC-2 was used to obtain UV images of the central region of
galaxy NGC5253 to locate the ejecta of supernova remnants.  The technique is
to search for dark clouds by Fe I and Fe II resonance absorption superimposed
on the underlying star fields.  There were no reported anomalies during the
execution of this observation.

1.23 Completed GHRS/1 5826 (Diffuse Ionized Gas Around Leo I)

       The Goddard High Resolution Spectrograph (Side 1) was used to obtain
spectra of three QSOs behind the Leo I dwarf galaxy.  The QSOs were used as
probes tp search for highly ionized gas in the outskirts of the dwarf.  The
kinematics of the gas were also be determined.  The proposal completed with
no reported errors.

1.24 Completed GHRS/2 5382 (Boron as a Probe of the formation of the Galactic
Halo)

       The High Resolution Spectrograph (Side Two) was used to make
observations of the low-metallicity halo star BD-13D3442 to help learn more
about the chemical and dynamical evolution of the galaxy. The observations
were executed as scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 16
                                        Successful : 15

                HSTAR #5209 was written to document this unsuccessful
 acquisition, caused
apparently by no stars being                    present. The FHST map which occ
urred less
than an hour            later showed no attitude error. Analysis of this
                occurrence
is ongoing.

                          Scheduled Reacquisitions : 37
                                        Successful : 37

   2.2 FHST Updates:

                              Scheduled : 37
                             Successful : 37

   2.3 Significant HSTARs: None

   2.4 Operations Notes:

The regular monthly checkout of the SAMS operational backup was completed
successfully.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Nothing at this time.

/DMH
                     -END-