HUBBLE SPACE TELESCOPE

                              DAILY REPORT #1371

PERIOD COVERED:  0000Z (UTC) 04/17/95 - 0000Z (UTC) 04/18/95

Daily Status Report as of 108/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Three Sets of WF/PC-2 5167 (Jovian Auroral Lyman-Alpha
Profile: Cycle 4 )

       The WF/PC-2 was used to make observations of the northern auroral
regions of the planet Jupiter to study the excitation processes and
atmospheric properties in this region. An Earth Calibration image was also
taken. FGS #2 fail to acquire Fine Lock before a Type 3 slew at 107/1547Z
(HSTAR 5183). Delay Loss of Lock was set, at end of the Type 3 slew, and
acquisition process was resumed and Fine Lock was achieved on both primary
and secondary FGSs (FGS 1 and 2). Subsequent FHST update showed a large V1
correction which probably contributed at the acquisition taking longer than
expected. No other anomalies were noted.

   1.2 Completed Two 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. 

   1.3 Completed 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.

   1.4 Completed WF/PC-2 5766 (Determination of the Extragalactic distance
Scale - M-101 Carryover)

       The WF/PC-2 was used to make observations of the galaxy NGC-5457 (aka,
M-101) to help improve the estimate of the Hubble Constant. The observations
were completed as scheduled, and no anomalies were reported.

   1.5 Completed WF/PC-2 5411 (The Circumnuclear regions of Seyfert Galaxies:
Cycle 4 Medium)

       The WF/PC-2 was used to make observations of the circumnuclear regions
of Seyfert Galaxy ESO428-G14. Filters were used to isolate several prominent
emission lines, as well as their adjacent continua. The observations were
executed as scheduled, and no anomalies were noted.

   1.6 Completed Two Sets of WF/PC-2 5479 (Subarcsecond Structure in Nearby
AGNs)

       The WF/PC-2 was used to make snapshot observations of the nearby
active galactic nuclei of NGC-4945 and HEAO1143-1 to study the interactions
between the central  engine, the stars, and the interstellar matter in these
AGNs. The observations were executed as scheduled, and no anomalies were
noted. 

   1.7 Completed WF/PC-2 5408 (Star Cluster and CNO Abundance in Blue Compact
Galaxies)

       The WF/PC-2 was used to make observations of the star formation
regions within the low metallicity  blue compact galaxy SBS1415+43 to be used
to determine the size, color, and luminosity of imbedded star clusters. The
observations were executed as scheduled, and no anomalies  were noted.

   1.8 Completed GHRS/1 5594 (GHRS Side 1 Sensitivity Monitor: Cycle 4)

       The High Resolution Spectrograph (Side One) was used to make
calibration observations of star BD28D4211 to monitor the long-term
sensitivity of the system. The observations were completed as planned, and no
anomalies were reported. 

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 6
                                        Successful : 6

                          Scheduled Reacquisitions : 5
                                        Successful : 5

   2.2 FHST Updates: 

                              Scheduled : 10
                             Successful : 10

   2.3 Significant HSTARs: None

   2.4 Operations Notes: 

       There were data inversions at STGT during operational support.

       The RMGA was calibrated yesterday.  All data appeared to be nominal.

FOS Update:

       At 05:17 Z on Day 107 a series of NSSC-1 status buffer messages were
received. At this time the FOS was transitioning from LV to HV on the Blue
Side, while the  GHRS was outputting science data.    Evidently the FOS HV
turn-on created a transient pulse which was interpreted as a frame start by
the CU/SDF.   Delays introduced by the CU/SDF during its reset process led to
two lines of GHRS data being subsequently received back to back by the
CU/SDF, which then disabled the GHRS SD interface.   As a result of these
events, two GHRS observations were lost; however, subsequent  FOS and WFPC-II
observations were nominal.   Another GHRS observation at 11:56 Z which was
part of the same proposal contained commanding to reset the SD interface; it
was nominal.  

3.0 ANOMALY STATUS:

   3.1 Significant New Anomalies: None

   3.2 Significant Unresolved Anomalies: None

4.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH
                     -END-