HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2205

PERIOD COVERED:  0000Z (UTC) 09/09/98 - 0000Z (UTC) 09/10/98

Daily Status Report as of 253/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed NIC/2 7418 (Imaging of Younf Stellar Object Circumstellar
Nebulosity)

       WF/PC-2 observations have shown that a young stellar objectcalled
PV-Cep in the nearby Taurus molecular clouds is seen only indirectly via
scattered light.  New NICMOS (Camera Two) images will be compared with the
existing WFPC2 images and with model reflection nebulae to constrain the
circumstellar density distributions.  The dark absorption lanes already
seen in these systems suggest that the NICMOS images will reveal edge-on
disks similar to the HST results for HH 30, and thus allow direct
observation of the disk geometry.  The observations were completed with no
reported anomalies

   1.2 Completed WF/PC-2 6681 (Evolution of Pre-Main Sequence Circumstellar
Nebulosity)

       The WF/PC-2 was used to make observations of PV-Cep to study the
evolution of pre-main sequence circumstellar nebulosity.  Initial HST
results from imaging of disks around pre-main sequence stars provide
compelling justification to observe a broader sample of young stars.  The
observations were completed as planned, and no anomalies were reported.

   1.3 Completed Two 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.

   1.4 Completed Two Sets of STIS/CCD 7635 (STIS CCD Hot Pixel Annealing)

       The Space Telescope Imaging Spectrograph (CCD) was used to test the
hot pixel annealing procedure.  The effectiveness of the CCD hot pixel
annealing process is assessed by measuring the dark current behavior before
and after annealing and by searching for any window contamination effects.
During the final iteration of this proposal the acquisition default to fine
lock on one FGS only, described in HSTAR 6656 and in 2.1,  occurred.
Otherwise, the observations were completed as planned, and no further
problems were reported.

   1.5 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.

   1.6 Completed Three Sets of NIC/1/2/3 7596 (NICMOS MULTIACCUM Dark
Characterization)

       The Near-Infrared Camera Multi-Object Spectrograph (Cameras One, Two
and Three) was used to make a NICMOS MULTIACCUM dark characterization.  The
purpose of this proposal is to monitor the darks using three different
MULTIACCUM sequences.  The observations were executed as scheduled, with no
anomalies.

   1.7 Completed NIC/1 7867 (NICMOS Imaging of the Dusty CfA Seyfert Nuclei)

       The Near Infrared Camera (Camera One) was used to make observations
of the Seyfert Galaxy UGC-12138.  These data will allow us to determine if
the Seyfert Type 1/2 dichotomy is best explained by the unified model, the
evolutionary picture, or a combination of both of these scenarios.  The
observations were executed as scheduled, and no anomalies were reported.

   1.8 Completed NIC/1/2/3 7849 (Metallicity and the Cepheid Distance Scale)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of Cepheid variable stars in the IC1613V01 galaxy.  The
local distance scale to galaxies is largely based on the Cepheid
period-luminosity relation.  Motivated by the goal of measuring an accurate
value of the Hubble constant, HST has been used successfully to discover
scores of Cepheid variables in each of about 20 galaxies.  During this
proposal the acquisition default to fine lock on one FGS only, described in
HSTAR 6656 and in 2.1,  occurred.  Otherwise, the observations were
executed as scheduled, and no further anomalies were noted.

   1.9 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 UM265.  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.

   1.10 Completed Five Sets of STIS/CCD 8062 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations take in parallel with the prime science
observations.  The observations were completed as planned, with no
problems.

   1.11 Completed 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.

   1.12 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, with no problems.

   1.13 Completed 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.

   1.14 Completed Four Sets of NIC/1/2/3 7899 (An IR Search For faint
Companions to Pleiades Very Low-Mass Stars and Brown Dwarfs)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of PPL01, ROQUE16, ROQUE25 and PPL14.  This is part of a
infrared campaign to search for faint companions to Pleiades very low-mass
stars and brown dwarfs.  The Pleiades has been the best site for brown
dwarf {BD} searches, with half of the presently "confirmed" BDs being
Pleiades members.  The observations were executed as scheduled, with no
anomalies.

   1.15 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.

   1.16 Completed STIS/MA1/MA2 7950 (Cycle 7 MAMA Dark Measurements)

       The Space Telescope Imaging Spectrograph (MA1 and MA2) was used to
make a dark calibration image. This is to establish if the detectors are
performing nominally, that no internal movement of the MCP has taken place,
and establish dark level in orbit for a given operating temperature.  These
darks will be used in later image reduction and also trended over
instrument life time as indicators of detector degradation or damage.  The
observations were completed as planned, and no problems were reported.

   1.17 Completed S/C 5582 (FOC/48 Monthly Activation (Camera Section
Only): Cycle 4)

        This proposal was executed as scheduled, and no anomalies were noted.

   1.18 Completed NIC/1/2/3 7827 (The Structure of Circumbinary Material in
Multiple T-Tauri Systems)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the T-Tauri class system XZ-Tau to study the structure
of its circumbinary material.  Recent studies of T-Tauri populations in
nearby star forming clouds have shown that the majority of stars exist in
multiple {binary or higher} systems.  The observations were completed as
planned, and no problems were reported.

   1.19 Completed NIC/2 6767 (A Search for Brown Dwarfs and Luminous Young
Planets in the Hyades)

       The Near Infrared Camera (Camera Two) was used to make observations
of the brown dwarf star RHY080 which is located in the Hyades Cluster.
This is to search for substellar companions orbiting low-mass Hyades M
class dwarf stars.  Differential imaging was used using methane and water
band (on/off) filter pairs.  The observations were completed as planned,
and no problems were reported.

   1.20 Completed NIC/2 7441 ()

Procyon

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 13
                                        Successful : 13

       The acquisition at 252/093327Z defaulted to fine lock on FGS-3 when
FGS-1 experienced a walkdown failure.  HSTAR 6656 was written.  The
proposals described in 1.4 and 1.8 may have been affected.

                          Scheduled Reacquisitions : 2
                                        Successful : 2

   2.2 FHST Updates:

                              Scheduled : 26
                             Successful : 23

       The full mode updates scheduled for 252/224631Z and at 252/224916Z
failed due to FHST-2.  The subsequent acquisition was successful, and a map
taken at 252/230016Z showed only a slightly higher error in roll than is
normal.  HSTAR 6657 was written.

       As documented in HSTAR 6658, tthe roll delay update at 253/002118Z
failed due to FHST-2.  Attitude had not changed since the previous failures
(see previous paragraph).  A subsequent full mode update was successful as
was the acquisition at 253/002418Z.

   2.3 Operations Notes:

       Using ROP SR-1, the SSR EDAC error counter was cleared once.

       Two IP tests were successfully completed with the RF SOC via
TDRS-East from 252/1100Z to 252/1143Z and from 252/1248Z to 252/1323Z.
During each test NOOP and FIVEBLCK procedures were executed and NSSC-1 and
DF-224 SPC loads were uplinked.  One problem was noted during the first
test session, when the CDI-B counter incremented from 0 to 1 and from 1 to
0 in PRS.  This problem was attributed to noisy data due to a weak signal
when TDRS was configured in cross polarization.  During the second session,
the correct polarization was in place.

       The Battery #6 Capacity Check Test continues.  The battery began
charging at 252/1640Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH