HUBBLE SPACE TELESCOPE

       DAILY REPORT #2511

PERIOD COVERED:  0000Z (UTC) 12/01/99 - 0000Z (UTC) 12/02/99

Daily Status Report as of 336/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

Since HST remains in Zero Gyro Sun Point (ZGSP), no science observations 
were performed.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:

                                         No activity

    2.2 FHST Updates:

                                         No activity

    2.3 Operations Notes:

        The HST is still in ZGSP.

        ESTR3 was positioned to 50 percent on track 1 for Servicing Mission 
3A (SM3A) as directed by ROP RD-7A.

        High Gain Antenna slews were performed at 335/1706Z per an 
operations request.

        Bright Object Detection was disabled in the PSEA for the Aperture 
Door at 335/1822Z.

        As described in HSTAR 7391, the tracker 2 mounting bracket 
temperature (TFHST2MB) flagged out-of-limits low at 335/220845Z with a low 
value of -4.86.  Per an operations note, the limit was changed to -5.00.

        The flight operations team moved to the Building 23 back-up 
facility at 336/1000Z in preparation for the simulation that will be 
conducted today.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Today, a simulation of the new rendezvous sequences, necessitated 
by the ZGSP entry, will be conducted from 8:00 a.m. until approximately 
8:00 p.m.

        Tomorrow, the PSEA/RMGA On-Orbit Test will be resumed.

        SM3A, currently scheduled for December 9, 1999.

/CAW