Daily                News
Tuesday, August 3, 1993  Two Independence Square; Washington, D.C.  
Audio Service:202/358-3014      


 % STS-51 mission status;
 % Galileo and Magellan Update


* * * * * * * * * * * * * * * *

Concerned about the the Perseid meteor shower, which is expected to
occur on the evening of August 11, NASA mission managers decided to
postpone the launch of Space Shuttle Discovery until August 12.  The
launch window will open at 9:10 a.m. EDT.  The STS-51 mission is
scheduled to concluded on August 21.  However there is a possibility of
extending the mission a day.

Discovery's crew of 5 will deploy the ACTS-TOS payload and deploy and
retrieve the ORFEUS-SPAS science satellite.  Crew members also will
perform a spacewalk during this STS-51 mission.

Technicians at the Kennedy Space Center continue launch countdown
preparations.  The countdown is scheduled to begin at 9:30 a.m. on
Monday, August 9.

* * * * * * * * * * * * * * * *

Galileo will encounter asteroid Ida on August 28, 1993.  Scientific
observations will be recorded for later playback.  The spacecraft
condition is excellent and the high-gain antenna is still only partly
deployed.  Therefore, the scientific and engineering data are being
transmitted via the low-gain antenna, which the mission team is
planning to use for the Jupiter mission.  Galileo will go into
Jupiter's obiter on December 7, 1995.

 The Magellan aerobraking program, which began May, 25, is expected to
be complete early this month.  The spacecraft will then be in a lower
and more circular orbit for higher-resolution gravity mapping of higher
latitudes and the poles.  The aerobraking procedure of going into
Venus's upper atmosphere each orbit, has provided new knowledge of the
atmospheric properties.

* * * * * * * * * * * * * * * *

Here's the broadcast schedule for Public Affairs events on NASA TV.  
Note that all events and times may change without notice and that all 
times listed are Eastern. 



Tuesday, August 3, 1993

        noon      NASA Today featuring stories on the STS-51 mission and the
 	          HRMS experiment.
        12:15 pm  Aeronautics & Space Report.
        12:30 pm  Eating and Sleeping in Space.
         1:00 pm  Women's Health Issues: Space-based Medical Research.
         2:00 pm  Starfinder # 14.
         2:30 pm  Journey Through the Solar System; Vnus.
         3:00 pm  TQM #14.

Wednesday, August 4, 1993

        noon      NASA Today.
        12:15 pm  Aeronautics & Space Report.
        12:30 pm  Quieter Faster and Safer Aircraft.
         1:00 pm  Space Shuttle: A Remarkable Flying Machine.
         2:00 pm  Starfinder # 15.
         2:30 pm  Journey Through the Solar System; Mars.
         3:00 pm  TQM #15.



        
The editor is  Sonja Maclin  on  202/358-1761 or SMACLIN on 
NASAmail.  NASA TV is carried on GE Satcom F2R, transponder 
13, C-Band, 72 degrees West Longitude, transponder frequency is 
3960 MHz, audio subcarrier is 6.8 MHz, polarization is vertical.