     SPX-455         SEPTEMBER 25, 1991


                              SPACEWARN Activities
            (All information in this publication was received between
                       August 27, and September 24, 1991.)


A.  List of New International Designations and Launch Dates.  (HQ USSPACECOM
Catalog numbers are in parentheses.)

1991-066A (21713) COSMOS 2156   Sep 19   1991-063A (21700) STS-48      Sep 12
     065A (21706) MOLNIYA 3-41  Sep 17        062A (21694) SOLAR-A     Aug 30
     064A (21702) COSMOS 2155   Sep 13        061A (21688) IRS-1B      Aug 29
     063B (21701) UARS          Sep 12


B.  Text of Launching Announcements.

1991-066A  COSMOS 2156 was launched on September 19, 1991, by the U.S.S.R. using
           the SOYUZ booster rocket, to continue space research.  Initial
           orbital parameters: period 89.6 min, apogee 369 km, perigee 176 km,
           inclination 68.1 deg.

1991-065A  MOLNIYA 3-41, a communications satellite, was launched on September
           17, 1991, by the U.S.S.R. using the MOLNIYA booster rocket.  Initial
           orbital parameters: period 12 hr 17 min, apogee 40,859 km, perigee
           464 km, inclination 62.7 deg.

1991-064A  COSMOS 2155 was launched on September 13, 1991, by the U.S.S.R. using
           the PROTON booster rocket.  The communications satellite has been
           placed in a near geostationary orbit with the following initial
           orbital parameters: 35,850 km from the Earth's surface, inclination
           to the Equator 1.3 deg, period 23 hr, 56 min.

1991-063B  UARS (Upper Atmosphere Research Satellite) was deployed from the
           orbiting shuttle DISCOVERY on September 15, 1991.  The satellite will
           carry out the first systematic, detailed study of the Earth's
           stratosphere, mesosphere, and lower thermosphere.  Initial orbital
           parameters: period 96.2 min, apogee 575 km, perigee 574 km,
           inclination 57.0 deg.

1991-063A  STS-48, the space shuttle DISCOVERY was launched on September 12,
           1991, by the U.S.  Mid-deck payload consists of the Physiological and
           Anatomical Rodent Experiment (PARE) and the Protein Crystal Growth
           (PCG) experiment.  Initial orbital parameters: period 95.4 min,
           apogee 553 km, perigee 538 km, inclination 56.9 deg.  Discovery
           landed in California on September 18, 1991.

1991-062A  SOLAR-A was launched August 30, 1991, from Kagoshima Space Center,
           Japan.  Initial orbital parameters: period 98.0 min, apogee 795 km,
           perigee 526 km, inclination 31.3 deg.  The national name of SOLAR-A
           is YOHKOH (meaning "sunlight" in English).

1991-061A  IRS-1B, an Indian Remote Sensing satellite, was launched August 29,
           1991, by the U.S.S.R. using the VOSTOK booster rocket.  Initial
           orbital parameters: period 102.7 min, apogee 915 km, perigee 859 km,
           inclination 99.2 deg.


C.  Spacecraft Particularly Suited for International Participation (Category I).

    1. Spacecraft with essentially continuous radio beacons on frequencies less
than 150 MHz, or higher frequencies if especially suited for ionospheric or
geodetic studies.  (Updated information since the last issue are bracketed.
SPACEWARN would appreciate suggestions to update this list.)

Acknowledgement:  SPACEWARN appreciates the updates in this section supplied by
Dr. Piero Beni, IROE-CNR, Firenze, Italy.

Designation,     Epoch, Frequency, Power,
National Name    and Orbit Information      Remarks

1966-110A        June 16, 1988              Weak signals.
ATS 1            137.35 MHz                 VHF translator on ~12 hr./day.
                 Inclination: 14.0 deg
1967-111A        June 16, 1988              Weak signals.
ATS 3            136.37 MHz
                 137.35 MHz
                 Location: 105 deg W
                 Inclination: 12.1 deg
1973-081A        September 15, 1988         Operational transit.
OSCAR (NAV) 20   150 MHz at 0.75 W          Also known as NNSS 30200.
                 400 MHz at 1.25 W
                 Inclination: 89.9 deg
1975-100A        June 29, 1991
GOES 1           136.38 MHz  
                 Location: 81.2 deg W
                 Inclination: 10.5 deg
1977-048A        June 27, 1991
GOES 2           136.38 MHz
                 Location: 59.6 deg W
                 Inclination: 9.0 deg
1978-012A        June 19, 1991
IUE              136.86 MHz
                 Inclination: 32.890 deg
1978-062A        June 16, 1991
GOES 3           136.38 MHz
                 Location: 175.0 deg W
                 Inclination: 7.8 deg
1981-044A        March 4, 1991              Removed from service 0204 UT, March
NOVA I           150 MHz at 3.00 W          3, 1991.  Switched to maintenance
                 400 MHz at 5.00 W          frequency at 2127 UT, March 4, 1991.
                 Inclination: 90.0 deg      Also known as NNSS 30480.
1981-057A        [September 12, 1991]
METEOSAT 2       137.078 MHz
                 [Location: 10 deg W]
                 [Inclination: 4 deg]
1984-110A        September 15, 1988         Operational transit.
NOVA III         150 MHz at 3.00 W          Also known as NNSS 30500.
                 400 MHz at 5.00 W
                 Inclination: 90.0 deg
1984-114B        June 27, 1991
MARECS-B2        137.17 MHz
                 Location: 55.5 deg W
                 Inclination: 2.2 deg
1984-123A        June 30, 1991
NOAA 9           137.62 MHz
                 Inclination: 99.168 deg
1985-066B        February 26, 1991          Switched to maintenance frequency
OSCAR (NAV) 30   150 MHz at 1.00 W          and placed in on-orbit storage
                 400 MHz at 2.00 W          2048 UT, February 26, 1991.
                 Inclination: 89.9 deg      Also known as NNSS 30300.
1986-073A        June 30, 1991
NOAA 10          137.50 MHz
                 Inclination: 98.560 deg
1986-086A        July 18, 1991
COSMOS 1791      150 MHz
                 400 MHz
                 Inclination: 82.945 deg
1986-088A        September 15, 1988         Experimental.
POLAR BEAR       150 MHz at 0.75 W          Also known as NNSS 30170.
                 400 MHz at 1.25 W
                 Inclination: 89.9 deg
1987-080A        December 5, 1988           Operational transit.
OSCAR (NAV) 27   150 MHz at 0.75 W          Also known as NNSS 30270.
                 400 MHz at 1.25 W
                 Inclination: 90.3 deg
1987-080B        February 7, 1991           Operational transit.
OSCAR (NAV) 29   150 MHz at 0.75 W          Also known as NNSS 30290.
                 400 MHz at 1.25 W
                 Inclination: 90.3 deg
1988-033A        January 31, 1989           Operational transit.
OSCAR (NAV) 23   150 MHz at 0.75 W          Also known as NNSS 30230.
                 400 MHz at 1.25 W
                 Inclination: 90.4 deg
1988-033B        February 26, 1991          Operational transit.
OSCAR (NAV) 32   150 MHz at 1.00 W          Also known as NNSS 30320.
                 400 MHz at 2.00 W
                 Inclination: 90.4 deg
1988-051A        [September 12, 1991         Transmits on command.]
METEOSAT 3       137.080 MHz
                 [Location: 50 deg] 
1988-052A        September 15, 1988         Operational transit.
NOVA II          150 MHz at 3.00 W          Also known as NNSS 30490.
                 400 MHz at 5.00 W
                 Inclination: 90.0 deg
1988-074A        September 15, 1988         Stored in orbit at an offset
OSCAR (NAV) 25   150 MHz at 0.75 W          frequency.
                 400 MHz at 1.25 W          Also known as NNSS 30250.
                 Inclination: 90.0 deg
1988-074B        March 8, 1990              Stored in orbit at an offset
OSCAR (NAV) 31   150 MHz at 1.00 W          frequency.
                 400 MHz at 2.00 W          Also known as NNSS 30310.
                 Inclination: 98.971 deg
1988-089A        June 28, 1991
NOAA 11          136.77 MHz
                 137.77 MHz
                 Inclination: 99.031 deg
1989-017A        July 18, 1991
COSMOS 2004      149.94 MHz
                 399.84 MHz
                 Inclination: 82.955 deg
1989-042A        July 18, 1991
COSMOS 2026      149.97 MHz
                 399.92 MHz
                 Inclination: 82.941 deg
1990-017A        July 18, 1991
NADEZHDA-2       150 MHz
                 400 MHz
                 Inclination: 82.955
1990-023A        July 19, 1991
COSMOS 2061      149.94 MHz
                 399.84 MHz
                 Inclination: 82.936 deg
1990-036A        July 19, 1991
COSMOS 2074      149.91 MHz
                 399.76 MHz
                 Inclination: 82.944 deg
1990-083A        July 18, 1991
COSMOS 2100      149.97 MHz
                 399.92 MHz
                 Inclination: 82.938 deg
1991-007A        July 18, 1991
COSMOS 2123      150 MHz
                 400 MHz
                 Inclination: 82.923 deg
1991-019A        July 18, 1991
NADEZHDA-3       150 MHz
                 400 MHz
                 Inclination: 82.929 deg
1991-029A        July 18, 1991
COSMOS 2142      150.03 MHz
                 400.08 MHz
                 Inclination: 82.953 deg


    2. Global Positioning System satellites useful for navigational purposes and
geodetic studies.  ("NNN" denotes no national name; updated information since
the last issue are bracketed.  SPACEWARN would appreciate suggestions to update
this list.)

Acknowledgement:  SPACEWARN appreciates the help of Dr. Erricos C. Pavlis, Space
Geodesy Branch, Code 926, GSFC, in updating the following:


Designation,     Epoch, Frequency,
National Name    and Orbit Information      Remarks

[1978-093A        September 7, 1991          Also known as GPS 3 (Global
NNN              1575.42 MHz                Positioning Satellite) and
                 1227.60 MHz                NAVSTAR 3.
                 Inclination 63.682 deg
1983-072A        September 8, 1991          Also known as NAVSTAR 8.
NNN              1575.42 MHz
                 1227.60 MHz
                 Inclination 63.601 deg
1984-059A        September 8, 1991          Also known as USA 1 and NAVSTAR 9.
NNN              1575.42 MHz
                 1227.60 MHz
                 Inclination 63.363 deg
1984-097A        September 9, 1991          Also known as NAVSTAR 10.
USA-5            1575.42 MHz
                 1227.60 MHz
                 Inclination 62.973 deg
1985-093A        September 8, 1991          Also known as NAVSTAR 11.
USA-10           1575.42 MHz
                 1227.60 MHz
                 Inclination 64.115 deg
1989-013A        August 17, 1991            Also known as GPS 2-1 (2nd
USA-35           1575.42 MHz                Generation Global Positioning
                 1227.60 MHz                Satellite) and  NAVSTAR 2-01.
                 Inclination 55.033 deg
1989-044A        August 19, 1991            Also known as GPS 2-2 and
USA-38           1575.42 MHz                NAVSTAR 2-02.
                 1227.60 MHz
                 Inclination 54.937 deg
1989-064A        July 9, 1991               Also known as GPS 2-3 and
USA-42           1575.42 MHz                NAVSTAR 2-03.
                 1227.60 MHz
                 Inclination 54.873 deg
1989-085A        July 6, 1991               Also known as GPS 2-4 and
USA-47           1575.42 MHz                NAVSTAR 2-04.
                 1227.60 MHz
                 Inclination 54.368 deg
1989-097A        August 24, 1991            Also known as GPS 2-5 and
USA-49           1575.42 MHz                NAVSTAR 2-05.
                 1227.60 MHz
                 Inclination 55.058 deg
1990-008A        August 23, 1991            Also known as GPS 2-6 and
USA-50           1575.42 MHz                NAVSTAR 2-06.
                 1227.60 MHz
                 Inclination 54.329 deg
1990-025A        August 24, 1991            Also known as GPS 2-7 and
USA-54           1575.42 MHz                NAVSTAR 2-07.
                 1227.60 MHz
                 Inclination 55.202 deg
1990-068A        August 23, 1991            Also known as GPS 2-8 and
USA-63           1575.42 MHz                NAVSTAR 2-08.
                 1227.60 MHz
                 Inclination 54.671 deg

1990-088A        August 24, 1991            Also known as GPS 2-9 and
USA-64           1575.42 MHz                NAVSTAR 2-09.
                 1227.60 MHz
                 Inclination 54.984 deg
1990-103A        September 4, 1991          Also known as GPS 2-10 and
USA-66           1575.42 MHz                NAVSTAR 2A-01.
                 1227.60 MHz
                 Inclination 54.893 deg
1991-047A        September 17, 1991         Also known as GPS 2-11 and
USA-71           1575.42 MHz                NAVSTAR 2A-02.
                 1227.60 MHz
                 Inclination 55.275]


    3. Optical objects used for geophysical studies.  (These objects are also
suitable for studies of air density and atmospheric winds.  Additional research
interest is indicated by + for gravitational fields.  SPACEWARN would appreciate
suggestions to update this list.)

                   + 1965-098C ALOUETTE  2 (rocket)
                     1970-034B CHINA 1     (rocket)
                     1971-016A COSMOS  398
                   + 1984-106A COSMOS 1603
                   + 1988-021B IRS-1A      (rocket)


    4. Satellites useful for simultaneous observation programs with small
cameras.  ("NNN" denotes no national name.  SPACEWARN would appreciate
suggestions to update this list.)

                              Apogee   Perigee
                       Incl    (km)     (km)    Magn      Remarks

1963-049A  NNN         89.9    1086     1060     +5   cylinder, 4.8 x 1.4 m
1964-001A  NNN         69.9     927      904     +5   cylinder, 8 x 1.5 m
1964-053A  COSMOS 44   65.1     817      608     +4   cylinder
1965-070F  COSMOS      56.1    1515     1357     +5   rocket body
1965-073F  COSMOS      56.1    1686     1387     +5   rocket body
1965-089A  GEOS 1      59.4    2275     1113          octahedron and pyramid,
                                                        0.81 x 1.22 m
1968-002A  GEOS 2     105.8    1570     1082          octahedron and pyramid,
                                                        0.81 x 1.22 m
1975-027A  GEOS 3     115.0     858      818          octahedron and pyramid,
                                                        1.11 x 1.22 m
1976-039A  LAGEOS     109.8    5946     5837          sphere, 0.6 m diameter


    5. Satellite objects that are nearing their decay into the atmosphere.
(Orbital observations of these objects during the decaying phase are useful for
atmospheric studies.  Note: For maneuverable spacecraft the prediction may be
invalid.)


        Objects predicted to decay within 60 days from September 19, 1991

                       Expected Decay Dates 1991

1961-OMI 138                Nov 16	1986-017DE                  Nov 16
1965-082MV                  Nov  3	1986-017DP                  Nov  5
1965-082QU                  Nov 16	1986-017DS                  Nov  5
1967-014N                   Oct  2	1986-017DV                  Oct 20
1967-039B                   Oct 28	1986-017EV                  Oct  5
1968-097AC                  Oct  4	1886-017FA                  Oct  5
1970-025AE                  Nov 16	1986-017FC                  Oct  9
1972-011A    (COSMOS 476)   Nov  1	1986-017FD                  Sep 31
1975-056A    (COSMOS 744)   Oct 13	1986-019VB                  Nov  6
1978-026DE                  Sep 30	1987-012A     (ASTRO-C)     Nov 11
1979-017KE                  Nov 16	1991-047C                   Oct 30
1979-017KM                  Oct 22	1991-064B                   Oct  8
1981-053DT                  Oct 15	1991-065B                   Sep 30
1983-022B                   Oct 23	


    6. Actual decays.

                            Actual Decay Dates 1989

                       1989-004D                   Jul 31


                            Actual Decay Dates 1990

1989-081F                   Sep 28	1989-101F                   Jul 31
1989-098E                   Sep  4	1990-016E                   Dec  3
1989-098F                   Jun  6	1990-016F                   Sep  4


                            Actual Decay Dates 1991

1967-014K                   Aug 30	1976-039B                   Sep 22
1967-092H                   Sep 12	1976-120U                   Sep  3
1968-017D                   Sep  8	1976-120AR                  Sep 15
1968-097AA                  Aug 24	1977-065BV                  Sep 22
1968-097CC                  Sep  6	1977-121BT                  Sep 15
1971-059A   (METEOR 1-9)    Aug 27	1978-026GY                  Sep  6
1972-058AQ                  Aug 31	1979-017CZ                  Sep 10
1972-058DG                  Sep 10	1983-113BF                  Sep  2
1975-052EH                  Aug 28	1986-017CZ                  Aug 25
1975-052EP                  Aug 20	1986-017DL                  Aug 24
1975-052FP                  Aug  5	1986-017DN                  Aug 28
1975-052FQ                  Aug 17	1986-017DQ                  Sep  2
1975-052GC                  Aug 10	1986-017DW                  Sep  8
1975-052GE                  Aug 29	1986-017EB                  Sep 13
1975-052GV                  Aug 31	1986-017EH                  Sep 15
1975-052HG                  Aug  7	1986-017EK                  Sep  1
1975-052JH                  Sep  6	1986-017EL                  Sep  9
1975-052JL                  Aug 28	1986-017EM                  Sep 20
1976-021D                   Jul  1	1986-017EP                  Sep 11

1986-017EQ                  Aug 27	1990-105AB                  Aug 26
1986-017ER                  Sep  6	1991-014E                   Sep 10
1986-017ES                  Aug 28	1991-052E                   Aug 28
1986-017ET                  Sep  7	1991-053B                   Sep  2
1986-017EU                  Aug 31	1991-053C                   Sep  3
1986-017FE                  Aug 29	1991-058A    (RESURS-F13)   Aug 20
1986-017FJ                  Aug 29	1991-058C                   Sep 21
1986-019CA                  Sep 13	1991-058D                   Sep 21
1987-036C                   Sep 13	1991-058E                   Sep 22
1989-016D                   Sep  4	1991-060B                   Sep  7
1989-052E                   Aug 15	1991-063A      (STS-48)     Sep 18
1990-022A   (COSMOS 2060)   Sep  1	1991-064C                   Sep 14
1990-105J                   Sep 20	1991-064D                   Sep 15
1990-105L                   Sep  2	1991-066B                   Sep 22


D.  Launching Reports and Updated Information.

    1. Postlaunch Report.  (This section covers only those reports that are sent
directly to us by the national agencies.)

       The Institute of Space and Astronautical Science (ISAS) successfully
launched the SOLAR-A satellite at 02:30Z on August 30, 1991, from the Kagoshima
Space Center, at Uchinoura, Kagoshima Prefecture.  The main objective of this
satellite is to study the solar flare with hard and soft x-ray telescopes, 
employing opportunities during the solar maximum period.

       Epoch                     02H 38M 39.000S August 30, 1991 (UTC)
       Semi-major Axis           7033.3714 km
       Eccentricity                 0.01952
       Ascending Node              54.0858 deg
       Argument of Perigee         47.0649 deg
       Mean Anomaly                54.6938 deg
       Period                      97.8762 min

       SOLAR-A transmit 2256.22 MHz with 0.5/0.2 watts and 8460.81 MHz with
       0.8/0.05 watts, respectively.

       SOLAR-A is renamed "YOHKOH," meaning sunlight in English.


    2. Updated Information

1991-060A (21668) BS-3B (YURI-3B)
       The satellite is positioned at an altitude of 36,000 km, at 110 deg
       longitude.


                     CORRECTION to Section C. 5 of SPX-451

       The decay of 1991-020A PROGRESS-7 should read PROGRESS M-7.  The decay
of 1981-020A PROGRESS M-7 is incorrect and should be deleted.
