Delta 2/Thor 3 Elset

Ron Lee (ronlee@pcisys.net)
Sat, 06 Jun 1998 09:41:27 -0600

Thor 3  22:23 UT, 9 Jun 98
1 99999U 98-0xx A 98160.99180556  .00000040  00000-0  00000-0 0    18
2 99999  20.2900  51.0280 6953090 358.6830   1.5930  2.11625000    17

Thanks for posting the info Keith. The above elset is based on the 
spacecraft separation data.  The transfer orbit insertion burn occurs
north of Australia in daylight.  However, the ascent up to the first
apogee is well placed for western hemisphere observers.   But that is sometime
well after the burn so it will likely require optical aid or even a 
telescope to observe.

This elset coincides with the lat/long but is about 20 seconds early.
I am still not certain about how well my mean motion matches the actual
period but in this case the possible error at least for the first rev
should be trivial.

If anyone knows when the geosynchronous burn occurs that may allow 
someone to observe it...maybe even me!!!!!!

Ron Lee





At 06:12 PM 6/5/98 -0700, you wrote:
>DELTA 2/THOR 3 NOMINAL ORBITS
>
>                                    SECO-1           SECO-2
>EPOCH (D/HH:MM:SS.SSS):             160/22:42:57.100 160/22:56:02.400
>PERIOD (MIN):                       87.810           100.856
>INCLINATION (DEG):                  29.209           28.169
>ECCENTRICITY (DEG):                 0.001256         0.089358
>SEMI-MAJOR AXIS (KM):               6544.2131        7177.2961
>ARGUMENT OF PERIGEE (DEG):          136.194          181.058
>RA OF ASCENDING NODE (DEG):         51.061           50.990
>MEAN ANOMALY (DEG):                 352.663          1.429
>START ORBIT TIME (HHH:MM:SS.SSS)MET:000:09:57.100    000:23:02.400
>END ORBIT TIME (HHH:MM:SS.SSS)MET:  000:23:02.400    001:10:22.200
>HEIGHT (KM):                        151.6181         152.9354
>INJECTION LATITUDE (DEG):           22.44N           1.345S
>INJECTION LONGITUDE (DEG):          304.95E          351.374E
>INJECTION INERTIAL AZIMUTH (DEG):   109.346          118.156
>INJECTION TIME (D/HH:MM:SS.SSS):    160/22:42:57.100 160/22:56:02.400
>
>                                    SECO-3           TECO
>EPOCH (D/HH:MM:SS.SSS):             160/23:43:22.200 160/23:46:19.400
>PERIOD (MIN):                       116.180          680.113
>INCLINATION (DEG):                  26.680           20.290
>ECCENTRICITY (DEG):                 0.018213         0.695335
>SEMI-MAJOR AXIS (KM):               7887.0647        25618.1557
>ARGUMENT OF PERIGEE (DEG):          303.502          358.670
>RA OF ASCENDING NODE (DEG):         51.234           51.028
>MEAN ANOMALY (DEG):                 48.119           0.598
>START ORBIT TIME (HHH:MM:SS.SSS)MET:001:10:22.200    001:13:19.400
>END ORBIT TIME (HHH:MM:SS.SSS)MET:  001:13:19.400    001:15:12.200
>HEIGHT (KM):                        1409.4698        1413.6559
>INJECTION LATITUDE (DEG):           3.08S            0.692N
>INJECTION LONGITUDE (DEG):          151.12E          158.159E
>INJECTION INERTIAL AZIMUTH (DEG):   63.472           69.680
>INJECTION TIME (D/HH:MM:SS.SSS):    160/23:43:22.200 160/23:46:19.400
>
>                                    S/C SEPARATION   SECO-4
>EPOCH (D/HH:MM:SS.SSS):             160/23:48:12.200 161/00:08:08.800
>PERIOD (MIN):                       680.045          103.970
>INCLINATION (DEG):                  20.290           26.562
>ECCENTRICITY (DEG):                 0.695309         0.088440
>SEMI-MAJOR AXIS (KM):               25616.4377       7324.2691
>ARGUMENT OF PERIGEE (DEG):          358.683          258.916
>RA OF ASCENDING NODE (DEG):         51.028           50.565
>MEAN ANOMALY (DEG):                 1.593            170.271
>START ORBIT TIME (HHH:MM:SS.SSS)MET:001:15:12.200    001:35:08.800
>END ORBIT TIME (HHH:MM:SS.SSS)MET:  010:00:00.000    006:00:00.000
>HEIGHT (KM):                        1466.5883        1579.4782
>INJECTION LATITUDE (DEG):           3.36N            25.070N
>INJECTION LONGITUDE (DEG):          164.90E          219.012E
>INJECTION INERTIAL AZIMUTH (DEG):   69.935           80.621
>INJECTION TIME (D/HH:MM:SS.SSS):    160/23:48:12.200 161/00:08:08.800
>
>
>Keith Stein
>Associate Technical Editor
>
>Launchspace Publications, Inc.
>http://www.launchspace.com
>
>