Re: H-2/COMETS Launch

Ron Lee (ronlee@pcisys.net)
Fri, 20 Feb 1998 19:24:10 -0700

Comet
1 80808U 980xxA   98052.34835927  .00000050  00000-0  00000-0 0    15
2 80808  28.5060 305.3090 7270160 178.9770   0.4760  2.28750000    11

The above elset was from the SECO-2 parameters.   Folks in South america
could see it.    It will become visible in the US starting in the
south-eastern US as it moves towards apogee.   Mike McCants may have a
chance to see it
My visibility is poor in Colorado.   I am assuming that the payload will
be reasonably close for the first orbit...probably a bit late compared to
this elset.

It is not perfect.   at insertion, I am off about 0.5 degrees (farther south)
and .075 degrees too far east.   I assume that as it approaches apogee,
these errors become less important.  But anyone looking for it should
scan to account for time and position errors.

Ron "Journeyman Neophyte Novice Elset Dude" Lee
At 05:47 PM 2/20/98 -0800, you wrote:
>Hello all,
>
>Can someone convert these parameters to two-line orbital elements for each
>event. They are for the COMETS launch tomorrow morning at 2:55 a.m. eastern
>time (07:55 UTC).
>
>                                    SECO-2           COMETS SEPARATIO
>EPOCH (D/HH:MM:SS.SSS):             052/08:21:38.241 052/08:22:12.860
>PERIOD (MIN):                        627.512          635.708
>INCLINATION (DEG):                   28.506           28.500
>ECCENTRICITY (DEG):                 0.727016         0.729365
>SEMI-MAJOR AXIS (KM):               24279.6066       24490.5621
>ARGUMENT OF PERIGEE (DEG):          178.977          178.998
>RA OF ASCENDING NODE (DEG):         305.309          305.309
>MEAN ANOMALY (DEG):                   0.476            0.794
>START ORBIT TIME (HHH:MM:SS.SSS)MET:000:26:38.000    000:27:12.000
>END ORBIT TIME (HHH:MM:SS.SSS)MET:  021:00:00.000    021:00:00.000
>HEIGHT (KM):                          235.3983         247.8481
>INJECTION LATITUDE (DEG):             1.17S            2.630S
>INJECTION LONGITUDE (DEG):          211.01E          213.534E
>INJECTION INERTIAL AZIMUTH (DEG):   118.488          118.394
>INJECTION TIME (D/HH:MM:SS.SSS):    052/08:21:38.241 052/08:22:12.860
>
>                                    SECO-3           H-2 EOM
>EPOCH (D/HH:MM:SS.SSS):             052/08:35:18.540 052/10:03:20.000
>PERIOD (MIN):                        475.154          479.347
>INCLINATION (DEG):                   28.215           27.927
>ECCENTRICITY (DEG):                 0.673177         0.670829
>SEMI-MAJOR AXIS (KM):               20170.4974       20288.9841
>ARGUMENT OF PERIGEE (DEG):          177.647          177.739
>RA OF ASCENDING NODE (DEG):         304.294          304.806
>MEAN ANOMALY (DEG):                  11.505           77.560
>START ORBIT TIME (HHH:MM:SS.SSS)MET:000:40:20.000    002:08:20.000
>END ORBIT TIME (HHH:MM:SS.SSS)MET:  016:00:00.000    017:00:00.000
>HEIGHT (KM):                         2235.6427       19209.8242
>INJECTION LATITUDE (DEG):            25.05S           15.611S
>INJECTION LONGITUDE (DEG):          264.57E          331.092E
>INJECTION INERTIAL AZIMUTH (DEG):   103.606           66.531
>INJECTION TIME (D/HH:MM:SS.SSS):    052/08:35:18.540 052/10:03:20.000
>
>Thanks.
>
>
>Keith Stein
>Associate Technical Editor
>
>Launchspace Publications, Inc.
>http://www.launchspace.com
>(703) 749-2324, ext 114
>(703) 749-3177 (fax)
>
>
>