GFO/ORBCOMM Obs, 13 Feb 98

Ron Lee (ronlee@pcisys.net)
Fri, 13 Feb 1998 06:08:02 -0700

Set up the 8 inch telescope this morning for a nicely spaced in time,
but close in position, pass of the 98-007 objects.   Timing between 
them was 20-30 seconds and I only had to make a slight change in right 
ascension to get to the next viewing location.

The pass, just east of Arcturus, was at 5:25 to 5:27 AM local
or 12:25 UT. References to Name and number are from the elsets below:

The first object, #25160, MAY have been fluctuating but I am uncertain
of that.

Second was #25159, an ORBCOMM.  I mad a mental note that it WAS fluctating.
Seems odd but that was my obs.

Third was #25158, another ORBCOMM.  This was different in that it was much 
brighter than all the other objects...possibly 5th magnitude while the others
were 7-8.

The fourth and fifth objects, #25161, and #25157 (GFO), were steady and 
faint but easy to see.  

Ron Lee

GFO                                              877 x 781 km
1 25157U 98007A   98043.22204666  .00001658  00000-0  83749-3 0    92
2 25157 107.9867  30.8304 0066621 185.7156 174.3213 14.18883248   246
Orbcomm FM3                                      875 x 782 km
1 25158U 98007B   98043.85617129  .00000559  00000-0  32121-3 0    80
2 25158 107.9924  32.1066 0064901 184.8463 175.2089 14.19126064   328
Orbcomm FM4                                      875 x 781 km
1 25159U 98007C   98043.22160925  .00006853  00000-0  32505-2 0    87
2 25159 107.9863  30.8344 0064580 185.3871 174.6549 14.19263287   230
Celestis+Taurus r ?                              873 x 782 km
1 25160U 98007D   98043.78514440 -.00001647  00000-0 -70534-3 0    77
2 25160 107.9871  31.9634 0063409 184.9644 175.0865 14.19466842   314
Orbcomm deb ?                                    876 x 782 km
1 25161U 98007E   98043.15140120 -.00004305  00000-0 -19560-2 0   142
2 25161 107.9875  30.6911 0065373 185.5930 174.4516 14.19006958   224