Re: GFO/ORBCOMM Obs, 13 Feb 98

Ron Lee (ronlee@pcisys.net)
Fri, 13 Feb 1998 18:37:39 -0700

Those be the names on the elsets as I get them.

Thanks for the update on the correct name.   Do I win a coffee mug
for being the first to see them (grovel grovel)?

Ron Lee

>
>     Interesting to note Ron's categorization of objects associated with 
>     this week's Taurus launch.
>     
>     I asked my colleagues in Orbcomm's Flight Dynamics Group what objects 
>     were really there (noting Ron's 'Orbcomm deb?') note and the response 
>     was that there are five (5) objects: 
>     
>          GFO
>          Orbcomm sat G1 (FM3)
>          Orbcomm sat G2 (FM4)
>          3rd stage of Taurus rocket.
>          DPAF (adapter between GFO and Orbcomm)
>        
>     There is no Orbcomm debris!
>
>     Eric 
>     
>
>
>______________________________ Reply Separator
_________________________________
>Subject: GFO/ORBCOMM Obs, 13 Feb 98 
>Author:  <SeeSat-L@cds.plasma.mpe-garching.mpg.de> at INTERNET
>Date:    13-02-98 06:08
>
>
>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
>     
>     
>
>
>