Monster Iridium Prediction for San Antonio, Texas

Ed Cannon (
Tue, 07 Oct 1997 05:04:15 -0400

Using Randy John's DOS program, version 0.40, for my parents' and sister's 
location in San Antonio, Texas (98.6400000W, 29.4000000N, 182m), if I read 
the UTC correctly I get what may be a monster or at least whopper Iridium 
flare *very* near to Polaris (alpha Ursa Minor)!  The UTC time is 11:06:59 
Thursday.  I believe that a "perfect" mirror angle is zero; this prediction 
is for a very small angle.  I'm not sure how to interpret the Phase and 
Illumination in relation to the very small mirror angle.

Day    Date   Time CDT   AL  AZI  Angle  R.A.   Dec.    Sun   Phase  Illum.
Thurs. 10/9  6:06:59 AM  31  360   0.17  05:01  88:29  -21.2    83    56%

Our weather's not very favorable in Central/South Texas this week, but this 
one may be a "cloud-lighter".  

Ed Cannon
Austin, Texas, USA -- 30.3086N, 97.7279W, 165m