Well that was a fun adventure! As Neville pointed out, this pass was only 20 minutes into twilight so getting setup and aligned before the pass was going to be interesting. Normally I track a couple of passes before hand. In this case it was 5 minutes until the pass and I didn't even have alignment stars yet! (sound like a good excuse for getting that 10" star hopping Dob I've been wanting). Running out of time, I dropped back, kicked the scope into "Sky Align" mode and picked the only three objects I had available, Arcturus, Jupiter and that tiny alignment speck in the sky the Moon. Trying to think of a crater in the middle of the moon, then finding it in your 9MM crosshair reticle while the ISS is rising behind you don't make for any kind of usable alignment. As it was the PC to Scope interface failed anyway so I tried to "free fly" with the scope control pad. First let me say as for the ISS, THAT BABY MOVES!! Without the computer to control it, the best I could hope to do is throw in a 40MM eyepiece, zip out ahead of it and get about a 1/2 second view as it streaked through the FOV (boy do I need that 10" Dob). My first observation was that of a very large airy disk with a dark spot right in the dead center. Wow, my scope is perfectly collimated! Racing ahead I spun the focus knob, wrong way! Ahead again and spinning the focus the other way, hey I see a slight elongation to the object, I think. Further away things slow way down and focusing on a small dot in the sky was easy. Oh well.... Not all was lost on the evening. I did get a chance to test out my new Lumicon O-III filter. I could actually make out the Swan Nebula even though a near full moon was sitting near by. Great filter! * (* As with any filter / eye combination, your results may vary :-) Jimmy Ray -----Original Message----- From: az-observing-bounce@xxxxxxxxxxxxx [mailto:az-observing-bounce@xxxxxxxxxxxxx]On Behalf Of Rick Tejera Sent: Friday, July 07, 2006 9:34 PM To: az-observing@xxxxxxxxxxxxx Subject: [AZ-Observing] Re: ISS/STS-121 pass over Phoenix tonight just before 9pm Jimmy, You can get the most current orbital elements from Heavens-Above. They update every three hours, I believe. Click on the link to the pass and from the visibility details page, click the "orbit' Link near the top right. This will display a plot of the orbit and will have the two line keplarian elements below the maps. Also has the elements in a tabular for as well. You should be able to copy & paste the TLE into whatever software you're using. Do it around 1900 tomorrow and you'll have the most accurate elements. I look forward to seeing your results Rick Tejera President Editor SACnews Saguaro Astronomy Club Phoenix, Arizona saguaroastro@xxxxxxx www.saguaroastro.org -- -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.9.10/383 - Release Date: 7/7/2006 -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.