I'd be interested to know what the relationship is between the elevation of the pass and the sun separation and angle for true daylight passes. My own studies involve telescopic viewing , the latest attempt was with the sun down to 17 degs above the horizon and whilst the station was easy to spot on the recording , it was not visible , either naked eye or through the 8 x 50 viewfinder. http://mysite.wanadoo-members.co.uk/satcom_transits/daylight.html Unfortunately the best elevation I can expect is 61 degs. I suspect that with passes of 70 degs or higher there's a much better chance of seeing something naked eye shortly before sunset. Whether ISS will ever become a true naked eye ( ie seen in clear sky conditions at any time of day ) object I'm still not sure. John ----- Original Message ----- From: <Skywayinc@aol.com> To: <seesat-l@satobs.org> Sent: Tuesday, June 10, 2008 1:44 AM Subject: ISS in daylight!!! > > Just saw the ISS from Yonkers, just outside of our News 12 studios just > prior to sunset, as an E-mail alert I had sent out to several indivials > and two > local (NY) astronomy clubs on Sunday night. Have also received > confirmation > of sightings from two other observers (see below). > > I didn't see it until it passed almost overhead . . . then saw it ramp-up > in > brightness to perhaps magnitude -6 or brighter against the hazy/steely > blue > sky. Also used 7 X 35 binoculars. > > So yes . . . you CAN see the ISS in the daytime!!! > > -- joe r. > > ---------------------------------------------------------- > I saw it from Katonah, NY, picking it with the naked eye when it flared > (-6? > -7?) shortly after it passed overhead. I watch lots of ISS passes, and > this > is the best flare I've seen. Are they becoming more common? > > Thanks!!! > Brian Summers > > ---------------------------------------------------- > > Dear Joe, > > From my home in Lindenhurst, using my eyes alone, I looked carefully from > 8:17 PM, and finally acquired the ISS at 8:21:10 PM EDT (checked with > watch > checked with WWV) and watched it drift slowly in a hazy but cloudless blue > sky. > The object brightened gradually, almost flaring at 8:21:21. It then > dimmed > and I was able to hold it visually until I lost it at 8:22:17. > > (Incidentally, checking the positions against Starry Night with daylight > turned off helped greatly in predicting where to look- you had gotten the > directions wrong in your e-mail, but the altitudes and azimuths were > right.) > > Sam Storch > > > > > > **************Vote for your city's best dining and nightlife. City's Best > 2008. (http://citysbest.aol.com?ncid=aolacg00050000000102) > > ------------------------------------------------------------------------- > Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: > http://www.satobs.org/seesat/seesatindex.html > > > ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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