Gerhard, and how do I know what the course of the groundpath is and when a transit occurs close to my home? Rainer >I've used a 3 inch Apo-refractor with an ND5 glass sun filter, just what I >normally use for sun observations. We also had a 5 inch refractor and two 8 >inch SCTs (one was used for the camera) with ND5 sun screen foil for visual >observations and ND4 foil for the camera (to allow higher speed). The ISS is >so small that you do need a telescope to observe the transit. Solar eclipse >glasses or so won't do. The magnification I use for such observations depends >on the elevation of the sun at the time. With a very high sun the transit is >short (e.g. 0.5 sec) in which case my eyes find it easier to see something >with a 40x magnification. If the transit is slower (which happens at lower >sun elevations) I use higher powers. But this is something very individual to >each observer I guess. > > >>I'd sure like to try to see a solar transit of the station sometime. I saw >>the venus transit and it was really wicked. > >Solar transits of the ISS are quite frequent. If you don't mind travelling >some 30 miles or so you should expect 2 or 3 transits a month at your >latitude of 41.7°. If you live close to 50° latitude as I do you seem to get >them even more often (at least during the summer). Two years ago I was able >to observe 4 transits within one month without even leaving the house! > >Clear skies (day and night) > >Gerhard HOLTKAMP >Darmstadt, Germany > > >------------------------------------------------------------------------- >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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