What happened to John Locker? He used to contribute weekly to this email list. He used to photograph sun crossers all the time. His website seems to be gone also. I agree that you might want a filter that lets more light through but to get greater contrast between the satellite and the sun all you have to do is use a slower exposure. That way the sun will be whiter and the satellite will still be black. However this might blur the image. Also a hydrogen alpha I assume shows more detail/interesting patterns on the surface of the sun which might tend to slightly camouflage something crossing the sun. - George Roberts http://gr5.org ----- Original Message ----- From: "Thomas Ashcraft" <ashcraft@heliotown.com> To: <SeeSat-L@satobs.org> Sent: Tuesday, April 06, 2010 10:10 AM Subject: Any images/movies of sun crossers? ( Other than ISS-shuttle) >I have been attempting to observe sun crossers using video and have not > had much luck so far. I think this is due to the type of telescope I am > using which is filtered for hydrogen-alpha which makes a grayish colored > solar disk. I think I need a white light filter for better contrast. In > any case, I am recording the sun full time so I can keep trying to > capture these particular sat passes. > > In the meantime I cannot find any sun crosser observations other than > ISS or shuttle images. Can anyone point to references on sun crossers > and are there images or movies anywhere? > > Thank you in advance. > > Thomas > > Thomas Ashcraft > New Mexico > _______________________________________________ > Seesat-l mailing list > http://mailman.satobs.org/mailman/listinfo/seesat-l > _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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