Obs SatTrackCam Leiden (Cospar 4353), 28 Mar 2006: 24680 96 072A 4353 G 20060328203031100 17 75 1135096+530520 56 S+025 10 24680 96 072A 4353 G 20060328203041800 17 75 1144060+594490 56 S+025 10 ------------------------------------------------------------------------- Method: Canon Digital Ixus 400 + ASTRORECORD astrometric software. Camera at manual mode, "10 second" (= 10.7 second) exposure, wide field f2.8/7.41 mm. What these numbers mean: http://www.satellite.eu.org/position/IODformat.html These two points are almost exactly on time (both delta T -0.06s) with regard to Mike's elset 06085.80344161. The Xtrack devation is however 0.17 resp 0.19 degrees (a factor 10 larger than usual, usual is 0.01 to 0.03). ** I believe this is a real deviation value, not a measurement inaccuracy **. The trail on the image was not very bright, but crisp. The picture that yielded these two points was obtained amidst flying cloud cover: the one moment the sky was clear, 2 minutes later covered, then clear again etc..... The Big Dipper cleared only a minute before USA 129 would cross it! A minute after the passage it was clouded over again...! Only part of the resulting photographic image was not clouded, but that part yielded well enough stars for a good astrometric solution (I measured 100 stars). So, a lucky shot! Could see the satellite by the naked eye easily at about mag. +2.5 "Full" image (screenshot from ASTRORECORD in full image mode, green dots are measured stars, blue dots measured start and end of trail. Resolution reduced to make bitesize acceptable) here: http://i19.photobucket.com/albums/b176/marcoaliaslama/satellites/24680_fl.jpg Detail showing trail crossing big dipper: http://i19.photobucket.com/albums/b176/marcoaliaslama/satellites/24680_dt.jpg - Marco :-) ----- Dr Marco Langbroek - SatTrackCam Leiden, Cospar 4353 Leiden, the Netherlands. 52.15412 N, 4.49081 E (WS84), +0 m ASL SatTrackCam: http://home.wanadoo.nl/marco.langbroek/satcam.html Station (b)log: http://sattrackcam.blogspot.com Atom RSS: http://sattrackcam.blogspot.com/atom.xml e-mail: sattrackcam@wanadoo.nl ----- ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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