Nice "blue sky " Lunar transit by ISS last night although slightly spoiled by thin high cloud. It took place at 1931 gmt . For me this was a test run to see how accurately I could position for future transits. Having first surveyed an appropriate site and taken GPS readings , the actual track results were spot on when compared to CalSky.com predictions. ( Have found in the past that taking references off mapping sw can result in discrepancies of between 50 and 100 metres) ISS arrived about a second early. Laptop had been synchronised to GPS shortly before the run. http://mysite.wanadoo-members.co.uk/satcom_transits/issraw.gif 1.5 mb or http://mysite.wanadoo-members.co.uk/satcom_transits/ISS_transit.wmv 100kb John Calsky.com data 20h31m11.70s ISS Crosses the disk of Moon. Separation: 0.016d Position Angle: 66.0d Angular Velocity: 50.3'/s. Transit duration: 0.59s Angular diameter: 41.2" size: 73.0m x 44.5m x 27.5m Satellite at az: 230.9d SW h: 51.2d dist: 450.0 km mag=-0.9m Satellite apparently moves to direction 332.9° Path direction: 89.5d E ground speed: 7.566 km/s width: 4.1 km max. duration: 0.6 s ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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