Robert Matson wrote: > Just wanted to chime in that Tom is absolutely right Hi Robert- I entered the following transit location into CalSKY: A - seconds elapsed since "Contact 1," at 5:13:29 UTC B - UTC time (June 8) C - elevation angle of the ISS/Venus D - azimuth angle of the ISS ( + is East from North; - is W from N) E - range (miles) F - latitude for observing the transit G - longitude H - sun elevation angle I - sun/Venus separation angle A---- B------- C--- D----- E--- F------- G-------- H---- I---- 7762 7:22:51 0.9 -64.5 1319 27.5991 171.1298 0.5 0.2 which appears to give an "unrefracted" answer back, showing the ISS passing about 2' of arc above Venus: Tuesday 8 June 2004 Observer SiteUser Site WGS84: Lon: +171d07m47.3s Lat: +27d35m56.8s Alt: -6m 7h22m50.97sISSMay cross the disk of Venus. Separation: 0.03d Position Angle: 117.9d Angular Velocity: 6.5'/s Angular diameter: 8.7" size: 73.0m x 44.5m x 27.5m Satellite at az: 295.5d WNW h: 1.0d dist: 2122.7 km mag=13.1m -5.7 I hope someday to capture a transit of the ISS across a rising/setting Sun or Moon- though at that distance & seeing, the ISS is likely only to be a small, indistinct blob- otherwise, the effect of atmospheric ray-bending is just a small technical point ;-) ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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