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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: FW: A noon sight conundrum
From: Paul Hirose
Date: 2003 Nov 25, 14:27 -0800
From: Paul Hirose
Date: 2003 Nov 25, 14:27 -0800
I wrote: > > I'm not sure what effect the incorrect delta T has on the meridian > passage computation. There's no significant effect. By switching the MICA time scale to TT and applying the actual offset between TT and UT1 on the date of Kieran's observation, I got these values for zenith distance and azimuth: 2002 Jul 20 03:16:43.4 42 30 54.3 0 00 02.6 2002 Jul 20 03:16:44.4 42 30 54.3 359 59 41.9 Those times correspond to the UT1 times that I previously posted: 2002 Jul 20 03:15:39.0 42 30 54.3 0 00 02.3 2002 Jul 20 03:15:40.0 42 30 54.3 359 59 41.6 So it looks like meridian passage occurred at 03:15:39 UT1, which agrees with what Kieran estimated.
