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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Catching Parallactic Retardation
From: Bruce Stark
Date: 2002 Mar 28, 13:58 EST
From: Bruce Stark
Date: 2002 Mar 28, 13:58 EST
Here's the data from three sets of Pollux and near limb taken last Monday night: Actual POSITION: 44� 0.'9 N, 123� 4.'1 W. WATCH: 5 seconds slow on zone time, 7:59:55 fast on GMT. INDEX: 0.'2 off the arc. FIRST SET (after junking the first contact). Times are PM, 5 seconds fast on Z+8. I'll include hours and degrees all the way in the hope it will keep columns strait. 8:43:08 35� 33.'2 8:44:40 35� 33.'6 8:45:51 35� 33.'6 8:46:37 35� 34.'3 8:47:30 35� 34.'1 8:45:33 35� 33.'8 Average for first set. SECOND SET: 8:59:25 35 39.6 9:00:32 35 41.3 9:01:43 35 40.8 9;02:51 35 41.3 9:03:32 35 42.9 9:01:37 35� 41.'2 Average for second set. THIRD SET: 10:06:09 36 11.2 10:07:28 36 11.6 10:09:14 36 11.3 10:10:12 36 12.4 10:11:24 36 14.0 10:08:53 36� 12.'1 Average for third set. CLEARED DISTANCES: First set: 35� 24.'4 Second set: 35� 34.'3 Third set: 36� 16.'4 COMPARING DISTANCES: GMT March 26, '02 04 hours: 34� 56.'4 05 hours: 35� 33.'5 06 hours: 36� 10.'5 07 hours: 36� 47.'5 Fellow lunarians (lunatics?) can ask for any other information they want, though I may not be able to get back to them as soon as I'd like. Bruce