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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Lunars
From: Mike Hannibal
Date: 2005 Dec 5, 21:43 +1100
From: Mike Hannibal
Date: 2005 Dec 5, 21:43 +1100
This evening walking back from the supermarket I noticed a fine opportunity for some lunars - the crescent moon close to Venus in the western sky at around 25 to 30 degrees altitude. I rushed up to "the bridge" - the deck outside our bedroom - and took a series of 8 lunars. The first in the series appeared out of range and was discarded. I cleared the remainder with Frank's calculator. The results were: Site # Error in Lunar Error in Lon 2 0 min -0.8 min 3 -0.4 min -11.6 min 4 -1.3 min -37.5 min 5 -0.2 min -7.3 min 6 -0.1 min -2.0 min 7 0 min -0.3 min 8 -0.7 min -22.6 min From this I deduce a number of things. Firstly if my interpretation is correct I have a consistent tendency to not quite bring the bodies into tangency. This would be borne out by my sense that I had to try to bring things closer and that the bright "penumbra" for lack of a better word - around the moon caused me to prematurely assume tangency. Secondly I am horribly inconsistent. Does anyone have suggestions about judging tangency? Any other suggestions - other than practise - to improve matters. Out of interest HE was 14 feet, temperature 70 degrees F and IE was 0.7 min on. Ds varied from 7d 58.7m to 8d 2.0m. Regards Mike ____________________________________________________ Do you Yahoo!? Find a local business fast with Yahoo! Local Search http://au.local.yahoo.com
