NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Lat and Long by moon transit.
From: Jeremy C
Date: 2011 Jan 28, 19:42 -0500
From: Jeremy C
Date: 2011 Jan 28, 19:42 -0500
Sorry about the confusion.
From my logbook, it says the LT is 19h00m on 30 June 2009. The GMT
was 10h00m on 30 June as we were keeping ZD -9.
Jeremy
In a message dated 1/29/2011 6:28:56 A.M. Central Asia Standard Time,
hhew36@gmail.com writes:
Jeremy -
I'm a little confused with the data. Is the Greenwich date 6-30-2009 or 6-29-2009?
The reason I'm asking is you refer to the moon's declination as "7 degrees south and increasing by about 14 minutes/hour." That's what the moon is doing on 6-29. But if you use that date, you end up with a GHA of around 241°. But if you're at longitude 130°, the GHA should be around 230°.
Looking at a Greenwich date of 6-30-2009 makes more sense. Here, the 0900 GHA is 217°, so adding another 50+ minutes looks to put you near a GHA of 230°.
Looking at Kermit's results, I'd say he used the 6-30-2009 date.
Hewitt
