Fwd: Re: A tad off topic....?

1999-03-12 Thread Mark Wrigley

Not quite true.
Last month Australia had a full moon at about 2am on Feb 1.
In Europe it was still January.


>From: Jim_Cobb <[EMAIL PROTECTED]>
>Reply-To: Jim Cobb <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>CC: sundial@rrz.uni-koeln.de
>Subject: Re: A tad off topic?
>Date: Fri, 12 Mar 1999 08:44:47 -0700
>
>The following are the years from 1800 to 2100 in which February has no
>full moon.  This is taken from Meeus's book.
>
>   180919152018
>   184719342037
>   186619612067
>   188519992094
>
>Jim
> --- -- 
>| Jim Cobb  | 540 Arapeen Dr. #100 | [EMAIL PROTECTED]  |
>| Parametric| Salt Lake City, UT   | (801)-588-4632 |
>|  Technology Corp. |   84108-1202 | Fax (801)-588-4650 |
> --- -- 
>All history is but a romance, unless it is studied as an example.
>   -- George Croly
>
>> Jean Meeus's book "Mathematical Astronomy Morsels"
>> 
>> 
http://www.amazon.com/exec/obidos/ASIN/0943396514/o/qid=921164695/sr=2-1/002-
>5697572-2293064
>> 
>> lists months over a period of about two hundred years which are
>> missing a lunar phase.  I believe it lists 1961 as the previous year
>> (before this one) without a February Full moon; it lists several
>> others.  I don't have this book handy right now.  I'll send more info
>> later...  If you have the book, it's in the chapter titled something
>> like "months with five lunar phases."  I believe it's the last 
chapter
>> of the first section of the book.
>> 
>> Jim
>

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Re: Fwd: Re: A tad off topic....?

1999-03-12 Thread Jim_Cobb

"Mark Wrigley" <[EMAIL PROTECTED]> wrote:
> Not quite true.
> Last month Australia had a full moon at about 2am on Feb 1.
> In Europe it was still January.

Quite so.  Meeus (careful calculator that he is) explicitly notes his
use of UT (and the dependence of such a calculation on the time zone).
The fault is mine for not propagating that bit of information.

Jim
 --- -- 
| Jim Cobb  | 540 Arapeen Dr. #100 | [EMAIL PROTECTED]  |
| Parametric| Salt Lake City, UT   | (801)-588-4632 |
|  Technology Corp. |   84108-1202 | Fax (801)-588-4650 |
 --- -- 
"Your weapons are no match for ours!  People of Mars, surrender!"
"Um, this isn't Mars. This is Earth." "Earth? Earth-with-nuclear-
weapons Earth?" "Yes." [long pause] "Friend!"   -- James Nicoll