[time-nuts] telling time without a clock

aartmolsen at comcast.net aartmolsen at comcast.net
Sat Jan 28 11:46:10 EST 2012

The star catalog specifically designed for lunar occultations is the XZ (I'm guessing it stands for eXtended Zodiacal) Catalog from the US Naval Observatory. It's based on the earlier ZC and covers the band of brighter stars that can be occulted by the moon. Simbad should have these catalogs. 

Aart Olsen 

----- Original Message -----
From: "Chris Albertson" <albertson.chris at gmail.com> 
To: jfor at quikus.com, "Discussion of precise time and frequency measurement" <time-nuts at febo.com> 
Sent: Thursday, January 26, 2012 10:42:00 PM 
Subject: Re: [time-nuts] telling time without a clock 

"simbad" is a catalog of catalogs with a built in web based search 
engine. It is pretty much what "everyone" uses to search. You can 
define a shape and ask for all objects that meet some criteria that 
are within that shape. Other software can plot the result for you as 
a chart If it is not in Simbad you have likely discovered something 


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