[time-nuts] Sidereal time

[J. Forster]

Wait 'till EXACTLY the Spring Equinox?

-John

==================

> Brian Kirby wrote:
>> I would like to have an electronic clock to keep sidereal time.  I am
>> planning on using a HP 59309A, which can except an external clock of
>> 1/5/10 Mhz.
>>
>> According to Wikipedia sidereal time is 23 hours 56 minutes and 4.091
>> seconds - a total of 86,164.091 seconds
>>
>> So 86,400 seconds for a normal "atomic defined" day divided by
>> 86,164.091 = 1.002,737,903,89
>>
>> If I set the 59309A to 10 Mhz external clock and dial a synthesizer up
>> to 10.0273790, the unit should be able to keep sidereal time.
>>
>> Is my math and theory correct ?
>>
>> Brian - KD4FM
>>
> That just gives the rate.
> How are you going to set the actual Sidereal time to better than the
> 0.9s that can be deduced from UTC?
>
> Bruce
>
>
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