[AZ-Observing] Re: Precession
- From: "Henry De Jonge IV" <hdejonge@xxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Sat, 16 Aug 2014 16:38:37 -0700
Howard,
Don't feel bad I have a hard time keeping score, (simple addition) with
card games! Better to have the ideas and understanding on the right track
most often I believe.
Regards,
Henry De Jonge IV
Office: 480-926-1000
Cell: 602-206-1752
Email: hdejonge@xxxxxxx
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Howard Anderson
Sent: Saturday, August 16, 2014 1:44 PM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: Precession
Thanks Brian,
Similar message received from Bob Aeyrs...
I am feeling pretty dumb. All the hard stuff I got right but I screwed up
the input. :-)
Thanks,
Howard
Brian Skiff wrote:
>On Sat, 2014-08-16 at 13:24 -0700, Howard Anderson wrote:
>
>
>
>>Since precession of the Earth has a period of about 60,000 years, I
>>thought for a final check I should put in RA and Dec and precess with
>>a value of 62,000 years.
>>
>>Since I am a mathematician with a strong physics background, I
>>expected to get new coordinates similar to the old ones.
>>
>>Shockingly they are WAY off.
>>
>>
>>
>
>Maybe because the precessional cycle is about 26,000 years, rather than
>60,000 years?
>
>http://en.wikipedia.org/wiki/Axial_precession
>
>
>\Brian
>
>
>--
>See message header for info on list archives or unsubscribing, and
>please send personal replies to the author, not the list.
>
>
>
>
>
--
See message header for info on list archives or unsubscribing, and please
send personal replies to the author, not the list.
--
See message header for info on list archives or unsubscribing, and please
send personal replies to the author, not the list.
Other related posts:
