NavList:

   

Reply

OK, I've now determined that this latitude error can't be due to the
wabble of polaris, because it is an orders of magnitude too large (the
monthly table provides this correction based on the relative movement
of the earth around the sun).

It still leaves me perplexed. At LHA Aries of 120-129 it is 0.2' (at
0deg lat) and 1.0' at (68deg latt) whilst with aries at 230-239, it is
unvarying at 0.6'.

Oh ***k! -and how stupid of me! Finally got it - the latitude
correction on the polaris table is the same latitude correction as is
needed for any other star but because polaris' wobble is only 1deg
this correction can fit on a table a lot lot lot smaller than any
other star!

Mike

On Nov 21, 10:34 am, Isonomia  wrote:
> I was looking at the navigation table for Polaris table and couldn't
> work out what the correction of up to 1' with latitude (and LHA) on
> the polaris table represented.
>
> It seems to be constant at one LHA going to a maximum at 180degrees
> and therefore the only only thing I can imagine it would be is a
> correction for the none infinite distant from earth to the star - is
> this right?
>
> If so, do other stars have similar correction tables which I've
> missed?
>
> Mike
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---

   

Reply