Does anyone recognize this precession matrix?

[solarblast]

Anyone know who was the originator of the matrix in the jpg file?

 

[lpetrich]

That looks like something out of http://www.uscibooks.com/seid.htm -- I remember seeing similar-looking formulas in it long ago.

In any case, that looks like it'll only be good for a few centuries around our time.

 

[solarblast]

Thanks. The book costs about $75, but it's possible that I might get an inter library loan from some university here in Calif.

I think the modern method is based on a 1976 paper by Lieske, et al. Expressions for Precession Quantities.

 

[lpetrich]

You'll likely find a copy at some well-stocked university library. I once found a copy at the UC Berkeley campus library. You can search the UC catalog online at http://melvyl.worldcat.org/ I did so, and indeed it was there. You may also be able to search other university libraries from your home.

 

[pmacias]

I would suggest conducting further research on the precession matrix in question. It may be helpful to consult academic databases and publications to see if this matrix has been previously studied or discussed. Additionally, reaching out to experts in the field of precession and rotational dynamics may provide valuable insights into the origin and significance of this matrix. It is important to properly credit the originator of any scientific concept or tool, so it is worth investigating further to determine the source of this matrix.