NavList:

Antoine, you wrote:
"I suggest that we should wait for Frank's view-point here, since this subject also seems to have caught the attention of at least one other Gentleman of our NavList Member. And if it turns out that the "audience" is really too small on this topic, it can be covered through personal e-mails. Not a problem from my end."

I don't really have anything more to add here. If it intrigues you to try the approach I suggested, then please do and let's hear how it works out. I would be interested to see if you can beat my 111 bytes per day (Sun, Moon, 4 nav planets, for one arcsecond accuracy using plain linear interpolation).

For Peter, as a word of advice, integers are your friend. ;)

-FER

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