I think my Eddington Number might be slightly higher than I thought. It's the number of miles ridden in a 24-hour period, as I understand it.

I have found a few days which seem to have slipped through the net because I've gone out on one bike and ridden 60+ miles and then later gone out on the tandem and ridden another 10 or more. Different rides, same day, total over 70 miles. I shall spend a bit of time sorting that out I think.

Like all good numbers it invites some debate over definitions. I've worked on the view that events like Paris-Brest-Paris are single rides, even if they take multiple days, because the event is based on a single time limit. This would be different from, lets say (as I haven't done it) Lands End to John O'Groats which I would do as a series of daily rides. Where I've been out on a club run and then, as an afterthought, gone out with my sons for a leisure ride I've seen this as two rides, whereas a daily commute I see as one.

If I used the definition in the quote above then my Eddington number would go up as Audax events such as LEL, PBP and the Mille Miglia would become 3 100+ mile rides or even 4, and quite a few of the 600km events I have done would have had 100+ miles in two consecutive 24 hour periods. It would be difficult to do the calculations as I only record the total distance for the event not the point at which I got to after 24 hours. A guess would be that it would move from 101 to about 110.

However, will stick with the way I've calculated and appreciate the beauty of its mathematical uncertainty. I hope that Arthur Eddington would approve.