Is that synodic or sidereal lustra?

Jack

Bill Colville wrote:

> >   I'd make a wild uninformed guess that the average age is in the
> >   thirties or forties somewhere, but there is an enormous range.
> >
> >   I turned (2^6)-1 last Christmas day and I'm certainly not
> >   the oldest one.
> >
> >   The Other Reggie

> I was going to keep my mouth shut, but I am 14.2 lustrum old and
> have had the Amateur call W3NMK since 1947.

> Cheers,   Bill