[AZ-Observing] Re: 486 488 501

You're correct. After reading your message I went back and checked 
AstroAlert. It escaped my memory, or it did not sink home the first time 
I read it, but it said (in parenthesis) that 501 was formerly known as 
484 last month.
Stan


Steven Dodder wrote:

>As I understand it, every spot that appears over the limb is assigned a 
>number.  In this case, 501.  Since we can now monitor the sunspots as they 
>traverse the back side, we are then able to detect if this spot has made the 
>trip before, in this case 501=484.  This morning, when I did my sketch, I 
>did see the next spot group clearly on the limb, though much foreshortened.  
>It seems likely this spot group is the former 488, since that was the next 
>strongest group on the last rotation.  The "discrepancy" is, and it is not, 
>depending on how you look at it, but I'd lean toward the new number, given 
>when the system was developed we couldn't watch spots traverse the backside, 
>so it was anybody's guess if the spot had made it all the way around.  My 2 
>cents.
>  
>
>  
>

--
See message header for info on list archives or unsubscribing, and please 
send personal replies to the author, not the list.

Other related posts: