What goes around, comes around?

[cshahar]

Hi Everyone:

I was intrigued to hear from spaceweather.com that in about 11 days the active regions that graced us last week may be coming around the limb for another pass. I thought to myself, that would be a good time to take a work vacation! I would imagine that some of the major spots survive the far side of the sun, and re-incarnate. I know that they are then given new AR numbers. Does anyone have any more information about this phenomenon?

-Charles

[David Smith]

Some of the groups will hang on that long and come back for a second pass. It tends to be only the largest and most active groups and in my experience they tend to be a shadow of their former selves by the time they come back. 2565/7 was a nice group but I would (personally) be surprised if it makes it back in a form that is more than just a couple of dying spots.

I occasionally look at this site to track big spots around the farside but admit that I am not entirely convinced of the reliability of the information.

https://www.raben.com/maps

[cshahar]

Thanks Dave. Very useful site! I didn't know that such a site existed, but as you say, a lot can happen as the spot traverses the opposite side.

-Charles

[Pete Presland]

It will be interesting to see if they make it.

[paulastro]

It's not unknown for spot groups to come round for a third appearance on occasion Charles.   I think one earlier this year did exactly that - unless it was the end of last year .

[cshahar]

Really Paul! That's encouraging. I don't mind left-overs. Better than a blank sun.

-Charles