Large eruptive prom 22nd Sept

"it must have been dramatic in the eyepiece also"
Dave, u mean that after spending all that money on this solar observing telescope u might not be able to see this through the eyepiece
Nice picture all the same Trev

Not exactly, but I've often taken images of the planets where they show more detail then is visible through the eyepiece, good processing can bring out alot of detail.

That's a fabulous imge Trevor, you're onto a winner with that one - but I'd remove the 'Earth' comparison before submitting it to places, as it is unknown how accurate your representation is!

:oops:

It would be easy enough to get reasonably accurate Seanie.

When I did this before, I used Photoshop. I selected the brush tool and changed the diameter until it exactly matched that of the Sun's diameter on the image. Then, I divided the brush diameter by 110 and voila, you're got Earth.

Now, who said it took 6 days to create Earth...


Clear Skies,

Geez Michael, I didn't think of that method! I tried to calculate it.

With the NexImage on the PST + 2x barlow it's 1.44 arcsec/pixel.

Using 30 arc minutes for the average solar width from Earth and the fact that the Earth has a 1/110 diameter of the Sun, giving 3/11 arcmin which gave me 16 arcsecs as the target size to aim for.

So then it's 16/1.44 giving 11.36 pixels to scale.

Yikes, I used 24 because I multiplied by 1.44 instead of dividing!!!! Should have been 11.

Thanks for pointing it out Seanie. I would have just left it at this size.

The reworked image below.



BTW Spaceweather posted a link to it yesterday

Cheers,

Trev

BTW Spaceweather posted a link to it yesterday

Sweet!