smallest fov that ASTAP solved

[David Pearson]

what is the smallest fov that ASTAP has solved using D80 database?
what were the exposure details and system configuration used.
would like to push to limit
thanks
dave

[han.k]

Hi David,

With about 30 stars it will solve reliable. The D80 has a density of 8000 stars/square degree so it can go down to 30/8000= 0.00375 square degrees so 0.06 x0.06 degrees area. So theoretical about 4x4 arcminutes.

But you have to exposure longer to get these stars. And if they are not there then it can't solve. The magnitude limit is about 21. That will be difficult to reach.

You can test it your self. Take a star rich image and crop it in ASTAP and then try to solve it again.

[David Pearson]

thanks ... didn't think to do take existing image and crop to test.
dave