Recently, I have had the desire to flesh out some of the New Federation Starfleet designs from my "Star Trek: United We Stand"
fanfic. This is the first of the ships I've decided to work on - the Sedna-Class starship. This is just my first pass at the top profile, establishing the general shape and general placement of major details on the hull. She's a small border patrol scout, roughly the same size as a Springfield-Class starship.
The NCC number with the letter prefix is not an error... it is very much intentional, and there is a reason for it. All New Federation ships have an "A" prefix preceding the numeral, indicating that it belongs to the Andromedan, or "New" Federation.
As you can see, the Sedna is a very small vessel. I'm still working out the window and lifeboat placement for the upper saucer. The upper "hood" containing the bridge module and leading to the downswept warp pylons also acts as the "roof" to the secondary hull, which is tucked underneath it. You can see the shuttlebay poking out from below it at the rear. I am thinking most likely she won't have a full deflector dish, like on large starships, but will rather have the smaller lower saucer deflector array, like that on the saucer section of the Galaxy and Nebula-Class ships.