200717 - Neowise over Emerald Bay

click image to enlarge

ASTRO:
     type=comet
     mag=(3.0-4.6);
     distance=(at closest encounter to Earth) 64 M mi;
     size=5 mi. diameter (est.)
IMAGE:
     location=EB backyard boatdock;
     exposure=DSLR OSC: 1x120s (2m), f/5.6, ISO400
EQUIPMENT:
     camera=Nikon D90 (stk);
     optics=NIKKOR 55-200mm DX kit zoom @ 200mm;
     filter=(none);
     mount=simple fixed tripod
SOFTWARE:
     acquisition=(in-camera)
     processing=PhotoshopCC

Note that the Neowise comet and stars in this image are sharply in-focus; but, the landscape (houses, trees and water) are not.  This is the result of the image being captured with the camera mounted to a star tracker mount which compensates for the apparent motion of the sky as the Earth rotates underneath it.  This 120s (2m) long exposure, was taken with a DSLR camera, and thanks to the tracker, was synchronized to the apparent motion of the sky; not to the fixed landscape.