The d5000 is a 12.3-megapixel dx-format dslr nikon f-mount camera, announced by nikon on 14 april 2009. the d5000 has many features in common with the d90. wikipedia
megapixels: 12.3
lens: interchangeable, nikon f-mount
battery: nikon en-el9a lithium-ion battery
flash: built in pop-up, guide number 13m at iso 100, standard iso hotshoe, compatible with the nikon creative lighting system
sensor: 23.6 × 15.8 mm nikon dx format rgb cmos sensor, 1.5 × fov crop
shutter: electronically controlled vertical-travel focal-plane shutter
video recording: 720p @ 24 frames/sec (full 24p film mode)