NGC 1003 is a spiral galaxy at the western edge of the Perseus constellation.

[9] It is located at a distance of about 36 million light years from the Milky Way and is receding with a heliocentric radial velocity of 624 km/s.

[4] This galaxy was discovered by the Anglo-German astronomer William Herschel on October 6, 1784, who described it as "pretty faint, large, extended 90°±, much brighter middle, mottled but not resolved".

The visual disk of the galaxy shows a substantial warping in the eastern side, turning it almost face on.

[8] One supernova has been observed in NGC 1003: SN 1937D (type Ia, mag.