Space Time
Also known as Elephant Trunk Nebula, Elephant's Trunk Nebula, IC 1396A.
One record per aspect. The origin says what kind of thing each value is; the source says where it came from; the limit says what it cannot tell you.
Elephant’s Trunk Nebula image-field center is placed at J2000 RA 21.6 h, Dec 57.5° in Cepheus, at an adopted distance of 2,450 light-years.
Elephant’s Trunk Nebula (star-forming emission nebula; central source Elephant’s Trunk Nebula, embedded stellar population): projected footprint at the adopted distance 21.6 × 21.4 light-years; outer radius used for arrival 10.8 light-years.
The observation covers IC 1396A and its immediate surroundings, not the whole IC 1396 complex. Emission-line and I-band exposures form the published palette. Projected structure follows the credited observation at its published angular scale and an approximate adopted distance. Shallow depth is illustrative, not measured tomography. The source palette is preserved; brightness is adjusted for the navigable view.