[3] The observed radius of the remnant shell translates to approximately 4,500 years of expansion,[4] making it one of the oldest observed Type Ia supernova remnants.

[5] G299.2-2.9 gives astronomers an opportunity to study how supernova remnants evolve and warp over time.

G299.2-2.9 is split into several distinct and different regions: an almost complete bubble interrupted only by a blow-out, a bright center, a complex "knot" region on the northeastern edge of the bubble structure and a diffuse emission extending beyond the main structure.

[8] The small X-ray emission from the deep portions of G299.2-2.9 shows large quantities of iron and silicon,[9] which indicates that it is a remnant of a Type Ia supernova.

[10] Since theories about Type Ia supernovae assume they go off in a specified environment, detailed studies of the outer "shell" of G299.2-2.9 have helped astronomers[11] improve their understanding of the areas and situations where thermonuclear explosions occur.