2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/220481We present the analysis of an unpublished VLA archive observation made at 1.49 GHz in 1989 toward the supernova remnant G1.9+0.3, the youngest such Galactic object known. This observation agrees with the time evolution in angular size previously reported. We derive an expansion rate of 0.46 +- 0.11 % per year and an age of 220+45-70 yr for the remnant by comparing the 1985 and 1989 images.5 pages, 2 figuresAstrophysics of GalaxiesHigh Energy Astrophysical Phenomenatext