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After the early observations of the disrupted asteroid P/2016 G1 with the10.4m Gran Telescopio Canarias (GTC), and the modeling of the dust ejecta, wehave performed a follow-up observational campaign of this object using theHubble Space Telescope (HST) during two epochs (June 28 and July 11, 2016). Theanalysis of these HST images with the same model inputs obtained from the GTCimages revealed a good consistency with the predicted evolution from the GTCimages, so that the model is applicable to the whole observational period fromlate April to early July 2016. This result confirms that the resulting dustejecta was caused by a relatively short-duration event with onset about 350days before perihelion, and spanning about 30 days (HWHM). For a sizedistribution of particles with a geometric albedo of 0.15, having radii limitsof 1 $\mu$m and 1 cm, and following a power-law with index --3.0, the totaldust mass ejected is $\sim$2$\times$10$^7$ kg. As was the case with the GTCobservations, no condensations in the images that could be attributed to anucleus or fragments released after the disruption event were found. However,the higher limiting magnitude reachable with the HST images in comparison withthose from GTC allowed us to impose a more stringent upper limit to theobserved fragments of $\sim$30 m.

Disrupted asteroid P/2016 G1. II. Follow-up observations from the Hubble Space Telescope