(6478) Gault – Astéroid with cometary activity


(6478 Gault) is an asteroid that is part of the main asteroid belt orbiting between the orbits of Mars and Jupiter. In January 2019, cometary activity was detected around its core probably due to gradual decay of the object.

I took a picture of it on April 1 of the same year in a sky that was unfortunately not very transparent. Her is an animation of 2 photos of it showing its movement between the two exposures and highlighting the tail of dust that makes it look like a comet.

Technical details:

Telescope: Celestron Edge HD14 and 0,7x focal reducer
Mount: Paramount MX+
Camera: ZWO ASI 1600 in bin 2×2 mode
Filter ZWO luminance 1.25″
Exposure: 2 x 10 minutes with tracking on the asteroid
Place: Backyard observatory in Sainte-Sophie, Qc
Date: April 1st 2019