Last night (July 14/15) was clear here in Chelmsford. This asteroid is now 12 million km away and is around 19.3 at its brightest. It varied quite a bit over my 20x60s subs and, at its faintest is probably mag 20 or so.
https://britastro.org/observations/observation.php?id=20240715_211942_4a7a99b2a55cc815