V488 Persei

The star AP 70, later called V488 Persei was found to be variable with a period of 123.5 hours.

[4] The star is a BY Draconis variable, which shows periodic variations due to starspots.

The researchers suspect that two planetary embroys collided with each other at distances similar to transiting rocky exoplanets, known at the time.

This work found that one major event occurred in 2019, leading to an increase of infrared brightness.

The same work suggests that the objects in an asteroid-like belt at 0.3 AU are perturbed by a giant planet or brown dwarf.

This results in a high level of collisions between planetesimals and the dust will be dragged towards the star due to the stellar wind.

NEOWISE single exposure (gray crosses) and unTimely (black circles) light curves of the W1 filter of WISE. The Spitzer ch1 filter measurements from Rieke et al. [ 1 ] are shown in orange. The 2019 event is clearly visible as a jump in brightness (between MJD 58500–58700) and the star shows constant fading since the event.