This comet has probably been in this sunlit orbit for many thousands of years, and now, instead of having a continuous outflow like Hale Bobb of similar size, it has become much less active.

Yesterday Spaceweather referred to the article by Tony Phillips as Cryovolcanism, and the article referenced back to images on Spaceweather. Both Spaceweather and the article referred back to Richard Miles hypothesis.

https://spaceweather.com/archive.php?view=1&day=16&month=02&year=2026

I don't use circular arguments, I observe the expansion speed to determine if it is unusually high.

In this case, the possible date of outburst was on 9. February 2026.
My picture was on 15. February and the expanding dust-coma has a diameter of approximately 27".
Which gives an expansion speed of ca. 0.10 km/sec. Very close to Halleys comet at the same distance from the sun. Which is a good indication that it is similar processes going on, on both comets.

Method of calculation is described in the link below from February 14, 2025.

Halley's comet was 0.11 km/sec. ( At approximately 5.5 au ).
We know approximately how comets expansion speed are as a function of solar distances, and in the outer solarsystem , observed Cryovolcanisms deviate considerable.

The chemical compositions mentioned in Tony Phillips article are common in most comets, and there was no mentioning of the sun's effects from longtime exposures.
( The plot in the article show a magnitude curve instead of ejection speeds. )

Chemical components are here :
https://en.wikipedia.org/wiki/Halley%27s_Comet

Sun distance (au): 6.309 Perihel 28.March 2019 Sun dist.(au): 5,77

Time: 00:02UT 2026-02-15 Exp. 150 X 30sec
Tel: 0.254m f/5.8 ST-10XME CCD @ -25°C 0.95"/pix
Odd Trondal Obs.code 238 (Uranium). Oslo Norway.