Cometary blackout in Leonard's Comet

 I have a hypothesis that I have been studying for years for these

cases, when a comet suffers a fading of the rate of increase in
brightness, and that is that the comet suffers a change in the

predominant volatile component CO -> H2O, this is usually typical in
the new comets coming from the Oort cloud, this slowdown in its
activity index, usually occurs in the heliocentric range of 1.5 <R
1.2, as is the case of comet C / 2021 A1 LEONARD, I do not think it
will increase much plus its brightness, since my last analysis
indicates an index n = 2.24, the term 2.5 n log R, represents the
change in brightness due to the variation of the heliocentric distance
of the comet, and the brightness varies by pure reflection n = 2, as a
solid object without gaseous activity, which I call the '' cometary
blackout '' .

Graphic adapted by COBS , Analysis J.P.Navarro .