Comet C / 2021 A1 Leonard shows at the moment with 272 ccd observations a linear fit in its light curve, the provisional photometric parameters are m0 = + 10. and n = 3.1, this low activity rate shows little gas and dust activity at the nuclear level behaving almost like a solid nucleus with almost no sublimation activity, based on the formula of Sosa & Fdez 2011, the water production rate is 10 ^ 26.42 mol s, I am inclined to think that it is much smaller, like the active fraction area for the nucleus, interpolating data I have taken a value of 0.5 but perhaps it is lower.
Regarding the future brightness trend, green color adjustment, it is observed that the maximum magnitude could be around m1 ~ + 6.0, but these data are CCD, so the apparent or visual magnitude could be much brighter in Based on other analyzed light curves, cautious for now, and wait for the visual observations that will be the ones that will give us more clues in future months of its true maximum brightness.
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