lunes, 6 de septiembre de 2021

Update Analysis Light Curve C/2021 A1 LEONARD A1

 My second analysis of the light curve of comet C / 2021 A1 LEONARD, indicates in T-300, a stagnation in the rate of increase in brightness or activity index with a brightness law similar to that of a solid object without gaseous activity. of R ^ (- 1.4), following this same brightness law, its maximum visual magnitude at perihelion could reach m1 = +9.5, in the best of cases.

Also a more exhaustive analysis of the light curve could indicate a probable precession period of the cometary nucleus, with a periodicity of approximately 40 days, due to a sudden increase in brightness or outburst in its light curve around +0.5 at +0.7 magnitudes (+0.7 <dm1 <+0.5) -> P (prec) ~ 40 days.

The estimated general gloss formula is:


m1 = +12.9 +5 log (D) +3.6 log (R)


Based on 525 MPC brightness measurements, and a data residual of +0.52.

Image Credit : J.P.Navarro Light Curve C/2021 A1 LEONARD ( Update 05/09/2021 )


domingo, 4 de abril de 2021

Analysis Light Curve COMET 2021 A1 LEONARD

 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.



Update Analysis Light Curve C/2021 A1 LEONARD A1

 My second analysis of the light curve of comet C / 2021 A1 LEONARD, indicates in T-300, a stagnation in the rate of increase in brightness ...