perihelion. @fox85 and @has99 studied the option that the ancient fireballs observed between December 6 and 18 apparently emanated from the same radiant. They worked out that these bolides could not be connected to the Geminid meteor stream because of its rapid orbital evolution but might belong to the MON. @fox85 confirmed the slow evolution of the ascending node in the 2400yr integration of the cometary orbit to the past. Their work also confirmed that the heliocentric distance of the MON ascending node is stable as well and is close to 1AU one thousand years to the past or to the future.

![The orbital evolution of the heliocentric distance of the ascending and descending nodes of the nominal orbit of the comet C/1917 F1 Mellish (solid line) and its clones (points). Up - clones generated within the 0.8yr orbital period error, down - clones altered in order to put ascending node close to 1AU at the present day.[]{data-label="F8"}](fig8-a.eps){width="8.0cm"}

![The orbital evolution of the heliocentric distance of the ascending and descending nodes of the nominal orbit of the comet C/1917 F1 Mellish (solid line) and its clones (points). Up - clones generated within the 0.8yr orbital period error, down - clones 