The Machholz Interplanetary Complex

In their paper from 2005 Z. Sekanina and P. Chodas have this schematic representation of the Machholz interplanetary complex.


Figure 2 from Sekanina & Chodas, Astrophys. J., Suppl. Ser., vol. 161, pp. 551-586 (2005)

The black line is "a plot of the longitude of the ascending node against the inclination for an invariable orientation of the line of apsides
defined by the longitude of perihelion L and the latitude of perihelion B".

Now, 18 years later, I have generated such a plot with all known apparitions of the members of the Machholz interplanetary complex -
mainly with orbital solutions from Karl Battams' unpublished measurements.


The blue line is for a fixed line of apsides with L/B = 101°/11°, which fits the members of the complex slightly better than 100°/10°.

Several comets were found between 96P and the Marsden group, the Kracht group extends to a nodal longitude of 20° and a comet
(C/2008 Y12) was found at the position of the southern delta Aquarids.

Table of the new comets in the gap between 96P and the Marsden group:

Designation SOHO# T q peri node incl L B P
C/1996 V2 930 1996 11 11.84 0.0514 18.86 86.51 34.24 102.3 10.5 6.00
C/2002 V5 542 2002 11 12.42 0.0506 18.82 86.60 34.36 102.3 10.5 5.99
C/2012 K 2295 2012 05 24.73 0.0626 22.22 85.54 35.20 104.0 12.6 5.69
C/2014 V 2825 2014 11 06.92 0.0491 19.04 86.51 34.19 102.4 10.6 5.98
C/2018 C 3491 2018 02 05.24 0.0630 22.35 85.37 34.99 104.0 12.6 5.70
                   
C/2011 K 2071 2011 05 20.46 0.0707 15.84 89.89 45.30 101.2 11.2 5.08
C/2016 K (999z) 2016 05 31.20 0.0704 15.86 89.85 45.26 101.2 11.2 5.00
C/2021 J 4192 2021 05 15.10 0.0662 16.29 89.44 44.64 101.2 11.4 4.91
C/2022 U 4537 2022 10 20.50 0.0697 16.33 89.53 42.82 101.7 11.0  
C/2022 U 4538 2022 10 20.54 0.0697 16.05 89.79 42.82 101.7 10.8  
                   
C/2022 X PSP-8 2022 12 06.56 0.0876 15.56 91.89 50.60 101.9 12.0  

with SOHO-930 =542 = 2825, SOHO-2295 = 3491, SOHO-2071 = (999z) = 4192.
More about these comets is here.