Official Comet Hunting Guide
Report a SOHO Object
Report a STEREO Object
Basics (via NASA)
LASCO C3 Transits
STEREO L4/L5 Campaign
STEREO JAVA Orbit Tool
C2/C3 Comet Tracks
NASA Citizen Science
SOHO Real-Time Images
Comet McNaught in 2007
15-years of SOHO Comets
Transits of Objects through the LASCO C3 and C2 fields of view (FOV) in 2019
The following list was compiled by Worachate Boonplod.
All dates and magnitudes are approximate.Note that the limiting magnitude for LASCO C3 is approximately 8.0 to 8.5 (depending on object/star), and for C2 is approximately 8.5 - 9.0.
IMAGE CREDIT: Worachate Boonplod
Regarding 322P/SOHO, the comet should appear in C2 moving from left to right and probably be detectable in C3. After that, it will reenter C2 moving from right to left but its brightness will likely be lower than limiting magnitude of C2.
Also of note:there will be a Mercury transit (of the Sun) on November 11, 2019.