I have taken a lot of Positions with my C11. I tried to use the Seestar S50, but says always invisible.
At the Moment the Comet is near M107 and so it could not invisible.
The MPC Ephemeris was in July wrong, the JPL Horizons always right.
The Comet is 16-17m at the Moment and not 19.8 or so like MPC says.
Please give S50 a Chance...
Regards Corner