EAA Observing Session: 10, December11/12/2025
Astronomy

Session Data

  • Date:  10/12/2025
  • Time:  18:52 – 20:16 UT
  • Seeing: II. Good – Slight
  • Transparency: III. Clear with slight haze
  • Temp: 9 C,
  • Air Pressure: 1022mb
  • Humidity: 96%
  • Dew Point: 8 C
  • Wind Speed: 12 mph
  • Average SQM:  magn/arcsec^2

Scope: TMB 80 f/6  Camera: ZWO ASI 183MM. No darks or flats.

Comet C/2025 T1 ATLAS

Not much to see here. But there is a bright core and a faint Coma, which is too small to measure accurately from the image. The bright star to the NW of the target is HD187182.

Total Integration Time:  135 sec

Comet C/2025 K1 ATLAS

At least you can see the tail here. Extending about 9 arc min at a PA of 97 degrees. The short focal length prohibits any sight of the two fragmentary components.

Total Integration Time:  195 sec

Comet 240P NEAT

The transparency is deteriorating, so everything is quite soft, but even with this small scope, the separation of the main body and the B fragment can be made out in this image below.

The B component is about 2 arc min at a PA of 110 degrees from the main body.

Total Integration Time:  285 sec