Observation by Tim Haymes: Comet 3I (ATLAS)

Uploaded by

Tim Haymes

Observer

Tim Haymes

Observed

2025 Jul 03 - 22:45

Uploaded

2025 Jul 04 - 12:10

Equipment

C11 stopped down to 6"
QHY174GPS
SharpCap 4.1 and Astrometrica

Exposure

60s subs x 20

Location

North Oxfordshire

Target name

3I (ATLAS) = C/2025 N1(ATLAS)

Title

Comet 3I (ATLAS)

About this image

Excited by the prospect of actually imaging this, i used an on-line ephemeris to plot its expected position on my star map (SMP)
With the altitude at 18 degrees, the dome wall cuts across the C11 aperture by about 50%. Never the less i imaged for about 20 minutes until some thin cloud reduced transparency too much. Fortunately no satellites crossed the field to spoil the run.

Astrometrica stacked on the expected motion and the object was found at magnitude 18.

I checked the position relative to the excellent images on the forum.

Files associated with this observation

I3(ATLAS)_20250703_thaymes.JPG (79.7 kB)

Like this image

Andy Wilson, Nick Quinn

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