C/2023 A3 (Tsuchinshan-ATLAS)

A single evening of clear weather in an otherwise gray month gave me the opportunity to capture C/2023 A3. The light pollution was strong, but comet was visible to the naked eye even in the middle of Oslo.

The star streaks are a result of stacking relative to the comet, and the gap in the middle is due to lost frames. The light pollution was so strong that barely any stars could be used in registration for alignment, resulting in about ~40 % lost frames.

Metadata

• Location
  • Name: Oslo, Norway
  • Lat Long: 59.93, 10.76
  • Datetime: October 15th, ~20:00h
  • Bortle Scale: Class 9
• Gear
  • Camera: Fujifilm X-T1
  • Lens: Pentax Takumar 300mm f/4
  • Tracking: None/Tripod
• Exposure
  • Aperture: f/4.8
  • Focal Length: 300mm
  • Shutter Speed: 2/1s
  • ISO: 3200
• Processing
  • Light Frames: 181
  • Stacker: DeepSkyStacker
  • Total Exposure: 6 min 2 s
  • Editor: Siril