Observation by Dr Paul Leyland: (55565) 2002 AW197

Uploaded by

Dr Paul Leyland

Observer

Dr Paul Leyland

Observed

2023 Mar 10 - 23:00

Uploaded

2024 Jun 10 - 10:04

Objects

55565 2002 AW197

Equipment

0.4m Dilworth Relay
SX 814 CCD camera

Exposure

5640s in 95 subs stacked on computed motion of (55565).

Location

Tacande Observatory, MPC J22

Target name

(55565) 2002 AW197

Title

(55565) 2002 AW197

About this image

(55565) is a Trans-Neptunian Object listed in the BAA Handbook.as being about 760km in diameter, so not quite large enough to be a dwarf planet. According to the MPC, it had a V magnitude 20.0 and was 44.9 AU distant at the time of observation.

Typical sky brightness at Tacande is 21.4 magnitudes per square arc second, so a seeing disk of 3 arcseconds covers 7 square arcseconds and as log(7)*2.5 = 2.1, the sky brightness behind (55565) is 19.3. In other words, the TNO is 1.9 times fainter than the sky. That is why extensive image processing was applied, both noise removal and contrast stretching, to make the object visible and why sky noise is still apparent.

Files associated with this observation

2002_AW197.png (149.6 kB)

Like this image

Mike Harlow, Andy Wilson, Tim Haymes

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