Taygete, or Jupiter XX


Taygete is a very tiny satellite, only about 5km across, and was not discovered until 2000. When this image was taken the satellite was at magnitude 22.4 and on the very limit of what can be detected in a single night with the equipment at Tacande Observatory. The signal to noise ratio is only 3.

To form the images above, 322 exposures were taken with a total duration of 174 minutes. The satellite was far too faint to show a trailed image so I stacked sub-images until the limiting stellar magnitude was estimated to be 22.5. Those subs were then stacked on the predicted position of the satellite as it moved past the stars, with the result shown.

Image information
Date and time of observation  2022-08-30 01:00 UT
Telescope 0.4m f/6.5 Dilworth-Relay
Camera Starlight Xpress Trius-PRO SX694 CCD
Filter None
Exposure 348×30s median-stacked
Centre of image RA 00h18m45.0s  Dec 00°32'06"
Image dimensions 3.4 arcmin × 3.4 arcmin