Observation by Paul Leyland: Sycorax, the 17th satellite of Uranus

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Observer

Paul Leyland

Observed

2018 Nov 08 - 23:05

Uploaded

2019 May 21 - 15:18

Objects

Uranus

Equipment

0.4m Dilworth-Relay
SBIG-8XE CCD camera

Exposure

3x30s, 4x300s, 3x600s median stacked

Location

MPC J22, Tacande Observatory, La Palma

Target name

Sycorax (Uranus XVII)

Title

Sycorax, the 17th satellite of Uranus

About this image

Paul is embarked on an observation program to image and, where possible, perform astrometry on some of the smaller satellites in the outer solar system; this was his first attempt. Sycorax is circled in the insert; star 'D' is V=20.65 according to the GAIA-DR2 catalogue and 'g' is an as-yet unidentified background galaxy at a (guessed) 17th magnitude. Uranus and a 6th magnitude star were carefully placed outside the imaging region; their scattered light can be seen at the bottom edge and the top-right corner respectively.

Sycorax was discovered with the Hale 5m in September 1997 --- just over 21 years ago. This image was taken with a 12 times smaller aperture. The satellite has a V magnitude of 20.5 according to the MPC ephemeris. Despite a SNR of only 4 Paul was able to measure a position good to about 0.2 arcsecs which agrees well with the published position.

Great amateur science!

Comments

Files associated with this observation

sycorax_uranusXVII_leyland_081118.png (2.4 MB)

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