Cassini ISS mutual event astrometry of the mid-sized Saturnian satellites 2005–2012

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Volume 572 (December 2014)

A&A, 572 (2014) A43

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Table 2

Sample of Cassini ISS observations.

Image ID	Mid-time (UTC)	α _c	δ _c	TWIST	Line^a	Sample^a	α	δ	Body
		(deg)	(deg)	(deg)	(px)	(px)	(deg)	(deg)

N1487595425	2005 Feb. 20 12:30:38.277	27.296799	–6.438903	178.585994	595.83	591.92	27.268304	–6.467161	DIONE
N1487595459	2005 Feb. 20 12:31:12.277	27.289024	–6.438771	178.630998	595.78	591.47	27.260708	–6.467036	DIONE
N1487595459	2005 Feb. 20 12:31:12.277	27.289024	–6.438771	178.630998	621.95	994.47	27.121289	–6.472685	RHEA
N1487595493	2005 Feb. 20 12:31:46.276	27.281160	–6.438414	178.595788	596.02	590.78	27.253062	–6.466749	DIONE
N1487595493	2005 Feb. 20 12:31:46.276	27.281160	–6.438414	178.595788	622.42	947.46	27.129638	–6.472789	RHEA

Notes. Columns α_c, δ_c and TWIST refer to the right ascension, declination and twist angle of the camera’s pointing vector in the International Celestial Reference Frame (ICRF), while α and δ are the right ascension and declination in the ICRF for the body listed in the far right-hand column. Relative to the SAT360 ephemeris, considering all the individual positions together, we obtain a precision of 0.34 pixels in line and 0.41 in sample. The full table is available from the CDS.

^(a)

The origin of the line, sample coordinate system is at the top left of the image with line, y, increasing downwards and sample, x, to the right. Image size is 1024 by 1024 pixels.

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