Table 1: Observing circumstances for Sedna.

Date & Time a		 $t_{{\rm int}}^{{b}}$ $t_{{\rm AOR}}^{{b}}$ rc $\Delta^{{c}}$ $\alpha^{{c}}$
(UT) (min) (min) (AU) (AU) ( $\hbox{$^\circ$ }$)
5 Feb. 2006  10:32 26.7 63.6 88.8584 88.5206 0.61
9 Feb. 2006  09:03 26.7 63.6 88.8549 88.5800 0.62
a Time is given at the start of the observation; b $t_{{\rm int}}$ is the integration time for each channel ( $100~{\rm s}\times 16$ frames) and $t_{{\rm AOR}}$ is the total observing time; c Heliocentric distance (r), observer distance ($\Delta$), and phase angle ($\alpha$) are given in Spitzer-centered coordinates.

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