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AORKEY = 10195712
PI = Charles Woodward
PROGID = 2316
PROTITLE = The Astromineralogy of Solar System Comets
OBJECT = Hartley 1
PKUPACCU = Moderate
PKUPFILT = RED
PKUPFLUX = 200.000
PKUPXTND = 1
PTGDIFF (ACQ) = 112.50510
PTGDIFF (SS) = 116.13821
ACQ XC = 0
ACQ YC = 0
SS XC = 0
SS YC = 0
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EXPLANATION
The predicted flux of the PU target is 200 mJy, but the source near
the aim point is 1-2 orders of magnitude fainter. As a result, the
onboard PU algorithm was not able to find a valid centroid and
generated a NO_CENTROID alarm. It's possible that the faint source is
partially in the slit during the spectrum.