Harold Corwin

There is some error in Javelle's observation that I haven't worked out yet. The RA is within his usual uncertainties, but the declination is 2.5 arcmin too small. The galaxy I've taken as the IC object matches Javelle's description as he would see it in his big refractor, so this is probably the object he picked up.

If Javelle's declination offset is +3' 50.7" rather than +1' 20.7" (note that Javelle works in north polar distance, so his published offset signs are negative rather than positive), the declination of IC 1117 falls within his usual errors of the correct declination for the galaxy. Perhaps this is a some sort of micrometer reading error, perhaps an even turn of the declination screw? It will take some digging in the Nice publications to find the parameters of the micrometer to determine if this hypothesis has any merit. I obviously haven't done that yet.

― IC Notes by Harold Corwin

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