Tuesday 2 March 2021

A Cooke finds a Moon of Jupiter in the Wrong Place


A Cooke finds a Moon of Jupiter in the Wrong Place.

The Rev R J Gould at Mortimer Vicarage in Reading using a 5 inch Thomas Cooke and Sons of York telescope and was observing Jupiter on October 7th 1868 at 11h and 43 mins when he noticed an error in the Nautical Almanac on page 480.

It stated that the 3rd satellite will be on the west side of its primary in company with the 2nd and 4th; The fact was that it was on the east side with satellite number 1. The places of 2 and 4 were right enough but number 3 was certainly not so.

Gould goes on to say that we have no right to expect even the Nautical almanac to be absolutely free from errors and misprints, but I should like to know whether others have observed this or whether it can be shown to have been a mistake on the part of myself.

During the following days several observers confirmed Gould’s observations that the satellite was in the wrong place.

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