Reference numberMM/9/55
TitleLetter from G B Airy, Royal Observatory, Greenwich, to Edward Cooper
Date23 December 1845
DescriptionTitled 'Supposed New Planet' and begins 'The following is the substance of a communication from Professor Encke, dated 1845 december 15'.

The letter gives the details of an observation by Hencke of Driesen near Landsberg and observations by Professor Encke and Mr Galle at Berlin. It is noted that the "supposed planet resembles a star of the 9th Magnitude".

Although Neptune - not officially discovered until 1846 - may seem a possible candidate for the body being observed, it is more likely to be an asteroid (cf MM/9/65, in which the asteroid Parthenope is described as also having a "brightness equal to that of a star of the 9th magnitude").

Letter appears to be a circular containing information supplied to Greenwich Observatory from foreign observers.
Extent1 side
Access statusOpen
Related materialFor more on the discovery of Neptune see:
Fellows associated with this archive
NA5034Cooper; Edward Joshua (1798 - 1863)1798 - 1863
NA8035Airy; Sir; George Biddell (1801 - 1892); astronomer and Mathematician1801 - 1892
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