Equatorial Telescope, for having an equatorial mounting. The observatory has an Earnshaw Regulator. It is a type of clock invented in 1791 by Thomas Earnshaw which was valued for its accuracy. Earnshaw travelled with it to Armagh to set it up in the new Observatory. In the early 1800s it was reported to have a mural circle instrument. Another instrument at the observatory is a sunshine recorder. In the 1830s the observatory bought a 15-inch reflecting telescope from the Grubb Telescope Company. The telescope used a metal mirror mounted on an equatorial mount with clockwork-drive. In 1885, a ten-inch aperture objective lens telescope was installed, also a Grubb telescope. This was installed in the Robinson dome. The observatory also has some meridian marks in the area, which look like stone arches that were used to mark the location of the meridian for astronomical instruments. There is also another that is an iron obelisk. The first meridian mark was built in 1793, and is in Tullyard, and it was used with the transit instrument. In 2005, two wide-angle cameras for a meteor detection systems were installed. Research The records of temperature take at Armagh Observatory between 1844 and 2004 were analyzed in 2006 research paper. List of directors See also Royal Astronomical Society Markree Observatory (Irish observatory 1830s-1900, discovered 9 Metis) List of astronomical observatories List of largest optical telescopes in the British Isles References External links A Visit to Armagh Observatory, AAVSO Infrastructure completed in 1789 Astronomical observatories in Northern Ireland Observatory Tourist attractions in County Armagh Science museums in Northern Ireland Grade A listed buildings 1789 establishments in Ireland Research institutes in the United Kingdom Astronomy institutes and departments