@misc{The_Royal_Observatory_Greenwich_Catalogue_1849,
 author={The Royal Observatory, Greenwich},
 address={London},
 howpublished={online},
 year={1849},
 publisher={Palmer and Clayton},
 language={eng},
 title={Catalogue of 2156 stars, formed from the observations made during twelve years, from1836 to 1847},
 keywords={star catalogue, the epoch 1845.0, Greenwich observatory},
}