The Nautical Almanac and Astronomical Ephemeris for the Year ...order of the Lords Commissioners of the Admiralty, 1811 |
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Afcen aforefaid Aftronomical Aldebaran alfo Altitude Antares Aquila Arietis Board of Longitude Calculations Center from SUN computed conftructed corrected Days Noon decreaſe Diſtance DISTANCES of MOON's Eaft Eclipfes of Jupiter's Emerfions Ephemeris faid Commiffioners fame fecond Difference ferve fhall fignifies firft Difference firſt Fomalhaut fubtracted fuch Method fufficient Geocentric Greenwich H. M. S. Days Heliocentric Immerfions increaſe invifible JOHN POND Laft Quarter Latitude Longitude at Sea Lunar Tables MAYER's Merid Midn Midnight Month MOON's Center Moon's Latitude Moon's Longitude Motion Nautical Almanac NEVIL MASKELYNE Node Number obferved Paffage Right Afcenfion paffing the Meridian Parallax Pegafi Perfons Phafes Pollux Proportional Logarithm publiſhed Purpoſe Regulus Requifite Tables Reward or Sum SAMUEL VINCE SATELLITES of JUPITER Semidiam Spica STARS EAST Stars Names Stars Noon STARS WEST Sun's Longitude Sun's right Afcenfion Sunday after Trinity Teleſcopes thefe TOBIA MAYER ufeful uſed Week Weft XVh XVIII ΙΟ
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Página 41 - F Sa Su M Tu W Th F Sa Su M Tu W Th F Sa Su M Tu W Th F Sa Su...
Página 153 - Satellite being carefully observed in any Place according to mean Time, the Longitude from Greenwich is found immediately by taking the Difference of the Observation from the corresponding Time shown in the Ephemeris, which must be turned into Degrees, &c. by...
Página 151 - Chair proposed for this purpose, but could not derive any advantage from the Use of it; and, considering the great power requisite in a Telescope for making these Observations well, and the Violence as well as Irregularities of the Motion of a Ship, I am afraid the complete Management of a Telescope on Shipboard will always remain among the Desiderata.
Página 149 - Correction, which added to, or subtracted from the apparent Time (according to its Title at the Top of the Column) gives equated or mean Time, or that which should be shown by a good Clock or Watch.
Página 153 - To know if an Eclipfe will be vifible in any place, find whether Jupiter be 8° above the Hori2on of the Place, and the Sim as much below it.
Página 152 - Emeriion of the three firft Satellites ; and Ten Minutes before that of the fourth Satellite ; but if the Longitude of the Place is very uncertain, he muft begin to look out for the Eclipfe proportionably...