Epoch. True Apparent Places of Thirty-seven of the Principal Fixed Stars for every Tenth Day of the Year. The Upper Culmination at Greenwich. m. S. Dec. South. Right Asc. Dec. South. Right Asc. o Dec. North. m. S. h. 15 Right Asc. Dec. North. h. 15 27 is 8 is 19 m. 8. S. Jan. 151 8.02 45 42.5 8 57.97 49 37.7 28 20.93 13 8.5 36 54.07 53 56.7 56 44.81 23 25.0 True Apparent Places of Thirty-seven of the Principal Fixed Stars for every Tenth Day of the Year. Jan. 1 20 14.56 5 35.6 27 59.01 40 24.6 31 51.32 38 55.7 17 56.88 49 20.6 43 28.64 28 45.2 11 14.85 36.2 59.20 22.3 51.44 52.556.98 18.9 28.70 43.5 a 37.8 59.68 18.2 51.81 46.5 57.27 16.1 True Apparent Places of Thirty-seven of the Principal Fixed Stars for every Tenth Day of the Year. Epoch. The Upper Culmination at Greenwich. 2 1851. m. 0 44 12/30 ៩.៩ Jan. 1 36 19.14 45 7.5 14 59.08 57 30.0 58 5.96 2 33.8 49 22.47 24 50.9 57 19.1524 16.2 11 19.09 4.7 58.86 27.2 5.91 34.7 22.37 50.6 19.05 15.0 Right Asc. Dec. South. Right Asc. Dec. North. Dr. Young's Refractions, the Barometer being at 30 inches, and the internal Thermometer at 50, or the external at 47 degrees; with the Corrections for +one inch in the Barometer, and for one degree in the Thermometer of Fahrenheit. From page 19 of Vol. I. of Pearson's Practical Astronomy. 50 4 56 9.9 .62 23 2 16.5 4.57 .276 9.8 .60 24 9.6.59 25 9.5 .58 26 9.4 .57 27 9.2.56 28 9.1 .55 29 9.00 .556 30 8.86.548 31 8.74 .541 32 8.63.533 33 8.51.524 34 8.41 .517 35 8.30 .509 36 8.20 .503 37 8.10 .496 38 8.00 .490 39 7.89 .482 40 7.79 .476|41 2 10.1 4.35 .264 2 4.2 4.16 .252 1 58.8 3.97 .241 1 53.8 3,81 .230 1 49.1 3.65 .219 1 44.7 3.50 .209 1 40.5 3.36 .201 1 36.6 3.23 .193 1 33.0 3.11.186 1 29.5 2.99 .179 1 26.1 2.88 .173 1 23.0 2.78 .167 1 20.0 2.68 .161 1 17.1 2.58 .155 1 14.4 2.49 .149 1 11.8 2.40 .144 1 9.3 2.32 .139 1 6.9 2.24 .134 The correction for an increase of altitude of one inch in the barometer, or for a depression of one degree in the thermometer, is to be added to the tabular refraction; but when the barometer is lower than 30 inches, or the thermometer higher than 47 degrees, the correction becomes subtractive. When great accuracy is required, 0.003 inch should be deducted from the observed height of the barometer for each degree that the thermometer near it is above 50 degrees, and the same quantity added for an equal depression. Logarithm for converting Sidereal into Mean Solar Time +9.9988126. Mean Solar into Sidereal Time +0.0011874. 66 66 A second of time at the Equator contains 1521 feet. |