star position: right ascension () and declination () (see table 1): 16h 29min 24.4s 16.49011 h 247.3517 ° : : : -26° 25' 55" -26.4319 ° : : b) Calculation for the latitude: ' We mean north latitude. c) Calculation for the longitude:  NJ = 136 - 1.5 T = 134,5 / = 0.003682409 (4) = 100.4606 + (36000.7701 * 0.003682409) = 233.0302 ° (5) 0  = 233.0302 - 247.3517 + (1.0027 * 348.7751) = 335.40 ° (6) It refers to the West longitude, which can be also expressed: or 24.60 east longitude. 335.40 ° - 360 ° = - 24.60 ° With some care, using this method, it is possible to determine the geographical position with less than 0.1° error. Table 1: Target stars suited for latitudes between 30 and 70 degrees. References: Meeus Jean, 1991, Astronomical Algorithms, Willmann-Bell, Inc. Sobel Dava, 1997, Longitudine, Rizzoli ed.
star position: right ascension () and declination () (see table 1): : 16h 29min 24.4s : 16.49011 h : 247.3517 ° : -26° 25' 55" : -26.4319 ° b) Calculation for the latitude: ' We mean north latitude. c) Calculation for the longitude:  NJ = 136 - 1.5 T = 134,5 / = 0.003682409 (4) 0 = 100.4606 + (36000.7701 * 0.003682409) = 233.0302 ° (5)  = 233.0302 - 247.3517 + (1.0027 * 348.7751) = 335.40 ° (6) It refers to the West longitude, which can be also expressed: 335.40 ° - 360 ° = - 24.60 ° or 24.60 east longitude. With some care, using this method, it is possible to determine the geographical position with less than 0.1° error. Table 1: Target stars suited for latitudes between 30 and 70 degrees. References: Meeus Jean, 1991, Astronomical Algorithms, Willmann-Bell, Inc. Sobel Dava, 1997, Longitudine, Rizzoli ed.
S8289_DETERMINING%20LATITUDE%20AND%20LONGITUDE%20with%20one%20star.docx