Grazing Occultation of 820 M1 Magnitude 5.8 [Red = 4.9] s R820 = 117 Tauri Date: 2017 Feb 06 18h 23m, to 2017 Feb 06 18h 51m Nominal site altitude 100m E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA o ' " o ' " h m s Alt Alt Az o o o 18 0 0 65 39 44.2 18 30 59 41 168 1.14 173.5 176.16 -0.55S 19 0 0 65 45 44.6 18 31 56 41 170 1.14 173.6 176.24 -0.63S 20 0 0 65 51 25.7 18 32 53 41 171 1.14 173.7 176.32 -0.71S 21 0 0 65 56 47.6 18 33 49 41 173 1.14 173.8 176.40 -0.79S 22 0 0 66 1 50.5 18 34 44 41 174 1.14 173.9 176.48 -0.87S 23 0 0 66 6 34.6 18 35 39 41 176 1.14 174.0 176.56 -0.95S 24 0 0 66 11 0.2 18 36 34 41 177 1.14 174.0 176.64 -1.03S 25 0 0 66 15 7.2 18 37 29 41 179 1.14 174.1 176.72 -1.11S 26 0 0 66 18 56.1 18 38 23 41 181 1.15 174.2 176.80 -1.19S 27 0 0 66 22 26.8 18 39 17 41 182 1.15 174.3 176.88 -1.27S 28 0 0 66 25 39.6 18 40 11 41 184 1.15 174.4 176.96 -1.35S 29 0 0 66 28 34.6 18 41 4 41 185 1.16 174.4 177.04 -1.43S 30 0 0 66 31 11.9 18 41 57 41 187 1.16 174.5 177.12 -1.51S 31 0 0 66 33 31.7 18 42 50 41 188 1.17 174.6 177.20 -1.59S Path coordinates are referred to WGS84 (as used by GPS), with the nominal site altitude being referenced to Mean Sea Level. The path is adjusted for the effects of refraction at low moon altitudes. Projected diameter of star 10 meters [Estimated] 820 is variable: 820 = NSV 16312, 5.85 to 5.88, Hp Librations Long +0.88 Lat +7.17 P +176.81 D +7.47 Illumination of moon 78%+ Elongation of Moon 124 Vertical Profile Scale approx. 2.81 km/arcsec at mean distance of moon Horizontal Scale Factor 1.73 deg/min At longitude 25.00: Limiting Magnitudes for various telescope apertures (in cm) CA\Tdia 5 10 15 20 25 30 35 -5.1 2.7 4.1 4.9 5.3 5.6 5.8 6.0 -3.1 2.7 4.1 4.9 5.3 5.6 5.8 6.0 -1.1 2.7 4.1 4.9 5.3 5.6 5.8 6.0 0.9 2.7 4.1 4.9 5.3 5.6 5.8 6.0 2.9 4.2 5.6 6.4 6.9 7.2 7.4 7.6 ------------------------------------------------------------------------------ Results of Observer Scan UT Site Long. Lat. Dist. h m s Tervola 24.8 66.1 17km 18 37 18.2 Rovaniemi 25.7 66.5 21km 18 38 8.5 Kemijärvi 27.4 66.7 35km 18 39 40.7 Posio 28.2 66.1 36km 18 40 19.7 Tornio 24.1 65.8 38km 18 36 42.2 Salla 28.7 66.8 41km 18 40 46.2 Ranua 26.5 65.9 46km 18 38 50.6 Kuusamo 29.2 66.0 58km 18 41 14.5 Pello 24.0 66.8 65km 18 36 32.5 Meltaus 25.4 66.9 70km 18 37 48.7 Grazing Occultation of 820 M1 Magnitude 5.8 [Red = 4.9] s R820 = 117 Tauri Date: 2017 Feb 06 18h 23m, to 2017 Feb 06 18h 51m Nominal site altitude 100m E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA o ' " o ' " h m s Alt Alt Az o o o 10 0 0 64 39 35.3 18 23 11 41 155 1.15 172.9 175.49 0.12S 10 15 0 64 41 48.3 18 23 26 41 156 1.15 172.9 175.51 0.10S 10 30 0 64 43 59.9 18 23 41 41 156 1.15 172.9 175.53 0.08S 10 45 0 64 46 10.2 18 23 56 41 156 1.15 172.9 175.55 0.06S 11 0 0 64 48 19.2 18 24 11 41 157 1.15 173.0 175.58 0.04S 11 15 0 64 50 26.8 18 24 26 41 157 1.15 173.0 175.60 0.02S 11 30 0 64 52 33.1 18 24 41 41 158 1.15 173.0 175.62 0.00S 11 45 0 64 54 38.1 18 24 56 41 158 1.15 173.0 175.64 -0.03S 12 0 0 64 56 41.8 18 25 11 41 158 1.15 173.1 175.67 -0.06S 12 15 0 64 58 44.1 18 25 26 41 159 1.15 173.1 175.69 -0.08S 12 30 0 65 0 45.2 18 25 40 41 159 1.15 173.1 175.71 -0.10S 12 45 0 65 2 44.9 18 25 55 41 160 1.14 173.1 175.73 -0.12S 13 0 0 65 4 43.4 18 26 10 41 160 1.14 173.1 175.75 -0.14S 13 15 0 65 6 40.5 18 26 25 41 160 1.14 173.2 175.77 -0.16S 13 30 0 65 8 36.4 18 26 39 41 161 1.14 173.2 175.79 -0.18S 13 45 0 65 10 30.9 18 26 54 41 161 1.14 173.2 175.81 -0.20S 14 0 0 65 12 24.2 18 27 9 41 162 1.14 173.2 175.83 -0.22S 14 15 0 65 14 16.1 18 27 23 41 162 1.14 173.2 175.85 -0.24S 14 30 0 65 16 6.8 18 27 38 41 162 1.14 173.3 175.87 -0.26S 14 45 0 65 17 56.3 18 27 52 41 163 1.14 173.3 175.89 -0.28S 15 0 0 65 19 44.4 18 28 7 41 163 1.14 173.3 175.91 -0.30S 15 15 0 65 21 31.3 18 28 21 41 164 1.14 173.3 175.93 -0.32S 15 30 0 65 23 16.9 18 28 36 41 164 1.14 173.3 175.96 -0.34S 15 45 0 65 25 1.2 18 28 50 41 164 1.14 173.4 175.98 -0.36S 16 0 0 65 26 44.3 18 29 5 41 165 1.14 173.4 176.00 -0.38S 16 15 0 65 28 26.2 18 29 19 41 165 1.14 173.4 176.02 -0.40S 16 30 0 65 30 6.7 18 29 34 41 166 1.14 173.4 176.04 -0.42S 16 45 0 65 31 46.1 18 29 48 41 166 1.14 173.4 176.06 -0.44S 17 0 0 65 33 24.2 18 30 2 41 166 1.14 173.5 176.08 -0.47S 17 15 0 65 35 1.0 18 30 17 41 167 1.14 173.5 176.10 -0.49S 17 30 0 65 36 36.7 18 30 31 41 167 1.14 173.5 176.12 -0.51S 17 45 0 65 38 11.0 18 30 45 41 168 1.14 173.5 176.14 -0.53S 18 0 0 65 39 44.2 18 30 59 41 168 1.14 173.5 176.16 -0.55S 18 15 0 65 41 16.1 18 31 14 41 168 1.14 173.6 176.18 -0.57S 18 30 0 65 42 46.9 18 31 28 41 169 1.14 173.6 176.20 -0.59S 18 45 0 65 44 16.4 18 31 42 41 169 1.14 173.6 176.22 -0.61S 19 0 0 65 45 44.6 18 31 56 41 170 1.14 173.6 176.24 -0.63S 19 15 0 65 47 11.7 18 32 10 41 170 1.14 173.6 176.26 -0.65S 19 30 0 65 48 37.6 18 32 24 41 170 1.14 173.7 176.28 -0.67S 19 45 0 65 50 2.2 18 32 39 41 171 1.14 173.7 176.30 -0.69S 20 0 0 65 51 25.7 18 32 53 41 171 1.14 173.7 176.32 -0.71S 20 15 0 65 52 47.9 18 33 7 41 172 1.14 173.7 176.34 -0.73S 20 30 0 65 54 9.0 18 33 21 41 172 1.14 173.7 176.36 -0.75S 20 45 0 65 55 28.9 18 33 35 41 172 1.14 173.8 176.38 -0.77S 21 0 0 65 56 47.6 18 33 49 41 173 1.14 173.8 176.40 -0.79S 21 15 0 65 58 5.1 18 34 3 41 173 1.14 173.8 176.42 -0.81S 21 30 0 65 59 21.4 18 34 16 41 173 1.14 173.8 176.44 -0.83S 21 45 0 66 0 36.6 18 34 30 41 174 1.14 173.9 176.46 -0.85S 22 0 0 66 1 50.5 18 34 44 41 174 1.14 173.9 176.48 -0.87S 22 15 0 66 3 3.3 18 34 58 41 175 1.14 173.9 176.50 -0.89S 22 30 0 66 4 14.9 18 35 12 41 175 1.14 173.9 176.52 -0.91S 22 45 0 66 5 25.3 18 35 26 41 175 1.14 173.9 176.54 -0.93S 23 0 0 66 6 34.6 18 35 39 41 176 1.14 174.0 176.56 -0.95S 23 15 0 66 7 42.7 18 35 53 41 176 1.14 174.0 176.58 -0.97S 23 30 0 66 8 49.7 18 36 7 41 177 1.14 174.0 176.60 -0.99S 23 45 0 66 9 55.5 18 36 21 41 177 1.14 174.0 176.62 -1.01S 24 0 0 66 11 0.2 18 36 34 41 177 1.14 174.0 176.64 -1.03S 24 15 0 66 12 3.7 18 36 48 41 178 1.14 174.1 176.66 -1.05S 24 30 0 66 13 6.0 18 37 2 41 178 1.14 174.1 176.68 -1.07S 24 45 0 66 14 7.2 18 37 15 41 179 1.14 174.1 176.70 -1.09S 25 0 0 66 15 7.2 18 37 29 41 179 1.14 174.1 176.72 -1.11S 25 15 0 66 16 6.1 18 37 43 41 179 1.15 174.1 176.74 -1.13S 25 30 0 66 17 3.9 18 37 56 41 180 1.15 174.2 176.76 -1.15S 25 45 0 66 18 0.6 18 38 10 41 180 1.15 174.2 176.78 -1.17S 26 0 0 66 18 56.1 18 38 23 41 181 1.15 174.2 176.80 -1.19S 26 15 0 66 19 50.5 18 38 37 41 181 1.15 174.2 176.82 -1.21S 26 30 0 66 20 43.7 18 38 50 41 181 1.15 174.2 176.84 -1.23S 26 45 0 66 21 35.8 18 39 4 41 182 1.15 174.3 176.86 -1.25S 27 0 0 66 22 26.8 18 39 17 41 182 1.15 174.3 176.88 -1.27S 27 15 0 66 23 16.7 18 39 31 41 182 1.15 174.3 176.90 -1.29S 27 30 0 66 24 5.5 18 39 44 41 183 1.15 174.3 176.92 -1.31S 27 45 0 66 24 53.1 18 39 57 41 183 1.15 174.3 176.94 -1.33S 28 0 0 66 25 39.6 18 40 11 41 184 1.15 174.4 176.96 -1.35S 28 15 0 66 26 25.0 18 40 24 41 184 1.15 174.4 176.98 -1.37S 28 30 0 66 27 9.3 18 40 37 41 184 1.16 174.4 177.00 -1.39S 28 45 0 66 27 52.5 18 40 51 41 185 1.16 174.4 177.02 -1.41S 29 0 0 66 28 34.6 18 41 4 41 185 1.16 174.4 177.04 -1.43S 29 15 0 66 29 15.6 18 41 17 41 186 1.16 174.5 177.07 -1.45S 29 30 0 66 29 55.5 18 41 31 41 186 1.16 174.5 177.08 -1.47S 29 45 0 66 30 34.2 18 41 44 41 186 1.16 174.5 177.10 -1.49S 30 0 0 66 31 11.9 18 41 57 41 187 1.16 174.5 177.12 -1.51S 30 15 0 66 31 48.5 18 42 10 41 187 1.16 174.5 177.14 -1.53S 30 30 0 66 32 24.0 18 42 24 41 187 1.16 174.5 177.16 -1.55S 30 45 0 66 32 58.4 18 42 37 41 188 1.16 174.6 177.18 -1.57S 31 0 0 66 33 31.7 18 42 50 41 188 1.17 174.6 177.20 -1.59S 31 15 0 66 34 3.9 18 43 3 41 189 1.17 174.6 177.22 -1.60S 31 30 0 66 34 35.0 18 43 16 41 189 1.17 174.6 177.24 -1.62S 31 45 0 66 35 5.0 18 43 29 41 189 1.17 174.6 177.26 -1.64S 32 0 0 66 35 34.0 18 43 42 41 190 1.17 174.7 177.28 -1.66S 32 15 0 66 36 1.8 18 43 55 41 190 1.17 174.7 177.30 -1.68S 32 30 0 66 36 28.6 18 44 9 40 191 1.17 174.7 177.32 -1.70S 32 45 0 66 36 54.3 18 44 22 40 191 1.17 174.7 177.34 -1.72S 33 0 0 66 37 18.9 18 44 35 40 191 1.17 174.7 177.35 -1.74S 33 15 0 66 37 42.5 18 44 48 40 192 1.18 174.8 177.37 -1.76S 33 30 0 66 38 4.9 18 45 1 40 192 1.18 174.8 177.39 -1.78S 33 45 0 66 38 26.3 18 45 14 40 192 1.18 174.8 177.41 -1.80S 34 0 0 66 38 46.6 18 45 27 40 193 1.18 174.8 177.43 -1.82S 34 15 0 66 39 5.9 18 45 40 40 193 1.18 174.8 177.45 -1.84S 34 30 0 66 39 24.1 18 45 52 40 194 1.18 174.9 177.47 -1.86S 34 45 0 66 39 41.1 18 46 5 40 194 1.18 174.9 177.49 -1.88S 35 0 0 66 39 57.2 18 46 18 40 194 1.19 174.9 177.51 -1.90S 35 15 0 66 40 12.1 18 46 31 40 195 1.19 174.9 177.53 -1.92S 35 30 0 66 40 26.0 18 46 44 40 195 1.19 174.9 177.55 -1.94S 35 45 0 66 40 38.9 18 46 57 40 195 1.19 175.0 177.57 -1.96S 36 0 0 66 40 50.6 18 47 10 40 196 1.19 175.0 177.59 -1.98S 36 15 0 66 41 1.4 18 47 23 40 196 1.19 175.0 177.61 -1.99S 36 30 0 66 41 11.0 18 47 35 40 197 1.19 175.0 177.63 -2.01S 36 45 0 66 41 19.6 18 47 48 40 197 1.20 175.0 177.65 -2.03S 37 0 0 66 41 27.1 18 48 1 40 197 1.20 175.1 177.67 -2.05S 37 15 0 66 41 33.6 18 48 14 40 198 1.20 175.1 177.68 -2.07S 37 30 0 66 41 39.0 18 48 27 40 198 1.20 175.1 177.70 -2.09S 37 45 0 66 41 43.3 18 48 39 40 198 1.20 175.1 177.72 -2.11S 38 0 0 66 41 46.6 18 48 52 40 199 1.20 175.1 177.74 -2.13S 38 15 0 66 41 48.8 18 49 5 40 199 1.21 175.2 177.76 -2.15S 38 30 0 66 41 50.0 18 49 17 40 200 1.21 175.2 177.78 -2.17S 38 45 0 66 41 50.1 18 49 30 40 200 1.21 175.2 177.80 -2.19S 39 0 0 66 41 49.1 18 49 43 40 200 1.21 175.2 177.82 -2.21S 39 15 0 66 41 47.1 18 49 56 40 201 1.21 175.2 177.84 -2.23S 39 30 0 66 41 44.1 18 50 8 39 201 1.21 175.2 177.86 -2.24S 39 45 0 66 41 40.0 18 50 21 39 201 1.22 175.3 177.88 -2.26S 40 0 0 66 41 34.8 18 50 33 39 202 1.22 175.3 177.90 -2.28S Path coordinates are referred to WGS84 (as used by GPS), with the nominal site altitude being referenced to Mean Sea Level. The path is adjusted for the effects of refraction at low moon altitudes. Projected diameter of star 10 meters [Estimated] 820 is variable: 820 = NSV 16312, 5.85 to 5.88, Hp Librations Long +0.88 Lat +7.17 P +176.81 D +7.47 Illumination of moon 78%+ Elongation of Moon 124 Vertical Profile Scale approx. 2.81 km/arcsec at mean distance of moon Horizontal Scale Factor 1.73 deg/min At longitude 25.00: Limiting Magnitudes for various telescope apertures (in cm) CA\Tdia 5 10 15 20 25 30 35 -5.1 2.7 4.1 4.9 5.3 5.6 5.8 6.0 -3.1 2.7 4.1 4.9 5.3 5.6 5.8 6.0 -1.1 2.7 4.1 4.9 5.3 5.6 5.8 6.0 0.9 2.7 4.1 4.9 5.3 5.6 5.8 6.0 2.9 4.2 5.6 6.4 6.9 7.2 7.4 7.6 ------------------------------------------------------------------------------ Results of Observer Scan UT Site Long. Lat. Dist. h m s Enontekiö 23.6 68.4 243km 18 36 14.2 Ivalo 27.5 68.7 248km 18 39 45.9 Kajaani Lehtikangas 27.7 64.2 242km 18 39 56.8 Kemijärvi 27.4 66.7 35km 18 39 40.7 Kolari 23.8 67.3 127km 18 36 22.8 Kuusamo 29.2 66.0 58km 18 41 14.5 Meltaus 25.4 66.9 70km 18 37 48.7 Muonio 23.7 68.0 196km 18 36 16.3 Oulu Puolivälikangas 25.5 65.0 137km 18 37 55.4 Pello 24.0 66.8 65km 18 36 32.5 Posio 28.2 66.1 36km 18 40 19.7 Pudasjärvi 27.0 65.4 111km 18 39 16.4 Puolanka 27.7 64.9 170km 18 39 53.3 Raahe 24.5 64.7 168km 18 37 0.5 Ranua 26.5 65.9 46km 18 38 50.6 Rovaniemi 25.7 66.5 21km 18 38 8.5 Salla 28.7 66.8 41km 18 40 46.2 Sodankylä 26.6 67.4 117km 18 38 55.3 Tervola 24.8 66.1 17km 18 37 18.2 Tornio 24.1 65.8 38km 18 36 42.2 Tulppio 29.2 67.8 141km 18 41 15.3 Vuotso 27.1 68.1 189km 18 39 23.6