Grazing Occultation of 1924cF3 Magnitude 5.8 [Red = 5.5] R1924 = 66 Virginis Date: 2017 Mar 14 21h 51m, to 2017 Mar 14 22h 7m 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 63 55 28.8 21 53 9 14 136 4.00 22.3 359.50 -6.70N 19 0 0 63 39 53.0 21 53 30 15 137 3.85 22.4 359.59 -6.79N 20 0 0 63 23 54.2 21 53 53 15 138 3.71 22.5 359.69 -6.89N 21 0 0 63 7 28.3 21 54 17 16 139 3.57 22.6 359.78 -6.98N 22 0 0 62 50 36.5 21 54 42 16 140 3.45 22.7 359.88 -7.08N 23 0 0 62 33 18.6 21 55 9 17 141 3.33 22.8 359.98 -7.18N 24 0 0 62 15 33.5 21 55 37 17 142 3.22 22.9 0.08 -7.28N 25 0 0 61 57 21.6 21 56 6 18 143 3.11 23.0 0.18 -7.38N 26 0 0 61 38 41.9 21 56 38 18 145 3.01 23.1 0.28 -7.48N 27 0 0 61 19 34.0 21 57 10 19 146 2.91 23.2 0.39 -7.59N 28 0 0 60 59 57.2 21 57 45 20 147 2.81 23.3 0.49 -7.69N 29 0 0 60 39 50.9 21 58 22 20 148 2.73 23.4 0.60 -7.80N 30 0 0 60 19 14.7 21 59 0 21 149 2.64 23.5 0.70 -7.91N 31 0 0 59 58 8.2 21 59 40 21 150 2.56 23.6 0.81 -8.02N 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 1 meters [Estimated] 1924 is double: AB 5.8 0.020" 245.0 (66 Vir) Graze path of B approximately 0.0 km north, and 0.0 secs earlier compared to A - refer to graze profile for exact distances Librations Long +3.75 Lat -4.37 P -0.12 D +4.64 Illumination of moon 94%- Elongation of Moon 153 Vertical Profile Scale approx. 2.99 km/arcsec at mean distance of moon Horizontal Scale Factor 1.64 deg/min At longitude 25.00: Limiting Magnitudes for various telescope apertures (in cm) CA\Tdia 5 10 15 20 25 30 35 -11.4 2.1 3.4 4.1 4.4 4.6 4.8 4.9 -9.4 2.1 3.4 4.1 4.4 4.6 4.8 4.9 -7.4 2.1 3.4 4.1 4.4 4.6 4.8 4.9 -5.4 2.1 3.4 4.1 4.4 4.6 4.8 4.9 -3.4 2.1 3.4 4.1 4.4 4.6 4.8 4.9 ------------------------------------------------------------------------------ Results of Observer Scan UT Site Long. Lat. Dist. h m s Mäntyharju 26.9 61.4 5km 21 57 6.7 Hartola 26.0 61.6 6km 21 56 38.3 Vaasa Sundom 21.6 63.0 7km 21 54 31.4 Lappeenranta 28.2 61.1 11km 21 57 52.0 Ähtäri 24.1 62.6 30km 21 55 39.5 Mikkeli Kiiskinmäki 27.2 61.7 40km 21 57 18.7 Imatra 28.8 61.2 44km 21 58 13.4 Jyväskylä Rihlaperä 25.7 62.2 45km 21 56 28.2 Hamina 27.2 60.6 64km 21 57 17.4 Lahti Pirttiharju 25.6 61.0 74km 21 56 24.6 Tampere Kauppi 23.8 61.5 76km 21 55 30.9 Artjärvi Tähtikallio 26.2 60.7 78km 21 56 44.5 Kangasala 24.0 61.4 80km 21 55 36.8 Grazing Occultation of 1924cF3 Magnitude 5.8 [Red = 5.5] R1924 = 66 Virginis Date: 2017 Mar 14 21h 51m, to 2017 Mar 14 22h 7m 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 65 46 23.3 21 50 58 10 128 5.62 21.6 358.80 -6.00N 10 15 0 65 43 16.2 21 51 2 10 128 5.55 21.6 358.82 -6.02N 10 30 0 65 40 8.1 21 51 5 10 129 5.48 21.6 358.84 -6.04N 10 45 0 65 36 58.6 21 51 8 10 129 5.42 21.6 358.86 -6.06N 11 0 0 65 33 47.9 21 51 11 11 129 5.36 21.7 358.88 -6.08N 11 15 0 65 30 35.8 21 51 15 11 129 5.30 21.7 358.90 -6.10N 11 30 0 65 27 22.4 21 51 18 11 130 5.24 21.7 358.92 -6.12N 11 45 0 65 24 7.7 21 51 22 11 130 5.18 21.7 358.94 -6.14N 12 0 0 65 20 51.7 21 51 25 11 130 5.12 21.7 358.96 -6.16N 12 15 0 65 17 34.3 21 51 29 11 130 5.06 21.8 358.99 -6.18N 12 30 0 65 14 15.6 21 51 32 11 131 5.01 21.8 359.01 -6.21N 12 45 0 65 10 55.5 21 51 36 11 131 4.95 21.8 359.03 -6.23N 13 0 0 65 7 34.0 21 51 40 12 131 4.90 21.8 359.05 -6.25N 13 15 0 65 4 11.2 21 51 44 12 131 4.85 21.9 359.07 -6.27N 13 30 0 65 0 47.1 21 51 48 12 132 4.80 21.9 359.09 -6.29N 13 45 0 64 57 21.5 21 51 52 12 132 4.75 21.9 359.11 -6.31N 14 0 0 64 53 54.6 21 51 56 12 132 4.70 21.9 359.14 -6.34N 14 15 0 64 50 26.2 21 52 0 12 132 4.65 21.9 359.16 -6.36N 14 30 0 64 46 56.5 21 52 4 12 133 4.60 22.0 359.18 -6.38N 14 45 0 64 43 25.3 21 52 8 12 133 4.55 22.0 359.20 -6.40N 15 0 0 64 39 52.7 21 52 12 13 133 4.50 22.0 359.22 -6.42N 15 15 0 64 36 18.7 21 52 17 13 133 4.46 22.0 359.25 -6.45N 15 30 0 64 32 43.3 21 52 21 13 134 4.41 22.1 359.27 -6.47N 15 45 0 64 29 6.4 21 52 26 13 134 4.37 22.1 359.29 -6.49N 16 0 0 64 25 28.1 21 52 30 13 134 4.32 22.1 359.31 -6.51N 16 15 0 64 21 48.5 21 52 35 13 134 4.28 22.1 359.34 -6.54N 16 30 0 64 18 7.3 21 52 39 13 135 4.24 22.1 359.36 -6.56N 16 45 0 64 14 24.6 21 52 44 13 135 4.20 22.2 359.38 -6.58N 17 0 0 64 10 40.4 21 52 49 14 135 4.16 22.2 359.41 -6.61N 17 15 0 64 6 54.7 21 52 54 14 135 4.12 22.2 359.43 -6.63N 17 30 0 64 3 7.6 21 52 59 14 136 4.08 22.2 359.45 -6.65N 17 45 0 63 59 19.0 21 53 4 14 136 4.04 22.3 359.47 -6.67N 18 0 0 63 55 28.8 21 53 9 14 136 4.00 22.3 359.50 -6.70N 18 15 0 63 51 37.2 21 53 14 14 136 3.96 22.3 359.52 -6.72N 18 30 0 63 47 44.0 21 53 20 14 137 3.92 22.3 359.54 -6.74N 18 45 0 63 43 49.3 21 53 25 14 137 3.88 22.4 359.57 -6.77N 19 0 0 63 39 53.1 21 53 30 15 137 3.85 22.4 359.59 -6.79N 19 15 0 63 35 55.3 21 53 36 15 137 3.81 22.4 359.61 -6.82N 19 30 0 63 31 56.0 21 53 42 15 138 3.78 22.4 359.64 -6.84N 19 45 0 63 27 55.1 21 53 47 15 138 3.74 22.4 359.66 -6.86N 20 0 0 63 23 53.9 21 53 53 15 138 3.71 22.5 359.69 -6.89N 20 15 0 63 19 49.8 21 53 59 15 138 3.67 22.5 359.71 -6.91N 20 30 0 63 15 44.2 21 54 5 15 139 3.64 22.5 359.73 -6.93N 20 45 0 63 11 36.9 21 54 11 15 139 3.61 22.5 359.76 -6.96N 21 0 0 63 7 28.1 21 54 17 16 139 3.57 22.6 359.78 -6.98N 21 15 0 63 3 17.6 21 54 23 16 139 3.54 22.6 359.81 -7.01N 21 30 0 62 59 5.6 21 54 29 16 140 3.51 22.6 359.83 -7.03N 21 45 0 62 54 51.8 21 54 36 16 140 3.48 22.6 359.86 -7.06N 22 0 0 62 50 36.5 21 54 42 16 140 3.45 22.7 359.88 -7.08N 22 15 0 62 46 19.5 21 54 49 16 141 3.42 22.7 359.90 -7.11N 22 30 0 62 42 0.9 21 54 55 16 141 3.39 22.7 359.93 -7.13N 22 45 0 62 37 40.6 21 55 2 17 141 3.36 22.7 359.95 -7.15N 23 0 0 62 33 18.6 21 55 9 17 141 3.33 22.8 359.98 -7.18N 23 15 0 62 28 55.0 21 55 15 17 142 3.30 22.8 0.00 -7.20N 23 30 0 62 24 29.7 21 55 22 17 142 3.27 22.8 0.03 -7.23N 23 45 0 62 20 2.7 21 55 30 17 142 3.24 22.8 0.05 -7.25N 24 0 0 62 15 33.6 21 55 37 17 142 3.22 22.9 0.08 -7.28N 24 15 0 62 11 3.2 21 55 44 17 143 3.19 22.9 0.10 -7.30N 24 30 0 62 6 31.1 21 55 51 18 143 3.16 22.9 0.13 -7.33N 24 45 0 62 1 57.2 21 55 59 18 143 3.13 22.9 0.15 -7.36N 25 0 0 61 57 21.7 21 56 6 18 143 3.11 23.0 0.18 -7.38N 25 15 0 61 52 44.4 21 56 14 18 144 3.08 23.0 0.20 -7.41N 25 30 0 61 48 5.3 21 56 22 18 144 3.06 23.0 0.23 -7.43N 25 45 0 61 43 24.5 21 56 30 18 144 3.03 23.0 0.26 -7.46N 26 0 0 61 38 41.9 21 56 38 18 145 3.01 23.1 0.28 -7.48N 26 15 0 61 33 57.6 21 56 46 19 145 2.98 23.1 0.31 -7.51N 26 30 0 61 29 11.5 21 56 54 19 145 2.96 23.1 0.33 -7.54N 26 45 0 61 24 23.7 21 57 2 19 145 2.93 23.1 0.36 -7.56N 27 0 0 61 19 34.0 21 57 10 19 146 2.91 23.2 0.38 -7.59N 27 15 0 61 14 42.5 21 57 19 19 146 2.88 23.2 0.41 -7.61N 27 30 0 61 9 49.2 21 57 28 19 146 2.86 23.2 0.44 -7.64N 27 45 0 61 4 54.1 21 57 36 19 146 2.84 23.2 0.46 -7.67N 28 0 0 60 59 57.2 21 57 45 20 147 2.81 23.3 0.49 -7.69N 28 15 0 60 54 58.4 21 57 54 20 147 2.79 23.3 0.52 -7.72N 28 30 0 60 49 57.7 21 58 3 20 147 2.77 23.3 0.54 -7.75N 28 45 0 60 44 55.3 21 58 12 20 148 2.75 23.4 0.57 -7.77N 29 0 0 60 39 50.9 21 58 22 20 148 2.73 23.4 0.60 -7.80N 29 15 0 60 34 44.7 21 58 31 20 148 2.70 23.4 0.62 -7.83N 29 30 0 60 29 36.6 21 58 41 20 148 2.68 23.4 0.65 -7.85N 29 45 0 60 24 26.6 21 58 50 21 149 2.66 23.5 0.68 -7.88N 30 0 0 60 19 14.7 21 59 0 21 149 2.64 23.5 0.70 -7.91N 30 15 0 60 14 1.0 21 59 10 21 149 2.62 23.5 0.73 -7.93N 30 30 0 60 8 45.3 21 59 20 21 150 2.60 23.5 0.76 -7.96N 30 45 0 60 3 27.7 21 59 30 21 150 2.58 23.6 0.78 -7.99N 31 0 0 59 58 8.1 21 59 40 21 150 2.56 23.6 0.81 -8.01N 31 15 0 59 52 46.7 21 59 51 21 150 2.54 23.6 0.84 -8.04N 31 30 0 59 47 23.3 22 0 1 22 151 2.52 23.7 0.87 -8.07N 31 45 0 59 41 58.0 22 0 12 22 151 2.50 23.7 0.89 -8.10N 32 0 0 59 36 30.7 22 0 23 22 151 2.48 23.7 0.92 -8.12N 32 15 0 59 31 1.4 22 0 34 22 152 2.46 23.7 0.95 -8.15N 32 30 0 59 25 30.1 22 0 45 22 152 2.44 23.8 0.97 -8.18N 32 45 0 59 19 56.9 22 0 56 22 152 2.42 23.8 1.00 -8.21N 33 0 0 59 14 21.7 22 1 7 23 152 2.41 23.8 1.03 -8.23N 33 15 0 59 8 44.5 22 1 19 23 153 2.39 23.8 1.06 -8.26N 33 30 0 59 3 5.3 22 1 31 23 153 2.37 23.9 1.08 -8.29N 33 45 0 58 57 24.1 22 1 42 23 153 2.35 23.9 1.11 -8.32N 34 0 0 58 51 40.9 22 1 54 23 154 2.34 23.9 1.14 -8.34N 34 15 0 58 45 55.7 22 2 6 23 154 2.32 24.0 1.17 -8.37N 34 30 0 58 40 8.4 22 2 19 23 154 2.30 24.0 1.20 -8.40N 34 45 0 58 34 19.2 22 2 31 24 154 2.28 24.0 1.22 -8.43N 35 0 0 58 28 27.8 22 2 43 24 155 2.27 24.0 1.25 -8.46N 35 15 0 58 22 34.5 22 2 56 24 155 2.25 24.1 1.28 -8.48N 35 30 0 58 16 39.1 22 3 9 24 155 2.23 24.1 1.31 -8.51N 35 45 0 58 10 41.6 22 3 22 24 156 2.22 24.1 1.33 -8.54N 36 0 0 58 4 42.1 22 3 35 24 156 2.20 24.1 1.36 -8.57N 36 15 0 57 58 40.4 22 3 48 25 156 2.18 24.2 1.39 -8.60N 36 30 0 57 52 36.8 22 4 2 25 157 2.17 24.2 1.42 -8.62N 36 45 0 57 46 31.0 22 4 15 25 157 2.15 24.2 1.45 -8.65N 37 0 0 57 40 23.1 22 4 29 25 157 2.14 24.3 1.47 -8.68N 37 15 0 57 34 13.2 22 4 43 25 158 2.12 24.3 1.50 -8.71N 37 30 0 57 28 1.1 22 4 57 25 158 2.11 24.3 1.53 -8.74N 37 45 0 57 21 47.0 22 5 11 26 158 2.09 24.3 1.56 -8.76N 38 0 0 57 15 30.7 22 5 26 26 159 2.08 24.4 1.59 -8.79N 38 15 0 57 9 12.4 22 5 41 26 159 2.06 24.4 1.61 -8.82N 38 30 0 57 2 51.9 22 5 55 26 159 2.05 24.4 1.64 -8.85N 38 45 0 56 56 29.3 22 6 10 26 159 2.03 24.5 1.67 -8.88N 39 0 0 56 50 4.6 22 6 25 26 160 2.02 24.5 1.70 -8.90N 39 15 0 56 43 37.8 22 6 41 27 160 2.01 24.5 1.73 -8.93N 39 30 0 56 37 8.8 22 6 56 27 160 1.99 24.5 1.75 -8.96N 39 45 0 56 30 37.8 22 7 12 27 161 1.98 24.6 1.78 -8.99N 40 0 0 56 24 4.5 22 7 28 27 161 1.96 24.6 1.81 -9.02N 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 1 meters [Estimated] 1924 is double: AB 5.8 0.020" 245.0 (66 Vir) Graze path of B approximately 0.0 km north, and 0.0 secs earlier compared to A - refer to graze profile for exact distances Librations Long +3.75 Lat -4.37 P -0.12 D +4.64 Illumination of moon 94%- Elongation of Moon 153 Vertical Profile Scale approx. 2.99 km/arcsec at mean distance of moon Horizontal Scale Factor 1.64 deg/min At longitude 25.00: Limiting Magnitudes for various telescope apertures (in cm) CA\Tdia 5 10 15 20 25 30 35 -11.4 2.1 3.4 4.1 4.4 4.6 4.8 4.9 -9.4 2.1 3.4 4.1 4.4 4.6 4.8 4.9 -7.4 2.1 3.4 4.1 4.4 4.6 4.8 4.9 -5.4 2.1 3.4 4.1 4.4 4.6 4.8 4.9 -3.4 2.1 3.4 4.1 4.4 4.6 4.8 4.9 ------------------------------------------------------------------------------ Double star catalogue details Interferometric catalogue entries 132433.14-050950.1 HR 5050 66 Vir HD 116568 HIP 65420 13246-05 Date PA Sep M1 M2 N O 1988.163 . . < 0.038 . . . . . 549 22 3.6 1 McA1993 S 1991.25 . . O . . 5.76 . . . 511 0.3 1 HIP1997g H 2008.637 . . U . . . . . . 2180 350 8.2 1 Ehr2010 A ------------------------------------------------------------------------------ Results of Observer Scan UT Site Long. Lat. Dist. h m s Ähtäri 24.1 62.6 30km 21 55 39.5 Artjärvi Tähtikallio 26.2 60.7 78km 21 56 44.5 Forssa 23.6 60.8 148km 21 55 26.3 Hämeenlinna 24.4 61.0 107km 21 55 49.3 Hamina 27.2 60.6 64km 21 57 17.4 Hartola 26.0 61.6 6km 21 56 38.3 Helsinki Kaivopuisto 25.0 60.2 171km 21 56 5.1 Imatra 28.8 61.2 44km 21 58 13.4 Järvenpää 25.1 60.5 136km 21 56 9.2 Joensuu Jakokoski 30.0 62.7 212km 21 58 59.8 Jyväskylä Rihlaperä 25.7 62.2 45km 21 56 28.2 Kangasala 24.0 61.4 80km 21 55 36.8 Kokkola 23.1 63.8 121km 21 55 12.3 Kuopio Huuhanmäki 27.6 62.9 159km 21 57 32.8 Lahti Pirttiharju 25.6 61.0 74km 21 56 24.6 Lappeenranta 28.2 61.1 11km 21 57 52.0 Loimaa 23.1 60.8 161km 21 55 10.1 Loviisa 26.2 60.5 104km 21 56 44.8 Mäntyharju 26.9 61.4 5km 21 57 6.7 Merikarvia 21.5 61.9 107km 21 54 29.5 Mikkeli Kiiskinmäki 27.2 61.7 40km 21 57 18.7 Nilsiä 28.1 63.2 199km 21 57 48.3 Pirkkola 24.9 60.2 165km 21 56 3.6 Pori 21.8 61.5 134km 21 54 37.0 Porvoo 25.7 60.4 127km 21 56 28.0 Rautalampi 26.7 62.6 104km 21 57 0.5 Salo 23.1 60.4 203km 21 55 12.4 Savonlinna 28.9 61.9 104km 21 58 17.1 Siuntio 24.2 60.2 192km 21 55 42.5 Tampere Kauppi 23.8 61.5 76km 21 55 30.9 Turku Isoheikkilä 22.2 60.5 223km 21 54 48.1 Ulvila Vesitorni 21.9 61.4 136km 21 54 40.2 Vaasa Sundom 21.6 63.0 7km 21 54 31.4 Vantaa 25.0 60.3 155km 21 56 5.8 Varkaus 27.9 62.3 115km 21 57 41.0