Grazing Occultation of 1277wK3 Magnitude 5.3 [Red = 4.7] R1277 = eta Cancri Date: 2020 Mar 06 18h 18m, to 2020 Mar 06 18h 44m 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 43 1.7 18 17 50 -10 38 131 1.27 189.1 173.42 7.41S 10 15 0 65 43 50.2 18 18 2 -10 38 132 1.27 189.1 173.44 7.39S 10 30 0 65 44 37.6 18 18 14 -10 38 132 1.27 189.1 173.46 7.37S 10 45 0 65 45 23.7 18 18 25 -10 38 132 1.26 189.1 173.49 7.34S 11 0 0 65 46 8.6 18 18 37 -10 38 133 1.26 189.1 173.51 7.32S 11 15 0 65 46 52.3 18 18 49 -10 39 133 1.26 189.2 173.53 7.30S 11 30 0 65 47 34.8 18 19 0 -10 39 133 1.25 189.2 173.56 7.27S 11 45 0 65 48 16.0 18 19 12 -10 39 134 1.25 189.2 173.58 7.25S 12 0 0 65 48 56.1 18 19 24 -11 39 134 1.24 189.2 173.61 7.22S 12 15 0 65 49 34.9 18 19 36 -11 39 134 1.24 189.3 173.63 7.20S 12 30 0 65 50 12.6 18 19 47 -11 39 135 1.24 189.3 173.65 7.18S 12 45 0 65 50 49.0 18 19 59 -11 39 135 1.23 189.3 173.68 7.15S 13 0 0 65 51 24.2 18 20 11 -11 39 135 1.23 189.3 173.70 7.13S 13 15 0 65 51 58.2 18 20 23 -11 39 136 1.23 189.4 173.72 7.10S 13 30 0 65 52 31.0 18 20 35 -11 39 136 1.22 189.4 173.75 7.08S 13 45 0 65 53 2.6 18 20 47 -11 39 136 1.22 189.4 173.77 7.06S 14 0 0 65 53 32.9 18 20 58 -11 39 137 1.22 189.4 173.80 7.03S 14 15 0 65 54 2.1 18 21 10 -12 40 137 1.21 189.5 173.82 7.01S 14 30 0 65 54 30.0 18 21 22 -12 40 137 1.21 189.5 173.84 6.99S 14 45 0 65 54 56.7 18 21 34 -12 40 138 1.21 189.5 173.87 6.96S 15 0 0 65 55 22.3 18 21 46 -12 40 138 1.20 189.5 173.89 6.94S 15 15 0 65 55 46.6 18 21 58 40 139 1.20 189.6 173.92 6.91S 15 30 0 65 56 9.7 18 22 10 40 139 1.20 189.6 173.94 6.89S 15 45 0 65 56 31.6 18 22 22 40 139 1.19 189.6 173.96 6.86S 16 0 0 65 56 52.3 18 22 34 40 140 1.19 189.6 173.99 6.84S 16 15 0 65 57 11.8 18 22 46 40 140 1.19 189.7 174.01 6.82S 16 30 0 65 57 30.1 18 22 58 40 140 1.18 189.7 174.04 6.79S 16 45 0 65 57 47.2 18 23 10 40 141 1.18 189.7 174.06 6.77S 17 0 0 65 58 3.1 18 23 22 40 141 1.18 189.7 174.09 6.74S 17 15 0 65 58 17.7 18 23 34 40 141 1.17 189.7 174.11 6.72S 17 30 0 65 58 31.2 18 23 46 40 142 1.17 189.8 174.13 6.70S 17 45 0 65 58 43.4 18 23 59 41 142 1.17 189.8 174.16 6.67S 18 0 0 65 58 54.4 18 24 11 41 142 1.17 189.8 174.18 6.65S 18 15 0 65 59 4.3 18 24 23 41 143 1.16 189.8 174.21 6.62S 18 30 0 65 59 12.9 18 24 35 41 143 1.16 189.9 174.23 6.60S 18 45 0 65 59 20.3 18 24 47 41 144 1.16 189.9 174.26 6.57S 19 0 0 65 59 26.4 18 25 0 41 144 1.15 189.9 174.28 6.55S 19 15 0 65 59 31.4 18 25 12 41 144 1.15 189.9 174.31 6.52S 19 30 0 65 59 35.2 18 25 24 41 145 1.15 190.0 174.33 6.50S 19 45 0 65 59 37.7 18 25 36 41 145 1.14 190.0 174.35 6.48S 20 0 0 65 59 39.1 18 25 49 41 145 1.14 190.0 174.38 6.45S 20 15 0 65 59 39.2 18 26 1 41 146 1.14 190.0 174.40 6.43S 20 30 0 65 59 38.1 18 26 13 41 146 1.14 190.1 174.43 6.40S 20 45 0 65 59 35.8 18 26 26 41 146 1.13 190.1 174.45 6.38S 21 0 0 65 59 32.3 18 26 38 41 147 1.13 190.1 174.48 6.35S 21 15 0 65 59 27.5 18 26 51 42 147 1.13 190.1 174.50 6.33S 21 30 0 65 59 21.5 18 27 3 42 148 1.13 190.2 174.53 6.30S 21 45 0 65 59 14.3 18 27 15 42 148 1.12 190.2 174.55 6.28S 22 0 0 65 59 5.9 18 27 28 42 148 1.12 190.2 174.58 6.25S 22 15 0 65 58 56.3 18 27 40 42 149 1.12 190.2 174.60 6.23S 22 30 0 65 58 45.4 18 27 53 42 149 1.11 190.3 174.63 6.20S 22 45 0 65 58 33.3 18 28 6 42 149 1.11 190.3 174.65 6.18S 23 0 0 65 58 19.9 18 28 18 42 150 1.11 190.3 174.68 6.15S 23 15 0 65 58 5.4 18 28 31 42 150 1.11 190.3 174.70 6.13S 23 30 0 65 57 49.6 18 28 43 42 151 1.10 190.4 174.73 6.10S 23 45 0 65 57 32.5 18 28 56 42 151 1.10 190.4 174.75 6.08S 24 0 0 65 57 14.3 18 29 9 42 151 1.10 190.4 174.78 6.05S 24 15 0 65 56 54.7 18 29 21 42 152 1.10 190.4 174.80 6.03S 24 30 0 65 56 34.0 18 29 34 42 152 1.09 190.5 174.83 6.00S 24 45 0 65 56 12.0 18 29 47 42 152 1.09 190.5 174.85 5.98S 25 0 0 65 55 48.7 18 29 59 43 153 1.09 190.5 174.88 5.95S 25 15 0 65 55 24.2 18 30 12 43 153 1.09 190.5 174.90 5.93S 25 30 0 65 54 58.5 18 30 25 43 154 1.08 190.6 174.93 5.90S 25 45 0 65 54 31.5 18 30 38 43 154 1.08 190.6 174.95 5.88S 26 0 0 65 54 3.3 18 30 51 43 154 1.08 190.6 174.98 5.85S 26 15 0 65 53 33.7 18 31 4 43 155 1.08 190.6 175.00 5.83S 26 30 0 65 53 3.0 18 31 16 43 155 1.08 190.7 175.03 5.80S 26 45 0 65 52 31.0 18 31 29 43 155 1.07 190.7 175.05 5.78S 27 0 0 65 51 57.7 18 31 42 43 156 1.07 190.7 175.08 5.75S 27 15 0 65 51 23.1 18 31 55 43 156 1.07 190.7 175.11 5.72S 27 30 0 65 50 47.3 18 32 8 43 157 1.07 190.8 175.13 5.70S 27 45 0 65 50 10.2 18 32 21 43 157 1.06 190.8 175.16 5.67S 28 0 0 65 49 31.8 18 32 34 43 157 1.06 190.8 175.18 5.65S 28 15 0 65 48 52.2 18 32 47 43 158 1.06 190.8 175.21 5.62S 28 30 0 65 48 11.2 18 33 1 43 158 1.06 190.9 175.23 5.60S 28 45 0 65 47 29.0 18 33 14 43 158 1.06 190.9 175.26 5.57S 29 0 0 65 46 45.5 18 33 27 44 159 1.05 190.9 175.29 5.55S 29 15 0 65 46 0.7 18 33 40 44 159 1.05 191.0 175.31 5.52S 29 30 0 65 45 14.7 18 33 53 44 160 1.05 191.0 175.34 5.49S 29 45 0 65 44 27.3 18 34 7 44 160 1.05 191.0 175.36 5.47S 30 0 0 65 43 38.6 18 34 20 44 160 1.05 191.0 175.39 5.44S 30 15 0 65 42 48.6 18 34 33 44 161 1.04 191.1 175.41 5.42S 30 30 0 65 41 57.4 18 34 47 44 161 1.04 191.1 175.44 5.39S 30 45 0 65 41 4.8 18 35 0 44 162 1.04 191.1 175.47 5.36S 31 0 0 65 40 10.9 18 35 13 44 162 1.04 191.1 175.49 5.34S 31 15 0 65 39 15.7 18 35 27 44 162 1.04 191.2 175.52 5.31S 31 30 0 65 38 19.1 18 35 40 44 163 1.03 191.2 175.54 5.29S 31 45 0 65 37 21.3 18 35 54 44 163 1.03 191.2 175.57 5.26S 32 0 0 65 36 22.1 18 36 7 44 164 1.03 191.2 175.60 5.23S 32 15 0 65 35 21.6 18 36 21 44 164 1.03 191.3 175.62 5.21S 32 30 0 65 34 19.7 18 36 34 44 164 1.03 191.3 175.65 5.18S 32 45 0 65 33 16.5 18 36 48 44 165 1.02 191.3 175.68 5.15S 33 0 0 65 32 11.9 18 37 2 44 165 1.02 191.3 175.70 5.13S 33 15 0 65 31 6.1 18 37 15 44 166 1.02 191.4 175.73 5.10S 33 30 0 65 29 58.8 18 37 29 44 166 1.02 191.4 175.76 5.08S 33 45 0 65 28 50.2 18 37 43 45 166 1.02 191.4 175.78 5.05S 34 0 0 65 27 40.3 18 37 57 45 167 1.02 191.4 175.81 5.02S 34 15 0 65 26 28.9 18 38 10 45 167 1.01 191.5 175.83 5.00S 34 30 0 65 25 16.2 18 38 24 45 168 1.01 191.5 175.86 4.97S 34 45 0 65 24 2.2 18 38 38 45 168 1.01 191.5 175.89 4.94S 35 0 0 65 22 46.7 18 38 52 45 168 1.01 191.6 175.91 4.92S 35 15 0 65 21 29.9 18 39 6 45 169 1.01 191.6 175.94 4.89S 35 30 0 65 20 11.6 18 39 20 45 169 1.01 191.6 175.97 4.86S 35 45 0 65 18 52.0 18 39 34 45 170 1.00 191.6 175.99 4.84S 36 0 0 65 17 31.0 18 39 48 45 170 1.00 191.7 176.02 4.81S 36 15 0 65 16 8.6 18 40 2 45 170 1.00 191.7 176.05 4.78S 36 30 0 65 14 44.7 18 40 16 45 171 1.00 191.7 176.08 4.76S 36 45 0 65 13 19.5 18 40 30 45 171 1.00 191.7 176.10 4.73S 37 0 0 65 11 52.8 18 40 45 45 172 1.00 191.8 176.13 4.70S 37 15 0 65 10 24.7 18 40 59 45 172 0.99 191.8 176.16 4.67S 37 30 0 65 8 55.2 18 41 13 45 172 0.99 191.8 176.18 4.65S 37 45 0 65 7 24.3 18 41 27 45 173 0.99 191.9 176.21 4.62S 38 0 0 65 5 51.9 18 41 42 45 173 0.99 191.9 176.24 4.59S 38 15 0 65 4 18.0 18 41 56 45 174 0.99 191.9 176.26 4.57S 38 30 0 65 2 42.7 18 42 11 45 174 0.99 191.9 176.29 4.54S 38 45 0 65 1 6.0 18 42 25 45 174 0.99 192.0 176.32 4.51S 39 0 0 64 59 27.7 18 42 40 45 175 0.98 192.0 176.35 4.48S 39 15 0 64 57 48.0 18 42 54 45 175 0.98 192.0 176.37 4.46S 39 30 0 64 56 6.8 18 43 9 46 176 0.98 192.0 176.40 4.43S 39 45 0 64 54 24.2 18 43 23 46 176 0.98 192.1 176.43 4.40S 40 0 0 64 52 40.0 18 43 38 46 176 0.98 192.1 176.46 4.37S 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 6 meters [Estimated] 1277 is double: AB 5.3 20.0 164" 280.0 (ZHN 3) Graze path of B approximately 3.9 km north, and 331.7 secs earlier compared to A - refer to graze profile for exact distances C A S S I N I R E G I O N G R A Z E Librations Long -6.31 Lat -2.63 P +175.16 D -2.92 Illumination of moon 88%+ Elongation of Moon 139 Vertical Profile Scale approx. 2.55 km/arcsec at mean distance of moon Horizontal Scale Factor 1.75 deg/min At longitude 25.00: Limiting Magnitudes for various telescope apertures (in cm) CA\Tdia 5 10 15 20 25 30 35 2.0 2.5 3.9 4.7 5.2 5.5 5.7 5.8 4.0 3.2 4.6 5.4 5.8 6.2 6.4 6.5 6.0 4.5 6.0 6.7 7.2 7.5 7.8 7.9 8.0 4.6 6.0 6.8 7.2 7.6 7.8 8.0 10.0 4.8 6.2 7.0 7.5 7.8 8.1 8.2 ------------------------------------------------------------------------------ Double star catalogue details WDS entries RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2 08327+2026ZHN 3 2004 2004 1 280 280 164.2 164.2 5.33 20. K3III+L3 -046-044 -047-039 +20 2109 N 083242.50+202627.7 ------------------------------------------------ Interferometric catalogue entries 083242.50+202627.7 eta Cnc ZHN 3 HD 72292 HIP 41909 08327+20 Date PA Sep M1 M2 N 1998.827 . . . . 3.49 0.03 . . 1256 245 1.3 1 Zhn2010 E 1998.827 . . . . 2.86 0.21 . . 1633 160 1.3 1 Zhn2010 E 1998.827 . . . . 2.70 0.32 . . 2210 300 1.3 1 Zhn2010 E 2004.2879 280. . 164.16 . . . s25.37 0.63 623 280 2.5 1 Zhn2010 E 2004.2879 . . . . . . s22.13 0.17 762 300 2.5 1 Zhn2010 E 2004.2879 . . . . . . s20.15 0.12 913 240 2.5 1 Zhn2010 E 2007. . . . . . . s19.69 0.09 878 95 3.8 1 Zhn2010 E 2007. . . . . . . s18.66 0.05 1020 100 3.8 1 Zhn2010 E 2007. . . . . . . s17.74 0.04 1250 160 3.8 1 Zhn2010 E 2007. . . . . . . s17.16 0.04 1635 290 3.8 1 Zhn2010 E 2007. . . . . . . s16.52 0.04 2200 340 3.8 1 Zhn2010 E ------------------------------------------------------------------------------ Results of Observer Scan UT Site Long. Lat. Dist. h m s Bodø 14.4 67.3 152km 18 21 17.8 Kajaani Lehtikangas 27.7 64.2 179km 18 32 20.9 Kalajoki 23.9 64.3 189km 18 29 5.5 Kemijärvi 27.4 66.7 96km 18 32 5.1 Kihlanki 23.6 67.6 180km 18 28 46.3 Kittilä 24.9 67.7 190km 18 29 54.4 Kolari 23.8 67.3 152km 18 28 57.9 Kuhmo 29.5 64.1 179km 18 33 53.9 Kuusamo 29.2 66.0 21km 18 33 37.2 Meltaus 25.4 66.9 110km 18 30 18.0 Oulainen 24.8 64.3 185km 18 29 49.6 Oulu Puolivälikangas 25.5 65.0 97km 18 30 24.3 Pello 24.0 66.8 91km 18 29 6.9 Posio 28.2 66.1 32km 18 32 43.2 Pudasjärvi 27.0 65.4 56km 18 31 41.7 Puolanka 27.7 64.9 107km 18 32 17.4 Raahe 24.5 64.7 139km 18 29 32.9 Ranua 26.5 65.9 5km 18 31 16.9 Rovaniemi 25.7 66.5 65km 18 30 36.8 Salla 28.7 66.8 114km 18 33 9.2 Savukoski 28.2 67.3 163km 18 32 43.4 Skellfteå 20.9 64.8 138km 18 26 34.2 Sodankylä 26.6 67.4 169km 18 31 21.4 Suomussalmi 28.9 64.9 99km 18 33 22.0 Taivalkoski 28.3 65.6 27km 18 32 47.6 Tervola 24.8 66.1 16km 18 29 49.4 Tornio 24.1 65.8 11km 18 29 15.9 Ylitornio 23.7 66.3 39km 18 28 51.9