Grazing Occultation of 946DM3 Magnitude 3.5 [Red = 2.5] V R946 = Propus = eta Geminorum Date: 2020 Mar 31 18h 54m, to 2020 Mar 31 19h 17m 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 71 24 39.7 18 54 17 -3 38 215 1.26 177.9 174.80 3.76S 10 15 0 71 23 28.4 18 54 28 -3 38 215 1.26 177.9 174.82 3.74S 10 30 0 71 22 15.9 18 54 38 -3 38 216 1.27 178.0 174.84 3.72S 10 45 0 71 21 2.4 18 54 49 -3 38 216 1.27 178.0 174.86 3.70S 11 0 0 71 19 47.7 18 55 0 -3 38 217 1.27 178.0 174.88 3.68S 11 15 0 71 18 31.9 18 55 11 -3 38 217 1.27 178.0 174.90 3.66S 11 30 0 71 17 15.0 18 55 21 -3 38 217 1.27 178.0 174.92 3.64S 11 45 0 71 15 57.0 18 55 32 -3 38 218 1.28 178.1 174.93 3.62S 12 0 0 71 14 37.8 18 55 43 -3 38 218 1.28 178.1 174.95 3.60S 12 15 0 71 13 17.5 18 55 54 -4 38 218 1.28 178.1 174.97 3.58S 12 30 0 71 11 56.1 18 56 4 -4 38 219 1.28 178.1 174.99 3.56S 12 45 0 71 10 33.5 18 56 15 -4 38 219 1.28 178.1 175.01 3.55S 13 0 0 71 9 9.7 18 56 26 -4 38 219 1.29 178.2 175.03 3.53S 13 15 0 71 7 44.8 18 56 37 -4 38 220 1.29 178.2 175.05 3.51S 13 30 0 71 6 18.8 18 56 48 -4 38 220 1.29 178.2 175.07 3.49S 13 45 0 71 4 51.5 18 56 59 -4 38 220 1.29 178.2 175.09 3.47S 14 0 0 71 3 23.1 18 57 9 -4 38 221 1.29 178.2 175.11 3.45S 14 15 0 71 1 53.6 18 57 20 -4 38 221 1.30 178.3 175.13 3.43S 14 30 0 71 0 22.8 18 57 31 -4 38 221 1.30 178.3 175.15 3.41S 14 45 0 70 58 50.9 18 57 42 -5 38 222 1.30 178.3 175.17 3.39S 15 0 0 70 57 17.8 18 57 53 -5 38 222 1.30 178.3 175.19 3.37S 15 15 0 70 55 43.5 18 58 4 -5 37 222 1.30 178.3 175.21 3.35S 15 30 0 70 54 8.0 18 58 15 -5 37 223 1.31 178.3 175.23 3.33S 15 45 0 70 52 31.3 18 58 26 -5 37 223 1.31 178.4 175.24 3.31S 16 0 0 70 50 53.4 18 58 37 -5 37 224 1.31 178.4 175.26 3.29S 16 15 0 70 49 14.2 18 58 48 -5 37 224 1.31 178.4 175.28 3.27S 16 30 0 70 47 33.9 18 58 59 -5 37 224 1.32 178.4 175.30 3.25S 16 45 0 70 45 52.3 18 59 10 -5 37 225 1.32 178.4 175.32 3.24S 17 0 0 70 44 9.5 18 59 21 -5 37 225 1.32 178.5 175.34 3.22S 17 15 0 70 42 25.5 18 59 32 -6 37 225 1.32 178.5 175.36 3.20S 17 30 0 70 40 40.2 18 59 43 -6 37 226 1.32 178.5 175.38 3.18S 17 45 0 70 38 53.7 18 59 54 -6 37 226 1.33 178.5 175.40 3.16S 18 0 0 70 37 5.9 19 0 5 -6 37 226 1.33 178.5 175.42 3.14S 18 15 0 70 35 16.9 19 0 16 -6 37 227 1.33 178.6 175.44 3.12S 18 30 0 70 33 26.6 19 0 27 -6 37 227 1.33 178.6 175.46 3.10S 18 45 0 70 31 35.1 19 0 38 -6 37 227 1.34 178.6 175.48 3.08S 19 0 0 70 29 42.3 19 0 49 -6 37 228 1.34 178.6 175.50 3.06S 19 15 0 70 27 48.2 19 1 1 -6 37 228 1.34 178.6 175.52 3.04S 19 30 0 70 25 52.7 19 1 12 -6 37 228 1.34 178.7 175.54 3.02S 19 45 0 70 23 56.1 19 1 23 -7 37 229 1.35 178.7 175.56 3.00S 20 0 0 70 21 58.1 19 1 34 -7 37 229 1.35 178.7 175.58 2.98S 20 15 0 70 19 58.8 19 1 45 -7 36 229 1.35 178.7 175.60 2.96S 20 30 0 70 17 58.2 19 1 57 -7 36 230 1.36 178.7 175.62 2.94S 20 45 0 70 15 56.2 19 2 8 -7 36 230 1.36 178.8 175.64 2.92S 21 0 0 70 13 53.0 19 2 19 -7 36 230 1.36 178.8 175.66 2.90S 21 15 0 70 11 48.4 19 2 30 -7 36 231 1.36 178.8 175.68 2.88S 21 30 0 70 9 42.5 19 2 42 -7 36 231 1.37 178.8 175.70 2.86S 21 45 0 70 7 35.3 19 2 53 -7 36 231 1.37 178.8 175.72 2.84S 22 0 0 70 5 26.7 19 3 4 -7 36 232 1.37 178.9 175.74 2.82S 22 15 0 70 3 16.7 19 3 16 -8 36 232 1.38 178.9 175.76 2.80S 22 30 0 70 1 5.4 19 3 27 -8 36 233 1.38 178.9 175.78 2.78S 22 45 0 69 58 52.8 19 3 38 -8 36 233 1.38 178.9 175.80 2.76S 23 0 0 69 56 38.7 19 3 50 -8 36 233 1.38 178.9 175.82 2.74S 23 15 0 69 54 23.3 19 4 1 -8 36 234 1.39 179.0 175.84 2.72S 23 30 0 69 52 6.5 19 4 13 -8 36 234 1.39 179.0 175.86 2.70S 23 45 0 69 49 48.3 19 4 24 -8 36 234 1.39 179.0 175.88 2.68S 24 0 0 69 47 28.7 19 4 36 -8 36 235 1.40 179.0 175.90 2.66S 24 15 0 69 45 7.6 19 4 47 -8 36 235 1.40 179.0 175.92 2.64S 24 30 0 69 42 45.2 19 4 59 -8 35 235 1.40 179.1 175.94 2.62S 24 45 0 69 40 21.4 19 5 10 -9 35 236 1.41 179.1 175.96 2.60S 25 0 0 69 37 56.1 19 5 22 -9 35 236 1.41 179.1 175.98 2.58S 25 15 0 69 35 29.3 19 5 33 -9 35 236 1.41 179.1 176.00 2.56S 25 30 0 69 33 1.2 19 5 45 -9 35 237 1.42 179.1 176.02 2.54S 25 45 0 69 30 31.6 19 5 56 -9 35 237 1.42 179.2 176.04 2.52S 26 0 0 69 28 0.5 19 6 8 -9 35 237 1.42 179.2 176.06 2.50S 26 15 0 69 25 28.0 19 6 20 -9 35 238 1.43 179.2 176.08 2.48S 26 30 0 69 22 54.0 19 6 31 -9 35 238 1.43 179.2 176.10 2.46S 26 45 0 69 20 18.5 19 6 43 -9 35 238 1.43 179.2 176.12 2.44S 27 0 0 69 17 41.6 19 6 55 -10 35 239 1.44 179.3 176.14 2.42S 27 15 0 69 15 3.1 19 7 6 -10 35 239 1.44 179.3 176.16 2.40S 27 30 0 69 12 23.2 19 7 18 -10 35 239 1.45 179.3 176.18 2.38S 27 45 0 69 9 41.8 19 7 30 -10 35 240 1.45 179.3 176.20 2.36S 28 0 0 69 6 58.8 19 7 42 -10 35 240 1.45 179.3 176.22 2.34S 28 15 0 69 4 14.3 19 7 53 -10 34 240 1.46 179.4 176.24 2.32S 28 30 0 69 1 28.3 19 8 5 -10 34 241 1.46 179.4 176.26 2.30S 28 45 0 68 58 40.8 19 8 17 -10 34 241 1.46 179.4 176.28 2.28S 29 0 0 68 55 51.7 19 8 29 -10 34 241 1.47 179.4 176.30 2.26S 29 15 0 68 53 1.0 19 8 41 -11 34 242 1.47 179.4 176.32 2.24S 29 30 0 68 50 8.8 19 8 53 -11 34 242 1.48 179.5 176.34 2.22S 29 45 0 68 47 15.1 19 9 4 -11 34 242 1.48 179.5 176.36 2.20S 30 0 0 68 44 19.7 19 9 16 -11 34 243 1.48 179.5 176.38 2.18S 30 15 0 68 41 22.8 19 9 28 -11 34 243 1.49 179.5 176.40 2.16S 30 30 0 68 38 24.3 19 9 40 -11 34 244 1.49 179.5 176.42 2.13S 30 45 0 68 35 24.2 19 9 52 -11 34 244 1.50 179.6 176.44 2.11S 31 0 0 68 32 22.5 19 10 4 -11 34 244 1.50 179.6 176.46 2.09S 31 15 0 68 29 19.1 19 10 16 -11 34 245 1.51 179.6 176.48 2.07S 31 30 0 68 26 14.2 19 10 28 -12 34 245 1.51 179.6 176.50 2.05S 31 45 0 68 23 7.6 19 10 40 -12 33 245 1.52 179.7 176.53 2.03S 32 0 0 68 19 59.4 19 10 52 -12 33 246 1.52 179.7 176.55 2.01S 32 15 0 68 16 49.6 19 11 4 -12 33 246 1.52 179.7 176.57 1.99S 32 30 0 68 13 38.1 19 11 17 -12 33 246 1.53 179.7 176.59 1.97S 32 45 0 68 10 24.9 19 11 29 33 247 1.53 179.7 176.61 1.95S 33 0 0 68 7 10.1 19 11 41 33 247 1.54 179.8 176.63 1.93S 33 15 0 68 3 53.6 19 11 53 33 247 1.54 179.8 176.65 1.91S 33 30 0 68 0 35.4 19 12 5 33 248 1.55 179.8 176.67 1.89S 33 45 0 67 57 15.5 19 12 17 33 248 1.55 179.8 176.69 1.87S 34 0 0 67 53 54.0 19 12 29 33 248 1.56 179.8 176.71 1.85S 34 15 0 67 50 30.7 19 12 42 33 249 1.56 179.9 176.73 1.83S 34 30 0 67 47 5.8 19 12 54 33 249 1.57 179.9 176.75 1.81S 34 45 0 67 43 39.1 19 13 6 32 249 1.57 179.9 176.77 1.79S 35 0 0 67 40 10.7 19 13 18 32 250 1.58 179.9 176.79 1.77S 35 15 0 67 36 40.6 19 13 31 32 250 1.58 179.9 176.81 1.75S 35 30 0 67 33 8.7 19 13 43 32 250 1.59 180.0 176.83 1.73S 35 45 0 67 29 35.1 19 13 55 32 251 1.60 180.0 176.85 1.70S 36 0 0 67 25 59.8 19 14 8 32 251 1.60 180.0 176.87 1.68S 36 15 0 67 22 22.7 19 14 20 32 251 1.61 180.0 176.89 1.66S 36 30 0 67 18 43.8 19 14 32 32 252 1.61 180.0 176.91 1.64S 36 45 0 67 15 3.1 19 14 45 32 252 1.62 180.1 176.94 1.62S 37 0 0 67 11 20.7 19 14 57 32 252 1.62 180.1 176.96 1.60S 37 15 0 67 7 36.5 19 15 10 32 253 1.63 180.1 176.98 1.58S 37 30 0 67 3 50.5 19 15 22 31 253 1.64 180.1 177.00 1.56S 37 45 0 67 0 2.7 19 15 35 31 253 1.64 180.1 177.02 1.54S 38 0 0 66 56 13.1 19 15 47 31 254 1.65 180.2 177.04 1.52S 38 15 0 66 52 21.7 19 15 59 31 254 1.66 180.2 177.06 1.50S 38 30 0 66 48 28.4 19 16 12 31 254 1.66 180.2 177.08 1.48S 38 45 0 66 44 33.3 19 16 24 31 255 1.67 180.2 177.10 1.46S 39 0 0 66 40 36.4 19 16 37 31 255 1.67 180.2 177.12 1.44S 39 15 0 66 36 37.7 19 16 50 31 255 1.68 180.3 177.14 1.42S 39 30 0 66 32 37.1 19 17 2 31 256 1.69 180.3 177.16 1.40S 39 45 0 66 28 34.7 19 17 15 31 256 1.69 180.3 177.18 1.38S 40 0 0 66 24 30.4 19 17 27 30 256 1.70 180.3 177.20 1.36S 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 33 meters [CHARM/CADARS, 12 measures] 946 is variable: 946 = eta Gem, 3.15 to 3.9, V, Type SRA+EA, Period 232.9 days, Phase 9% 946 is double: AB 3.5 6.2 1.6" 251.4 (BU 1008) Graze path of B approximately 1.4 km north, and 3.2 secs earlier compared to A - refer to graze profile for exact distances Librations Long -7.94 Lat +0.62 P +175.89 D +0.32 Illumination of moon 43%+ Elongation of Moon 82 Vertical Profile Scale approx. 2.84 km/arcsec at mean distance of moon Horizontal Scale Factor 1.77 deg/min At longitude 25.00: Limiting Magnitudes for various telescope apertures (in cm) CA\Tdia 5 10 15 20 25 30 35 -1.4 3.1 4.5 5.3 5.7 6.0 6.2 6.3 0.6 4.9 6.4 7.1 7.6 8.0 8.2 8.4 2.6 4.9 6.4 7.1 7.6 8.0 8.2 8.4 4.6 5.7 7.2 8.0 8.5 8.8 9.1 9.3 6.6 5.7 7.2 8.0 8.5 8.9 9.1 9.3 ------------------------------------------------------------------------------ Double star catalogue details WDS entries RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2 06147+2231DBR 157 2001 2016 2 256 256 4.4 4.5 16.1 16.9 +039+009 061441.61+223111.1 06149+2230BU 1008 1881 2012 102 300 260 1.1 1.7 3.52 6.15 M3.5I-II -063-010 +22 1241 NO 061452.69+223024.6 ------------------------------------------------ Interferometric catalogue entries 061452.69+223024.6 ADS 4841 BU 1008AB HD 42995 HIP 29655 06149+22 Date PA Sep M1 M2 N O 1976.8604 263.8 0.2 1.584 0.010 . . . . 552 20 3.8 1 McA1978b S 1977.1799 269.4 . 1.601 . . . . . 552 20 2.1 1 McA1982b S 1991.25 260.6 . 1.705 . 3.382 0.014 6.070 0.149 511 222 0.3 1 HIP1997a H 1991.25 . . . . 3.55 . 6.25 0.01 505 97 0.3 1 Fab2000a H 1991.25 . . . . 5.49 . 7.46 0.01 435 70 0.3 1 Fab2000a H 1991.93 261.9 . 1.759 . 3.519 0.009 6.154 0.010 530 100 1.4 1 TYC2000a H 1991.93 . . . . 5.451 0.014 7.364 0.015 430 90 1.4 1 TYC2000a H 2004.241 258.5 0.3 1.765 0.022 . . . . 530 57 1.0 1 Sca2005a S 2005.111 257.2 0.3 1.703 0.012 . . . . 644 70 1.0 1 Sca2007a S 2006.128 256.2 2. 1.65 0.06 . . . . 700 200 1.0 1 Orl2007 S 2008.243 257.2 0.3 1.787 0.009 . . . . 530 57 1.0 1 Pru2010 S 061452.70+223024.6 eta Gem BU 1008A HD 42995 HIP 29655 06149+22 Date PA Sep M1 M2 N 1975.9566 . . < 0.033 . . . . . 517 20 3.8 1 McA1978c S 1977.0870 . . < 0.035 . . . . . 552 20 3.8 1 McA1978c S 1979.7709 . . < 0.033 . . . . . 470 3.8 1 McA1981b S 1982.1679 . . < 0.028 . . . . . 550 ? 3.6 1 Bag1984b S 1982.1706 . . < 0.028 . . . . . 550 ? 3.6 1 Bag1984b S 1983.9340 . . < 0.06 . . . . . 550 3 2.0 1 Bnu1984 S 1988.807 . . < 0.05 . . . . . 2.1 1 Iso1991 S 1988.8087 . . < 0.05 . . . . . 2.1 1 Iso1990b S 1988.8114 . . < 0.05 . . . . . 2.1 1 Iso1990b S ------------------------------------------------ AAVSO Variable star entry Variable identifier Type Max Min Ph Epoch Period eta Gem SRA+EA 3.15 3.9 V 2437725.0000 232.9 ------------------------------------------------------------------------------ Results of Observer Scan UT Site Long. Lat. Dist. h m s Angeli 25.7 68.9 62km 19 5 52.1 Enontekiö 23.6 68.4 150km 19 4 18.5 Inari 27.0 68.9 38km 19 6 55.8 Ivalo 27.5 68.7 53km 19 7 19.6 Kaaresuvanto 22.5 68.5 161km 19 3 26.1 Karigasniemi 25.8 69.4 10km 19 6 0.6 Kemijärvi 27.4 66.7 253km 19 7 15.0 Kihlanki 23.6 67.6 234km 19 4 15.2 Kilpisjärvi 20.8 69.0 125km 19 2 9.4 Kittilä 24.9 67.7 204km 19 5 16.8 Kolari 23.8 67.3 256km 19 4 25.7 Kuusamo 29.2 66.0 294km 19 8 37.9 Meltaus 25.4 66.9 271km 19 5 38.2 Muonio 23.7 68.0 194km 19 4 20.2 Näätämö 29.1 69.7 73km 19 8 33.7 Nellim 28.3 68.8 21km 19 7 55.8 Nunnanen 24.5 68.4 134km 19 4 58.5 Nuorgam 27.9 70.1 92km 19 7 35.7 Pello 24.0 66.8 311km 19 4 33.8 Posio 28.2 66.1 300km 19 7 49.3 Pudasjärvi 27.0 65.4 401km 19 6 53.8 Ranua 26.5 65.9 352km 19 6 31.4 Rovaniemi 25.7 66.5 308km 19 5 55.2 Salla 28.7 66.8 216km 19 8 12.7 Savukoski 28.2 67.3 179km 19 7 49.4 Sevettijärvi 28.6 69.5 49km 19 8 9.6 Skiippagurra 28.2 70.2 106km 19 7 52.0 Sodankylä 26.6 67.4 197km 19 6 35.5 Taivalkoski 28.3 65.6 354km 19 7 53.2 Tervola 24.8 66.1 369km 19 5 12.3 Tulppio 29.2 67.8 111km 19 8 38.6 Utsjoki Ailigas 27.1 69.9 60km 19 6 57.5 Vuotso 27.1 68.1 118km 19 7 0.1 Ylitornio 23.7 66.3 365km 19 4 20.2