Occultation of UCAC4 551-011404 by 522 Helga on 2021 Feb 3 Distance from center of occultation path - in km Distances are positive to the right, referenced to the direction of motion along the path Uncertainty in time = +/- 32 secs d Proba- Location Longitude Latitude alt U.T. Sepn Alt Sun km bility o ' o ' m h m s " o o 299 - 0% ** Path limit plus 3-Sigma ** 230 - 2% ** Path limit plus 2-Sigma ** 165 E 18% Geraldton, WA 114 35. -28 45. 10 16 37 38 -0.044 11 -45 160 - 16% ** Path limit plus 1-Sigma ** 107 E 41% 320 Chiro Observatory 116 25. -30 55. 221 16 36 36 -0.029 9 -43 91 - 50% *** Path limit *** 0 - 81% **** Centre Line **** -11 W 75% 318 Quinns Rock 115 45. -31 35. 8 16 35 55 0.003 9 -42 -13 W 75% 323 Perth Observatory, Bickley 116 5. -32 5. 379 16 35 47 0.003 9 -42 -19 W 74% SCARBOROUGH WA BACON~IAN 115 55. -31 55. 40 16 35 49 0.005 9 -42 -19 W 74% 321 Craigie 115 45. -31 45. 39 16 35 50 0.005 9 -42 -21 W 74% Perth Obs. 116 5. -32 5. 396 16 35 45 0.006 9 -42 -28 W 72% Perth, WA 115 55. -31 55. 10 16 35 45 0.007 9 -42 -31 W 72% D21 Shenton Park 115 45. -31 55. -31 16 35 44 0.008 9 -42 -38 W 70% Greg Bolt 115 45. -31 55. 0 16 35 43 0.010 9 -42 -46 W 71% 337 Zo-Se 121 15. 31 5. 84 17 30 15 0.012 15 -66 -48 W 67% MURDOCH WA MURDOCH ASTRONO 115 45. -32 5. 0 16 35 38 0.013 9 -42 -68 W 62% SHANGHAI CN SHANGHAI OBSERV 121 25. 31 15. 15 17 30 31 0.018 15 -66 -85 W 52% Madora Bay WA AUS - Eric Limburg 115 45. -32 25. 9 16 35 22 0.023 9 -41 -91 - 50% *** Path limit *** -124 W 32% 364 YCPM Kagoshima Station 130 35. 31 35. 187 17 33 15 0.033 7 -58 -160 - 16% ** Path limit plus 1-Sigma ** -172 W 15% Bunbury, WA 115 35. -33 25. 5 16 34 47 0.046 9 -40 -188 W 11% Albany, WA 117 55. -35 5. 20 16 34 14 0.050 6 -39 -193 W 8% 330 Purple Mountain Observatory 118 45. 32 5. 335 17 30 19 0.052 17 -67 -224 W 5% Busselton, WA 115 25. -33 35. 5 16 34 30 0.060 9 -40 -230 - 2% ** Path limit plus 2-Sigma ** -248 W 1% 864 Kumamoto 130 45. 32 45. 36 17 34 0 0.066 7 -58 -261 W 1% Gaoyou China - Feisheng Jin 119 25. 32 45. 8 17 31 1 0.070 17 -66 -299 - 0% ** Path limit plus 3-Sigma ** Prediction of 2020 Mar 3.1