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 = +/- 14 secs d Proba- Location Longitude Latitude alt U.T. Sepn Alt Sun km bility o ' o ' m h m s " o o 120 - 0% ** Path limit plus 3-Sigma ** 111 - 2% ** Path limit plus 2-Sigma ** 102 - 16% ** Path limit plus 1-Sigma ** 93 - 50% *** Path limit *** 83 E 77% Geraldton, WA 114 35. -28 45. 10 16 38 3 -0.022 11 -45 23 E 100% 320 Chiro Observatory 116 25. -30 55. 221 16 37 1 -0.006 9 -43 0 - 100% **** Centre Line **** -93 - 50% *** Path limit *** -97 W 38% 318 Quinns Rock 115 45. -31 35. 8 16 36 20 0.025 9 -42 -99 W 33% 323 Perth Observatory, Bickley 116 5. -32 5. 379 16 36 12 0.026 9 -42 -102 - 16% ** Path limit plus 1-Sigma ** -105 W 19% SCARBOROUGH WA BACON~IAN 115 55. -31 55. 40 16 36 14 0.027 9 -42 -105 W 18% 321 Craigie 115 45. -31 45. 39 16 36 15 0.028 9 -42 -107 W 14% Perth Obs. 116 5. -32 5. 396 16 36 10 0.028 9 -42 -111 - 2% ** Path limit plus 2-Sigma ** -114 W 6% Perth, WA 115 55. -31 55. 10 16 36 10 0.030 9 -42 -117 W 3% D21 Shenton Park 115 45. -31 55. -31 16 36 9 0.031 9 -42 -120 - 0% ** Path limit plus 3-Sigma ** Prediction of 2020 Dec 31.0