IOTA/IOTA-ES occultation update for (46303) 2001 OZ44 / UCAC4 363-170985 event on 2024 Oct 17, 23:03 UT Visible from Summary ------- On 2024 Oct 17 UT, the 11.158005924834 km diameter asteroid (46303) 2001 OZ44 will occult a 11.9 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.30 mag to 19.17 mag (the magnitude of the asteroid) for at most 0.510 seconds. This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 91 * date and approx. time of event: 2024 Oct 17, 23:00 - 2024 Oct 17, 23:06 * geocentric midpoint of event [JD]: 2460601.46068804 * magnitude of target star: 11.87 * magnitude drop [mag]: 7.30 * estimated maximum duration [s]: 0.510 * Moon: 100 % sunlit, 108° distance * Sun: 79° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 0.52 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.001", 71°) * approx speed of asteroid's shadow [km/s]: 22.5051 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 363-170985 by 46303 2001 OZ44 on 2024 Oct 17 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude -158 0 0 45 57 57 23 0 53.1 0 116 34 45 51 35 46 4 21 45 45 0 46 11 0 .... -157 0 0 45 38 10 23 0 53.1 1 117 34 45 31 49 45 44 32 45 25 16 45 51 9 -0.78 -156 0 0 45 18 43 23 0 53.3 2 117 34 45 12 24 45 25 4 45 5 52 45 31 39 -1.12 -155 0 0 44 59 38 23 0 53.6 3 118 34 44 53 20 45 5 57 44 46 50 45 12 31 -1.26 -154 0 0 44 40 54 23 0 53.9 3 119 34 44 34 37 44 47 12 44 28 9 44 53 44 -1.33 -153 0 0 44 22 33 23 0 54.4 4 119 34 44 16 17 44 28 49 44 9 51 44 35 19 -1.38 -152 0 0 44 4 34 23 0 55.0 5 120 34 43 58 20 44 10 49 43 51 55 44 17 18 -1.41 -151 0 0 43 46 59 23 0 55.6 6 121 34 43 40 46 43 53 12 43 34 22 43 59 40 -1.44 -150 0 0 43 29 47 23 0 56.4 6 121 34 43 23 37 43 35 59 43 17 14 43 42 26 -1.46 -149 0 0 43 13 0 23 0 57.3 7 122 34 43 6 51 43 19 11 43 0 30 43 25 36 -1.47 -148 0 0 42 56 38 23 0 58.2 8 123 34 42 50 30 43 2 48 42 44 10 43 9 11 -1.48 -147 0 0 42 40 41 23 0 59.3 9 124 34 42 34 34 42 46 50 42 28 16 42 53 12 -1.49 -146 0 0 42 25 10 23 1 0.4 10 124 34 42 19 4 42 31 17 42 12 47 42 37 38 -1.50 -145 0 0 42 10 5 23 1 1.7 10 125 34 42 4 1 42 16 11 41 57 44 42 22 31 -1.51 -144 0 0 41 55 27 23 1 3.0 11 126 34 41 49 23 42 1 31 41 43 8 42 7 50 -1.51 -143 0 0 41 41 15 23 1 4.5 12 126 33 41 35 13 41 47 19 41 28 59 41 53 36 -1.52 -142 0 0 41 27 31 23 1 6.0 13 127 33 41 21 30 41 33 33 41 15 17 41 39 49 -1.53 -141 0 0 41 14 14 23 1 7.7 13 128 33 41 8 14 41 20 16 41 2 2 41 26 31 -1.53 -140 0 0 41 1 26 23 1 9.4 14 129 33 40 55 26 41 7 26 40 49 16 41 13 40 -1.53 -139 0 0 40 49 5 23 1 11.2 15 129 33 40 43 7 40 55 4 40 36 57 41 1 17 -1.54 -138 0 0 40 37 13 23 1 13.1 15 130 32 40 31 16 40 43 12 40 25 7 40 49 24 -1.54 -137 0 0 40 25 50 23 1 15.1 16 131 32 40 19 54 40 31 48 40 13 46 40 37 59 -1.54 -136 0 0 40 14 57 23 1 17.2 17 132 32 40 9 1 40 20 53 40 2 54 40 27 4 -1.55 -135 0 0 40 4 32 23 1 19.3 18 132 31 39 58 38 40 10 28 39 52 31 40 16 38 -1.55 -134 0 0 39 54 38 23 1 21.6 18 133 31 39 48 44 40 0 33 39 42 38 40 6 42 -1.55 -133 0 0 39 45 13 23 1 23.9 19 134 30 39 39 20 39 51 8 39 33 15 39 57 15 -1.55 -132 0 0 39 36 19 23 1 26.4 20 135 30 39 30 26 39 42 13 39 24 22 39 48 20 -1.56 -131 0 0 39 27 55 23 1 28.9 20 136 30 39 22 3 39 33 48 39 15 59 39 39 54 -1.56 -130 0 0 39 20 1 23 1 31.4 21 136 29 39 14 10 39 25 54 39 8 7 39 32 0 -1.56 -129 0 0 39 12 39 23 1 34.1 21 137 29 39 6 48 39 18 31 39 0 46 39 24 36 -1.56 -128 0 0 39 5 47 23 1 36.8 22 138 28 38 59 56 39 11 38 38 53 55 39 17 43 -1.56 -127 0 0 38 59 26 23 1 39.6 23 139 28 38 53 36 39 5 17 38 47 35 39 11 21 -1.57 -126 0 0 38 53 37 23 1 42.5 23 140 27 38 47 48 38 59 27 38 41 47 39 5 31 -1.57 -125 0 0 38 48 19 23 1 45.5 24 141 27 38 42 30 38 54 9 38 36 30 39 0 12 -1.57 -124 0 0 38 43 33 23 1 48.5 24 142 26 38 37 44 38 49 23 38 31 44 38 55 25 -1.57 -123 0 0 38 39 18 23 1 51.6 25 142 25 38 33 30 38 45 7 38 27 30 38 51 10 -1.57 -122 0 0 38 35 35 23 1 54.7 25 143 25 38 29 47 38 41 24 38 23 48 38 47 27 -1.57 -121 0 0 38 32 24 23 1 57.9 26 144 24 38 26 36 38 38 13 38 20 37 38 44 15 -1.57 -120 0 0 38 29 45 23 2 1.2 26 145 24 38 23 57 38 35 34 38 17 58 38 41 35 -1.58 -119 0 0 38 27 38 23 2 4.5 27 146 23 38 21 50 38 33 26 38 15 52 38 39 28 -1.58 -118 0 0 38 26 3 23 2 7.9 27 147 22 38 20 16 38 31 52 38 14 17 38 37 53 -1.58 -117 0 0 38 25 0 23 2 11.3 28 148 22 38 19 13 38 30 49 38 13 14 38 36 50 -1.58 -116 0 0 38 24 30 23 2 14.8 28 149 21 38 18 42 38 30 18 38 12 44 38 36 20 -1.58 -115 0 0 38 24 32 23 2 18.3 29 150 20 38 18 44 38 30 20 38 12 46 38 36 22 -1.58 -114 0 0 38 25 6 23 2 21.9 29 151 20 38 19 18 38 30 54 38 13 19 38 36 56 -1.58 -113 0 0 38 26 12 23 2 25.5 29 152 19 38 20 24 38 32 0 38 14 25 38 38 2 -1.58 -112 0 0 38 27 50 23 2 29.2 30 153 18 38 22 2 38 33 39 38 16 3 38 39 41 -1.58 -111 0 0 38 30 1 23 2 32.9 30 154 18 38 24 13 38 35 50 38 18 14 38 41 52 -1.59 -110 0 0 38 32 44 23 2 36.6 30 155 17 38 26 56 38 38 33 38 20 56 38 44 35 -1.59 -109 0 0 38 35 59 23 2 40.4 31 156 16 38 30 10 38 41 48 38 24 11 38 47 51 -1.59 -108 0 0 38 39 46 23 2 44.1 31 157 15 38 33 57 38 45 36 38 27 57 38 51 39 -1.59 -107 0 0 38 44 5 23 2 48.0 31 158 15 38 38 16 38 49 55 38 32 16 38 55 59 -1.59 -106 0 0 38 48 56 23 2 51.8 31 160 14 38 43 7 38 54 47 38 37 6 39 0 51 -1.59 -105 0 0 38 54 20 23 2 55.7 32 161 13 38 48 30 39 0 11 38 42 28 39 6 15 -1.59 -104 0 0 39 0 15 23 2 59.6 32 162 12 38 54 24 39 6 6 38 48 23 39 12 11 -1.59 -103 0 0 39 6 41 23 3 3.5 32 163 12 39 0 50 39 12 34 38 54 48 39 18 39 -1.59 -102 0 0 39 13 40 23 3 7.4 32 164 11 39 7 48 39 19 32 39 1 45 39 25 38 -1.59 -101 0 0 39 21 9 23 3 11.3 32 165 10 39 15 17 39 27 3 39 9 14 39 33 9 -1.59 -100 0 0 39 29 10 23 3 15.2 32 166 9 39 23 17 39 35 4 39 17 13 39 41 11 -1.59 - 99 0 0 39 37 42 23 3 19.2 32 168 8 39 31 49 39 43 37 39 25 44 39 49 45 -1.59 - 98 0 0 39 46 45 23 3 23.1 32 169 8 39 40 51 39 52 40 39 34 45 39 58 49 -1.59 - 97 0 0 39 56 19 23 3 27.1 32 170 7 39 50 24 40 2 15 39 44 17 40 8 24 -1.59 - 96 0 0 40 6 23 23 3 31.0 32 171 6 40 0 27 40 12 20 39 54 20 40 18 30 -1.59 - 95 0 0 40 16 57 23 3 34.9 32 172 5 40 11 1 40 22 55 40 4 52 40 29 7 -1.59 - 94 0 0 40 28 2 23 3 38.9 32 173 4 40 22 4 40 34 1 40 15 55 40 40 13 -1.59 - 93 0 0 40 39 36 23 3 42.8 32 174 4 40 33 38 40 45 36 40 27 28 40 51 49 -1.59 - 92 0 0 40 51 40 23 3 46.7 32 176 3 40 45 40 40 57 41 40 39 29 41 3 55 -1.59 - 91 0 0 41 4 13 23 3 50.6 32 177 2 40 58 13 41 10 15 40 52 0 41 16 30 -1.59 - 90 0 0 41 17 15 23 3 54.4 31 178 1 41 11 13 41 23 18 41 5 0 41 29 34 -1.60 - 89 0 0 41 30 46 23 3 58.3 31 179 0 41 24 43 41 36 50 41 18 29 41 43 7 -1.60 - 88 0 0 41 44 45 23 4 2.1 31 180 0 41 38 41 41 50 50 41 32 26 41 57 9 -1.60 - 87 0 0 41 59 12 23 4 5.9 31 181 -1 41 53 7 42 5 18 41 46 50 42 11 38 -1.60 - 86 0 0 42 14 6 23 4 9.6 30 182 -2 42 8 0 42 20 14 42 1 42 42 26 35 -1.60 - 85 0 0 42 29 28 23 4 13.3 30 184 -3 42 23 21 42 35 37 42 17 1 42 41 59 -1.60 - 84 0 0 42 45 17 23 4 17.0 30 185 -3 42 39 8 42 51 27 42 32 47 42 57 51 -1.60 - 83 0 0 43 1 32 23 4 20.7 29 186 -4 42 55 22 43 7 43 42 49 0 43 14 8 -1.60 - 82 0 0 43 18 13 23 4 24.3 29 187 -5 43 12 1 43 24 25 43 5 38 43 30 52 -1.60 - 81 0 0 43 35 19 23 4 27.8 29 188 -6 43 29 6 43 41 33 43 22 41 43 48 1 -1.60 - 80 0 0 43 52 50 23 4 31.3 28 189 -7 43 46 36 43 59 6 43 40 10 44 5 36 -1.60 - 79 0 0 44 10 46 23 4 34.8 28 190 -7 44 4 30 44 17 3 43 58 3 44 23 34 -1.60 - 78 0 0 44 29 6 23 4 38.2 27 191 -8 44 22 49 44 35 24 44 16 20 44 41 57 -1.60 - 77 0 0 44 47 49 23 4 41.5 27 192 -9 44 41 30 44 54 9 44 35 0 45 0 43 -1.60 - 76 0 0 45 6 55 23 4 44.8 27 193 -10 45 0 35 45 13 17 44 54 3 45 19 53 -1.60 - 75 0 0 45 26 23 23 4 48.1 26 194 -10 45 20 2 45 32 46 45 13 28 45 39 24 -1.60 - 74 0 0 45 46 14 23 4 51.2 26 195 -11 45 39 50 45 52 38 45 33 15 45 59 18 -1.60 - 73 0 0 46 6 25 23 4 54.3 25 196 -12 46 0 0 46 12 51 45 53 23 46 19 32 -1.60 - 72 0 0 46 26 56 23 4 57.4 25 197 -12 46 20 30 46 33 24 46 13 51 46 40 7 -1.60 - 71 0 0 46 47 48 23 5 0.4 24 198 -13 46 41 19 46 54 17 46 34 39 47 1 2 -1.60 - 70 0 0 47 8 58 23 5 3.3 23 199 -14 47 2 28 47 15 30 46 55 46 47 22 16 -1.60 - 69 0 0 47 30 27 23 5 6.1 23 200 -15 47 23 56 47 37 0 47 17 12 47 43 48 -1.60 - 68 0 0 47 52 14 23 5 8.8 22 201 -15 47 45 40 47 58 48 47 38 55 48 5 38 -1.60 - 67 0 0 48 14 17 23 5 11.5 22 202 -16 48 7 42 48 20 54 48 0 55 48 27 46 -1.60 - 66 0 0 48 36 37 23 5 14.1 21 203 -16 48 30 0 48 43 15 48 23 11 48 50 9 -1.60 - 65 0 0 48 59 12 23 5 16.7 20 204 -17 48 52 34 49 5 52 48 45 43 49 12 48 -1.60 - 64 0 0 49 22 3 23 5 19.1 20 205 -18 49 15 22 49 28 44 49 8 29 49 35 42 -1.60 - 63 0 0 49 45 6 23 5 21.5 19 206 -18 49 38 24 49 51 50 49 31 30 49 58 49 -1.60 - 62 0 0 50 8 23 23 5 23.7 19 207 -19 50 1 39 50 15 9 49 54 43 50 22 10 -1.60 - 61 0 0 50 31 52 23 5 25.9 18 208 -20 50 25 7 50 38 39 50 18 8 50 45 42 -1.60 - 60 0 0 50 55 33 23 5 28.0 17 209 -20 50 48 45 51 2 21 50 41 45 51 9 26 -1.60 - 59 0 0 51 19 23 23 5 30.1 17 209 -21 51 12 34 51 26 14 51 5 32 51 33 21 -1.60 - 58 0 0 51 43 24 23 5 32.0 16 210 -21 51 36 33 51 50 16 51 29 29 51 57 25 -1.60 - 57 0 0 52 7 33 23 5 33.9 15 211 -22 52 0 40 52 14 27 51 53 35 52 21 37 -1.60 - 56 0 0 52 31 50 23 5 35.6 15 212 -22 52 24 55 52 38 46 52 17 48 52 45 58 -1.60 - 55 0 0 52 56 14 23 5 37.3 14 213 -23 52 49 18 53 3 11 52 42 9 53 10 25 -1.61 - 54 0 0 53 20 44 23 5 38.9 13 214 -23 53 13 46 53 27 43 53 6 35 53 34 59 -1.61 - 53 0 0 53 45 19 23 5 40.4 13 215 -24 53 38 19 53 52 20 53 31 7 53 59 37 -1.61 - 52 0 0 54 9 58 23 5 41.9 12 216 -24 54 2 57 54 17 1 53 55 43 54 24 20 -1.61 - 51 0 0 54 34 40 23 5 43.2 11 216 -25 54 27 38 54 41 45 54 20 22 54 49 6 -1.61 - 50 0 0 54 59 25 23 5 44.4 11 217 -25 54 52 21 55 6 31 54 45 3 55 13 54 -1.61 - 49 0 0 55 24 11 23 5 45.6 10 218 -25 55 17 5 55 31 19 55 9 46 55 38 43 -1.61 - 48 0 0 55 48 57 23 5 46.7 9 219 -26 55 41 50 55 56 7 55 34 30 56 3 33 -1.61 - 47 0 0 56 13 43 23 5 47.7 9 220 -26 56 6 34 56 20 54 55 59 12 56 28 22 -1.62 - 46 0 0 56 38 28 23 5 48.6 8 221 -26 56 31 18 56 45 40 56 23 54 56 53 9 -1.62 - 45 0 0 57 3 10 23 5 49.4 7 222 -27 56 55 58 57 10 24 56 48 33 57 17 54 -1.62 - 44 0 0 57 27 49 23 5 50.2 7 222 -27 57 20 36 57 35 4 57 13 9 57 42 36 -1.62 - 43 0 0 57 52 24 23 5 50.9 6 223 -27 57 45 9 57 59 40 57 37 42 58 7 13 -1.63 - 42 0 0 58 16 53 23 5 51.5 5 224 -28 58 9 37 58 24 11 58 2 9 58 31 45 -1.63 - 41 0 0 58 41 17 23 5 52.0 5 225 -28 58 34 0 58 48 35 58 26 30 58 56 11 -1.64 - 40 0 0 59 5 33 23 5 52.4 4 226 -28 58 58 16 59 12 53 58 50 44 59 20 30 -1.65 - 39 0 0 59 29 43 23 5 52.8 3 227 -28 59 22 24 59 37 3 59 14 51 59 44 42 -1.66 - 38 0 0 59 53 43 23 5 53.1 3 228 -29 59 46 23 60 1 5 59 38 50 60 8 44 -1.68 - 37 0 0 60 17 34 23 5 53.3 2 228 -29 60 10 14 60 24 57 60 2 39 60 32 37 -1.70 - 36 0 0 60 41 16 23 5 53.5 1 229 -29 60 33 54 60 48 39 60 26 19 60 56 20 -1.75 - 35 0 0 61 4 46 23 5 53.6 1 230 -29 60 57 23 61 12 10 60 49 48 61 19 52 -1.89 - 34 0 0 61 28 4 23 5 53.6 0 231 -29 61 20 41 61 35 29 61 13 5 .. .. .. -3.61 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 363-170985 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 57 49.3548 DE: -17 30 30.890 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 57 49.3548 DE: -17 30 30.890 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.9 * B mag [mag]: 13.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (46303) 2001 OZ44 asteroid class: approx. diameter [km]: 11 approx. diameter ["]: 0.005 distance from Earth [AU]: 2.88160 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#44 date of fit: 2023 Apr 25 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.015", 0.001", 71.079° remarks: * orbital elements for (46303)2001 OZ44 : Mean anomaly = 101.5373455622 deg Arg. of pericenter = 273.8713484700 deg Long. of node = 279.0704943797 deg Inclination = 12.3932210686 deg Eccentricity = 0.0908124618 Semimajor axis = 2.7941702414 AU Perihelion dist = 2.5404247630 AU Mag: H = 13.59, G = 0.15 Epoch of elements : MJD 60600.96068804 TDT (2024 Oct 17.9607) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#442023Apr25,0.51,2024,10,17,23.056513,-0.132919,0.834793,12.545362,1.991715,0.005633,0.000676,0.000000,0.000000 -87.9707,-17.4759,-169.56,-9.70,False UCAC4 363-170985,18.96370970,-17.5085805,12.95,11.87,11.29,0.1,4,,18.98756650,-17.4759483,7.30,7.44,0,0,0 46303,2001 OZ44,19.17,11.367,2.8816,0,0,2.676,6.08,,1.0,0 0,101.3346,2024,10,17,273.8713,279.0705,12.3932,0.09081,2.79417,2.54042,13.59,5.0,0.15 1.517,0.0150,0.0011,71,0.0028,Known errors,0.92,0,-1,-1 20241017_170985,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:24 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org