IOTA/IOTA-ES occultation update for (3898) Curlewis / UCAC4 337-108121 event on 2024 Sep 29, 00:30 UT Visible from Summary ------- On 2024 Sep 29 UT, the 16.4099287540396 km diameter asteroid (3898) Curlewis will occult a 11.1 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 7.78 mag to 18.87 mag (the magnitude of the asteroid) for at most 0.900 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: 99 * date and approx. time of event: 2024 Sep 29, 00:26 - 2024 Sep 29, 00:34 * geocentric midpoint of event [JD]: 2460582.52084446 * magnitude of target star: 11.09 * magnitude drop [mag]: 7.78 * estimated maximum duration [s]: 0.900 * Moon: 12 % sunlit, 121° distance * Sun: 80° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.002", 91°) * approx speed of asteroid's shadow [km/s]: 19.8765 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 337-108121 by 3898 Curlewis on 2024 Sep 29 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 -176 0 0 41 32 33 0 26 9.5 0 121 44 41 24 48 41 40 19 41 19 41 41 45 28 .... -175 0 0 41 5 18 0 26 9.6 1 122 45 40 57 34 41 13 4 40 52 28 41 18 11 -0.46 -174 0 0 40 38 3 0 26 9.8 2 123 45 40 30 20 40 45 48 40 25 15 40 50 55 -0.65 -173 0 0 40 10 50 0 26 10.1 3 123 45 40 3 7 40 18 33 39 58 2 40 23 40 -0.74 -172 0 0 39 43 38 0 26 10.5 4 124 45 39 35 56 39 51 21 39 30 52 39 56 27 -0.78 -171 0 0 39 16 29 0 26 11.1 5 125 45 39 8 48 39 24 11 39 3 45 39 29 16 -0.81 -170 0 0 38 49 24 0 26 11.7 6 125 45 38 41 44 38 57 4 38 36 41 39 2 9 -0.83 -169 0 0 38 22 23 0 26 12.4 7 126 45 38 14 44 38 30 3 38 9 42 38 35 7 -0.85 -168 0 0 37 55 28 0 26 13.3 8 127 45 37 47 50 38 3 6 37 42 49 38 8 10 -0.86 -167 0 0 37 28 39 0 26 14.3 8 127 45 37 21 2 37 36 16 37 16 1 37 41 19 -0.87 -166 0 0 37 1 57 0 26 15.4 9 128 45 36 54 21 37 9 33 36 49 21 37 14 35 -0.88 -165 0 0 36 35 23 0 26 16.6 10 128 45 36 27 49 36 42 58 36 22 49 36 47 59 -0.88 -164 0 0 36 8 58 0 26 17.9 11 129 45 36 1 25 36 16 32 35 56 26 36 21 33 -0.89 -163 0 0 35 42 43 0 26 19.3 12 130 45 35 35 11 35 50 16 35 30 13 35 55 16 -0.89 -162 0 0 35 16 38 0 26 20.9 13 130 45 35 9 8 35 24 10 35 4 11 35 29 9 -0.90 -161 0 0 34 50 45 0 26 22.6 14 131 44 34 43 16 34 58 16 34 38 20 35 3 14 -0.90 -160 0 0 34 25 5 0 26 24.3 15 132 44 34 17 36 34 32 34 34 12 41 34 37 31 -0.90 -159 0 0 33 59 37 0 26 26.2 16 132 44 33 52 10 34 7 5 33 47 15 34 12 2 -0.91 -158 0 0 33 34 23 0 26 28.3 17 133 44 33 26 57 33 41 50 33 22 4 33 46 46 -0.91 -157 0 0 33 9 24 0 26 30.4 18 133 43 33 2 0 33 16 50 32 57 7 33 21 45 -0.91 -156 0 0 32 44 41 0 26 32.6 18 134 43 32 37 17 32 52 5 32 32 25 32 56 59 -0.91 -155 0 0 32 20 13 0 26 35.0 19 135 43 32 12 51 32 27 36 32 8 0 32 32 29 -0.92 -154 0 0 31 56 3 0 26 37.5 20 135 42 31 48 42 32 3 25 31 43 52 32 8 17 -0.92 -153 0 0 31 32 10 0 26 40.0 21 136 42 31 24 50 31 39 31 31 20 1 31 44 22 -0.92 -152 0 0 31 8 36 0 26 42.7 22 137 41 31 1 17 31 15 55 30 56 29 31 20 45 -0.92 -151 0 0 30 45 20 0 26 45.5 23 137 41 30 38 3 30 52 38 30 33 15 30 57 28 -0.92 -150 0 0 30 22 25 0 26 48.4 24 138 40 30 15 9 30 29 42 30 10 22 30 34 30 -0.92 -149 0 0 29 59 50 0 26 51.5 25 139 40 29 52 35 30 7 5 29 47 49 30 11 53 -0.93 -148 0 0 29 37 36 0 26 54.6 25 140 39 29 30 23 29 44 50 29 25 37 29 49 37 -0.93 -147 0 0 29 15 44 0 26 57.8 26 140 39 29 8 31 29 22 57 29 3 47 29 27 43 -0.93 -146 0 0 28 54 14 0 27 1.1 27 141 38 28 47 3 29 1 25 28 42 19 29 6 11 -0.93 -145 0 0 28 33 6 0 27 4.5 28 142 37 28 25 57 28 40 17 28 21 14 28 45 2 -0.93 -144 0 0 28 12 23 0 27 8.1 29 142 37 28 5 14 28 19 32 28 0 32 28 24 16 -0.93 -143 0 0 27 52 3 0 27 11.7 30 143 36 27 44 56 27 59 11 27 40 14 28 3 54 -0.93 -142 0 0 27 32 8 0 27 15.4 30 144 36 27 25 2 27 39 15 27 20 21 27 43 57 -0.93 -141 0 0 27 12 38 0 27 19.2 31 145 35 27 5 33 27 19 43 27 0 53 27 24 25 -0.93 -140 0 0 26 53 33 0 27 23.1 32 146 34 26 46 29 27 0 38 26 41 50 27 5 18 -0.94 -139 0 0 26 34 54 0 27 27.0 33 146 33 26 27 51 26 41 58 26 23 13 26 46 38 -0.94 -138 0 0 26 16 42 0 27 31.1 33 147 33 26 9 40 26 23 44 26 5 3 26 28 24 -0.94 -137 0 0 25 58 57 0 27 35.2 34 148 32 25 51 56 26 5 58 25 47 19 26 10 37 -0.94 -136 0 0 25 41 38 0 27 39.4 35 149 31 25 34 39 25 48 39 25 30 3 25 53 17 -0.94 -135 0 0 25 24 48 0 27 43.7 36 150 30 25 17 50 25 31 47 25 13 14 25 36 25 -0.94 -134 0 0 25 8 26 0 27 48.1 36 151 30 25 1 28 25 15 24 24 56 53 25 20 1 -0.94 -133 0 0 24 52 32 0 27 52.5 37 152 29 24 45 35 24 59 29 24 41 1 25 4 5 -0.94 -132 0 0 24 37 7 0 27 57.1 38 153 28 24 30 11 24 44 3 24 25 38 24 48 38 -0.94 -131 0 0 24 22 11 0 28 1.6 38 154 27 24 15 16 24 29 6 24 10 43 24 33 41 -0.94 -130 0 0 24 7 44 0 28 6.3 39 155 26 24 0 51 24 14 39 23 56 18 24 19 13 -0.94 -129 0 0 23 53 48 0 28 11.0 40 156 26 23 46 55 24 0 41 23 42 23 24 5 15 -0.94 -128 0 0 23 40 21 0 28 15.7 40 157 25 23 33 29 23 47 14 23 28 58 23 51 47 -0.95 -127 0 0 23 27 25 0 28 20.6 41 158 24 23 20 33 23 34 17 23 16 2 23 38 49 -0.95 -126 0 0 23 14 59 0 28 25.4 41 159 23 23 8 8 23 21 50 23 3 38 23 26 22 -0.95 -125 0 0 23 3 4 0 28 30.3 42 160 22 22 56 14 23 9 54 22 51 44 23 14 25 -0.95 -124 0 0 22 51 40 0 28 35.3 42 161 21 22 44 51 22 58 29 22 40 21 23 3 0 -0.95 -123 0 0 22 40 47 0 28 40.3 43 162 20 22 33 59 22 47 36 22 29 30 22 52 6 -0.95 -122 0 0 22 30 26 0 28 45.4 43 163 20 22 23 38 22 37 14 22 19 10 22 41 44 -0.95 -121 0 0 22 20 36 0 28 50.5 44 165 19 22 13 49 22 27 24 22 9 21 22 31 53 -0.95 -120 0 0 22 11 18 0 28 55.6 44 166 18 22 4 32 22 18 5 22 0 4 22 22 34 -0.95 -119 0 0 22 2 32 0 29 0.8 44 167 17 21 55 47 22 9 19 21 51 19 22 13 48 -0.95 -118 0 0 21 54 19 0 29 6.0 45 168 16 21 47 34 22 1 5 21 43 7 22 5 33 -0.95 -117 0 0 21 46 37 0 29 11.2 45 170 15 21 39 53 21 53 23 21 35 26 21 57 51 -0.95 -116 0 0 21 39 28 0 29 16.4 45 171 14 21 32 44 21 46 13 21 28 18 21 50 41 -0.95 -115 0 0 21 32 52 0 29 21.7 45 172 13 21 26 8 21 39 37 21 21 42 21 44 4 -0.95 -114 0 0 21 26 48 0 29 27.0 46 174 12 21 20 5 21 33 32 21 15 39 21 38 0 -0.95 -113 0 0 21 21 17 0 29 32.3 46 175 11 21 14 34 21 28 1 21 10 8 21 32 28 -0.95 -112 0 0 21 16 19 0 29 37.6 46 176 10 21 9 36 21 23 2 21 5 11 21 27 29 -0.95 -111 0 0 21 11 54 0 29 42.9 46 178 9 21 5 11 21 18 37 21 0 46 21 23 3 -0.95 -110 0 0 21 8 1 0 29 48.3 46 179 9 21 1 19 21 14 44 20 56 54 21 19 11 -0.95 -109 0 0 21 4 42 0 29 53.6 46 180 8 20 58 0 21 11 25 20 53 35 21 15 51 -0.96 -108 0 0 21 1 56 0 29 59.0 46 182 7 20 55 14 21 8 38 20 50 49 21 13 4 -0.96 -107 0 0 20 59 43 0 30 4.3 46 183 6 20 53 1 21 6 25 20 48 37 21 10 51 -0.96 -106 0 0 20 58 3 0 30 9.7 46 184 5 20 51 21 21 4 45 20 46 57 21 9 11 -0.96 -105 0 0 20 56 56 0 30 15.0 46 186 4 20 50 15 21 3 38 20 45 50 21 8 4 -0.96 -104 0 0 20 56 23 0 30 20.4 46 187 3 20 49 41 21 3 5 20 45 17 21 7 31 -0.96 -103 0 0 20 56 22 0 30 25.7 46 189 2 20 49 41 21 3 5 20 45 17 21 7 30 -0.96 -102 0 0 20 56 55 0 30 31.0 46 190 1 20 50 14 21 3 38 20 45 49 21 8 3 -0.96 -101 0 0 20 58 1 0 30 36.3 46 191 0 20 51 20 21 4 44 20 46 55 21 9 10 -0.96 -100 0 0 20 59 41 0 30 41.6 45 192 -1 20 52 59 21 6 23 20 48 35 21 10 49 -0.96 - 99 0 0 21 1 53 0 30 46.8 45 194 -2 20 55 12 21 8 36 20 50 47 21 13 2 -0.96 - 98 0 0 21 4 39 0 30 52.1 45 195 -3 20 57 57 21 11 22 20 53 32 21 15 48 -0.96 - 97 0 0 21 7 58 0 30 57.3 45 196 -4 21 1 16 21 14 41 20 56 51 21 19 7 -0.96 - 96 0 0 21 11 50 0 31 2.4 44 198 -5 21 5 7 21 18 33 21 0 42 21 22 59 -0.96 - 95 0 0 21 16 14 0 31 7.6 44 199 -6 21 9 32 21 22 58 21 5 6 21 27 24 -0.96 - 94 0 0 21 21 12 0 31 12.7 43 200 -7 21 14 29 21 27 55 21 10 3 21 32 22 -0.96 - 93 0 0 21 26 42 0 31 17.8 43 201 -8 21 19 58 21 33 26 21 15 33 21 37 53 -0.96 - 92 0 0 21 32 44 0 31 22.8 43 202 -9 21 26 1 21 39 29 21 21 35 21 43 56 -0.96 - 91 0 0 21 39 20 0 31 27.8 42 203 -10 21 32 36 21 46 5 21 28 9 21 50 32 -0.96 - 90 0 0 21 46 27 0 31 32.7 42 205 -11 21 39 43 21 53 13 21 35 16 21 57 41 -0.96 - 89 0 0 21 54 7 0 31 37.6 41 206 -11 21 47 22 22 0 53 21 42 56 22 5 21 -0.96 - 88 0 0 22 2 20 0 31 42.5 41 207 -12 21 55 34 22 9 6 21 51 7 22 13 35 -0.96 - 87 0 0 22 11 4 0 31 47.2 40 208 -13 22 4 18 22 17 51 21 59 50 22 22 20 -0.96 - 86 0 0 22 20 20 0 31 52.0 39 209 -14 22 13 33 22 27 8 22 9 5 22 31 37 -0.96 - 85 0 0 22 30 8 0 31 56.7 39 210 -15 22 23 21 22 36 56 22 18 52 22 41 26 -0.96 - 84 0 0 22 40 27 0 32 1.3 38 211 -16 22 33 39 22 47 16 22 29 10 22 51 46 -0.96 - 83 0 0 22 51 18 0 32 5.8 38 212 -17 22 44 29 22 58 7 22 40 0 23 2 38 -0.96 - 82 0 0 23 2 39 0 32 10.3 37 213 -18 22 55 50 23 9 30 22 51 20 23 14 1 -0.96 - 81 0 0 23 14 32 0 32 14.7 36 214 -19 23 7 42 23 21 23 23 3 12 23 25 54 -0.96 - 80 0 0 23 26 55 0 32 19.1 36 214 -20 23 20 4 23 33 47 23 15 34 23 38 19 -0.96 - 79 0 0 23 39 49 0 32 23.3 35 215 -21 23 32 57 23 46 41 23 28 26 23 51 14 -0.96 - 78 0 0 23 53 12 0 32 27.5 34 216 -22 23 46 20 24 0 6 23 41 48 24 4 39 -0.96 - 77 0 0 24 7 6 0 32 31.6 33 217 -22 24 0 13 24 14 0 23 55 40 24 18 34 -0.96 - 76 0 0 24 21 29 0 32 35.7 33 218 -23 24 14 35 24 28 24 24 10 2 24 32 59 -0.96 - 75 0 0 24 36 22 0 32 39.6 32 218 -24 24 29 26 24 43 18 24 24 53 24 47 53 -0.96 - 74 0 0 24 51 43 0 32 43.5 31 219 -25 24 44 47 24 58 40 24 40 12 25 3 15 -0.96 - 73 0 0 25 7 33 0 32 47.3 30 220 -26 25 0 36 25 14 31 24 56 1 25 19 7 -0.96 - 72 0 0 25 23 51 0 32 51.0 29 221 -27 25 16 53 25 30 50 25 12 17 25 35 27 -0.96 - 71 0 0 25 40 37 0 32 54.6 29 221 -28 25 33 38 25 47 37 25 29 1 25 52 14 -0.96 - 70 0 0 25 57 50 0 32 58.1 28 222 -29 25 50 50 26 4 51 25 46 13 26 9 29 -0.96 - 69 0 0 26 15 30 0 33 1.5 27 223 -29 26 8 29 26 22 33 26 3 52 26 27 12 -0.96 - 68 0 0 26 33 38 0 33 4.8 26 224 -30 26 26 35 26 40 41 26 21 57 26 45 20 -0.96 - 67 0 0 26 52 11 0 33 8.0 25 224 -31 26 45 8 26 59 15 26 40 29 27 3 56 -0.96 - 66 0 0 27 11 10 0 33 11.1 24 225 -32 27 4 6 27 18 15 26 59 26 27 22 57 -0.96 - 65 0 0 27 30 34 0 33 14.1 24 226 -33 27 23 29 27 37 41 27 18 48 27 42 23 -0.96 - 64 0 0 27 50 24 0 33 17.0 23 226 -33 27 43 17 27 57 31 27 38 36 28 2 14 -0.96 - 63 0 0 28 10 37 0 33 19.8 22 227 -34 28 3 29 28 17 46 27 58 47 28 22 30 -0.96 - 62 0 0 28 31 15 0 33 22.5 21 227 -35 28 24 5 28 38 25 28 19 23 28 43 9 -0.96 - 61 0 0 28 52 15 0 33 25.1 20 228 -36 28 45 5 28 59 26 28 40 21 29 4 11 -0.96 - 60 0 0 29 13 38 0 33 27.6 19 229 -36 29 6 27 29 20 51 29 1 43 29 25 37 -0.96 - 59 0 0 29 35 24 0 33 29.9 18 229 -37 29 28 11 29 42 37 29 23 26 29 47 24 -0.96 - 58 0 0 29 57 31 0 33 32.2 17 230 -38 29 50 17 30 4 46 29 45 31 30 9 33 -0.96 - 57 0 0 30 19 59 0 33 34.3 16 230 -38 30 12 43 30 27 15 30 7 57 30 32 3 -0.96 - 56 0 0 30 42 47 0 33 36.3 16 231 -39 30 35 30 30 50 4 30 30 43 30 54 53 -0.96 - 55 0 0 31 5 54 0 33 38.2 15 232 -40 30 58 37 31 13 13 30 53 48 31 18 3 -0.96 - 54 0 0 31 29 21 0 33 40.0 14 232 -40 31 22 2 31 36 41 31 17 13 31 41 32 -0.96 - 53 0 0 31 53 6 0 33 41.7 13 233 -41 31 45 46 32 0 27 31 40 56 32 5 19 -0.96 - 52 0 0 32 17 9 0 33 43.2 12 233 -41 32 9 47 32 24 31 32 4 56 32 29 23 -0.97 - 51 0 0 32 41 28 0 33 44.7 11 234 -42 32 34 5 32 48 52 32 29 14 32 53 45 -0.97 - 50 0 0 33 6 3 0 33 46.0 10 234 -42 32 58 40 33 13 28 32 53 47 33 18 23 -0.97 - 49 0 0 33 30 54 0 33 47.2 9 235 -43 33 23 29 33 38 21 33 18 36 33 43 16 -0.97 - 48 0 0 33 56 0 0 33 48.2 8 236 -43 33 48 34 34 3 27 33 43 40 34 8 23 -0.97 - 47 0 0 34 21 20 0 33 49.2 7 236 -44 34 13 52 34 28 48 34 8 57 34 33 45 -0.98 - 46 0 0 34 46 52 0 33 50.0 6 237 -44 34 39 23 34 54 22 34 34 28 34 59 19 -0.98 - 45 0 0 35 12 37 0 33 50.8 5 237 -45 35 5 7 35 20 8 35 0 10 35 25 6 -0.99 - 44 0 0 35 38 33 0 33 51.4 4 238 -45 35 31 2 35 46 6 35 26 5 35 51 5 -0.99 - 43 0 0 36 4 40 0 33 51.9 4 238 -45 35 57 8 36 12 14 35 52 10 36 17 14 -1.01 - 42 0 0 36 30 57 0 33 52.2 3 239 -46 36 23 23 36 38 32 36 18 25 36 43 32 -1.03 - 41 0 0 36 57 23 0 33 52.5 2 240 -46 36 49 48 37 4 59 36 44 49 37 10 0 -1.07 - 40 0 0 37 23 57 0 33 52.6 1 240 -46 37 16 21 37 31 34 37 11 21 37 36 36 -1.22 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 337-108121 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 44 21.4955 DE: -22 44 38.667 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 44 21.4955 DE: -22 44 38.667 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.200) * V mag [mag]: 11.1 * B mag [mag]: 13.2 * Diameter [mas]: 0.60 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3898) Curlewis asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.007 distance from Earth [AU]: 3.27710 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#50 date of fit: 2023 Apr 24 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", 0.002", 91.237° remarks: * orbital elements for (3898)Curlewis : Mean anomaly = 261.0818912671 deg Arg. of pericenter = 215.9197075977 deg Long. of node = 184.1718752234 deg Inclination = 0.6591297380 deg Eccentricity = 0.1585523233 Semimajor axis = 3.1135015508 AU Perihelion dist = 2.6198486465 AU Mag: H = 12.81, G = 0.15 Epoch of elements : MJD 60582.02084450 TDT (2024 Sep 29.0208) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr24,0.90,2024,9,29,0.500267,0.027363,0.689729,11.209851,-0.448724,0.005772,-0.000133,0.000000,0.000000 -109.3103,-22.7556,170.07,-2.53,False UCAC4 337-108121,17.73930434,-22.7440741,13.16,11.09,9.97,0.6,0,,17.76416113,-22.7555873,7.78,8.45,0,0,0 3898,Curlewis,18.87,17.836,3.2771,0,0,2.175,-1.21,,1.6,0 0,260.8987,2024,9,28,215.9197,184.1719,0.6591,0.15855,3.11350,2.61985,12.80,5.0,0.15 1.330,0.0153,0.0025,91,0.0025,Known errors,0.68,0,-1,-1 20240929_108121,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org