IOTA/IOTA-ES occultation update for (644) Cosima / UCAC4 402-129758 event on 2024 Nov 13, 03:52 UT Visible from Summary ------- On 2024 Nov 13 UT, the 18.325 km diameter asteroid (644) Cosima will occult a 11.7 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.17 mag to 14.84 mag (the magnitude of the asteroid) for at most 1.760 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 Nov 13, 03:42 - 2024 Nov 13, 04:02 * geocentric midpoint of event [JD]: 2460627.66142034 * magnitude of target star: 11.73 * magnitude drop [mag]: 3.17 * estimated maximum duration [s]: 1.760 * Moon: 89 % sunlit, 34° distance * Sun: 108° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 19 * 1 sigma uncertainty interval [path widths]: +/- 0.14 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.002", 70°) * approx speed of asteroid's shadow [km/s]: 10.4068 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 402-129758 by 644 Cosima on 2024 Nov 13 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 142 0 0 - 4 14 19 3 42 49.6 0 99 65 - 4 19 39 - 4 8 59 - 4 21 6 - 4 7 32 .... 143 0 0 - 4 24 3 3 42 49.7 1 99 64 - 4 29 23 - 4 18 43 - 4 30 49 - 4 17 16 -0.16 144 0 0 - 4 33 18 3 42 50.1 2 99 63 - 4 38 38 - 4 27 59 - 4 40 4 - 4 26 32 -0.25 145 0 0 - 4 42 6 3 42 50.6 3 99 62 - 4 47 25 - 4 36 47 - 4 48 51 - 4 35 20 -0.28 146 0 0 - 4 50 25 3 42 51.4 4 99 62 - 4 55 44 - 4 45 6 - 4 57 10 - 4 43 40 -0.30 147 0 0 - 4 58 16 3 42 52.3 5 99 61 - 5 3 35 - 4 52 58 - 5 5 1 - 4 51 31 -0.31 148 0 0 - 5 5 39 3 42 53.5 6 99 60 - 5 10 57 - 5 0 20 - 5 12 23 - 4 58 54 -0.32 149 0 0 - 5 12 33 3 42 54.9 7 99 59 - 5 17 51 - 5 7 14 - 5 19 17 - 5 5 48 -0.32 150 0 0 - 5 18 58 3 42 56.4 8 99 58 - 5 24 16 - 5 13 40 - 5 25 41 - 5 12 14 -0.33 151 0 0 - 5 24 54 3 42 58.2 9 99 57 - 5 30 12 - 5 19 36 - 5 31 37 - 5 18 10 -0.33 152 0 0 - 5 30 21 3 43 0.1 10 99 57 - 5 35 39 - 5 25 4 - 5 37 4 - 5 23 38 -0.33 153 0 0 - 5 35 20 3 43 2.3 11 99 56 - 5 40 37 - 5 30 2 - 5 42 3 - 5 28 36 -0.34 154 0 0 - 5 39 49 3 43 4.6 12 98 55 - 5 45 6 - 5 34 32 - 5 46 32 - 5 33 6 -0.34 155 0 0 - 5 43 49 3 43 7.2 13 98 54 - 5 49 6 - 5 38 32 - 5 50 32 - 5 37 6 -0.34 156 0 0 - 5 47 20 3 43 9.9 14 98 53 - 5 52 37 - 5 42 3 - 5 54 2 - 5 40 37 -0.34 157 0 0 - 5 50 21 3 43 12.9 15 98 52 - 5 55 38 - 5 45 4 - 5 57 3 - 5 43 38 -0.34 158 0 0 - 5 52 53 3 43 16.0 16 98 51 - 5 58 9 - 5 47 36 - 5 59 35 - 5 46 10 -0.34 159 0 0 - 5 54 55 3 43 19.3 17 98 50 - 6 0 12 - 5 49 38 - 6 1 37 - 5 48 13 -0.35 160 0 0 - 5 56 28 3 43 22.8 18 98 49 - 6 1 44 - 5 51 11 - 6 3 10 - 5 49 45 -0.35 161 0 0 - 5 57 30 3 43 26.6 19 98 48 - 6 2 47 - 5 52 14 - 6 4 13 - 5 50 48 -0.35 162 0 0 - 5 58 4 3 43 30.5 20 98 47 - 6 3 20 - 5 52 47 - 6 4 46 - 5 51 21 -0.35 163 0 0 - 5 58 7 3 43 34.6 21 98 47 - 6 3 23 - 5 52 50 - 6 4 49 - 5 51 24 -0.35 164 0 0 - 5 57 40 3 43 38.9 22 98 46 - 6 2 57 - 5 52 23 - 6 4 22 - 5 50 58 -0.35 165 0 0 - 5 56 43 3 43 43.3 23 98 45 - 6 2 0 - 5 51 26 - 6 3 26 - 5 50 1 -0.35 166 0 0 - 5 55 17 3 43 48.0 24 98 44 - 6 0 33 - 5 49 59 - 6 1 59 - 5 48 34 -0.35 167 0 0 - 5 53 20 3 43 52.9 25 98 43 - 5 58 37 - 5 48 2 - 6 0 2 - 5 46 37 -0.35 168 0 0 - 5 50 52 3 43 57.9 26 98 42 - 5 56 10 - 5 45 35 - 5 57 35 - 5 44 9 -0.35 169 0 0 - 5 47 55 3 44 3.1 27 98 41 - 5 53 12 - 5 42 38 - 5 54 38 - 5 41 12 -0.35 170 0 0 - 5 44 27 3 44 8.5 28 98 40 - 5 49 45 - 5 39 10 - 5 51 11 - 5 37 44 -0.36 171 0 0 - 5 40 29 3 44 14.1 29 98 39 - 5 45 47 - 5 35 11 - 5 47 13 - 5 33 46 -0.36 172 0 0 - 5 36 1 3 44 19.9 30 98 38 - 5 41 19 - 5 30 43 - 5 42 45 - 5 29 17 -0.36 173 0 0 - 5 31 2 3 44 25.9 31 98 37 - 5 36 20 - 5 25 44 - 5 37 46 - 5 24 18 -0.36 174 0 0 - 5 25 33 3 44 32.1 32 98 36 - 5 30 51 - 5 20 14 - 5 32 17 - 5 18 48 -0.36 175 0 0 - 5 19 33 3 44 38.4 33 98 35 - 5 24 51 - 5 14 14 - 5 26 17 - 5 12 47 -0.36 176 0 0 - 5 13 2 3 44 44.9 34 98 34 - 5 18 21 - 5 7 43 - 5 19 47 - 5 6 17 -0.36 177 0 0 - 5 6 1 3 44 51.6 35 98 33 - 5 11 20 - 5 0 41 - 5 12 47 - 4 59 15 -0.36 178 0 0 - 4 58 29 3 44 58.5 36 98 32 - 5 3 49 - 4 53 9 - 5 5 15 - 4 51 43 -0.36 179 0 0 - 4 50 27 3 45 5.5 37 98 31 - 4 55 47 - 4 45 6 - 4 57 13 - 4 43 40 -0.36 -180 0 0 - 4 41 54 3 45 12.8 38 98 30 - 4 47 14 - 4 36 33 - 4 48 41 - 4 35 6 -0.36 -179 0 0 - 4 32 50 3 45 20.2 39 99 29 - 4 38 11 - 4 27 29 - 4 39 38 - 4 26 2 -0.36 -178 0 0 - 4 23 15 3 45 27.7 40 99 28 - 4 28 37 - 4 17 54 - 4 30 4 - 4 16 27 -0.36 -177 0 0 - 4 13 10 3 45 35.5 41 99 27 - 4 18 32 - 4 7 48 - 4 19 59 - 4 6 21 -0.36 -176 0 0 - 4 2 35 3 45 43.4 42 99 26 - 4 7 57 - 3 57 12 - 4 9 24 - 3 55 45 -0.36 -175 0 0 - 3 51 28 3 45 51.5 43 99 25 - 3 56 51 - 3 46 5 - 3 58 18 - 3 44 38 -0.36 -174 0 0 - 3 39 51 3 45 59.8 44 100 24 - 3 45 15 - 3 34 28 - 3 46 42 - 3 33 0 -0.36 -173 0 0 - 3 27 44 3 46 8.2 45 100 22 - 3 33 8 - 3 22 19 - 3 34 35 - 3 20 52 -0.36 -172 0 0 - 3 15 5 3 46 16.8 46 100 21 - 3 20 30 - 3 9 41 - 3 21 57 - 3 8 13 -0.36 -171 0 0 - 3 1 57 3 46 25.6 47 101 20 - 3 7 22 - 2 56 31 - 3 8 50 - 2 55 4 -0.36 -170 0 0 - 2 48 18 3 46 34.5 48 101 19 - 2 53 43 - 2 42 52 - 2 55 11 - 2 41 24 -0.36 -169 0 0 - 2 34 8 3 46 43.5 49 102 18 - 2 39 35 - 2 28 42 - 2 41 3 - 2 27 14 -0.36 -168 0 0 - 2 19 29 3 46 52.8 50 102 17 - 2 24 56 - 2 14 2 - 2 26 24 - 2 12 33 -0.36 -167 0 0 - 2 4 19 3 47 2.2 51 103 16 - 2 9 47 - 1 58 51 - 2 11 15 - 1 57 23 -0.36 -166 0 0 - 1 48 39 3 47 11.7 52 103 15 - 1 54 7 - 1 43 11 - 1 55 36 - 1 41 42 -0.36 -165 0 0 - 1 32 30 3 47 21.4 53 104 14 - 1 37 58 - 1 27 0 - 1 39 27 - 1 25 32 -0.36 -164 0 0 - 1 15 50 3 47 31.2 54 104 13 - 1 21 20 - 1 10 20 - 1 22 49 - 1 8 51 -0.36 -163 0 0 - 0 58 41 3 47 41.2 55 105 12 - 1 4 11 - 0 53 11 - 1 5 41 - 0 51 41 -0.36 -162 0 0 - 0 41 3 3 47 51.3 56 106 11 - 0 46 34 - 0 35 31 - 0 48 3 - 0 34 2 -0.36 -161 0 0 - 0 22 55 3 48 1.6 57 107 10 - 0 28 27 - 0 17 23 - 0 29 56 - 0 15 53 -0.36 -160 0 0 - 0 4 18 3 48 12.0 58 108 9 - 0 9 51 0 1 14 - 0 11 21 0 2 44 -0.36 -159 0 0 0 14 47 3 48 22.5 59 109 8 0 9 14 0 20 20 0 7 44 0 21 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5 35 9 5 22 7 5 36 42 -0.36 -144 0 0 5 54 59 3 51 13.1 69 137 -9 5 49 14 6 0 44 5 47 41 6 2 17 -0.36 -143 0 0 6 20 55 3 51 25.1 69 140 -10 6 15 9 6 26 41 6 13 36 6 28 15 -0.36 -142 0 0 6 47 13 3 51 37.2 70 143 -11 6 41 27 6 53 0 6 39 53 6 54 33 -0.36 -141 0 0 7 13 52 3 51 49.2 70 146 -13 7 8 4 7 19 39 7 6 31 7 21 13 -0.36 -140 0 0 7 40 50 3 52 1.3 70 149 -14 7 35 2 7 46 38 7 33 28 7 48 12 -0.36 -139 0 0 8 8 8 3 52 13.5 70 153 -15 8 2 19 8 13 57 8 0 45 8 15 31 -0.36 -138 0 0 8 35 44 3 52 25.6 70 156 -16 8 29 55 8 41 34 8 28 21 8 43 8 -0.36 -137 0 0 9 3 38 3 52 37.8 70 159 -17 8 57 48 9 9 28 8 56 14 9 11 3 -0.36 -136 0 0 9 31 49 3 52 49.9 70 163 -18 9 25 59 9 37 40 9 24 24 9 39 15 -0.36 -135 0 0 10 0 16 3 53 2.1 70 166 -19 9 54 25 10 6 8 9 52 50 10 7 43 -0.36 -134 0 0 10 28 59 3 53 14.2 70 169 -20 10 23 7 10 34 51 10 21 32 10 36 26 -0.36 -133 0 0 10 57 56 3 53 26.4 69 172 -22 10 52 3 11 3 49 10 50 28 11 5 24 -0.36 -132 0 0 11 27 7 3 53 38.4 69 175 -23 11 21 13 11 33 0 11 19 38 11 34 35 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52 3 58 20.5 48 219 -50 24 26 54 24 38 50 24 25 18 24 40 26 -0.35 -105 0 0 25 2 7 3 58 29.4 47 220 -51 24 56 10 25 8 4 24 54 33 25 9 41 -0.35 -104 0 0 25 31 9 3 58 38.1 46 221 -52 25 25 13 25 37 7 25 23 36 25 38 43 -0.35 -103 0 0 25 59 59 3 58 46.6 45 222 -53 25 54 2 26 5 55 25 52 26 26 7 32 -0.35 -102 0 0 26 28 34 3 58 54.9 44 223 -54 26 22 37 26 34 30 26 21 1 26 36 6 -0.35 -101 0 0 26 56 54 3 59 3.0 43 224 -55 26 50 58 27 2 50 26 49 22 27 4 26 -0.35 -100 0 0 27 24 59 3 59 10.9 42 224 -55 27 19 4 27 30 55 27 17 28 27 32 31 -0.35 - 99 0 0 27 52 48 3 59 18.6 41 225 -56 27 46 53 27 58 43 27 45 17 28 0 19 -0.35 - 98 0 0 28 20 21 3 59 26.2 40 226 -57 28 14 26 28 26 15 28 12 50 28 27 51 -0.34 - 97 0 0 28 47 36 3 59 33.5 39 227 -58 28 41 42 28 53 30 28 40 6 28 55 6 -0.34 - 96 0 0 29 14 33 3 59 40.7 38 227 -59 29 8 40 29 20 27 29 7 4 29 22 2 -0.34 - 95 0 0 29 41 12 3 59 47.6 37 228 -59 29 35 19 29 47 5 29 33 44 29 48 41 -0.34 - 94 0 0 30 7 33 3 59 54.4 36 229 -60 30 1 40 30 13 25 30 0 5 30 15 0 -0.34 - 93 0 0 30 33 34 4 0 0.9 35 229 -61 30 27 42 30 39 26 30 26 7 30 41 1 -0.34 - 92 0 0 30 59 15 4 0 7.3 34 230 -61 30 53 24 31 5 7 30 51 49 31 6 41 -0.34 - 91 0 0 31 24 37 4 0 13.5 33 231 -62 31 18 46 31 30 27 31 17 12 31 32 2 -0.34 - 90 0 0 31 49 38 4 0 19.4 33 231 -63 31 43 48 31 55 28 31 42 13 31 57 2 -0.34 - 89 0 0 32 14 18 4 0 25.2 32 232 -63 32 8 29 32 20 7 32 6 54 32 21 42 -0.34 - 88 0 0 32 38 37 4 0 30.8 31 233 -64 32 32 48 32 44 26 32 31 14 32 46 0 -0.34 - 87 0 0 33 2 34 4 0 36.2 30 234 -65 32 56 46 33 8 22 32 55 13 33 9 56 -0.34 - 86 0 0 33 26 10 4 0 41.4 29 234 -65 33 20 23 33 31 58 33 18 49 33 33 31 -0.34 - 85 0 0 33 49 24 4 0 46.5 28 235 -66 33 43 38 33 55 11 33 42 4 33 56 44 -0.34 - 84 0 0 34 12 16 4 0 51.3 27 235 -66 34 6 30 34 18 2 34 4 57 34 19 35 -0.34 - 83 0 0 34 34 45 4 0 56.0 26 236 -66 34 29 0 34 40 30 34 27 27 34 42 3 -0.34 - 82 0 0 34 56 52 4 1 0.5 25 237 -67 34 51 7 35 2 36 34 49 34 35 4 9 -0.35 - 81 0 0 35 18 36 4 1 4.8 24 237 -67 35 12 52 35 24 19 35 11 19 35 25 52 -0.35 - 80 0 0 35 39 56 4 1 8.9 23 238 -68 35 34 14 35 45 39 35 32 41 35 47 12 -0.35 - 79 0 0 36 0 54 4 1 12.9 22 239 -68 35 55 12 36 6 37 35 53 40 36 8 9 -0.35 - 78 0 0 36 21 29 4 1 16.7 22 239 -68 36 15 48 36 27 11 36 14 16 36 28 43 -0.35 - 77 0 0 36 41 41 4 1 20.3 21 240 -68 36 36 0 36 47 21 36 34 28 36 48 54 -0.35 - 76 0 0 37 1 29 4 1 23.7 20 241 -68 36 55 49 37 7 9 36 54 17 37 8 41 -0.35 - 75 0 0 37 20 54 4 1 27.0 19 241 -69 37 15 15 37 26 33 37 13 43 37 28 5 -0.35 - 74 0 0 37 39 55 4 1 30.1 18 242 -69 37 34 17 37 45 34 37 32 46 37 47 5 -0.35 - 73 0 0 37 58 33 4 1 33.1 17 243 -69 37 52 56 38 4 11 37 51 24 38 5 42 -0.35 - 72 0 0 38 16 48 4 1 35.9 16 243 -69 38 11 11 38 22 25 38 9 40 38 23 56 -0.35 - 71 0 0 38 34 39 4 1 38.6 16 244 -69 38 29 3 38 40 15 38 27 32 38 41 46 -0.35 - 70 0 0 38 52 6 4 1 41.1 15 245 -69 38 46 31 38 57 42 38 45 0 38 59 12 -0.35 - 69 0 0 39 9 10 4 1 43.4 14 245 -69 39 3 36 39 14 45 39 2 5 39 16 15 -0.35 - 68 0 0 39 25 51 4 1 45.6 13 246 -68 39 20 17 39 31 25 39 18 47 39 32 55 -0.35 - 67 0 0 39 42 8 4 1 47.6 12 247 -68 39 36 35 39 47 42 39 35 5 39 49 12 -0.35 - 66 0 0 39 58 2 4 1 49.6 11 247 -68 39 52 30 40 3 35 39 51 0 40 5 5 -0.35 - 65 0 0 40 13 33 4 1 51.3 11 248 -68 40 8 1 40 19 5 40 6 32 40 20 34 -0.35 - 64 0 0 40 28 40 4 1 53.0 10 249 -68 40 23 9 40 34 11 40 21 40 40 35 41 -0.35 - 63 0 0 40 43 25 4 1 54.4 9 249 -67 40 37 54 40 48 55 40 36 25 40 50 24 -0.35 - 62 0 0 40 57 46 4 1 55.8 8 250 -67 40 52 16 41 3 16 40 50 47 41 4 45 -0.35 - 61 0 0 41 11 44 4 1 57.0 7 251 -67 41 6 15 41 17 13 41 4 46 41 18 42 -0.35 - 60 0 0 41 25 19 4 1 58.1 7 251 -66 41 19 51 41 30 48 41 18 22 41 32 17 -0.35 - 59 0 0 41 38 32 4 1 59.1 6 252 -66 41 33 4 41 44 0 41 31 36 41 45 28 -0.36 - 58 0 0 41 51 22 4 1 59.9 5 253 -66 41 45 54 41 56 49 41 44 26 41 58 17 -0.36 - 57 0 0 42 3 49 4 2 0.7 4 253 -65 41 58 22 42 9 15 41 56 54 42 10 44 -0.36 - 56 0 0 42 15 53 4 2 1.3 4 254 -65 42 10 27 42 21 19 42 8 59 42 22 47 -0.36 - 55 0 0 42 27 35 4 2 1.7 3 255 -64 42 22 10 42 33 1 42 20 42 42 34 29 -0.37 - 54 0 0 42 38 55 4 2 2.1 2 255 -64 42 33 30 42 44 20 42 32 3 42 45 48 -0.37 - 53 0 0 42 49 53 4 2 2.3 1 256 -63 42 44 29 42 55 17 42 43 1 42 56 45 -0.39 - 52 0 0 43 0 28 4 2 2.5 1 257 -63 42 55 4 43 5 52 42 53 37 43 7 19 -0.45 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 402-129758 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 22 42 19.2012 DE: -09 36 11.343 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 22 42 19.2010 DE: -09 36 11.344 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.7 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (644) Cosima asteroid class: approx. diameter [km]: 18 approx. diameter ["]: 0.015 distance from Earth [AU]: 1.70040 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#59 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): 0.016", 0.002", 70.491° remarks: * orbital elements for (644)Cosima : Mean anomaly = 348.7776768009 deg Arg. of pericenter = 269.1885774810 deg Long. of node = 109.9844630148 deg Inclination = 1.0411333653 deg Eccentricity = 0.1537479349 Semimajor axis = 2.5989795734 AU Perihelion dist = 2.1993918311 AU Mag: H = 10.80, G = 0.15 Epoch of elements : MJD 60627.16142050 TDT (2024 Nov 13.1614) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#592023Apr24,1.76,2024,11,13,3.874088,-0.136659,0.308319,5.368732,2.383107,0.004915,0.002034,0.000000,0.000000 -129.9650,-9.4731,117.97,-18.08,False UCAC4 402-129758,22.70533368,-9.6031507,11.96,11.73,11.61,0.0,0,,22.72717139,-9.4730677,3.17,2.86,0,0,0 644,Cosima,14.84,18.325,1.7004,0,0,1.877,12.33,,1.2,0 0,348.7397,2024,11,13,269.1886,109.9845,1.0411,0.15375,2.59898,2.19939,10.80,5.0,0.15 1.135,0.0160,0.0016,70,0.0020,Known errors,1.10,0,-1,-1 20241113_129758,60140.70 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:41 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org