IOTA/IOTA-ES occultation update for (9840) 1988 RQ2 / TYC 6852-01113-1 event on 2024 Nov 02, 13:01 UT Visible from Summary ------- On 2024 Nov 02 UT, the 12.3951698131015 km diameter asteroid (9840) 1988 RQ2 will occult a 8.7 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 9.57 mag to 18.26 mag (the magnitude of the asteroid) for at most 0.370 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: 96 * date and approx. time of event: 2024 Nov 02, 12:59 - 2024 Nov 02, 13:04 * geocentric midpoint of event [JD]: 2460617.04296883 * magnitude of target star: 8.69 * magnitude drop [mag]: 9.57 * estimated maximum duration [s]: 0.370 * Moon: 1 % sunlit, 43° distance * Sun: 54° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.42 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.002", 78°) * approx speed of asteroid's shadow [km/s]: 35.7054 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6852-01113-1 by 9840 1988 RQ2 on 2024 Nov 2 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 - 38 0 0 25 40 38 12 59 31.5 0 120 45 25 35 29 25 45 48 25 31 10 25 50 8 .... - 37 0 0 25 9 44 12 59 31.6 1 120 46 25 4 35 25 14 52 25 0 17 25 19 11 -0.34 - 36 0 0 24 39 9 12 59 31.7 2 121 47 24 34 2 24 44 17 24 29 45 24 48 35 -0.52 - 35 0 0 24 8 57 12 59 31.9 3 121 48 24 3 51 24 14 3 23 59 35 24 18 20 -0.60 - 34 0 0 23 39 6 12 59 32.2 5 122 49 23 34 1 23 44 12 23 29 46 23 48 28 -0.64 - 33 0 0 23 9 39 12 59 32.6 6 122 50 23 4 35 23 14 43 23 0 21 23 18 58 -0.66 - 32 0 0 22 40 36 12 59 33.0 7 122 50 22 35 33 22 45 39 22 31 20 22 49 53 -0.68 - 31 0 0 22 11 58 12 59 33.5 8 123 51 22 6 56 22 16 59 22 2 44 22 21 13 -0.69 - 30 0 0 21 43 45 12 59 34.1 9 123 52 21 38 44 21 48 46 21 34 33 21 52 58 -0.70 - 29 0 0 21 15 58 12 59 34.7 10 124 53 21 10 59 21 20 58 21 6 48 21 25 9 -0.71 - 28 0 0 20 48 39 12 59 35.4 11 124 53 20 43 40 20 53 37 20 39 31 20 57 48 -0.72 - 27 0 0 20 21 47 12 59 36.2 12 124 54 20 16 50 20 26 44 20 12 41 20 30 54 -0.72 - 26 0 0 19 55 23 12 59 37.1 13 125 54 19 50 27 20 0 20 19 46 19 20 4 28 -0.73 - 25 0 0 19 29 28 12 59 38.0 14 125 55 19 24 33 19 34 24 19 20 27 19 38 31 -0.73 - 24 0 0 19 4 3 12 59 39.1 15 126 56 18 59 9 19 8 57 18 55 3 19 13 4 -0.73 - 23 0 0 18 39 8 12 59 40.1 16 126 56 18 34 15 18 44 1 18 30 10 18 48 7 -0.74 - 22 0 0 18 14 43 12 59 41.3 17 126 57 18 9 51 18 19 35 18 5 47 18 23 40 -0.74 - 21 0 0 17 50 49 12 59 42.5 18 127 57 17 45 59 17 55 41 17 41 55 17 59 45 -0.74 - 20 0 0 17 27 27 12 59 43.8 19 127 58 17 22 37 17 32 17 17 18 35 17 36 21 -0.74 - 19 0 0 17 4 37 12 59 45.1 20 127 58 16 59 48 17 9 26 16 55 47 17 13 29 -0.74 - 18 0 0 16 42 19 12 59 46.5 21 128 58 16 37 31 16 47 8 16 33 30 16 51 9 -0.75 - 17 0 0 16 20 34 12 59 48.0 22 128 59 16 15 47 16 25 21 16 11 47 16 29 22 -0.75 - 16 0 0 15 59 22 12 59 49.5 23 129 59 15 54 36 16 4 9 15 50 37 16 8 9 -0.75 - 15 0 0 15 38 44 12 59 51.1 24 129 59 15 33 59 15 43 29 15 30 0 15 47 29 -0.75 - 14 0 0 15 18 40 12 59 52.8 25 130 59 15 13 55 15 23 24 15 9 57 15 27 23 -0.75 - 13 0 0 14 59 9 12 59 54.5 26 130 59 14 54 26 15 3 53 14 50 29 15 7 51 -0.75 - 12 0 0 14 40 14 12 59 56.3 27 130 60 14 35 31 14 44 56 14 31 34 14 48 54 -0.75 - 11 0 0 14 21 52 12 59 58.1 28 131 60 14 17 11 14 26 35 14 13 15 14 30 31 -0.76 - 10 0 0 14 4 6 13 0 0.0 28 131 60 13 59 25 14 8 48 13 55 30 14 12 44 -0.76 - 9 0 0 13 46 56 13 0 2.0 29 132 60 13 42 15 13 51 36 13 38 21 13 55 31 -0.76 - 8 0 0 13 30 20 13 0 4.0 30 132 60 13 25 41 13 35 0 13 21 47 13 38 55 -0.76 - 7 0 0 13 14 21 13 0 6.0 31 133 59 13 9 42 13 19 0 13 5 49 13 22 54 -0.76 - 6 0 0 12 58 57 13 0 8.1 32 133 59 12 54 19 13 3 35 12 50 26 13 7 29 -0.76 - 5 0 0 12 44 10 13 0 10.3 33 134 59 12 39 32 12 48 47 12 35 40 12 52 40 -0.76 - 4 0 0 12 29 58 13 0 12.5 34 134 59 12 25 21 12 34 35 12 21 30 12 38 27 -0.76 - 3 0 0 12 16 23 13 0 14.7 35 135 58 12 11 47 12 21 0 12 7 56 12 24 51 -0.76 - 2 0 0 12 3 25 13 0 17.0 36 136 58 11 58 49 12 8 1 11 54 59 12 11 52 -0.76 - 1 0 0 11 51 3 13 0 19.4 36 136 58 11 46 28 11 55 38 11 42 38 11 59 29 -0.76 0 0 0 11 39 18 13 0 21.7 37 137 57 11 34 44 11 43 53 11 30 54 11 47 43 -0.76 1 0 0 11 28 10 13 0 24.2 38 138 57 11 23 36 11 32 44 11 19 47 11 36 34 -0.76 2 0 0 11 17 39 13 0 26.6 39 138 56 11 13 6 11 22 13 11 9 17 11 26 3 -0.77 3 0 0 11 7 45 13 0 29.1 40 139 56 11 3 12 11 12 19 10 59 24 11 16 8 -0.77 4 0 0 10 58 29 13 0 31.7 40 140 55 10 53 56 11 3 2 10 50 8 11 6 50 -0.77 5 0 0 10 49 49 13 0 34.3 41 140 55 10 45 17 10 54 22 10 41 29 10 58 10 -0.77 6 0 0 10 41 47 13 0 36.9 42 141 54 10 37 16 10 46 20 10 33 28 10 50 8 -0.77 7 0 0 10 34 23 13 0 39.5 43 142 54 10 29 51 10 38 55 10 26 4 10 42 43 -0.77 8 0 0 10 27 36 13 0 42.2 43 143 53 10 23 5 10 32 7 10 19 18 10 35 55 -0.77 9 0 0 10 21 26 13 0 44.9 44 144 52 10 16 56 10 25 58 10 13 9 10 29 45 -0.77 10 0 0 10 15 55 13 0 47.7 45 145 52 10 11 24 10 20 26 10 7 37 10 24 13 -0.77 11 0 0 10 11 1 13 0 50.5 45 146 51 10 6 30 10 15 31 10 2 44 10 19 18 -0.77 12 0 0 10 6 44 13 0 53.3 46 147 50 10 2 14 10 11 15 9 58 28 10 15 1 -0.77 13 0 0 10 3 5 13 0 56.1 46 148 49 9 58 35 10 7 36 9 54 49 10 11 22 -0.77 14 0 0 10 0 4 13 0 59.0 47 149 49 9 55 34 10 4 35 9 51 49 10 8 21 -0.77 15 0 0 9 57 41 13 1 1.9 48 150 48 9 53 11 10 2 11 9 49 26 10 5 58 -0.77 16 0 0 9 55 56 13 1 4.8 48 151 47 9 51 26 10 0 26 9 47 40 10 4 12 -0.77 17 0 0 9 54 48 13 1 7.7 49 152 46 9 50 19 9 59 18 9 46 33 10 3 5 -0.77 18 0 0 9 54 19 13 1 10.7 49 153 45 9 49 49 9 58 49 9 46 3 10 2 35 -0.77 19 0 0 9 54 27 13 1 13.7 49 154 45 9 49 57 9 58 57 9 46 11 10 2 43 -0.77 20 0 0 9 55 13 13 1 16.7 50 156 44 9 50 43 9 59 43 9 46 57 10 3 29 -0.77 21 0 0 9 56 37 13 1 19.7 50 157 43 9 52 7 10 1 7 9 48 21 10 4 54 -0.77 22 0 0 9 58 39 13 1 22.7 51 158 42 9 54 9 10 3 9 9 50 23 10 6 56 -0.77 23 0 0 10 1 18 13 1 25.8 51 160 41 9 56 48 10 5 49 9 53 2 10 9 35 -0.77 24 0 0 10 4 36 13 1 28.8 51 161 40 10 0 6 10 9 6 9 56 20 10 12 53 -0.77 25 0 0 10 8 31 13 1 31.9 51 162 39 10 4 1 10 13 2 10 0 15 10 16 49 -0.77 26 0 0 10 13 5 13 1 35.0 52 164 38 10 8 34 10 17 36 10 4 47 10 21 23 -0.77 27 0 0 10 18 16 13 1 38.1 52 165 37 10 13 45 10 22 47 10 9 58 10 26 34 -0.77 28 0 0 10 24 5 13 1 41.2 52 167 37 10 19 33 10 28 36 10 15 47 10 32 24 -0.77 29 0 0 10 30 31 13 1 44.3 52 168 36 10 26 0 10 35 3 10 22 13 10 38 51 -0.77 30 0 0 10 37 36 13 1 47.4 52 170 35 10 33 4 10 42 8 10 29 16 10 45 56 -0.77 31 0 0 10 45 18 13 1 50.6 52 171 34 10 40 45 10 49 50 10 36 58 10 53 39 -0.77 32 0 0 10 53 37 13 1 53.7 52 173 33 10 49 5 10 58 10 10 45 17 11 1 59 -0.78 33 0 0 11 2 35 13 1 56.8 52 174 32 10 58 2 11 7 8 10 54 13 11 10 57 -0.78 34 0 0 11 12 10 13 2 0.0 52 176 31 11 7 36 11 16 43 11 3 47 11 20 33 -0.78 35 0 0 11 22 22 13 2 3.1 52 177 30 11 17 48 11 26 56 11 13 59 11 30 46 -0.78 36 0 0 11 33 12 13 2 6.2 52 178 29 11 28 37 11 37 46 11 24 47 11 41 37 -0.78 37 0 0 11 44 39 13 2 9.4 52 180 28 11 40 4 11 49 14 11 36 13 11 53 5 -0.78 38 0 0 11 56 43 13 2 12.5 51 181 27 11 52 7 12 1 19 11 48 17 12 5 10 -0.78 39 0 0 12 9 24 13 2 15.6 51 183 26 12 4 48 12 14 0 12 0 57 12 17 52 -0.78 40 0 0 12 22 42 13 2 18.7 51 184 25 12 18 6 12 27 19 12 14 14 12 31 12 -0.78 41 0 0 12 36 38 13 2 21.8 51 186 24 12 32 0 12 41 15 12 28 8 12 45 8 -0.78 42 0 0 12 51 10 13 2 24.9 50 187 23 12 46 32 12 55 48 12 42 39 12 59 41 -0.78 43 0 0 13 6 18 13 2 28.0 50 188 22 13 1 39 13 10 57 12 57 46 13 14 51 -0.78 44 0 0 13 22 3 13 2 31.1 49 190 21 13 17 24 13 26 43 13 13 30 13 30 37 -0.78 45 0 0 13 38 24 13 2 34.1 49 191 20 13 33 44 13 43 5 13 29 50 13 47 0 -0.78 46 0 0 13 55 22 13 2 37.2 49 192 19 13 50 41 14 0 3 13 46 46 14 3 59 -0.78 47 0 0 14 12 55 13 2 40.2 48 194 18 14 8 13 14 17 37 14 4 17 14 21 33 -0.78 48 0 0 14 31 4 13 2 43.2 48 195 17 14 26 21 14 35 46 14 22 25 14 39 44 -0.78 49 0 0 14 49 48 13 2 46.2 47 196 16 14 45 4 14 54 31 14 41 7 14 58 29 -0.78 50 0 0 15 9 7 13 2 49.1 46 197 15 15 4 23 15 13 52 15 0 25 15 17 50 -0.78 51 0 0 15 29 1 13 2 52.1 46 198 14 15 24 16 15 33 47 15 20 17 15 37 46 -0.78 52 0 0 15 49 30 13 2 55.0 45 199 13 15 44 44 15 54 16 15 40 44 15 58 16 -0.78 53 0 0 16 10 33 13 2 57.8 44 200 12 16 5 46 16 15 20 16 1 45 16 19 21 -0.78 54 0 0 16 32 9 13 3 0.7 44 201 11 16 27 21 16 36 58 16 23 20 16 40 59 -0.78 55 0 0 16 54 20 13 3 3.5 43 202 10 16 49 31 16 59 9 16 45 29 17 3 11 -0.78 56 0 0 17 17 3 13 3 6.3 42 203 9 17 12 13 17 21 53 17 8 10 17 25 57 -0.78 57 0 0 17 40 19 13 3 9.0 42 204 8 17 35 28 17 45 10 17 31 25 17 49 15 -0.78 58 0 0 18 4 8 13 3 11.7 41 205 6 17 59 16 18 9 0 17 55 11 18 13 5 -0.78 59 0 0 18 28 28 13 3 14.4 40 206 5 18 23 35 18 33 21 18 19 30 18 37 27 -0.78 60 0 0 18 53 19 13 3 17.0 39 207 4 18 48 25 18 58 14 18 44 19 19 2 21 -0.78 61 0 0 19 18 42 13 3 19.6 38 208 3 19 13 46 19 23 37 19 9 40 19 27 45 -0.78 62 0 0 19 44 34 13 3 22.1 38 209 2 19 39 38 19 49 31 19 35 30 19 53 39 -0.78 63 0 0 20 10 56 13 3 24.6 37 210 1 20 5 59 20 15 54 20 1 50 20 20 4 -0.78 64 0 0 20 37 48 13 3 27.1 36 210 0 20 32 49 20 42 46 20 28 39 20 46 57 -0.78 65 0 0 21 5 7 13 3 29.5 35 211 -1 21 0 8 21 10 7 20 55 57 21 14 19 -0.78 66 0 0 21 32 55 13 3 31.8 34 212 -2 21 27 54 21 37 56 21 23 43 21 42 8 -0.78 67 0 0 22 1 9 13 3 34.1 33 213 -3 21 56 8 22 6 12 21 51 55 22 10 25 -0.78 68 0 0 22 29 50 13 3 36.3 32 213 -4 22 24 47 22 34 54 22 20 34 22 39 8 -0.78 69 0 0 22 58 57 13 3 38.5 31 214 -5 22 53 53 23 4 1 22 49 38 23 8 16 -0.78 70 0 0 23 28 28 13 3 40.7 31 215 -6 23 23 23 23 33 33 23 19 7 23 37 50 -0.78 71 0 0 23 58 23 13 3 42.7 30 215 -7 23 53 17 24 3 30 23 49 0 24 7 47 -0.78 72 0 0 24 28 41 13 3 44.7 29 216 -8 24 23 34 24 33 49 24 19 17 24 38 8 -0.78 73 0 0 24 59 22 13 3 46.7 28 217 -9 24 54 13 25 4 31 24 49 55 25 8 50 -0.78 74 0 0 25 30 24 13 3 48.6 27 217 -10 25 25 14 25 35 34 25 20 55 25 39 54 -0.78 75 0 0 26 1 46 13 3 50.4 26 218 -11 25 56 35 26 6 58 25 52 15 26 11 19 -0.78 76 0 0 26 33 28 13 3 52.1 25 219 -12 26 28 16 26 38 40 26 23 55 26 43 3 -0.78 77 0 0 27 5 28 13 3 53.8 24 219 -13 27 0 15 27 10 42 26 55 53 27 15 5 -0.78 78 0 0 27 37 46 13 3 55.5 23 220 -14 27 32 31 27 43 0 27 28 8 27 47 24 -0.78 79 0 0 28 10 20 13 3 57.0 22 221 -15 28 5 4 28 15 35 28 0 40 28 20 0 -0.78 80 0 0 28 43 8 13 3 58.5 21 221 -16 28 37 52 28 48 25 28 33 27 28 52 51 -0.78 81 0 0 29 16 11 13 3 59.9 20 222 -17 29 10 54 29 21 29 29 6 28 29 25 56 -0.78 82 0 0 29 49 27 13 4 1.3 19 222 -18 29 44 8 29 54 46 29 39 42 29 59 13 -0.78 83 0 0 30 22 54 13 4 2.6 18 223 -19 30 17 35 30 28 15 30 13 8 30 32 43 -0.78 84 0 0 30 56 33 13 4 3.8 17 224 -20 30 51 13 31 1 54 30 46 44 31 6 23 -0.78 85 0 0 31 30 21 13 4 4.9 16 224 -20 31 25 0 31 35 43 31 20 31 31 40 13 -0.78 86 0 0 32 4 18 13 4 6.0 15 225 -21 31 58 55 32 9 40 31 54 25 32 14 11 -0.78 87 0 0 32 38 21 13 4 6.9 14 225 -22 32 32 58 32 43 45 32 28 27 32 48 16 -0.78 88 0 0 33 12 30 13 4 7.9 13 226 -23 33 7 6 33 17 55 33 2 35 33 22 27 -0.78 89 0 0 33 46 44 13 4 8.7 12 226 -24 33 41 19 33 52 10 33 36 47 33 56 43 -0.78 90 0 0 34 21 1 13 4 9.5 11 227 -25 34 15 35 34 26 28 34 11 2 34 31 1 -0.78 91 0 0 34 55 20 13 4 10.2 10 228 -26 34 49 54 35 0 48 34 45 20 35 5 22 -0.78 92 0 0 35 29 40 13 4 10.8 9 228 -27 35 24 13 35 35 8 35 19 39 35 39 43 -0.79 93 0 0 36 4 0 13 4 11.4 8 229 -27 35 58 32 36 9 29 35 53 57 36 14 4 -0.79 94 0 0 36 38 18 13 4 11.9 7 229 -28 36 32 49 36 43 48 36 28 14 36 48 24 -0.79 95 0 0 37 12 33 13 4 12.3 6 230 -29 37 7 4 37 18 3 37 2 28 37 22 40 -0.79 96 0 0 37 46 44 13 4 12.7 5 231 -30 37 41 14 37 52 14 37 36 38 37 56 52 -0.80 97 0 0 38 20 49 13 4 13.0 4 231 -30 38 15 19 38 26 20 38 10 42 38 30 58 -0.81 98 0 0 38 54 48 13 4 13.2 3 232 -31 38 49 17 39 0 20 38 44 40 39 4 58 -0.82 99 0 0 39 28 40 13 4 13.4 2 233 -32 39 23 8 39 34 12 39 18 31 39 38 50 -0.84 100 0 0 40 2 22 13 4 13.5 1 233 -33 39 56 50 40 7 55 39 52 13 40 12 33 -0.89 101 0 0 40 35 55 13 4 13.5 0 234 -33 40 30 22 40 41 27 40 25 44 40 46 6 -1.65 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6852-01113-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 17 54.6266 DE: -26 37 50.797 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 17 54.6265 DE: -26 37 50.797 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 8.7 * B mag [mag]: 9.6 * Diameter [mas]: 0.30 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (9840) 1988 RQ2 asteroid class: approx. diameter [km]: 12 approx. diameter ["]: 0.005 distance from Earth [AU]: 3.22560 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 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): 0.011", 0.002", 78.127° remarks: * orbital elements for (9840)1988 RQ2 : Mean anomaly = 79.5336352814 deg Arg. of pericenter = 251.9189467276 deg Long. of node = 311.0793698083 deg Inclination = 10.9177280860 deg Eccentricity = 0.0704207444 Semimajor axis = 2.7806326514 AU Perihelion dist = 2.5848184302 AU Mag: H = 12.62, G = 0.15 Epoch of elements : MJD 60616.54296859 TDT (2024 Nov 02.5430) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr25,0.37,2024,11,2,13.031252,-0.093769,0.605171,19.917877,3.070279,0.004731,-0.000036,-0.000001,0.000000 37.0963,-26.6225,-19.58,-15.00,False TYC 6852-01113-1,18.29850743,-26.6307771,9.59,8.69,8.20,0.3,0,,18.32401525,-26.6224502,9.57,9.61,0,0,0 9840,1988 RQ2,18.26,13.097,3.2256,0,0,4.050,8.38,,1.2,0 0,79.4182,2024,11,2,251.9189,311.0794,10.9177,0.07042,2.78063,2.58482,12.62,5.0,0.15 1.419,0.0113,0.0022,78,0.0023,Known errors,0.81,0,-1,-1 20241102_1113-1,60140.68 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:13 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org