IOTA/IOTA-ES occultation update for (101955) Bennu / TYC 6850-01892-1 event on 2023 Feb 17, 10:16 UT Visible from SE USA, Carribean Summary ------- On 2023 Feb 17 UT, the 0.3 km diameter asteroid (101955) Bennu will occult a 9.0 mag star in the constellation Sagittarius for observers along a path across SE USA, Carribean. In the case of an occultation, the combined light of the asteroid and the star will drop by 14.82 mag to 23.78 mag (the magnitude of the asteroid) for at most 0.050 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: 48 * date and approx. time of event: 2023 Feb 17, 10:13 - 2023 Feb 17, 10:18 * geocentric midpoint of event [JD]: 2459992.92798120 * magnitude of target star: 8.96 * magnitude drop [mag]: 14.82 * estimated maximum duration [s]: 0.050 * Moon: 12 % sunlit, 17° distance * Sun: 58° distance * rough path description: SE USA, Carribean Additional comments ------------------- very short druation The occultation path -------------------- * approximate projected width [km]: 2 * 1 sigma uncertainty interval [path widths]: +/- 1.36 * 1 sigma uncertainty interval [seconds]: +/- 0.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.002, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.002", 0.002", 90°) * approx speed of asteroid's shadow [km/s]: 33.6343 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6850-01892-1 by 101955 Bennu on 2023 Feb 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 - 98 0 0 34 57 21 10 13 45.4 0 124 -38 34 56 40 34 58 2 34 54 56 34 59 46 .... - 97 0 0 34 23 50 10 13 45.5 1 125 -37 34 23 9 34 24 31 34 21 25 34 26 15 -0.28 - 96 0 0 33 50 19 10 13 45.6 2 125 -36 33 49 38 33 51 0 33 47 54 33 52 43 -0.48 - 95 0 0 33 16 48 10 13 45.8 3 126 -36 33 16 7 33 17 29 33 14 23 33 19 12 -0.56 - 94 0 0 32 43 19 10 13 46.0 4 126 -35 32 42 38 32 43 59 32 40 55 32 45 43 -0.60 - 93 0 0 32 9 52 10 13 46.4 5 127 -34 32 9 12 32 10 33 32 7 29 32 12 16 -0.62 - 92 0 0 31 36 30 10 13 46.8 6 128 -33 31 35 50 31 37 11 31 34 7 31 38 54 -0.64 - 91 0 0 31 3 14 10 13 47.3 7 128 -33 31 2 33 31 3 54 31 0 51 31 5 37 -0.65 - 90 0 0 30 30 3 10 13 47.9 8 129 -32 30 29 23 30 30 43 30 27 40 30 32 26 -0.66 - 89 0 0 29 57 0 10 13 48.5 9 129 -31 29 56 20 29 57 40 29 54 38 29 59 22 -0.67 - 88 0 0 29 24 6 10 13 49.2 10 130 -30 29 23 26 29 24 46 29 21 44 29 26 28 -0.68 - 87 0 0 28 51 22 10 13 50.0 11 130 -29 28 50 42 28 52 2 28 49 0 28 53 43 -0.68 - 86 0 0 28 18 48 10 13 50.9 12 131 -28 28 18 8 28 19 28 28 16 27 28 21 9 -0.69 - 85 0 0 27 46 27 10 13 51.9 13 131 -28 27 45 47 27 47 7 27 44 6 27 48 48 -0.69 - 84 0 0 27 14 19 10 13 52.9 14 132 -27 27 13 39 27 14 58 27 11 59 27 16 39 -0.70 - 83 0 0 26 42 25 10 13 54.0 16 132 -26 26 41 45 26 43 4 26 40 5 26 44 45 -0.70 - 82 0 0 26 10 46 10 13 55.2 17 133 -25 26 10 7 26 11 25 26 8 27 26 13 5 -0.70 - 81 0 0 25 39 23 10 13 56.4 18 133 -24 25 38 44 25 40 3 25 37 5 25 41 42 -0.70 - 80 0 0 25 8 18 10 13 57.8 19 134 -23 25 7 39 25 8 57 25 6 0 25 10 37 -0.71 - 79 0 0 24 37 31 10 13 59.2 20 134 -22 24 36 52 24 38 10 24 35 13 24 39 49 -0.71 - 78 0 0 24 7 3 10 14 0.6 21 135 -21 24 6 24 24 7 42 24 4 46 24 9 21 -0.71 - 77 0 0 23 36 55 10 14 2.2 22 135 -20 23 36 17 23 37 34 23 34 38 23 39 12 -0.71 - 76 0 0 23 7 8 10 14 3.8 23 136 -19 23 6 30 23 7 47 23 4 52 23 9 25 -0.71 - 75 0 0 22 37 43 10 14 5.5 24 136 -18 22 37 5 22 38 22 22 35 27 22 39 59 -0.71 - 74 0 0 22 8 41 10 14 7.3 25 137 -17 22 8 3 22 9 19 22 6 26 22 10 57 -0.71 - 73 0 0 21 40 2 10 14 9.1 26 137 -16 21 39 24 21 40 40 21 37 47 21 42 17 -0.72 - 72 0 0 21 11 47 10 14 11.0 27 138 -15 21 11 9 21 12 26 21 9 33 21 14 2 -0.72 - 71 0 0 20 43 58 10 14 13.0 28 139 -14 20 43 20 20 44 36 20 41 44 20 46 12 -0.72 - 70 0 0 20 16 34 10 14 15.0 28 139 -13 20 15 56 20 17 12 20 14 20 20 18 47 -0.72 - 69 0 0 19 49 36 10 14 17.1 29 140 -12 19 48 58 19 50 14 19 47 23 19 51 49 -0.72 - 68 0 0 19 23 6 10 14 19.2 30 140 -11 19 22 28 19 23 43 19 20 53 19 25 18 -0.72 - 67 0 0 18 57 3 10 14 21.4 31 141 -10 18 56 25 18 57 40 18 54 50 18 59 15 -0.72 - 66 0 0 18 31 28 10 14 23.7 32 142 -9 18 30 51 18 32 5 18 29 16 18 33 40 -0.72 - 65 0 0 18 6 22 10 14 26.0 33 142 -8 18 5 45 18 7 0 18 4 11 18 8 34 -0.72 - 64 0 0 17 41 46 10 14 28.4 34 143 -7 17 41 9 17 42 23 17 39 35 17 43 57 -0.72 - 63 0 0 17 17 40 10 14 30.8 35 143 -6 17 17 3 17 18 17 17 15 29 17 19 50 -0.73 - 62 0 0 16 54 4 10 14 33.3 36 144 -5 16 53 27 16 54 41 16 51 54 16 56 14 -0.73 - 61 0 0 16 30 59 10 14 35.9 37 145 -4 16 30 22 16 31 36 16 28 50 16 33 9 -0.73 - 60 0 0 16 8 26 10 14 38.4 38 146 -3 16 7 49 16 9 2 16 6 16 16 10 35 -0.73 - 59 0 0 15 46 24 10 14 41.1 38 146 -2 15 45 47 15 47 0 15 44 15 15 48 33 -0.73 - 58 0 0 15 24 54 10 14 43.8 39 147 -1 15 24 18 15 25 31 15 22 46 15 27 3 -0.73 - 57 0 0 15 3 57 10 14 46.5 40 148 0 15 3 21 15 4 34 15 1 49 15 6 6 -0.73 - 56 0 0 14 43 33 10 14 49.2 41 149 1 14 42 57 14 44 10 14 41 26 14 45 41 -0.73 - 55 0 0 14 23 43 10 14 52.0 42 150 2 14 23 7 14 24 19 14 21 35 14 25 50 -0.73 - 54 0 0 14 4 25 10 14 54.9 42 150 3 14 3 50 14 5 1 14 2 19 14 6 32 -0.73 - 53 0 0 13 45 42 10 14 57.8 43 151 4 13 45 6 13 46 18 13 43 36 13 47 49 -0.73 - 52 0 0 13 27 33 10 15 0.7 44 152 5 13 26 57 13 28 9 13 25 27 13 29 39 -0.73 - 51 0 0 13 9 58 10 15 3.7 45 153 6 13 9 23 13 10 34 13 7 52 13 12 4 -0.73 - 50 0 0 12 52 58 10 15 6.6 45 154 7 12 52 23 12 53 34 12 50 53 12 55 4 -0.73 - 49 0 0 12 36 33 10 15 9.7 46 155 8 12 35 57 12 37 8 12 34 28 12 38 38 -0.73 - 48 0 0 12 20 43 10 15 12.7 47 156 9 12 20 7 12 21 18 12 18 38 12 22 48 -0.73 - 47 0 0 12 5 28 10 15 15.8 47 157 10 12 4 53 12 6 3 12 3 23 12 7 32 -0.74 - 46 0 0 11 50 48 10 15 18.9 48 158 11 11 50 13 11 51 24 11 48 44 11 52 53 -0.74 - 45 0 0 11 36 45 10 15 22.0 48 160 12 11 36 10 11 37 20 11 34 41 11 38 49 -0.74 - 44 0 0 11 23 17 10 15 25.2 49 161 13 11 22 42 11 23 52 11 21 13 11 25 20 -0.74 - 43 0 0 11 10 24 10 15 28.3 49 162 14 11 9 49 11 10 59 11 8 21 11 12 28 -0.74 - 42 0 0 10 58 8 10 15 31.5 50 163 15 10 57 33 10 58 43 10 56 5 11 0 12 -0.74 - 41 0 0 10 46 28 10 15 34.7 50 165 16 10 45 54 10 47 3 10 44 25 10 48 31 -0.74 - 40 0 0 10 35 25 10 15 38.0 51 166 17 10 34 50 10 35 59 10 33 22 10 37 27 -0.74 - 39 0 0 10 24 57 10 15 41.2 51 167 18 10 24 23 10 25 32 10 22 55 10 27 0 -0.74 - 38 0 0 10 15 7 10 15 44.5 52 169 19 10 14 32 10 15 41 10 13 4 10 17 9 -0.74 - 37 0 0 10 5 52 10 15 47.7 52 170 20 10 5 18 10 6 27 10 3 50 10 7 54 -0.74 - 36 0 0 9 57 14 10 15 51.0 52 171 21 9 56 40 9 57 49 9 55 13 9 59 17 -0.74 - 35 0 0 9 49 13 10 15 54.3 53 173 22 9 48 39 9 49 48 9 47 12 9 51 15 -0.74 - 34 0 0 9 41 49 10 15 57.6 53 174 23 9 41 15 9 42 24 9 39 47 9 43 51 -0.74 - 33 0 0 9 35 2 10 16 0.9 53 176 24 9 34 27 9 35 36 9 33 0 9 37 3 -0.74 - 32 0 0 9 28 51 10 16 4.2 53 177 25 9 28 17 9 29 25 9 26 50 9 30 52 -0.74 - 31 0 0 9 23 17 10 16 7.5 53 179 26 9 22 43 9 23 52 9 21 16 9 25 19 -0.74 - 30 0 0 9 18 20 10 16 10.8 53 180 27 9 17 46 9 18 55 9 16 19 9 20 22 -0.74 - 29 0 0 9 14 0 10 16 14.2 53 182 28 9 13 26 9 14 35 9 11 59 9 16 1 -0.74 - 28 0 0 9 10 17 10 16 17.5 53 183 29 9 9 43 9 10 52 9 8 16 9 12 18 -0.74 - 27 0 0 9 7 11 10 16 20.8 53 185 30 9 6 37 9 7 46 9 5 10 9 9 12 -0.74 - 26 0 0 9 4 42 10 16 24.1 53 186 31 9 4 8 9 5 17 9 2 42 9 6 43 -0.74 - 25 0 0 9 2 50 10 16 27.4 53 188 32 9 2 16 9 3 25 9 0 50 9 4 51 -0.74 - 24 0 0 9 1 36 10 16 30.7 53 189 33 9 1 1 9 2 10 8 59 35 9 3 36 -0.74 - 23 0 0 9 0 58 10 16 34.0 53 191 34 9 0 23 9 1 32 8 58 57 9 2 59 -0.74 - 22 0 0 9 0 57 10 16 37.3 53 192 35 9 0 23 9 1 31 8 58 56 9 2 58 -0.74 - 21 0 0 9 1 33 10 16 40.6 53 194 36 9 0 59 9 2 7 8 59 32 9 3 34 -0.74 - 20 0 0 9 2 46 10 16 43.9 52 195 37 9 2 12 9 3 20 9 0 45 9 4 47 -0.74 - 19 0 0 9 4 36 10 16 47.1 52 196 38 9 4 2 9 5 11 9 2 35 9 6 37 -0.74 - 18 0 0 9 7 4 10 16 50.4 52 198 38 9 6 29 9 7 38 9 5 3 9 9 4 -0.74 - 17 0 0 9 10 8 10 16 53.6 51 199 39 9 9 33 9 10 42 9 8 7 9 12 9 -0.74 - 16 0 0 9 13 49 10 16 56.8 51 200 40 9 13 14 9 14 23 9 11 48 9 15 50 -0.74 - 15 0 0 9 18 7 10 17 0.0 50 202 41 9 17 32 9 18 41 9 16 6 9 20 8 -0.74 - 14 0 0 9 23 2 10 17 3.2 50 203 42 9 22 27 9 23 36 9 21 0 9 25 3 -0.74 - 13 0 0 9 28 33 10 17 6.3 50 204 43 9 27 59 9 29 8 9 26 32 9 30 35 -0.74 - 12 0 0 9 34 42 10 17 9.5 49 205 44 9 34 8 9 35 16 9 32 41 9 36 44 -0.74 - 11 0 0 9 41 27 10 17 12.6 49 206 45 9 40 53 9 42 2 9 39 26 9 43 29 -0.74 - 10 0 0 9 48 49 10 17 15.7 48 208 45 9 48 15 9 49 24 9 46 48 9 50 51 -0.74 - 9 0 0 9 56 48 10 17 18.8 47 209 46 9 56 13 9 57 23 9 54 46 9 58 50 -0.74 - 8 0 0 10 5 23 10 17 21.8 47 210 47 10 4 49 10 5 58 10 3 21 10 7 25 -0.74 - 7 0 0 10 14 35 10 17 24.8 46 211 48 10 14 0 10 15 10 10 12 33 10 16 37 -0.74 - 6 0 0 10 24 23 10 17 27.8 45 212 49 10 23 48 10 24 58 10 22 21 10 26 26 -0.74 - 5 0 0 10 34 48 10 17 30.7 45 213 49 10 34 13 10 35 22 10 32 45 10 36 50 -0.74 - 4 0 0 10 45 48 10 17 33.6 44 213 50 10 45 13 10 46 23 10 43 45 10 47 51 -0.74 - 3 0 0 10 57 25 10 17 36.5 43 214 51 10 56 50 10 58 0 10 55 22 10 59 28 -0.74 - 2 0 0 11 9 38 10 17 39.4 43 215 51 11 9 3 11 10 13 11 7 35 11 11 41 -0.74 - 1 0 0 11 22 27 10 17 42.2 42 216 52 11 21 52 11 23 2 11 20 23 11 24 30 -0.74 0 0 0 11 35 51 10 17 45.0 41 217 53 11 35 16 11 36 26 11 33 47 11 37 55 -0.74 1 0 0 11 49 51 10 17 47.7 40 218 53 11 49 16 11 50 27 11 47 47 11 51 56 -0.74 2 0 0 12 4 27 10 17 50.4 40 218 54 12 3 52 12 5 2 12 2 22 12 6 31 -0.74 3 0 0 12 19 38 10 17 53.0 39 219 55 12 19 2 12 20 13 12 17 33 12 21 43 -0.74 4 0 0 12 35 24 10 17 55.7 38 220 55 12 34 48 12 35 59 12 33 19 12 37 29 -0.74 5 0 0 12 51 45 10 17 58.2 37 220 56 12 51 9 12 52 20 12 49 39 12 53 50 -0.74 6 0 0 13 8 40 10 18 0.7 36 221 56 13 8 4 13 9 16 13 6 34 13 10 46 -0.74 7 0 0 13 26 10 10 18 3.2 35 222 57 13 25 34 13 26 46 13 24 4 13 28 16 -0.74 8 0 0 13 44 14 10 18 5.6 34 222 57 13 43 39 13 44 50 13 42 8 13 46 21 -0.74 9 0 0 14 2 52 10 18 8.0 34 223 57 14 2 17 14 3 28 14 0 46 14 4 59 -0.74 10 0 0 14 22 4 10 18 10.3 33 223 58 14 21 28 14 22 40 14 19 57 14 24 11 -0.74 11 0 0 14 41 50 10 18 12.6 32 224 58 14 41 13 14 42 26 14 39 42 14 43 57 -0.74 12 0 0 15 2 8 10 18 14.8 31 224 58 15 1 32 15 2 44 15 0 0 15 4 16 -0.74 13 0 0 15 22 59 10 18 16.9 30 225 58 15 22 23 15 23 35 15 20 51 15 25 7 -0.74 14 0 0 15 44 22 10 18 19.0 29 226 59 15 43 46 15 44 59 15 42 14 15 46 31 -0.74 15 0 0 16 6 18 10 18 21.1 28 226 59 16 5 41 16 6 54 16 4 9 16 8 27 -0.74 16 0 0 16 28 45 10 18 23.0 27 227 59 16 28 8 16 29 21 16 26 35 16 30 54 -0.74 17 0 0 16 51 43 10 18 24.9 26 227 59 16 51 6 16 52 20 16 49 33 16 53 53 -0.74 18 0 0 17 15 12 10 18 26.8 25 227 59 17 14 35 17 15 49 17 13 2 17 17 22 -0.74 19 0 0 17 39 11 10 18 28.6 24 228 59 17 38 34 17 39 48 17 37 0 17 41 22 -0.74 20 0 0 18 3 40 10 18 30.3 23 228 59 18 3 3 18 4 17 18 1 29 18 5 51 -0.74 21 0 0 18 28 38 10 18 31.9 22 229 59 18 28 1 18 29 16 18 26 27 18 30 50 -0.74 22 0 0 18 54 5 10 18 33.5 21 229 58 18 53 28 18 54 43 18 51 53 18 56 17 -0.74 23 0 0 19 20 0 10 18 35.0 20 230 58 19 19 23 19 20 38 19 17 48 19 22 13 -0.75 24 0 0 19 46 23 10 18 36.5 19 230 58 19 45 45 19 47 1 19 44 10 19 48 36 -0.75 25 0 0 20 13 12 10 18 37.9 18 231 58 20 12 35 20 13 50 20 10 59 20 15 26 -0.75 26 0 0 20 40 28 10 18 39.2 17 231 57 20 39 50 20 41 6 20 38 14 20 42 42 -0.75 27 0 0 21 8 9 10 18 40.4 16 231 57 21 7 31 21 8 48 21 5 55 21 10 24 -0.75 28 0 0 21 36 16 10 18 41.5 15 232 56 21 35 37 21 36 54 21 34 1 21 38 31 -0.75 29 0 0 22 4 46 10 18 42.6 14 232 56 22 4 8 22 5 24 22 2 31 22 7 1 -0.75 30 0 0 22 33 40 10 18 43.6 13 233 56 22 33 1 22 34 18 22 31 24 22 35 56 -0.75 31 0 0 23 2 56 10 18 44.6 12 233 55 23 2 17 23 3 35 23 0 40 23 5 12 -0.75 32 0 0 23 32 34 10 18 45.4 11 234 54 23 31 55 23 33 13 23 30 17 23 34 51 -0.75 33 0 0 24 2 33 10 18 46.2 10 234 54 24 1 54 24 3 12 24 0 16 24 4 50 -0.75 34 0 0 24 32 52 10 18 46.9 9 234 53 24 32 13 24 33 31 24 30 34 24 35 10 -0.75 35 0 0 25 3 30 10 18 47.5 8 235 53 25 2 51 25 4 9 25 1 12 25 5 48 -0.76 36 0 0 25 34 26 10 18 48.1 7 235 52 25 33 47 25 35 6 25 32 8 25 36 45 -0.76 37 0 0 26 5 40 10 18 48.5 6 236 51 26 5 1 26 6 19 26 3 21 26 7 59 -0.76 38 0 0 26 37 10 10 18 48.9 5 236 50 26 36 30 26 37 49 26 34 50 26 39 29 -0.77 39 0 0 27 8 55 10 18 49.2 4 237 50 27 8 15 27 9 35 27 6 35 27 11 15 -0.78 40 0 0 27 40 54 10 18 49.4 3 237 49 27 40 15 27 41 34 27 38 34 27 43 15 -0.80 41 0 0 28 13 7 10 18 49.6 2 238 48 28 12 27 28 13 47 28 10 46 28 15 28 -0.84 42 0 0 28 45 32 10 18 49.7 1 238 47 28 44 52 28 46 12 28 43 10 28 47 53 -1.00 Uncertainty in time = +/- 0 secs Prediction of 2022 Aug 16.6 Data for the target star ------------------------ * name: TYC 6850-01892-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 02 49.1388 DE: -27 22 20.741 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 02 49.1389 DE: -27 22 20.741 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 9.0 * B mag [mag]: 10.9 * Diameter [mas]: 1.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (101955) Bennu asteroid class: approx. diameter [km]: 0 approx. diameter ["]: 0.000 distance from Earth [AU]: 1.58030 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: ORX_merged_DE424 date of fit: 2021 Jan 07 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): 0.002", 0.002", 90° remarks: * orbital elements for (101955)Bennu : Mean anomaly = 156.3309147689 deg Arg. of pericenter = 66.3363381013 deg Long. of node = 1.9973875667 deg Inclination = 6.0339000240 deg Eccentricity = 0.2037161973 Semimajor axis = 1.1259987684 AU Perihelion dist = 0.8966145812 AU Mag: H = 20.21, G = -0.03 Epoch of elements : MJD 59992.42797454 TDT (2023 Feb 17.4280) ------ occelmnt file for Occult BEGIN ----------------------------------- ORX_merged_DE4242021Jan07,0.05,2023,2,17,10.271549,0.037504,0.594188,18.947118,-1.185147,-0.003138,-0.000158,-0.000001,0.000000 -30.1481,-27.3722,29.42,-12.00,False TYC 6850-01892-1,18.04698293,-27.3724281,10.86,8.96,7.93,1.2,0,,18.07076163,-27.3722051,0.05,0.05,0,0,0 101955,Bennu,23.78,1.7,1.5803,0,0,7.917,-6.58,,0.0 0,155.9779,2023,2,17,66.3363,1.9974,6.0339,0.20372,1.12600,0.89661,20.21,5.0,-0.03 2.265,0.0020,0.0020,90,0.0020,Known errors,-1.00,-1,-1,-1 20230217_1892-1,59807.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Aug 16, 15:22 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org