IOTA/IOTA-ES occultation update for (4521) Akimov / TYC 7952-01945-1 event on 2024 Aug 09, 15:12 UT Visible from Summary ------- On 2024 Aug 09 UT, the 20.1807905734831 km diameter asteroid (4521) Akimov will occult a 8.5 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 8.12 mag to 16.65 mag (the magnitude of the asteroid) for at most 2.120 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 Aug 09, 15:04 - 2024 Aug 09, 15:20 * geocentric midpoint of event [JD]: 2460532.13398534 * magnitude of target star: 8.53 * magnitude drop [mag]: 8.12 * estimated maximum duration [s]: 2.120 * Moon: 23 % sunlit, 102° distance * Sun: 151° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 29 * 1 sigma uncertainty interval [path widths]: +/- 0.40 * 1 sigma uncertainty interval [seconds]: +/- 4.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.031, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.032", 0.005", 81°) * approx speed of asteroid's shadow [km/s]: 9.8385 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7952-01945-1 by 4521 Akimov on 2024 Aug 9 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 56 0 0 29 55 2 15 20 43.3 0 139 -5 .. .. .. 29 42 48 .. .. .. 29 32 57 .... 57 0 0 28 55 16 15 20 43.0 1 140 -6 29 7 22 28 43 14 29 17 12 28 33 33 -0.33 58 0 0 27 56 41 15 20 42.3 3 140 -7 28 8 35 27 44 51 28 18 16 27 35 19 -0.66 59 0 0 26 59 19 15 20 41.2 4 140 -8 27 11 1 26 47 39 27 20 32 26 38 16 -0.77 60 0 0 26 3 8 15 20 39.6 5 141 -9 26 14 40 25 51 40 26 24 2 25 42 25 -0.83 61 0 0 25 8 11 15 20 37.5 7 141 -10 25 19 32 24 56 53 25 28 46 24 47 47 -0.86 62 0 0 24 14 28 15 20 35.1 8 142 -12 24 25 39 24 3 20 24 34 44 23 54 22 -0.89 63 0 0 23 21 57 15 20 32.2 9 142 -13 23 32 59 23 10 59 23 41 56 23 2 9 -0.90 64 0 0 22 30 40 15 20 29.0 10 143 -14 22 41 32 22 19 51 22 50 22 22 11 8 -0.92 65 0 0 21 40 37 15 20 25.3 12 143 -15 21 51 20 21 29 57 22 0 2 21 21 21 -0.93 66 0 0 20 51 47 15 20 21.3 13 143 -16 21 2 21 20 41 15 21 10 56 20 32 46 -0.93 67 0 0 20 4 9 15 20 17.0 14 144 -18 20 14 35 19 53 46 20 23 4 19 45 23 -0.94 68 0 0 19 17 45 15 20 12.3 15 144 -19 19 28 3 19 7 29 19 36 24 18 59 13 -0.94 69 0 0 18 32 32 15 20 7.3 16 145 -20 18 42 43 18 22 24 18 50 58 18 14 14 -0.95 70 0 0 17 48 32 15 20 1.9 17 145 -21 17 58 35 17 38 31 18 6 44 17 30 27 -0.95 71 0 0 17 5 42 15 19 56.3 18 145 -22 17 15 38 16 55 48 17 23 42 16 47 50 -0.95 72 0 0 16 24 3 15 19 50.4 20 146 -23 16 33 52 16 14 16 16 41 50 16 6 23 -0.96 73 0 0 15 43 35 15 19 44.2 21 146 -24 15 53 17 15 33 54 16 1 10 15 26 6 -0.96 74 0 0 15 4 15 15 19 37.8 22 147 -26 15 13 52 14 54 41 15 21 39 14 46 58 -0.96 75 0 0 14 26 5 15 19 31.0 23 147 -27 14 35 36 14 16 37 14 43 18 14 8 58 -0.96 76 0 0 13 49 3 15 19 24.1 24 148 -28 13 58 28 13 39 40 14 6 6 13 32 6 -0.96 77 0 0 13 13 9 15 19 16.9 25 148 -29 13 22 28 13 3 52 13 30 2 12 56 22 -0.96 78 0 0 12 38 22 15 19 9.5 26 149 -30 12 47 35 12 29 10 12 55 5 12 21 44 -0.96 79 0 0 12 4 41 15 19 1.9 27 149 -31 12 13 50 11 55 34 12 21 15 11 48 12 -0.96 80 0 0 11 32 6 15 18 54.1 28 149 -32 11 41 10 11 23 3 11 48 31 11 15 46 -0.96 81 0 0 11 0 36 15 18 46.1 29 150 -33 11 9 35 10 51 38 11 16 52 10 44 24 -0.96 82 0 0 10 30 10 15 18 37.9 30 150 -34 10 39 5 10 21 16 10 46 18 10 14 6 -0.96 83 0 0 10 0 48 15 18 29.6 30 151 -35 10 9 38 9 51 58 10 16 49 9 44 51 -0.96 84 0 0 9 32 29 15 18 21.1 31 151 -36 9 41 15 9 23 43 9 48 22 9 16 40 -0.96 85 0 0 9 5 12 15 18 12.4 32 152 -38 9 13 55 8 56 31 9 20 58 8 49 30 -0.96 86 0 0 8 38 57 15 18 3.6 33 153 -39 8 47 36 8 30 20 8 54 37 8 23 22 -0.96 87 0 0 8 13 44 15 17 54.6 34 153 -40 8 22 19 8 5 10 8 29 17 7 58 15 -0.96 88 0 0 7 49 31 15 17 45.5 35 154 -41 7 58 3 7 41 0 8 4 58 7 34 8 -0.96 89 0 0 7 26 18 15 17 36.3 35 154 -42 7 34 47 7 17 51 7 41 40 7 11 1 -0.96 90 0 0 7 4 5 15 17 27.0 36 155 -43 7 12 31 6 55 40 7 19 21 6 48 53 -0.96 91 0 0 6 42 51 15 17 17.5 37 156 -44 6 51 14 6 34 29 6 58 2 6 27 44 -0.96 92 0 0 6 22 36 15 17 7.9 37 156 -45 6 30 56 6 14 17 6 37 41 6 7 34 -0.96 93 0 0 6 3 18 15 16 58.3 38 157 -46 6 11 36 5 55 2 6 18 19 5 48 21 -0.96 94 0 0 5 44 58 15 16 48.5 39 158 -47 5 53 13 5 36 44 5 59 55 5 30 5 -0.96 95 0 0 5 27 35 15 16 38.7 39 158 -48 5 35 48 5 19 23 5 42 27 5 12 46 -0.96 96 0 0 5 11 8 15 16 28.7 40 159 -49 5 19 19 5 2 59 5 25 57 4 56 24 -0.96 97 0 0 4 55 38 15 16 18.7 41 160 -50 5 3 47 4 47 31 5 10 23 4 40 57 -0.96 98 0 0 4 41 4 15 16 8.6 41 161 -50 4 49 11 4 32 58 4 55 45 4 26 26 -0.96 99 0 0 4 27 25 15 15 58.4 42 161 -51 4 35 30 4 19 21 4 42 3 4 12 51 -0.96 100 0 0 4 14 41 15 15 48.2 42 162 -52 4 22 44 4 6 39 4 29 16 4 0 10 -0.96 101 0 0 4 2 52 15 15 37.9 43 163 -53 4 10 54 3 54 52 4 17 24 3 48 24 -0.96 102 0 0 3 51 57 15 15 27.5 43 164 -54 3 59 58 3 43 58 4 6 27 3 37 31 -0.96 103 0 0 3 41 57 15 15 17.1 43 165 -55 3 49 56 3 33 59 3 56 24 3 27 33 -0.96 104 0 0 3 32 50 15 15 6.7 44 166 -56 3 40 48 3 24 54 3 47 16 3 18 29 -0.96 105 0 0 3 24 37 15 14 56.1 44 167 -57 3 32 34 3 16 42 3 39 1 3 10 18 -0.96 106 0 0 3 17 18 15 14 45.6 45 168 -58 3 25 14 3 9 23 3 31 39 3 3 0 -0.96 107 0 0 3 10 51 15 14 35.0 45 169 -58 3 18 46 3 2 58 3 25 11 2 56 35 -0.96 108 0 0 3 5 18 15 14 24.4 45 170 -59 3 13 12 2 57 25 3 19 37 2 51 3 -0.96 109 0 0 3 0 38 15 14 13.7 45 171 -60 3 8 31 2 52 45 3 14 55 2 46 23 -0.96 110 0 0 2 56 50 15 14 3.0 46 172 -61 3 4 43 2 48 58 3 11 7 2 42 37 -0.96 111 0 0 2 53 55 15 13 52.3 46 173 -62 3 1 48 2 46 3 3 8 11 2 39 42 -0.96 112 0 0 2 51 52 15 13 41.6 46 174 -62 2 59 45 2 44 1 3 6 8 2 37 40 -0.96 113 0 0 2 50 42 15 13 30.8 46 175 -63 2 58 35 2 42 51 3 4 57 2 36 30 -0.96 114 0 0 2 50 25 15 13 20.0 46 176 -64 2 58 17 2 42 33 3 4 40 2 36 13 -0.96 115 0 0 2 50 59 15 13 9.3 46 177 -64 2 58 52 2 43 8 3 5 15 2 36 47 -0.96 116 0 0 2 52 27 15 12 58.5 46 178 -65 3 0 19 2 44 35 3 6 42 2 38 14 -0.96 117 0 0 2 54 46 15 12 47.7 46 179 -66 3 2 39 2 46 55 3 9 2 2 40 34 -0.96 118 0 0 2 57 59 15 12 36.9 46 180 -66 3 5 52 2 50 7 3 12 16 2 43 45 -0.96 119 0 0 3 2 4 15 12 26.1 46 181 -67 3 9 57 2 54 11 3 16 21 2 47 49 -0.96 120 0 0 3 7 1 15 12 15.3 46 182 -67 3 14 56 2 59 8 3 21 20 2 52 46 -0.96 121 0 0 3 12 52 15 12 4.5 46 183 -68 3 20 47 3 4 58 3 27 12 2 58 35 -0.96 122 0 0 3 19 35 15 11 53.7 46 184 -68 3 27 31 3 11 40 3 33 57 3 5 17 -0.96 123 0 0 3 27 12 15 11 42.9 45 185 -68 3 35 8 3 19 16 3 41 35 3 12 52 -0.96 124 0 0 3 35 41 15 11 32.2 45 186 -69 3 43 39 3 27 44 3 50 7 3 21 19 -0.96 125 0 0 3 45 5 15 11 21.5 45 187 -69 3 53 4 3 37 7 3 59 32 3 30 41 -0.96 126 0 0 3 55 22 15 11 10.8 45 188 -69 4 3 22 3 47 22 4 9 52 3 40 55 -0.96 127 0 0 4 6 33 15 11 0.1 44 189 -69 4 14 35 3 58 32 4 21 6 3 52 4 -0.97 128 0 0 4 18 39 15 10 49.5 44 190 -69 4 26 42 4 10 36 4 33 14 4 4 7 -0.97 129 0 0 4 31 38 15 10 38.9 44 191 -69 4 39 43 4 23 34 4 46 17 4 17 4 -0.97 130 0 0 4 45 33 15 10 28.3 43 192 -69 4 53 40 4 37 27 5 0 15 4 30 55 -0.97 131 0 0 5 0 23 15 10 17.8 43 193 -69 5 8 32 4 52 16 5 15 8 4 45 42 -0.97 132 0 0 5 16 9 15 10 7.3 42 193 -69 5 24 20 5 7 59 5 30 58 5 1 24 -0.97 133 0 0 5 32 51 15 9 56.9 42 194 -69 5 41 4 5 24 39 5 47 43 5 18 2 -0.97 134 0 0 5 50 29 15 9 46.6 41 195 -69 5 58 44 5 42 15 6 5 26 5 35 36 -0.97 135 0 0 6 9 4 15 9 36.3 41 196 -68 6 17 22 6 0 47 6 24 5 5 54 6 -0.97 136 0 0 6 28 36 15 9 26.1 40 197 -68 6 36 56 6 20 17 6 43 42 6 13 34 -0.97 137 0 0 6 49 6 15 9 15.9 40 198 -67 6 57 29 6 40 44 7 4 17 6 33 59 -0.97 138 0 0 7 10 34 15 9 5.9 39 198 -67 7 19 0 7 2 9 7 25 50 6 55 22 -0.98 139 0 0 7 33 1 15 8 55.9 38 199 -66 7 41 30 7 24 33 7 48 22 7 17 43 -0.98 140 0 0 7 56 27 15 8 46.0 38 200 -66 8 4 59 7 47 56 8 11 54 7 41 3 -0.98 141 0 0 8 20 52 15 8 36.2 37 201 -65 8 29 28 8 12 18 8 36 26 8 5 23 -0.98 142 0 0 8 46 18 15 8 26.5 36 201 -65 8 54 57 8 37 40 9 1 58 8 30 43 -0.98 143 0 0 9 12 45 15 8 17.0 35 202 -64 9 21 28 9 4 4 9 28 32 8 57 3 -0.98 144 0 0 9 40 13 15 8 7.5 35 203 -63 9 49 0 9 31 28 9 56 7 9 24 24 -0.98 145 0 0 10 8 44 15 7 58.2 34 203 -62 10 17 34 9 59 54 10 24 45 9 52 47 -0.98 146 0 0 10 38 16 15 7 49.1 33 204 -61 10 47 11 10 29 23 10 54 25 10 22 13 -0.99 147 0 0 11 8 53 15 7 40.0 32 204 -61 11 17 52 10 59 55 11 25 9 10 52 41 -0.99 148 0 0 11 40 32 15 7 31.1 31 205 -60 11 49 36 11 31 30 11 56 58 11 24 12 -0.99 149 0 0 12 13 17 15 7 22.4 30 206 -59 12 22 26 12 4 10 12 29 51 11 56 48 -0.99 150 0 0 12 47 6 15 7 13.9 29 206 -58 12 56 20 12 37 54 13 3 49 12 30 28 -0.99 151 0 0 13 22 1 15 7 5.5 28 207 -57 13 31 20 13 12 44 13 38 54 13 5 14 -0.99 152 0 0 13 58 3 15 6 57.3 28 207 -56 14 7 27 13 48 40 14 15 5 13 41 6 -1.00 153 0 0 14 35 11 15 6 49.3 27 208 -55 14 44 41 14 25 42 14 52 24 14 18 4 -1.00 154 0 0 15 13 27 15 6 41.6 26 208 -54 15 23 3 15 3 52 15 30 51 14 56 9 -1.00 155 0 0 15 52 51 15 6 34.0 25 209 -53 16 2 33 15 43 10 16 10 26 15 35 22 -1.00 156 0 0 16 33 23 15 6 26.7 23 209 -52 16 43 12 16 23 36 16 51 10 16 15 43 -1.00 157 0 0 17 15 5 15 6 19.7 22 210 -51 17 25 1 17 5 12 17 33 4 16 57 13 -1.00 158 0 0 17 57 57 15 6 12.9 21 210 -49 18 8 0 17 47 56 18 16 9 17 39 52 -1.01 159 0 0 18 41 59 15 6 6.3 20 211 -48 18 52 9 18 31 51 19 0 24 18 23 41 -1.01 160 0 0 19 27 12 15 6 0.1 19 211 -47 19 37 29 19 16 56 19 45 51 19 8 40 -1.01 161 0 0 20 13 35 15 5 54.1 18 212 -46 20 24 1 20 3 12 20 32 29 19 54 50 -1.01 162 0 0 21 1 11 15 5 48.5 17 212 -45 21 11 45 20 50 40 21 20 19 20 42 11 -1.02 163 0 0 21 49 58 15 5 43.1 16 212 -44 22 0 41 21 39 18 22 9 22 21 30 43 -1.02 164 0 0 22 39 57 15 5 38.2 14 213 -42 22 50 49 22 29 9 22 59 38 22 20 26 -1.02 165 0 0 23 31 9 15 5 33.5 13 213 -41 23 42 10 23 20 11 23 51 6 23 11 21 -1.03 166 0 0 24 23 33 15 5 29.3 12 214 -40 24 34 43 24 12 26 24 43 48 24 3 28 -1.03 167 0 0 25 17 9 15 5 25.4 11 214 -39 25 28 29 25 5 52 25 37 42 24 56 46 -1.03 168 0 0 26 11 57 15 5 21.9 10 215 -37 26 23 28 26 0 29 26 32 49 25 51 15 -1.04 169 0 0 27 7 57 15 5 18.8 8 215 -36 27 19 38 26 56 18 27 29 9 26 46 56 -1.05 170 0 0 28 5 8 15 5 16.1 7 216 -35 28 17 1 27 53 18 28 26 40 27 43 47 -1.06 171 0 0 29 3 30 15 5 13.9 6 216 -34 29 15 34 28 51 29 29 25 23 28 41 48 -1.07 172 0 0 30 3 2 15 5 12.1 4 217 -32 30 15 18 29 50 49 30 25 18 29 40 58 -1.09 173 0 0 31 3 42 15 5 10.8 3 217 -31 31 16 12 30 51 17 31 26 21 30 41 17 -1.13 174 0 0 32 5 31 15 5 10.0 2 218 -30 32 18 14 31 52 53 32 28 34 31 42 42 -1.22 175 0 0 33 8 26 15 5 9.6 0 218 -28 33 21 22 32 55 34 33 31 54 32 45 13 -1.91 Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 7952-01945-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 17 59.8499 DE: -41 00 36.808 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 17 59.8499 DE: -41 00 36.808 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 8.5 * B mag [mag]: 9.8 * Diameter [mas]: 0.50 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4521) Akimov asteroid class: approx. diameter [km]: 20 approx. diameter ["]: 0.014 distance from Earth [AU]: 1.98880 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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): 0.032", 0.005", 80.827° remarks: * orbital elements for (4521)Akimov : Mean anomaly = 38.3213826530 deg Arg. of pericenter = 211.6912023029 deg Long. of node = 48.0432876429 deg Inclination = 14.3775117377 deg Eccentricity = 0.0851742143 Semimajor axis = 3.1186949581 AU Perihelion dist = 2.8530625653 AU Mag: H = 12.21, G = 0.15 Epoch of elements : MJD 60531.63398625 TDT (2024 Aug 09.6340) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,2.12,2024,8,9,15.215648,-0.032800,0.691729,-5.546875,-0.263095,0.001433,0.002294,0.000001,0.000000 118.0802,-40.9338,-46.87,15.58,False TYC 7952-01945-1,20.29995832,-41.0102242,9.77,8.53,7.86,0.5,4,,20.32800781,-40.9338149,8.12,8.34,0,0,0 4521,Akimov,16.65,20.902,1.9888,0,0,-2.164,-1.16,,1.6,0 0,38.2079,2024,8,9,211.6912,48.0433,14.3775,0.08517,3.11869,2.85306,12.20,5.0,0.15 1.404,0.0317,0.0047,81,0.0059,Known errors,2.12,0,-1,-1 20240809_1945-1,60140.24 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:43 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org