IOTA/IOTA-ES occultation update for 2004 KC19 / UCAC4 351-142278 event on 2023 May 22, 22:52 UT Visible from Summary ------- On 2023 May 22 UT, the 75.9 km diameter asteroid 2004 KC19 will occult a 13.7 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 9.52 mag to 23.19 mag (the magnitude of the asteroid) for at most 4.290 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: 0 * date and approx. time of event: 2023 May 22, 22:57 - 2023 May 22, 23:05 * geocentric midpoint of event [JD]: 2460087.45946187 * magnitude of target star: 13.67 * magnitude drop [mag]: 9.52 * estimated maximum duration [s]: 4.290 * Moon: 11 % sunlit, 172° distance * Sun: 143° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 120 * 1 sigma uncertainty interval [path widths]: +/- 398.10 * 1 sigma uncertainty interval [seconds]: +/- 8086.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 6.561, +/- 1.253) * 1 sigma uncertainty ellipse (major, minor, PA): (6.628", 0.831", 82°) * approx speed of asteroid's shadow [km/s]: 17.6643 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 351-142278 by 0 2004 KC19 on 2023 May 22 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 - 14 0 0 48 9 43 23 5 25.3 0 121 -17 .. .. .. 47 32 2 .. .. .. .. .. .. .... - 13 0 0 47 46 5 23 5 25.3 1 121 -18 48 24 17 47 8 29 .. .. .. .. .. .. -0.58 - 12 0 0 47 22 29 23 5 25.1 2 122 -19 48 0 35 46 44 58 .. .. .. .. .. .. -0.85 - 11 0 0 46 58 56 23 5 24.8 3 123 -19 47 36 57 46 21 30 .. .. .. .. .. .. -0.97 - 10 0 0 46 35 27 23 5 24.4 3 124 -20 47 13 22 45 58 7 .. .. .. .. .. .. -1.03 - 9 0 0 46 12 2 23 5 23.8 4 124 -21 46 49 51 45 34 48 .. .. .. .. .. .. -1.07 - 8 0 0 45 48 43 23 5 23.2 5 125 -21 46 26 26 45 11 34 .. .. .. .. .. .. -1.10 - 7 0 0 45 25 30 23 5 22.5 6 126 -22 46 3 7 44 48 27 .. .. .. .. .. .. -1.12 - 6 0 0 45 2 24 23 5 21.6 7 127 -22 45 39 54 44 25 27 .. .. .. .. .. .. -1.13 - 5 0 0 44 39 26 23 5 20.7 7 127 -23 45 16 50 44 2 35 .. .. .. .. .. .. -1.14 - 4 0 0 44 16 35 23 5 19.6 8 128 -24 44 53 53 43 39 51 .. .. .. .. .. .. -1.15 - 3 0 0 43 53 54 23 5 18.4 9 129 -24 44 31 5 43 17 17 .. .. .. .. .. .. -1.16 - 2 0 0 43 31 23 23 5 17.1 10 129 -25 44 8 28 42 54 52 .. .. .. .. .. .. -1.17 - 1 0 0 43 9 3 23 5 15.6 11 130 -25 43 46 0 42 32 37 .. .. .. .. .. .. -1.17 0 0 0 42 46 53 23 5 14.1 11 131 -26 43 23 44 42 10 34 .. .. .. .. .. .. -1.18 1 0 0 42 24 55 23 5 12.4 12 132 -26 43 1 39 41 48 43 .. .. .. .. .. .. -1.18 2 0 0 42 3 10 23 5 10.7 13 132 -27 42 39 47 41 27 4 .. .. .. .. .. .. -1.19 3 0 0 41 41 38 23 5 8.8 14 133 -27 42 18 8 41 5 39 .. .. .. .. .. .. -1.19 4 0 0 41 20 19 23 5 6.8 15 134 -28 41 56 43 40 44 27 .. .. .. .. .. .. -1.19 5 0 0 40 59 15 23 5 4.7 15 134 -28 41 35 32 40 23 29 .. .. .. .. .. .. -1.19 6 0 0 40 38 26 23 5 2.5 16 135 -29 41 14 36 40 2 47 .. .. .. .. .. .. -1.20 7 0 0 40 17 53 23 5 0.1 17 136 -29 40 53 56 39 42 20 .. .. .. .. .. .. -1.20 8 0 0 39 57 35 23 4 57.7 18 137 -30 40 33 31 39 22 9 .. .. .. .. .. .. -1.20 9 0 0 39 37 34 23 4 55.1 18 137 -30 40 13 24 39 2 14 .. .. .. .. .. .. -1.20 10 0 0 39 17 51 23 4 52.5 19 138 -30 39 53 34 38 42 37 .. .. .. .. .. .. -1.20 11 0 0 38 58 25 23 4 49.7 20 139 -31 39 34 1 38 23 18 .. .. .. .. .. .. -1.21 12 0 0 38 39 17 23 4 46.8 21 140 -31 39 14 47 38 4 17 .. .. .. .. .. .. -1.21 13 0 0 38 20 28 23 4 43.8 21 140 -31 38 55 51 37 45 34 .. .. .. .. .. .. -1.21 14 0 0 38 1 59 23 4 40.8 22 141 -32 38 37 15 37 27 10 .. .. .. .. .. .. -1.21 15 0 0 37 43 49 23 4 37.6 23 142 -32 38 18 59 37 9 6 .. .. .. .. .. .. -1.21 16 0 0 37 25 59 23 4 34.3 24 143 -32 38 1 3 36 51 23 .. .. .. .. .. .. -1.21 17 0 0 37 8 29 23 4 30.9 24 144 -32 37 43 27 36 33 59 .. .. .. .. .. .. -1.21 18 0 0 36 51 21 23 4 27.4 25 144 -33 37 26 12 36 16 56 .. .. .. .. .. .. -1.21 19 0 0 36 34 33 23 4 23.9 26 145 -33 37 9 19 36 0 15 .. .. .. .. .. .. -1.21 20 0 0 36 18 8 23 4 20.2 26 146 -33 36 52 48 35 43 55 .. .. .. .. .. .. -1.21 21 0 0 36 2 4 23 4 16.5 27 147 -33 36 36 38 35 27 57 .. .. .. .. .. .. -1.21 22 0 0 35 46 23 23 4 12.6 28 148 -33 36 20 52 35 12 21 .. .. .. .. .. .. -1.21 23 0 0 35 31 5 23 4 8.7 28 149 -33 36 5 28 34 57 8 .. .. .. .. .. .. -1.22 24 0 0 35 16 10 23 4 4.7 29 149 -33 35 50 27 34 42 18 .. .. .. .. .. .. -1.22 25 0 0 35 1 38 23 4 0.7 29 150 -34 35 35 50 34 27 52 .. .. .. .. .. .. -1.22 26 0 0 34 47 30 23 3 56.5 30 151 -34 35 21 37 34 13 49 .. .. .. .. .. .. -1.22 27 0 0 34 33 46 23 3 52.3 31 152 -34 35 7 47 34 0 9 .. .. .. .. .. .. -1.22 28 0 0 34 20 26 23 3 48.0 31 153 -34 34 54 23 33 46 54 .. .. .. .. .. .. -1.22 29 0 0 34 7 30 23 3 43.6 32 154 -34 34 41 22 33 34 3 .. .. .. .. .. .. -1.22 30 0 0 33 55 0 23 3 39.1 32 155 -33 34 28 47 33 21 37 .. .. .. .. .. .. -1.22 31 0 0 33 42 54 23 3 34.6 33 156 -33 34 16 37 33 9 35 .. .. .. .. .. .. -1.22 32 0 0 33 31 13 23 3 30.0 33 157 -33 34 4 52 32 57 59 .. .. .. .. .. .. -1.22 33 0 0 33 19 58 23 3 25.4 34 158 -33 33 53 33 32 46 48 .. .. .. .. .. .. -1.22 34 0 0 33 9 9 23 3 20.7 34 159 -33 33 42 39 32 36 2 .. .. .. .. .. .. -1.22 35 0 0 32 58 45 23 3 16.0 35 160 -33 33 32 12 32 25 42 .. .. .. .. .. .. -1.22 36 0 0 32 48 47 23 3 11.2 35 161 -33 33 22 10 32 15 48 .. .. .. .. .. .. -1.22 37 0 0 32 39 16 23 3 6.3 36 162 -32 33 12 35 32 6 20 .. .. .. .. .. .. -1.22 38 0 0 32 30 10 23 3 1.4 36 163 -32 33 3 27 31 57 18 .. .. .. .. .. .. -1.22 39 0 0 32 21 32 23 2 56.5 36 164 -32 32 54 45 31 48 42 .. .. .. .. .. .. -1.22 40 0 0 32 13 19 23 2 51.5 37 165 -32 32 46 29 31 40 33 .. .. .. .. .. .. -1.22 41 0 0 32 5 34 23 2 46.5 37 166 -31 32 38 41 31 32 50 .. .. .. .. .. .. -1.22 42 0 0 31 58 15 23 2 41.4 37 167 -31 32 31 20 31 25 34 .. .. .. .. .. .. -1.22 43 0 0 31 51 24 23 2 36.3 38 169 -31 32 24 26 31 18 45 .. .. .. .. .. .. -1.22 44 0 0 31 44 59 23 2 31.2 38 170 -30 32 17 59 31 12 23 .. .. .. .. .. .. -1.22 45 0 0 31 39 2 23 2 26.0 38 171 -30 32 12 0 31 6 28 .. .. .. .. .. .. -1.22 46 0 0 31 33 32 23 2 20.9 38 172 -30 32 6 28 31 1 0 .. .. .. .. .. .. -1.22 47 0 0 31 28 30 23 2 15.7 39 173 -29 32 1 23 30 55 59 .. .. .. .. .. .. -1.22 48 0 0 31 23 54 23 2 10.4 39 174 -29 31 56 46 30 51 26 .. .. .. .. .. .. -1.22 49 0 0 31 19 47 23 2 5.2 39 175 -28 31 52 37 30 47 19 .. .. .. .. .. .. -1.22 50 0 0 31 16 7 23 1 59.9 39 177 -28 31 48 56 30 43 41 .. .. .. .. .. .. -1.22 51 0 0 31 12 54 23 1 54.7 39 178 -27 31 45 42 30 40 29 .. .. .. .. .. .. -1.22 52 0 0 31 10 10 23 1 49.4 39 179 -27 31 42 56 30 37 46 .. .. .. .. .. .. -1.22 53 0 0 31 7 53 23 1 44.1 39 180 -26 31 40 39 30 35 30 .. .. .. .. .. .. -1.22 54 0 0 31 6 4 23 1 38.8 39 181 -26 31 38 49 30 33 41 .. .. .. .. .. .. -1.22 55 0 0 31 4 42 23 1 33.6 39 183 -25 31 37 27 30 32 20 .. .. .. .. .. .. -1.23 56 0 0 31 3 48 23 1 28.3 39 184 -25 31 36 33 30 31 27 .. .. .. .. .. .. -1.23 57 0 0 31 3 23 23 1 23.0 39 185 -24 31 36 7 30 31 1 .. .. .. .. .. .. -1.23 58 0 0 31 3 25 23 1 17.7 39 186 -23 31 36 9 30 31 3 .. .. .. .. .. .. -1.23 59 0 0 31 3 55 23 1 12.5 39 187 -23 31 36 39 30 31 33 .. .. .. .. .. .. -1.23 60 0 0 31 4 53 23 1 7.2 39 188 -22 31 37 37 30 32 30 .. .. .. .. .. .. -1.23 61 0 0 31 6 18 23 1 2.0 39 190 -22 31 39 4 30 33 55 .. .. .. .. .. .. -1.23 62 0 0 31 8 12 23 0 56.8 38 191 -21 31 40 58 30 35 48 .. .. .. .. .. .. -1.23 63 0 0 31 10 33 23 0 51.6 38 192 -20 31 43 20 30 38 8 .. .. .. .. .. .. -1.23 64 0 0 31 13 22 23 0 46.4 38 193 -20 31 46 10 30 40 56 .. .. .. .. .. .. -1.23 65 0 0 31 16 38 23 0 41.3 38 194 -19 31 49 28 30 44 12 .. .. .. .. .. .. -1.23 66 0 0 31 20 23 23 0 36.2 38 195 -18 31 53 14 30 47 55 .. .. .. .. .. .. -1.23 67 0 0 31 24 35 23 0 31.1 37 196 -18 31 57 27 30 52 5 .. .. .. .. .. .. -1.23 68 0 0 31 29 14 23 0 26.1 37 198 -17 32 2 9 30 56 43 .. .. .. .. .. .. -1.23 69 0 0 31 34 22 23 0 21.0 37 199 -16 32 7 18 31 1 48 .. .. .. .. .. .. -1.23 70 0 0 31 39 56 23 0 16.1 36 200 -15 32 12 54 31 7 21 .. .. .. .. .. .. -1.23 71 0 0 31 45 58 23 0 11.2 36 201 -15 32 18 58 31 13 21 .. .. .. .. .. .. -1.23 72 0 0 31 52 27 23 0 6.3 35 202 -14 32 25 30 31 19 47 .. .. .. .. .. .. -1.23 73 0 0 31 59 23 23 0 1.5 35 203 -13 32 32 29 31 26 41 .. .. .. .. .. .. -1.23 74 0 0 32 6 47 22 59 56.7 35 204 -12 32 39 55 31 34 2 .. .. .. .. .. .. -1.23 75 0 0 32 14 37 22 59 52.0 34 205 -12 32 47 48 31 41 49 .. .. .. .. .. .. -1.23 76 0 0 32 22 54 22 59 47.3 34 206 -11 32 56 9 31 50 3 .. .. .. .. .. .. -1.23 77 0 0 32 31 38 22 59 42.7 33 207 -10 33 4 56 31 58 44 .. .. .. .. .. .. -1.23 78 0 0 32 40 48 22 59 38.1 33 208 -9 33 14 10 32 7 51 .. .. .. .. .. .. -1.24 79 0 0 32 50 25 22 59 33.7 32 209 -9 33 23 50 32 17 24 .. .. .. .. .. .. -1.24 80 0 0 33 0 28 22 59 29.2 32 210 -8 33 33 57 32 27 24 .. .. .. .. .. .. -1.24 81 0 0 33 10 57 22 59 24.9 31 211 -7 33 44 30 32 37 49 .. .. .. .. .. .. -1.24 82 0 0 33 21 52 22 59 20.6 30 211 -6 33 55 29 32 48 40 .. .. .. .. .. .. -1.24 83 0 0 33 33 13 22 59 16.4 30 212 -5 34 6 54 32 59 57 .. .. .. .. .. .. -1.24 84 0 0 33 44 59 22 59 12.3 29 213 -4 34 18 45 33 11 39 .. .. .. .. .. .. -1.24 85 0 0 33 57 11 22 59 8.2 29 214 -4 34 31 1 33 23 46 .. .. .. .. .. .. -1.24 86 0 0 34 9 48 22 59 4.3 28 215 -3 34 43 42 33 36 18 .. .. .. .. .. .. -1.24 87 0 0 34 22 49 22 59 0.4 27 216 -2 34 56 48 33 49 15 .. .. .. .. .. .. -1.24 88 0 0 34 36 15 22 58 56.6 27 217 -1 35 10 19 34 2 37 .. .. .. .. .. .. -1.24 89 0 0 34 50 6 22 58 52.9 26 217 0 35 24 15 34 16 22 .. .. .. .. .. .. -1.24 90 0 0 35 4 20 22 58 49.2 25 218 0 35 38 35 34 30 32 .. .. .. .. .. .. -1.24 91 0 0 35 18 58 22 58 45.7 25 219 1 35 53 18 34 45 5 .. .. .. .. .. .. -1.24 92 0 0 35 34 0 22 58 42.3 24 220 2 36 8 25 35 0 1 .. .. .. .. .. .. -1.24 93 0 0 35 49 25 22 58 38.9 23 221 3 36 23 56 35 15 21 .. .. .. .. .. .. -1.25 94 0 0 36 5 13 22 58 35.7 22 221 4 36 39 49 35 31 3 .. .. .. .. .. .. -1.25 95 0 0 36 21 23 22 58 32.5 22 222 5 36 56 6 35 47 8 .. .. .. .. .. .. -1.25 96 0 0 36 37 56 22 58 29.5 21 223 5 37 12 44 36 3 34 .. .. .. .. .. .. -1.25 97 0 0 36 54 50 22 58 26.6 20 224 6 37 29 44 36 20 23 .. .. .. .. .. .. -1.25 98 0 0 37 12 5 22 58 23.7 19 224 7 37 47 6 36 37 32 .. .. .. .. .. .. -1.25 99 0 0 37 29 42 22 58 21.0 19 225 8 38 4 49 36 55 3 .. .. .. .. .. .. -1.25 100 0 0 37 47 39 22 58 18.4 18 226 9 38 22 52 37 12 54 .. .. .. .. .. .. -1.25 101 0 0 38 5 56 22 58 15.8 17 226 10 38 41 16 37 31 5 .. .. .. .. .. .. -1.25 102 0 0 38 24 34 22 58 13.4 16 227 11 39 0 0 37 49 36 .. .. .. .. .. .. -1.25 103 0 0 38 43 30 22 58 11.2 16 228 11 39 19 3 38 8 26 .. .. .. .. .. .. -1.26 104 0 0 39 2 45 22 58 9.0 15 228 12 39 38 24 38 27 34 .. .. .. .. .. .. -1.26 105 0 0 39 22 18 22 58 6.9 14 229 13 39 58 4 38 47 1 .. .. .. .. .. .. -1.26 106 0 0 39 42 9 22 58 5.0 13 230 14 40 18 2 39 6 46 .. .. .. .. .. .. -1.26 107 0 0 40 2 17 22 58 3.1 12 231 15 40 38 17 39 26 47 .. .. .. .. .. .. -1.26 108 0 0 40 22 42 22 58 1.4 12 231 15 40 58 49 39 47 6 .. .. .. .. .. .. -1.26 109 0 0 40 43 23 22 57 59.8 11 232 16 41 19 36 40 7 40 .. .. .. .. .. .. -1.27 110 0 0 41 4 20 22 57 58.3 10 233 17 41 40 40 40 28 30 .. .. .. .. .. .. -1.27 111 0 0 41 25 31 22 57 57.0 9 233 18 42 1 58 40 49 35 .. .. .. .. .. .. -1.27 112 0 0 41 46 57 22 57 55.7 8 234 19 42 23 31 41 10 54 .. .. .. .. .. .. -1.27 113 0 0 42 8 36 22 57 54.6 8 235 20 42 45 17 41 32 27 .. .. .. .. .. .. -1.28 114 0 0 42 30 29 22 57 53.6 7 235 20 43 7 16 41 54 13 .. .. .. .. .. .. -1.28 115 0 0 42 52 34 22 57 52.7 6 236 21 43 29 28 42 16 11 .. .. .. .. .. .. -1.29 116 0 0 43 14 50 22 57 51.9 5 237 22 43 51 52 42 38 22 .. .. .. .. .. .. -1.29 117 0 0 43 37 18 22 57 51.2 4 237 23 44 14 26 43 0 43 .. .. .. .. .. .. -1.30 118 0 0 43 59 56 22 57 50.7 4 238 23 44 37 11 43 23 15 .. .. .. .. .. .. -1.32 119 0 0 44 22 44 22 57 50.3 3 239 24 45 0 5 43 45 56 .. .. .. .. .. .. -1.34 120 0 0 44 45 41 22 57 50.0 2 240 25 45 23 8 44 8 47 .. .. .. .. .. .. -1.38 121 0 0 45 8 45 22 57 49.8 1 240 26 45 46 20 44 31 45 .. .. .. .. .. .. -1.48 122 0 0 45 31 58 22 57 49.7 0 241 26 .. .. .. 44 54 52 .. .. .. .. .. .. -2.15 Uncertainty in time = +/- 8144 secs Prediction of 2022 Jun 15.2 Data for the target star ------------------------ * name: UCAC4 351-142278 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 32 57.1977 DE: -19 48 19.138 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 32 57.1978 DE: -19 48 19.138 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 13.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: 2004 KC19 asteroid class: TNO approx. diameter [km]: 76 approx. diameter ["]: 0.003 distance from Earth [AU]: 29.92970 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#5 date of fit: 2021 Apr 14 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): 6.628", 0.831", 81.796° remarks: * orbital elements for 2004 KC19 : Mean anomaly = 17.5885307010 deg Arg. of pericenter = 7.3352566706 deg Long. of node = 240.6768616487 deg Inclination = 5.6441263142 deg Eccentricity = 0.2351576411 Semimajor axis = 39.2556378483 AU Perihelion dist = 30.0243746503 AU Mag: H = 8.20, G = 0.15 Epoch of elements : MJD 60086.95326389 TDT (2023 May 22.9533) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#52021Apr14,4.29,2023,5,22,23.027085,0.020678,0.773211,-9.966698,0.264713,-0.003471,-0.000493,0.000001,0.000000 52.8693,-19.7884,-166.22,20.48,False UCAC4 351-142278,18.54922160,-19.8053160,0.00,13.67,0.00,0.0,0,,18.57241874,-19.7883720,9.51,0.00,0,0,0 0,2004 KC19,23.19,75.9,29.9297,0,0,-0.206,0.08,,7.6 0,17.5847,2023,5,22,7.3353,240.6769,5.6441,0.23516,39.25564,30.02437,8.20,5.0,0.15 399.102,6.6277,0.8307,82,1.3920,Known errors,-1.00,-1,-1,-1 20230522_142278,59745.16 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Jun 15, 03:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org