IOTA/IOTA-ES occultation update for (3224) Irkutsk / UCAC4 534-005459 event on 2024 Dec 06, 12:04 UT Visible from Summary ------- On 2024 Dec 06 UT, the 29.845 km diameter asteroid (3224) Irkutsk will occult a 11.7 mag star in the constellation Aries for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.00 mag to 16.66 mag (the magnitude of the asteroid) for at most 2.420 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 Dec 06, 11:56 - 2024 Dec 06, 12:13 * geocentric midpoint of event [JD]: 2460651.00336321 * magnitude of target star: 11.67 * magnitude drop [mag]: 5.00 * estimated maximum duration [s]: 2.420 * Moon: 28 % sunlit, 91° distance * Sun: 155° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 30 * 1 sigma uncertainty interval [path widths]: +/- 0.14 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.002", 79°) * approx speed of asteroid's shadow [km/s]: 12.3224 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 534-005459 by 3224 Irkutsk on 2024 Dec 6 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 62 0 0 -10 35 41 12 13 22.1 1 73 25 -10 27 7 -10 44 15 -10 24 42 -10 46 40 .... 63 0 0 -10 17 6 12 13 21.9 2 73 24 -10 8 32 -10 25 41 -10 6 6 -10 28 6 -0.16 64 0 0 - 9 58 8 12 13 21.5 3 73 23 - 9 49 32 -10 6 43 - 9 47 6 -10 9 9 -0.16 65 0 0 - 9 38 46 12 13 21.0 4 72 22 - 9 30 10 - 9 47 23 - 9 27 44 - 9 49 48 -0.15 66 0 0 - 9 19 2 12 13 20.3 5 72 21 - 9 10 24 - 9 27 39 - 9 7 58 - 9 30 5 -0.15 67 0 0 - 8 58 55 12 13 19.5 6 72 19 - 8 50 16 - 9 7 33 - 8 47 50 - 9 9 59 -0.15 68 0 0 - 8 38 25 12 13 18.4 7 72 18 - 8 29 46 - 8 47 4 - 8 27 19 - 8 49 31 -0.15 69 0 0 - 8 17 34 12 13 17.2 8 72 17 - 8 8 54 - 8 26 14 - 8 6 26 - 8 28 41 -0.15 70 0 0 - 7 56 21 12 13 15.8 9 72 16 - 7 47 40 - 8 5 2 - 7 45 12 - 8 7 29 -0.15 71 0 0 - 7 34 47 12 13 14.3 10 71 15 - 7 26 5 - 7 43 29 - 7 23 37 - 7 45 56 -0.15 72 0 0 - 7 12 52 12 13 12.5 11 71 14 - 7 4 9 - 7 21 34 - 7 1 41 - 7 24 2 -0.15 73 0 0 - 6 50 36 12 13 10.6 12 71 13 - 6 41 52 - 6 59 20 - 6 39 24 - 7 1 48 -0.15 74 0 0 - 6 28 0 12 13 8.5 13 71 12 - 6 19 15 - 6 36 45 - 6 16 47 - 6 39 13 -0.15 75 0 0 - 6 5 5 12 13 6.2 14 71 11 - 5 56 19 - 6 13 50 - 5 53 50 - 6 16 19 -0.15 76 0 0 - 5 41 50 12 13 3.8 15 71 10 - 5 33 4 - 5 50 37 - 5 30 35 - 5 53 5 -0.15 77 0 0 - 5 18 17 12 13 1.2 16 71 9 - 5 9 29 - 5 27 4 - 5 7 0 - 5 29 33 -0.15 78 0 0 - 4 54 25 12 12 58.4 17 71 8 - 4 45 36 - 5 3 13 - 4 43 7 - 5 5 42 -0.15 79 0 0 - 4 30 15 12 12 55.4 18 71 7 - 4 21 26 - 4 39 4 - 4 18 56 - 4 41 34 -0.15 80 0 0 - 4 5 48 12 12 52.2 19 71 6 - 3 56 58 - 4 14 38 - 3 54 28 - 4 17 8 -0.15 81 0 0 - 3 41 4 12 12 48.9 21 71 5 - 3 32 13 - 3 49 55 - 3 29 43 - 3 52 25 -0.15 82 0 0 - 3 16 4 12 12 45.4 22 71 4 - 3 7 12 - 3 24 55 - 3 4 42 - 3 27 25 -0.15 83 0 0 - 2 50 47 12 12 41.7 23 71 3 - 2 41 55 - 2 59 40 - 2 39 24 - 3 2 10 -0.15 84 0 0 - 2 25 16 12 12 37.9 24 71 2 - 2 16 22 - 2 34 9 - 2 13 52 - 2 36 40 -0.14 85 0 0 - 1 59 29 12 12 33.8 25 71 0 - 1 50 35 - 2 8 23 - 1 48 4 - 2 10 54 -0.14 86 0 0 - 1 33 29 12 12 29.7 26 71 -1 - 1 24 34 - 1 42 24 - 1 22 3 - 1 44 55 -0.14 87 0 0 - 1 7 15 12 12 25.3 27 71 -2 - 0 58 19 - 1 16 10 - 0 55 48 - 1 18 41 -0.14 88 0 0 - 0 40 48 12 12 20.8 28 71 -3 - 0 31 52 - 0 49 44 - 0 29 20 - 0 52 15 -0.14 89 0 0 - 0 14 8 12 12 16.1 29 71 -4 - 0 5 11 - 0 23 5 - 0 2 40 - 0 25 37 -0.14 90 0 0 0 12 43 12 12 11.2 30 71 -5 0 21 40 0 3 46 0 24 12 0 1 14 -0.14 91 0 0 0 39 45 12 12 6.2 31 71 -6 0 48 43 0 30 47 0 51 16 0 28 15 -0.14 92 0 0 1 6 58 12 12 1.0 32 71 -7 1 15 57 0 58 0 1 18 29 0 55 28 -0.14 93 0 0 1 34 21 12 11 55.7 33 71 -8 1 43 20 1 25 22 1 45 53 1 22 50 -0.14 94 0 0 2 1 53 12 11 50.2 34 71 -9 2 10 53 1 52 53 2 13 25 1 50 21 -0.14 95 0 0 2 29 33 12 11 44.5 35 71 -10 2 38 34 2 20 33 2 41 6 2 18 1 -0.14 96 0 0 2 57 22 12 11 38.7 37 71 -11 3 6 22 2 48 21 3 8 55 2 45 48 -0.14 97 0 0 3 25 17 12 11 32.8 38 71 -12 3 34 18 3 16 16 3 36 51 3 13 43 -0.15 98 0 0 3 53 19 12 11 26.7 39 72 -14 4 2 21 3 44 18 4 4 54 3 41 45 -0.15 99 0 0 4 21 27 12 11 20.5 40 72 -15 4 30 29 4 12 25 4 33 2 4 9 52 -0.15 100 0 0 4 49 40 12 11 14.1 41 72 -16 4 58 42 4 40 38 5 1 16 4 38 4 -0.15 101 0 0 5 17 57 12 11 7.6 42 72 -17 5 27 0 5 8 55 5 29 33 5 6 21 -0.15 102 0 0 5 46 18 12 11 0.9 43 72 -18 5 55 21 5 37 15 5 57 55 5 34 42 -0.15 103 0 0 6 14 42 12 10 54.2 44 73 -19 6 23 45 6 5 39 6 26 19 6 3 6 -0.15 104 0 0 6 43 8 12 10 47.3 45 73 -20 6 52 12 6 34 5 6 54 45 6 31 32 -0.15 105 0 0 7 11 36 12 10 40.3 46 73 -21 7 20 40 7 2 33 7 23 13 6 59 59 -0.15 106 0 0 7 40 5 12 10 33.1 47 74 -22 7 49 8 7 31 1 7 51 42 7 28 28 -0.15 107 0 0 8 8 34 12 10 25.9 48 74 -23 8 17 37 7 59 30 8 20 11 7 56 56 -0.15 108 0 0 8 37 2 12 10 18.5 49 74 -24 8 46 6 8 27 58 8 48 40 8 25 24 -0.15 109 0 0 9 5 29 12 10 11.1 50 75 -25 9 14 33 8 56 25 9 17 7 8 53 51 -0.15 110 0 0 9 33 54 12 10 3.5 51 75 -26 9 42 58 9 24 50 9 45 32 9 22 17 -0.15 111 0 0 10 2 16 12 9 55.9 52 76 -27 10 11 20 9 53 13 10 13 54 9 50 39 -0.15 112 0 0 10 30 36 12 9 48.1 53 76 -28 10 39 40 10 21 32 10 42 13 10 18 58 -0.15 113 0 0 10 58 51 12 9 40.3 55 76 -30 11 7 55 10 49 47 11 10 28 10 47 14 -0.15 114 0 0 11 27 1 12 9 32.3 56 77 -31 11 36 5 11 17 58 11 38 39 11 15 24 -0.15 115 0 0 11 55 7 12 9 24.3 57 78 -32 12 4 10 11 46 3 12 6 44 11 43 30 -0.15 116 0 0 12 23 6 12 9 16.3 58 78 -33 12 32 9 12 14 3 12 34 43 12 11 29 -0.15 117 0 0 12 50 58 12 9 8.1 59 79 -34 13 0 1 12 41 55 13 2 35 12 39 22 -0.15 118 0 0 13 18 44 12 8 59.9 60 79 -35 13 27 47 13 9 41 13 30 20 13 7 8 -0.15 119 0 0 13 46 21 12 8 51.6 61 80 -36 13 55 24 13 37 19 13 57 57 13 34 45 -0.15 120 0 0 14 13 50 12 8 43.2 62 81 -37 14 22 52 14 4 48 14 25 26 14 2 15 -0.15 121 0 0 14 41 10 12 8 34.9 63 82 -38 14 50 12 14 32 8 14 52 45 14 29 35 -0.15 122 0 0 15 8 20 12 8 26.4 64 83 -39 15 17 22 14 59 19 15 19 55 14 56 46 -0.15 123 0 0 15 35 20 12 8 17.9 65 84 -40 15 44 21 15 26 19 15 46 54 15 23 46 -0.15 124 0 0 16 2 9 12 8 9.4 66 85 -41 16 11 10 15 53 9 16 13 43 15 50 36 -0.15 125 0 0 16 28 47 12 8 0.8 66 86 -42 16 37 47 16 19 47 16 40 20 16 17 14 -0.15 126 0 0 16 55 12 12 7 52.2 67 87 -43 17 4 12 16 46 13 17 6 45 16 43 40 -0.15 127 0 0 17 21 26 12 7 43.6 68 88 -44 17 30 25 17 12 27 17 32 58 17 9 54 -0.15 128 0 0 17 47 26 12 7 34.9 69 89 -45 17 56 25 17 38 28 17 58 57 17 35 56 -0.15 129 0 0 18 13 13 12 7 26.2 70 91 -46 18 22 11 18 4 15 18 24 43 18 1 43 -0.15 130 0 0 18 38 46 12 7 17.5 71 92 -47 18 47 44 18 29 49 18 50 16 18 27 17 -0.15 131 0 0 19 4 5 12 7 8.8 72 94 -48 19 13 2 18 55 8 19 15 34 18 52 37 -0.15 132 0 0 19 29 9 12 7 0.1 73 96 -49 19 38 5 19 20 13 19 40 37 19 17 41 -0.15 133 0 0 19 53 57 12 6 51.4 74 98 -50 20 2 53 19 45 2 20 5 24 19 42 31 -0.15 134 0 0 20 18 30 12 6 42.6 75 100 -51 20 27 25 20 9 36 20 29 56 20 7 4 -0.15 135 0 0 20 42 47 12 6 33.9 75 103 -52 20 51 41 20 33 53 20 54 12 20 31 22 -0.15 136 0 0 21 6 47 12 6 25.2 76 106 -53 21 15 41 20 57 54 21 18 12 20 55 24 -0.15 137 0 0 21 30 31 12 6 16.4 77 109 -54 21 39 24 21 21 39 21 41 54 21 19 8 -0.16 138 0 0 21 53 57 12 6 7.7 78 112 -55 22 2 49 21 45 6 22 5 20 21 42 35 -0.16 139 0 0 22 17 6 12 5 59.0 78 116 -56 22 25 57 22 8 15 22 28 28 22 5 45 -0.16 140 0 0 22 39 57 12 5 50.4 79 120 -56 22 48 48 22 31 7 22 51 18 22 28 37 -0.16 141 0 0 23 2 30 12 5 41.7 79 124 -57 23 11 20 22 53 41 23 13 50 22 51 11 -0.16 142 0 0 23 24 45 12 5 33.1 80 129 -58 23 33 33 23 15 56 23 36 3 23 13 27 -0.16 143 0 0 23 46 41 12 5 24.5 80 135 -59 23 55 28 23 37 53 23 57 58 23 35 24 -0.16 144 0 0 24 8 17 12 5 15.9 80 140 -60 24 17 4 23 59 30 24 19 33 23 57 2 -0.16 145 0 0 24 29 35 12 5 7.3 81 146 -61 24 38 21 24 20 49 24 40 50 24 18 20 -0.16 146 0 0 24 50 33 12 4 58.8 81 153 -62 24 59 18 24 41 48 25 1 47 24 39 19 -0.16 147 0 0 25 11 11 12 4 50.3 81 159 -63 25 19 56 25 2 27 25 22 24 24 59 59 -0.16 148 0 0 25 31 30 12 4 41.9 81 165 -64 25 40 13 25 22 46 25 42 42 25 20 18 -0.16 149 0 0 25 51 28 12 4 33.5 81 172 -65 26 0 11 25 42 46 26 2 39 25 40 18 -0.16 150 0 0 26 11 6 12 4 25.1 80 178 -65 26 19 48 26 2 25 26 22 16 25 59 57 -0.16 151 0 0 26 30 24 12 4 16.8 80 183 -66 26 39 5 26 21 43 26 41 32 26 19 16 -0.16 152 0 0 26 49 21 12 4 8.5 80 188 -67 26 58 1 26 40 41 27 0 28 26 38 14 -0.16 153 0 0 27 7 57 12 4 0.3 79 193 -68 27 16 37 26 59 18 27 19 3 26 56 52 -0.16 154 0 0 27 26 13 12 3 52.1 79 198 -69 27 34 51 27 17 35 27 37 18 27 15 8 -0.16 155 0 0 27 44 7 12 3 44.0 78 202 -69 27 52 45 27 35 30 27 55 11 27 33 4 -0.16 156 0 0 28 1 40 12 3 35.9 78 205 -70 28 10 17 27 53 4 28 12 43 27 50 38 -0.16 157 0 0 28 18 52 12 3 27.9 77 208 -71 28 27 28 28 10 17 28 29 54 28 7 51 -0.16 158 0 0 28 35 43 12 3 19.9 76 211 -72 28 44 18 28 27 8 28 46 43 28 24 43 -0.16 159 0 0 28 52 12 12 3 12.0 76 214 -73 29 0 46 28 43 38 29 3 11 28 41 13 -0.16 160 0 0 29 8 20 12 3 4.1 75 217 -73 29 16 53 28 59 47 29 19 18 28 57 22 -0.16 161 0 0 29 24 6 12 2 56.3 74 219 -74 29 32 38 29 15 34 29 35 3 29 13 9 -0.16 162 0 0 29 39 30 12 2 48.6 73 221 -75 29 48 1 29 30 59 29 50 26 29 28 34 -0.16 163 0 0 29 54 33 12 2 40.9 73 223 -75 30 3 3 29 46 2 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0 31 3 18 11 56 30.0 11 283 -36 31 11 44 30 54 52 31 14 8 30 52 29 -0.16 -120 0 0 30 49 43 11 56 28.5 10 283 -35 30 58 10 30 41 16 31 0 33 30 38 52 -0.16 -119 0 0 30 35 44 11 56 27.1 10 284 -34 30 44 12 30 27 16 30 46 36 30 24 52 -0.16 -118 0 0 30 21 21 11 56 25.8 9 284 -33 30 29 50 30 12 52 30 32 14 30 10 28 -0.17 -117 0 0 30 6 35 11 56 24.6 8 285 -33 30 15 4 29 58 5 30 17 29 29 55 41 -0.17 -116 0 0 29 51 24 11 56 23.5 7 285 -32 29 59 55 29 42 54 30 2 20 29 40 29 -0.17 -115 0 0 29 35 50 11 56 22.6 6 286 -31 29 44 22 29 27 19 29 46 47 29 24 54 -0.17 -114 0 0 29 19 52 11 56 21.8 5 286 -30 29 28 25 29 11 20 29 30 50 29 8 55 -0.18 -113 0 0 29 3 31 11 56 21.1 4 287 -29 29 12 5 28 54 57 29 14 30 28 52 32 -0.19 -112 0 0 28 46 46 11 56 20.6 3 287 -28 28 55 20 28 38 11 28 57 46 28 35 46 -0.20 -111 0 0 28 29 37 11 56 20.2 2 288 -27 28 38 12 28 21 1 28 40 38 28 18 35 -0.22 -110 0 0 28 12 4 11 56 19.9 1 288 -26 28 20 41 28 3 27 28 23 7 28 1 1 -0.28 -109 0 0 27 54 8 11 56 19.7 0 289 -25 28 2 45 27 45 30 28 5 12 27 43 4 -0.56 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 534-005459 * constellation : Aries * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 03 07 41.6727 DE: +16 36 53.000 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 03 07 41.6726 DE: +16 36 53.000 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.7 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3224) Irkutsk asteroid class: approx. diameter [km]: 30 approx. diameter ["]: 0.018 distance from Earth [AU]: 2.32630 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 date of fit: 2023 Feb 09 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): 0.013", 0.002", 78.707° remarks: * orbital elements for (3224)Irkutsk : Mean anomaly = 186.1935895847 deg Arg. of pericenter = 4.3213377792 deg Long. of node = 227.8034834638 deg Inclination = 4.3171698828 deg Eccentricity = 0.1647074468 Semimajor axis = 2.7868465470 AU Perihelion dist = 2.3278321675 AU Mag: H = 11.74, G = 0.15 Epoch of elements : MJD 60650.50335984 TDT (2024 Dec 06.5034) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Feb09,2.42,2024,12,6,12.080717,-0.052611,0.144977,-6.533453,-2.384899,0.002501,0.000794,0.000001,0.000000 150.2986,16.7122,-3.40,-22.58,False UCAC4 534-005459,3.12824243,16.6147223,12.04,11.67,11.47,0.0,0,,3.15185731,16.7122187,5.00,4.75,0,0,0 3224,Irkutsk,16.66,29.845,2.3263,0,0,-1.718,-9.01,,1.8,0 0,186.0870,2024,12,6,4.3213,227.8035,4.3172,0.16471,2.78685,2.32783,11.73,5.0,0.15 1.141,0.0130,0.0016,79,0.0025,Known errors,0.79,0,-1,-1 20241206_005459,60140.73 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org