IOTA/IOTA-ES occultation update for (31762) 1999 JB104 / UCAC4 543-034150 event on 2024 Oct 13, 14:45 UT Visible from Summary ------- On 2024 Oct 13 UT, the 16.236 km diameter asteroid (31762) 1999 JB104 will occult a 12.0 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.08 mag to 18.03 mag (the magnitude of the asteroid) for at most 1.390 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 Oct 13, 14:38 - 2024 Oct 13, 14:53 * geocentric midpoint of event [JD]: 2460597.11523245 * magnitude of target star: 11.95 * magnitude drop [mag]: 6.08 * estimated maximum duration [s]: 1.390 * Moon: 80 % sunlit, 133° distance * Sun: 99° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 20 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 4.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.024, +/- 0.008) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.002", 74°) * approx speed of asteroid's shadow [km/s]: 11.6607 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 543-034150 by 31762 1999 JB104 on 2024 Oct 13 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 150 0 0 -45 7 55 14 38 23.5 0 63 -36 -45 13 49 -45 2 2 -45 17 17 -44 58 35 .... 151 0 0 -44 46 17 14 38 23.6 1 62 -36 -44 52 12 -44 40 23 -44 55 39 -44 36 56 0.32 152 0 0 -44 24 21 14 38 23.9 2 62 -36 -44 30 16 -44 18 26 -44 33 44 -44 14 58 0.45 153 0 0 -44 2 6 14 38 24.3 3 61 -36 -44 8 2 -43 56 11 -44 11 30 -43 52 43 0.51 154 0 0 -43 39 34 14 38 24.8 4 60 -36 -43 45 30 -43 33 38 -43 48 59 -43 30 10 0.54 155 0 0 -43 16 45 14 38 25.5 5 59 -36 -43 22 41 -43 10 49 -43 26 10 -43 7 20 0.56 156 0 0 -42 53 38 14 38 26.3 5 59 -36 -42 59 35 -42 47 42 -43 3 4 -42 44 13 0.57 157 0 0 -42 30 15 14 38 27.2 6 58 -36 -42 36 12 -42 24 18 -42 39 42 -42 20 49 0.59 158 0 0 -42 6 35 14 38 28.3 7 57 -36 -42 12 33 -42 0 38 -42 16 3 -41 57 9 0.59 159 0 0 -41 42 40 14 38 29.6 8 57 -36 -41 48 38 -41 36 42 -41 52 8 -41 33 13 0.60 160 0 0 -41 18 29 14 38 31.0 9 56 -36 -41 24 28 -41 12 31 -41 27 58 -41 9 1 0.61 161 0 0 -40 54 3 14 38 32.6 10 55 -36 -41 0 2 -40 48 5 -41 3 32 -40 44 35 0.61 162 0 0 -40 29 22 14 38 34.3 10 55 -36 -40 35 21 -40 23 24 -40 38 52 -40 19 54 0.61 163 0 0 -40 4 27 14 38 36.2 11 54 -36 -40 10 27 -39 58 28 -40 13 57 -39 54 58 0.62 164 0 0 -39 39 19 14 38 38.2 12 53 -36 -39 45 18 -39 33 20 -39 48 49 -39 29 49 0.62 165 0 0 -39 13 57 14 38 40.4 13 53 -36 -39 19 57 -39 7 58 -39 23 28 -39 4 27 0.62 166 0 0 -38 48 23 14 38 42.8 14 52 -36 -38 54 23 -38 42 23 -38 57 54 -38 38 53 0.62 167 0 0 -38 22 36 14 38 45.4 15 51 -36 -38 28 36 -38 16 36 -38 32 7 -38 13 6 0.63 168 0 0 -37 56 38 14 38 48.1 16 51 -36 -38 2 39 -37 50 39 -38 6 10 -37 47 8 0.63 169 0 0 -37 30 30 14 38 51.0 17 50 -35 -37 36 30 -37 24 30 -37 40 1 -37 20 59 0.63 170 0 0 -37 4 11 14 38 54.1 18 49 -35 -37 10 11 -36 58 11 -37 13 43 -36 54 40 0.63 171 0 0 -36 37 43 14 38 57.4 18 49 -35 -36 43 43 -36 31 43 -36 47 14 -36 28 12 0.63 172 0 0 -36 11 5 14 39 0.8 19 48 -35 -36 17 6 -36 5 5 -36 20 37 -36 1 35 0.63 173 0 0 -35 44 20 14 39 4.5 20 47 -35 -35 50 20 -35 38 20 -35 53 52 -35 34 49 0.63 174 0 0 -35 17 27 14 39 8.3 21 47 -34 -35 23 27 -35 11 27 -35 26 59 -35 7 57 0.64 175 0 0 -34 50 28 14 39 12.3 22 46 -34 -34 56 28 -34 44 28 -34 59 59 -34 40 57 0.64 176 0 0 -34 23 22 14 39 16.5 23 45 -34 -34 29 22 -34 17 23 -34 32 53 -34 13 52 0.64 177 0 0 -33 56 12 14 39 20.8 24 45 -33 -34 2 12 -33 50 12 -34 5 43 -33 46 42 0.64 178 0 0 -33 28 57 14 39 25.4 25 44 -33 -33 34 56 -33 22 57 -33 38 27 -33 19 27 0.64 179 0 0 -33 1 38 14 39 30.1 26 43 -33 -33 7 37 -32 55 39 -33 11 8 -32 52 9 0.64 -180 0 0 -32 34 16 14 39 35.0 27 42 -32 -32 40 16 -32 28 18 -32 43 46 -32 24 48 0.64 -179 0 0 -32 6 53 14 39 40.1 28 42 -32 -32 12 52 -32 0 55 -32 16 23 -31 57 25 0.64 -178 0 0 -31 39 29 14 39 45.4 28 41 -31 -31 45 27 -31 33 31 -31 48 58 -31 30 1 0.64 -177 0 0 -31 12 4 14 39 50.9 29 40 -31 -31 18 2 -31 6 6 -31 21 32 -31 2 37 0.64 -176 0 0 -30 44 40 14 39 56.6 30 40 -30 -30 50 37 -30 38 42 -30 54 7 -30 35 13 0.65 -175 0 0 -30 17 16 14 40 2.4 31 39 -30 -30 23 14 -30 11 19 -30 26 44 -30 7 50 0.65 -174 0 0 -29 49 56 14 40 8.4 32 38 -29 -29 55 53 -29 43 59 -29 59 22 -29 40 30 0.65 -173 0 0 -29 22 38 14 40 14.6 33 37 -29 -29 28 35 -29 16 42 -29 32 4 -29 13 13 0.65 -172 0 0 -28 55 24 14 40 21.0 34 36 -28 -29 1 20 -28 49 29 -29 4 49 -28 46 0 0.65 -171 0 0 -28 28 15 14 40 27.5 35 36 -28 -28 34 11 -28 22 20 -28 37 40 -28 18 52 0.65 -170 0 0 -28 1 12 14 40 34.2 36 35 -27 -28 7 7 -27 55 17 -28 10 36 -27 51 50 0.65 -169 0 0 -27 34 16 14 40 41.1 37 34 -26 -27 40 10 -27 28 21 -27 43 38 -27 24 54 0.65 -168 0 0 -27 7 26 14 40 48.2 37 33 -26 -27 13 20 -27 1 33 -27 16 48 -26 58 6 0.65 -167 0 0 -26 40 45 14 40 55.4 38 32 -25 -26 46 39 -26 34 52 -26 50 6 -26 31 26 0.65 -166 0 0 -26 14 13 14 41 2.7 39 31 -24 -26 20 6 -26 8 21 -26 23 33 -26 4 55 0.65 -165 0 0 -25 47 51 14 41 10.3 40 30 -24 -25 53 44 -25 42 0 -25 57 10 -25 38 34 0.65 -164 0 0 -25 21 40 14 41 17.9 41 29 -23 -25 27 32 -25 15 49 -25 30 58 -25 12 24 0.65 -163 0 0 -24 55 41 14 41 25.8 42 28 -22 -25 1 32 -24 49 50 -25 4 57 -24 46 25 0.66 -162 0 0 -24 29 54 14 41 33.7 43 27 -22 -24 35 44 -24 24 4 -24 39 9 -24 20 39 0.66 -161 0 0 -24 4 20 14 41 41.8 43 26 -21 -24 10 9 -23 58 31 -24 13 34 -23 55 6 0.66 -160 0 0 -23 39 0 14 41 50.1 44 25 -20 -23 44 49 -23 33 11 -23 48 13 -23 29 48 0.66 -159 0 0 -23 13 55 14 41 58.4 45 24 -19 -23 19 43 -23 8 7 -23 23 7 -23 4 44 0.66 -158 0 0 -22 49 5 14 42 6.9 46 23 -18 -22 54 53 -22 43 18 -22 58 16 -22 39 55 0.66 -157 0 0 -22 24 32 14 42 15.5 46 22 -18 -22 30 19 -22 18 46 -22 33 42 -22 15 23 0.66 -156 0 0 -22 0 16 14 42 24.3 47 21 -17 -22 6 2 -21 54 30 -22 9 25 -21 51 8 0.66 -155 0 0 -21 36 17 14 42 33.1 48 20 -16 -21 42 3 -21 30 33 -21 45 25 -21 27 11 0.66 -154 0 0 -21 12 38 14 42 42.0 49 18 -15 -21 18 22 -21 6 54 -21 21 44 -21 3 32 0.66 -153 0 0 -20 49 17 14 42 51.1 49 17 -14 -20 55 0 -20 43 33 -20 58 22 -20 40 13 0.66 -152 0 0 -20 26 16 14 43 0.2 50 16 -14 -20 31 59 -20 20 33 -20 35 20 -20 17 13 0.66 -151 0 0 -20 3 35 14 43 9.5 50 14 -13 -20 9 17 -19 57 53 -20 12 38 -19 54 33 0.66 -150 0 0 -19 41 15 14 43 18.8 51 13 -12 -19 46 57 -19 35 35 -19 50 17 -19 32 15 0.66 -149 0 0 -19 19 18 14 43 28.2 52 12 -11 -19 24 58 -19 13 37 -19 28 18 -19 10 18 0.67 -148 0 0 -18 57 42 14 43 37.6 52 10 -10 -19 3 22 -18 52 3 -19 6 41 -18 48 44 0.67 -147 0 0 -18 36 29 14 43 47.2 53 9 -9 -18 42 8 -18 30 51 -18 45 27 -18 27 32 0.67 -146 0 0 -18 15 40 14 43 56.8 53 7 -8 -18 21 18 -18 10 2 -18 24 36 -18 6 44 0.67 -145 0 0 -17 55 14 14 44 6.4 54 5 -7 -18 0 52 -17 49 37 -18 4 10 -17 46 20 0.67 -144 0 0 -17 35 13 14 44 16.1 54 4 -6 -17 40 50 -17 29 37 -17 44 7 -17 26 20 0.67 -143 0 0 -17 15 37 14 44 25.9 54 2 -6 -17 21 13 -17 10 1 -17 24 30 -17 6 45 0.67 -142 0 0 -16 56 26 14 44 35.7 55 0 -5 -17 2 1 -16 50 51 -17 5 18 -16 47 35 0.67 -141 0 0 -16 37 41 14 44 45.5 55 359 -4 -16 43 15 -16 32 6 -16 46 31 -16 28 51 0.67 -140 0 0 -16 19 22 14 44 55.4 55 357 -3 -16 24 56 -16 13 48 -16 28 11 -16 10 33 0.67 -139 0 0 -16 1 29 14 45 5.2 55 355 -2 -16 7 3 -15 55 57 -16 10 18 -15 52 42 0.67 -138 0 0 -15 44 4 14 45 15.1 56 353 -1 -15 49 37 -15 38 32 -15 52 51 -15 35 18 0.67 -137 0 0 -15 27 6 14 45 25.1 56 352 0 -15 32 38 -15 21 35 -15 35 52 -15 18 21 0.67 -136 0 0 -15 10 36 14 45 35.0 56 350 1 -15 16 7 -15 5 5 -15 19 21 -15 1 52 0.67 -135 0 0 -14 54 34 14 45 44.9 56 348 2 -15 0 4 -14 49 4 -15 3 18 -14 45 51 0.67 -134 0 0 -14 39 0 14 45 54.8 56 346 3 -14 44 30 -14 33 31 -14 47 43 -14 30 18 0.67 -133 0 0 -14 23 55 14 46 4.8 56 344 4 -14 29 24 -14 18 26 -14 32 37 -14 15 14 0.67 -132 0 0 -14 9 19 14 46 14.7 56 343 5 -14 14 47 -14 3 51 -14 18 0 -14 0 39 0.67 -131 0 0 -13 55 12 14 46 24.5 56 341 6 -14 0 40 -13 49 44 -14 3 52 -13 46 33 0.67 -130 0 0 -13 41 34 14 46 34.4 56 339 7 -13 47 1 -13 36 7 -13 50 13 -13 32 56 0.68 -129 0 0 -13 28 26 14 46 44.3 56 337 8 -13 33 53 -13 23 0 -13 37 5 -13 19 49 0.68 -128 0 0 -13 15 49 14 46 54.1 55 336 9 -13 21 15 -13 10 23 -13 24 26 -13 7 12 0.68 -127 0 0 -13 3 41 14 47 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306 34 -10 53 27 -10 42 50 -10 56 34 -10 39 44 0.68 -102 0 0 -10 49 4 14 50 44.0 40 305 35 -10 54 22 -10 43 45 -10 57 29 -10 40 39 0.68 -101 0 0 -10 50 30 14 50 51.4 39 305 36 -10 55 49 -10 45 11 -10 58 56 -10 42 5 0.68 -100 0 0 -10 52 28 14 50 58.7 38 304 37 -10 57 47 -10 47 9 -11 0 54 -10 44 3 0.68 - 99 0 0 -10 54 57 14 51 5.8 37 303 38 -11 0 16 -10 49 38 -11 3 23 -10 46 31 0.68 - 98 0 0 -10 57 57 14 51 12.8 36 303 39 -11 3 16 -10 52 38 -11 6 23 -10 49 31 0.68 - 97 0 0 -11 1 28 14 51 19.7 36 302 40 -11 6 47 -10 56 9 -11 9 54 -10 53 2 0.68 - 96 0 0 -11 5 30 14 51 26.4 35 302 41 -11 10 49 -11 0 11 -11 13 57 -10 57 4 0.68 - 95 0 0 -11 10 3 14 51 32.9 34 301 42 -11 15 22 -11 4 44 -11 18 30 -11 1 37 0.68 - 94 0 0 -11 15 6 14 51 39.3 33 301 43 -11 20 26 -11 9 47 -11 23 34 -11 6 40 0.68 - 93 0 0 -11 20 41 14 51 45.5 32 300 44 -11 26 1 -11 15 21 -11 29 8 -11 12 14 0.68 - 92 0 0 -11 26 45 14 51 51.6 31 300 45 -11 32 6 -11 21 26 -11 35 13 -11 18 18 0.68 - 91 0 0 -11 33 21 14 51 57.5 30 299 46 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-16 28 57 -16 43 14 -16 25 43 0.69 - 66 0 0 -16 52 30 14 53 26.6 6 291 69 -16 58 2 -16 46 58 -17 1 17 -16 43 44 0.70 - 65 0 0 -17 10 55 14 53 27.6 5 291 70 -17 16 28 -17 5 23 -17 19 43 -17 2 8 0.70 - 64 0 0 -17 29 43 14 53 28.4 4 291 71 -17 35 17 -17 24 10 -17 38 32 -17 20 55 0.72 - 63 0 0 -17 48 54 14 53 29.0 3 290 72 -17 54 28 -17 43 20 -17 57 44 -17 40 5 0.74 - 62 0 0 -18 8 26 14 53 29.5 2 290 72 -18 14 1 -18 2 52 -18 17 18 -17 59 36 0.78 - 61 0 0 -18 28 20 14 53 29.7 1 290 73 -18 33 56 -18 22 45 -18 37 13 -18 19 29 0.99 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 543-034150 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 46 41.7334 DE: +18 28 23.918 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 46 41.7334 DE: +18 28 23.918 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (31762) 1999 JB104 asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.50790 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 date of fit: 2023 Apr 27 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): 0.025", 0.002", 73.624° remarks: * orbital elements for (31762)1999 JB104 : Mean anomaly = 351.7052212489 deg Arg. of pericenter = 357.1041992182 deg Long. of node = 92.9133527881 deg Inclination = 18.3581780193 deg Eccentricity = 0.0838513203 Semimajor axis = 3.1015603475 AU Perihelion dist = 2.8414904173 AU Mag: H = 12.76, G = 0.15 Epoch of elements : MJD 60596.61523025 TDT (2024 Oct 13.6152) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Apr27,1.39,2024,10,13,14.765579,0.138473,-0.540966,6.375943,1.632521,-0.005664,0.000551,0.000000,0.000000 -142.1002,18.4480,-44.96,-8.11,False UCAC4 543-034150,6.77825924,18.4733105,12.22,11.95,11.80,0.0,0,,6.80247054,18.4479702,6.09,5.79,0,0,1 31762,1999 JB104,18.03,16.236,2.5079,0,0,1.571,5.73,,1.4,0 0,351.5942,2024,10,13,357.1042,92.9134,18.3582,0.08385,3.10156,2.84149,12.76,5.0,0.15 1.293,0.0253,0.0025,74,0.0026,Known errors,0.88,0,-1,-1 20241013_034150,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org