IOTA/IOTA-ES occultation update for (43812) 1991 RJ29 / TYC 5747-00202-1 event on 2024 Oct 20, 21:23 UT Visible from Summary ------- On 2024 Oct 20 UT, the 15.5095871466962 km diameter asteroid (43812) 1991 RJ29 will occult a 9.4 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.71 mag to 18.06 mag (the magnitude of the asteroid) for at most 1.140 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: 76 * date and approx. time of event: 2024 Oct 20, 21:16 - 2024 Oct 20, 21:30 * geocentric midpoint of event [JD]: 2460604.39120708 * magnitude of target star: 9.35 * magnitude drop [mag]: 8.71 * estimated maximum duration [s]: 1.140 * Moon: 83 % sunlit, 133° distance * Sun: 94° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.74 * 1 sigma uncertainty interval [seconds]: +/- 3.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.024, +/- 0.012) * 1 sigma uncertainty ellipse (major, minor, PA): (0.026", 0.004", 63°) * approx speed of asteroid's shadow [km/s]: 14.2815 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5747-00202-1 by 43812 1991 RJ29 on 2024 Oct 20 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 -147 0 0 -38 18 44 21 16 33.8 0 107 62 -38 23 47 -38 13 41 -38 31 20 -38 6 10 .... -146 0 0 -38 32 42 21 16 33.9 1 106 62 -38 37 44 -38 27 39 -38 45 16 -38 20 8 0.37 -145 0 0 -38 46 23 21 16 34.1 2 105 62 -38 51 26 -38 41 21 -38 58 57 -38 33 51 0.41 -144 0 0 -38 59 49 21 16 34.3 3 105 62 -39 4 51 -38 54 47 -39 12 22 -38 47 18 0.43 -143 0 0 -39 12 59 21 16 34.7 3 104 62 -39 18 0 -39 7 57 -39 25 30 -39 0 28 0.43 -142 0 0 -39 25 52 21 16 35.2 4 103 61 -39 30 53 -39 20 51 -39 38 23 -39 13 23 0.44 -141 0 0 -39 38 29 21 16 35.7 5 103 61 -39 43 30 -39 33 29 -39 50 59 -39 26 1 0.44 -140 0 0 -39 50 50 21 16 36.4 6 102 61 -39 55 50 -39 45 50 -40 3 18 -39 38 23 0.44 -139 0 0 -40 2 54 21 16 37.1 7 101 61 -40 7 54 -39 57 55 -40 15 22 -39 50 28 0.45 -138 0 0 -40 14 42 21 16 37.9 7 101 60 -40 19 42 -40 9 43 -40 27 9 -40 2 17 0.45 -137 0 0 -40 26 13 21 16 38.8 8 100 60 -40 31 12 -40 21 15 -40 38 39 -40 13 49 0.45 -136 0 0 -40 37 28 21 16 39.8 9 99 60 -40 42 27 -40 32 30 -40 49 53 -40 25 5 0.45 -135 0 0 -40 48 26 21 16 40.9 10 99 59 -40 53 24 -40 43 28 -41 0 49 -40 36 4 0.45 -134 0 0 -40 59 7 21 16 42.1 10 98 59 -41 4 5 -40 54 9 -41 11 30 -40 46 46 0.45 -133 0 0 -41 9 31 21 16 43.4 11 97 58 -41 14 29 -41 4 34 -41 21 53 -40 57 11 0.45 -132 0 0 -41 19 39 21 16 44.7 12 97 58 -41 24 36 -41 14 42 -41 31 59 -41 7 19 0.45 -131 0 0 -41 29 29 21 16 46.1 13 96 58 -41 34 26 -41 24 33 -41 41 49 -41 17 11 0.45 -130 0 0 -41 39 3 21 16 47.7 14 95 57 -41 43 59 -41 34 7 -41 51 22 -41 26 45 0.45 -129 0 0 -41 48 20 21 16 49.2 14 95 57 -41 53 16 -41 43 24 -42 0 37 -41 36 3 0.45 -128 0 0 -41 57 19 21 16 50.9 15 94 56 -42 2 15 -41 52 24 -42 9 36 -41 45 4 0.45 -127 0 0 -42 6 2 21 16 52.7 16 93 56 -42 10 57 -42 1 7 -42 18 18 -41 53 47 0.45 -126 0 0 -42 14 27 21 16 54.5 17 93 55 -42 19 22 -42 9 33 -42 26 43 -42 2 13 0.45 -125 0 0 -42 22 36 21 16 56.4 17 92 55 -42 27 31 -42 17 42 -42 34 50 -42 10 23 0.45 -124 0 0 -42 30 27 21 16 58.4 18 91 54 -42 35 22 -42 25 33 -42 42 41 -42 18 15 0.45 -123 0 0 -42 38 2 21 17 0.4 19 91 54 -42 42 56 -42 33 8 -42 50 14 -42 25 50 0.45 -122 0 0 -42 45 19 21 17 2.5 20 90 53 -42 50 12 -42 40 25 -42 57 31 -42 33 8 0.45 -121 0 0 -42 52 19 21 17 4.7 20 89 53 -42 57 12 -42 47 26 -43 4 30 -42 40 9 0.45 -120 0 0 -42 59 2 21 17 7.0 21 88 52 -43 3 55 -42 54 9 -43 11 12 -42 46 52 0.45 -119 0 0 -43 5 27 21 17 9.3 22 88 52 -43 10 20 -43 0 35 -43 17 37 -42 53 19 0.45 -118 0 0 -43 11 36 21 17 11.7 23 87 51 -43 16 29 -43 6 44 -43 23 45 -42 59 28 0.45 -117 0 0 -43 17 27 21 17 14.2 23 86 50 -43 22 20 -43 12 35 -43 29 36 -43 5 20 0.45 -116 0 0 -43 23 2 21 17 16.8 24 85 50 -43 27 54 -43 18 10 -43 35 9 -43 10 55 0.45 -115 0 0 -43 28 19 21 17 19.4 25 85 49 -43 33 10 -43 23 27 -43 40 26 -43 16 13 0.45 -114 0 0 -43 33 19 21 17 22.1 25 84 49 -43 38 10 -43 28 27 -43 45 25 -43 21 13 0.45 -113 0 0 -43 38 1 21 17 24.8 26 83 48 -43 42 53 -43 33 10 -43 50 7 -43 25 57 0.45 -112 0 0 -43 42 27 21 17 27.7 27 82 47 -43 47 18 -43 37 36 -43 54 32 -43 30 23 0.45 -111 0 0 -43 46 35 21 17 30.5 28 82 47 -43 51 26 -43 41 45 -43 58 40 -43 34 31 0.45 -110 0 0 -43 50 26 21 17 33.5 28 81 46 -43 55 17 -43 45 36 -44 2 31 -43 38 23 0.45 -109 0 0 -43 54 0 21 17 36.5 29 80 46 -43 58 51 -43 49 10 -44 6 4 -43 41 57 0.45 -108 0 0 -43 57 17 21 17 39.6 30 79 45 -44 2 7 -43 52 27 -44 9 21 -43 45 14 0.45 -107 0 0 -44 0 16 21 17 42.7 30 78 44 -44 5 7 -43 55 27 -44 12 20 -43 48 14 0.45 -106 0 0 -44 2 59 21 17 45.9 31 77 44 -44 7 49 -43 58 9 -44 15 2 -43 50 57 0.45 -105 0 0 -44 5 24 21 17 49.2 32 77 43 -44 10 14 -44 0 34 -44 17 27 -43 53 22 0.45 -104 0 0 -44 7 32 21 17 52.5 33 76 43 -44 12 22 -44 2 42 -44 19 34 -43 55 30 0.45 -103 0 0 -44 9 22 21 17 55.9 33 75 42 -44 14 12 -44 4 33 -44 21 25 -43 57 21 0.45 -102 0 0 -44 10 56 21 17 59.4 34 74 41 -44 15 45 -44 6 6 -44 22 58 -43 58 55 0.45 -101 0 0 -44 12 12 21 18 2.9 35 73 41 -44 17 1 -44 7 23 -44 24 14 -44 0 11 0.45 -100 0 0 -44 13 11 21 18 6.5 35 72 40 -44 18 0 -44 8 22 -44 25 12 -44 1 10 0.45 - 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73 0 0 -42 50 4 21 20 5.5 53 44 21 -42 54 57 -42 45 11 -43 2 14 -42 37 55 0.45 - 72 0 0 -42 42 53 21 20 10.7 54 43 21 -42 47 46 -42 38 0 -42 55 4 -42 30 43 0.45 - 71 0 0 -42 35 24 21 20 16.0 54 42 20 -42 40 18 -42 30 31 -42 47 36 -42 23 14 0.45 - 70 0 0 -42 27 37 21 20 21.3 55 40 19 -42 32 31 -42 22 44 -42 39 50 -42 15 26 0.45 - 69 0 0 -42 19 33 21 20 26.7 55 39 18 -42 24 27 -42 14 39 -42 31 46 -42 7 21 0.45 - 68 0 0 -42 11 10 21 20 32.2 56 37 18 -42 16 5 -42 6 16 -42 23 24 -41 58 58 0.45 - 67 0 0 -42 2 30 21 20 37.7 56 36 17 -42 7 25 -41 57 36 -42 14 45 -41 50 16 0.45 - 66 0 0 -41 53 32 21 20 43.2 57 34 16 -41 58 27 -41 48 37 -42 5 48 -41 41 17 0.45 - 65 0 0 -41 44 16 21 20 48.9 58 33 15 -41 49 12 -41 39 21 -41 56 33 -41 32 0 0.45 - 64 0 0 -41 34 42 21 20 54.5 58 31 14 -41 39 38 -41 29 46 -41 47 0 -41 22 26 0.45 - 63 0 0 -41 24 50 21 21 0.3 59 30 14 -41 29 47 -41 19 54 -41 37 9 -41 12 33 0.45 - 62 0 0 -41 14 41 21 21 6.0 59 28 13 -41 19 37 -41 9 44 -41 27 0 -41 2 22 0.45 - 61 0 0 -41 4 13 21 21 11.9 60 26 12 -41 9 10 -40 59 16 -41 16 34 -40 51 54 0.45 - 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10 0 0 -26 20 20 21 26 53.8 51 282 -33 -26 25 34 -26 15 6 -26 33 24 -26 7 18 0.46 - 9 0 0 -25 58 8 21 27 0.3 50 281 -34 -26 3 22 -25 52 53 -26 11 11 -25 45 5 0.46 - 8 0 0 -25 35 51 21 27 6.8 49 280 -35 -25 41 5 -25 30 37 -25 48 55 -25 22 49 0.46 - 7 0 0 -25 13 32 21 27 13.2 48 279 -36 -25 18 46 -25 8 17 -25 26 35 -25 0 29 0.46 - 6 0 0 -24 51 9 21 27 19.6 47 278 -37 -24 56 24 -24 45 55 -25 4 13 -24 38 7 0.46 - 5 0 0 -24 28 45 21 27 25.9 47 277 -38 -24 33 59 -24 23 31 -24 41 48 -24 15 43 0.46 - 4 0 0 -24 6 19 21 27 32.1 46 276 -39 -24 11 33 -24 1 5 -24 19 23 -23 53 17 0.46 - 3 0 0 -23 43 53 21 27 38.2 45 275 -40 -23 49 7 -23 38 39 -23 56 56 -23 30 51 0.47 - 2 0 0 -23 21 26 21 27 44.3 44 274 -41 -23 26 40 -23 16 12 -23 34 29 -23 8 24 0.47 - 1 0 0 -22 58 59 21 27 50.3 43 273 -42 -23 4 13 -22 53 46 -23 12 2 -22 45 58 0.47 0 0 0 -22 36 34 21 27 56.1 42 273 -43 -22 41 47 -22 31 20 -22 49 36 -22 23 33 0.47 1 0 0 -22 14 9 21 28 1.9 41 272 -44 -22 19 23 -22 8 56 -22 27 11 -22 1 9 0.47 2 0 0 -21 51 47 21 28 7.6 40 271 -45 -21 57 1 -21 46 34 -22 4 49 -21 38 47 0.47 3 0 0 -21 29 28 21 28 13.2 39 270 -46 -21 34 41 -21 24 15 -21 42 29 -21 16 28 0.47 4 0 0 -21 7 12 21 28 18.7 38 270 -47 -21 12 25 -21 1 59 -21 20 12 -20 54 13 0.47 5 0 0 -20 44 59 21 28 24.1 37 269 -48 -20 50 12 -20 39 47 -20 57 59 -20 32 1 0.47 6 0 0 -20 22 52 21 28 29.3 36 269 -48 -20 28 4 -20 17 39 -20 35 51 -20 9 54 0.47 7 0 0 -20 0 49 21 28 34.5 35 268 -49 -20 6 1 -19 55 37 -20 13 48 -19 47 51 0.47 8 0 0 -19 38 52 21 28 39.5 34 267 -50 -19 44 4 -19 33 40 -19 51 50 -19 25 55 0.47 9 0 0 -19 17 0 21 28 44.4 33 267 -51 -19 22 12 -19 11 49 -19 29 58 -19 4 4 0.47 10 0 0 -18 55 16 21 28 49.2 32 266 -52 -19 0 28 -18 50 5 -19 8 13 -18 42 21 0.47 11 0 0 -18 33 39 21 28 53.9 31 266 -53 -18 38 50 -18 28 28 -18 46 35 -18 20 44 0.47 12 0 0 -18 12 10 21 28 58.4 30 265 -54 -18 17 21 -18 6 59 -18 25 5 -17 59 16 0.47 13 0 0 -17 50 49 21 29 2.8 29 265 -55 -17 56 0 -17 45 39 -18 3 44 -17 37 56 0.47 14 0 0 -17 29 37 21 29 7.1 28 264 -56 -17 34 48 -17 24 27 -17 42 31 -17 16 45 0.47 15 0 0 -17 8 35 21 29 11.3 27 264 -57 -17 13 45 -17 3 25 -17 21 28 -16 55 43 0.47 16 0 0 -16 47 42 21 29 15.3 26 264 -57 -16 52 52 -16 42 33 -17 0 34 -16 34 52 0.47 17 0 0 -16 27 0 21 29 19.1 25 263 -58 -16 32 10 -16 21 51 -16 39 52 -16 14 11 0.47 18 0 0 -16 6 30 21 29 22.9 24 263 -59 -16 11 38 -16 1 21 -16 19 20 -15 53 41 0.48 19 0 0 -15 46 10 21 29 26.5 23 262 -60 -15 51 19 -15 41 2 -15 58 59 -15 33 22 0.48 20 0 0 -15 26 3 21 29 29.9 22 262 -61 -15 31 11 -15 20 55 -15 38 51 -15 13 16 0.48 21 0 0 -15 6 7 21 29 33.2 21 262 -61 -15 11 15 -15 1 0 -15 18 55 -14 53 22 0.48 22 0 0 -14 46 25 21 29 36.4 20 261 -62 -14 51 33 -14 41 18 -14 59 12 -14 33 40 0.48 23 0 0 -14 26 56 21 29 39.4 19 261 -63 -14 32 3 -14 21 50 -14 39 42 -14 14 12 0.48 24 0 0 -14 7 41 21 29 42.2 18 261 -63 -14 12 48 -14 2 35 -14 20 25 -13 54 58 0.48 25 0 0 -13 48 40 21 29 44.9 17 260 -64 -13 53 46 -13 43 34 -14 1 23 -13 35 58 0.48 26 0 0 -13 29 54 21 29 47.5 16 260 -65 -13 34 59 -13 24 48 -13 42 36 -13 17 13 0.48 27 0 0 -13 11 22 21 29 49.9 15 260 -65 -13 16 28 -13 6 17 -13 24 4 -12 58 42 0.48 28 0 0 -12 53 6 21 29 52.2 14 260 -66 -12 58 11 -12 48 2 -13 5 46 -12 40 27 0.49 29 0 0 -12 35 6 21 29 54.2 13 259 -66 -12 40 10 -12 30 2 -12 47 45 -12 22 28 0.49 30 0 0 -12 17 22 21 29 56.2 12 259 -67 -12 22 26 -12 12 18 -12 30 0 -12 4 45 0.49 31 0 0 -11 59 54 21 29 58.0 11 259 -67 -12 4 58 -11 54 51 -12 12 31 -11 47 18 0.49 32 0 0 -11 42 43 21 29 59.6 10 259 -68 -11 47 46 -11 37 40 -11 55 19 -11 30 8 0.49 33 0 0 -11 25 49 21 30 1.1 9 258 -68 -11 30 52 -11 20 47 -11 38 24 -11 13 16 0.50 34 0 0 -11 9 13 21 30 2.4 8 258 -68 -11 14 15 -11 4 11 -11 21 47 -10 56 40 0.50 35 0 0 -10 52 54 21 30 3.6 7 258 -68 -10 57 56 -10 47 52 -11 5 27 -10 40 23 0.51 36 0 0 -10 36 54 21 30 4.6 6 258 -69 -10 41 55 -10 31 52 -10 49 25 -10 24 23 0.52 37 0 0 -10 21 11 21 30 5.4 5 258 -69 -10 26 12 -10 16 10 -10 33 42 -10 8 42 0.53 38 0 0 -10 5 48 21 30 6.1 4 258 -69 -10 10 48 -10 0 47 -10 18 17 - 9 53 19 0.54 39 0 0 - 9 50 43 21 30 6.7 3 257 -69 - 9 55 43 - 9 45 43 -10 3 11 - 9 38 15 0.57 40 0 0 - 9 35 57 21 30 7.1 2 257 -69 - 9 40 57 - 9 30 57 - 9 48 24 - 9 23 31 0.62 41 0 0 - 9 21 30 21 30 7.3 1 257 -69 - 9 26 30 - 9 16 31 - 9 33 57 - 9 9 5 0.78 42 0 0 - 9 7 23 21 30 7.4 0 257 -68 - 9 12 22 .. .. .. - 9 19 49 .. .. .. 30.85 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 5747-00202-1 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 07 40.2778 DE: -13 03 51.472 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 07 40.2777 DE: -13 03 51.472 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.4 * B mag [mag]: 10.6 * Diameter [mas]: 0.40 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (43812) 1991 RJ29 asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.54530 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#44 date of fit: 2023 Apr 25 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): 0.026", 0.004", 63.076° remarks: * orbital elements for (43812)1991 RJ29 : Mean anomaly = 313.3511940710 deg Arg. of pericenter = 97.9395483849 deg Long. of node = 292.1811655458 deg Inclination = 12.5460741529 deg Eccentricity = 0.2081853063 Semimajor axis = 3.1516046525 AU Perihelion dist = 2.4954868727 AU Mag: H = 12.78, G = 0.15 Epoch of elements : MJD 60603.89120688 TDT (2024 Oct 20.8912) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#442023Apr25,1.14,2024,10,20,21.388970,0.106121,-0.397198,7.787004,2.083254,0.005643,0.001184,0.000000,0.000000 -48.3972,-12.9926,-144.67,-10.76,False TYC 5747-00202-1,20.12785496,-13.0642977,10.62,9.35,8.66,0.4,0,,20.15082216,-12.9925555,8.71,8.95,0,0,0 43812,1991 RJ29,18.06,16.248,2.5453,0,0,1.842,7.20,,1.6,0 0,313.1942,2024,10,20,97.9395,292.1812,12.5461,0.20819,3.15160,2.49549,12.78,5.0,0.15 1.746,0.0263,0.0037,63,0.0065,Known errors,1.07,0,-1,-1 20241020_0202-1,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:34 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org