IOTA/IOTA-ES occultation update for (2215) Sichuan / TYC 6384-00277-1 event on 2024 Dec 26, 18:34 UT Visible from Summary ------- On 2024 Dec 26 UT, the 12.852 km diameter asteroid (2215) Sichuan will occult a 11.7 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.16 mag to 16.83 mag (the magnitude of the asteroid) for at most 0.350 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 26, 18:31 - 2024 Dec 26, 18:37 * geocentric midpoint of event [JD]: 2460671.27417221 * magnitude of target star: 11.68 * magnitude drop [mag]: 5.16 * estimated maximum duration [s]: 0.350 * Moon: 17 % sunlit, 102° distance * Sun: 55° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 14 * 1 sigma uncertainty interval [path widths]: +/- 0.26 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.001", 71°) * approx speed of asteroid's shadow [km/s]: 36.4745 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6384-00277-1 by 2215 Sichuan on 2024 Dec 26 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 -41 52 20 18 32 2.4 0 117 45 -41 56 27 -41 48 14 -41 58 32 -41 46 8 .... -146 0 0 -42 14 53 18 32 2.4 1 116 46 -42 18 59 -42 10 48 -42 21 4 -42 8 43 0.34 -145 0 0 -42 36 56 18 32 2.5 2 115 47 -42 41 0 -42 32 51 -42 43 5 -42 30 46 0.33 -144 0 0 -42 58 27 18 32 2.6 3 115 47 -43 2 31 -42 54 23 -43 4 35 -42 52 19 0.33 -143 0 0 -43 19 28 18 32 2.8 4 114 48 -43 23 31 -43 15 25 -43 25 35 -43 13 21 0.33 -142 0 0 -43 39 58 18 32 3.0 5 113 48 -43 44 0 -43 35 56 -43 46 3 -43 33 52 0.33 -141 0 0 -43 59 57 18 32 3.2 5 113 49 -44 3 58 -43 55 56 -44 6 1 -43 53 53 0.33 -140 0 0 -44 19 26 18 32 3.5 6 112 50 -44 23 27 -44 15 26 -44 25 29 -44 13 23 0.33 -139 0 0 -44 38 25 18 32 3.7 7 111 50 -44 42 25 -44 34 26 -44 44 27 -44 32 24 0.33 -138 0 0 -44 56 54 18 32 4.1 8 111 51 -45 0 53 -44 52 56 -45 2 55 -44 50 54 0.33 -137 0 0 -45 14 54 18 32 4.4 8 110 51 -45 18 52 -45 10 56 -45 20 53 -45 8 55 0.33 -136 0 0 -45 32 24 18 32 4.8 9 109 52 -45 36 21 -45 28 27 -45 38 22 -45 26 26 0.33 -135 0 0 -45 49 25 18 32 5.2 10 108 52 -45 53 21 -45 45 29 -45 55 22 -45 43 28 0.33 -134 0 0 -46 5 57 18 32 5.6 11 108 53 -46 9 52 -46 2 1 -46 11 53 -46 0 1 0.33 -133 0 0 -46 22 0 18 32 6.1 11 107 53 -46 25 55 -46 18 5 -46 27 55 -46 16 6 0.33 -132 0 0 -46 37 35 18 32 6.6 12 106 54 -46 41 29 -46 33 41 -46 43 28 -46 31 41 0.33 -131 0 0 -46 52 41 18 32 7.1 13 106 54 -46 56 34 -46 48 48 -46 58 33 -46 46 49 0.33 -130 0 0 -47 7 19 18 32 7.6 14 105 55 -47 11 12 -47 3 27 -47 13 10 -47 1 28 0.33 -129 0 0 -47 21 30 18 32 8.2 14 104 55 -47 25 21 -47 17 38 -47 27 20 -47 15 40 0.33 -128 0 0 -47 35 13 18 32 8.8 15 103 56 -47 39 4 -47 31 22 -47 41 2 -47 29 24 0.33 -127 0 0 -47 48 28 18 32 9.4 16 103 56 -47 52 18 -47 44 38 -47 54 16 -47 42 40 0.33 -126 0 0 -48 1 17 18 32 10.0 16 102 57 -48 5 6 -47 57 27 -48 7 4 -47 55 30 0.33 -125 0 0 -48 13 38 18 32 10.7 17 101 57 -48 17 27 -48 9 49 -48 19 24 -48 7 52 0.33 -124 0 0 -48 25 33 18 32 11.4 18 100 57 -48 29 22 -48 21 45 -48 31 18 -48 19 48 0.33 -123 0 0 -48 37 2 18 32 12.0 19 99 58 -48 40 50 -48 33 14 -48 42 46 -48 31 18 0.33 -122 0 0 -48 48 4 18 32 12.8 19 99 58 -48 51 52 -48 44 17 -48 53 48 -48 42 21 0.33 -121 0 0 -48 58 41 18 32 13.5 20 98 58 -49 2 27 -48 54 54 -49 4 23 -48 52 59 0.33 -120 0 0 -49 8 52 18 32 14.3 21 97 59 -49 12 38 -49 5 6 -49 14 33 -49 3 10 0.33 -119 0 0 -49 18 37 18 32 15.0 21 96 59 -49 22 22 -49 14 51 -49 24 18 -49 12 56 0.33 -118 0 0 -49 27 57 18 32 15.8 22 96 59 -49 31 42 -49 24 12 -49 33 37 -49 22 17 0.33 -117 0 0 -49 36 51 18 32 16.7 23 95 60 -49 40 36 -49 33 7 -49 42 31 -49 31 12 0.33 -116 0 0 -49 45 21 18 32 17.5 23 94 60 -49 49 5 -49 41 37 -49 51 0 -49 39 43 0.33 -115 0 0 -49 53 26 18 32 18.3 24 93 60 -49 57 10 -49 49 43 -49 59 4 -49 47 49 0.33 -114 0 0 -50 1 7 18 32 19.2 25 92 60 -50 4 50 -49 57 24 -50 6 44 -49 55 30 0.33 -113 0 0 -50 8 23 18 32 20.1 25 91 61 -50 12 5 -50 4 40 -50 13 59 -50 2 46 0.33 -112 0 0 -50 15 14 18 32 21.0 26 91 61 -50 18 57 -50 11 32 -50 20 50 -50 9 39 0.33 -111 0 0 -50 21 42 18 32 21.9 26 90 61 -50 25 24 -50 18 0 -50 27 17 -50 16 7 0.33 -110 0 0 -50 27 46 18 32 22.9 27 89 61 -50 31 27 -50 24 4 -50 33 21 -50 22 11 0.33 -109 0 0 -50 33 26 18 32 23.8 28 88 61 -50 37 7 -50 29 44 -50 39 0 -50 27 51 0.33 -108 0 0 -50 38 42 18 32 24.8 28 87 62 -50 42 23 -50 35 1 -50 44 16 -50 33 8 0.33 -107 0 0 -50 43 34 18 32 25.8 29 87 62 -50 47 15 -50 39 54 -50 49 8 -50 38 1 0.33 -106 0 0 -50 48 3 18 32 26.8 30 86 62 -50 51 44 -50 44 23 -50 53 36 -50 42 30 0.32 -105 0 0 -50 52 9 18 32 27.8 30 85 62 -50 55 49 -50 48 29 -50 57 42 -50 46 36 0.32 -104 0 0 -50 55 51 18 32 28.9 31 84 62 -50 59 31 -50 52 12 -51 1 24 -50 50 19 0.32 -103 0 0 -50 59 11 18 32 29.9 32 83 62 -51 2 50 -50 55 31 -51 4 43 -50 53 39 0.32 -102 0 0 -51 2 7 18 32 31.0 32 82 62 -51 5 46 -50 58 27 -51 7 39 -50 56 35 0.32 -101 0 0 -51 4 40 18 32 32.1 33 81 62 -51 8 19 -51 1 1 -51 10 11 -50 59 9 0.32 -100 0 0 -51 6 50 18 32 33.2 33 81 62 -51 10 29 -51 3 11 -51 12 21 -51 1 19 0.32 - 99 0 0 -51 8 37 18 32 34.4 34 80 62 -51 12 16 -51 4 58 -51 14 8 -51 3 6 0.32 - 98 0 0 -51 10 1 18 32 35.5 35 79 62 -51 13 40 -51 6 22 -51 15 32 -51 4 31 0.32 - 97 0 0 -51 11 3 18 32 36.7 35 78 62 -51 14 42 -51 7 24 -51 16 34 -51 5 32 0.32 - 96 0 0 -51 11 41 18 32 37.8 36 77 62 -51 15 20 -51 8 2 -51 17 12 -51 6 11 0.32 - 95 0 0 -51 11 57 18 32 39.0 36 76 62 -51 15 36 -51 8 18 -51 17 28 -51 6 26 0.32 - 94 0 0 -51 11 50 18 32 40.3 37 75 62 -51 15 29 -51 8 11 -51 17 21 -51 6 19 0.32 - 93 0 0 -51 11 20 18 32 41.5 38 74 62 -51 14 59 -51 7 41 -51 16 51 -51 5 49 0.32 - 92 0 0 -51 10 27 18 32 42.7 38 73 62 -51 14 6 -51 6 48 -51 15 58 -51 4 56 0.32 - 91 0 0 -51 9 11 18 32 44.0 39 73 62 -51 12 50 -51 5 32 -51 14 42 -51 3 40 0.32 - 90 0 0 -51 7 32 18 32 45.3 40 72 61 -51 11 12 -51 3 53 -51 13 4 -51 2 1 0.32 - 89 0 0 -51 5 31 18 32 46.6 40 71 61 -51 9 10 -51 1 51 -51 11 2 -50 59 59 0.32 - 88 0 0 -51 3 6 18 32 47.9 41 70 61 -51 6 45 -50 59 27 -51 8 38 -50 57 35 0.32 - 87 0 0 -51 0 18 18 32 49.3 41 69 61 -51 3 58 -50 56 39 -51 5 50 -50 54 46 0.32 - 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9 0 0 -23 57 13 18 35 52.6 61 272 9 -24 1 42 -23 52 44 -24 4 0 -23 50 26 0.33 - 8 0 0 -23 18 11 18 35 55.8 60 270 8 -23 22 40 -23 13 41 -23 24 58 -23 11 24 0.33 - 7 0 0 -22 38 54 18 35 58.9 59 269 7 -22 43 24 -22 34 25 -22 45 42 -22 32 7 0.33 - 6 0 0 -21 59 25 18 36 2.1 58 267 6 -22 3 55 -21 54 56 -22 6 13 -21 52 38 0.33 - 5 0 0 -21 19 45 18 36 5.2 57 266 5 -21 24 15 -21 15 16 -21 26 32 -21 12 58 0.33 - 4 0 0 -20 39 55 18 36 8.3 56 265 4 -20 44 25 -20 35 26 -20 46 42 -20 33 8 0.33 - 3 0 0 -19 59 56 18 36 11.4 55 263 3 -20 4 26 -19 55 27 -20 6 44 -19 53 9 0.33 - 2 0 0 -19 19 51 18 36 14.5 54 262 2 -19 24 20 -19 15 21 -19 26 38 -19 13 4 0.33 - 1 0 0 -18 39 40 18 36 17.5 53 261 0 -18 44 9 -18 35 11 -18 46 26 -18 32 53 0.33 0 0 0 -17 59 24 18 36 20.5 52 260 -1 -18 3 53 -17 54 56 -18 6 11 -17 52 38 0.33 1 0 0 -17 19 7 18 36 23.4 51 259 -2 -17 23 35 -17 14 38 -17 25 53 -17 12 21 0.33 2 0 0 -16 38 48 18 36 26.4 50 258 -3 -16 43 16 -16 34 20 -16 45 34 -16 32 3 0.33 3 0 0 -15 58 30 18 36 29.3 49 258 -4 -16 2 58 -15 54 2 -16 5 15 -15 51 45 0.34 4 0 0 -15 18 13 18 36 32.1 48 257 -5 -15 22 41 -15 13 46 -15 24 58 -15 11 29 0.34 5 0 0 -14 38 1 18 36 34.9 47 256 -7 -14 42 28 -14 33 33 -14 44 45 -14 31 17 0.34 6 0 0 -13 57 53 18 36 37.7 46 255 -8 -14 2 20 -13 53 26 -14 4 36 -13 51 10 0.34 7 0 0 -13 17 51 18 36 40.4 45 255 -9 -13 22 18 -13 13 25 -13 24 34 -13 11 9 0.34 8 0 0 -12 37 58 18 36 43.0 44 254 -10 -12 42 24 -12 33 32 -12 44 39 -12 31 16 0.34 9 0 0 -11 58 13 18 36 45.6 42 254 -11 -12 2 39 -11 53 48 -12 4 54 -11 51 33 0.34 10 0 0 -11 18 40 18 36 48.2 41 253 -12 -11 23 5 -11 14 15 -11 25 20 -11 12 0 0.34 11 0 0 -10 39 18 18 36 50.6 40 253 -14 -10 43 43 -10 34 54 -10 45 58 -10 32 39 0.34 12 0 0 -10 0 11 18 36 53.1 39 252 -15 -10 4 34 - 9 55 47 -10 6 49 - 9 53 33 0.34 13 0 0 - 9 21 18 18 36 55.4 38 252 -16 - 9 25 40 - 9 16 55 - 9 27 55 - 9 14 41 0.34 14 0 0 - 8 42 41 18 36 57.7 37 251 -17 - 8 47 3 - 8 38 19 - 8 49 17 - 8 36 5 0.34 15 0 0 - 8 4 21 18 37 0.0 36 251 -18 - 8 8 43 - 8 0 0 - 8 10 56 - 7 57 46 0.34 16 0 0 - 7 26 20 18 37 2.2 34 251 -20 - 7 30 41 - 7 22 0 - 7 32 54 - 7 19 46 0.34 17 0 0 - 6 48 39 18 37 4.3 33 251 -21 - 6 52 59 - 6 44 19 - 6 55 12 - 6 42 6 0.34 18 0 0 - 6 11 19 18 37 6.3 32 250 -22 - 6 15 38 - 6 7 0 - 6 17 51 - 6 4 47 0.34 19 0 0 - 5 34 21 18 37 8.3 31 250 -23 - 5 38 39 - 5 30 2 - 5 40 51 - 5 27 50 0.34 20 0 0 - 4 57 46 18 37 10.2 30 250 -24 - 5 2 3 - 4 53 28 - 5 4 15 - 4 51 17 0.34 21 0 0 - 4 21 34 18 37 12.0 29 250 -25 - 4 25 51 - 4 17 18 - 4 28 2 - 4 15 7 0.34 22 0 0 - 3 45 48 18 37 13.8 28 249 -27 - 3 50 4 - 3 41 33 - 3 52 15 - 3 39 22 0.34 23 0 0 - 3 10 28 18 37 15.5 26 249 -28 - 3 14 43 - 3 6 13 - 3 16 54 - 3 4 3 0.34 24 0 0 - 2 35 35 18 37 17.1 25 249 -29 - 2 39 49 - 2 31 21 - 2 41 59 - 2 29 11 0.34 25 0 0 - 2 1 9 18 37 18.6 24 249 -30 - 2 5 23 - 1 56 56 - 2 7 32 - 1 54 47 0.35 26 0 0 - 1 27 12 18 37 20.1 23 249 -31 - 1 31 25 - 1 23 0 - 1 33 34 - 1 20 51 0.35 27 0 0 - 0 53 44 18 37 21.5 22 249 -32 - 0 57 56 - 0 49 32 - 1 0 4 - 0 47 24 0.35 28 0 0 - 0 20 46 18 37 22.8 21 249 -33 - 0 24 56 - 0 16 35 - 0 27 4 - 0 14 27 0.35 29 0 0 0 11 42 18 37 24.1 20 249 -35 0 7 32 0 15 52 0 5 25 0 17 59 0.35 30 0 0 0 43 39 18 37 25.3 18 249 -36 0 39 30 0 47 47 0 37 23 0 49 55 0.35 31 0 0 1 15 4 18 37 26.4 17 249 -37 1 10 56 1 19 12 1 8 49 1 21 18 0.35 32 0 0 1 45 56 18 37 27.4 16 249 -38 1 41 49 1 50 3 1 39 43 1 52 10 0.35 33 0 0 2 16 17 18 37 28.4 15 249 -39 2 12 10 2 20 23 2 10 4 2 22 28 0.35 34 0 0 2 46 4 18 37 29.3 14 249 -40 2 41 58 2 50 9 2 39 53 2 52 14 0.35 35 0 0 3 15 17 18 37 30.1 13 249 -41 3 11 12 3 19 21 3 9 8 3 21 26 0.36 36 0 0 3 43 56 18 37 30.9 12 249 -42 3 39 53 3 48 0 3 37 48 3 50 4 0.36 37 0 0 4 12 2 18 37 31.6 11 249 -44 4 7 59 4 16 4 4 5 55 4 18 8 0.36 38 0 0 4 39 33 18 37 32.2 10 249 -45 4 35 31 4 43 34 4 33 27 4 45 38 0.36 39 0 0 5 6 29 18 37 32.7 8 249 -46 5 2 28 5 10 29 5 0 24 5 12 32 0.37 40 0 0 5 32 49 18 37 33.2 7 249 -47 5 28 49 5 36 49 5 26 47 5 38 52 0.37 41 0 0 5 58 35 18 37 33.6 6 249 -48 5 54 36 6 2 34 5 52 33 6 4 36 0.38 42 0 0 6 23 45 18 37 34.0 5 249 -49 6 19 47 6 27 43 6 17 45 6 29 45 0.39 43 0 0 6 48 20 18 37 34.2 4 249 -50 6 44 22 6 52 17 6 42 20 6 54 18 0.40 44 0 0 7 12 18 18 37 34.4 3 249 -51 7 8 21 7 16 15 7 6 20 7 18 16 0.43 45 0 0 7 35 41 18 37 34.6 2 250 -52 7 31 45 7 39 37 7 29 44 7 41 37 0.48 46 0 0 7 58 28 18 37 34.7 1 250 -53 7 54 33 8 2 23 7 52 32 8 4 23 0.66 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: TYC 6384-00277-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 22 18 39.5596 DE: -20 05 49.392 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 22 18 39.5593 DE: -20 05 49.393 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.7 * B mag [mag]: 12.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2215) Sichuan asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.007 distance from Earth [AU]: 2.68060 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): 0.011", 0.001", 70.695° remarks: * orbital elements for (2215)Sichuan : Mean anomaly = 327.2055036544 deg Arg. of pericenter = 333.6456901719 deg Long. of node = 71.0043589945 deg Inclination = 10.7712591894 deg Eccentricity = 0.2618679388 Semimajor axis = 2.7922882990 AU Perihelion dist = 2.0610775176 AU Mag: H = 11.90, G = 0.15 Epoch of elements : MJD 60670.77417208 TDT (2024 Dec 26.7742) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,0.35,2024,12,26,18.580133,0.139667,-0.275904,18.379355,9.275412,0.004526,0.001217,-0.000001,-0.000001 -39.4465,-19.9741,-98.47,-23.32,False TYC 6384-00277-1,22.31098883,-20.0970532,12.06,11.68,11.47,0.0,0,,22.33360513,-19.9741341,5.16,4.92,0,0,0 2215,Sichuan,16.83,12.852,2.6806,0,0,4.277,30.44,,0.8,0 0,327.0420,2024,12,26,333.6457,71.0044,10.7713,0.26187,2.79229,2.06108,11.90,5.0,0.15 1.255,0.0113,0.0008,71,0.0017,Known errors,1.35,0,-1,-1 20241226_0277-1,60140.76 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org