IOTA/IOTA-ES occultation update for (313) Chaldaea / TYC 4914-00733-1 event on 2024 Nov 30, 16:10 UT Visible from Summary ------- On 2024 Nov 30 UT, the 93.5636743163033 km diameter asteroid (313) Chaldaea will occult a 9.3 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.91 mag to 13.14 mag (the magnitude of the asteroid) for at most 3.990 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: 100 * date and approx. time of event: 2024 Nov 30, 16:07 - 2024 Nov 30, 16:13 * geocentric midpoint of event [JD]: 2460645.17381063 * magnitude of target star: 9.26 * magnitude drop [mag]: 3.91 * estimated maximum duration [s]: 3.990 * Moon: 1 % sunlit, 74° distance * Sun: 82° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 140 * 1 sigma uncertainty interval [path widths]: +/- 0.06 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.001", 98°) * approx speed of asteroid's shadow [km/s]: 23.5117 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4914-00733-1 by 313 Chaldaea on 2024 Nov 30 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 122 0 0 .. .. .... .. .. .. .. .. .. -28 23 2 .. .. .. -28 27 39 .. .. .. .... 123 0 0 -27 47 25 16 7 16.4 1 92 -40 -28 25 47 -27 9 31 -28 30 24 -27 5 1 .... 124 0 0 -27 50 39 16 7 16.6 2 92 -40 -28 29 2 -27 12 43 -28 33 40 -27 8 13 0.85 125 0 0 -27 54 21 16 7 16.8 3 91 -40 -28 32 47 -27 16 24 -28 37 24 -27 11 54 0.94 126 0 0 -27 58 34 16 7 17.1 4 91 -39 -28 37 1 -27 20 35 -28 41 39 -27 16 4 0.98 127 0 0 -28 3 15 16 7 17.6 4 90 -39 -28 41 45 -27 25 14 -28 46 23 -27 20 43 1.01 128 0 0 -28 8 26 16 7 18.1 5 90 -39 -28 46 58 -27 30 23 -28 51 36 -27 25 51 1.03 129 0 0 -28 14 6 16 7 18.7 6 89 -38 -28 52 40 -27 36 0 -28 57 19 -27 31 29 1.04 130 0 0 -28 20 15 16 7 19.5 7 89 -38 -28 58 52 -27 42 7 -29 3 31 -27 37 35 1.05 131 0 0 -28 26 53 16 7 20.3 8 88 -38 -29 5 33 -27 48 42 -29 10 12 -27 44 10 1.06 132 0 0 -28 34 0 16 7 21.2 9 88 -37 -29 12 43 -27 55 46 -29 17 23 -27 51 14 1.07 133 0 0 -28 41 36 16 7 22.2 10 87 -37 -29 20 22 -28 3 19 -29 25 2 -27 58 46 1.07 134 0 0 -28 49 41 16 7 23.3 11 87 -36 -29 28 31 -28 11 20 -29 33 11 -28 6 47 1.08 135 0 0 -28 58 14 16 7 24.6 11 86 -36 -29 37 8 -28 19 50 -29 41 49 -28 15 17 1.08 136 0 0 -29 7 16 16 7 25.9 12 86 -35 -29 46 14 -28 28 49 -29 50 55 -28 24 14 1.08 137 0 0 -29 16 47 16 7 27.2 13 85 -35 -29 55 48 -28 38 15 -30 0 30 -28 33 41 1.09 138 0 0 -29 26 45 16 7 28.7 14 85 -34 -30 5 51 -28 48 10 -30 10 33 -28 43 35 1.09 139 0 0 -29 37 12 16 7 30.3 15 84 -34 -30 16 22 -28 58 32 -30 21 5 -28 53 57 1.09 140 0 0 -29 48 7 16 7 32.0 16 84 -33 -30 27 21 -29 9 23 -30 32 5 -29 4 47 1.09 141 0 0 -29 59 29 16 7 33.8 17 83 -33 -30 38 48 -29 20 40 -30 43 32 -29 16 4 1.10 142 0 0 -30 11 19 16 7 35.6 17 82 -32 -30 50 43 -29 32 26 -30 55 28 -29 27 49 1.10 143 0 0 -30 23 36 16 7 37.6 18 82 -32 -31 3 5 -29 44 38 -31 7 51 -29 40 0 1.10 144 0 0 -30 36 21 16 7 39.6 19 81 -31 -31 15 55 -29 57 17 -31 20 41 -29 52 39 1.10 145 0 0 -30 49 32 16 7 41.7 20 81 -30 -31 29 12 -30 10 24 -31 33 58 -30 5 45 1.10 146 0 0 -31 3 10 16 7 43.9 21 80 -30 -31 42 55 -30 23 56 -31 47 42 -30 19 17 1.10 147 0 0 -31 17 14 16 7 46.2 22 79 -29 -31 57 5 -30 37 55 -32 1 53 -30 33 15 1.10 148 0 0 -31 31 44 16 7 48.6 22 79 -28 -32 11 41 -30 52 19 -32 16 30 -30 47 39 1.10 149 0 0 -31 46 40 16 7 51.0 23 78 -28 -32 26 43 -31 7 9 -32 31 32 -31 2 28 1.11 150 0 0 -32 2 1 16 7 53.6 24 77 -27 -32 42 10 -31 22 25 -32 47 0 -31 17 43 1.11 151 0 0 -32 17 48 16 7 56.2 25 76 -26 -32 58 3 -31 38 5 -33 2 54 -31 33 23 1.11 152 0 0 -32 33 59 16 7 58.9 25 76 -25 -33 14 20 -31 54 10 -33 19 12 -31 49 27 1.11 153 0 0 -32 50 35 16 8 1.7 26 75 -25 -33 31 3 -32 10 40 -33 35 55 -32 5 56 1.11 154 0 0 -33 7 34 16 8 4.5 27 74 -24 -33 48 9 -32 27 33 -33 53 2 -32 22 48 1.11 155 0 0 -33 24 58 16 8 7.4 28 73 -23 -34 5 39 -32 44 50 -34 10 33 -32 40 4 1.11 156 0 0 -33 42 44 16 8 10.4 28 72 -22 -34 23 32 -33 2 30 -34 28 27 -32 57 43 1.11 157 0 0 -34 0 53 16 8 13.4 29 72 -22 -34 41 47 -33 20 32 -34 46 43 -33 15 45 1.11 158 0 0 -34 19 24 16 8 16.6 30 71 -21 -35 0 26 -33 38 57 -35 5 22 -33 34 9 1.11 159 0 0 -34 38 17 16 8 19.7 30 70 -20 -35 19 26 -33 57 43 -35 24 23 -33 52 54 1.11 160 0 0 -34 57 31 16 8 23.0 31 69 -19 -35 38 47 -34 16 50 -35 43 46 -34 12 1 1.11 161 0 0 -35 17 6 16 8 26.3 32 68 -18 -35 58 29 -34 36 18 -36 3 29 -34 31 28 1.11 162 0 0 -35 37 2 16 8 29.6 32 67 -18 -36 18 32 -34 56 7 -36 23 32 -34 51 16 1.11 163 0 0 -35 57 17 16 8 33.1 33 66 -17 -36 38 54 -35 16 15 -36 43 56 -35 11 23 1.11 164 0 0 -36 17 51 16 8 36.5 34 65 -16 -36 59 36 -35 36 42 -37 4 38 -35 31 49 1.11 165 0 0 -36 38 44 16 8 40.0 34 64 -15 -37 20 36 -35 57 28 -37 25 39 -35 52 34 1.11 166 0 0 -36 59 54 16 8 43.6 35 63 -14 -37 41 54 -36 18 31 -37 46 58 -36 13 37 1.11 167 0 0 -37 21 22 16 8 47.2 35 62 -13 -38 3 29 -36 39 52 -38 8 34 -36 34 57 1.11 168 0 0 -37 43 7 16 8 50.9 36 61 -13 -38 25 22 -37 1 30 -38 30 27 -36 56 34 1.11 169 0 0 -38 5 8 16 8 54.6 36 59 -12 -38 47 30 -37 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44 -68 4 50 -66 37 6 1.12 - 93 0 0 -67 26 46 16 13 4.0 15 302 41 -68 6 7 -66 47 56 -68 10 51 -66 43 19 1.12 - 92 0 0 -67 32 39 16 13 4.8 15 301 41 -68 11 55 -66 53 53 -68 16 39 -66 49 17 1.12 - 91 0 0 -67 38 18 16 13 5.5 14 300 42 -68 17 29 -66 59 37 -68 22 12 -66 55 2 1.12 - 90 0 0 -67 43 43 16 13 6.1 14 299 42 -68 22 50 -67 5 7 -68 27 32 -67 0 32 1.12 - 89 0 0 -67 48 55 16 13 6.8 13 298 42 -68 27 57 -67 10 24 -68 32 39 -67 5 49 1.13 - 88 0 0 -67 53 54 16 13 7.4 13 297 42 -68 32 51 -67 15 26 -68 37 33 -67 10 52 1.13 - 87 0 0 -67 58 39 16 13 8.0 13 296 42 -68 37 32 -67 20 16 -68 42 13 -67 15 42 1.13 - 86 0 0 -68 3 11 16 13 8.6 12 295 42 -68 42 0 -67 24 51 -68 46 40 -67 20 18 1.13 - 85 0 0 -68 7 29 16 13 9.2 12 294 42 -68 46 14 -67 29 14 -68 50 54 -67 24 41 1.13 - 84 0 0 -68 11 35 16 13 9.7 12 293 42 -68 50 16 -67 33 23 -68 54 56 -67 28 51 1.13 - 83 0 0 -68 15 28 16 13 10.3 11 292 42 -68 54 5 -67 37 19 -68 58 45 -67 32 47 1.13 - 82 0 0 -68 19 7 16 13 10.8 11 291 42 -68 57 42 -67 41 2 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4 41 1.14 - 69 0 0 -68 47 49 16 13 15.8 6 279 43 -69 25 57 -68 10 9 -69 30 33 -68 5 41 1.15 - 68 0 0 -68 48 36 16 13 16.1 6 278 43 -69 26 43 -68 10 57 -69 31 19 -68 6 28 1.15 - 67 0 0 -68 49 11 16 13 16.3 5 277 43 -69 27 18 -68 11 32 -69 31 53 -68 7 4 1.15 - 66 0 0 -68 49 34 16 13 16.6 5 276 43 -69 27 41 -68 11 55 -69 32 16 -68 7 27 1.16 - 65 0 0 -68 49 45 16 13 16.8 5 275 43 -69 27 51 -68 12 6 -69 32 27 -68 7 38 1.16 - 64 0 0 -68 49 44 16 13 17.0 4 275 43 -69 27 50 -68 12 5 -69 32 26 -68 7 37 1.16 - 63 0 0 -68 49 31 16 13 17.2 4 274 43 -69 27 38 -68 11 52 -69 32 13 -68 7 23 1.17 - 62 0 0 -68 49 6 16 13 17.3 4 273 43 -69 27 13 -68 11 26 -69 31 49 -68 6 58 1.18 - 61 0 0 -68 48 29 16 13 17.5 3 272 43 -69 26 37 -68 10 48 -69 31 13 -68 6 20 1.18 - 60 0 0 -68 47 40 16 13 17.6 3 271 43 -69 25 49 -68 9 58 -69 30 25 -68 5 30 1.19 - 59 0 0 -68 46 39 16 13 17.7 2 270 43 -69 24 49 -68 8 56 -69 29 25 -68 4 28 1.21 - 58 0 0 -68 45 25 16 13 17.8 2 269 43 -69 23 37 -68 7 42 -69 28 13 -68 3 13 1.22 - 57 0 0 -68 44 0 16 13 17.9 2 268 43 -69 22 13 -68 6 15 -69 26 49 -68 1 46 1.25 - 56 0 0 -68 42 23 16 13 18.0 1 267 43 -69 20 38 -68 4 36 -69 25 14 -68 0 7 1.28 - 55 0 0 -68 40 33 16 13 18.1 1 266 43 -69 18 50 -68 2 45 -69 23 27 -67 58 15 1.34 - 54 0 0 -68 38 32 16 13 18.1 1 265 43 -69 16 51 -68 0 41 -69 21 27 -67 56 11 1.47 - 53 0 0 -68 36 18 16 13 18.1 0 264 42 -69 14 39 -67 58 25 -69 19 16 -67 53 55 1.93 - 52 0 0 .. .. .... .. .. .. .. .. .. -69 12 15 .. .. .. -69 16 52 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 4914-00733-1 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 10 59 14.1046 DE: -02 14 51.684 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 10 59 14.1053 DE: -02 14 51.688 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.3 * B mag [mag]: 9.6 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (313) Chaldaea asteroid class: approx. diameter [km]: 94 approx. diameter ["]: 0.071 distance from Earth [AU]: 1.82450 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#112 date of fit: 2023 Feb 07 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): 0.019", 0.001", 97.995° remarks: * orbital elements for (313)Chaldaea : Mean anomaly = 2.5406239948 deg Arg. of pericenter = 315.6604719244 deg Long. of node = 176.5372395731 deg Inclination = 11.6445858645 deg Eccentricity = 0.1808247280 Semimajor axis = 2.3752594854 AU Perihelion dist = 1.9457538349 AU Mag: H = 9.09, G = 0.15 Epoch of elements : MJD 60644.67381046 TDT (2024 Nov 30.6738) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1122023Feb07,3.99,2024,11,30,16.171455,-0.260587,-0.695644,12.437798,-4.627203,-0.004984,0.001983,0.000000,0.000000 -147.4688,-2.3798,-65.35,-21.79,False TYC 4914-00733-1,10.98725125,-2.2476899,9.57,9.26,9.09,0.1,0,,11.00836647,-2.3797617,3.91,3.64,0,0,0 313,Chaldaea,13.14,93.696,1.8245,0,0,4.001,-22.31,,5.6,0 0,2.3592,2024,11,30,315.6605,176.5372,11.6446,0.18082,2.37526,1.94575,9.09,5.0,0.15 1.060,0.0190,0.0011,98,0.0042,Known errors,0.92,0,-1,-1 20241130_0733-1,60140.72 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org