IOTA/IOTA-ES occultation update for (643) Scheherezade / TYC 1789-00169-1 event on 2024 Oct 01, 14:23 UT Visible from Summary ------- On 2024 Oct 01 UT, the 66.951 km diameter asteroid (643) Scheherezade will occult a 11.6 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 3.61 mag to 15.12 mag (the magnitude of the asteroid) for at most 9.270 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 01, 14:12 - 2024 Oct 01, 14:33 * geocentric midpoint of event [JD]: 2460585.09955870 * magnitude of target star: 11.55 * magnitude drop [mag]: 3.61 * estimated maximum duration [s]: 9.270 * Moon: 1 % sunlit, 125° distance * Sun: 139° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 98 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 6.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.027, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.027", 0.005", 86°) * approx speed of asteroid's shadow [km/s]: 7.2201 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1789-00169-1 by 643 Scheherezade on 2024 Oct 1 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 131 0 0 .. .. .... .. .. .. .. .. .. -53 48 49 .. .. .. -53 27 28 .. .. .. .... 132 0 0 -53 47 0 14 33 21.2 1 37 -32 -53 2 50 -54 32 13 -52 41 36 .. .. .. .... 133 0 0 -53 0 24 14 33 20.7 2 36 -33 -52 16 30 -53 45 19 -51 55 24 -54 7 39 0.68 134 0 0 -52 13 28 14 33 19.8 3 35 -34 -51 29 52 -52 58 4 -51 8 54 -53 20 15 0.83 135 0 0 -51 26 16 14 33 18.5 4 34 -35 -50 42 58 -52 10 32 -50 22 10 -52 32 33 0.90 136 0 0 -50 38 50 14 33 16.8 5 33 -36 -49 55 52 -51 22 46 -49 35 13 -51 44 36 0.95 137 0 0 -49 51 15 14 33 14.7 6 33 -37 -49 8 37 -50 34 49 -48 48 7 -50 56 28 0.98 138 0 0 -49 3 32 14 33 12.2 7 32 -38 -48 21 15 -49 46 44 -48 0 55 -50 8 12 1.00 139 0 0 -48 15 45 14 33 9.3 8 31 -38 -47 33 50 -48 58 35 -47 13 39 -49 19 50 1.01 140 0 0 -47 27 57 14 33 5.9 9 30 -39 -46 46 24 -48 10 23 -46 26 23 -48 31 27 1.03 141 0 0 -46 40 11 14 33 2.1 10 30 -40 -45 59 0 -47 22 14 -45 39 10 -47 43 6 1.04 142 0 0 -45 52 29 14 32 57.8 11 29 -41 -45 11 40 -46 34 8 -44 52 1 -46 54 48 1.05 143 0 0 -45 4 55 14 32 53.1 12 28 -41 -44 24 28 -45 46 9 -44 5 0 -46 6 36 1.05 144 0 0 -44 17 30 14 32 48.0 13 27 -42 -43 37 26 -44 58 20 -43 18 8 -45 18 35 1.06 145 0 0 -43 30 17 14 32 42.4 14 27 -43 -42 50 36 -44 10 42 -42 31 29 -44 30 45 1.06 146 0 0 -42 43 18 14 32 36.5 15 26 -43 -42 4 1 -43 23 20 -41 45 5 -43 43 10 1.07 147 0 0 -41 56 37 14 32 30.1 16 25 -44 -41 17 43 -42 36 14 -40 58 57 -42 55 52 1.07 148 0 0 -41 10 14 14 32 23.2 17 24 -45 -40 31 43 -41 49 27 -40 13 8 -42 8 53 1.07 149 0 0 -40 24 13 14 32 16.0 18 24 -45 -39 46 5 -41 3 2 -39 27 41 -41 22 15 1.08 150 0 0 -39 38 35 14 32 8.4 19 23 -46 -39 0 49 -40 17 0 -38 42 36 -40 36 1 1.08 151 0 0 -38 53 21 14 32 0.4 20 22 -46 -38 15 58 -39 31 23 -37 57 55 -39 50 12 1.08 152 0 0 -38 8 34 14 31 52.0 21 21 -47 -37 31 33 -38 46 13 -37 13 41 -39 4 50 1.08 153 0 0 -37 24 15 14 31 43.2 22 21 -47 -36 47 36 -38 1 31 -36 29 54 -38 19 57 1.08 154 0 0 -36 40 26 14 31 34.1 23 20 -48 -36 4 8 -37 17 19 -35 46 36 -37 35 33 1.08 155 0 0 -35 57 8 14 31 24.6 24 19 -48 -35 21 11 -36 33 38 -35 3 49 -36 51 42 1.08 156 0 0 -35 14 22 14 31 14.8 25 18 -48 -34 38 46 -35 50 31 -34 21 34 -36 8 23 1.09 157 0 0 -34 32 9 14 31 4.7 26 18 -49 -33 56 54 -35 7 57 -33 39 51 -35 25 38 1.09 158 0 0 -33 50 32 14 30 54.2 27 17 -49 -33 15 36 -34 25 58 -32 58 43 -34 43 29 1.09 159 0 0 -33 9 29 14 30 43.5 28 16 -49 -32 34 54 -33 44 35 -32 18 10 -34 1 56 1.09 160 0 0 -32 29 4 14 30 32.4 28 15 -49 -31 54 47 -33 3 50 -31 38 13 -33 21 0 1.09 161 0 0 -31 49 16 14 30 21.1 29 14 -49 -31 15 18 -32 23 42 -30 58 52 -32 40 42 1.09 162 0 0 -31 10 6 14 30 9.5 30 13 -49 -30 36 27 -31 44 13 -30 20 10 -32 1 4 1.09 163 0 0 -30 31 36 14 29 57.6 31 13 -49 -29 58 14 -31 5 24 -29 42 6 -31 22 5 1.09 164 0 0 -29 53 45 14 29 45.5 32 12 -49 -29 20 41 -30 27 15 -29 4 41 -30 43 47 1.09 165 0 0 -29 16 34 14 29 33.2 32 11 -49 -28 43 47 -29 49 47 -28 27 55 -30 6 10 1.09 166 0 0 -28 40 4 14 29 20.6 33 10 -49 -28 7 34 -29 12 59 -27 51 50 -29 29 14 1.09 167 0 0 -28 4 16 14 29 7.9 34 9 -49 -27 32 2 -28 36 54 -27 16 25 -28 53 0 1.09 168 0 0 -27 29 9 14 28 54.9 35 8 -49 -26 57 11 -28 1 31 -26 41 42 -28 17 29 1.08 169 0 0 -26 54 45 14 28 41.8 35 7 -49 -26 23 2 -27 26 51 -26 7 40 -27 42 41 1.08 170 0 0 -26 21 3 14 28 28.5 36 6 -49 -25 49 35 -26 52 53 -25 34 20 -27 8 35 1.08 171 0 0 -25 48 4 14 28 15.0 37 5 -48 -25 16 50 -26 19 40 -25 1 43 -26 35 14 1.08 172 0 0 -25 15 48 14 28 1.4 37 4 -48 -24 44 49 -25 47 9 -24 29 48 -26 2 36 1.08 173 0 0 -24 44 16 14 27 47.6 38 3 -48 -24 13 30 -25 15 22 -23 58 35 -25 30 43 1.08 174 0 0 -24 13 27 14 27 33.7 38 2 -47 -23 42 54 -24 44 20 -23 28 6 -24 59 33 1.08 175 0 0 -23 43 22 14 27 19.7 39 1 -47 -23 13 2 -24 14 2 -22 58 20 -24 29 8 1.08 176 0 0 -23 14 0 14 27 5.6 39 360 -46 -22 43 53 -23 44 28 -22 29 17 -23 59 28 1.08 177 0 0 -22 45 23 14 26 51.5 40 359 -46 -22 15 28 -23 15 38 -22 0 57 -23 30 32 1.08 178 0 0 -22 17 30 14 26 37.2 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Uncertainty in time = +/- 7 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 1789-00169-1 * constellation : Aries * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 02 52 07.4570 DE: +27 31 18.614 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 02 52 07.4571 DE: +27 31 18.616 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.6 * B mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (643) Scheherezade asteroid class: approx. diameter [km]: 67 approx. diameter ["]: 0.037 distance from Earth [AU]: 2.51140 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 date of fit: 2022 Nov 22 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): 0.027", 0.005", 86.266° remarks: * orbital elements for (643)Scheherezade : Mean anomaly = 283.0654713236 deg Arg. of pericenter = 227.8806777772 deg Long. of node = 252.1416544826 deg Inclination = 13.7741051745 deg Eccentricity = 0.0567528319 Semimajor axis = 3.3621555915 AU Perihelion dist = 3.1713437404 AU Mag: H = 9.80, G = 0.15 Epoch of elements : MJD 60584.59955362 TDT (2024 Oct 01.5996) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542022Nov22,9.27,2024,10,1,14.389409,0.241941,-0.689544,-3.844078,-1.352964,-0.003389,-0.001903,0.000001,0.000000 176.7492,27.6246,-38.47,-3.53,False TYC 1789-00169-1,2.86873804,27.5218372,11.92,11.55,11.35,0.0,0,,2.89338022,27.6245801,3.61,3.37,0,0,0 643,Scheherezade,15.12,66.951,2.5114,0,0,-1.013,-4.74,,3.8,0 0,282.9696,2024,10,1,227.8807,252.1417,13.7741,0.05675,3.36216,3.17134,9.80,5.0,0.15 1.244,0.0273,0.0053,86,0.0090,Known errors,1.11,0,-1,-1 20241001_0169-1,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org