IOTA/IOTA-ES occultation update for (1073) Gellivara / UCAC4 326-136360 event on 2024 Oct 10, 09:48 UT Visible from Summary ------- On 2024 Oct 10 UT, the 27.1216930337144 km diameter asteroid (1073) Gellivara will occult a 11.0 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.16 mag to 17.11 mag (the magnitude of the asteroid) for at most 1.120 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 Oct 10, 09:45 - 2024 Oct 10, 09:52 * geocentric midpoint of event [JD]: 2460593.90869867 * magnitude of target star: 10.95 * magnitude drop [mag]: 6.16 * estimated maximum duration [s]: 1.120 * Moon: 47 % sunlit, 10° distance * Sun: 77° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 35 * 1 sigma uncertainty interval [path widths]: +/- 0.08 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.023, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.001", 89°) * approx speed of asteroid's shadow [km/s]: 25.0074 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 326-136360 by 1073 Gellivara on 2024 Oct 10 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 0 0 0 -35 22 41 9 45 6.8 0 121 50 -35 33 48 -35 11 35 -35 35 33 -35 9 52 .... 1 0 0 -35 52 16 9 45 6.9 1 120 50 -36 3 25 -35 41 10 -36 5 9 -35 39 26 0.62 2 0 0 -36 21 50 9 45 7.0 2 120 51 -36 32 59 -36 10 42 -36 34 43 -36 8 59 0.68 3 0 0 -36 51 20 9 45 7.3 3 119 51 -37 2 30 -36 40 12 -37 4 14 -36 38 28 0.70 4 0 0 -37 20 46 9 45 7.6 4 118 51 -37 31 56 -37 9 37 -37 33 41 -37 7 53 0.71 5 0 0 -37 50 7 9 45 8.0 5 118 51 -38 1 18 -37 38 58 -38 3 3 -37 37 14 0.72 6 0 0 -38 19 22 9 45 8.5 6 117 52 -38 30 34 -38 8 13 -38 32 19 -38 6 28 0.73 7 0 0 -38 48 31 9 45 9.1 7 117 52 -38 59 43 -38 37 21 -39 1 28 -38 35 37 0.73 8 0 0 -39 17 32 9 45 9.7 8 116 52 -39 28 44 -39 6 21 -39 30 29 -39 4 37 0.73 9 0 0 -39 46 25 9 45 10.4 9 115 52 -39 57 37 -39 35 14 -39 59 22 -39 33 29 0.73 10 0 0 -40 15 8 9 45 11.2 9 115 52 -40 26 21 -40 3 57 -40 28 6 -40 2 12 0.74 11 0 0 -40 43 41 9 45 12.1 10 114 52 -40 54 54 -40 32 30 -40 56 39 -40 30 45 0.74 12 0 0 -41 12 3 9 45 13.0 11 113 52 -41 23 16 -41 0 52 -41 25 1 -40 59 7 0.74 13 0 0 -41 40 13 9 45 14.0 12 113 52 -41 51 26 -41 29 2 -41 53 11 -41 27 18 0.74 14 0 0 -42 8 11 9 45 15.1 13 112 52 -42 19 24 -41 57 0 -42 21 9 -41 55 16 0.74 15 0 0 -42 35 56 9 45 16.2 14 111 52 -42 47 8 -42 24 45 -42 48 53 -42 23 1 0.74 16 0 0 -43 3 26 9 45 17.4 15 110 52 -43 14 39 -42 52 16 -43 16 24 -42 50 32 0.74 17 0 0 -43 30 42 9 45 18.6 16 110 52 -43 41 54 -43 19 32 -43 43 39 -43 17 48 0.74 18 0 0 -43 57 43 9 45 20.0 16 109 51 -44 8 54 -43 46 33 -44 10 39 -43 44 49 0.74 19 0 0 -44 24 28 9 45 21.3 17 108 51 -44 35 39 -44 13 19 -44 37 23 -44 11 35 0.74 20 0 0 -44 50 56 9 45 22.7 18 107 51 -45 2 6 -44 39 48 -45 3 51 -44 38 4 0.74 21 0 0 -45 17 7 9 45 24.2 19 107 51 -45 28 17 -45 5 59 -45 30 1 -45 4 15 0.74 22 0 0 -45 43 1 9 45 25.7 20 106 51 -45 54 9 -45 31 54 -45 55 54 -45 30 10 0.74 23 0 0 -46 8 36 9 45 27.3 20 105 50 -46 19 44 -45 57 30 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45.4 15 250 -44 -38 15 22 -37 53 0 -38 17 7 -37 51 16 0.78 -162 0 0 -37 34 45 9 51 46.7 14 249 -45 -37 45 57 -37 23 36 -37 47 41 -37 21 52 0.79 -161 0 0 -37 5 15 9 51 47.9 13 249 -45 -37 16 26 -36 54 6 -37 18 10 -36 52 22 0.79 -160 0 0 -36 35 40 9 51 49.1 12 248 -46 -36 46 50 -36 24 32 -36 48 35 -36 22 48 0.79 -159 0 0 -36 6 1 9 51 50.2 11 247 -46 -36 17 11 -35 54 54 -36 18 55 -35 53 10 0.80 -158 0 0 -35 36 20 9 51 51.2 10 247 -47 -35 47 29 -35 25 14 -35 49 13 -35 23 30 0.80 -157 0 0 -35 6 37 9 51 52.1 10 246 -48 -35 17 45 -34 55 32 -35 19 29 -34 53 48 0.81 -156 0 0 -34 36 54 9 51 53.0 9 246 -48 -34 48 0 -34 25 49 -34 49 44 -34 24 6 0.82 -155 0 0 -34 7 10 9 51 53.7 8 245 -49 -34 18 16 -33 56 7 -34 20 0 -33 54 24 0.82 -154 0 0 -33 37 28 9 51 54.4 7 245 -49 -33 48 32 -33 26 26 -33 50 16 -33 24 43 0.83 -153 0 0 -33 7 48 9 51 55.0 6 244 -50 -33 18 51 -32 56 47 -33 20 35 -32 55 4 0.85 -152 0 0 -32 38 11 9 51 55.5 5 243 -51 -32 49 13 -32 27 11 -32 50 56 -32 25 28 0.87 -151 0 0 -32 8 38 9 51 55.9 4 243 -51 -32 19 39 -31 57 39 -32 21 22 -31 55 57 0.90 -150 0 0 -31 39 10 9 51 56.2 3 242 -52 -31 50 9 -31 28 13 -31 51 52 -31 26 31 0.96 -149 0 0 -31 9 48 9 51 56.4 2 242 -52 -31 20 46 -30 58 52 -31 22 29 -30 57 10 1.07 -148 0 0 -30 40 33 9 51 56.6 1 241 -52 -30 51 30 -30 29 39 -30 53 12 -30 27 57 1.49 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 326-136360 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 17 05.1751 DE: -24 54 09.606 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 17 05.1751 DE: -24 54 09.606 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 11.0 * B mag [mag]: 12.8 * Diameter [mas]: 0.50 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1073) Gellivara asteroid class: approx. diameter [km]: 27 approx. diameter ["]: 0.014 distance from Earth [AU]: 2.70880 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#62 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): 0.023", 0.001", 89.34° remarks: * orbital elements for (1073)Gellivara : Mean anomaly = 336.6404621762 deg Arg. of pericenter = 289.8412629768 deg Long. of node = 39.5321599345 deg Inclination = 1.5978421434 deg Eccentricity = 0.1869249311 Semimajor axis = 3.1849897331 AU Perihelion dist = 2.5896357469 AU Mag: H = 11.79, G = 0.15 Epoch of elements : MJD 60593.40869833 TDT (2024 Oct 10.4087) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#622023Apr24,1.12,2024,10,10,9.808768,0.029414,-0.593159,14.097118,0.708262,0.005562,0.000146,0.000000,0.000000 108.0260,-24.8948,29.59,-6.90,False UCAC4 326-136360,18.28477090,-24.9026684,12.82,10.95,9.94,0.5,4,,18.31003716,-24.8947602,6.17,6.73,0,0,0 1073,Gellivara,17.11,28.104,2.7088,0,0,3.364,2.30,,2.0,0 0,336.5696,2024,10,10,289.8413,39.5322,1.5978,0.18692,3.18499,2.58964,11.78,5.0,0.15 1.078,0.0227,0.0007,89,0.0011,Known errors,0.73,0,-1,-1 20241010_136360,60140.62 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org