IOTA/IOTA-ES occultation update for (1450) Raimonda / UCAC4 321-219870 event on 2024 Oct 17, 23:18 UT Visible from Summary ------- On 2024 Oct 17 UT, the 16.984 km diameter asteroid (1450) Raimonda will occult a 10.5 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 7.38 mag to 17.85 mag (the magnitude of the asteroid) for at most 1.030 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 17, 23:12 - 2024 Oct 17, 23:25 * geocentric midpoint of event [JD]: 2460601.47145479 * magnitude of target star: 10.47 * magnitude drop [mag]: 7.38 * estimated maximum duration [s]: 1.030 * Moon: 100 % sunlit, 100° distance * Sun: 87° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.15 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.001", 84°) * approx speed of asteroid's shadow [km/s]: 16.5241 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 321-219870 by 1450 Raimonda on 2024 Oct 17 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 174 0 0 -30 46 44 23 12 52.8 1 120 65 -30 52 27 -30 41 1 -30 54 7 -30 39 21 .... 175 0 0 -31 16 45 23 12 52.9 2 119 65 -31 22 28 -31 11 3 -31 24 8 -31 9 23 0.38 176 0 0 -31 46 28 23 12 53.2 3 119 65 -31 52 10 -31 40 46 -31 53 51 -31 39 7 0.38 177 0 0 -32 15 52 23 12 53.6 4 118 65 -32 21 33 -32 10 10 -32 23 13 -32 8 30 0.39 178 0 0 -32 44 55 23 12 54.1 5 118 65 -32 50 36 -32 39 14 -32 52 15 -32 37 34 0.39 179 0 0 -33 13 37 23 12 54.8 6 117 65 -33 19 17 -33 7 57 -33 20 57 -33 6 17 0.39 -180 0 0 -33 41 58 23 12 55.5 7 117 65 -33 47 38 -33 36 18 -33 49 17 -33 34 39 0.39 -179 0 0 -34 9 57 23 12 56.4 7 116 65 -34 15 37 -34 4 19 -34 17 16 -34 2 40 0.39 -178 0 0 -34 37 34 23 12 57.3 8 116 65 -34 43 13 -34 31 56 -34 44 52 -34 30 17 0.39 -177 0 0 -35 4 48 23 12 58.4 9 115 64 -35 10 26 -34 59 11 -35 12 5 -34 57 32 0.39 -176 0 0 -35 31 39 23 12 59.5 10 114 64 -35 37 16 -35 26 3 -35 38 55 -35 24 24 0.39 -175 0 0 -35 58 7 23 13 0.8 11 114 64 -36 3 43 -35 52 31 -36 5 21 -35 50 53 0.39 -174 0 0 -36 24 10 23 13 2.1 12 113 63 -36 29 46 -36 18 35 -36 31 24 -36 16 57 0.39 -173 0 0 -36 49 50 23 13 3.6 13 113 63 -36 55 24 -36 44 15 -36 57 2 -36 42 37 0.39 -172 0 0 -37 15 4 23 13 5.1 14 112 63 -37 20 38 -37 9 31 -37 22 16 -37 7 53 0.39 -171 0 0 -37 39 54 23 13 6.8 15 111 62 -37 45 27 -37 34 21 -37 47 5 -37 32 44 0.39 -170 0 0 -38 4 19 23 13 8.5 16 111 62 -38 9 51 -37 58 47 -38 11 28 -37 57 10 0.39 -169 0 0 -38 28 18 23 13 10.3 17 110 61 -38 33 50 -38 22 47 -38 35 27 -38 21 11 0.39 -168 0 0 -38 51 52 23 13 12.1 17 109 61 -38 57 23 -38 46 22 -38 58 59 -38 44 46 0.39 -167 0 0 -39 15 1 23 13 14.1 18 109 60 -39 20 30 -39 9 31 -39 22 7 -39 7 55 0.39 -166 0 0 -39 37 43 23 13 16.1 19 108 60 -39 43 12 -39 32 15 -39 44 48 -39 30 39 0.39 -165 0 0 -40 0 0 23 13 18.2 20 107 59 -40 5 28 -39 54 32 -40 7 4 -39 52 57 0.39 -164 0 0 -40 21 50 23 13 20.4 21 107 59 -40 27 17 -40 16 24 -40 28 53 -40 14 48 0.39 -163 0 0 -40 43 15 23 13 22.6 22 106 58 -40 48 41 -40 37 49 -40 50 16 -40 36 14 0.39 -162 0 0 -41 4 13 23 13 24.9 23 105 57 -41 9 38 -40 58 49 -41 11 13 -40 57 14 0.39 -161 0 0 -41 24 45 23 13 27.2 23 105 57 -41 30 10 -41 19 22 -41 31 44 -41 17 47 0.39 -160 0 0 -41 44 51 23 13 29.7 24 104 56 -41 50 15 -41 39 28 -41 51 49 -41 37 54 0.39 -159 0 0 -42 4 31 23 13 32.1 25 103 56 -42 9 53 -41 59 9 -42 11 28 -41 57 35 0.39 -158 0 0 -42 23 45 23 13 34.7 26 102 55 -42 29 6 -42 18 23 -42 30 40 -42 16 50 0.39 -157 0 0 -42 42 32 23 13 37.2 27 102 54 -42 47 52 -42 37 12 -42 49 26 -42 35 38 0.39 -156 0 0 -43 0 53 23 13 39.9 27 101 54 -43 6 13 -42 55 34 -43 7 46 -42 54 1 0.39 -155 0 0 -43 18 48 23 13 42.6 28 100 53 -43 24 7 -43 13 30 -43 25 40 -43 11 57 0.39 -154 0 0 -43 36 17 23 13 45.3 29 99 53 -43 41 35 -43 31 0 -43 43 8 -43 29 27 0.38 -153 0 0 -43 53 20 23 13 48.1 30 98 52 -43 58 37 -43 48 4 -44 0 10 -43 46 31 0.38 -152 0 0 -44 9 58 23 13 50.9 30 98 51 -44 15 13 -44 4 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38 21 23 24 32.2 19 248 -62 -15 44 5 -15 32 38 -15 45 45 -15 30 58 0.41 - 6 0 0 -15 4 36 23 24 34.8 18 247 -63 -15 10 19 -14 58 53 -15 11 59 -14 57 13 0.41 - 5 0 0 -14 30 59 23 24 37.2 17 247 -64 -14 36 41 -14 25 17 -14 38 22 -14 23 37 0.41 - 4 0 0 -13 57 33 23 24 39.4 16 247 -65 -14 3 15 -13 51 51 -14 4 55 -13 50 12 0.42 - 3 0 0 -13 24 18 23 24 41.5 14 246 -66 -13 29 59 -13 18 37 -13 31 39 -13 16 58 0.42 - 2 0 0 -12 51 16 23 24 43.5 13 246 -66 -12 56 56 -12 45 36 -12 58 36 -12 43 56 0.42 - 1 0 0 -12 18 27 23 24 45.3 12 246 -67 -12 24 6 -12 12 47 -12 25 46 -12 11 8 0.42 0 0 0 -11 45 52 23 24 46.9 11 246 -68 -11 51 31 -11 40 13 -11 53 10 -11 38 34 0.43 1 0 0 -11 13 32 23 24 48.4 10 245 -69 -11 19 10 -11 7 55 -11 20 49 -11 6 16 0.43 2 0 0 -10 41 29 23 24 49.7 9 245 -69 -10 47 6 -10 35 52 -10 48 45 -10 34 14 0.44 3 0 0 -10 9 43 23 24 50.9 8 245 -70 -10 15 19 -10 4 6 -10 16 57 -10 2 28 0.44 4 0 0 - 9 38 14 23 24 51.9 7 245 -71 - 9 43 50 - 9 32 39 - 9 45 28 - 9 31 1 0.45 5 0 0 - 9 7 4 23 24 52.7 5 245 -71 - 9 12 39 - 9 1 30 - 9 14 17 - 8 59 52 0.46 6 0 0 - 8 36 14 23 24 53.4 4 245 -72 - 8 41 48 - 8 30 40 - 8 43 25 - 8 29 3 0.48 7 0 0 - 8 5 44 23 24 53.9 3 244 -72 - 8 11 17 - 8 0 11 - 8 12 54 - 7 58 34 0.51 8 0 0 - 7 35 35 23 24 54.3 2 244 -72 - 7 41 7 - 7 30 3 - 7 42 44 - 7 28 26 0.57 9 0 0 - 7 5 47 23 24 54.5 1 244 -73 - 7 11 18 - 7 0 16 - 7 12 55 - 6 58 39 0.76 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 321-219870 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 38 00.9655 DE: -25 51 49.699 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 38 00.9653 DE: -25 51 49.699 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 10.5 * B mag [mag]: 10.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1450) Raimonda asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.77280 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 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): 0.008", 0.001", 83.538° remarks: * orbital elements for (1450)Raimonda : Mean anomaly = 237.1330977049 deg Arg. of pericenter = 14.8483991366 deg Long. of node = 74.8368648580 deg Inclination = 4.8550408394 deg Eccentricity = 0.1715684286 Semimajor axis = 2.6109262581 AU Perihelion dist = 2.1629737429 AU Mag: H = 12.32, G = 0.15 Epoch of elements : MJD 60600.97145475 TDT (2024 Oct 17.9715) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,1.03,2024,10,17,23.314915,0.081952,-0.343599,9.074776,2.152964,0.005700,0.000948,0.000000,0.000000 -81.7891,-25.8092,-173.43,-9.71,False UCAC4 321-219870,19.63360154,-25.8638052,10.78,10.47,10.30,0.0,0,,19.65878266,-25.8091509,7.38,7.10,0,0,0 1450,Raimonda,17.85,16.984,2.7728,0,0,2.132,6.83,,1.2,0 0,236.9061,2024,10,17,14.8484,74.8369,4.8550,0.17157,2.61093,2.16297,12.32,5.0,0.15 1.146,0.0080,0.0008,84,0.0012,Known errors,1.60,0,-1,-1 20241017_219870,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:24 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org