IOTA/IOTA-ES occultation update for (12243) 1988 RD1 / TYC 5769-00156-1 event on 2024 Oct 20, 08:26 UT Visible from Summary ------- On 2024 Oct 20 UT, the 9.85317405140908 km diameter asteroid (12243) 1988 RD1 will occult a 10.5 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 7.50 mag to 17.96 mag (the magnitude of the asteroid) for at most 1.010 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 20, 08:17 - 2024 Oct 20, 08:35 * geocentric midpoint of event [JD]: 2460603.85154529 * magnitude of target star: 10.46 * magnitude drop [mag]: 7.50 * estimated maximum duration [s]: 1.010 * Moon: 89 % sunlit, 113° distance * Sun: 105° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 3.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.011) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.001", 63°) * approx speed of asteroid's shadow [km/s]: 9.8986 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5769-00156-1 by 12243 1988 RD1 on 2024 Oct 20 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 46 0 0 -59 24 7 8 17 26.9 0 118 41 -59 27 54 -59 20 21 -59 29 43 -59 18 32 .... 47 0 0 -59 40 24 8 17 27.0 1 117 41 -59 44 10 -59 36 39 -59 45 58 -59 34 51 0.65 48 0 0 -59 56 15 8 17 27.2 1 116 41 -60 0 0 -59 52 31 -60 1 48 -59 50 43 0.68 49 0 0 -60 11 40 8 17 27.4 2 115 40 -60 15 23 -60 7 56 -60 17 11 -60 6 9 0.69 50 0 0 -60 26 39 8 17 27.7 2 115 40 -60 30 22 -60 22 57 -60 32 9 -60 21 10 0.69 51 0 0 -60 41 13 8 17 28.1 3 114 40 -60 44 55 -60 37 32 -60 46 42 -60 35 46 0.70 52 0 0 -60 55 23 8 17 28.5 4 113 40 -60 59 4 -60 51 42 -61 0 50 -60 49 56 0.70 53 0 0 -61 9 8 8 17 29.0 4 112 39 -61 12 47 -61 5 28 -61 14 33 -61 3 42 0.70 54 0 0 -61 22 28 8 17 29.6 5 111 39 -61 26 7 -61 18 49 -61 27 52 -61 17 4 0.70 55 0 0 -61 35 25 8 17 30.2 5 110 39 -61 39 3 -61 31 47 -61 40 48 -61 30 2 0.70 56 0 0 -61 47 58 8 17 30.9 6 109 39 -61 51 35 -61 44 21 -61 53 19 -61 42 37 0.70 57 0 0 -62 0 8 8 17 31.7 6 108 38 -62 3 44 -61 56 32 -62 5 28 -61 54 48 0.70 58 0 0 -62 11 55 8 17 32.5 7 108 38 -62 15 30 -62 8 20 -62 17 14 -62 6 36 0.70 59 0 0 -62 23 19 8 17 33.3 7 107 38 -62 26 54 -62 19 45 -62 28 37 -62 18 2 0.70 60 0 0 -62 34 21 8 17 34.2 8 106 38 -62 37 55 -62 30 48 -62 39 38 -62 29 5 0.70 61 0 0 -62 45 2 8 17 35.2 8 105 37 -62 48 34 -62 41 29 -62 50 17 -62 39 47 0.70 62 0 0 -62 55 20 8 17 36.2 9 104 37 -62 58 52 -62 51 48 -63 0 34 -62 50 6 0.70 63 0 0 -63 5 17 8 17 37.2 9 103 37 -63 8 48 -63 1 46 -63 10 30 -63 0 5 0.70 64 0 0 -63 14 53 8 17 38.3 10 102 37 -63 18 23 -63 11 23 -63 20 5 -63 9 42 0.70 65 0 0 -63 24 8 8 17 39.5 10 101 36 -63 27 38 -63 20 38 -63 29 19 -63 18 58 0.70 66 0 0 -63 33 3 8 17 40.6 11 100 36 -63 36 32 -63 29 34 -63 38 12 -63 27 53 0.70 67 0 0 -63 41 37 8 17 41.9 11 99 36 -63 45 5 -63 38 9 -63 46 45 -63 36 29 0.70 68 0 0 -63 49 51 8 17 43.1 12 99 36 -63 53 19 -63 46 24 -63 54 59 -63 44 44 0.70 69 0 0 -63 57 46 8 17 44.4 12 98 35 -64 1 13 -63 54 19 -64 2 52 -63 52 39 0.70 70 0 0 -64 5 21 8 17 45.8 12 97 35 -64 8 47 -64 1 54 -64 10 26 -64 0 15 0.70 71 0 0 -64 12 36 8 17 47.2 13 96 35 -64 16 2 -64 9 11 -64 17 41 -64 7 32 0.70 72 0 0 -64 19 33 8 17 48.6 13 95 34 -64 22 58 -64 16 8 -64 24 37 -64 14 29 0.70 73 0 0 -64 26 10 8 17 50.0 14 94 34 -64 29 35 -64 22 46 -64 31 13 -64 21 8 0.70 74 0 0 -64 32 29 8 17 51.5 14 93 34 -64 35 54 -64 29 6 -64 37 32 -64 27 28 0.70 75 0 0 -64 38 30 8 17 53.1 15 92 34 -64 41 54 -64 35 7 -64 43 31 -64 33 29 0.70 76 0 0 -64 44 12 8 17 54.6 15 91 33 -64 47 35 -64 40 49 -64 49 13 -64 39 12 0.70 77 0 0 -64 49 37 8 17 56.2 16 90 33 -64 52 59 -64 46 14 -64 54 37 -64 44 37 0.70 78 0 0 -64 54 43 8 17 57.9 16 89 33 -64 58 5 -64 51 21 -64 59 42 -64 49 44 0.70 79 0 0 -64 59 32 8 17 59.5 16 88 32 -65 2 53 -64 56 10 -65 4 30 -64 54 33 0.70 80 0 0 -65 4 3 8 18 1.2 17 87 32 -65 7 24 -65 0 41 -65 9 1 -64 59 5 0.70 81 0 0 -65 8 16 8 18 3.0 17 87 32 -65 11 37 -65 4 55 -65 13 14 -65 3 19 0.70 82 0 0 -65 12 12 8 18 4.8 18 86 32 -65 15 33 -65 8 52 -65 17 9 -65 7 16 0.70 83 0 0 -65 15 51 8 18 6.6 18 85 31 -65 19 12 -65 12 31 -65 20 48 -65 10 55 0.70 84 0 0 -65 19 13 8 18 8.4 18 84 31 -65 22 33 -65 15 54 -65 24 9 -65 14 18 0.70 85 0 0 -65 22 18 8 18 10.3 19 83 31 -65 25 38 -65 18 59 -65 27 14 -65 17 23 0.70 86 0 0 -65 25 7 8 18 12.2 19 82 30 -65 28 26 -65 21 47 -65 30 2 -65 20 12 0.70 87 0 0 -65 27 38 8 18 14.1 20 81 30 -65 30 57 -65 24 19 -65 32 33 -65 22 44 0.70 88 0 0 -65 29 53 8 18 16.1 20 80 30 -65 33 11 -65 26 34 -65 34 47 -65 24 59 0.70 89 0 0 -65 31 51 8 18 18.1 21 79 29 -65 35 9 -65 28 32 -65 36 45 -65 26 57 0.70 90 0 0 -65 33 32 8 18 20.2 21 78 29 -65 36 51 -65 30 14 -65 38 26 -65 28 39 0.70 91 0 0 -65 34 57 8 18 22.3 21 77 29 -65 38 16 -65 31 39 -65 39 51 -65 30 4 0.70 92 0 0 -65 36 6 8 18 24.4 22 76 28 -65 39 24 -65 32 48 -65 40 59 -65 31 13 0.70 93 0 0 -65 36 58 8 18 26.5 22 75 28 -65 40 16 -65 33 40 -65 41 51 -65 32 5 0.70 94 0 0 -65 37 34 8 18 28.7 23 74 28 -65 40 52 -65 34 16 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47.4 49 3 -1 -55 26 27 -55 18 30 -55 28 22 -55 16 36 0.69 158 0 0 -54 59 3 8 22 54.8 49 2 -1 -55 3 3 -54 55 4 -55 4 58 -54 53 9 0.69 159 0 0 -54 35 4 8 23 2.3 50 0 -2 -54 39 5 -54 31 3 -54 41 1 -54 29 8 0.69 160 0 0 -54 10 31 8 23 9.9 50 359 -3 -54 14 33 -54 6 30 -54 16 30 -54 4 34 0.69 161 0 0 -53 45 25 8 23 17.7 50 357 -3 -53 49 28 -53 41 22 -53 51 25 -53 39 26 0.69 162 0 0 -53 19 44 8 23 25.7 51 355 -4 -53 23 48 -53 15 41 -53 25 46 -53 13 44 0.69 163 0 0 -52 53 30 8 23 33.8 51 354 -5 -52 57 35 -52 49 25 -52 59 33 -52 47 28 0.70 164 0 0 -52 26 41 8 23 42.1 52 352 -6 -52 30 47 -52 22 35 -52 32 45 -52 20 37 0.70 165 0 0 -51 59 18 8 23 50.5 52 350 -6 -52 3 25 -51 55 11 -52 5 23 -51 53 13 0.70 166 0 0 -51 31 20 8 23 59.1 52 349 -7 -51 35 28 -51 27 13 -51 37 27 -51 25 14 0.70 167 0 0 -51 2 49 8 24 7.9 53 347 -8 -51 6 58 -50 58 40 -51 8 57 -50 56 41 0.70 168 0 0 -50 33 43 8 24 16.8 53 345 -9 -50 37 53 -50 29 34 -50 39 53 -50 27 34 0.70 169 0 0 -50 4 4 8 24 25.9 53 343 -10 -50 8 14 -49 59 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44 0.75 -130 0 0 -13 50 52 8 34 18.9 19 259 -66 -13 54 34 -13 47 11 -13 56 20 -13 45 25 0.75 -129 0 0 -13 24 9 8 34 23.5 18 259 -66 -13 27 50 -13 20 29 -13 29 36 -13 18 43 0.75 -128 0 0 -12 58 4 8 34 27.9 17 259 -66 -13 1 44 -12 54 25 -13 3 29 -12 52 40 0.75 -127 0 0 -12 32 38 8 34 32.1 16 259 -66 -12 36 16 -12 28 59 -12 38 1 -12 27 15 0.75 -126 0 0 -12 7 50 8 34 35.9 15 258 -66 -12 11 27 -12 4 12 -12 13 12 -12 2 28 0.75 -125 0 0 -11 43 41 8 34 39.5 14 258 -67 -11 47 17 -11 40 4 -11 49 2 -11 38 20 0.76 -124 0 0 -11 20 10 8 34 42.8 13 258 -67 -11 23 46 -11 16 35 -11 25 30 -11 14 51 0.76 -123 0 0 -10 57 19 8 34 45.9 11 258 -67 -11 0 54 -10 53 45 -11 2 38 -10 52 1 0.76 -122 0 0 -10 35 8 8 34 48.6 10 257 -66 -10 38 42 -10 31 34 -10 40 25 -10 29 51 0.77 -121 0 0 -10 13 35 8 34 51.1 9 257 -66 -10 17 8 -10 10 2 -10 18 51 -10 8 20 0.77 -120 0 0 - 9 52 42 8 34 53.3 8 257 -66 - 9 56 15 - 9 49 10 - 9 57 57 - 9 47 28 0.78 -119 0 0 - 9 32 29 8 34 55.3 7 257 -66 - 9 36 1 - 9 28 58 - 9 37 42 - 9 27 16 0.78 -118 0 0 - 9 12 55 8 34 57.0 6 257 -66 - 9 16 26 - 9 9 25 - 9 18 8 - 9 7 43 0.80 -117 0 0 - 8 54 1 8 34 58.4 5 256 -65 - 8 57 31 - 8 50 31 - 8 59 12 - 8 48 50 0.81 -116 0 0 - 8 35 47 8 34 59.6 4 256 -65 - 8 39 16 - 8 32 17 - 8 40 57 - 8 30 37 0.83 -115 0 0 - 8 18 12 8 35 0.5 3 256 -64 - 8 21 41 - 8 14 43 - 8 23 21 - 8 13 3 0.87 -114 0 0 - 8 1 17 8 35 1.1 2 256 -64 - 8 4 45 - 7 57 49 - 8 6 25 - 7 56 9 0.94 -113 0 0 - 7 45 1 8 35 1.5 1 256 -63 - 7 48 29 - 7 41 34 - 7 50 8 - 7 39 54 1.16 -112 0 0 - 7 29 25 8 35 1.6 0 256 -63 - 7 32 52 - 7 25 59 - 7 34 31 - 7 24 19 14.03 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 5769-00156-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 55 26.7118 DE: -14 14 55.349 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 55 26.7117 DE: -14 14 55.350 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.5 * B mag [mag]: 11.1 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (12243) 1988 RD1 asteroid class: approx. diameter [km]: 10 approx. diameter ["]: 0.006 distance from Earth [AU]: 2.28640 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#50 date of fit: 2023 Apr 25 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", 63.283° remarks: * orbital elements for (12243)1988 RD1 : Mean anomaly = 338.1906265681 deg Arg. of pericenter = 41.7403527897 deg Long. of node = 318.1156077242 deg Inclination = 9.7112677730 deg Eccentricity = 0.1013410932 Semimajor axis = 2.9990123668 AU Perihelion dist = 2.6950891749 AU Mag: H = 12.97, G = 0.15 Epoch of elements : MJD 60603.35154471 TDT (2024 Oct 20.3515) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr25,1.01,2024,10,20,8.437087,0.262252,-0.508762,4.966778,2.558502,0.005350,0.001461,0.000000,0.000000 158.3558,-14.1542,49.63,-10.56,False TYC 5769-00156-1,20.92408664,-14.2487080,11.09,10.46,10.12,0.1,0,,20.94701046,-14.1541501,7.50,7.39,0,0,0 12243,1988 RD1,17.96,10.019,2.2864,0,0,1.314,9.85,,1.0,0 0,338.1239,2024,10,20,41.7404,318.1156,9.7113,0.10134,2.99901,2.69509,12.97,5.0,0.15 1.240,0.0233,0.0014,63,0.0014,Known errors,0.97,0,-1,-1 20241020_0156-1,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:32 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org