IOTA/IOTA-ES occultation update for (4292) Aoba / UCAC4 325-143049 event on 2024 Oct 05, 18:02 UT Visible from Summary ------- On 2024 Oct 05 UT, the 25.26 km diameter asteroid (4292) Aoba will occult a 11.4 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 6.52 mag to 17.95 mag (the magnitude of the asteroid) for at most 1.190 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 05, 17:57 - 2024 Oct 05, 18:07 * geocentric midpoint of event [JD]: 2460589.25186862 * magnitude of target star: 11.43 * magnitude drop [mag]: 6.52 * estimated maximum duration [s]: 1.190 * Moon: 7 % sunlit, 50° distance * Sun: 81° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 26 * 1 sigma uncertainty interval [path widths]: +/- 0.23 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.003", 85°) * approx speed of asteroid's shadow [km/s]: 21.2117 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 325-143049 by 4292 Aoba on 2024 Oct 5 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 - 96 0 0 6 49 19 17 57 49.7 1 115 78 6 41 32 6 57 6 6 38 0 7 0 39 .... - 95 0 0 6 21 13 17 57 49.8 2 115 78 6 13 27 6 29 0 6 9 55 6 32 32 -0.08 - 94 0 0 5 53 17 17 57 50.0 3 116 79 5 45 31 6 1 3 5 42 0 6 4 35 -0.14 - 93 0 0 5 25 32 17 57 50.4 4 116 79 5 17 47 5 33 18 5 14 16 5 36 49 -0.17 - 92 0 0 4 57 59 17 57 50.8 5 116 80 4 50 14 5 5 44 4 46 44 5 9 15 -0.18 - 91 0 0 4 30 38 17 57 51.4 6 116 80 4 22 54 4 38 22 4 19 23 4 41 53 -0.19 - 90 0 0 4 3 29 17 57 52.1 7 116 81 3 55 46 4 11 13 3 52 16 4 14 43 -0.20 - 89 0 0 3 36 35 17 57 52.9 8 116 81 3 28 52 3 44 18 3 25 23 3 47 48 -0.21 - 88 0 0 3 9 55 17 57 53.8 9 116 81 3 2 13 3 17 37 2 58 43 3 21 6 -0.21 - 87 0 0 2 43 29 17 57 54.8 11 116 80 2 35 48 2 51 11 2 32 19 2 54 40 -0.21 - 86 0 0 2 17 20 17 57 55.9 12 116 80 2 9 39 2 25 0 2 6 11 2 28 29 -0.22 - 85 0 0 1 51 26 17 57 57.2 13 116 80 1 43 47 1 59 6 1 40 18 2 2 35 -0.22 - 84 0 0 1 25 50 17 57 58.5 14 116 79 1 18 11 1 33 29 1 14 43 1 36 57 -0.22 - 83 0 0 1 0 31 17 58 0.0 15 116 79 0 52 53 1 8 9 0 49 25 1 11 37 -0.22 - 82 0 0 0 35 29 17 58 1.6 16 116 78 0 27 52 0 43 7 0 24 25 0 46 34 -0.22 - 81 0 0 0 10 47 17 58 3.2 17 116 77 0 3 10 0 18 23 - 0 0 16 0 21 51 -0.22 - 80 0 0 - 0 13 37 17 58 5.0 18 116 77 - 0 21 12 - 0 6 1 - 0 24 39 - 0 2 34 -0.23 - 79 0 0 - 0 37 41 17 58 6.9 19 116 76 - 0 45 15 - 0 30 6 - 0 48 42 - 0 26 39 -0.23 - 78 0 0 - 1 1 24 17 58 8.8 20 116 75 - 1 8 58 - 0 53 50 - 1 12 24 - 0 50 24 -0.23 - 77 0 0 - 1 24 48 17 58 10.9 21 116 74 - 1 32 21 - 1 17 14 - 1 35 46 - 1 13 49 -0.23 - 76 0 0 - 1 47 50 17 58 13.1 22 116 73 - 1 55 22 - 1 40 17 - 1 58 47 - 1 36 52 -0.23 - 75 0 0 - 2 10 30 17 58 15.4 23 116 72 - 2 18 2 - 2 2 59 - 2 21 26 - 1 59 34 -0.23 - 74 0 0 - 2 32 49 17 58 17.7 25 116 71 - 2 40 19 - 2 25 18 - 2 43 44 - 2 21 54 -0.23 - 73 0 0 - 2 54 45 17 58 20.2 26 116 70 - 3 2 15 - 2 47 16 - 3 5 39 - 2 43 52 -0.23 - 72 0 0 - 3 16 19 17 58 22.7 27 116 69 - 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5 47 7 18 4 59.7 59 229 -17 - 5 54 30 - 5 39 44 - 5 57 50 - 5 36 23 -0.25 15 0 0 - 5 28 30 18 5 4.6 58 230 -19 - 5 35 53 - 5 21 6 - 5 39 14 - 5 17 45 -0.25 16 0 0 - 5 9 27 18 5 9.4 57 230 -20 - 5 16 51 - 5 2 2 - 5 20 13 - 4 58 40 -0.25 17 0 0 - 4 49 58 18 5 14.2 56 231 -21 - 4 57 23 - 4 42 33 - 5 0 45 - 4 39 11 -0.24 18 0 0 - 4 30 4 18 5 19.0 55 231 -22 - 4 37 30 - 4 22 38 - 4 40 53 - 4 19 15 -0.24 19 0 0 - 4 9 46 18 5 23.7 54 232 -23 - 4 17 13 - 4 2 18 - 4 20 35 - 3 58 55 -0.24 20 0 0 - 3 49 2 18 5 28.3 53 232 -24 - 3 56 30 - 3 41 34 - 3 59 53 - 3 38 11 -0.24 21 0 0 - 3 27 55 18 5 32.9 52 233 -25 - 3 35 24 - 3 20 26 - 3 38 47 - 3 17 2 -0.24 22 0 0 - 3 6 23 18 5 37.5 51 233 -26 - 3 13 53 - 2 58 53 - 3 17 17 - 2 55 29 -0.24 23 0 0 - 2 44 28 18 5 42.0 50 233 -27 - 2 51 59 - 2 36 58 - 2 55 23 - 2 33 33 -0.24 24 0 0 - 2 22 10 18 5 46.4 49 234 -28 - 2 29 42 - 2 14 39 - 2 33 7 - 2 11 14 -0.24 25 0 0 - 1 59 30 18 5 50.8 48 234 -29 - 2 7 2 - 1 51 57 - 2 10 27 - 1 48 32 -0.24 26 0 0 - 1 36 27 18 5 55.1 47 234 -30 - 1 44 0 - 1 28 53 - 1 47 25 - 1 25 27 -0.24 27 0 0 - 1 13 2 18 5 59.3 46 234 -31 - 1 20 36 - 1 5 27 - 1 24 2 - 1 2 1 -0.24 28 0 0 - 0 49 15 18 6 3.5 44 235 -32 - 0 56 50 - 0 41 40 - 1 0 17 - 0 38 14 -0.24 29 0 0 - 0 25 8 18 6 7.6 43 235 -33 - 0 32 44 - 0 17 32 - 0 36 11 - 0 14 5 -0.24 30 0 0 - 0 0 41 18 6 11.6 42 235 -34 - 0 8 17 0 6 56 - 0 11 45 0 10 24 -0.24 31 0 0 0 24 7 18 6 15.5 41 235 -35 0 16 29 0 31 45 0 13 2 0 35 12 -0.24 32 0 0 0 49 14 18 6 19.4 40 236 -36 0 41 35 0 56 52 0 38 7 1 0 20 -0.24 33 0 0 1 14 39 18 6 23.2 39 236 -38 1 7 0 1 22 19 1 3 32 1 25 47 -0.24 34 0 0 1 40 23 18 6 26.9 38 236 -39 1 32 43 1 48 3 1 29 14 1 51 32 -0.24 35 0 0 2 6 24 18 6 30.6 37 236 -40 1 58 43 2 14 5 1 55 14 2 17 35 -0.24 36 0 0 2 32 43 18 6 34.1 36 236 -41 2 25 1 2 40 24 2 21 31 2 43 54 -0.24 37 0 0 2 59 17 18 6 37.5 35 236 -42 2 51 35 3 7 0 2 48 5 3 10 30 -0.24 38 0 0 3 26 8 18 6 40.9 34 237 -43 3 18 24 3 33 51 3 14 54 3 37 21 -0.24 39 0 0 3 53 13 18 6 44.2 33 237 -44 3 45 29 4 0 57 3 41 59 4 4 28 -0.24 40 0 0 4 20 33 18 6 47.4 32 237 -45 4 12 48 4 28 17 4 9 17 4 31 49 -0.24 41 0 0 4 48 6 18 6 50.4 30 237 -46 4 40 21 4 55 52 4 36 50 4 59 23 -0.24 42 0 0 5 15 52 18 6 53.4 29 237 -47 5 8 6 5 23 38 5 4 35 5 27 10 -0.24 43 0 0 5 43 51 18 6 56.3 28 238 -48 5 36 4 5 51 37 5 32 32 5 55 9 -0.24 44 0 0 6 12 0 18 6 59.1 27 238 -49 6 4 13 6 19 48 6 0 41 6 23 20 -0.24 45 0 0 6 40 21 18 7 1.8 26 238 -50 6 32 33 6 48 9 6 29 1 6 51 41 -0.24 46 0 0 7 8 51 18 7 4.3 25 238 -51 7 1 3 7 16 40 6 57 31 7 20 13 -0.24 47 0 0 7 37 31 18 7 6.8 24 238 -52 7 29 42 7 45 20 7 26 9 7 48 53 -0.24 48 0 0 8 6 19 18 7 9.2 23 238 -53 7 58 29 8 14 8 7 54 57 8 17 42 -0.24 49 0 0 8 35 14 18 7 11.4 22 239 -54 8 27 24 8 43 4 8 23 51 8 46 38 -0.24 50 0 0 9 4 16 18 7 13.6 21 239 -55 8 56 26 9 12 7 8 52 53 9 15 41 -0.24 51 0 0 9 33 25 18 7 15.6 19 239 -56 9 25 34 9 41 15 9 22 0 9 44 49 -0.24 52 0 0 10 2 38 18 7 17.6 18 239 -57 9 54 47 10 10 29 9 51 13 10 14 3 -0.24 53 0 0 10 31 55 18 7 19.4 17 239 -58 10 24 4 10 39 47 10 20 30 10 43 21 -0.24 54 0 0 11 1 16 18 7 21.1 16 240 -59 10 53 24 11 9 8 10 49 51 11 12 42 -0.24 55 0 0 11 30 40 18 7 22.7 15 240 -59 11 22 48 11 38 32 11 19 14 11 42 6 -0.24 56 0 0 12 0 5 18 7 24.2 14 240 -60 11 52 13 12 7 57 11 48 39 12 11 32 -0.24 57 0 0 12 29 31 18 7 25.5 13 240 -61 12 21 39 12 37 24 12 18 5 12 40 58 -0.24 58 0 0 12 58 58 18 7 26.8 12 241 -62 12 51 5 13 6 50 12 47 31 13 10 25 -0.24 59 0 0 13 28 23 18 7 27.9 11 241 -63 13 20 31 13 36 16 13 16 57 13 39 51 -0.24 60 0 0 13 57 48 18 7 28.9 10 241 -64 13 49 55 14 5 41 13 46 21 14 9 15 -0.24 61 0 0 14 27 10 18 7 29.9 8 241 -64 14 19 17 14 35 3 14 15 43 14 38 37 -0.24 62 0 0 14 56 28 18 7 30.7 7 242 -65 14 48 36 15 4 21 14 45 1 15 7 56 -0.23 63 0 0 15 25 43 18 7 31.4 6 242 -66 15 17 51 15 33 36 15 14 16 15 37 11 -0.23 64 0 0 15 54 54 18 7 31.9 5 242 -67 15 47 1 16 2 47 15 43 27 16 6 21 -0.23 65 0 0 16 23 58 18 7 32.4 4 242 -67 16 16 6 16 31 51 16 12 32 16 35 26 -0.23 66 0 0 16 52 57 18 7 32.8 3 243 -68 16 45 5 17 0 50 16 41 30 17 4 24 -0.23 67 0 0 17 21 49 18 7 33.0 2 243 -68 17 13 56 17 29 41 17 10 22 17 33 16 -0.22 68 0 0 17 50 32 18 7 33.2 1 243 -69 17 42 40 17 58 25 17 39 6 18 1 59 -0.20 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 325-143049 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 16 20.5198 DE: -25 02 58.745 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 16 20.5197 DE: -25 02 58.745 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.4 * B mag [mag]: 11.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4292) Aoba asteroid class: approx. diameter [km]: 25 approx. diameter ["]: 0.012 distance from Earth [AU]: 2.86650 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 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): 0.011", 0.003", 84.705° remarks: * orbital elements for (4292)Aoba : Mean anomaly = 185.7421124406 deg Arg. of pericenter = 147.0438825727 deg Long. of node = 321.4348556658 deg Inclination = 3.5496950470 deg Eccentricity = 0.0495291133 Semimajor axis = 2.7498598991 AU Perihelion dist = 2.6136617767 AU Mag: H = 12.36, G = 0.15 Epoch of elements : MJD 60588.75186841 TDT (2024 Oct 05.7519) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr24,1.19,2024,10,5,18.044847,-0.025889,0.239494,11.903421,1.283913,0.005727,0.000152,0.000000,0.000000 -11.1105,-25.0422,-93.62,-5.13,False UCAC4 325-143049,18.27236663,-25.0496514,11.78,11.43,11.24,0.0,0,,18.29767662,-25.0422380,6.52,6.26,0,0,0 4292,Aoba,17.95,25.260,2.8665,0,0,2.687,3.94,,1.8,0 0,185.5796,2024,10,5,147.0439,321.4349,3.5497,0.04953,2.74986,2.61366,12.36,5.0,0.15 1.227,0.0107,0.0028,85,0.0028,Known errors,0.59,0,-1,-1 20241005_143049,60140.61 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:41 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org