IOTA/IOTA-ES occultation update for (396) Aeolia / UCAC4 341-120995 event on 2024 Oct 23, 12:10 UT Visible from Summary ------- On 2024 Oct 23 UT, the 38.955 km diameter asteroid (396) Aeolia will occult a 12.0 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 3.21 mag to 15.10 mag (the magnitude of the asteroid) for at most 1.110 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 23, 12:07 - 2024 Oct 23, 12:13 * geocentric midpoint of event [JD]: 2460607.00731016 * magnitude of target star: 11.95 * magnitude drop [mag]: 3.21 * estimated maximum duration [s]: 1.110 * Moon: 59 % sunlit, 160° distance * Sun: 60° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 45 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.002", 88°) * approx speed of asteroid's shadow [km/s]: 35.0259 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 341-120995 by 396 Aeolia on 2024 Oct 23 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 -29 29 30 12 7 55.6 0 115 49 -29 43 11 -29 15 51 -29 45 51 -29 13 12 .... - 45 0 0 -29 54 25 12 7 55.7 1 115 49 -30 8 7 -29 40 46 -30 10 47 -29 38 7 0.52 - 44 0 0 -30 19 20 12 7 55.8 2 114 50 -30 33 2 -30 5 40 -30 35 42 -30 3 1 0.55 - 43 0 0 -30 44 14 12 7 56.0 3 114 51 -30 57 56 -30 30 34 -31 0 36 -30 27 54 0.57 - 42 0 0 -31 9 6 12 7 56.2 4 113 51 -31 22 49 -30 55 25 -31 25 29 -30 52 46 0.58 - 41 0 0 -31 33 55 12 7 56.5 5 113 52 -31 47 39 -31 20 14 -31 50 19 -31 17 35 0.58 - 40 0 0 -31 58 41 12 7 56.9 6 112 53 -32 12 25 -31 45 0 -32 15 5 -31 42 21 0.59 - 39 0 0 -32 23 24 12 7 57.3 7 111 53 -32 37 8 -32 9 42 -32 39 48 -32 7 3 0.59 - 38 0 0 -32 48 2 12 7 57.7 8 111 54 -33 1 46 -32 34 20 -33 4 26 -32 31 41 0.59 - 37 0 0 -33 12 35 12 7 58.3 9 110 54 -33 26 19 -32 58 53 -33 28 59 -32 56 14 0.59 - 36 0 0 -33 37 2 12 7 58.8 10 110 55 -33 50 46 -33 23 20 -33 53 27 -33 20 41 0.59 - 35 0 0 -34 1 23 12 7 59.4 11 109 55 -34 15 7 -33 47 41 -34 17 48 -33 45 2 0.60 - 34 0 0 -34 25 37 12 8 0.1 12 109 56 -34 39 21 -34 11 56 -34 42 2 -34 9 16 0.60 - 33 0 0 -34 49 44 12 8 0.8 13 108 56 -35 3 28 -34 36 2 -35 6 8 -34 33 23 0.60 - 32 0 0 -35 13 43 12 8 1.6 13 107 57 -35 27 26 -35 0 1 -35 30 7 -34 57 22 0.60 - 31 0 0 -35 37 32 12 8 2.4 14 107 57 -35 51 16 -35 23 51 -35 53 56 -35 21 12 0.60 - 30 0 0 -36 1 13 12 8 3.3 15 106 57 -36 14 56 -35 47 32 -36 17 36 -35 44 53 0.60 - 29 0 0 -36 24 44 12 8 4.2 16 106 58 -36 38 27 -36 11 3 -36 41 7 -36 8 24 0.60 - 28 0 0 -36 48 5 12 8 5.1 17 105 58 -37 1 47 -36 34 25 -37 4 27 -36 31 45 0.60 - 27 0 0 -37 11 15 12 8 6.1 18 104 58 -37 24 56 -36 57 35 -37 27 36 -36 54 56 0.60 - 26 0 0 -37 34 13 12 8 7.2 19 104 59 -37 47 54 -37 20 34 -37 50 34 -37 17 55 0.60 - 25 0 0 -37 57 0 12 8 8.3 20 103 59 -38 10 41 -37 43 22 -38 13 20 -37 40 43 0.60 - 24 0 0 -38 19 35 12 8 9.4 21 102 59 -38 33 15 -38 5 57 -38 35 54 -38 3 18 0.60 - 23 0 0 -38 41 57 12 8 10.5 21 102 59 -38 55 36 -38 28 20 -38 58 15 -38 25 41 0.60 - 22 0 0 -39 4 6 12 8 11.7 22 101 59 -39 17 44 -38 50 29 -39 20 23 -38 47 51 0.60 - 21 0 0 -39 26 1 12 8 13.0 23 100 59 -39 39 39 -39 12 26 -39 42 18 -39 9 48 0.60 - 20 0 0 -39 47 43 12 8 14.2 24 99 59 -40 1 19 -39 34 8 -40 3 58 -39 31 30 0.60 - 19 0 0 -40 9 10 12 8 15.5 25 99 59 -40 22 46 -39 55 36 -40 25 24 -39 52 59 0.60 - 18 0 0 -40 30 23 12 8 16.9 25 98 59 -40 43 58 -40 16 50 -40 46 36 -40 14 12 0.60 - 17 0 0 -40 51 20 12 8 18.2 26 97 59 -41 4 54 -40 37 49 -41 7 33 -40 35 11 0.60 - 16 0 0 -41 12 3 12 8 19.6 27 96 59 -41 25 36 -40 58 32 -41 28 14 -40 55 55 0.60 - 15 0 0 -41 32 30 12 8 21.0 28 96 59 -41 46 1 -41 19 0 -41 48 39 -41 16 23 0.60 - 14 0 0 -41 52 41 12 8 22.5 29 95 59 -42 6 11 -41 39 12 -42 8 49 -41 36 36 0.60 - 13 0 0 -42 12 36 12 8 24.0 29 94 59 -42 26 5 -41 59 8 -42 28 42 -41 56 32 0.60 - 12 0 0 -42 32 14 12 8 25.5 30 93 59 -42 45 42 -42 18 48 -42 48 19 -42 16 12 0.60 - 11 0 0 -42 51 36 12 8 27.0 31 92 59 -43 5 3 -42 38 11 -43 7 39 -42 35 35 0.60 - 10 0 0 -43 10 41 12 8 28.6 32 91 58 -43 24 6 -42 57 17 -43 26 43 -42 54 42 0.60 - 9 0 0 -43 29 29 12 8 30.1 32 90 58 -43 42 53 -43 16 6 -43 45 29 -43 13 31 0.60 - 8 0 0 -43 47 59 12 8 31.7 33 90 58 -44 1 22 -43 34 38 -44 3 58 -43 32 3 0.60 - 7 0 0 -44 6 12 12 8 33.3 34 89 58 -44 19 33 -43 52 53 -44 22 9 -43 50 18 0.60 - 6 0 0 -44 24 8 12 8 35.0 35 88 57 -44 37 28 -44 10 50 -44 40 3 -44 8 15 0.60 - 5 0 0 -44 41 45 12 8 36.6 35 87 57 -44 55 4 -44 28 29 -44 57 39 -44 25 54 0.60 - 4 0 0 -44 59 5 12 8 38.3 36 86 57 -45 12 22 -44 45 50 -45 14 57 -44 43 16 0.60 - 3 0 0 -45 16 7 12 8 40.0 37 85 56 -45 29 22 -45 2 53 -45 31 57 -45 0 19 0.60 - 2 0 0 -45 32 50 12 8 41.7 37 84 56 -45 46 5 -45 19 38 -45 48 39 -45 17 5 0.60 - 1 0 0 -45 49 16 12 8 43.4 38 83 56 -46 2 28 -45 36 5 -46 5 3 -45 33 32 0.60 0 0 0 -46 5 23 12 8 45.1 39 82 55 -46 18 34 -45 52 14 -46 21 8 -45 49 41 0.60 1 0 0 -46 21 12 12 8 46.9 39 81 55 -46 34 21 -46 8 4 -46 36 55 -46 5 31 0.60 2 0 0 -46 36 42 12 8 48.6 40 80 54 -46 49 50 -46 23 36 -46 52 23 -46 21 3 0.60 3 0 0 -46 51 54 12 8 50.4 41 79 54 -47 5 0 -46 38 49 -47 7 33 -46 36 17 0.60 4 0 0 -47 6 47 12 8 52.2 41 78 54 -47 19 52 -46 53 44 -47 22 25 -46 51 12 0.60 5 0 0 -47 21 21 12 8 54.0 42 77 53 -47 34 25 -47 8 20 -47 36 57 -47 5 48 0.60 6 0 0 -47 35 37 12 8 55.8 42 76 53 -47 48 39 -47 22 37 -47 51 12 -47 20 6 0.60 7 0 0 -47 49 35 12 8 57.6 43 75 52 -48 2 35 -47 36 36 -48 5 7 -47 34 5 0.60 8 0 0 -48 3 14 12 8 59.4 44 73 52 -48 16 13 -47 50 17 -48 18 44 -47 47 46 0.60 9 0 0 -48 16 34 12 9 1.2 44 72 51 -48 29 31 -48 3 38 -48 32 2 -48 1 8 0.60 10 0 0 -48 29 35 12 9 3.1 45 71 51 -48 42 31 -48 16 41 -48 45 2 -48 14 11 0.60 11 0 0 -48 42 18 12 9 4.9 45 70 50 -48 55 13 -48 29 26 -48 57 43 -48 26 56 0.60 12 0 0 -48 54 43 12 9 6.7 46 69 50 -49 7 36 -48 41 52 -49 10 6 -48 39 22 0.60 13 0 0 -49 6 49 12 9 8.6 46 68 49 -49 19 40 -48 53 59 -49 22 10 -48 51 30 0.60 14 0 0 -49 18 36 12 9 10.5 47 66 49 -49 31 26 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12 9 35.0 53 49 42 -51 36 40 -51 11 35 -51 39 6 -51 9 9 0.60 28 0 0 -51 31 40 12 9 36.9 53 47 41 -51 44 12 -51 19 9 -51 46 38 -51 16 44 0.60 29 0 0 -51 38 55 12 9 38.8 54 46 41 -51 51 26 -51 26 26 -51 53 52 -51 24 1 0.60 30 0 0 -51 45 53 12 9 40.7 54 44 40 -51 58 23 -51 33 25 -52 0 49 -51 31 0 0.60 31 0 0 -51 52 33 12 9 42.6 54 43 40 -52 5 2 -51 40 6 -52 7 28 -51 37 41 0.60 32 0 0 -51 58 56 12 9 44.5 55 41 39 -52 11 24 -51 46 29 -52 13 49 -51 44 5 0.60 33 0 0 -52 5 1 12 9 46.4 55 40 39 -52 17 28 -51 52 36 -52 19 53 -51 50 11 0.60 34 0 0 -52 10 49 12 9 48.4 55 38 38 -52 23 15 -51 58 24 -52 25 40 -51 56 0 0.60 35 0 0 -52 16 19 12 9 50.3 56 36 38 -52 28 44 -52 3 55 -52 31 9 -52 1 31 0.60 36 0 0 -52 21 32 12 9 52.2 56 35 37 -52 33 56 -52 9 9 -52 36 21 -52 6 45 0.60 37 0 0 -52 26 28 12 9 54.1 56 33 36 -52 38 51 -52 14 6 -52 41 16 -52 11 42 0.60 38 0 0 -52 31 6 12 9 56.0 56 32 36 -52 43 29 -52 18 45 -52 45 54 -52 16 21 0.60 39 0 0 -52 35 28 12 9 57.9 57 30 35 -52 47 50 -52 23 7 -52 50 14 -52 20 43 0.60 40 0 0 -52 39 32 12 9 59.8 57 28 35 -52 51 53 -52 27 12 -52 54 18 -52 24 48 0.60 41 0 0 -52 43 19 12 10 1.8 57 27 34 -52 55 40 -52 31 0 -52 58 4 -52 28 36 0.60 42 0 0 -52 46 49 12 10 3.7 57 25 34 -52 59 10 -52 34 30 -53 1 34 -52 32 7 0.60 43 0 0 -52 50 2 12 10 5.6 57 23 33 -53 2 22 -52 37 44 -53 4 46 -52 35 21 0.60 44 0 0 -52 52 58 12 10 7.5 58 21 33 -53 5 18 -52 40 41 -53 7 42 -52 38 17 0.60 45 0 0 -52 55 38 12 10 9.4 58 20 32 -53 7 57 -52 43 20 -53 10 20 -52 40 57 0.60 46 0 0 -52 58 0 12 10 11.4 58 18 31 -53 10 19 -52 45 43 -53 12 42 -52 43 20 0.60 47 0 0 -53 0 6 12 10 13.3 58 16 31 -53 12 24 -52 47 49 -53 14 47 -52 45 26 0.60 48 0 0 -53 1 54 12 10 15.2 58 14 30 -53 14 12 -52 49 38 -53 16 36 -52 47 15 0.60 49 0 0 -53 3 26 12 10 17.1 58 13 30 -53 15 44 -52 51 10 -53 18 7 -52 48 47 0.61 50 0 0 -53 4 41 12 10 19.1 58 11 29 -53 16 59 -52 52 25 -53 19 22 -52 50 2 0.61 51 0 0 -53 5 39 12 10 21.0 59 9 29 -53 17 57 -52 53 23 -53 20 20 -52 51 1 0.61 52 0 0 -53 6 21 12 10 22.9 59 7 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0 12 12 56.8 18 256 -32 -36 12 44 -35 45 19 -36 15 24 -35 42 40 0.63 139 0 0 -35 35 18 12 12 57.8 17 255 -33 -35 49 1 -35 21 36 -35 51 41 -35 18 57 0.63 140 0 0 -35 11 26 12 12 58.8 17 254 -34 -35 25 10 -34 57 44 -35 27 50 -34 55 5 0.63 141 0 0 -34 47 25 12 12 59.8 16 254 -35 -35 1 9 -34 33 43 -35 3 50 -34 31 4 0.63 142 0 0 -34 23 17 12 13 0.7 15 253 -36 -34 37 1 -34 9 35 -34 39 41 -34 6 55 0.64 143 0 0 -33 59 1 12 13 1.5 14 253 -36 -34 12 45 -33 45 19 -34 15 25 -33 42 39 0.64 144 0 0 -33 34 38 12 13 2.3 13 252 -37 -33 48 22 -33 20 56 -33 51 3 -33 18 17 0.64 145 0 0 -33 10 9 12 13 3.1 12 252 -38 -33 23 53 -32 56 27 -33 26 33 -32 53 47 0.64 146 0 0 -32 45 34 12 13 3.8 11 251 -39 -32 59 18 -32 31 52 -33 1 58 -32 29 13 0.65 147 0 0 -32 20 54 12 13 4.4 10 250 -40 -32 34 38 -32 7 13 -32 37 18 -32 4 33 0.65 148 0 0 -31 56 10 12 13 5.0 9 250 -40 -32 9 54 -31 42 29 -32 12 34 -31 39 49 0.66 149 0 0 -31 31 22 12 13 5.5 8 249 -41 -31 45 6 -31 17 41 -31 47 46 -31 15 2 0.66 150 0 0 -31 6 31 12 13 6.0 7 249 -42 -31 20 14 -30 52 50 -31 22 54 -30 50 11 0.67 151 0 0 -30 41 38 12 13 6.4 6 248 -43 -30 55 20 -30 27 57 -30 58 0 -30 25 18 0.68 152 0 0 -30 16 43 12 13 6.8 5 248 -44 -30 30 25 -30 3 3 -30 33 5 -30 0 24 0.69 153 0 0 -29 51 47 12 13 7.1 4 247 -44 -30 5 28 -29 38 7 -30 8 8 -29 35 28 0.71 154 0 0 -29 26 50 12 13 7.4 3 247 -45 -29 40 31 -29 13 11 -29 43 11 -29 10 32 0.74 155 0 0 -29 1 54 12 13 7.6 2 246 -46 -29 15 34 -28 48 16 -29 18 14 -28 45 37 0.79 156 0 0 -28 36 58 12 13 7.7 2 246 -47 -28 50 38 -28 23 21 -28 53 18 -28 20 42 0.92 157 0 0 -28 12 5 12 13 7.7 1 245 -47 -28 25 44 -27 58 28 -28 28 23 -27 55 50 1.49 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 341-120995 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 02 23.8061 DE: -21 55 31.880 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 02 23.8061 DE: -21 55 31.880 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (396) Aeolia asteroid class: approx. diameter [km]: 39 approx. diameter ["]: 0.020 distance from Earth [AU]: 2.65270 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): 0.013", 0.002", 88.364° remarks: * orbital elements for (396)Aeolia : Mean anomaly = 15.3345695983 deg Arg. of pericenter = 21.2498656028 deg Long. of node = 249.8657736741 deg Inclination = 2.5493793782 deg Eccentricity = 0.1593732396 Semimajor axis = 2.7419732948 AU Perihelion dist = 2.3049761278 AU Mag: H = 10.10, G = 0.15 Epoch of elements : MJD 60606.50730992 TDT (2024 Oct 23.5073) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,1.11,2024,10,23,12.175444,0.006122,-0.513781,19.767946,0.256104,0.004887,0.000102,-0.000001,0.000000 55.9335,-21.9261,-6.57,-11.68,False UCAC4 341-120995,18.03994620,-21.9255223,12.44,11.95,11.69,0.0,0,,18.06458561,-21.9260911,3.21,3.03,0,0,0 396,Aeolia,15.10,38.955,2.6527,0,0,4.710,0.85,,2.4,0 0,15.2244,2024,10,23,21.2499,249.8658,2.5494,0.15937,2.74197,2.30498,10.09,5.0,0.15 1.097,0.0127,0.0020,88,0.0020,Known errors,0.96,0,-1,-1 20241023_120995,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:42 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org