IOTA/IOTA-ES occultation update for (396) Aeolia / HIP 43360 event on 2023 Apr 25, 11:34 UT Visible from Australia Summary ------- On 2023 Apr 25 UT, the 38.9099282437578 km diameter asteroid (396) Aeolia will occult a 8.4 mag star in the constellation Cancer for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 7.17 mag to 15.57 mag (the magnitude of the asteroid) for at most 3.460 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: 2023 Apr 25, 11:25 - 2023 Apr 25, 11:42 * geocentric midpoint of event [JD]: 2460059.98213062 * magnitude of target star: 8.40 * magnitude drop [mag]: 7.17 * estimated maximum duration [s]: 3.460 * Moon: 28 % sunlit, 33° distance * Sun: 96° distance * rough path description: Australia Additional comments ------------------- wide double star The occultation path -------------------- * approximate projected width [km]: 45 * 1 sigma uncertainty interval [path widths]: +/- 0.16 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.003", 106°) * approx speed of asteroid's shadow [km/s]: 11.3004 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 43360 by 396 Aeolia on 2023 Apr 25 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 23 0 0 -17 34 4 11 25 59.9 0 74 56 -17 46 33 -17 21 36 -17 50 26 -17 17 44 .... 24 0 0 -17 18 16 11 26 0.0 1 74 56 -17 30 44 -17 5 49 -17 34 37 -17 1 57 0.21 25 0 0 -17 2 41 11 26 0.3 2 74 55 -17 15 9 -16 50 15 -17 19 2 -16 46 24 0.36 26 0 0 -16 47 21 11 26 0.8 3 74 55 -16 59 48 -16 34 56 -17 3 40 -16 31 4 0.41 27 0 0 -16 32 15 11 26 1.5 4 73 55 -16 44 41 -16 19 51 -16 48 33 -16 15 59 0.44 28 0 0 -16 17 24 11 26 2.4 5 73 55 -16 29 50 -16 5 0 -16 33 42 -16 1 9 0.46 29 0 0 -16 2 48 11 26 3.5 6 73 54 -16 15 13 -15 50 25 -16 19 5 -15 46 35 0.47 30 0 0 -15 48 28 11 26 4.8 7 72 54 -16 0 52 -15 36 6 -16 4 44 -15 32 15 0.48 31 0 0 -15 34 24 11 26 6.3 8 72 53 -15 46 47 -15 22 2 -15 50 38 -15 18 12 0.49 32 0 0 -15 20 36 11 26 7.9 9 72 53 -15 32 58 -15 8 15 -15 36 49 -15 4 25 0.50 33 0 0 -15 7 4 11 26 9.8 10 72 52 -15 19 26 -14 54 44 -15 23 16 -14 50 54 0.50 34 0 0 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25 9 -12 53 27 -12 21 21 0.55 97 0 0 -12 47 5 11 33 36.0 61 19 -4 -12 59 21 -12 34 50 -13 3 10 -12 31 2 0.55 98 0 0 -12 57 9 11 33 46.1 61 17 -5 -13 9 25 -12 44 53 -13 13 15 -12 41 5 0.55 99 0 0 -13 7 34 11 33 56.2 61 14 -6 -13 19 51 -12 55 18 -13 23 41 -12 51 29 0.55 100 0 0 -13 18 20 11 34 6.4 61 12 -7 -13 30 38 -13 6 3 -13 34 28 -13 2 14 0.55 101 0 0 -13 29 27 11 34 16.5 61 10 -8 -13 41 46 -13 17 9 -13 45 36 -13 13 20 0.55 102 0 0 -13 40 55 11 34 26.7 61 8 -9 -13 53 15 -13 28 36 -13 57 5 -13 24 47 0.55 103 0 0 -13 52 43 11 34 36.9 61 6 -10 -14 5 4 -13 40 24 -14 8 54 -13 36 34 0.55 104 0 0 -14 4 52 11 34 47.0 61 4 -11 -14 17 13 -13 52 32 -14 21 4 -13 48 42 0.54 105 0 0 -14 17 20 11 34 57.1 61 2 -12 -14 29 43 -14 4 59 -14 33 34 -14 1 9 0.54 106 0 0 -14 30 8 11 35 7.3 61 360 -13 -14 42 32 -14 17 47 -14 46 23 -14 13 57 0.54 107 0 0 -14 43 16 11 35 17.4 61 358 -14 -14 55 40 -14 30 54 -14 59 32 -14 27 3 0.54 108 0 0 -14 56 43 11 35 27.4 60 356 -15 -15 9 7 -14 44 19 -15 12 59 -14 40 29 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0.54 145 0 0 -25 57 39 11 40 41.3 33 311 -51 -26 10 30 -25 44 50 -26 14 30 -25 40 51 0.54 146 0 0 -26 17 59 11 40 47.3 32 310 -52 -26 30 50 -26 5 9 -26 34 50 -26 1 10 0.54 147 0 0 -26 38 19 11 40 53.1 32 310 -53 -26 51 11 -26 25 30 -26 55 11 -26 21 31 0.54 148 0 0 -26 58 41 11 40 58.7 31 309 -53 -27 11 32 -26 45 51 -27 15 32 -26 41 52 0.54 149 0 0 -27 19 2 11 41 4.2 30 308 -54 -27 31 54 -27 6 12 -27 35 54 -27 2 13 0.54 150 0 0 -27 39 23 11 41 9.5 29 308 -55 -27 52 15 -27 26 32 -27 56 15 -27 22 33 0.54 151 0 0 -27 59 42 11 41 14.6 28 307 -56 -28 12 34 -27 46 52 -28 16 35 -27 42 53 0.54 152 0 0 -28 20 0 11 41 19.6 27 307 -56 -28 32 52 -28 7 10 -28 36 53 -28 3 10 0.54 153 0 0 -28 40 16 11 41 24.3 26 306 -57 -28 53 9 -28 27 26 -28 57 9 -28 23 26 0.54 154 0 0 -29 0 30 11 41 29.0 25 305 -58 -29 13 22 -28 47 39 -29 17 23 -28 43 40 0.54 155 0 0 -29 20 40 11 41 33.4 24 305 -59 -29 33 33 -29 7 50 -29 37 33 -29 3 51 0.54 156 0 0 -29 40 47 11 41 37.6 23 304 -59 -29 53 40 -29 27 57 -29 57 40 -29 23 58 0.54 157 0 0 -30 0 51 11 41 41.7 22 304 -60 -30 13 43 -29 48 0 -30 17 43 -29 44 1 0.54 158 0 0 -30 20 49 11 41 45.7 21 303 -60 -30 33 41 -30 7 59 -30 37 42 -30 4 0 0.54 159 0 0 -30 40 43 11 41 49.4 20 302 -61 -30 53 35 -30 27 53 -30 57 35 -30 23 53 0.54 160 0 0 -31 0 31 11 41 53.0 20 302 -62 -31 13 23 -30 47 41 -31 17 24 -30 43 42 0.54 161 0 0 -31 20 14 11 41 56.4 19 301 -62 -31 33 6 -31 7 24 -31 37 6 -31 3 25 0.54 162 0 0 -31 39 51 11 41 59.6 18 301 -63 -31 52 42 -31 27 1 -31 56 42 -31 23 2 0.54 163 0 0 -31 59 21 11 42 2.7 17 300 -63 -32 12 12 -31 46 31 -32 16 12 -31 42 32 0.54 164 0 0 -32 18 44 11 42 5.6 16 299 -64 -32 31 35 -32 5 54 -32 35 35 -32 1 56 0.54 165 0 0 -32 37 59 11 42 8.3 15 299 -64 -32 50 50 -32 25 10 -32 54 50 -32 21 12 0.54 166 0 0 -32 57 7 11 42 10.8 14 298 -64 -33 9 57 -32 44 19 -33 13 57 -32 40 20 0.54 167 0 0 -33 16 7 11 42 13.2 13 298 -65 -33 28 57 -33 3 19 -33 32 56 -32 59 20 0.54 168 0 0 -33 34 58 11 42 15.4 12 297 -65 -33 47 47 -33 22 10 -33 51 47 -33 18 12 0.54 169 0 0 -33 53 40 11 42 17.5 11 297 -65 -34 6 29 -33 40 53 -34 10 29 -33 36 55 0.54 170 0 0 -34 12 14 11 42 19.4 11 296 -66 -34 25 2 -33 59 27 -34 29 1 -33 55 29 0.54 171 0 0 -34 30 37 11 42 21.1 10 295 -66 -34 43 25 -34 17 51 -34 47 25 -34 13 53 0.54 172 0 0 -34 48 51 11 42 22.7 9 295 -66 -35 1 39 -34 36 5 -35 5 38 -34 32 7 0.54 173 0 0 -35 6 55 11 42 24.2 8 294 -66 -35 19 42 -34 54 9 -35 23 41 -34 50 12 0.54 174 0 0 -35 24 48 11 42 25.4 7 294 -66 -35 37 35 -35 12 3 -35 41 33 -35 8 6 0.55 175 0 0 -35 42 31 11 42 26.5 6 293 -66 -35 55 17 -35 29 46 -35 59 15 -35 25 49 0.55 176 0 0 -36 0 2 11 42 27.5 5 292 -66 -36 12 48 -35 47 19 -36 16 46 -35 43 22 0.55 177 0 0 -36 17 23 11 42 28.3 4 292 -66 -36 30 8 -36 4 40 -36 34 6 -36 0 43 0.55 178 0 0 -36 34 32 11 42 29.0 4 291 -66 -36 47 16 -36 21 49 -36 51 14 -36 17 53 0.56 179 0 0 -36 51 29 11 42 29.5 3 291 -66 -37 4 12 -36 38 47 -37 8 10 -36 34 51 0.57 180 0 0 -37 8 14 11 42 29.9 2 290 -66 -37 20 57 -36 55 33 -37 24 54 -36 51 37 0.58 -179 0 0 -37 24 47 11 42 30.1 1 289 -66 -37 37 29 -37 12 7 -37 41 26 -37 8 11 0.63 -178 0 0 -37 41 8 11 42 30.2 0 289 -65 -37 53 49 -37 28 28 -37 57 46 -37 24 32 0.97 Uncertainty in time = +/- 2 secs Prediction of 2023 Mar 1.1 Data for the target star ------------------------ * name: HIP 43360 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 49 56.7800 DE: +14 49 51.252 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 49 56.7797 DE: +14 49 51.253 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 8.4 * B mag [mag]: 8.7 * Diameter [mas]: 0.10 * 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]: 2.62070 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 date of fit: 2023 Feb 07 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): 0.014", 0.003", 105.614° remarks: * orbital elements for (396)Aeolia : Mean anomaly = 256.5114345658 deg Arg. of pericenter = 21.3489548422 deg Long. of node = 249.8788404479 deg Inclination = 2.5490051755 deg Eccentricity = 0.1595993153 Semimajor axis = 2.7417645904 AU Perihelion dist = 2.3041808391 AU Mag: H = 10.13, G = 0.15 Epoch of elements : MJD 60059.48220417 TDT (2023 Apr 25.4822) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Feb07,3.46,2023,4,25,11.571135,-0.085775,-0.470578,6.272027,-1.159325,0.005486,-0.001515,0.000000,0.000000 106.0139,14.7449,5.94,13.19,False HIP 43360,8.83243892,14.8309033,8.70,8.40,8.24,0.1,0,,8.85390517,14.7448742,7.17,6.89,0,0,0 396,Aeolia,15.57,39.1,2.6207,0,0,1.452,-3.89,,2.4,0 0,256.4067,2023,4,25,21.3490,249.8788,2.5490,0.15960,2.74176,2.30418,10.16,5.0,0.15 1.155,0.0140,0.0030,106,0.0032,Known errors,-1.00,-1,-1,-1 20230425__43360,60004.06 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Mar 01, 01:20 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org