IOTA/IOTA-ES occultation update for (132) Aethra / HIP 13252 event on 2023 Nov 16, 20:46 UT Visible from Russia, Europe, Africa Summary ------- On 2023 Nov 16 UT, the 45.8 km diameter asteroid (132) Aethra will occult a 7.5 mag star in the constellation Perseus for observers along a path across Russia, Europe, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.82 mag to 12.30 mag (the magnitude of the asteroid) for at most 3.090 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 Nov 16, 20:38 - 2023 Nov 16, 20:53 * geocentric midpoint of event [JD]: 2460265.36538292 * magnitude of target star: 7.49 * magnitude drop [mag]: 4.82 * estimated maximum duration [s]: 3.090 * Moon: 13 % sunlit, 134° distance * Sun: 161° distance * rough path description: Russia, Europe, Africa The occultation path -------------------- * approximate projected width [km]: 47 * 1 sigma uncertainty interval [path widths]: +/- 0.17 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.001", 91°) * approx speed of asteroid's shadow [km/s]: 14.8169 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 13252 by 132 Aethra on 2023 Nov 16 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 - 35 0 0 -24 35 32 20 53 10.6 1 49 -3 -24 18 42 -24 52 20 -24 12 57 -24 58 4 .... - 34 0 0 -23 46 27 20 53 10.3 2 48 -4 -23 29 27 -24 3 25 -23 23 39 -24 9 13 -0.21 - 33 0 0 -22 55 57 20 53 9.9 3 48 -5 -22 38 47 -23 13 5 -22 32 55 -23 18 56 -0.20 - 32 0 0 -22 4 1 20 53 9.2 5 48 -6 -21 46 41 -22 21 20 -21 40 46 -22 27 14 -0.19 - 31 0 0 -21 10 39 20 53 8.3 6 47 -7 -20 53 9 -21 28 8 -20 47 9 -21 34 6 -0.19 - 30 0 0 -20 15 50 20 53 7.2 7 47 -9 -19 58 9 -20 33 29 -19 52 6 -20 39 31 -0.19 - 29 0 0 -19 19 33 20 53 5.8 9 47 -10 -19 1 41 -19 37 23 -18 55 34 -19 43 28 -0.19 - 28 0 0 -18 21 48 20 53 4.2 10 46 -11 -18 3 45 -18 39 48 -17 57 35 -18 45 58 -0.19 - 27 0 0 -17 22 35 20 53 2.3 11 46 -12 -17 4 21 -17 40 46 -16 58 7 -17 46 59 -0.19 - 26 0 0 -16 21 54 20 53 0.1 13 46 -14 -16 3 30 -16 40 16 -15 57 12 -16 46 33 -0.19 - 25 0 0 -15 19 46 20 52 57.6 14 45 -15 -15 1 11 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3 8 16 54 12 15 55 42 -0.19 1 0 0 17 46 3 20 50 1.9 55 51 -50 18 7 53 17 24 15 18 15 22 17 16 49 -0.19 2 0 0 19 6 39 20 49 51.6 56 52 -51 19 28 30 18 44 51 19 35 59 18 37 25 -0.19 3 0 0 20 26 37 20 49 41.3 58 53 -52 20 48 28 20 4 49 20 55 57 19 57 23 -0.19 4 0 0 21 45 51 20 49 30.9 59 54 -53 22 7 41 21 24 4 22 15 9 21 16 38 -0.19 5 0 0 23 4 14 20 49 20.5 61 56 -54 23 26 3 22 42 29 23 33 31 22 35 3 -0.19 6 0 0 24 21 42 20 49 10.0 62 57 -54 24 43 28 23 59 59 24 50 56 23 52 34 -0.19 7 0 0 25 38 9 20 48 59.5 64 59 -55 25 59 53 25 16 29 26 7 19 25 9 5 -0.19 8 0 0 26 53 31 20 48 49.0 65 61 -56 27 15 11 26 31 54 27 22 36 26 24 31 -0.20 9 0 0 28 7 43 20 48 38.5 66 62 -57 28 29 18 27 46 10 28 36 42 27 38 48 -0.20 10 0 0 29 20 40 20 48 28.1 68 65 -57 29 42 11 28 59 12 29 49 33 28 51 52 -0.20 11 0 0 30 32 20 20 48 17.8 69 67 -58 30 53 46 30 10 57 31 1 6 30 3 40 -0.20 12 0 0 31 42 39 20 48 7.5 70 70 -58 32 3 59 31 21 23 32 11 17 31 14 7 -0.20 13 0 0 32 51 35 20 47 57.4 71 72 -59 33 12 48 32 30 25 33 20 4 32 23 11 -0.20 14 0 0 33 59 4 20 47 47.3 72 75 -59 34 20 11 33 38 1 34 27 24 33 30 50 -0.20 15 0 0 35 5 5 20 47 37.4 73 79 -59 35 26 4 34 44 9 35 33 15 34 37 1 -0.20 16 0 0 36 9 37 20 47 27.6 74 83 -60 36 30 28 35 48 49 36 37 36 35 41 43 -0.20 17 0 0 37 12 37 20 47 18.0 75 87 -60 37 33 19 36 51 57 37 40 25 36 44 54 -0.20 18 0 0 38 14 5 20 47 8.6 76 91 -60 38 34 39 37 53 34 38 41 41 37 46 33 -0.21 19 0 0 39 14 0 20 46 59.3 76 96 -60 39 34 25 38 53 38 39 41 24 38 46 41 -0.21 20 0 0 40 12 22 20 46 50.2 77 101 -60 40 32 37 39 52 9 40 39 33 39 45 15 -0.21 21 0 0 41 9 11 20 46 41.2 77 107 -60 41 29 17 40 49 8 41 36 9 40 42 17 -0.21 22 0 0 42 4 27 20 46 32.5 78 113 -60 42 24 23 41 44 34 42 31 12 41 37 46 -0.21 23 0 0 42 58 11 20 46 23.9 78 119 -60 43 17 57 42 38 27 43 24 42 42 31 43 -0.21 24 0 0 43 50 23 20 46 15.5 78 125 -60 44 9 59 43 30 50 44 16 41 43 24 9 -0.21 25 0 0 44 41 5 20 46 7.3 78 131 -59 45 0 30 44 21 42 45 7 9 44 15 5 -0.21 26 0 0 45 30 17 20 45 59.3 78 137 -59 45 49 31 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-0.33 167 0 0 41 55 12 20 39 8.0 1 322 8 42 15 32 41 34 54 42 22 30 41 27 59 -0.55 Uncertainty in time = +/- 1 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: HIP 13252 * constellation : Perseus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 02 50 33.5455 DE: +36 17 48.576 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 02 50 33.5454 DE: +36 17 48.577 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 7.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (132) Aethra asteroid class: approx. diameter [km]: 46 approx. diameter ["]: 0.042 distance from Earth [AU]: 1.48790 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#78 date of fit: 2023 Oct 09 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): 0.010", 0.001", 91.014° remarks: * orbital elements for (132)Aethra : Mean anomaly = 301.5009483614 deg Arg. of pericenter = 255.5497911989 deg Long. of node = 258.0562501306 deg Inclination = 24.9789243221 deg Eccentricity = 0.3870301485 Semimajor axis = 2.6127602904 AU Perihelion dist = 1.6015432871 AU Mag: H = 8.95, G = 0.15 Epoch of elements : MJD 60264.86527778 TDT (2023 Nov 16.8653) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#782023Oct09,3.09,2023,11,16,20.769190,-0.136735,0.145247,-6.089404,-5.732339,0.000863,-0.001694,0.000001,0.000001 35.8136,36.3971,-135.34,-18.83,False HIP 13252,2.84265152,36.2968267,0.00,7.49,0.00,0.0,4,,2.86768024,36.3970664,4.82,0.00,0,0,0 132,Aethra,12.30,45.800,1.4879,0,0,-2.980,-33.89,,3.0,0 0,301.2990,2023,11,16,255.5498,258.0563,24.9789,0.38703,2.61276,1.60154,8.95,5.0,0.15 1.171,0.0103,0.0010,91,0.0104,Known errors,-1.00,0,-1,-1 20231116__13252,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:05 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org