IOTA/IOTA-ES occultation update for (132) Aethra / UCAC4-630-009302 event on 2023 Nov 18, 05:42 UT Visible from Canada, USA Summary ------- On 2023 Nov 18 UT, the 45.8 km diameter asteroid (132) Aethra will occult a 12.4 mag star in the constellation Perseus for observers along a path across Canada, USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.71 mag to 12.29 mag (the magnitude of the asteroid) for at most 3.070 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 18, 05:35 - 2023 Nov 18, 05:49 * geocentric midpoint of event [JD]: 2460266.73787787 * magnitude of target star: 12.38 * magnitude drop [mag]: 0.71 * estimated maximum duration [s]: 3.070 * Moon: 26 % sunlit, 114° distance * Sun: 161° distance * rough path description: Canada, USA Additional comments ------------------- RUWE The occultation path -------------------- * approximate projected width [km]: 46 * 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]: 14.9227 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-630-009302 by 132 Aethra on 2023 Nov 18 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 -166 0 0 -30 0 9 5 49 37.6 1 47 -3 -29 43 2 -30 17 15 -29 37 7 -30 23 10 .... -165 0 0 -29 10 6 5 49 37.4 2 46 -4 -28 52 49 -29 27 22 -28 46 50 -29 33 21 -0.14 -164 0 0 -28 18 36 5 49 37.0 3 46 -5 -28 1 9 -28 36 2 -27 55 6 -28 42 4 -0.12 -163 0 0 -27 25 37 5 49 36.4 4 45 -6 -27 8 0 -27 43 14 -27 1 53 -27 49 20 -0.11 -162 0 0 -26 31 10 5 49 35.6 6 45 -8 -26 13 22 -26 48 57 -26 7 12 -26 55 7 -0.10 -161 0 0 -25 35 13 5 49 34.5 7 44 -9 -25 17 15 -25 53 11 -25 11 1 -25 59 24 -0.10 -160 0 0 -24 37 46 5 49 33.3 8 44 -10 -24 19 37 -24 55 54 -24 13 20 -25 2 11 -0.09 -159 0 0 -23 38 49 5 49 31.7 10 44 -11 -23 20 30 -23 57 8 -23 14 9 -24 3 28 -0.09 -158 0 0 -22 38 22 5 49 29.9 11 43 -13 -22 19 52 -22 56 51 -22 13 28 -23 3 15 -0.09 -157 0 0 -21 36 25 5 49 27.9 12 43 -14 -21 17 45 -21 55 5 -21 11 17 -22 1 32 -0.09 -156 0 0 -20 32 59 5 49 25.5 14 42 -15 -20 14 8 -20 51 49 -20 7 37 -20 58 20 -0.09 -155 0 0 -19 28 4 5 49 22.9 15 42 -16 -19 9 3 -19 47 4 -19 2 28 -19 53 39 -0.09 -154 0 0 -18 21 42 5 49 19.9 17 42 -18 -18 2 31 -18 40 52 -17 55 53 -18 47 30 -0.09 -153 0 0 -17 13 54 5 49 16.7 18 42 -19 -16 54 34 -17 33 14 -16 47 51 -17 39 56 -0.08 -152 0 0 -16 4 42 5 49 13.1 20 41 -21 -15 45 12 -16 24 12 -15 38 27 -16 30 57 -0.08 -151 0 0 -14 54 9 5 49 9.2 21 41 -22 -14 34 29 -15 13 47 -14 27 40 -15 20 36 -0.08 -150 0 0 -13 42 16 5 49 5.0 23 41 -23 -13 22 27 -14 2 4 -13 15 35 -14 8 55 -0.08 -149 0 0 -12 29 6 5 49 0.4 24 41 -25 -12 9 9 -12 49 3 -12 2 14 -12 55 58 -0.08 -148 0 0 -11 14 44 5 48 55.5 26 40 -26 -10 54 38 -11 34 49 -10 47 40 -11 41 47 -0.08 -147 0 0 - 9 59 13 5 48 50.3 27 40 -28 - 9 38 58 -10 19 26 - 9 31 58 -10 26 26 -0.08 -146 0 0 - 8 42 36 5 48 44.6 29 40 -29 - 8 22 14 - 9 2 57 - 8 15 11 - 9 10 0 -0.08 -145 0 0 - 7 24 59 5 48 38.7 30 40 -30 - 7 4 29 - 7 45 27 - 6 57 23 - 7 52 32 -0.08 -144 0 0 - 6 6 25 5 48 32.4 32 40 -32 - 5 45 49 - 6 27 0 - 5 38 41 - 6 34 8 -0.08 -143 0 0 - 4 47 1 5 48 25.8 34 40 -33 - 4 26 19 - 5 7 42 - 4 19 8 - 5 14 52 -0.08 -142 0 0 - 3 26 52 5 48 18.8 35 40 -35 - 3 6 4 - 3 47 39 - 2 58 51 - 3 54 50 -0.08 -141 0 0 - 2 6 3 5 48 11.5 37 40 -36 - 1 45 9 - 2 26 55 - 1 37 55 - 2 34 8 -0.08 -140 0 0 - 0 44 40 5 48 3.9 39 40 -38 - 0 23 42 - 1 5 37 - 0 16 26 - 1 12 52 -0.08 -139 0 0 0 37 9 5 47 55.9 40 40 -39 0 58 11 0 16 9 1 5 29 0 8 52 -0.08 -138 0 0 1 59 20 5 47 47.7 42 40 -41 2 20 25 1 38 16 2 27 44 1 30 58 -0.08 -137 0 0 3 21 45 5 47 39.2 44 41 -42 3 42 53 3 0 38 3 50 12 2 53 19 -0.08 -136 0 0 4 44 17 5 47 30.4 45 41 -43 5 5 27 4 23 8 5 12 48 4 15 48 -0.08 -135 0 0 6 6 50 5 47 21.4 47 41 -45 6 28 2 5 45 39 6 35 23 5 38 20 -0.08 -134 0 0 7 29 17 5 47 12.2 49 41 -46 7 50 30 7 8 6 7 57 51 7 0 46 -0.08 -133 0 0 8 51 32 5 47 2.7 50 42 -48 9 12 45 8 30 20 9 20 6 8 23 0 -0.09 -132 0 0 10 13 27 5 46 53.1 52 42 -49 10 34 40 9 52 16 10 42 1 9 44 56 -0.09 -131 0 0 11 34 57 5 46 43.2 53 43 -50 11 56 8 11 13 47 12 3 29 11 6 27 -0.09 -130 0 0 12 55 55 5 46 33.3 55 43 -51 13 17 5 12 34 46 13 24 25 12 27 27 -0.09 -129 0 0 14 16 15 5 46 23.2 57 44 -53 14 37 22 13 55 9 14 44 41 13 47 50 -0.09 -128 0 0 15 35 50 5 46 13.0 58 44 -54 15 56 55 15 14 47 16 4 13 15 7 30 -0.09 -127 0 0 16 54 37 5 46 2.7 60 45 -55 17 15 38 16 33 37 17 22 55 16 26 21 -0.09 -126 0 0 18 12 29 5 45 52.4 61 46 -56 18 33 25 17 51 33 18 40 41 17 44 19 -0.09 -125 0 0 19 29 21 5 45 42.0 63 47 -57 19 50 13 19 8 30 19 57 27 19 1 17 -0.09 -124 0 0 20 45 9 5 45 31.6 64 48 -58 21 5 55 20 24 23 21 13 8 20 17 12 -0.09 -123 0 0 21 59 48 5 45 21.2 66 49 -59 22 20 29 21 39 9 22 27 39 21 31 59 -0.09 -122 0 0 23 13 16 5 45 10.8 67 50 -60 23 33 50 22 52 42 23 40 59 22 45 35 -0.09 -121 0 0 24 25 28 5 45 0.5 69 51 -61 24 45 56 24 5 1 24 53 1 23 57 56 -0.09 -120 0 0 25 36 21 5 44 50.2 70 53 -61 25 56 42 25 16 1 26 3 45 25 8 59 -0.09 -119 0 0 26 45 53 5 44 40.0 72 54 -62 27 6 6 26 25 40 27 13 7 26 18 41 -0.09 -118 0 0 27 54 1 5 44 29.9 73 56 -63 28 14 7 27 33 57 28 21 5 27 27 0 -0.09 -117 0 0 29 0 44 5 44 19.9 74 58 -63 29 20 41 28 40 47 29 27 36 28 33 53 -0.10 -116 0 0 30 5 59 5 44 10.0 75 61 -64 30 25 48 29 46 12 30 32 40 29 39 20 -0.10 -115 0 0 31 9 47 5 44 0.2 77 63 -64 31 29 27 30 50 8 31 36 16 30 43 19 -0.10 -114 0 0 32 12 5 5 43 50.6 78 67 -65 32 31 36 31 52 35 32 38 22 31 45 50 -0.10 -113 0 0 33 12 53 5 43 41.1 79 70 -65 33 32 15 32 53 32 33 38 58 32 46 50 -0.10 -112 0 0 34 12 11 5 43 31.7 80 75 -65 34 31 23 33 52 59 34 38 3 33 46 21 -0.10 -111 0 0 35 9 59 5 43 22.5 81 80 -65 35 29 2 34 50 57 35 35 38 34 44 21 -0.10 -110 0 0 36 6 16 5 43 13.4 82 86 -65 36 25 9 35 47 24 36 31 42 35 40 52 -0.10 -109 0 0 37 1 4 5 43 4.5 82 93 -65 37 19 48 36 42 22 37 26 17 36 35 53 -0.11 -108 0 0 37 54 23 5 42 55.8 83 102 -65 38 12 57 37 35 51 38 19 23 37 29 25 -0.11 -107 0 0 38 46 14 5 42 47.3 83 112 -65 39 4 37 38 27 51 39 11 0 38 21 29 -0.11 -106 0 0 39 36 37 5 42 38.9 84 124 -65 39 54 51 39 18 24 40 1 10 39 12 6 -0.11 -105 0 0 40 25 34 5 42 30.7 84 135 -65 40 43 38 40 7 32 40 49 54 40 1 17 -0.11 -104 0 0 41 13 6 5 42 22.7 83 146 -65 41 31 0 40 55 14 41 37 12 40 49 2 -0.11 -103 0 0 41 59 15 5 42 14.8 83 157 -64 42 16 59 41 41 32 42 23 7 41 35 24 -0.11 -102 0 0 42 44 1 5 42 7.1 83 165 -64 43 1 35 42 26 28 43 7 40 42 20 24 -0.11 -101 0 0 43 27 27 5 41 59.6 82 173 -64 43 44 51 43 10 4 43 50 53 43 4 2 -0.11 -100 0 0 44 9 33 5 41 52.2 81 179 -63 44 26 48 43 52 20 44 32 46 43 46 22 -0.11 - 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Uncertainty in time = +/- 1 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: UCAC4-630-009302 * constellation : Perseus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 02 48 56.1601 DE: +35 58 53.403 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 02 48 56.1601 DE: +35 58 53.403 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.300) * V mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (132) Aethra asteroid class: approx. diameter [km]: 46 approx. diameter ["]: 0.043 distance from Earth [AU]: 1.48260 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", 90.9° remarks: * orbital elements for (132)Aethra : Mean anomaly = 301.8207162041 deg Arg. of pericenter = 255.5502247331 deg Long. of node = 258.0561191764 deg Inclination = 24.9790289345 deg Eccentricity = 0.3870279639 Semimajor axis = 2.6127506103 AU Perihelion dist = 1.6015430614 AU Mag: H = 8.95, G = 0.15 Epoch of elements : MJD 60266.23784722 TDT (2023 Nov 18.2378) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#782023Oct09,3.07,2023,11,18,5.709069,-0.069227,0.070822,-6.023719,-5.887155,0.001038,-0.001610,0.000001,0.000001 -100.0444,36.0825,90.63,-19.16,False UCAC4-630-009302,2.81560003,35.9815007,0.00,12.38,0.00,0.0,0,,2.84054871,36.0824586,0.71,0.00,0,0,0 132,Aethra,12.29,45.800,1.4826,0,0,-2.946,-34.93,,3.0,0 0,301.7652,2023,11,18,255.5502,258.0561,24.9790,0.38703,2.61275,1.60154,8.95,5.0,0.15 1.173,0.0103,0.0010,91,0.0104,Known errors,-1.00,0,-1,-1 20231118_009302,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org