IOTA/IOTA-ES occultation update for (13) Egeria / TYC 7487-01616-1 event on 2023 Oct 28, 21:06 UT Visible from Europe, Africa Summary ------- On 2023 Oct 28 UT, the 207.8 km diameter asteroid (13) Egeria will occult a 10.2 mag star in the constellation Piscis Austrinus for observers along a path across Europe, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.01 mag to 12.03 mag (the magnitude of the asteroid) for at most 15.490 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: 2023 Oct 28, 20:58 - 2023 Oct 28, 21:14 * geocentric midpoint of event [JD]: 2460246.37971454 * magnitude of target star: 10.20 * magnitude drop [mag]: 2.01 * estimated maximum duration [s]: 15.490 * Moon: 100 % sunlit, 80° distance * Sun: 102° distance * rough path description: Europe, Africa Additional comments ------------------- dup source The occultation path -------------------- * approximate projected width [km]: 209 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 0.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.004, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.004", 0.002", 69°) * approx speed of asteroid's shadow [km/s]: 13.4116 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7487-01616-1 by 13 Egeria on 2023 Oct 28 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 0 0 0 .. .. .... .. .. .. .. .. .. -45 32 32 .. .. .. -45 36 39 .. .. .. .... -153 0 0 -44 55 26 20 58 55.4 0 138 56 -46 19 7 .. .. .. -46 23 10 .. .. .. .... -152 0 0 -45 41 22 20 58 55.5 2 137 56 -47 3 46 -44 18 40 -47 7 45 -44 14 39 0.02 -151 0 0 -46 25 24 20 58 55.9 3 136 55 -47 46 33 -45 3 58 -47 50 29 -45 0 0 -0.03 -150 0 0 -47 7 38 20 58 56.3 3 136 55 -48 27 34 -45 47 24 -48 31 27 -45 43 30 -0.05 -149 0 0 -47 48 6 20 58 56.9 4 135 54 -49 6 54 -46 29 2 -49 10 42 -46 25 12 -0.06 -148 0 0 -48 26 55 20 58 57.6 5 134 54 -49 44 35 -47 8 58 -49 48 21 -47 5 11 -0.07 -147 0 0 -49 4 7 20 58 58.4 6 133 54 -50 20 43 -47 47 15 -50 24 25 -47 43 31 -0.08 -146 0 0 -49 39 47 20 58 59.2 7 133 53 -50 55 21 -48 23 58 -50 59 0 -48 20 17 -0.08 -145 0 0 -50 13 59 20 59 0.2 8 132 53 -51 28 33 -48 59 10 -51 32 9 -48 55 32 -0.09 -144 0 0 -50 46 46 20 59 1.3 9 131 52 -52 0 22 -49 32 56 -52 3 56 -49 29 20 -0.09 -143 0 0 -51 18 11 20 59 2.4 10 130 52 -52 30 52 -50 5 17 -52 34 23 -50 1 45 -0.09 -142 0 0 -51 48 19 20 59 3.6 10 130 51 -53 0 6 -50 36 18 -53 3 35 -50 32 49 -0.09 -141 0 0 -52 17 11 20 59 4.8 11 129 51 -53 28 8 -51 6 3 -53 31 34 -51 2 35 -0.09 -139 59 59 -52 44 52 20 59 6.2 12 128 51 -53 54 58 -51 34 33 -53 58 22 -51 31 8 -0.10 -138 59 59 -53 11 23 20 59 7.5 13 127 50 -54 20 42 -52 1 51 -54 24 3 -51 58 29 -0.10 -137 59 59 -53 36 47 20 59 8.9 14 126 50 -54 45 21 -52 28 2 -54 48 40 -52 24 41 -0.10 -136 59 59 -54 1 7 20 59 10.4 14 126 49 -55 8 57 -52 53 6 -55 12 14 -52 49 47 -0.10 -135 59 59 -54 24 25 20 59 11.9 15 125 49 -55 31 33 -53 17 6 -55 34 48 -53 13 50 -0.10 -134 59 59 -54 46 44 20 59 13.4 16 124 48 -55 53 11 -53 40 5 -55 56 24 -53 36 51 -0.10 -133 59 59 -55 8 4 20 59 15.0 16 123 48 -56 13 53 -54 2 5 -56 17 5 -53 58 53 -0.10 -132 59 59 -55 28 30 20 59 16.6 17 122 48 -56 33 42 -54 23 8 -56 36 51 -54 19 57 -0.10 -131 59 59 -55 48 2 20 59 18.3 18 121 47 -56 52 38 -54 43 15 -56 55 46 -54 40 6 -0.10 -130 59 59 -56 6 41 20 59 19.9 18 121 47 -57 10 44 -55 2 29 -57 13 50 -54 59 22 -0.10 -129 59 59 -56 24 31 20 59 21.6 19 120 46 -57 28 1 -55 20 52 -57 31 6 -55 17 46 -0.11 -128 59 59 -56 41 32 20 59 23.4 20 119 46 -57 44 31 -55 38 24 -57 47 34 -55 35 20 -0.11 -127 59 59 -56 57 46 20 59 25.1 20 118 46 -58 0 15 -55 55 8 -58 3 17 -55 52 5 -0.11 -126 59 59 -57 13 15 20 59 26.9 21 117 45 -58 15 15 -56 11 5 -58 18 16 -56 8 4 -0.11 -125 59 59 -57 27 59 20 59 28.7 21 116 45 -58 29 32 -56 26 16 -58 32 31 -56 23 16 -0.11 -124 59 59 -57 42 0 20 59 30.6 22 116 44 -58 43 8 -56 40 43 -58 46 5 -56 37 44 -0.11 -123 59 59 -57 55 19 20 59 32.4 23 115 44 -58 56 2 -56 54 27 -58 58 59 -56 51 29 -0.11 -122 59 59 -58 7 57 20 59 34.3 23 114 44 -59 8 17 -57 7 29 -59 11 13 -57 4 32 -0.11 -121 59 59 -58 19 56 20 59 36.2 24 113 43 -59 19 54 -57 19 49 -59 22 48 -57 16 54 -0.11 -120 59 59 -58 31 16 20 59 38.1 24 112 43 -59 30 53 -57 31 30 -59 33 46 -57 28 36 -0.11 -119 59 59 -58 41 58 20 59 40.0 25 111 42 -59 41 15 -57 42 32 -59 44 8 -57 39 39 -0.11 -118 59 59 -58 52 3 20 59 42.0 25 111 42 -59 51 2 -57 52 56 -59 53 53 -57 50 4 -0.11 -117 59 59 -59 1 32 20 59 44.0 26 110 42 -60 0 14 -58 2 43 -60 3 4 -57 59 52 -0.11 -116 59 59 -59 10 26 20 59 46.0 26 109 41 -60 8 51 -58 11 53 -60 11 41 -58 9 3 -0.11 -115 59 59 -59 18 45 20 59 48.0 27 108 41 -60 16 54 -58 20 28 -60 19 44 -58 17 38 -0.11 -114 59 59 -59 26 30 20 59 50.0 27 107 41 -60 24 25 -58 28 27 -60 27 14 -58 25 38 -0.11 -113 59 59 -59 33 42 20 59 52.1 28 106 40 -60 31 23 -58 35 52 -60 34 11 -58 33 4 -0.11 -112 59 59 -59 40 20 20 59 54.2 29 105 40 -60 37 50 -58 42 43 -60 40 37 -58 39 56 -0.11 -111 59 59 -59 46 27 20 59 56.3 29 105 39 -60 43 45 -58 49 1 -60 46 32 -58 46 14 -0.12 -110 59 59 -59 52 1 20 59 58.4 30 104 39 -60 49 9 -58 54 46 -60 51 55 -58 51 59 -0.12 -109 59 59 -59 57 4 21 0 0.5 30 103 39 -60 54 3 -58 59 58 -60 56 49 -58 57 12 -0.12 -108 59 59 -60 1 36 21 0 2.7 31 102 38 -60 58 26 -59 4 39 -61 1 12 -59 1 53 -0.12 -107 59 59 -60 5 37 21 0 4.9 31 101 38 -61 2 20 -59 8 47 -61 5 5 -59 6 2 -0.12 -106 59 59 -60 9 8 21 0 7.1 32 100 38 -61 5 44 -59 12 25 -61 8 29 -59 9 39 -0.12 -105 59 59 -60 12 9 21 0 9.3 32 100 37 -61 8 39 -59 15 31 -61 11 24 -59 12 46 -0.12 -104 59 59 -60 14 39 21 0 11.6 33 99 37 -61 11 5 -59 18 6 -61 13 49 -59 15 21 -0.12 -103 59 59 -60 16 40 21 0 13.9 33 98 36 -61 13 2 -59 20 10 -61 15 46 -59 17 26 -0.12 -102 59 59 -60 18 11 21 0 16.2 34 97 36 -61 14 31 -59 21 44 -61 17 14 -59 19 0 -0.12 -101 59 59 -60 19 12 21 0 18.6 34 96 36 -61 15 30 -59 22 47 -61 18 14 -59 20 3 -0.12 -100 59 59 -60 19 44 21 0 20.9 35 95 35 -61 16 1 -59 23 20 -61 18 45 -59 20 36 -0.12 - 99 59 59 -60 19 47 21 0 23.3 35 94 35 -61 16 4 -59 23 23 -61 18 47 -59 20 39 -0.12 - 98 59 59 -60 19 20 21 0 25.8 36 94 35 -61 15 38 -59 22 55 -61 18 21 -59 20 11 -0.12 - 97 59 59 -60 18 23 21 0 28.2 36 93 34 -61 14 43 -59 21 57 -61 17 27 -59 19 12 -0.12 - 96 59 59 -60 16 57 21 0 30.7 37 92 34 -61 13 20 -59 20 28 -61 16 4 -59 17 43 -0.12 - 95 59 59 -60 15 2 21 0 33.2 37 91 33 -61 11 28 -59 18 28 -61 14 12 -59 15 43 -0.12 - 94 59 59 -60 12 36 21 0 35.8 38 90 33 -61 9 7 -59 15 58 -61 11 51 -59 13 13 -0.12 - 93 59 59 -60 9 40 21 0 38.4 38 89 33 -61 6 17 -59 12 56 -61 9 1 -59 10 11 -0.12 - 93 0 0 -60 6 14 21 0 41.1 39 89 32 -61 2 57 -59 9 24 -61 5 42 -59 6 38 -0.12 - 92 0 0 -60 2 17 21 0 43.7 39 88 32 -60 59 8 -59 5 19 -61 1 53 -59 2 33 -0.12 - 91 0 0 -59 57 50 21 0 46.5 40 87 32 -60 54 49 -59 0 43 -60 57 34 -58 57 57 -0.12 - 90 0 0 -59 52 51 21 0 49.2 40 86 31 -60 49 59 -58 55 35 -60 52 46 -58 52 48 -0.12 - 89 0 0 -59 47 20 21 0 52.0 41 85 31 -60 44 39 -58 49 54 -60 47 26 -58 47 6 -0.12 - 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24 0 0 - 8 34 1 21 9 51.3 66 189 -24 -10 58 55 - 6 7 16 -11 5 54 - 6 0 6 -0.11 - 23 0 0 - 6 10 35 21 10 11.0 64 190 -26 - 8 38 7 - 3 41 10 - 8 45 14 - 3 33 52 -0.11 - 22 0 0 - 3 43 33 21 10 30.7 61 191 -28 - 6 13 31 - 1 11 40 - 6 20 45 - 1 4 15 -0.10 - 21 0 0 - 1 13 24 21 10 50.2 58 192 -30 - 3 45 34 1 20 42 - 3 52 55 1 28 14 -0.10 - 20 0 0 1 19 17 21 11 9.5 56 193 -31 - 1 14 49 3 55 19 - 1 22 15 4 2 56 -0.10 - 19 0 0 3 53 52 21 11 28.3 53 194 -33 1 18 9 6 31 29 1 10 39 6 39 11 -0.10 - 18 0 0 6 29 37 21 11 46.6 50 194 -35 3 52 38 9 8 29 3 45 4 9 16 14 -0.10 - 17 0 0 9 5 47 21 12 4.1 47 195 -36 6 27 55 11 45 31 6 20 19 11 53 19 -0.10 - 16 0 0 11 41 38 21 12 20.8 45 195 -37 9 3 15 14 21 50 8 55 37 14 29 39 -0.10 - 15 0 0 14 16 22 21 12 36.6 42 196 -39 11 37 53 16 56 39 11 30 14 17 4 29 -0.10 - 14 0 0 16 49 17 21 12 51.4 39 196 -40 14 11 3 19 29 15 14 3 25 19 37 4 -0.10 - 13 0 0 19 19 41 21 13 5.1 36 197 -41 16 42 5 21 58 59 16 34 29 22 6 45 -0.10 - 12 0 0 21 46 58 21 13 17.7 34 197 -42 19 10 20 24 25 14 19 2 46 24 32 57 -0.09 - 11 0 0 24 10 35 21 13 29.2 31 198 -43 21 35 14 26 47 30 21 27 44 26 55 10 -0.09 - 10 0 0 26 30 4 21 13 39.6 29 199 -44 23 56 18 29 5 22 23 48 53 29 12 57 -0.09 - 9 0 0 28 45 5 21 13 48.9 26 199 -44 26 13 8 31 18 30 26 5 48 31 26 0 -0.09 - 8 0 0 30 55 20 21 13 57.2 24 200 -45 28 25 26 33 26 41 28 18 12 33 34 4 -0.09 - 7 0 0 33 0 39 21 14 4.5 22 200 -45 30 32 57 35 29 43 30 25 49 35 37 0 -0.09 - 6 0 0 35 0 53 21 14 10.8 20 201 -45 32 35 33 37 27 33 32 28 31 37 34 42 -0.09 - 5 0 0 36 56 0 21 14 16.3 17 201 -45 34 33 8 39 20 9 34 26 14 39 27 11 -0.09 - 4 0 0 38 46 1 21 14 21.0 15 202 -45 36 25 42 41 7 34 36 18 55 41 14 28 -0.09 - 3 0 0 40 30 58 21 14 24.9 14 203 -45 38 13 16 42 49 52 38 6 37 42 56 38 -0.09 - 2 0 0 42 10 59 21 14 28.2 12 203 -45 39 55 55 44 27 11 39 49 23 44 33 49 -0.09 - 1 0 0 43 46 9 21 14 30.9 10 204 -45 41 33 45 45 59 39 41 27 21 46 6 9 -0.09 0 0 0 45 16 39 21 14 33.1 8 205 -45 43 6 54 47 27 27 43 0 38 47 33 50 -0.09 1 0 0 46 42 39 21 14 34.8 7 206 -45 44 35 33 48 50 46 44 29 24 48 57 1 -0.09 2 0 0 48 4 20 21 14 36.1 5 206 -45 45 59 50 50 9 47 45 53 49 50 15 54 -0.09 3 0 0 49 21 52 21 14 37.0 4 207 -44 47 19 57 51 24 43 47 14 3 51 30 42 -0.08 4 0 0 50 35 28 21 14 37.6 2 208 -44 48 36 4 52 35 45 48 30 18 52 41 37 -0.08 5 0 0 51 45 19 21 14 37.8 1 209 -44 49 48 23 .. .. .. 49 42 44 .. .. .. -0.04 0 0 0 .. .. .... .. .. .. .. .. .. 50 57 5 .. .. .. 50 51 33 .. .. .. .... 0 0 0 .. .. .... .. .. .. .. .. .. 52 2 21 .. .. .. 51 56 56 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: TYC 7487-01616-1 * constellation : Piscis Austrinus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 43 20.4600 DE: -32 14 35.987 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 43 20.4595 DE: -32 14 35.990 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (13) Egeria asteroid class: ShapeModel approx. diameter [km]: 208 approx. diameter ["]: 0.121 distance from Earth [AU]: 2.37000 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#116 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): 0.004", 0.002", 68.76° remarks: * orbital elements for (13)Egeria : Mean anomaly = 220.5888146128 deg Arg. of pericenter = 79.8041553868 deg Long. of node = 43.2076740212 deg Inclination = 16.5366576828 deg Eccentricity = 0.0856333483 Semimajor axis = 2.5756204256 AU Perihelion dist = 2.3550614248 AU Mag: H = 6.94, G = 0.15 Epoch of elements : MJD 60245.87965278 TDT (2023 Oct 28.8797) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1162023Oct09,15.49,2023,10,28,21.113149,-0.105333,0.056040,3.488410,6.718218,0.005168,0.002304,0.000000,0.000000 -27.4599,-32.1367,-140.75,-13.25,False TYC 7487-01616-1,21.72235002,-32.2433297,0.00,10.20,0.00,0.0,0,,21.74585634,-32.1366601,2.02,0.00,0,0,0 13,Egeria,12.03,207.800,2.3700,0,0,1.020,24.93,,13.8,0 0,220.3791,2023,10,28,79.8042,43.2077,16.5367,0.08563,2.57562,2.35506,6.94,5.0,0.15 1.024,0.0040,0.0017,69,0.0043,Known errors,-1.00,0,-1,-1 20231028_1616-1,60232.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 20:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org