IOTA/IOTA-ES occultation update for (36) Atalante / UCAC4 273-196532 event on 2023 Nov 01, 01:32 UT Visible from W USA Summary ------- On 2023 Nov 01 UT, the 112.2 km diameter asteroid (36) Atalante will occult a 11.7 mag star in the constellation Sagittarius for observers along a path across W USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.40 mag to 13.93 mag (the magnitude of the asteroid) for at most 4.130 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 Nov 01, 01:29 - 2023 Nov 01, 01:35 * geocentric midpoint of event [JD]: 2460249.56426321 * magnitude of target star: 11.66 * magnitude drop [mag]: 2.40 * estimated maximum duration [s]: 4.130 * Moon: 88 % sunlit, 151° distance * Sun: 70° distance * rough path description: W USA The occultation path -------------------- * approximate projected width [km]: 169 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 0.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.005, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.006", 0.001", 72°) * approx speed of asteroid's shadow [km/s]: 27.1627 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 273-196532 by 36 Atalante on 2023 Nov 1 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 .. .. .... .. .. .. .. .. .. 16 28 17 .. .. .. 16 25 56 .. .. .. .... 152 0 0 16 41 32 1 29 56.9 1 127 59 15 45 16 17 39 6 15 42 57 17 41 32 .... 153 0 0 15 59 15 1 29 57.1 2 128 60 15 3 42 16 56 3 15 1 25 16 58 27 -0.67 154 0 0 15 18 26 1 29 57.4 3 128 60 14 23 35 16 14 30 14 21 19 16 16 52 -0.84 155 0 0 14 39 3 1 29 57.9 4 128 61 13 44 51 15 34 26 13 42 37 15 36 46 -0.92 156 0 0 14 1 7 1 29 58.5 6 129 62 13 7 32 14 55 49 13 5 19 14 58 8 -0.96 157 0 0 13 24 34 1 29 59.3 7 129 62 12 31 35 14 18 40 12 29 23 14 20 56 -0.99 158 0 0 12 49 25 1 30 0.1 8 129 63 11 56 59 13 42 55 11 54 49 13 45 11 -1.01 159 0 0 12 15 39 1 30 1.1 9 129 63 11 23 44 13 8 35 11 21 36 13 10 49 -1.03 160 0 0 11 43 14 1 30 2.3 10 130 63 10 51 49 12 35 38 10 49 42 12 37 50 -1.04 161 0 0 11 12 8 1 30 3.5 11 130 63 10 21 12 12 4 3 10 19 6 12 6 14 -1.05 162 0 0 10 42 23 1 30 4.9 12 130 64 9 51 54 11 33 48 9 49 48 11 35 58 -1.06 163 0 0 10 13 55 1 30 6.4 13 130 64 9 23 52 11 4 54 9 21 48 11 7 3 -1.06 164 0 0 9 46 46 1 30 8.0 14 131 64 8 57 6 10 37 19 8 55 3 10 39 27 -1.07 165 0 0 9 20 52 1 30 9.7 15 131 64 8 31 36 10 11 2 8 29 33 10 13 9 -1.07 166 0 0 8 56 15 1 30 11.5 16 131 64 8 7 20 9 46 2 8 5 18 9 48 8 -1.08 167 0 0 8 32 53 1 30 13.4 17 131 63 7 44 17 9 22 18 7 42 17 9 24 23 -1.08 168 0 0 8 10 45 1 30 15.4 18 132 63 7 22 28 8 59 50 7 20 28 9 1 54 -1.09 169 0 0 7 49 50 1 30 17.5 19 132 63 7 1 52 8 38 37 6 59 52 8 40 41 -1.09 170 0 0 7 30 9 1 30 19.7 20 132 63 6 42 27 8 18 39 6 40 28 8 20 41 -1.09 171 0 0 7 11 39 1 30 22.0 21 132 62 6 24 13 7 59 53 6 22 15 8 1 55 -1.09 172 0 0 6 54 22 1 30 24.4 22 133 62 6 7 9 7 42 21 6 5 12 7 44 22 -1.10 173 0 0 6 38 16 1 30 26.9 23 133 61 5 51 16 7 26 0 5 49 20 7 28 1 -1.10 174 0 0 6 23 20 1 30 29.4 24 133 61 5 36 33 7 10 52 5 34 37 7 12 52 -1.10 175 0 0 6 9 34 1 30 32.0 25 134 60 5 22 58 6 56 55 5 21 3 6 58 54 -1.10 176 0 0 5 56 58 1 30 34.7 26 134 60 5 10 33 6 44 8 5 8 37 6 46 7 -1.11 177 0 0 5 45 32 1 30 37.5 27 134 59 4 59 15 6 32 32 4 57 20 6 34 31 -1.11 178 0 0 5 35 14 1 30 40.4 27 135 58 4 49 6 6 22 6 4 47 11 6 24 4 -1.11 179 0 0 5 26 5 1 30 43.3 28 135 58 4 40 4 6 12 49 4 38 10 6 14 47 -1.11 -180 0 0 5 18 5 1 30 46.3 29 136 57 4 32 10 6 4 42 4 30 16 6 6 40 -1.11 -179 0 0 5 11 13 1 30 49.4 30 136 56 4 25 23 5 57 44 4 23 29 5 59 42 -1.11 -178 0 0 5 5 28 1 30 52.6 31 137 55 4 19 43 5 51 55 4 17 49 5 53 53 -1.11 -177 0 0 5 0 51 1 30 55.8 31 137 55 4 15 9 5 47 15 4 13 16 5 49 12 -1.12 -176 0 0 4 57 22 1 30 59.1 32 138 54 4 11 43 5 43 43 4 9 49 5 45 40 -1.12 -175 0 0 4 55 1 1 31 2.4 33 138 53 4 9 23 5 41 20 4 7 30 5 43 17 -1.12 -174 0 0 4 53 47 1 31 5.8 33 139 52 4 8 10 5 40 6 4 6 17 5 42 3 -1.12 -173 0 0 4 53 41 1 31 9.3 34 139 51 4 8 3 5 40 0 4 6 10 5 41 57 -1.12 -172 0 0 4 54 42 1 31 12.8 35 140 50 4 9 3 5 41 2 4 7 10 5 42 59 -1.12 -171 0 0 4 56 51 1 31 16.4 35 141 50 4 11 10 5 43 14 4 9 17 5 45 11 -1.12 -170 0 0 5 0 8 1 31 20.1 36 141 49 4 14 24 5 46 34 4 12 31 5 48 31 -1.12 -169 0 0 5 4 33 1 31 23.8 36 142 48 4 18 45 5 51 3 4 16 51 5 53 0 -1.12 -168 0 0 5 10 6 1 31 27.5 37 143 47 4 24 13 5 56 41 4 22 19 5 58 38 -1.12 -167 0 0 5 16 47 1 31 31.4 38 144 46 4 30 49 6 3 28 4 28 55 6 5 26 -1.13 -166 0 0 5 24 38 1 31 35.2 38 144 45 4 38 32 6 11 26 4 36 38 6 13 24 -1.13 -165 0 0 5 33 37 1 31 39.1 39 145 44 4 47 24 6 20 33 4 45 29 6 22 32 -1.13 -164 0 0 5 43 46 1 31 43.1 39 146 43 4 57 24 6 30 51 4 55 29 6 32 50 -1.13 -163 0 0 5 55 4 1 31 47.1 39 147 42 5 8 33 6 42 21 5 6 37 6 44 20 -1.13 -162 0 0 6 7 34 1 31 51.2 40 148 41 5 20 51 6 55 1 5 18 55 6 57 1 -1.13 -161 0 0 6 21 13 1 31 55.3 40 149 40 5 34 19 7 8 53 5 32 22 7 10 54 -1.13 -160 0 0 6 36 5 1 31 59.5 40 150 39 5 48 57 7 23 58 5 47 0 7 25 59 -1.13 -159 0 0 6 52 8 1 32 3.7 41 151 38 6 4 47 7 40 17 6 2 49 7 42 18 -1.13 -158 0 0 7 9 25 1 32 7.9 41 152 37 6 21 48 7 57 49 6 19 50 7 59 51 -1.13 -157 0 0 7 27 54 1 32 12.2 41 153 36 6 40 1 8 16 35 6 38 2 8 18 38 -1.13 -156 0 0 7 47 38 1 32 16.5 41 154 35 6 59 27 8 36 37 6 57 27 8 38 41 -1.13 -155 0 0 8 8 36 1 32 20.8 41 155 34 7 20 7 8 57 55 7 18 6 9 0 0 -1.13 -154 0 0 8 30 50 1 32 25.2 41 156 33 7 42 1 9 20 30 7 39 59 9 22 36 -1.13 -153 0 0 8 54 20 1 32 29.7 41 157 31 8 5 10 9 44 23 8 3 8 9 46 30 -1.13 -152 0 0 9 19 8 1 32 34.1 41 158 30 8 29 35 10 9 35 8 27 32 10 11 43 -1.13 -151 0 0 9 45 15 1 32 38.6 41 159 29 8 55 17 10 36 7 8 53 13 10 38 15 -1.13 -150 0 0 10 12 40 1 32 43.1 41 160 28 9 22 17 11 3 59 9 20 12 11 6 9 -1.13 -149 0 0 10 41 26 1 32 47.6 41 162 27 9 50 36 11 33 13 9 48 30 11 35 24 -1.13 -148 0 0 11 11 33 1 32 52.2 41 163 26 10 20 15 12 3 51 10 18 8 12 6 3 -1.13 -147 0 0 11 43 3 1 32 56.7 41 164 25 10 51 14 12 35 52 10 49 6 12 38 6 -1.13 -146 0 0 12 15 56 1 33 1.3 41 165 24 11 23 36 13 9 20 11 21 26 13 11 35 -1.13 -145 0 0 12 50 14 1 33 5.9 40 166 23 11 57 21 13 44 14 11 55 9 13 46 30 -1.13 -144 0 0 13 25 59 1 33 10.5 40 167 21 12 32 29 14 20 36 12 30 17 14 22 54 -1.13 -143 0 0 14 3 10 1 33 15.2 40 169 20 13 9 4 14 58 27 13 6 50 15 0 47 -1.13 -142 0 0 14 41 51 1 33 19.8 39 170 19 13 47 4 15 37 50 13 44 49 15 40 12 -1.13 -141 0 0 15 22 1 1 33 24.4 39 171 18 14 26 33 16 18 45 14 24 16 16 21 9 -1.13 -140 0 0 16 3 43 1 33 29.0 38 172 17 15 7 31 17 1 14 15 5 12 17 3 40 -1.13 -139 0 0 16 46 58 1 33 33.6 38 173 16 15 49 59 17 45 18 15 47 38 17 47 46 -1.13 -138 0 0 17 31 47 1 33 38.2 37 174 14 16 33 59 18 31 0 16 31 36 18 33 30 -1.13 -137 0 0 18 18 12 1 33 42.7 36 175 13 17 19 33 19 18 20 17 17 8 19 20 53 -1.13 -136 0 0 19 6 14 1 33 47.3 35 176 12 18 6 40 20 7 21 18 4 13 20 9 57 -1.13 -135 0 0 19 55 55 1 33 51.8 35 177 11 18 55 24 20 58 5 18 52 54 21 0 43 -1.13 -134 0 0 20 47 17 1 33 56.2 34 178 10 19 45 45 21 50 33 19 43 13 21 53 14 -1.13 -133 0 0 21 40 21 1 34 0.6 33 179 9 20 37 44 22 44 47 20 35 10 22 47 31 -1.13 -132 0 0 22 35 9 1 34 5.0 32 180 7 21 31 24 23 40 49 21 28 47 23 43 36 -1.13 -131 0 0 23 31 42 1 34 9.3 31 181 6 22 26 45 24 38 42 22 24 5 24 41 32 -1.13 -130 0 0 24 30 3 1 34 13.5 30 182 5 23 23 50 25 38 27 23 21 6 25 41 21 -1.13 -129 0 0 25 30 13 1 34 17.7 29 183 4 24 22 39 26 40 7 24 19 52 26 43 5 -1.13 -128 0 0 26 32 15 1 34 21.7 28 184 3 25 23 14 27 43 44 25 20 24 27 46 46 -1.13 -127 0 0 27 36 9 1 34 25.7 27 185 1 26 25 36 28 49 21 26 22 43 28 52 28 -1.13 -126 0 0 28 41 59 1 34 29.6 26 186 0 27 29 48 29 57 0 27 26 51 30 0 12 -1.13 -125 0 0 29 49 45 1 34 33.3 25 187 -1 28 35 50 31 6 44 28 32 49 31 10 1 -1.14 -124 0 0 30 59 31 1 34 37.0 23 188 -2 29 43 44 32 18 37 29 40 38 32 21 59 -1.14 -123 0 0 32 11 19 1 34 40.5 22 188 -3 30 53 32 33 32 41 30 50 22 33 36 10 -1.14 -122 0 0 33 25 11 1 34 43.8 21 189 -4 32 5 15 34 49 1 32 2 0 34 52 36 -1.14 -121 0 0 34 41 9 1 34 47.0 19 190 -5 33 18 55 36 7 39 33 15 34 36 11 22 -1.14 -120 0 0 35 59 17 1 34 50.0 18 191 -7 34 34 33 37 28 42 34 31 7 37 32 33 -1.15 -119 0 0 37 19 37 1 34 52.8 16 191 -8 35 52 12 38 52 14 35 48 39 38 56 14 -1.15 -118 0 0 38 42 14 1 34 55.4 15 192 -9 37 11 53 40 18 22 37 8 13 40 22 31 -1.16 -117 0 0 40 7 11 1 34 57.8 13 193 -10 38 33 38 41 47 12 38 29 51 41 51 33 -1.16 -116 0 0 41 34 33 1 35 0.0 12 194 -11 39 57 29 43 18 54 39 53 34 43 23 26 -1.17 -115 0 0 43 4 25 1 35 1.9 10 195 -12 41 23 29 44 53 37 41 19 26 44 58 23 -1.18 -114 0 0 44 36 53 1 35 3.6 8 195 -13 42 51 41 46 31 36 42 47 28 46 36 38 -1.20 -113 0 0 46 12 7 1 35 5.0 7 196 -14 44 22 8 48 13 6 44 17 45 48 18 26 -1.22 -112 0 0 47 50 15 1 35 6.1 5 197 -14 45 54 55 49 58 30 45 50 19 50 4 13 -1.26 -111 0 0 49 31 29 1 35 6.8 3 198 -15 47 30 5 51 48 18 47 25 17 51 54 26 -1.35 -110 0 0 51 16 6 1 35 7.2 1 198 -16 49 7 45 .. .. .. 49 2 42 .. .. .. -1.72 0 0 0 .. .. .... .. .. .. .. .. .. 50 48 2 .. .. .. 50 42 43 .. .. .. .... Uncertainty in time = +/- 0 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: UCAC4 273-196532 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 23 29.8085 DE: -35 26 48.312 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 23 29.8085 DE: -35 26 48.312 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (36) Atalante asteroid class: approx. diameter [km]: 112 approx. diameter ["]: 0.056 distance from Earth [AU]: 2.77630 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#113 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): 0.006", 0.001", 72.309° remarks: * orbital elements for (36)Atalante : Mean anomaly = 296.7391984315 deg Arg. of pericenter = 47.8493543921 deg Long. of node = 358.1939918947 deg Inclination = 18.3741843677 deg Eccentricity = 0.3061879244 Semimajor axis = 2.7450537311 AU Perihelion dist = 1.9045514268 AU Mag: H = 8.59, G = 0.15 Epoch of elements : MJD 60249.06423611 TDT (2023 Nov 01.0642) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1132023Oct09,4.13,2023,11,1,1.542317,-0.344711,0.664809,13.613751,7.051074,0.005397,0.000339,0.000000,0.000000 -131.9610,-35.4031,152.77,-14.29,False UCAC4 273-196532,19.39161352,-35.4467532,0.00,11.66,0.00,0.0,0,,19.41754240,-35.4030740,2.39,0.00,0,0,0 36,Atalante,13.93,112.200,2.7763,0,0,3.528,22.34,,6.0,0 0,296.5086,2023,10,31,47.8494,358.1940,18.3742,0.30619,2.74505,1.90455,8.60,5.0,0.15 1.021,0.0057,0.0007,72,0.0057,Known errors,-1.00,0,-1,-1 20231101_196532,60232.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 20:59 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org