IOTA/IOTA-ES occultation update for (409) Aspasia / TYC 1797-01026-1 event on 2023 Nov 03, 08:21 UT Visible from E Canada, USA Summary ------- On 2023 Nov 03 UT, the 176.3 km diameter asteroid (409) Aspasia will occult a 11.9 mag star in the constellation Aries for observers along a path across E Canada, USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.61 mag to 11.61 mag (the magnitude of the asteroid) for at most 13.930 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 03, 08:13 - 2023 Nov 03, 08:30 * geocentric midpoint of event [JD]: 2460251.84864367 * magnitude of target star: 11.91 * magnitude drop [mag]: 0.61 * estimated maximum duration [s]: 13.930 * Moon: 70 % sunlit, 52° distance * Sun: 165° distance * rough path description: E Canada, USA The occultation path -------------------- * approximate projected width [km]: 181 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.001", 87°) * approx speed of asteroid's shadow [km/s]: 12.6603 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1797-01026-1 by 409 Aspasia on 2023 Nov 3 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 158 0 0 -13 1 29 8 30 12.8 1 67 -15 -12 7 56 -13 54 50 -12 5 16 -13 57 29 .... 159 0 0 -12 35 28 8 30 12.6 2 66 -16 -11 41 44 -13 29 0 -11 39 3 -13 31 40 -0.23 160 0 0 -12 8 51 8 30 12.2 3 66 -17 -11 14 56 -13 2 35 -11 12 14 -13 5 15 -0.23 161 0 0 -11 41 38 8 30 11.7 4 66 -18 -10 47 31 -12 35 33 -10 44 49 -12 38 14 -0.23 162 0 0 -11 13 49 8 30 11.0 5 66 -19 -10 19 30 -12 7 55 -10 16 48 -12 10 37 -0.23 163 0 0 -10 45 24 8 30 10.0 6 65 -20 - 9 50 54 -11 39 42 - 9 48 11 -11 42 24 -0.23 164 0 0 -10 16 24 8 30 8.9 7 65 -21 - 9 21 42 -11 10 54 - 9 18 58 -11 13 36 -0.23 165 0 0 - 9 46 49 8 30 7.6 8 65 -23 - 8 51 55 -10 41 30 - 8 49 11 -10 44 13 -0.22 166 0 0 - 9 16 40 8 30 6.1 9 65 -24 - 8 21 34 -10 11 32 - 8 18 49 -10 14 16 -0.22 167 0 0 - 8 45 56 8 30 4.4 10 65 -25 - 7 50 38 - 9 41 0 - 7 47 52 - 9 43 44 -0.22 168 0 0 - 8 14 38 8 30 2.6 11 65 -26 - 7 19 8 - 9 9 54 - 7 16 22 - 9 12 39 -0.22 169 0 0 - 7 42 47 8 30 0.5 13 65 -27 - 6 47 5 - 8 38 15 - 6 44 19 - 8 41 0 -0.22 170 0 0 - 7 10 23 8 29 58.2 14 64 -28 - 6 14 30 - 8 6 3 - 6 11 42 - 8 8 49 -0.22 171 0 0 - 6 37 27 8 29 55.7 15 64 -29 - 5 41 22 - 7 33 18 - 5 38 34 - 7 36 4 -0.22 172 0 0 - 6 3 59 8 29 53.0 16 64 -30 - 5 7 42 - 7 0 2 - 5 4 54 - 7 2 49 -0.22 173 0 0 - 5 30 0 8 29 50.1 17 64 -31 - 4 33 31 - 6 26 14 - 4 30 42 - 6 29 2 -0.22 174 0 0 - 4 55 30 8 29 47.0 18 64 -33 - 3 58 50 - 5 51 56 - 3 56 1 - 5 54 44 -0.22 175 0 0 - 4 20 31 8 29 43.7 19 64 -34 - 3 23 40 - 5 17 8 - 3 20 50 - 5 19 57 -0.22 176 0 0 - 3 45 3 8 29 40.2 20 64 -35 - 2 48 1 - 4 41 51 - 2 45 10 - 4 44 41 -0.22 177 0 0 - 3 9 7 8 29 36.5 22 64 -36 - 2 11 53 - 4 6 6 - 2 9 2 - 4 8 56 -0.22 178 0 0 - 2 32 43 8 29 32.5 23 64 -37 - 1 35 19 - 3 29 53 - 1 32 27 - 3 32 44 -0.22 179 0 0 - 1 55 53 8 29 28.4 24 64 -38 - 0 58 18 - 2 53 14 - 0 55 25 - 2 56 5 -0.22 -180 0 0 - 1 18 37 8 29 24.1 25 64 -39 - 0 20 52 - 2 16 8 - 0 17 59 - 2 19 0 -0.22 -179 0 0 - 0 40 57 8 29 19.5 26 64 -40 0 16 59 - 1 38 38 0 19 53 - 1 41 30 -0.22 -178 0 0 - 0 2 53 8 29 14.8 27 64 -42 0 55 13 - 1 0 44 0 58 7 - 1 3 37 -0.22 -177 0 0 0 35 33 8 29 9.8 29 64 -43 1 33 49 - 0 22 28 1 36 44 - 0 25 21 -0.22 -176 0 0 1 14 21 8 29 4.7 30 64 -44 2 12 47 0 16 11 2 15 42 0 13 18 -0.22 -175 0 0 1 53 29 8 28 59.3 31 65 -45 2 52 4 0 55 10 2 55 0 0 52 16 -0.22 -174 0 0 2 32 57 8 28 53.8 32 65 -46 3 31 41 1 34 29 3 34 37 1 31 35 -0.22 -173 0 0 3 12 43 8 28 48.1 33 65 -47 4 11 35 2 14 6 4 14 32 2 11 11 -0.22 -172 0 0 3 52 45 8 28 42.2 34 65 -48 4 51 46 2 54 1 4 54 43 2 51 5 -0.22 -171 0 0 4 33 4 8 28 36.1 35 65 -50 5 32 12 3 34 11 5 35 10 3 31 15 -0.22 -170 0 0 5 13 36 8 28 29.8 37 65 -51 6 12 53 4 14 36 6 15 50 4 11 40 -0.22 -169 0 0 5 54 22 8 28 23.3 38 66 -52 6 53 45 4 55 15 6 56 43 4 52 18 -0.22 -168 0 0 6 35 19 8 28 16.7 39 66 -53 7 34 50 5 36 5 7 37 48 5 33 9 -0.22 -167 0 0 7 16 27 8 28 9.9 40 66 -54 8 16 4 6 17 7 8 19 2 6 14 10 -0.22 -166 0 0 7 57 44 8 28 2.9 41 67 -55 8 57 26 6 58 18 9 0 25 6 55 21 -0.22 -165 0 0 8 39 8 8 27 55.8 42 67 -56 9 38 56 7 39 37 9 41 55 7 36 39 -0.22 -164 0 0 9 20 39 8 27 48.6 44 67 -57 10 20 32 8 21 3 10 23 32 8 18 5 -0.22 -163 0 0 10 2 14 8 27 41.1 45 68 -58 11 2 12 9 2 34 11 5 12 8 59 36 -0.22 -162 0 0 10 43 53 8 27 33.6 46 68 -59 11 43 56 9 44 9 11 46 55 9 41 11 -0.22 -161 0 0 11 25 34 8 27 25.9 47 69 -61 12 25 40 10 25 46 12 28 40 10 22 48 -0.22 -160 0 0 12 7 16 8 27 18.1 48 69 -62 13 7 25 11 7 25 13 10 25 11 4 26 -0.23 -159 0 0 12 48 57 8 27 10.1 49 70 -63 13 49 9 11 49 3 13 52 9 11 46 4 -0.23 -158 0 0 13 30 36 8 27 2.0 50 70 -64 14 30 50 12 30 39 14 33 50 12 27 41 -0.23 -157 0 0 14 12 11 8 26 53.9 51 71 -65 15 12 27 13 12 13 15 15 27 13 9 14 -0.23 -156 0 0 14 53 41 8 26 45.6 53 72 -66 15 53 58 13 53 42 15 56 58 13 50 43 -0.23 -155 0 0 15 35 5 8 26 37.2 54 73 -67 16 35 22 14 35 5 16 38 23 14 32 6 -0.23 -154 0 0 16 16 21 8 26 28.8 55 73 -68 17 16 39 15 16 20 17 19 39 15 13 22 -0.23 -153 0 0 16 57 27 8 26 20.2 56 74 -68 17 57 45 15 57 28 18 0 46 15 54 29 -0.23 -152 0 0 17 38 24 8 26 11.6 57 75 -69 18 38 41 16 38 25 18 41 41 16 35 26 -0.23 -151 0 0 18 19 9 8 26 2.9 58 76 -70 19 19 24 17 19 11 19 22 25 17 16 12 -0.23 -150 0 0 18 59 41 8 25 54.2 59 77 -71 19 59 55 17 59 45 20 2 55 17 56 46 -0.23 -149 0 0 19 39 58 8 25 45.4 60 78 -72 20 40 10 18 40 5 20 43 10 18 37 6 -0.23 -148 0 0 20 20 1 8 25 36.6 61 79 -72 21 20 10 19 20 10 21 23 10 19 17 11 -0.23 -147 0 0 20 59 46 8 25 27.7 62 81 -73 21 59 52 19 59 58 22 2 52 19 57 0 -0.23 -146 0 0 21 39 14 8 25 18.8 63 82 -74 22 39 16 20 39 30 22 42 16 20 36 32 -0.23 -145 0 0 22 18 24 8 25 9.8 64 83 -74 23 18 22 21 18 44 23 21 21 21 15 46 -0.23 -144 0 0 22 57 13 8 25 0.9 65 85 -75 23 57 6 21 57 37 24 0 6 21 54 40 -0.23 -143 0 0 23 35 42 8 24 51.9 66 86 -75 24 35 30 22 36 11 24 38 29 22 33 14 -0.23 -142 0 0 24 13 48 8 24 42.9 67 88 -76 25 13 31 23 14 23 25 16 30 23 11 26 -0.23 -141 0 0 24 51 32 8 24 33.9 68 90 -76 25 51 9 23 52 13 25 54 8 23 49 16 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24 22 33 22 35 31 21 30 -0.24 -127 0 0 32 53 6 8 22 31.1 76 134 -72 33 50 44 31 55 45 33 53 37 31 52 54 -0.24 -126 0 0 33 23 48 8 22 22.7 76 138 -71 34 21 15 32 26 37 34 24 8 32 23 47 -0.24 -125 0 0 33 53 58 8 22 14.4 76 142 -71 34 51 15 32 56 58 34 54 7 32 54 8 -0.24 -124 0 0 34 23 37 8 22 6.1 76 147 -70 35 20 43 33 26 47 35 23 34 33 23 58 -0.24 -123 0 0 34 52 43 8 21 57.9 76 151 -69 35 49 38 33 56 4 35 52 28 33 53 15 -0.24 -122 0 0 35 21 18 8 21 49.8 76 156 -69 36 18 1 34 24 50 36 20 51 34 22 1 -0.24 -121 0 0 35 49 20 8 21 41.8 76 160 -68 36 45 52 34 53 3 36 48 41 34 50 15 -0.24 -120 0 0 36 16 50 8 21 33.8 76 164 -67 37 13 11 35 20 44 37 15 59 35 17 57 -0.24 -119 0 0 36 43 47 8 21 26.0 76 168 -66 37 39 57 35 47 53 37 42 45 35 45 6 -0.24 -118 0 0 37 10 12 8 21 18.2 75 172 -66 38 6 11 36 14 29 38 8 58 36 11 43 -0.24 -117 0 0 37 36 5 8 21 10.4 75 176 -65 38 31 52 36 40 33 38 34 39 36 37 48 -0.24 -116 0 0 38 1 26 8 21 2.8 75 179 -64 38 57 1 37 6 5 38 59 47 37 3 20 -0.24 -115 0 0 38 26 14 8 20 55.3 74 183 -63 39 21 38 37 31 5 39 24 24 37 28 21 -0.24 -114 0 0 38 50 30 8 20 47.8 74 186 -63 39 45 42 37 55 33 39 48 28 37 52 49 -0.24 -113 0 0 39 14 14 8 20 40.4 73 189 -62 40 9 15 38 19 28 40 12 0 38 16 45 -0.24 -112 0 0 39 37 27 8 20 33.1 73 192 -61 40 32 16 38 42 52 40 35 0 38 40 9 -0.24 -111 0 0 40 0 7 8 20 25.9 72 194 -60 40 54 45 39 5 43 40 57 28 39 3 1 -0.24 -110 0 0 40 22 16 8 20 18.8 72 197 -60 41 16 42 39 28 3 41 19 25 39 25 22 -0.24 -109 0 0 40 43 53 8 20 11.7 71 199 -59 41 38 7 39 49 51 41 40 50 39 47 10 -0.24 -108 0 0 41 4 58 8 20 4.8 71 202 -58 41 59 2 40 11 8 42 1 44 40 8 28 -0.24 -107 0 0 41 25 33 8 19 57.9 70 204 -57 42 19 25 40 31 54 42 22 7 40 29 14 -0.24 -106 0 0 41 45 36 8 19 51.1 69 206 -57 42 39 18 40 52 8 42 41 58 40 49 29 -0.24 -105 0 0 42 5 9 8 19 44.4 69 208 -56 42 58 40 41 11 52 43 1 20 41 9 13 -0.24 -104 0 0 42 24 11 8 19 37.8 68 210 -55 43 17 31 41 31 5 43 20 10 41 28 26 -0.24 -103 0 0 42 42 43 8 19 31.2 67 212 -54 43 35 52 41 49 47 43 38 31 41 47 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Uncertainty in time = +/- 1 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: TYC 1797-01026-1 * constellation : Aries * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 03 25 38.5377 DE: +22 38 13.724 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 03 25 38.5377 DE: +22 38 13.724 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (409) Aspasia asteroid class: approx. diameter [km]: 176 approx. diameter ["]: 0.136 distance from Earth [AU]: 1.79120 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#123 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): 0.008", 0.001", 87.124° remarks: * orbital elements for (409)Aspasia : Mean anomaly = 171.1269927465 deg Arg. of pericenter = 355.0355253817 deg Long. of node = 242.0521941807 deg Inclination = 11.2801424206 deg Eccentricity = 0.0720529990 Semimajor axis = 2.5779292658 AU Perihelion dist = 2.3921817310 AU Mag: H = 7.70, G = 0.29 Epoch of elements : MJD 60251.34854167 TDT (2023 Nov 03.3485) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1232023Oct09,13.93,2023,11,3,8.367448,-0.107669,0.205094,-6.327711,-3.320077,-0.001343,-0.000730,0.000001,0.000000 -116.0903,22.7222,50.38,-15.02,False TYC 1797-01026-1,3.42737158,22.6371456,0.00,11.91,0.00,0.0,0,,3.45082488,22.7221547,0.61,0.00,0,0,0 409,Aspasia,11.61,176.300,1.7912,0,0,-2.245,-16.30,,11.4,0 0,171.0440,2023,11,3,355.0355,242.0522,11.2801,0.07205,2.57793,2.39218,7.70,5.0,0.15 1.025,0.0077,0.0011,87,0.0078,Known errors,-1.00,0,-1,-1 20231103_1026-1,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org