IOTA/IOTA-ES occultation update for (7641) 1986 TT6 / TYC 1813-00457-1 event on 2022 Oct 29, 09:58 UT Visible from Canada Summary ------- On 2022 Oct 29 UT, the 71.7 km diameter asteroid (7641) 1986 TT6 will occult a 11.1 mag star in the constellation Taurus for observers along a path across Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.54 mag to 16.58 mag (the magnitude of the asteroid) for at most 4.180 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: 53 * date and approx. time of event: 2022 Oct 29, 09:52 - 2022 Oct 29, 10:04 * geocentric midpoint of event [JD]: 2459881.91569862 * magnitude of target star: 11.05 * magnitude drop [mag]: 5.54 * estimated maximum duration [s]: 4.180 * Moon: 20 % sunlit, 155° distance * Sun: 152° distance * rough path description: Canada The occultation path -------------------- * approximate projected width [km]: 77 * 1 sigma uncertainty interval [path widths]: +/- 1.19 * 1 sigma uncertainty interval [seconds]: +/- 4.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.030, +/- 0.022) * 1 sigma uncertainty ellipse (major, minor, PA): (0.031", 0.020", 113°) * approx speed of asteroid's shadow [km/s]: 17.1540 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1813-00457-1 by 7641 1986 TT6 on 2022 Oct 29 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 ' " Longitude Longitude Longitude Longitude 148 16 24 -12 0 0 10 4 21.1 1 65 -28 ... .. .. 149 5 42 ... .. .. 150 59 56 .... 150 22 19 -11 0 0 10 4 20.6 3 65 -31 149 34 34 151 9 15 147 36 57 152 58 23 -0.28 Latitude Latitude Latitude Latitude 151 0 0 -10 41 20 10 4 20.3 4 65 -31 -10 17 59 -11 4 37 - 9 21 54 -11 59 58 -0.38 152 0 0 -10 10 55 10 4 19.8 5 64 -32 - 9 47 27 -10 34 20 - 8 51 4 -11 29 59 -0.37 153 0 0 - 9 39 41 10 4 19.1 6 64 -34 - 9 16 4 -10 3 13 - 8 19 23 -10 59 10 -0.37 154 0 0 - 9 7 36 10 4 18.2 7 64 -35 - 8 43 52 - 9 31 16 - 7 46 52 -10 27 31 -0.37 155 0 0 - 8 34 41 10 4 17.2 8 64 -36 - 8 10 49 - 8 58 29 - 7 13 30 - 9 55 2 -0.37 156 0 0 - 8 0 56 10 4 16.0 9 64 -37 - 7 36 55 - 8 24 51 - 6 39 17 - 9 21 44 -0.37 157 0 0 - 7 26 20 10 4 14.6 10 64 -38 - 7 2 12 - 7 50 24 - 6 4 13 - 8 47 36 -0.38 158 0 0 - 6 50 55 10 4 13.1 11 64 -39 - 6 26 38 - 7 15 7 - 5 28 19 - 8 12 38 -0.38 159 0 0 - 6 14 39 10 4 11.5 13 63 -40 - 5 50 14 - 6 39 0 - 4 51 34 - 7 36 51 -0.38 160 0 0 - 5 37 34 10 4 9.6 14 63 -42 - 5 13 0 - 6 2 3 - 4 14 0 - 7 0 14 -0.38 161 0 0 - 4 59 40 10 4 7.6 15 63 -43 - 4 34 57 - 5 24 17 - 3 35 35 - 6 22 49 -0.38 162 0 0 - 4 20 56 10 4 5.4 16 63 -44 - 3 56 5 - 4 45 42 - 2 56 21 - 5 44 34 -0.38 163 0 0 - 3 41 23 10 4 3.0 17 63 -45 - 3 16 23 - 4 6 19 - 2 16 19 - 5 5 31 -0.38 164 0 0 - 3 1 3 10 4 0.5 18 63 -46 - 2 35 53 - 3 26 7 - 1 35 27 - 4 25 40 -0.38 165 0 0 - 2 19 54 10 3 57.7 20 63 -47 - 1 54 36 - 2 45 7 - 0 53 47 - 3 45 2 -0.38 166 0 0 - 1 37 58 10 3 54.8 21 63 -49 - 1 12 31 - 2 3 20 - 0 11 20 - 3 3 36 -0.38 167 0 0 - 0 55 16 10 3 51.7 22 63 -50 - 0 29 39 - 1 20 47 0 31 53 - 2 21 24 -0.38 168 0 0 - 0 11 47 10 3 48.4 23 63 -51 0 13 58 - 0 37 27 1 15 53 - 1 38 26 -0.38 169 0 0 0 32 26 10 3 45.0 24 64 -52 0 58 21 0 6 37 2 0 38 - 0 54 43 -0.38 170 0 0 1 17 23 10 3 41.3 26 64 -53 1 43 27 0 51 25 2 46 7 - 0 10 16 -0.38 171 0 0 2 3 4 10 3 37.5 27 64 -54 2 29 17 1 36 57 3 32 19 0 34 54 -0.38 172 0 0 2 49 27 10 3 33.5 28 64 -56 3 15 49 2 23 10 4 19 13 1 20 47 -0.38 173 0 0 3 36 30 10 3 29.3 29 64 -57 4 3 2 3 10 5 5 6 48 2 7 20 -0.38 174 0 0 4 24 13 10 3 24.9 31 64 -58 4 50 54 3 57 39 5 55 3 2 54 33 -0.38 175 0 0 5 12 35 10 3 20.3 32 65 -59 5 39 24 4 45 52 6 43 55 3 42 25 -0.38 176 0 0 6 1 33 10 3 15.6 33 65 -60 6 28 32 5 34 41 7 33 25 4 30 54 -0.38 177 0 0 6 51 7 10 3 10.7 34 65 -62 7 18 14 6 24 6 8 23 29 5 19 58 -0.38 178 0 0 7 41 14 10 3 5.6 35 66 -63 8 8 30 7 14 5 9 14 6 6 9 37 -0.38 179 0 0 8 31 54 10 3 0.3 37 66 -64 8 59 18 8 4 36 10 5 15 6 59 48 -0.38 180 0 0 9 23 3 10 2 54.8 38 67 -65 9 50 36 8 55 37 10 56 54 7 50 30 -0.38 -179 0 0 10 14 41 10 2 49.2 39 67 -66 10 42 23 9 47 7 11 49 0 8 41 40 -0.38 -178 0 0 11 6 45 10 2 43.5 40 68 -67 11 34 35 10 39 3 12 41 32 9 33 18 -0.38 -177 0 0 11 59 14 10 2 37.6 42 68 -68 12 27 11 11 31 23 13 34 28 10 25 20 -0.38 -176 0 0 12 52 4 10 2 31.5 43 69 -69 13 20 9 12 24 6 14 27 44 11 17 45 -0.38 -175 0 0 13 45 14 10 2 25.3 44 69 -70 14 13 26 13 17 9 15 21 20 12 10 31 -0.38 -174 0 0 14 38 42 10 2 18.9 45 70 -71 15 7 1 14 10 30 16 15 13 13 3 35 -0.38 -173 0 0 15 32 25 10 2 12.5 46 71 -72 16 0 51 15 4 6 17 9 19 13 56 55 -0.38 -172 0 0 16 26 20 10 2 5.9 48 72 -73 16 54 53 15 57 55 18 3 37 14 50 29 -0.38 -171 0 0 17 20 26 10 1 59.2 49 73 -74 17 49 5 16 51 54 18 58 5 15 44 15 -0.38 -170 0 0 18 14 40 10 1 52.3 50 74 -74 18 43 25 17 46 2 19 52 39 16 38 9 -0.38 -169 0 0 19 8 58 10 1 45.4 51 75 -75 19 37 49 18 40 15 20 47 17 17 32 10 -0.38 -168 0 0 20 3 20 10 1 38.4 52 76 -75 20 32 16 19 34 32 21 41 56 18 26 14 -0.39 -167 0 0 20 57 41 10 1 31.3 53 77 -76 21 26 42 20 28 48 22 36 34 19 20 20 -0.39 -166 0 0 21 52 0 10 1 24.1 54 78 -76 22 21 5 21 23 3 23 31 8 20 14 24 -0.39 -165 0 0 22 46 13 10 1 16.8 55 80 -76 23 15 22 22 17 12 24 25 36 21 8 25 -0.39 -164 0 0 23 40 19 10 1 9.5 56 81 -76 24 9 32 23 11 15 25 19 54 22 2 19 -0.39 -163 0 0 24 34 14 10 1 2.2 57 83 -76 25 3 30 24 5 7 26 14 0 22 56 4 -0.39 -162 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49 34 3 13 -0.40 -149 0 0 36 28 41 9 59 18.9 67 116 -67 36 57 50 35 59 40 38 8 5 34 50 53 -0.40 -148 0 0 37 15 27 9 59 11.8 67 119 -66 37 44 33 36 46 30 38 54 38 35 37 53 -0.40 -147 0 0 38 1 31 9 59 4.8 68 122 -65 38 30 32 37 32 39 39 40 26 36 24 11 -0.40 -146 0 0 38 46 51 9 58 57.9 68 125 -64 39 15 47 38 18 3 40 25 30 37 9 47 -0.40 -145 0 0 39 31 26 9 58 51.0 68 129 -63 40 0 17 39 2 44 41 9 47 37 54 39 -0.40 -144 0 0 40 15 16 9 58 44.2 68 132 -62 40 44 1 39 46 38 41 53 16 38 38 47 -0.40 -143 0 0 40 58 18 9 58 37.6 68 135 -61 41 26 57 40 29 47 42 35 58 39 22 10 -0.40 -142 0 0 41 40 33 9 58 31.0 68 138 -60 42 9 6 41 12 8 43 17 52 40 4 46 -0.40 -141 0 0 42 22 1 9 58 24.5 68 141 -59 42 50 27 41 53 42 43 58 56 40 46 35 -0.40 -140 0 0 43 2 40 9 58 18.1 68 145 -58 43 30 59 42 34 28 44 39 11 41 27 37 -0.40 -139 0 0 43 42 30 9 58 11.8 68 148 -57 44 10 42 43 14 26 45 18 36 42 7 52 -0.40 -138 0 0 44 21 32 9 58 5.6 68 151 -56 44 49 36 43 53 35 45 57 11 42 47 18 -0.40 -137 0 0 44 59 44 9 57 59.6 67 154 -56 45 27 40 44 31 55 46 34 57 43 25 56 -0.40 -136 0 0 45 37 7 9 57 53.6 67 156 -55 46 4 55 45 9 26 47 11 52 44 3 46 -0.40 -135 0 0 46 13 40 9 57 47.7 67 159 -54 46 41 20 45 46 7 47 47 57 44 40 47 -0.40 -134 0 0 46 49 25 9 57 42.0 66 162 -53 47 16 57 46 22 0 48 23 12 45 16 59 -0.40 -133 0 0 47 24 20 9 57 36.3 66 164 -52 47 51 43 46 57 4 48 57 38 45 52 23 -0.40 -132 0 0 47 58 27 9 57 30.8 66 167 -51 48 25 41 47 31 20 49 31 15 46 26 59 -0.40 -131 0 0 48 31 45 9 57 25.3 65 169 -50 48 58 51 48 4 47 50 4 2 47 0 46 -0.40 -130 0 0 49 4 16 9 57 20.0 65 172 -50 49 31 12 48 37 26 50 36 1 47 33 46 -0.40 -129 0 0 49 35 58 9 57 14.7 64 174 -49 50 2 45 49 9 17 51 7 12 48 5 59 -0.40 -128 0 0 50 6 53 9 57 9.6 64 176 -48 50 33 31 49 40 22 51 37 35 48 37 24 -0.40 -127 0 0 50 37 1 9 57 4.6 64 178 -47 51 3 30 50 10 39 52 7 12 49 8 3 -0.40 -126 0 0 51 6 23 9 56 59.6 63 180 -46 51 32 43 50 40 10 52 36 2 49 37 56 -0.40 -125 0 0 51 35 0 9 56 54.8 63 182 -46 52 1 10 51 8 56 53 4 6 50 7 3 -0.40 -124 0 0 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59 34 59 -0.40 - 35 0 0 60 38 34 9 53 16.9 21 283 1 61 0 51 60 16 20 61 54 21 59 23 28 -0.40 - 34 0 0 60 26 55 9 53 15.6 20 283 1 60 49 19 60 4 36 61 43 3 59 11 30 -0.40 - 33 0 0 60 14 49 9 53 14.3 20 284 2 60 37 19 59 52 23 61 31 18 58 59 3 -0.40 - 32 0 0 60 2 14 9 53 13.0 19 285 3 60 24 50 59 39 42 61 19 5 58 46 7 -0.40 - 31 0 0 59 49 11 9 53 11.8 19 286 3 60 11 53 59 26 32 61 6 24 58 32 42 -0.40 - 30 0 0 59 35 38 9 53 10.5 18 287 4 59 58 27 59 12 53 60 53 14 58 18 46 -0.40 - 29 0 0 59 21 34 9 53 9.3 18 288 4 59 44 31 58 58 42 60 39 35 58 4 20 -0.40 - 28 0 0 59 7 0 9 53 8.2 17 289 5 59 30 4 58 44 1 60 25 25 57 49 22 -0.40 - 27 0 0 58 51 55 9 53 7.0 16 290 5 59 15 6 58 28 48 60 10 45 57 33 52 -0.40 - 26 0 0 58 36 18 9 53 5.9 16 290 6 58 59 36 58 13 4 59 55 34 57 17 50 -0.41 - 25 0 0 58 20 7 9 53 4.8 15 291 6 58 43 33 57 56 46 59 39 50 57 1 14 -0.41 - 24 0 0 58 3 24 9 53 3.7 15 292 7 58 26 57 57 39 54 59 23 33 56 44 4 -0.41 - 23 0 0 57 46 6 9 53 2.6 14 293 8 58 9 48 57 22 28 59 6 43 56 26 19 -0.41 - 22 0 0 57 28 13 9 53 1.6 13 294 8 57 52 3 57 4 28 58 49 19 56 7 59 -0.41 - 21 0 0 57 9 45 9 53 0.6 13 295 9 57 33 44 56 45 51 58 31 19 55 49 3 -0.41 - 20 0 0 56 50 40 9 52 59.6 12 296 9 57 14 48 56 26 38 58 12 44 55 29 30 -0.41 - 19 0 0 56 30 59 9 52 58.7 12 296 10 56 55 15 56 6 47 57 53 32 55 9 19 -0.41 - 18 0 0 56 10 39 9 52 57.8 11 297 11 56 35 4 55 46 19 57 33 43 54 48 30 -0.41 - 17 0 0 55 49 40 9 52 57.0 10 298 11 56 14 14 55 25 12 57 13 16 54 27 1 -0.42 - 16 0 0 55 28 2 9 52 56.1 10 299 12 55 52 46 55 3 24 56 52 9 54 4 53 -0.42 - 15 0 0 55 5 44 9 52 55.4 9 300 13 55 30 36 54 40 57 56 30 23 53 42 3 -0.42 - 14 0 0 54 42 45 9 52 54.6 8 301 13 55 7 46 54 17 48 56 7 56 53 18 32 -0.42 - 13 0 0 54 19 3 9 52 54.0 8 301 14 54 44 14 53 53 57 55 44 47 52 54 19 -0.43 - 12 0 0 53 54 38 9 52 53.3 7 302 15 54 19 59 53 29 22 55 20 56 52 29 22 -0.43 - 11 0 0 53 29 30 9 52 52.7 6 303 15 53 55 1 53 4 4 54 56 21 52 3 41 -0.44 - 10 0 0 53 3 37 9 52 52.2 5 304 16 53 29 18 52 38 2 54 31 2 51 37 15 -0.44 - 9 0 0 52 36 59 9 52 51.7 5 305 17 53 2 50 52 11 14 54 4 58 51 10 4 -0.45 - 8 0 0 52 9 34 9 52 51.3 4 305 18 52 35 35 51 43 39 53 38 8 50 42 6 -0.47 - 7 0 0 51 41 22 9 52 51.0 3 306 18 52 7 33 51 15 17 53 10 31 50 13 21 -0.49 - 6 0 0 51 12 23 9 52 50.7 2 307 19 51 38 44 50 46 8 52 42 6 49 43 48 -0.53 - 5 0 0 50 42 35 9 52 50.5 2 308 20 51 9 6 50 16 10 52 12 53 49 13 26 -0.61 - 4 0 0 50 11 57 9 52 50.4 1 309 21 50 38 38 49 45 22 51 42 50 .. .. .. -0.87 Uncertainty in time = +/- 5 secs Prediction of 2022 Oct 17.0 Data for the target star ------------------------ * name: TYC 1813-00457-1 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 02 19.8499 DE: +24 07 45.997 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 02 19.8499 DE: +24 07 45.998 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (7641) 1986 TT6 asteroid class: approx. diameter [km]: 72 approx. diameter ["]: 0.024 distance from Earth [AU]: 4.13410 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 date of fit: 2022 Sep 21 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): 0.031", 0.020", 113.173° remarks: * orbital elements for (7641)1986 TT6 : Mean anomaly = 312.2246838043 deg Arg. of pericenter = 227.7412292108 deg Long. of node = 242.0623567355 deg Inclination = 34.6918716634 deg Eccentricity = 0.0544401745 Semimajor axis = 5.2154875737 AU Perihelion dist = 4.9315555199 AU Mag: H = 9.55, G = 0.15 Epoch of elements : MJD 59881.41583333 TDT (2022 Oct 29.4158) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492022Sep21,4.18,2022,10,29,9.976767,-0.212775,0.299772,-7.935579,-5.547230,-0.002684,-0.000851,0.000001,0.000000 -126.4417,24.1933,26.28,-13.51,False TYC 1813-00457-1,4.03884720,24.1294438,0.00,11.05,0.00,0.0,0,,4.06174054,24.1932903,5.53,0.00,0,0,0 7641,1986 TT6,16.58,71.7,4.1341,0,0,-1.233,-11.80,,4.8,0 0,312.1903,2022,10,29,227.7412,242.0624,34.6919,0.05444,5.21549,4.93156,9.55,5.0,0.15 2.195,0.0313,0.0197,113,0.0286,Known errors,-1.00,-1,-1,-1 20221029_0457-1,59868.96 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Oct 16, 23:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org