IOTA/IOTA-ES occultation update for (2022) West / TYC 6871-01387-1 event on 2024 Oct 07, 07:53 UT Visible from Summary ------- On 2024 Oct 07 UT, the 12.3230024156067 km diameter asteroid (2022) West will occult a 8.6 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.45 mag to 17.07 mag (the magnitude of the asteroid) for at most 0.670 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: 89 * date and approx. time of event: 2024 Oct 07, 07:48 - 2024 Oct 07, 07:59 * geocentric midpoint of event [JD]: 2460590.82897505 * magnitude of target star: 8.62 * magnitude drop [mag]: 8.45 * estimated maximum duration [s]: 0.670 * Moon: 18 % sunlit, 35° distance * Sun: 85° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 14 * 1 sigma uncertainty interval [path widths]: +/- 0.53 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.003", 88°) * approx speed of asteroid's shadow [km/s]: 18.9568 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6871-01387-1 by 2022 West on 2024 Oct 7 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 62 0 0 7 31 29 7 48 31.4 0 119 77 7 27 16 7 35 41 7 22 45 7 40 13 .... 63 0 0 6 59 15 7 48 31.5 1 119 77 6 55 3 7 3 26 6 50 32 7 7 57 -0.10 64 0 0 6 27 24 7 48 31.7 2 119 77 6 23 13 6 31 35 6 18 44 6 36 5 -0.23 65 0 0 5 55 59 7 48 32.1 4 119 77 5 51 48 6 0 9 5 47 20 6 4 38 -0.28 66 0 0 5 24 58 7 48 32.6 5 119 77 5 20 49 5 29 8 5 16 21 5 33 36 -0.31 67 0 0 4 54 24 7 48 33.2 6 119 77 4 50 15 4 58 32 4 45 48 5 3 0 -0.33 68 0 0 4 24 16 7 48 34.0 7 119 77 4 20 8 4 28 24 4 15 41 4 32 51 -0.34 69 0 0 3 54 35 7 48 34.9 8 119 77 3 50 28 3 58 42 3 46 2 4 3 8 -0.35 70 0 0 3 25 23 7 48 36.0 9 119 76 3 21 16 3 29 29 3 16 52 3 33 54 -0.35 71 0 0 2 56 39 7 48 37.2 10 119 76 2 52 33 3 0 44 2 48 9 3 5 9 -0.36 72 0 0 2 28 24 7 48 38.5 11 119 75 2 24 19 2 32 29 2 19 56 2 36 52 -0.36 73 0 0 2 0 39 7 48 39.9 12 119 75 1 56 35 2 4 43 1 52 12 2 9 6 -0.36 74 0 0 1 33 24 7 48 41.5 14 120 74 1 29 20 1 37 27 1 24 59 1 41 49 -0.37 75 0 0 1 6 40 7 48 43.2 15 120 73 1 2 37 1 10 42 0 58 16 1 15 3 -0.37 76 0 0 0 40 26 7 48 45.0 16 120 73 0 36 25 0 44 28 0 32 5 0 48 49 -0.37 77 0 0 0 14 45 7 48 47.0 17 120 72 0 10 44 0 18 46 0 6 25 0 23 6 -0.37 78 0 0 - 0 10 25 7 48 49.0 18 120 71 - 0 14 25 - 0 6 24 - 0 18 43 - 0 2 6 -0.38 79 0 0 - 0 35 2 7 48 51.2 19 120 70 - 0 39 1 - 0 31 2 - 0 43 19 - 0 26 44 -0.38 80 0 0 - 0 59 6 7 48 53.5 20 120 69 - 1 3 5 - 0 55 7 - 1 7 22 - 0 50 50 -0.38 81 0 0 - 1 22 38 7 48 55.9 21 120 68 - 1 26 36 - 1 18 39 - 1 30 52 - 1 14 23 -0.38 82 0 0 - 1 45 36 7 48 58.4 22 120 67 - 1 49 33 - 1 41 38 - 1 53 48 - 1 37 23 -0.38 83 0 0 - 2 8 0 7 49 1.1 23 120 66 - 2 11 57 - 2 4 3 - 2 16 11 - 1 59 49 -0.38 84 0 0 - 2 29 51 7 49 3.8 24 120 66 - 2 33 47 - 2 25 55 - 2 38 1 - 2 21 41 -0.38 85 0 0 - 2 51 8 7 49 6.7 25 120 65 - 2 55 3 - 2 47 12 - 2 59 16 - 2 42 59 -0.38 86 0 0 - 3 11 50 7 49 9.6 26 120 64 - 3 15 45 - 3 7 55 - 3 19 57 - 3 3 42 -0.39 87 0 0 - 3 31 57 7 49 12.7 27 120 63 - 3 35 52 - 3 28 3 - 3 40 3 - 3 23 51 -0.39 88 0 0 - 3 51 30 7 49 15.8 28 120 62 - 3 55 24 - 3 47 37 - 3 59 35 - 3 43 26 -0.39 89 0 0 - 4 10 29 7 49 19.1 30 120 61 - 4 14 21 - 4 6 36 - 4 18 31 - 4 2 25 -0.39 90 0 0 - 4 28 52 7 49 22.4 31 120 60 - 4 32 44 - 4 24 59 - 4 36 53 - 4 20 49 -0.39 91 0 0 - 4 46 39 7 49 25.9 32 120 59 - 4 50 31 - 4 42 48 - 4 54 40 - 4 38 39 -0.39 92 0 0 - 5 3 52 7 49 29.4 33 120 58 - 5 7 43 - 5 0 1 - 5 11 51 - 4 55 52 -0.39 93 0 0 - 5 20 29 7 49 33.0 34 121 57 - 5 24 20 - 5 16 39 - 5 28 27 - 5 12 31 -0.39 94 0 0 - 5 36 31 7 49 36.7 35 121 56 - 5 40 21 - 5 32 41 - 5 44 28 - 5 28 34 -0.39 95 0 0 - 5 51 57 7 49 40.5 36 121 55 - 5 55 47 - 5 48 8 - 5 59 53 - 5 44 1 -0.39 96 0 0 - 6 6 48 7 49 44.4 37 121 54 - 6 10 36 - 6 2 58 - 6 14 42 - 5 58 52 -0.39 97 0 0 - 6 21 2 7 49 48.4 38 121 53 - 6 24 51 - 6 17 14 - 6 28 56 - 6 13 8 -0.39 98 0 0 - 6 34 41 7 49 52.4 39 121 52 - 6 38 29 - 6 30 53 - 6 42 34 - 6 26 48 -0.39 99 0 0 - 6 47 44 7 49 56.6 40 121 51 - 6 51 32 - 6 43 57 - 6 55 36 - 6 39 52 -0.39 100 0 0 - 7 0 11 7 50 0.8 41 121 50 - 7 3 58 - 6 56 24 - 7 8 2 - 6 52 20 -0.40 101 0 0 - 7 12 3 7 50 5.0 41 122 49 - 7 15 49 - 7 8 16 - 7 19 53 - 7 4 12 -0.40 102 0 0 - 7 23 18 7 50 9.4 42 122 48 - 7 27 4 - 7 19 31 - 7 31 7 - 7 15 28 -0.40 103 0 0 - 7 33 57 7 50 13.8 43 122 47 - 7 37 43 - 7 30 11 - 7 41 46 - 7 26 8 -0.40 104 0 0 - 7 44 0 7 50 18.3 44 122 46 - 7 47 46 - 7 40 15 - 7 51 48 - 7 36 12 -0.40 105 0 0 - 7 53 27 7 50 22.9 45 123 45 - 7 57 13 - 7 49 42 - 8 1 14 - 7 45 40 -0.40 106 0 0 - 8 2 18 7 50 27.5 46 123 44 - 8 6 3 - 7 58 33 - 8 10 5 - 7 54 32 -0.40 107 0 0 - 8 10 34 7 50 32.2 47 123 43 - 8 14 18 - 8 6 49 - 8 18 19 - 8 2 47 -0.40 108 0 0 - 8 18 13 7 50 36.9 48 124 42 - 8 21 57 - 8 14 28 - 8 25 58 - 8 10 27 -0.40 109 0 0 - 8 25 15 7 50 41.8 49 124 41 - 8 28 59 - 8 21 31 - 8 33 0 - 8 17 30 -0.40 110 0 0 - 8 31 42 7 50 46.6 50 124 40 - 8 35 26 - 8 27 58 - 8 39 26 - 8 23 57 -0.40 111 0 0 - 8 37 33 7 50 51.6 51 125 39 - 8 41 16 - 8 33 49 - 8 45 17 - 8 29 48 -0.40 112 0 0 - 8 42 47 7 50 56.6 52 125 38 - 8 46 31 - 8 39 3 - 8 50 31 - 8 35 3 -0.40 113 0 0 - 8 47 25 7 51 1.6 52 126 37 - 8 51 9 - 8 43 42 - 8 55 9 - 8 39 42 -0.40 114 0 0 - 8 51 27 7 51 6.7 53 126 36 - 8 55 11 - 8 47 44 - 8 59 10 - 8 43 44 -0.40 115 0 0 - 8 54 53 7 51 11.9 54 127 35 - 8 58 36 - 8 51 10 - 9 2 36 - 8 47 10 -0.40 116 0 0 - 8 57 43 7 51 17.1 55 128 34 - 9 1 26 - 8 54 0 - 9 5 26 - 8 50 0 -0.40 117 0 0 - 8 59 57 7 51 22.4 56 128 33 - 9 3 40 - 8 56 14 - 9 7 39 - 8 52 14 -0.40 118 0 0 - 9 1 34 7 51 27.7 57 129 32 - 9 5 17 - 8 57 51 - 9 9 16 - 8 53 51 -0.40 119 0 0 - 9 2 35 7 51 33.1 57 130 31 - 9 6 18 - 8 58 52 - 9 10 17 - 8 54 52 -0.40 120 0 0 - 9 3 0 7 51 38.5 58 131 30 - 9 6 43 - 8 59 17 - 9 10 42 - 8 55 17 -0.40 121 0 0 - 9 2 48 7 51 43.9 59 132 28 - 9 6 31 - 8 59 5 - 9 10 30 - 8 55 6 -0.40 122 0 0 - 9 2 0 7 51 49.4 60 133 27 - 9 5 43 - 8 58 17 - 9 9 43 - 8 54 18 -0.40 123 0 0 - 9 0 36 7 51 55.0 60 134 26 - 9 4 19 - 8 56 53 - 9 8 19 - 8 52 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21 4 50 32 5 7 51 -0.40 174 0 0 5 30 26 7 56 57.0 47 218 -27 5 26 15 5 34 37 5 21 45 5 39 7 -0.40 175 0 0 6 2 8 7 57 2.2 46 218 -28 5 57 56 6 6 20 5 53 26 6 10 51 -0.40 176 0 0 6 34 17 7 57 7.3 45 219 -29 6 30 4 6 38 30 6 25 33 6 43 1 -0.40 177 0 0 7 6 51 7 57 12.4 43 219 -30 7 2 38 7 11 5 6 58 6 7 15 38 -0.40 178 0 0 7 39 51 7 57 17.3 42 220 -31 7 35 37 7 44 5 7 31 4 7 48 39 -0.40 179 0 0 8 13 14 7 57 22.2 41 220 -32 8 8 59 8 17 29 8 4 26 8 22 4 -0.40 180 0 0 8 47 1 7 57 27.0 40 221 -33 8 42 45 8 51 17 8 38 11 8 55 52 -0.40 -179 0 0 9 21 10 7 57 31.6 39 221 -34 9 16 53 9 25 26 9 12 18 9 30 2 -0.40 -178 0 0 9 55 40 7 57 36.2 38 222 -35 9 51 22 9 59 57 9 46 46 10 4 34 -0.40 -177 0 0 10 30 30 7 57 40.7 37 222 -36 10 26 12 10 34 48 10 21 35 10 39 25 -0.40 -176 0 0 11 5 39 7 57 45.0 36 223 -37 11 1 20 11 9 57 10 56 42 11 14 36 -0.40 -175 0 0 11 41 6 7 57 49.3 35 223 -38 11 36 46 11 45 25 11 32 8 11 50 4 -0.39 -174 0 0 12 16 49 7 57 53.4 34 224 -39 12 12 29 12 21 9 12 7 50 12 25 49 -0.39 -173 0 0 12 52 49 7 57 57.4 33 224 -40 12 48 28 12 57 10 12 43 48 13 1 50 -0.39 -172 0 0 13 29 3 7 58 1.2 31 224 -41 13 24 42 13 33 24 13 20 1 13 38 5 -0.39 -171 0 0 14 5 30 7 58 5.0 30 225 -42 14 1 8 14 9 52 13 56 27 14 14 33 -0.39 -170 0 0 14 42 9 7 58 8.6 29 225 -43 14 37 47 14 46 32 14 33 5 14 51 14 -0.39 -169 0 0 15 18 59 7 58 12.1 28 226 -44 15 14 36 15 23 22 15 9 54 15 28 5 -0.39 -168 0 0 15 55 59 7 58 15.5 27 226 -44 15 51 35 16 0 22 15 46 52 16 5 6 -0.39 -167 0 0 16 33 6 7 58 18.7 26 226 -45 16 28 43 16 37 30 16 23 59 16 42 14 -0.39 -166 0 0 17 10 21 7 58 21.8 25 227 -46 17 5 57 17 14 46 17 1 13 17 19 30 -0.39 -165 0 0 17 47 41 7 58 24.8 24 227 -47 17 43 17 17 52 6 17 38 32 17 56 51 -0.39 -164 0 0 18 25 6 7 58 27.6 22 228 -48 18 20 41 18 29 31 18 15 56 18 34 17 -0.39 -163 0 0 19 2 34 7 58 30.3 21 228 -49 18 58 8 19 6 59 18 53 23 19 11 45 -0.39 -162 0 0 19 40 3 7 58 32.8 20 228 -49 19 35 37 19 44 29 19 30 52 19 49 15 -0.39 -161 0 0 20 17 32 7 58 35.2 19 229 -50 20 13 6 20 21 59 20 8 21 20 26 45 -0.39 -160 0 0 20 55 1 7 58 37.5 18 229 -51 20 50 35 20 59 28 20 45 49 21 4 14 -0.39 -159 0 0 21 32 27 7 58 39.6 17 230 -52 21 28 1 21 36 54 21 23 14 21 41 41 -0.39 -158 0 0 22 9 50 7 58 41.6 16 230 -52 22 5 23 22 14 17 22 0 37 22 19 4 -0.39 -157 0 0 22 47 8 7 58 43.4 15 230 -53 22 42 41 22 51 35 22 37 54 22 56 22 -0.39 -156 0 0 23 24 20 7 58 45.1 13 231 -53 23 19 53 23 28 47 23 15 6 23 33 34 -0.39 -155 0 0 24 1 24 7 58 46.6 12 231 -54 23 56 57 24 5 51 23 52 10 24 10 39 -0.39 -154 0 0 24 38 20 7 58 48.1 11 232 -55 24 33 52 24 42 47 24 29 5 24 47 34 -0.39 -153 0 0 25 15 5 7 58 49.3 10 232 -55 25 10 38 25 19 33 25 5 51 25 24 20 -0.39 -152 0 0 25 51 40 7 58 50.5 9 233 -56 25 47 13 25 56 8 25 42 26 26 0 55 -0.39 -151 0 0 26 28 3 7 58 51.5 8 233 -56 26 23 36 26 32 30 26 18 49 26 37 17 -0.39 -150 0 0 27 4 12 7 58 52.4 7 233 -56 26 59 45 27 8 39 26 54 58 27 13 26 -0.39 -149 0 0 27 40 7 7 58 53.1 6 234 -57 27 35 40 27 44 34 27 30 54 27 49 21 -0.39 -148 0 0 28 15 46 7 58 53.7 5 234 -57 28 11 20 28 20 13 28 6 33 28 25 0 -0.40 -147 0 0 28 51 10 7 58 54.2 4 235 -58 28 46 43 28 55 36 28 41 57 29 0 23 -0.40 -146 0 0 29 26 15 7 58 54.6 3 235 -58 29 21 49 29 30 42 29 17 3 29 35 28 -0.40 -145 0 0 30 1 2 7 58 54.8 2 236 -58 29 56 36 30 5 28 29 51 51 30 10 15 -0.40 -144 0 0 30 35 30 7 58 54.9 1 236 -58 30 31 5 30 39 56 30 26 19 30 44 42 -0.41 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 6871-01387-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 43 46.0298 DE: -28 14 01.986 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 43 46.0296 DE: -28 14 01.987 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 8.6 * B mag [mag]: 9.2 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2022) West asteroid class: approx. diameter [km]: 12 approx. diameter ["]: 0.007 distance from Earth [AU]: 2.61280 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#63 date of fit: 2023 Apr 24 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", 0.003", 88.048° remarks: * orbital elements for (2022)West : Mean anomaly = 273.7001163494 deg Arg. of pericenter = 38.4625254450 deg Long. of node = 2.2659774312 deg Inclination = 5.6545304264 deg Eccentricity = 0.1165327913 Semimajor axis = 2.7065350533 AU Perihelion dist = 2.3911349688 AU Mag: H = 11.77, G = 0.15 Epoch of elements : MJD 60590.32897466 TDT (2024 Oct 07.3290) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#632023Apr24,0.67,2024,10,7,7.895401,-0.086558,0.364597,10.407728,2.482625,0.005720,0.000409,0.000000,0.000000 146.4421,-28.2104,58.50,-5.73,False TYC 6871-01387-1,18.72945275,-28.2338851,9.22,8.62,8.30,0.2,0,,18.75536826,-28.2104496,8.45,8.32,0,0,0 2022,West,17.07,12.702,2.6128,0,0,2.651,8.36,,1.0,0 0,273.6273,2024,10,7,38.4625,2.2660,5.6545,0.11653,2.70654,2.39113,11.76,5.0,0.15 1.537,0.0083,0.0032,88,0.0036,Known errors,0.91,0,-1,-1 20241007_1387-1,60140.62 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:48 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org