IOTA/IOTA-ES occultation update for (1695) Walbeck / TYC 5125-02774-1 event on 2024 Oct 16, 00:38 UT Visible from Summary ------- On 2024 Oct 16 UT, the 19.5439157135901 km diameter asteroid (1695) Walbeck will occult a 8.7 mag star in the constellation Scutum for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.40 mag to 17.06 mag (the magnitude of the asteroid) for at most 0.810 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: 97 * date and approx. time of event: 2024 Oct 16, 00:34 - 2024 Oct 16, 00:42 * geocentric midpoint of event [JD]: 2460599.52644175 * magnitude of target star: 8.66 * magnitude drop [mag]: 8.40 * estimated maximum duration [s]: 0.810 * Moon: 97 % sunlit, 81° distance * Sun: 79° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 0.39 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.002", 78°) * approx speed of asteroid's shadow [km/s]: 25.0292 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5125-02774-1 by 1695 Walbeck on 2024 Oct 16 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 161 0 0 28 43 18 0 34 5.7 0 97 52 28 37 27 28 49 10 28 32 52 28 53 45 .... 162 0 0 28 36 46 0 34 5.8 1 98 52 28 30 54 28 42 38 28 26 19 28 47 13 -0.21 163 0 0 28 30 5 0 34 5.9 2 98 52 28 24 13 28 35 57 28 19 38 28 40 32 -0.27 164 0 0 28 23 15 0 34 6.1 3 99 53 28 17 23 28 29 7 28 12 48 28 33 42 -0.30 165 0 0 28 16 16 0 34 6.4 4 99 53 28 10 24 28 22 8 28 5 48 28 26 43 -0.31 166 0 0 28 9 8 0 34 6.7 5 99 53 28 3 16 28 15 0 27 58 40 28 19 36 -0.32 167 0 0 28 1 52 0 34 7.1 6 100 53 27 55 59 28 7 44 27 51 24 28 12 20 -0.33 168 0 0 27 54 27 0 34 7.6 7 100 53 27 48 34 28 0 19 27 43 59 28 4 55 -0.33 169 0 0 27 46 53 0 34 8.1 8 101 53 27 41 1 27 52 46 27 36 25 27 57 22 -0.34 170 0 0 27 39 12 0 34 8.7 8 101 53 27 33 19 27 45 5 27 28 44 27 49 41 -0.34 171 0 0 27 31 22 0 34 9.4 9 102 53 27 25 29 27 37 15 27 20 54 27 41 51 -0.34 172 0 0 27 23 24 0 34 10.1 10 102 53 27 17 31 27 29 17 27 12 55 27 33 53 -0.34 173 0 0 27 15 18 0 34 10.9 11 103 54 27 9 25 27 21 11 27 4 49 27 25 48 -0.35 174 0 0 27 7 4 0 34 11.7 12 103 53 27 1 11 27 12 57 26 56 35 27 17 34 -0.35 175 0 0 26 58 43 0 34 12.7 13 104 53 26 52 49 27 4 36 26 48 13 27 9 13 -0.35 176 0 0 26 50 13 0 34 13.7 14 104 53 26 44 20 26 56 7 26 39 44 27 0 44 -0.35 177 0 0 26 41 37 0 34 14.7 15 105 53 26 35 43 26 47 30 26 31 7 26 52 7 -0.35 178 0 0 26 32 52 0 34 15.9 16 105 53 26 26 59 26 38 46 26 22 22 26 43 23 -0.35 179 0 0 26 24 1 0 34 17.1 17 106 53 26 18 7 26 29 55 26 13 31 26 34 32 -0.35 -180 0 0 26 15 2 0 34 18.3 18 106 53 26 9 8 26 20 56 26 4 32 26 25 33 -0.35 -179 0 0 26 5 57 0 34 19.7 18 107 53 26 0 3 26 11 51 25 55 26 26 16 28 -0.35 -178 0 0 25 56 44 0 34 21.1 19 107 53 25 50 50 26 2 38 25 46 13 26 7 16 -0.35 -177 0 0 25 47 25 0 34 22.5 20 108 52 25 41 31 25 53 19 25 36 54 25 57 57 -0.35 -176 0 0 25 37 59 0 34 24.1 21 108 52 25 32 5 25 43 54 25 27 28 25 48 31 -0.36 -175 0 0 25 28 27 0 34 25.7 22 108 52 25 22 33 25 34 21 25 17 56 25 38 59 -0.36 -174 0 0 25 18 48 0 34 27.4 23 109 51 25 12 54 25 24 43 25 8 17 25 29 21 -0.36 -173 0 0 25 9 4 0 34 29.1 24 109 51 25 3 9 25 14 59 24 58 32 25 19 36 -0.36 -172 0 0 24 59 13 0 34 30.9 25 110 51 24 53 19 25 5 8 24 48 41 25 9 46 -0.36 -171 0 0 24 49 17 0 34 32.8 26 110 50 24 43 22 24 55 12 24 38 45 24 59 50 -0.36 -170 0 0 24 39 15 0 34 34.8 27 111 50 24 33 20 24 45 10 24 28 43 24 49 48 -0.36 -169 0 0 24 29 8 0 34 36.8 28 111 50 24 23 13 24 35 3 24 18 35 24 39 41 -0.36 -168 0 0 24 18 55 0 34 38.9 28 112 49 24 13 0 24 24 50 24 8 23 24 29 28 -0.36 -167 0 0 24 8 37 0 34 41.0 29 113 49 24 2 42 24 14 33 23 58 5 24 19 11 -0.36 -166 0 0 23 58 15 0 34 43.2 30 113 48 23 52 20 24 4 10 23 47 42 24 8 48 -0.36 -165 0 0 23 47 48 0 34 45.5 31 114 48 23 41 52 23 53 43 23 37 14 23 58 21 -0.36 -164 0 0 23 37 16 0 34 47.8 32 114 47 23 31 20 23 43 11 23 26 42 23 47 50 -0.36 -163 0 0 23 26 39 0 34 50.2 33 115 47 23 20 44 23 32 35 23 16 6 23 37 13 -0.36 -162 0 0 23 15 59 0 34 52.7 34 115 46 23 10 4 23 21 55 23 5 26 23 26 33 -0.36 -161 0 0 23 5 15 0 34 55.2 35 116 46 22 59 19 23 11 10 22 54 41 23 15 49 -0.36 -160 0 0 22 54 27 0 34 57.8 36 116 45 22 48 31 23 0 22 22 43 53 23 5 1 -0.36 -159 0 0 22 43 35 0 35 0.5 37 117 45 22 37 39 22 49 31 22 33 1 22 54 9 -0.36 -158 0 0 22 32 40 0 35 3.2 38 117 44 22 26 44 22 38 36 22 22 6 22 43 15 -0.36 -157 0 0 22 21 42 0 35 6.0 39 118 43 22 15 46 22 27 38 22 11 8 22 32 17 -0.36 -156 0 0 22 10 41 0 35 8.9 39 119 43 22 4 45 22 16 37 22 0 7 22 21 15 -0.36 -155 0 0 21 59 37 0 35 11.8 40 119 42 21 53 41 22 5 33 21 49 3 22 10 12 -0.36 -154 0 0 21 48 31 0 35 14.7 41 120 41 21 42 35 21 54 27 21 37 56 21 59 5 -0.36 -153 0 0 21 37 22 0 35 17.8 42 121 41 21 31 26 21 43 18 21 26 48 21 47 57 -0.36 -152 0 0 21 26 11 0 35 20.8 43 121 40 21 20 15 21 32 7 21 15 37 21 36 46 -0.36 -151 0 0 21 14 59 0 35 24.0 44 122 39 21 9 3 21 20 55 21 4 24 21 25 34 -0.36 -150 0 0 21 3 44 0 35 27.2 45 123 39 20 57 48 21 9 41 20 53 10 21 14 20 -0.36 -149 0 0 20 52 29 0 35 30.4 46 123 38 20 46 33 20 58 25 20 41 54 21 3 4 -0.36 -148 0 0 20 41 12 0 35 33.7 47 124 37 20 35 16 20 47 8 20 30 38 20 51 47 -0.36 -147 0 0 20 29 54 0 35 37.1 48 125 36 20 23 58 20 35 51 20 19 20 20 40 29 -0.36 -146 0 0 20 18 36 0 35 40.5 48 126 36 20 12 40 20 24 32 20 8 1 20 29 11 -0.36 -145 0 0 20 7 17 0 35 44.0 49 127 35 20 1 21 20 13 13 19 56 42 20 17 52 -0.36 -144 0 0 19 55 58 0 35 47.5 50 127 34 19 50 2 20 1 54 19 45 23 20 6 33 -0.36 -143 0 0 19 44 38 0 35 51.1 51 128 33 19 38 42 19 50 35 19 34 4 19 55 14 -0.36 -142 0 0 19 33 19 0 35 54.7 52 129 33 19 27 23 19 39 16 19 22 45 19 43 54 -0.36 -141 0 0 19 22 1 0 35 58.4 53 130 32 19 16 5 19 27 57 19 11 26 19 32 36 -0.36 -140 0 0 19 10 43 0 36 2.1 54 131 31 19 4 47 19 16 39 19 0 8 19 21 18 -0.36 -139 0 0 18 59 26 0 36 5.8 54 132 30 18 53 30 19 5 22 18 48 51 19 10 1 -0.36 -138 0 0 18 48 10 0 36 9.6 55 133 29 18 42 14 18 54 6 18 37 35 18 58 45 -0.36 -137 0 0 18 36 55 0 36 13.5 56 134 29 18 30 59 18 42 52 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11 40 -0.37 - 85 0 0 10 56 3 0 39 55.2 56 241 -20 10 50 12 11 1 54 10 45 38 11 6 29 -0.37 - 84 0 0 10 51 4 0 39 59.1 55 242 -21 10 45 13 10 56 55 10 40 39 11 1 30 -0.37 - 83 0 0 10 46 16 0 40 3.0 55 243 -22 10 40 26 10 52 7 10 35 51 10 56 42 -0.37 - 82 0 0 10 41 40 0 40 6.9 54 244 -23 10 35 50 10 47 31 10 31 15 10 52 6 -0.37 - 81 0 0 10 37 16 0 40 10.7 53 245 -24 10 31 25 10 43 7 10 26 51 10 47 41 -0.37 - 80 0 0 10 33 3 0 40 14.4 52 246 -25 10 27 12 10 38 53 10 22 38 10 43 28 -0.37 - 79 0 0 10 29 1 0 40 18.1 51 247 -26 10 23 11 10 34 52 10 18 37 10 39 26 -0.37 - 78 0 0 10 25 12 0 40 21.8 50 247 -27 10 19 21 10 31 2 10 14 47 10 35 37 -0.37 - 77 0 0 10 21 34 0 40 25.4 49 248 -28 10 15 44 10 27 24 10 11 10 10 31 59 -0.37 - 76 0 0 10 18 8 0 40 29.0 48 249 -29 10 12 18 10 23 58 10 7 44 10 28 33 -0.37 - 75 0 0 10 14 54 0 40 32.5 47 249 -30 10 9 4 10 20 44 10 4 30 10 25 19 -0.37 - 74 0 0 10 11 52 0 40 36.0 47 250 -31 10 6 2 10 17 42 10 1 28 10 22 16 -0.37 - 73 0 0 10 9 2 0 40 39.4 46 250 -32 10 3 12 10 14 52 9 58 38 10 19 26 -0.37 - 72 0 0 10 6 24 0 40 42.8 45 251 -33 10 0 34 10 12 14 9 56 1 10 16 49 -0.37 - 71 0 0 10 3 59 0 40 46.1 44 252 -34 9 58 9 10 9 49 9 53 35 10 14 23 -0.37 - 70 0 0 10 1 45 0 40 49.3 43 252 -35 9 55 55 10 7 35 9 51 21 10 12 9 -0.37 - 69 0 0 9 59 44 0 40 52.5 42 253 -36 9 53 54 10 5 34 9 49 20 10 10 8 -0.37 - 68 0 0 9 57 54 0 40 55.6 41 253 -37 9 52 5 10 3 44 9 47 31 10 8 18 -0.37 - 67 0 0 9 56 18 0 40 58.7 40 253 -38 9 50 28 10 2 7 9 45 54 10 6 41 -0.37 - 66 0 0 9 54 53 0 41 1.7 39 254 -39 9 49 3 10 0 43 9 44 30 10 5 17 -0.37 - 65 0 0 9 53 41 0 41 4.7 38 254 -40 9 47 51 9 59 31 9 43 18 10 4 5 -0.37 - 64 0 0 9 52 41 0 41 7.6 37 255 -41 9 46 51 9 58 31 9 42 18 10 3 5 -0.37 - 63 0 0 9 51 53 0 41 10.4 36 255 -42 9 46 3 9 57 43 9 41 30 10 2 17 -0.37 - 62 0 0 9 51 18 0 41 13.1 35 255 -43 9 45 28 9 57 8 9 40 55 10 1 42 -0.37 - 61 0 0 9 50 55 0 41 15.8 34 256 -44 9 45 5 9 56 45 9 40 32 10 1 18 -0.37 - 60 0 0 9 50 44 0 41 18.5 33 256 -45 9 44 54 9 56 34 9 40 21 10 1 8 -0.37 - 59 0 0 9 50 46 0 41 21.0 32 256 -46 9 44 56 9 56 35 9 40 23 10 1 9 -0.37 - 58 0 0 9 50 59 0 41 23.5 31 257 -47 9 45 10 9 56 49 9 40 36 10 1 23 -0.37 - 57 0 0 9 51 26 0 41 25.9 30 257 -48 9 45 36 9 57 15 9 41 3 10 1 49 -0.37 - 56 0 0 9 52 4 0 41 28.3 29 257 -49 9 46 14 9 57 54 9 41 41 10 2 28 -0.37 - 55 0 0 9 52 55 0 41 30.6 28 258 -50 9 47 5 9 58 45 9 42 32 10 3 18 -0.37 - 54 0 0 9 53 58 0 41 32.8 27 258 -51 9 48 8 9 59 47 9 43 35 10 4 21 -0.37 - 53 0 0 9 55 13 0 41 34.9 27 258 -52 9 49 23 10 1 3 9 44 50 10 5 36 -0.37 - 52 0 0 9 56 40 0 41 37.0 26 258 -53 9 50 50 10 2 30 9 46 17 10 7 4 -0.37 - 51 0 0 9 58 19 0 41 39.0 25 259 -54 9 52 30 10 4 9 9 47 56 10 8 43 -0.37 - 50 0 0 10 0 11 0 41 40.9 24 259 -55 9 54 21 10 6 1 9 49 48 10 10 35 -0.37 - 49 0 0 10 2 14 0 41 42.8 23 259 -56 9 56 24 10 8 4 9 51 51 10 12 38 -0.37 - 48 0 0 10 4 30 0 41 44.5 22 259 -57 9 58 40 10 10 20 9 54 6 10 14 54 -0.38 - 47 0 0 10 6 57 0 41 46.2 21 260 -57 10 1 7 10 12 47 9 56 34 10 17 21 -0.38 - 46 0 0 10 9 36 0 41 47.8 20 260 -58 10 3 46 10 15 26 9 59 13 10 20 0 -0.38 - 45 0 0 10 12 27 0 41 49.4 19 260 -59 10 6 37 10 18 17 10 2 4 10 22 51 -0.38 - 44 0 0 10 15 30 0 41 50.8 18 260 -60 10 9 40 10 21 20 10 5 6 10 25 54 -0.38 - 43 0 0 10 18 44 0 41 52.2 17 260 -61 10 12 54 10 24 35 10 8 21 10 29 9 -0.38 - 42 0 0 10 22 10 0 41 53.5 16 261 -62 10 16 20 10 28 1 10 11 46 10 32 35 -0.38 - 41 0 0 10 25 48 0 41 54.8 15 261 -63 10 19 58 10 31 38 10 15 24 10 36 13 -0.38 - 40 0 0 10 29 37 0 41 55.9 14 261 -64 10 23 47 10 35 27 10 19 13 10 40 2 -0.38 - 39 0 0 10 33 37 0 41 57.0 13 261 -65 10 27 47 10 39 28 10 23 13 10 44 2 -0.38 - 38 0 0 10 37 49 0 41 58.0 12 261 -66 10 31 59 10 43 39 10 27 25 10 48 14 -0.38 - 37 0 0 10 42 12 0 41 58.9 11 262 -67 10 36 21 10 48 2 10 31 47 10 52 37 -0.38 - 36 0 0 10 46 46 0 41 59.8 10 262 -68 10 40 55 10 52 36 10 36 21 10 57 11 -0.38 - 35 0 0 10 51 31 0 42 0.5 9 262 -69 10 45 40 10 57 21 10 41 6 11 1 56 -0.38 - 34 0 0 10 56 27 0 42 1.2 8 262 -70 10 50 36 11 2 17 10 46 2 11 6 52 -0.39 - 33 0 0 11 1 33 0 42 1.8 7 262 -71 10 55 42 11 7 24 10 51 8 11 11 59 -0.39 - 32 0 0 11 6 51 0 42 2.3 6 263 -72 11 1 0 11 12 42 10 56 25 11 17 16 -0.39 - 31 0 0 11 12 18 0 42 2.7 5 263 -73 11 6 28 11 18 10 11 1 53 11 22 45 -0.40 - 30 0 0 11 17 57 0 42 3.1 4 263 -74 11 12 6 11 23 48 11 7 31 11 28 23 -0.40 - 29 0 0 11 23 46 0 42 3.4 3 263 -75 11 17 55 11 29 37 11 13 20 11 34 12 -0.42 - 28 0 0 11 29 45 0 42 3.6 2 263 -76 11 23 53 11 35 36 11 19 19 11 40 11 -0.44 - 27 0 0 11 35 54 0 42 3.7 1 264 -77 11 30 2 11 41 45 11 25 28 11 46 20 -0.52 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 5125-02774-1 * constellation : Scutum * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 41 34.4962 DE: -06 03 37.875 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 41 34.4962 DE: -06 03 37.875 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 8.7 * B mag [mag]: 9.9 * Diameter [mas]: 0.40 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1695) Walbeck asteroid class: approx. diameter [km]: 20 approx. diameter ["]: 0.013 distance from Earth [AU]: 2.10640 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 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): 0.013", 0.002", 77.557° remarks: * orbital elements for (1695)Walbeck : Mean anomaly = 332.7878018136 deg Arg. of pericenter = 139.5460559421 deg Long. of node = 218.3734227072 deg Inclination = 16.6852634055 deg Eccentricity = 0.2889708031 Semimajor axis = 2.7845013438 AU Perihelion dist = 1.9798617542 AU Mag: H = 12.57, G = 0.15 Epoch of elements : MJD 60599.02644183 TDT (2024 Oct 16.0264) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr24,0.81,2024,10,16,0.634602,0.051075,0.341958,13.970325,-2.099198,0.005254,0.000742,0.000000,0.000000 -113.8255,-6.0364,166.87,-9.00,False TYC 5125-02774-1,18.69291565,-6.0605208,9.86,8.66,8.01,0.4,0,,18.71490905,-6.0363820,8.40,8.60,0,0,0 1695,Walbeck,17.06,20.155,2.1064,0,0,3.910,-8.76,,1.0,0 0,332.5701,2024,10,15,139.5461,218.3734,16.6853,0.28897,2.78450,1.97986,12.57,5.0,0.15 1.391,0.0133,0.0021,78,0.0052,Known errors,0.83,0,-1,-1 20241016_2774-1,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org