IOTA/IOTA-ES occultation update for (187) Lamberta / TYC 7393-00380-1 event on 2023 Feb 18, 19:34 UT Visible from Australia Summary ------- On 2023 Feb 18 UT, the 134.6 km diameter asteroid (187) Lamberta will occult a 9.5 mag star in the constellation Sagittarius for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.59 mag to 13.07 mag (the magnitude of the asteroid) for at most 3.560 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 Feb 18, 19:31 - 2023 Feb 18, 19:37 * geocentric midpoint of event [JD]: 2459994.31566638 * magnitude of target star: 9.52 * magnitude drop [mag]: 3.59 * estimated maximum duration [s]: 3.560 * Moon: 4 % sunlit, 33° distance * Sun: 55° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 145 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.003", 90°) * approx speed of asteroid's shadow [km/s]: 37.7812 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7393-00380-1 by 187 Lamberta on 2023 Feb 18 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 96 0 0 -14 58 56 19 31 56.6 0 121 -53 -15 45 14 .. .. .. -15 49 27 .. .. .. .... 97 0 0 -15 34 42 19 31 56.7 1 121 -52 -16 21 7 -14 48 35 -16 25 19 -14 44 25 0.37 98 0 0 -16 10 38 19 31 56.8 2 121 -51 -16 57 8 -15 24 25 -17 1 21 -15 20 15 0.39 99 0 0 -16 46 42 19 31 57.0 3 121 -50 -17 33 18 -16 0 25 -17 37 32 -15 56 14 0.39 100 0 0 -17 22 54 19 31 57.2 5 120 -49 -18 9 35 -16 36 32 -18 13 49 -16 32 21 0.40 101 0 0 -17 59 12 19 31 57.6 6 120 -48 -18 45 58 -17 12 45 -18 50 12 -17 8 34 0.40 102 0 0 -18 35 35 19 31 57.9 7 120 -47 -19 22 25 -17 49 4 -19 26 40 -17 44 52 0.40 103 0 0 -19 12 2 19 31 58.4 8 119 -46 -19 58 56 -18 25 27 -20 3 11 -18 21 15 0.40 104 0 0 -19 48 32 19 31 58.9 9 119 -45 -20 35 29 -19 1 52 -20 39 45 -18 57 40 0.40 105 0 0 -20 25 2 19 31 59.5 10 119 -43 -21 12 3 -19 38 20 -21 16 19 -19 34 7 0.40 106 0 0 -21 1 33 19 32 0.2 11 118 -42 -21 48 36 -20 14 47 -21 52 53 -20 10 34 0.40 107 0 0 -21 38 2 19 32 0.9 12 118 -41 -22 25 8 -20 51 14 -22 29 25 -20 47 1 0.40 108 0 0 -22 14 29 19 32 1.7 13 118 -40 -23 1 38 -21 27 39 -23 5 55 -21 23 25 0.40 109 0 0 -22 50 52 19 32 2.6 15 117 -39 -23 38 3 -22 4 0 -23 42 20 -21 59 47 0.40 110 0 0 -23 27 11 19 32 3.5 16 117 -38 -24 14 23 -22 40 17 -24 18 40 -22 36 3 0.40 111 0 0 -24 3 23 19 32 4.5 17 116 -37 -24 50 36 -23 16 28 -24 54 53 -23 12 14 0.40 112 0 0 -24 39 28 19 32 5.5 18 116 -36 -25 26 42 -23 52 32 -25 30 59 -23 48 19 0.40 113 0 0 -25 15 24 19 32 6.6 19 115 -35 -26 2 38 -24 28 28 -26 6 56 -24 24 14 0.40 114 0 0 -25 51 11 19 32 7.7 20 115 -34 -26 38 25 -25 4 15 -26 42 42 -25 0 1 0.40 115 0 0 -26 26 47 19 32 8.9 21 114 -32 -27 14 0 -25 39 51 -27 18 18 -25 35 37 0.40 116 0 0 -27 2 11 19 32 10.2 22 114 -31 -27 49 23 -26 15 16 -27 53 41 -26 11 2 0.40 117 0 0 -27 37 21 19 32 11.5 23 113 -30 -28 24 33 -26 50 28 -28 28 50 -26 46 14 0.40 118 0 0 -28 12 18 19 32 12.9 24 113 -29 -28 59 28 -27 25 26 -29 3 45 -27 21 13 0.40 119 0 0 -28 47 0 19 32 14.3 25 112 -28 -29 34 8 -28 0 10 -29 38 25 -27 55 57 0.40 120 0 0 -29 21 25 19 32 15.7 26 112 -27 -30 8 31 -28 34 38 -30 12 48 -28 30 25 0.40 121 0 0 -29 55 34 19 32 17.2 27 111 -26 -30 42 37 -29 8 49 -30 46 53 -29 4 36 0.40 122 0 0 -30 29 24 19 32 18.8 28 110 -25 -31 16 24 -29 42 42 -31 20 40 -29 38 29 0.40 123 0 0 -31 2 55 19 32 20.3 29 110 -24 -31 49 52 -30 16 17 -31 54 7 -30 12 4 0.40 124 0 0 -31 36 7 19 32 22.0 30 109 -23 -32 22 59 -30 49 32 -32 27 15 -30 45 20 0.40 125 0 0 -32 8 58 19 32 23.6 31 108 -22 -32 55 46 -31 22 27 -33 0 1 -31 18 15 0.40 126 0 0 -32 41 27 19 32 25.3 32 108 -21 -33 28 11 -31 55 1 -33 32 26 -31 50 50 0.40 127 0 0 -33 13 34 19 32 27.0 33 107 -20 -34 0 14 -32 27 13 -34 4 28 -32 23 2 0.40 128 0 0 -33 45 19 19 32 28.8 34 106 -19 -34 31 53 -32 59 2 -34 36 7 -32 54 52 0.40 129 0 0 -34 16 40 19 32 30.6 35 105 -18 -35 3 8 -33 30 29 -35 7 22 -33 26 19 0.40 130 0 0 -34 47 37 19 32 32.4 36 105 -17 -35 34 0 -34 1 31 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57 295 47 -51 11 52 -49 51 19 -51 15 32 -49 47 41 0.40 -131 0 0 -50 21 59 19 35 40.4 57 294 48 -51 2 27 -49 41 43 -51 6 7 -49 38 4 0.40 -130 0 0 -50 12 4 19 35 42.2 56 293 48 -50 52 38 -49 31 42 -50 56 19 -49 28 3 0.40 -129 0 0 -50 1 45 19 35 43.9 56 291 49 -50 42 25 -49 21 17 -50 46 6 -49 17 38 0.40 -128 0 0 -49 51 2 19 35 45.7 55 290 49 -50 31 48 -49 10 28 -50 35 30 -49 6 49 0.40 -127 0 0 -49 39 54 19 35 47.5 55 288 50 -50 20 46 -48 59 14 -50 24 29 -48 55 34 0.40 -126 0 0 -49 28 22 19 35 49.2 54 287 50 -50 9 20 -48 47 36 -50 13 4 -48 43 55 0.40 -125 0 0 -49 16 25 19 35 51.0 54 286 50 -49 57 30 -48 35 32 -50 1 14 -48 31 50 0.40 -124 0 0 -49 4 2 19 35 52.8 53 285 51 -49 45 14 -48 23 3 -49 48 59 -48 19 21 0.40 -123 0 0 -48 51 15 19 35 54.5 53 283 51 -49 32 34 -48 10 8 -49 36 19 -48 6 26 0.40 -122 0 0 -48 38 2 19 35 56.3 52 282 52 -49 19 27 -47 56 48 -49 23 13 -47 53 5 0.40 -121 0 0 -48 24 23 19 35 58.0 51 281 52 -49 5 56 -47 43 2 -49 9 42 -47 39 18 0.40 -120 0 0 -48 10 18 19 35 59.8 51 280 53 -48 51 58 -47 28 50 -48 55 45 -47 25 6 0.40 -119 0 0 -47 55 47 19 36 1.6 50 279 53 -48 37 35 -47 14 12 -48 41 23 -47 10 27 0.40 -118 0 0 -47 40 50 19 36 3.3 49 277 53 -48 22 46 -46 59 7 -48 26 34 -46 55 21 0.40 -117 0 0 -47 25 26 19 36 5.1 49 276 54 -48 7 30 -46 43 36 -48 11 19 -46 39 49 0.40 -116 0 0 -47 9 36 19 36 6.8 48 275 54 -47 51 47 -46 27 38 -47 55 37 -46 23 50 0.40 -115 0 0 -46 53 19 19 36 8.5 47 274 54 -47 35 38 -46 11 12 -47 39 28 -46 7 24 0.40 -114 0 0 -46 36 34 19 36 10.3 47 273 55 -47 19 1 -45 54 20 -47 22 53 -45 50 31 0.41 -113 0 0 -46 19 22 19 36 12.0 46 272 55 -47 1 58 -45 37 0 -47 5 50 -45 33 11 0.41 -112 0 0 -46 1 43 19 36 13.7 45 271 56 -46 44 27 -45 19 13 -46 48 20 -45 15 23 0.41 -111 0 0 -45 43 36 19 36 15.5 45 270 56 -46 26 28 -45 0 58 -46 30 22 -44 57 7 0.41 -110 0 0 -45 25 2 19 36 17.2 44 269 56 -46 8 2 -44 42 15 -46 11 56 -44 38 23 0.41 -109 0 0 -45 5 59 19 36 18.9 43 268 56 -45 49 8 -44 23 4 -45 53 3 -44 19 12 0.41 -108 0 0 -44 46 28 19 36 20.6 43 267 57 -45 29 46 -44 3 25 -45 33 42 -43 59 32 0.41 -107 0 0 -44 26 30 19 36 22.3 42 266 57 -45 9 56 -43 43 18 -45 13 52 -43 39 24 0.41 -106 0 0 -44 6 2 19 36 24.0 41 265 57 -44 49 37 -43 22 42 -44 53 34 -43 18 47 0.41 -105 0 0 -43 45 7 19 36 25.6 40 264 57 -44 28 50 -43 1 38 -44 32 48 -42 57 42 0.41 -104 0 0 -43 23 43 19 36 27.3 40 263 58 -44 7 34 -42 40 5 -44 11 33 -42 36 9 0.41 -103 0 0 -43 1 50 19 36 28.9 39 262 58 -43 45 50 -42 18 4 -43 49 50 -42 14 7 0.41 -102 0 0 -42 39 28 19 36 30.6 38 261 58 -43 23 37 -41 55 34 -43 27 38 -41 51 37 0.41 -101 0 0 -42 16 38 19 36 32.2 37 260 58 -43 0 56 -41 32 36 -43 4 57 -41 28 38 0.41 -100 0 0 -41 53 20 19 36 33.8 36 260 58 -42 37 45 -41 9 9 -42 41 48 -41 5 10 0.41 - 99 0 0 -41 29 32 19 36 35.4 36 259 58 -42 14 6 -40 45 13 -42 18 9 -40 41 13 0.41 - 98 0 0 -41 5 16 19 36 37.0 35 258 58 -41 49 59 -40 20 49 -41 54 2 -40 16 48 0.41 - 97 0 0 -40 40 32 19 36 38.5 34 257 58 -41 25 22 -39 55 56 -41 29 27 -39 51 55 0.41 - 96 0 0 -40 15 19 19 36 40.1 33 256 59 -41 0 18 -39 30 35 -41 4 23 -39 26 33 0.41 - 95 0 0 -39 49 37 19 36 41.6 32 256 58 -40 34 44 -39 4 46 -40 38 50 -39 0 43 0.41 - 94 0 0 -39 23 28 19 36 43.1 31 255 58 -40 8 43 -38 38 29 -40 12 49 -38 34 25 0.41 - 93 0 0 -38 56 50 19 36 44.6 31 254 58 -39 42 13 -38 11 44 -39 46 20 -38 7 40 0.41 - 92 0 0 -38 29 45 19 36 46.0 30 253 58 -39 15 15 -37 44 31 -39 19 23 -37 40 26 0.41 - 91 0 0 -38 2 12 19 36 47.4 29 253 58 -38 47 49 -37 16 51 -38 51 58 -37 12 45 0.41 - 90 0 0 -37 34 12 19 36 48.8 28 252 58 -38 19 56 -36 48 43 -38 24 6 -36 44 37 0.41 - 89 0 0 -37 5 44 19 36 50.2 27 251 58 -37 51 36 -36 20 9 -37 55 46 -36 16 3 0.41 - 88 0 0 -36 36 51 19 36 51.5 26 250 58 -37 22 49 -35 51 9 -37 27 0 -35 47 2 0.42 - 87 0 0 -36 7 31 19 36 52.8 25 250 57 -36 53 36 -35 21 42 -36 57 47 -35 17 34 0.42 - 86 0 0 -35 37 45 19 36 54.1 24 249 57 -36 23 56 -34 51 50 -36 28 8 -34 47 42 0.42 - 85 0 0 -35 7 34 19 36 55.3 23 248 57 -35 53 51 -34 21 33 -35 58 4 -34 17 24 0.42 - 84 0 0 -34 36 58 19 36 56.5 22 248 56 -35 23 21 -33 50 52 -35 27 34 -33 46 42 0.42 - 83 0 0 -34 5 57 19 36 57.7 21 247 56 -34 52 26 -33 19 46 -34 56 40 -33 15 36 0.42 - 82 0 0 -33 34 33 19 36 58.8 20 247 56 -34 21 8 -32 48 17 -34 25 21 -32 44 6 0.42 - 81 0 0 -33 2 46 19 36 59.9 19 246 55 -33 49 26 -32 16 25 -33 53 40 -32 12 14 0.42 - 80 0 0 -32 30 37 19 37 0.9 18 245 55 -33 17 21 -31 44 11 -33 21 35 -31 40 0 0.42 - 79 0 0 -31 58 6 19 37 1.9 17 245 54 -32 44 54 -31 11 36 -32 49 9 -31 7 24 0.43 - 78 0 0 -31 25 14 19 37 2.8 16 244 54 -32 12 6 -30 38 40 -32 16 21 -30 34 28 0.43 - 77 0 0 -30 52 2 19 37 3.7 15 244 53 -31 38 57 -30 5 24 -31 43 13 -30 1 12 0.43 - 76 0 0 -30 18 30 19 37 4.6 14 243 53 -31 5 29 -29 31 49 -31 9 45 -29 27 37 0.43 - 75 0 0 -29 44 40 19 37 5.3 13 243 52 -30 31 42 -28 57 56 -30 35 58 -28 53 43 0.43 - 74 0 0 -29 10 33 19 37 6.1 12 242 51 -29 57 37 -28 23 46 -30 1 53 -28 19 33 0.44 - 73 0 0 -28 36 8 19 37 6.8 11 242 51 -29 23 15 -27 49 20 -29 27 32 -27 45 7 0.44 - 72 0 0 -28 1 29 19 37 7.4 10 241 50 -28 48 37 -27 14 39 -28 52 54 -27 10 25 0.44 - 71 0 0 -27 26 34 19 37 8.0 9 241 49 -28 13 44 -26 39 43 -28 18 1 -26 35 29 0.45 - 70 0 0 -26 51 26 19 37 8.5 8 240 49 -27 38 36 -26 4 33 -27 42 54 -26 0 20 0.45 - 69 0 0 -26 16 5 19 37 8.9 7 240 48 -27 3 16 -25 29 12 -27 7 34 -25 24 58 0.46 - 68 0 0 -25 40 33 19 37 9.3 6 239 47 -26 27 44 -24 53 40 -26 32 2 -24 49 26 0.47 - 67 0 0 -25 4 50 19 37 9.6 5 239 46 -25 52 2 -24 17 57 -25 56 19 -24 13 43 0.49 - 66 0 0 -24 28 59 19 37 9.9 4 238 46 -25 16 10 -23 42 6 -25 20 27 -23 37 52 0.51 - 65 0 0 -23 52 59 19 37 10.1 3 238 45 -24 40 9 -23 6 7 -24 44 26 -23 1 54 0.56 - 64 0 0 -23 16 53 19 37 10.2 2 238 44 -24 4 1 -22 30 2 -24 8 18 -22 25 49 0.67 - 63 0 0 -22 40 40 19 37 10.3 0 237 43 -23 27 47 -21 53 51 -23 32 4 -21 49 38 1.28 Uncertainty in time = +/- 1 secs Prediction of 2022 Dec 30.1 Data for the target star ------------------------ * name: TYC 7393-00380-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 24 06.3029 DE: -30 16 48.355 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 24 06.3030 DE: -30 16 48.355 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 9.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (187) Lamberta asteroid class: ShapeModel approx. diameter [km]: 135 approx. diameter ["]: 0.072 distance from Earth [AU]: 2.56330 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#112 date of fit: 2022 Nov 25 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): 0.015", 0.003", 89.611° remarks: * orbital elements for (187)Lamberta : Mean anomaly = 21.4015817489 deg Arg. of pericenter = 196.7070911547 deg Long. of node = 21.6732279277 deg Inclination = 10.5824020168 deg Eccentricity = 0.2405504331 Semimajor axis = 2.7282956840 AU Perihelion dist = 2.0720029756 AU Mag: H = 8.30, G = 0.15 Epoch of elements : MJD 59993.81569444 TDT (2023 Feb 18.8157) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1122022Nov25,3.56,2023,2,18,19.575993,-0.027698,-0.368054,21.262709,-1.625557,-0.004521,-0.000595,-0.000001,0.000000 -165.7533,-30.2679,-110.17,-11.51,False TYC 7393-00380-1,18.40175074,-30.2800988,0.00,9.52,0.00,0.0,0,,18.42604924,-30.2679374,3.59,0.00,0,0,0 187,Lamberta,13.07,134.6,2.5633,0,0,5.632,-5.57,,6.8,0 0,21.2232,2023,2,18,196.7071,21.6732,10.5824,0.24055,2.72830,2.07200,8.30,5.0,0.15 1.045,0.0147,0.0031,90,0.0033,Known errors,-1.00,-1,-1,-1 20230218_0380-1,59943.05 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 30, 01:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org