IOTA/IOTA-ES occultation update for (187) Lamberta / TYC 7462-00798-1 event on 2023 May 28, 02:54 UT Visible from Africa Summary ------- On 2023 May 28 UT, the 134.6 km diameter asteroid (187) Lamberta will occult a 10.9 mag star in the constellation Microscopium for observers along a path across Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.75 mag to 12.36 mag (the magnitude of the asteroid) for at most 23.300 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: 99 * date and approx. time of event: 2023 May 28, 02:37 - 2023 May 28, 03:11 * geocentric midpoint of event [JD]: 2460092.62105396 * magnitude of target star: 10.85 * magnitude drop [mag]: 1.75 * estimated maximum duration [s]: 23.300 * Moon: 54 % sunlit, 145° distance * Sun: 118° distance * rough path description: Africa The occultation path -------------------- * approximate projected width [km]: 150 * 1 sigma uncertainty interval [path widths]: +/- 0.15 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.010) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.006", 60°) * approx speed of asteroid's shadow [km/s]: 5.7775 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7462-00798-1 by 187 Lamberta on 2023 May 28 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 - 11 0 0 .. .. .... .. .. .. .. .. .. 49 43 16 .. .. .. 49 21 19 .. .. .. .... - 10 0 0 49 56 21 2 37 52.1 1 148 -14 48 42 55 .. .. .. 48 20 50 .. .. .. .... - 9 0 0 48 54 37 2 37 52.6 2 148 -15 47 40 46 50 9 52 47 18 34 50 33 4 -0.19 - 8 0 0 47 51 5 2 37 53.7 3 149 -15 46 36 52 49 6 43 46 14 32 49 30 2 -0.29 - 7 0 0 46 45 45 2 37 55.4 4 150 -16 45 31 11 48 1 44 45 8 46 48 25 9 -0.34 - 6 0 0 45 38 39 2 37 57.8 6 151 -16 44 23 47 46 54 56 44 1 16 47 18 27 -0.36 - 5 0 0 44 29 48 2 38 1.0 7 151 -17 43 14 41 45 46 20 42 52 5 46 9 55 -0.37 - 4 0 0 43 19 14 2 38 4.9 8 152 -17 42 3 56 44 35 59 41 41 17 44 59 38 -0.38 - 3 0 0 42 7 2 2 38 9.6 10 153 -18 40 51 34 43 23 56 40 28 52 43 47 38 -0.39 - 2 0 0 40 53 15 2 38 15.3 11 154 -18 39 37 41 42 10 14 39 14 57 42 33 58 -0.40 - 1 0 0 39 37 56 2 38 21.8 13 154 -19 38 22 19 40 54 58 37 59 34 41 18 43 -0.40 0 0 0 38 21 11 2 38 29.3 14 155 -19 37 5 34 39 38 12 36 42 49 40 1 57 -0.40 1 0 0 37 3 5 2 38 37.7 16 156 -20 35 47 31 38 20 3 35 24 47 38 43 46 -0.41 2 0 0 35 43 44 2 38 47.2 17 156 -20 34 28 17 37 0 35 34 5 35 37 24 16 -0.41 3 0 0 34 23 16 2 38 57.7 19 157 -21 33 7 58 35 39 56 32 45 18 36 3 33 -0.41 4 0 0 33 1 46 2 39 9.3 20 158 -21 31 46 41 34 18 12 31 24 5 34 41 44 -0.41 5 0 0 31 39 22 2 39 22.0 22 158 -21 30 24 33 32 55 31 30 2 2 33 18 58 -0.41 6 0 0 30 16 13 2 39 35.7 24 159 -22 29 1 43 31 32 2 28 39 18 31 55 23 -0.42 7 0 0 28 52 27 2 39 50.5 25 160 -22 27 38 19 30 7 52 27 16 0 30 31 6 -0.42 8 0 0 27 28 12 2 40 6.4 27 160 -22 26 14 29 28 43 11 25 52 17 29 6 16 -0.42 9 0 0 26 3 38 2 40 23.4 29 161 -22 24 50 22 27 18 7 24 28 19 27 41 3 -0.42 10 0 0 24 38 53 2 40 41.4 30 162 -23 23 26 8 25 52 50 23 4 13 26 15 35 -0.42 11 0 0 23 14 6 2 41 0.4 32 163 -23 22 1 55 24 27 29 21 40 10 24 50 3 -0.42 12 0 0 21 49 27 2 41 20.3 34 163 -23 20 37 51 23 2 13 20 16 17 23 24 35 -0.43 13 0 0 20 25 5 2 41 41.2 35 164 -23 19 14 7 21 37 11 18 52 43 21 59 21 -0.43 14 0 0 19 1 8 2 42 3.0 37 165 -23 17 50 49 20 12 32 17 29 38 20 34 30 -0.43 15 0 0 17 37 44 2 42 25.6 38 166 -23 16 28 7 18 48 25 16 7 8 19 10 9 -0.43 16 0 0 16 15 3 2 42 49.0 40 167 -22 15 6 9 17 24 59 14 45 23 17 46 29 -0.43 17 0 0 14 53 11 2 43 13.1 42 168 -22 13 45 2 16 2 20 13 24 29 16 23 36 -0.44 18 0 0 13 32 16 2 43 37.9 43 169 -22 12 24 53 14 40 38 12 4 33 15 1 38 -0.44 19 0 0 12 12 24 2 44 3.3 45 170 -22 11 5 48 13 19 58 10 45 43 13 40 43 -0.44 20 0 0 10 53 43 2 44 29.1 46 171 -21 9 47 55 12 0 27 9 28 4 12 20 57 -0.44 21 0 0 9 36 18 2 44 55.5 47 172 -21 8 31 18 10 42 12 8 11 41 11 2 26 -0.45 22 0 0 8 20 13 2 45 22.2 49 173 -21 7 16 2 9 25 17 6 56 40 9 45 15 -0.45 23 0 0 7 5 34 2 45 49.3 50 174 -20 6 2 11 8 9 47 5 43 4 8 29 30 -0.45 24 0 0 5 52 24 2 46 16.6 51 176 -20 4 49 51 6 55 47 4 30 58 7 15 14 -0.45 25 0 0 4 40 47 2 46 44.2 53 177 -19 3 39 3 5 43 20 3 20 25 6 2 31 -0.46 26 0 0 3 30 47 2 47 11.9 54 179 -19 2 29 51 4 32 29 2 11 27 4 51 25 -0.46 27 0 0 2 22 24 2 47 39.7 55 180 -18 1 22 16 3 23 16 1 4 7 3 41 57 -0.46 28 0 0 1 15 41 2 48 7.5 56 182 -17 0 16 21 2 15 45 - 0 1 34 2 34 10 -0.46 29 0 0 0 10 40 2 48 35.4 57 184 -17 - 0 47 53 1 9 55 - 1 5 34 1 28 6 -0.47 30 0 0 - 0 52 38 2 49 3.2 58 186 -16 - 1 50 25 0 5 49 - 2 7 52 0 23 45 -0.47 31 0 0 - 1 54 13 2 49 30.9 59 188 -16 - 2 51 14 - 0 56 32 - 3 8 28 - 0 38 51 -0.47 32 0 0 - 2 54 4 2 49 58.5 60 190 -15 - 3 50 21 - 1 57 10 - 4 7 21 - 1 39 43 -0.47 33 0 0 - 3 52 12 2 50 26.0 61 192 -14 - 4 47 45 - 2 56 2 - 5 4 33 - 2 38 49 -0.48 34 0 0 - 4 48 37 2 50 53.2 61 194 -13 - 5 43 27 - 3 53 10 - 6 0 2 - 3 36 11 -0.48 35 0 0 - 5 43 18 2 51 20.3 62 196 -13 - 6 37 28 - 4 48 35 - 6 53 50 - 4 31 49 -0.48 36 0 0 - 6 36 18 2 51 47.1 62 199 -12 - 7 29 47 - 5 42 16 - 7 45 58 - 5 25 43 -0.48 37 0 0 - 7 27 37 2 52 13.7 63 201 -11 - 8 20 27 - 6 34 16 - 8 36 26 - 6 17 55 -0.49 38 0 0 - 8 17 16 2 52 39.9 63 204 -11 - 9 9 28 - 7 24 34 - 9 25 15 - 7 8 25 -0.49 39 0 0 - 9 5 17 2 53 5.9 63 206 -10 - 9 56 52 - 8 13 12 -10 12 28 - 7 57 15 -0.49 40 0 0 - 9 51 40 2 53 31.6 64 209 -9 -10 42 39 - 9 0 12 -10 58 5 - 8 44 26 -0.49 41 0 0 -10 36 28 2 53 57.0 64 211 -8 -11 26 52 - 9 45 35 -11 42 7 - 9 30 0 -0.49 42 0 0 -11 19 41 2 54 22.0 64 213 -7 -12 9 32 -10 29 23 -12 24 37 -10 13 58 -0.49 43 0 0 -12 1 22 2 54 46.7 64 216 -7 -12 50 40 -11 11 36 -13 5 36 -10 56 22 -0.50 44 0 0 -12 41 31 2 55 11.1 64 218 -6 -13 30 19 -11 52 18 -13 45 5 -11 37 14 -0.50 45 0 0 -13 20 11 2 55 35.1 63 220 -5 -14 8 29 -12 31 28 -14 23 6 -12 16 34 -0.50 46 0 0 -13 57 24 2 55 58.7 63 222 -4 -14 45 12 -13 9 10 -14 59 41 -12 54 25 -0.50 47 0 0 -14 33 10 2 56 22.1 63 224 -4 -15 20 31 -13 45 25 -15 34 51 -13 30 48 -0.50 48 0 0 -15 7 31 2 56 45.0 62 226 -3 -15 54 26 -14 20 14 -16 8 38 -14 5 46 -0.50 49 0 0 -15 40 30 2 57 7.6 62 228 -2 -16 26 59 -14 53 39 -16 41 4 -14 39 19 -0.50 50 0 0 -16 12 8 2 57 29.9 62 230 -1 -16 58 12 -15 25 41 -17 12 9 -15 11 29 -0.50 51 0 0 -16 42 26 2 57 51.8 61 232 0 -17 28 6 -15 56 23 -17 41 56 -15 42 18 -0.51 52 0 0 -17 11 25 2 58 13.3 61 233 0 -17 56 44 -16 25 46 -18 10 27 -16 11 48 -0.51 53 0 0 -17 39 8 2 58 34.5 60 235 1 -18 24 5 -16 53 51 -18 37 42 -16 39 59 -0.51 54 0 0 -18 5 36 2 58 55.4 59 236 2 -18 50 12 -17 20 39 -19 3 43 -17 6 55 -0.51 55 0 0 -18 30 50 2 59 15.9 59 237 3 -19 15 7 -17 46 13 -19 28 32 -17 32 35 -0.51 56 0 0 -18 54 51 2 59 36.1 58 238 3 -19 38 50 -18 10 34 -19 52 9 -17 57 1 -0.51 57 0 0 -19 17 42 2 59 55.9 57 239 4 -20 1 22 -18 33 42 -20 14 36 -18 20 15 -0.51 58 0 0 -19 39 22 3 0 15.5 57 240 5 -20 22 46 -18 55 40 -20 35 55 -18 42 18 -0.51 59 0 0 -19 59 54 3 0 34.6 56 241 6 -20 43 2 -19 16 28 -20 56 6 -19 3 11 -0.51 60 0 0 -20 19 18 3 0 53.5 55 242 7 -21 2 11 -19 36 8 -21 15 11 -19 22 56 -0.51 61 0 0 -20 37 36 3 1 12.0 55 242 7 -21 20 15 -19 54 40 -21 33 10 -19 41 32 -0.51 62 0 0 -20 54 49 3 1 30.3 54 243 8 -21 37 14 -20 12 6 -21 50 6 -19 59 3 -0.51 63 0 0 -21 10 57 3 1 48.2 53 243 9 -21 53 10 -20 28 28 -22 5 58 -20 15 28 -0.51 64 0 0 -21 26 2 3 2 5.8 52 244 10 -22 8 3 -20 43 45 -22 20 47 -20 30 49 -0.51 65 0 0 -21 40 5 3 2 23.1 51 244 10 -22 21 55 -20 57 58 -22 34 36 -20 45 6 -0.51 66 0 0 -21 53 6 3 2 40.1 51 245 11 -22 34 46 -21 11 10 -22 47 23 -20 58 21 -0.51 67 0 0 -22 5 6 3 2 56.9 50 245 12 -22 46 36 -21 23 20 -22 59 11 -21 10 34 -0.51 68 0 0 -22 16 6 3 3 13.3 49 245 13 -22 57 28 -21 34 29 -23 10 0 -21 21 46 -0.51 69 0 0 -22 26 7 3 3 29.4 48 246 13 -23 7 21 -21 44 38 -23 19 50 -21 31 57 -0.51 70 0 0 -22 35 9 3 3 45.3 47 246 14 -23 16 15 -21 53 47 -23 28 43 -21 41 9 -0.51 71 0 0 -22 43 13 3 4 0.9 46 246 15 -23 24 13 -22 1 58 -23 36 38 -21 49 22 -0.51 72 0 0 -22 50 19 3 4 16.2 46 246 16 -23 31 13 -22 9 10 -23 43 37 -21 56 36 -0.51 73 0 0 -22 56 29 3 4 31.2 45 246 17 -23 37 17 -22 15 25 -23 49 40 -22 2 52 -0.51 74 0 0 -23 1 42 3 4 45.9 44 246 17 -23 42 26 -22 20 43 -23 54 47 -22 8 11 -0.50 75 0 0 -23 5 58 3 5 0.4 43 246 18 -23 46 38 -22 25 3 -23 58 58 -22 12 33 -0.50 76 0 0 -23 9 19 3 5 14.6 42 246 19 -23 49 56 -22 28 27 -24 2 15 -22 15 58 -0.50 77 0 0 -23 11 44 3 5 28.6 41 246 20 -23 52 19 -22 30 55 -24 4 37 -22 18 27 -0.50 78 0 0 -23 13 15 3 5 42.2 40 246 20 -23 53 47 -22 32 28 -24 6 5 -22 20 0 -0.50 79 0 0 -23 13 50 3 5 55.7 40 246 21 -23 54 21 -22 33 4 -24 6 38 -22 20 37 -0.50 80 0 0 -23 13 30 3 6 8.8 39 246 22 -23 54 1 -22 32 45 -24 6 18 -22 20 18 -0.50 81 0 0 -23 12 16 3 6 21.7 38 246 23 -23 52 47 -22 31 31 -24 5 4 -22 19 4 -0.50 82 0 0 -23 10 8 3 6 34.3 37 246 24 -23 50 39 -22 29 22 -24 2 56 -22 16 55 -0.50 83 0 0 -23 7 5 3 6 46.7 36 246 24 -23 47 37 -22 26 18 -23 59 54 -22 13 51 -0.50 84 0 0 -23 3 7 3 6 58.8 35 245 25 -23 43 41 -22 22 19 -23 55 59 -22 9 51 -0.50 85 0 0 -22 58 15 3 7 10.6 34 245 26 -23 38 52 -22 17 25 -23 51 11 -22 4 56 -0.49 86 0 0 -22 52 29 3 7 22.2 33 245 27 -23 33 9 -22 11 35 -23 45 28 -21 59 6 -0.49 87 0 0 -22 45 49 3 7 33.5 32 245 28 -23 26 32 -22 4 51 -23 38 52 -21 52 20 -0.49 88 0 0 -22 38 13 3 7 44.6 31 245 28 -23 19 1 -21 57 12 -23 31 23 -21 44 40 -0.49 89 0 0 -22 29 43 3 7 55.4 30 244 29 -23 10 35 -21 48 37 -23 22 59 -21 36 3 -0.49 90 0 0 -22 20 18 3 8 5.9 29 244 30 -23 1 16 -21 39 6 -23 13 41 -21 26 31 -0.49 91 0 0 -22 9 58 3 8 16.1 29 244 31 -22 51 2 -21 28 40 -23 3 29 -21 16 3 -0.49 92 0 0 -21 58 43 3 8 26.1 28 244 32 -22 39 53 -21 17 18 -22 52 22 -21 4 39 -0.49 93 0 0 -21 46 31 3 8 35.8 27 243 32 -22 27 49 -21 4 59 -22 40 20 -20 52 18 -0.49 94 0 0 -21 33 24 3 8 45.2 26 243 33 -22 14 49 -20 51 44 -22 27 23 -20 39 0 -0.48 95 0 0 -21 19 21 3 8 54.3 25 243 34 -22 0 54 -20 37 32 -22 13 30 -20 24 45 -0.48 96 0 0 -21 4 20 3 9 3.1 24 243 35 -21 46 3 -20 22 23 -21 58 42 -20 9 33 -0.48 97 0 0 -20 48 23 3 9 11.6 23 242 36 -21 30 15 -20 6 15 -21 42 57 -19 53 23 -0.48 98 0 0 -20 31 28 3 9 19.9 22 242 37 -21 13 30 -19 49 10 -21 26 15 -19 36 15 -0.48 99 0 0 -20 13 35 3 9 27.8 21 242 37 -20 55 48 -19 31 6 -21 8 36 -19 18 7 -0.48 100 0 0 -19 54 43 3 9 35.4 20 241 38 -20 37 8 -19 12 3 -20 49 59 -18 59 1 -0.48 101 0 0 -19 34 53 3 9 42.7 19 241 39 -20 17 30 -18 52 1 -20 30 25 -18 38 55 -0.48 102 0 0 -19 14 3 3 9 49.6 18 241 40 -19 56 52 -18 30 58 -20 9 51 -18 17 48 -0.48 103 0 0 -18 52 13 3 9 56.2 17 241 41 -19 35 16 -18 8 55 -19 48 18 -17 55 41 -0.47 104 0 0 -18 29 23 3 10 2.5 16 240 42 -19 12 39 -17 45 51 -19 25 46 -17 32 32 -0.47 105 0 0 -18 5 31 3 10 8.5 15 240 43 -18 49 2 -17 21 44 -19 2 13 -17 8 22 -0.47 106 0 0 -17 40 38 3 10 14.0 14 240 44 -18 24 24 -16 56 36 -18 37 39 -16 43 9 -0.47 107 0 0 -17 14 43 3 10 19.2 13 239 44 -17 58 44 -16 30 25 -18 12 4 -16 16 52 -0.47 108 0 0 -16 47 44 3 10 24.0 11 239 45 -17 32 1 -16 3 10 -17 45 27 -15 49 33 -0.47 109 0 0 -16 19 43 3 10 28.5 10 239 46 -17 4 16 -15 34 51 -17 17 47 -15 21 9 -0.47 110 0 0 -15 50 37 3 10 32.5 9 239 47 -16 35 28 -15 5 28 -16 49 3 -14 51 40 -0.47 111 0 0 -15 20 26 3 10 36.1 8 238 48 -16 5 35 -14 34 59 -16 19 16 -14 21 5 -0.47 112 0 0 -14 49 11 3 10 39.3 7 238 49 -15 34 38 -14 3 25 -15 48 25 -13 49 25 -0.47 113 0 0 -14 16 49 3 10 42.1 6 238 50 -15 2 36 -13 30 44 -15 16 28 -13 16 38 -0.47 114 0 0 -13 43 21 3 10 44.4 5 238 51 -14 29 28 -12 56 56 -14 43 26 -12 42 44 -0.48 115 0 0 -13 8 47 3 10 46.2 4 237 52 -13 55 13 -12 22 1 -14 9 17 -12 7 43 -0.48 116 0 0 -12 33 5 3 10 47.6 3 237 53 -13 19 52 -11 45 57 -13 34 2 -11 31 33 -0.49 117 0 0 -11 56 15 3 10 48.5 1 237 54 -12 43 23 -11 8 45 -12 57 40 -10 54 14 -0.52 118 0 0 -11 18 16 3 10 48.9 0 237 55 -12 5 47 .. .. .. -12 20 11 .. .. .. -0.85 Uncertainty in time = +/- 4 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 7462-00798-1 * constellation : Microscopium * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 55 12.2309 DE: -32 38 05.143 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 55 12.2310 DE: -32 38 05.143 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.9 * 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 ["]: 0.110 distance from Earth [AU]: 1.68800 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#113 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): 0.018", 0.006", 59.5° remarks: * orbital elements for (187)Lamberta : Mean anomaly = 42.9138487686 deg Arg. of pericenter = 196.6973640478 deg Long. of node = 21.6725622009 deg Inclination = 10.5823466864 deg Eccentricity = 0.2405005266 Semimajor axis = 2.7280756408 AU Perihelion dist = 2.0719720127 AU Mag: H = 8.30, G = 0.15 Epoch of elements : MJD 60092.12118056 TDT (2023 May 28.1212) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1132023Apr24,23.30,2023,5,28,2.905295,0.281847,0.342152,2.516857,-2.073483,-0.004687,-0.000702,0.000001,0.000000 25.1836,-32.5446,135.73,21.40,False TYC 7462-00798-1,20.92006411,-32.6347619,0.00,10.85,0.00,0.0,0,,20.94408601,-32.5445599,1.75,0.00,0,0,0 187,Lamberta,12.36,134.6,1.6880,0,0,1.037,-10.80,,6.8,0 0,42.8873,2023,5,28,196.6974,21.6726,10.5823,0.24050,2.72808,2.07197,8.30,5.0,0.15 1.152,0.0177,0.0060,60,0.0167,Known errors,-1.00,-1,-1,-1 20230528_0798-1,60063.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:30 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org