IOTA/IOTA-ES occultation update for (4902) Thessandrus / UCAC4-509-007821 event on 2022 Oct 24, 01:55 UT Visible from Africa Summary ------- On 2022 Oct 24 UT, the 54.5 km diameter asteroid (4902) Thessandrus will occult a 12.5 mag star in the constellation Taurus 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 4.60 mag to 17.08 mag (the magnitude of the asteroid) for at most 5.230 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: 55 * date and approx. time of event: 2022 Oct 24, 01:45 - 2022 Oct 24, 02:06 * geocentric midpoint of event [JD]: 2459876.58042091 * magnitude of target star: 12.50 * magnitude drop [mag]: 4.60 * estimated maximum duration [s]: 5.230 * Moon: 2 % sunlit, 123° distance * Sun: 139° distance * rough path description: Africa The occultation path -------------------- * approximate projected width [km]: 55 * 1 sigma uncertainty interval [path widths]: +/- 1.14 * 1 sigma uncertainty interval [seconds]: +/- 7.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.028, +/- 0.019) * 1 sigma uncertainty ellipse (major, minor, PA): (0.028", 0.019", 84°) * approx speed of asteroid's shadow [km/s]: 10.4183 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-509-007821 by 4902 Thessandrus on 2022 Oct 24 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 - 79 0 0 -18 36 28 2 5 49.8 0 77 -37 -18 21 8 -18 51 47 -17 46 1 -19 26 46 .... - 78 0 0 -18 23 21 2 5 49.6 1 77 -38 -18 8 0 -18 38 42 -17 32 50 -19 13 46 -0.16 - 77 0 0 -18 9 45 2 5 49.3 2 77 -39 -17 54 21 -18 25 7 -17 19 7 -19 0 15 -0.16 - 76 0 0 -17 55 37 2 5 48.8 3 76 -40 -17 40 12 -18 11 2 -17 4 54 -18 46 13 -0.16 - 75 0 0 -17 40 59 2 5 48.1 4 76 -41 -17 25 32 -17 56 26 -16 50 9 -18 31 41 -0.16 - 74 0 0 -17 25 51 2 5 47.2 5 76 -42 -17 10 22 -17 41 19 -16 34 55 -18 16 39 -0.16 - 73 0 0 -17 10 12 2 5 46.1 6 76 -43 -16 54 41 -17 25 42 -16 19 9 -18 1 7 -0.16 - 72 0 0 -16 54 2 2 5 44.9 7 75 -44 -16 38 29 -17 9 35 -16 2 53 -17 45 4 -0.16 - 71 0 0 -16 37 23 2 5 43.5 8 75 -45 -16 21 47 -16 52 57 -15 46 7 -17 28 31 -0.16 - 70 0 0 -16 20 13 2 5 41.8 9 75 -46 -16 4 36 -16 35 49 -15 28 50 -17 11 28 -0.16 - 69 0 0 -16 2 33 2 5 40.0 10 74 -47 -15 46 53 -16 18 11 -15 11 3 -16 53 55 -0.16 - 68 0 0 -15 44 23 2 5 38.0 11 74 -48 -15 28 41 -16 0 3 -14 52 46 -16 35 52 -0.16 - 67 0 0 -15 25 43 2 5 35.8 12 74 -49 -15 9 59 -15 41 26 -14 33 59 -16 17 19 -0.16 - 66 0 0 -15 6 33 2 5 33.4 13 74 -50 -14 50 47 -15 22 19 -14 14 42 -15 58 17 -0.16 - 65 0 0 -14 46 54 2 5 30.8 14 73 -50 -14 31 6 -15 2 42 -13 54 55 -15 38 45 -0.16 - 64 0 0 -14 26 46 2 5 28.0 15 73 -51 -14 10 55 -14 42 35 -13 34 39 -15 18 44 -0.16 - 63 0 0 -14 6 8 2 5 25.0 16 73 -52 -13 50 15 -14 22 0 -13 13 54 -14 58 14 -0.16 - 62 0 0 -13 45 1 2 5 21.9 17 73 -53 -13 29 6 -14 0 55 -12 52 39 -14 37 15 -0.16 - 61 0 0 -13 23 25 2 5 18.5 18 73 -54 -13 7 27 -13 39 22 -12 30 55 -14 15 47 -0.16 - 60 0 0 -13 1 21 2 5 14.9 19 72 -55 -12 45 21 -13 17 20 -12 8 43 -13 53 50 -0.16 - 59 0 0 -12 38 48 2 5 11.1 20 72 -56 -12 22 45 -12 54 49 -11 46 2 -13 31 25 -0.16 - 58 0 0 -12 15 47 2 5 7.1 21 72 -57 -11 59 42 -12 31 51 -11 22 53 -13 8 32 -0.16 - 57 0 0 -11 52 18 2 5 2.9 22 72 -58 -11 36 11 -12 8 24 -10 59 16 -12 45 11 -0.16 - 56 0 0 -11 28 21 2 4 58.5 23 72 -59 -11 12 12 -11 44 30 -10 35 12 -12 21 22 -0.16 - 55 0 0 -11 3 57 2 4 54.0 24 71 -60 -10 47 45 -11 20 8 -10 10 40 -11 57 6 -0.16 - 54 0 0 -10 39 6 2 4 49.2 26 71 -61 -10 22 52 -10 55 20 - 9 45 41 -11 32 23 -0.16 - 53 0 0 -10 13 49 2 4 44.2 27 71 -62 - 9 57 32 -10 30 5 - 9 20 16 -11 7 14 -0.16 - 52 0 0 - 9 48 5 2 4 39.0 28 71 -63 - 9 31 46 -10 4 24 - 8 54 24 -10 41 38 -0.16 - 51 0 0 - 9 21 55 2 4 33.6 29 71 -64 - 9 5 34 - 9 38 16 - 8 28 6 -10 15 36 -0.16 - 50 0 0 - 8 55 20 2 4 28.0 30 71 -65 - 8 38 56 - 9 11 44 - 8 1 23 - 9 49 9 -0.16 - 49 0 0 - 8 28 20 2 4 22.2 31 71 -66 - 8 11 54 - 8 44 46 - 7 34 15 - 9 22 16 -0.16 - 48 0 0 - 8 0 55 2 4 16.2 32 71 -66 - 7 44 26 - 8 17 23 - 7 6 42 - 8 54 59 -0.16 - 47 0 0 - 7 33 6 2 4 9.9 33 71 -67 - 7 16 35 - 7 49 37 - 6 38 46 - 8 27 18 -0.16 - 46 0 0 - 7 4 54 2 4 3.5 34 71 -68 - 6 48 20 - 7 21 26 - 6 10 25 - 7 59 13 -0.16 - 45 0 0 - 6 36 18 2 3 56.9 35 71 -69 - 6 19 42 - 6 52 53 - 5 41 42 - 7 30 45 -0.16 - 44 0 0 - 6 7 20 2 3 50.1 36 71 -70 - 5 50 42 - 6 23 57 - 5 12 36 - 7 1 54 -0.16 - 43 0 0 - 5 37 59 2 3 43.2 37 71 -71 - 5 21 19 - 5 54 39 - 4 43 9 - 6 32 41 -0.16 - 42 0 0 - 5 8 18 2 3 36.0 38 71 -72 - 4 51 35 - 5 24 59 - 4 13 20 - 6 3 6 -0.16 - 41 0 0 - 4 38 15 2 3 28.6 39 71 -73 - 4 21 30 - 4 54 59 - 3 43 10 - 5 33 11 -0.16 - 40 0 0 - 4 7 52 2 3 21.0 40 71 -73 - 3 51 5 - 4 24 38 - 3 12 40 - 5 2 55 -0.16 - 39 0 0 - 3 37 10 2 3 13.3 42 71 -74 - 3 20 21 - 3 53 58 - 2 41 51 - 4 32 20 -0.16 - 38 0 0 - 3 6 9 2 3 5.3 43 71 -75 - 2 49 18 - 3 22 59 - 2 10 43 - 4 1 25 -0.16 - 37 0 0 - 2 34 49 2 2 57.2 44 71 -76 - 2 17 57 - 2 51 41 - 1 39 17 - 3 30 12 -0.16 - 36 0 0 - 2 3 13 2 2 48.9 45 71 -76 - 1 46 18 - 2 20 7 - 1 7 34 - 2 58 42 -0.16 - 35 0 0 - 1 31 19 2 2 40.5 46 71 -77 - 1 14 22 - 1 48 15 - 0 35 34 - 2 26 54 -0.16 - 34 0 0 - 0 59 10 2 2 31.8 47 71 -77 - 0 42 11 - 1 16 7 - 0 3 19 - 1 54 51 -0.16 - 33 0 0 - 0 26 45 2 2 23.0 48 72 -78 - 0 9 45 - 0 43 45 0 29 11 - 1 22 32 -0.16 - 32 0 0 0 5 54 2 2 14.1 49 72 -78 0 22 56 - 0 11 7 1 1 56 - 0 49 59 -0.16 - 31 0 0 0 38 46 2 2 4.9 50 72 -78 0 55 50 0 21 44 1 34 54 - 0 17 11 -0.16 - 30 0 0 1 11 52 2 1 55.7 51 72 -79 1 28 57 0 54 47 2 8 4 0 15 49 -0.16 - 29 0 0 1 45 9 2 1 46.2 52 73 -79 2 2 15 1 28 3 2 41 26 0 49 1 -0.16 - 28 0 0 2 18 37 2 1 36.7 53 73 -79 2 35 45 2 1 30 3 14 59 1 22 25 -0.16 - 27 0 0 2 52 15 2 1 26.9 54 74 -79 3 9 25 2 35 7 3 48 42 1 55 59 -0.16 - 26 0 0 3 26 3 2 1 17.1 56 74 -78 3 43 13 3 8 53 4 22 33 2 29 42 -0.16 - 25 0 0 3 59 59 2 1 7.1 57 74 -78 4 17 10 3 42 48 4 56 33 3 3 34 -0.16 - 24 0 0 4 34 2 2 0 57.0 58 75 -78 4 51 15 4 16 50 5 30 40 3 37 34 -0.16 - 23 0 0 5 8 12 2 0 46.8 59 76 -77 5 25 26 4 50 59 6 4 53 4 11 41 -0.16 - 22 0 0 5 42 27 2 0 36.5 60 76 -77 5 59 42 5 25 13 6 39 12 4 45 53 -0.16 - 21 0 0 6 16 47 2 0 26.0 61 77 -76 6 34 3 5 59 33 7 13 35 5 20 10 -0.16 - 20 0 0 6 51 11 2 0 15.5 62 78 -75 7 8 27 6 33 56 7 48 1 5 54 32 -0.16 - 19 0 0 7 25 38 2 0 4.8 63 78 -75 7 42 55 7 8 21 8 22 30 6 28 56 -0.16 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7 46 1 50 55.7 60 231 -27 33 23 50 32 51 42 34 0 38 32 15 3 -0.18 35 0 0 33 27 6 1 50 47.6 59 232 -26 33 43 8 33 11 5 34 19 50 32 34 31 -0.18 36 0 0 33 46 0 1 50 39.6 58 233 -25 34 1 59 33 30 1 34 38 36 32 53 33 -0.18 37 0 0 34 4 28 1 50 31.7 57 234 -24 34 20 25 33 48 32 34 56 56 33 12 8 -0.18 38 0 0 34 22 30 1 50 24.0 56 235 -23 34 38 24 34 6 36 35 14 51 33 30 17 -0.18 39 0 0 34 40 5 1 50 16.3 55 236 -23 34 55 58 34 24 13 35 32 19 33 48 0 -0.18 40 0 0 34 57 15 1 50 8.8 55 237 -22 35 13 5 34 41 25 35 49 20 34 5 17 -0.18 41 0 0 35 13 58 1 50 1.4 54 237 -21 35 29 46 34 58 11 36 5 56 34 22 8 -0.18 42 0 0 35 30 15 1 49 54.1 53 238 -20 35 46 1 35 14 30 36 22 6 34 38 33 -0.18 43 0 0 35 46 6 1 49 47.0 52 239 -19 36 1 50 35 30 24 36 37 50 34 54 31 -0.18 44 0 0 36 1 32 1 49 39.9 51 240 -19 36 17 13 35 45 51 36 53 9 35 10 3 -0.18 45 0 0 36 16 31 1 49 33.0 51 241 -18 36 32 10 36 0 53 37 8 1 35 25 10 -0.18 46 0 0 36 31 5 1 49 26.1 50 241 -17 36 46 42 36 15 28 37 22 28 35 39 50 -0.18 47 0 0 36 45 13 1 49 19.4 49 242 -16 37 0 48 36 29 38 37 36 29 35 54 5 -0.18 48 0 0 36 58 55 1 49 12.8 48 243 -16 37 14 28 36 43 22 37 50 4 36 7 53 -0.18 49 0 0 37 12 11 1 49 6.3 47 244 -15 37 27 42 36 56 41 38 3 14 36 21 16 -0.18 50 0 0 37 25 2 1 49 0.0 47 244 -14 37 40 31 37 9 33 38 15 58 36 34 13 -0.18 51 0 0 37 37 27 1 48 53.7 46 245 -13 37 52 54 37 22 1 38 28 17 36 46 45 -0.18 52 0 0 37 49 27 1 48 47.5 45 246 -12 38 4 52 37 34 2 38 40 11 36 58 51 -0.18 53 0 0 38 1 2 1 48 41.5 44 247 -12 38 16 25 37 45 39 38 51 40 37 10 31 -0.18 54 0 0 38 12 11 1 48 35.5 44 247 -11 38 27 33 37 56 50 39 2 43 37 21 46 -0.18 55 0 0 38 22 55 1 48 29.7 43 248 -10 38 38 15 38 7 36 39 13 22 37 32 36 -0.18 56 0 0 38 33 14 1 48 24.0 42 249 -10 38 48 33 38 17 56 39 23 35 37 43 0 -0.18 57 0 0 38 43 8 1 48 18.3 41 250 -9 38 58 25 38 27 52 39 33 24 37 52 59 -0.18 58 0 0 38 52 37 1 48 12.8 40 250 -8 39 7 52 38 37 22 39 42 48 38 2 33 -0.18 59 0 0 39 1 41 1 48 7.4 40 251 -7 39 16 55 38 46 28 39 51 47 38 11 42 -0.18 60 0 0 39 10 20 1 48 2.1 39 252 -7 39 25 33 38 55 9 40 0 22 38 20 26 -0.18 61 0 0 39 18 35 1 47 56.9 38 252 -6 39 33 46 39 3 24 40 8 32 38 28 45 -0.18 62 0 0 39 26 25 1 47 51.8 37 253 -5 39 41 35 39 11 16 40 16 17 38 36 40 -0.18 63 0 0 39 33 50 1 47 46.8 37 254 -4 39 48 59 39 18 42 40 23 38 38 44 9 -0.18 64 0 0 39 40 51 1 47 41.9 36 254 -4 39 55 58 39 25 44 40 30 35 38 51 14 -0.17 65 0 0 39 47 27 1 47 37.1 35 255 -3 40 2 33 39 32 21 40 37 8 38 57 53 -0.17 66 0 0 39 53 39 1 47 32.4 34 256 -2 40 8 44 39 38 34 40 43 16 39 4 9 -0.17 67 0 0 39 59 26 1 47 27.8 34 256 -2 40 14 30 39 44 23 40 49 0 39 9 59 -0.17 68 0 0 40 4 49 1 47 23.3 33 257 -1 40 19 52 39 49 47 40 54 20 39 15 26 -0.17 69 0 0 40 9 48 1 47 18.9 32 258 0 40 24 50 39 54 46 40 59 16 39 20 27 -0.17 70 0 0 40 14 22 1 47 14.6 31 259 1 40 29 24 39 59 22 41 3 48 39 25 4 -0.17 71 0 0 40 18 33 1 47 10.4 31 259 1 40 33 33 40 3 33 41 7 55 39 29 17 -0.17 72 0 0 40 22 19 1 47 6.3 30 260 2 40 37 19 40 7 19 41 11 39 39 33 5 -0.17 73 0 0 40 25 41 1 47 2.3 29 261 3 40 40 40 40 10 42 41 14 59 39 36 29 -0.17 74 0 0 40 28 38 1 46 58.4 28 261 3 40 43 37 40 13 40 41 17 55 39 39 29 -0.17 75 0 0 40 31 12 1 46 54.6 28 262 4 40 46 10 40 16 14 41 20 27 39 42 4 -0.17 76 0 0 40 33 21 1 46 50.8 27 263 5 40 48 19 40 18 24 41 22 35 39 44 15 -0.17 77 0 0 40 35 7 1 46 47.2 26 263 5 40 50 4 40 20 10 41 24 19 39 46 1 -0.17 78 0 0 40 36 28 1 46 43.7 25 264 6 40 51 25 40 21 31 41 25 39 39 47 23 -0.17 79 0 0 40 37 25 1 46 40.2 25 265 7 40 52 22 40 22 28 41 26 36 39 48 21 -0.17 80 0 0 40 37 58 1 46 36.9 24 265 7 40 52 55 40 23 1 41 27 8 39 48 54 -0.17 81 0 0 40 38 6 1 46 33.7 23 266 8 40 53 3 40 23 10 41 27 16 39 49 3 -0.17 82 0 0 40 37 51 1 46 30.5 22 267 9 40 52 48 40 22 55 41 27 1 39 48 48 -0.17 83 0 0 40 37 11 1 46 27.5 22 267 10 40 52 8 40 22 15 41 26 21 39 48 8 -0.17 84 0 0 40 36 7 1 46 24.5 21 268 10 40 51 4 40 21 10 41 25 18 39 47 3 -0.17 85 0 0 40 34 39 1 46 21.7 20 269 11 40 49 36 40 19 42 41 23 50 39 45 34 -0.17 86 0 0 40 32 46 1 46 18.9 19 269 12 40 47 43 40 17 49 41 21 58 39 43 40 -0.17 87 0 0 40 30 28 1 46 16.3 19 270 12 40 45 26 40 15 31 41 19 42 39 41 22 -0.17 88 0 0 40 27 47 1 46 13.7 18 271 13 40 42 45 40 12 49 41 17 2 39 38 39 -0.17 89 0 0 40 24 40 1 46 11.2 17 271 14 40 39 39 40 9 42 41 13 57 39 35 31 -0.17 90 0 0 40 21 9 1 46 8.9 16 272 14 40 36 9 40 6 11 41 10 28 39 31 58 -0.17 91 0 0 40 17 14 1 46 6.6 16 272 15 40 32 14 40 2 14 41 6 34 39 28 0 -0.17 92 0 0 40 12 53 1 46 4.4 15 273 16 40 27 54 39 57 53 41 2 16 39 23 37 -0.17 93 0 0 40 8 8 1 46 2.4 14 274 16 40 23 9 39 53 7 40 57 33 39 18 49 -0.17 94 0 0 40 2 57 1 46 0.4 13 274 17 40 18 0 39 47 55 40 52 26 39 13 36 -0.17 95 0 0 39 57 22 1 45 58.5 13 275 18 40 12 25 39 42 19 40 46 53 39 7 57 -0.17 96 0 0 39 51 21 1 45 56.8 12 276 19 40 6 25 39 36 17 40 40 56 39 1 53 -0.17 97 0 0 39 44 55 1 45 55.1 11 276 19 40 0 0 39 29 50 40 34 33 38 55 23 -0.18 98 0 0 39 38 3 1 45 53.6 10 277 20 39 53 10 39 22 57 40 27 45 38 48 28 -0.18 99 0 0 39 30 46 1 45 52.1 9 278 21 39 45 53 39 15 38 40 20 32 38 41 6 -0.18 100 0 0 39 23 3 1 45 50.8 9 278 21 39 38 12 39 7 54 40 12 53 38 33 19 -0.18 101 0 0 39 14 54 1 45 49.6 8 279 22 39 30 4 38 59 44 40 4 49 38 25 6 -0.18 102 0 0 39 6 19 1 45 48.5 7 279 23 39 21 31 38 51 7 39 56 18 38 16 26 -0.18 103 0 0 38 57 18 1 45 47.5 6 280 23 39 12 31 38 42 5 39 47 22 38 7 20 -0.18 104 0 0 38 47 50 1 45 46.6 5 281 24 39 3 5 38 32 36 39 38 0 37 57 48 -0.19 105 0 0 38 37 56 1 45 45.8 5 281 25 38 53 13 38 22 40 39 28 11 37 47 48 -0.19 106 0 0 38 27 36 1 45 45.1 4 282 25 38 42 54 38 12 18 39 17 56 37 37 22 -0.20 107 0 0 38 16 48 1 45 44.6 3 283 26 38 32 8 38 1 29 39 7 15 37 26 29 -0.21 108 0 0 38 5 34 1 45 44.2 2 283 27 38 20 56 37 50 13 38 56 6 37 15 9 -0.22 109 0 0 37 53 52 1 45 43.9 1 284 28 38 9 16 37 38 29 38 44 31 37 3 21 -0.26 110 0 0 37 41 44 1 45 43.7 1 284 28 37 57 9 37 26 19 38 32 29 36 51 6 -0.39 Uncertainty in time = +/- 8 secs Prediction of 2022 Oct 17.0 Data for the target star ------------------------ * name: UCAC4-509-007821 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 40 45.3067 DE: +11 46 24.352 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 40 45.3067 DE: +11 46 24.351 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4902) Thessandrus asteroid class: approx. diameter [km]: 55 approx. diameter ["]: 0.018 distance from Earth [AU]: 4.19180 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.028", 0.019", 83.811° remarks: * orbital elements for (4902)Thessandrus : Mean anomaly = 342.8798212642 deg Arg. of pericenter = 271.4549467574 deg Long. of node = 170.2787858594 deg Inclination = 9.0754355819 deg Eccentricity = 0.0439958186 Semimajor axis = 5.2024862584 AU Perihelion dist = 4.9735986165 AU Mag: H = 9.93, G = 0.15 Epoch of elements : MJD 59876.08034722 TDT (2022 Oct 24.0803) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542022Sep21,5.23,2022,10,24,1.930102,-0.082909,0.145527,-5.161040,-2.818231,-0.003984,0.000296,0.000001,0.000000 9.0975,11.8187,147.11,-11.70,False UCAC4-509-007821,4.67925187,11.7734310,0.00,12.50,0.00,0.0,0,,4.70044232,11.8187242,4.60,0.00,0,0,0 4902,Thessandrus,17.08,54.5,4.1918,0,0,-0.737,-5.91,,4.6,0 0,342.7901,2022,10,23,271.4549,170.2788,9.0754,0.04400,5.20249,4.97360,9.94,5.0,0.15 2.143,0.0277,0.0190,84,0.0205,Known errors,-1.00,-1,-1,-1 20221024_007821,59868.96 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Oct 16, 23:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org