IOTA/IOTA-ES occultation update for (179) Klytaemnestra / UCAC4 333-082347 event on 2024 Jan 20, 12:30 UT Visible from Summary ------- On 2024 Jan 20 UT, the 68.668 km diameter asteroid (179) Klytaemnestra will occult a 11.5 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.86 mag to 14.26 mag (the magnitude of the asteroid) for at most 2.080 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: 2024 Jan 20, 12:26 - 2024 Jan 20, 12:33 * geocentric midpoint of event [JD]: 2460330.02084966 * magnitude of target star: 11.48 * magnitude drop [mag]: 2.86 * estimated maximum duration [s]: 2.080 * Moon: 75 % sunlit, 176° distance * Sun: 56° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 73 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.002", 92°) * approx speed of asteroid's shadow [km/s]: 33.0628 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 333-082347 by 179 Klytaemnestra on 2024 Jan 20 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 -141 0 0 26 49 28 12 27 1.0 1 117 -50 26 27 16 27 11 43 26 22 59 27 16 1 .... -140 0 0 26 22 11 12 27 1.0 2 117 -49 25 59 58 26 44 27 25 55 41 26 48 46 -0.16 -139 0 0 25 54 43 12 27 1.2 3 118 -48 25 32 29 26 17 0 25 28 12 26 21 18 -0.24 -138 0 0 25 27 3 12 27 1.4 4 118 -47 25 4 49 25 49 21 25 0 32 25 53 40 -0.27 -137 0 0 24 59 14 12 27 1.6 5 119 -46 24 36 59 25 21 33 24 32 42 25 25 52 -0.29 -136 0 0 24 31 15 12 27 2.0 6 119 -46 24 9 0 24 53 34 24 4 42 24 57 53 -0.31 -135 0 0 24 3 7 12 27 2.4 7 120 -45 23 40 52 24 25 27 23 36 34 24 29 46 -0.32 -134 0 0 23 34 52 12 27 2.8 8 120 -44 23 12 35 23 57 11 23 8 18 24 1 31 -0.32 -133 0 0 23 6 28 12 27 3.3 9 120 -43 22 44 12 23 28 48 22 39 54 23 33 8 -0.33 -132 0 0 22 37 59 12 27 3.9 10 121 -42 22 15 42 23 0 19 22 11 24 23 4 38 -0.33 -131 0 0 22 9 23 12 27 4.6 11 121 -41 21 47 6 22 31 43 21 42 48 22 36 2 -0.34 -130 0 0 21 40 42 12 27 5.4 12 122 -40 21 18 25 22 3 2 21 14 8 22 7 21 -0.34 -129 0 0 21 11 56 12 27 6.2 13 122 -39 20 49 40 21 34 16 20 45 23 21 38 35 -0.34 -128 0 0 20 43 8 12 27 7.0 14 122 -38 20 20 52 21 5 27 20 16 34 21 9 46 -0.34 -127 0 0 20 14 16 12 27 8.0 15 123 -37 19 52 0 20 36 35 19 47 43 20 40 54 -0.35 -126 0 0 19 45 22 12 27 9.0 16 123 -36 19 23 7 20 7 41 19 18 50 20 12 0 -0.35 -125 0 0 19 16 27 12 27 10.1 17 123 -35 18 54 13 19 38 45 18 49 56 19 43 4 -0.35 -124 0 0 18 47 32 12 27 11.3 18 124 -34 18 25 19 19 9 49 18 21 2 19 14 8 -0.35 -123 0 0 18 18 37 12 27 12.5 19 124 -33 17 56 25 18 40 54 17 52 8 18 45 12 -0.35 -122 0 0 17 49 44 12 27 13.8 20 125 -32 17 27 32 18 11 59 17 23 15 18 16 17 -0.35 -121 0 0 17 20 53 12 27 15.2 21 125 -31 16 58 42 17 43 7 16 54 25 17 47 25 -0.35 -120 0 0 16 52 4 12 27 16.6 22 125 -29 16 29 54 17 14 17 16 25 38 17 18 35 -0.35 -119 0 0 16 23 19 12 27 18.1 24 126 -28 16 1 11 16 45 31 15 56 55 16 49 49 -0.36 -118 0 0 15 54 39 12 27 19.7 25 126 -27 15 32 32 16 16 50 15 28 16 16 21 7 -0.36 -117 0 0 15 26 4 12 27 21.3 26 126 -26 15 3 59 15 48 13 14 59 43 15 52 30 -0.36 -116 0 0 14 57 36 12 27 23.0 27 127 -25 14 35 32 15 19 43 14 31 16 15 24 0 -0.36 -115 0 0 14 29 14 12 27 24.8 28 127 -24 14 7 12 14 51 20 14 2 57 14 55 37 -0.36 -114 0 0 14 1 0 12 27 26.7 29 127 -23 13 38 59 14 23 5 13 34 45 14 27 21 -0.36 -113 0 0 13 32 55 12 27 28.6 30 128 -22 13 10 56 13 54 58 13 6 42 13 59 13 -0.36 -112 0 0 13 4 59 12 27 30.5 31 128 -21 12 43 2 13 27 0 12 38 48 13 31 15 -0.36 -111 0 0 12 37 14 12 27 32.6 32 129 -20 12 15 18 12 59 12 12 11 5 13 3 27 -0.36 -110 0 0 12 9 39 12 27 34.7 33 129 -19 11 47 45 12 31 36 11 43 32 12 35 50 -0.36 -109 0 0 11 42 16 12 27 36.8 34 129 -18 11 20 24 12 4 10 11 16 11 12 8 25 -0.36 -108 0 0 11 15 5 12 27 39.1 35 130 -17 10 53 16 11 36 58 10 49 3 11 41 11 -0.36 -107 0 0 10 48 7 12 27 41.3 36 130 -16 10 26 20 11 9 58 10 22 8 11 14 11 -0.36 -106 0 0 10 21 24 12 27 43.7 37 131 -14 9 59 39 10 43 12 9 55 27 10 47 25 -0.36 -105 0 0 9 54 54 12 27 46.1 38 131 -13 9 33 12 10 16 40 9 29 0 10 20 53 -0.36 -104 0 0 9 28 40 12 27 48.5 39 131 -12 9 7 0 9 50 24 9 2 49 9 54 36 -0.36 -103 0 0 9 2 42 12 27 51.0 40 132 -11 8 41 4 9 24 24 8 36 54 9 28 35 -0.36 -102 0 0 8 37 1 12 27 53.6 41 132 -10 8 15 25 8 58 40 8 11 15 9 2 51 -0.37 -101 0 0 8 11 36 12 27 56.2 42 133 -9 7 50 3 8 33 13 7 45 54 8 37 23 -0.37 -100 0 0 7 46 29 12 27 58.8 43 133 -8 7 24 59 8 8 3 7 20 50 8 12 14 -0.37 - 99 0 0 7 21 41 12 28 1.5 44 134 -7 7 0 13 7 43 13 6 56 4 7 47 22 -0.37 - 98 0 0 6 57 12 12 28 4.3 45 134 -6 6 35 46 7 18 41 6 31 38 7 22 50 -0.37 - 97 0 0 6 33 2 12 28 7.1 46 135 -5 6 11 39 6 54 28 6 7 31 6 58 37 -0.37 - 96 0 0 6 9 12 12 28 9.9 47 135 -4 5 47 51 6 30 36 5 43 44 6 34 44 -0.37 - 95 0 0 5 45 43 12 28 12.8 48 136 -3 5 24 25 6 7 4 5 20 18 6 11 12 -0.37 - 94 0 0 5 22 34 12 28 15.7 49 137 -2 5 1 19 5 43 53 4 57 13 5 48 0 -0.37 - 93 0 0 4 59 48 12 28 18.7 50 137 0 4 38 35 5 21 4 4 34 29 5 25 11 -0.37 - 92 0 0 4 37 23 12 28 21.7 51 138 1 4 16 13 4 58 36 4 12 8 5 2 43 -0.37 - 91 0 0 4 15 21 12 28 24.7 52 139 2 3 54 13 4 36 32 3 50 9 4 40 37 -0.37 - 90 0 0 3 53 41 12 28 27.8 53 139 3 3 32 36 4 14 50 3 28 32 4 18 55 -0.37 - 89 0 0 3 32 25 12 28 30.9 54 140 4 3 11 23 3 53 31 3 7 19 3 57 36 -0.37 - 88 0 0 3 11 33 12 28 34.0 55 141 5 2 50 33 3 32 36 2 46 30 3 36 40 -0.37 - 87 0 0 2 51 5 12 28 37.2 56 142 6 2 30 7 3 12 5 2 26 5 3 16 9 -0.37 - 86 0 0 2 31 1 12 28 40.3 57 143 7 2 10 6 2 51 59 2 6 4 2 56 2 -0.37 - 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3 1 51 -0.38 - 60 0 0 - 3 34 1 12 30 8.5 69 194 34 - 3 54 4 - 3 13 55 - 3 57 56 - 3 10 2 -0.38 - 59 0 0 - 3 41 41 12 30 11.9 69 196 35 - 4 1 43 - 3 21 37 - 4 5 35 - 3 17 44 -0.38 - 58 0 0 - 3 48 52 12 30 15.3 69 199 36 - 4 8 53 - 3 28 49 - 4 12 44 - 3 24 56 -0.38 - 57 0 0 - 3 55 34 12 30 18.8 69 201 37 - 4 15 34 - 3 35 32 - 4 19 25 - 3 31 40 -0.38 - 56 0 0 - 4 1 47 12 30 22.2 68 204 38 - 4 21 45 - 3 41 46 - 4 25 36 - 3 37 53 -0.38 - 55 0 0 - 4 7 30 12 30 25.6 68 206 39 - 4 27 28 - 3 47 30 - 4 31 19 - 3 43 38 -0.38 - 54 0 0 - 4 12 44 12 30 28.9 68 208 40 - 4 32 41 - 3 52 45 - 4 36 31 - 3 48 53 -0.38 - 53 0 0 - 4 17 29 12 30 32.3 67 211 41 - 4 37 25 - 3 57 30 - 4 41 15 - 3 53 38 -0.38 - 52 0 0 - 4 21 44 12 30 35.7 67 213 42 - 4 41 39 - 4 1 46 - 4 45 30 - 3 57 54 -0.38 - 51 0 0 - 4 25 30 12 30 39.0 66 214 43 - 4 45 24 - 4 5 32 - 4 49 15 - 4 1 41 -0.38 - 50 0 0 - 4 28 46 12 30 42.3 66 216 43 - 4 48 40 - 4 8 49 - 4 52 30 - 4 4 58 -0.38 - 49 0 0 - 4 31 33 12 30 45.7 65 218 44 - 4 51 27 - 4 11 37 - 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4 6 43 - 4 50 25 - 4 2 52 -0.38 - 36 0 0 - 4 23 5 12 31 26.8 56 233 56 - 4 43 0 - 4 3 7 - 4 46 50 - 3 59 16 -0.38 - 35 0 0 - 4 19 0 12 31 29.8 55 234 57 - 4 38 56 - 3 59 2 - 4 42 46 - 3 55 10 -0.38 - 34 0 0 - 4 14 26 12 31 32.7 54 235 58 - 4 34 22 - 3 54 27 - 4 38 13 - 3 50 36 -0.38 - 33 0 0 - 4 9 23 12 31 35.7 53 235 59 - 4 29 20 - 3 49 23 - 4 33 11 - 3 45 31 -0.38 - 32 0 0 - 4 3 51 12 31 38.5 52 236 59 - 4 23 48 - 3 43 50 - 4 27 39 - 3 39 58 -0.38 - 31 0 0 - 3 57 49 12 31 41.4 51 236 60 - 4 17 48 - 3 37 48 - 4 21 39 - 3 33 55 -0.38 - 30 0 0 - 3 51 19 12 31 44.2 50 237 61 - 4 11 18 - 3 31 16 - 4 15 10 - 3 27 24 -0.38 - 29 0 0 - 3 44 19 12 31 47.0 49 237 62 - 4 4 20 - 3 24 15 - 4 8 11 - 3 20 23 -0.38 - 28 0 0 - 3 36 50 12 31 49.8 48 238 62 - 3 56 52 - 3 16 46 - 4 0 44 - 3 12 53 -0.38 - 27 0 0 - 3 28 53 12 31 52.5 48 238 63 - 3 48 56 - 3 8 47 - 3 52 48 - 3 4 54 -0.38 - 26 0 0 - 3 20 26 12 31 55.2 47 238 64 - 3 40 31 - 3 0 19 - 3 44 23 - 2 56 26 -0.38 - 25 0 0 - 3 11 31 12 31 57.8 46 239 64 - 3 31 37 - 2 51 23 - 3 35 30 - 2 47 29 -0.38 - 24 0 0 - 3 2 8 12 32 0.5 45 239 65 - 3 22 15 - 2 41 58 - 3 26 8 - 2 38 4 -0.38 - 23 0 0 - 2 52 15 12 32 3.0 44 239 66 - 3 12 24 - 2 32 4 - 3 16 17 - 2 28 10 -0.38 - 22 0 0 - 2 41 54 12 32 5.5 43 240 66 - 3 2 4 - 2 21 41 - 3 5 58 - 2 17 47 -0.38 - 21 0 0 - 2 31 5 12 32 8.0 42 240 67 - 2 51 17 - 2 10 51 - 2 55 10 - 2 6 56 -0.38 - 20 0 0 - 2 19 47 12 32 10.5 41 240 67 - 2 40 1 - 1 59 31 - 2 43 55 - 1 55 36 -0.38 - 19 0 0 - 2 8 2 12 32 12.9 40 241 68 - 2 28 17 - 1 47 44 - 2 32 11 - 1 43 48 -0.38 - 18 0 0 - 1 55 48 12 32 15.2 39 241 68 - 2 16 5 - 1 35 28 - 2 19 59 - 1 31 32 -0.38 - 17 0 0 - 1 43 6 12 32 17.5 38 241 68 - 2 3 25 - 1 22 44 - 2 7 20 - 1 18 48 -0.38 - 16 0 0 - 1 29 56 12 32 19.8 37 241 69 - 1 50 17 - 1 9 33 - 1 54 12 - 1 5 36 -0.38 - 15 0 0 - 1 16 19 12 32 22.0 36 241 69 - 1 36 42 - 0 55 54 - 1 40 37 - 0 51 57 -0.38 - 14 0 0 - 1 2 14 12 32 24.2 35 242 69 - 1 22 39 - 0 41 47 - 1 26 35 - 0 37 49 -0.38 - 13 0 0 - 0 47 42 12 32 26.3 34 242 69 - 1 8 9 - 0 27 13 - 1 12 5 - 0 23 15 -0.38 - 12 0 0 - 0 32 43 12 32 28.3 33 242 69 - 0 53 12 - 0 12 11 - 0 57 9 - 0 8 13 -0.38 - 11 0 0 - 0 17 17 12 32 30.3 32 242 69 - 0 37 48 0 3 17 - 0 41 45 0 7 16 -0.38 - 10 0 0 - 0 1 24 12 32 32.3 31 242 69 - 0 21 57 0 19 12 - 0 25 54 0 23 11 -0.38 - 9 0 0 0 14 56 12 32 34.2 30 242 69 - 0 5 39 0 35 34 - 0 9 38 0 39 34 -0.38 - 8 0 0 0 31 42 12 32 36.0 29 242 69 0 11 4 0 52 22 0 7 6 0 56 22 -0.38 - 7 0 0 0 48 54 12 32 37.8 28 243 69 0 28 14 1 9 37 0 24 15 1 13 37 -0.38 - 6 0 0 1 6 32 12 32 39.6 27 243 69 0 45 50 1 27 17 0 41 50 1 31 18 -0.38 - 5 0 0 1 24 35 12 32 41.2 26 243 68 1 3 51 1 45 23 0 59 51 1 49 24 -0.38 - 4 0 0 1 43 4 12 32 42.9 25 243 68 1 22 17 2 3 54 1 18 17 2 7 56 -0.38 - 3 0 0 2 1 58 12 32 44.4 24 243 68 1 41 8 2 22 50 1 37 7 2 26 52 -0.38 - 2 0 0 2 21 16 12 32 45.9 23 243 67 2 0 24 2 42 11 1 56 23 2 46 14 -0.38 - 1 0 0 2 40 59 12 32 47.3 22 243 67 2 20 5 3 1 57 2 16 3 3 6 0 -0.38 - 0 0 0 3 1 6 12 32 48.7 21 243 66 2 40 9 3 22 6 2 36 7 3 26 10 -0.38 1 0 0 3 21 37 12 32 50.0 20 243 66 3 0 38 3 42 39 2 56 35 3 46 43 -0.38 2 0 0 3 42 31 12 32 51.3 19 244 65 3 21 29 4 3 36 3 17 26 4 7 40 -0.38 3 0 0 4 3 48 12 32 52.5 17 244 64 3 42 44 4 24 55 3 38 40 4 29 0 -0.38 4 0 0 4 25 28 12 32 53.6 16 244 64 4 4 21 4 46 37 4 0 16 4 50 43 -0.38 5 0 0 4 47 29 12 32 54.6 15 244 63 4 26 20 5 8 42 4 22 15 5 12 48 -0.38 6 0 0 5 9 53 12 32 55.6 14 244 62 4 48 41 5 31 8 4 44 35 5 35 14 -0.38 7 0 0 5 32 37 12 32 56.5 13 244 62 5 11 23 5 53 55 5 7 17 5 58 2 -0.38 8 0 0 5 55 43 12 32 57.4 12 244 61 5 34 26 6 17 3 5 30 20 6 21 10 -0.38 9 0 0 6 19 9 12 32 58.1 11 244 60 5 57 49 6 40 31 5 53 43 6 44 39 -0.38 10 0 0 6 42 54 12 32 58.8 10 245 59 6 21 32 7 4 19 6 17 25 7 8 28 -0.38 11 0 0 7 6 59 12 32 59.5 9 245 58 6 45 35 7 28 27 6 41 27 7 32 36 -0.38 12 0 0 7 31 23 12 33 0.0 8 245 57 7 9 56 7 52 53 7 5 48 7 57 3 -0.38 13 0 0 7 56 5 12 33 0.5 7 245 57 7 34 36 8 17 38 7 30 27 8 21 48 -0.38 14 0 0 8 21 5 12 33 0.9 6 245 56 7 59 33 8 42 40 7 55 24 8 46 50 -0.38 15 0 0 8 46 21 12 33 1.3 5 245 55 8 24 47 9 7 59 8 20 38 9 12 10 -0.38 16 0 0 9 11 55 12 33 1.6 4 245 54 8 50 18 9 33 34 8 46 8 9 37 46 -0.38 17 0 0 9 37 44 12 33 1.8 3 246 53 9 16 5 9 59 26 9 11 55 10 3 37 -0.39 18 0 0 10 3 48 12 33 1.9 1 246 52 9 42 7 10 25 32 9 37 56 10 29 44 -0.41 19 0 0 10 30 7 12 33 2.0 0 246 51 10 8 24 10 51 53 10 4 13 10 56 6 -0.51 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: UCAC4 333-082347 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 05 13.7960 DE: -23 33 24.525 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 05 13.7962 DE: -23 33 24.525 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.5 * B mag [mag]: 11.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (179) Klytaemnestra asteroid class: approx. diameter [km]: 69 approx. diameter ["]: 0.026 distance from Earth [AU]: 3.59520 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 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): 0.014", 0.002", 91.873° remarks: * orbital elements for (179)Klytaemnestra : Mean anomaly = 243.0022163034 deg Arg. of pericenter = 104.3394770549 deg Long. of node = 251.8273419985 deg Inclination = 7.8168355452 deg Eccentricity = 0.1097474190 Semimajor axis = 2.9743900896 AU Perihelion dist = 2.6479584541 AU Mag: H = 8.16, G = 0.15 Epoch of elements : MJD 60329.52084966 TDT (2024 Jan 20.5208) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,2.08,2024,1,20,12.500392,0.055342,0.347385,18.429649,-2.932792,-0.004929,0.000787,-0.000001,0.000000 -65.2363,-23.6217,-4.78,-20.16,False UCAC4 333-082347,16.08716553,-23.5568123,11.79,11.48,11.31,0.0,0,,16.11077978,-23.6216620,2.86,2.60,0,0,0 179,Klytaemnestra,14.26,68.668,3.5952,0,0,3.281,-7.17,,3.8,0 0,242.9021,2024,1,20,104.3395,251.8273,7.8168,0.10975,2.97439,2.64796,8.16,5.0,0.15 1.097,0.0140,0.0019,92,0.0025,Known errors,1.31,0,-1,-1 20240120_082347,60137.02 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:33 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org