IOTA/IOTA-ES occultation update for (108) Hecuba / UCAC4 595-031971 event on 2023 Nov 22, 08:29 UT Visible from USA Summary ------- On 2023 Nov 22 UT, the 71.7 km diameter asteroid (108) Hecuba will occult a 12.4 mag star in the constellation Auriga for observers along a path across USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.22 mag to 13.23 mag (the magnitude of the asteroid) for at most 8.410 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 Nov 22, 08:16 - 2023 Nov 22, 08:42 * geocentric midpoint of event [JD]: 2460270.85377620 * magnitude of target star: 12.44 * magnitude drop [mag]: 1.22 * estimated maximum duration [s]: 8.410 * Moon: 71 % sunlit, 101° distance * Sun: 143° distance * rough path description: USA The occultation path -------------------- * approximate projected width [km]: 72 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 2.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.001", 93°) * approx speed of asteroid's shadow [km/s]: 8.5246 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 595-031971 by 108 Hecuba on 2023 Nov 22 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 168 0 0 15 17 16 8 41 51.2 1 60 -35 15 39 44 14 54 49 15 42 8 14 52 26 .... 169 0 0 15 50 30 8 41 50.8 2 60 -36 16 12 55 15 28 6 16 15 19 15 25 43 -0.13 170 0 0 16 23 23 8 41 50.2 3 61 -37 16 45 45 16 1 1 16 48 8 15 58 38 -0.10 171 0 0 16 55 53 8 41 49.2 4 61 -38 17 18 12 16 33 34 17 20 35 16 31 11 -0.09 172 0 0 17 27 59 8 41 48.1 5 61 -39 17 50 16 17 5 44 17 52 38 17 3 21 -0.09 173 0 0 17 59 43 8 41 46.6 6 62 -40 18 21 56 17 37 30 18 24 18 17 35 8 -0.08 174 0 0 18 31 2 8 41 44.9 7 62 -41 18 53 12 18 8 52 18 55 34 18 6 30 -0.08 175 0 0 19 1 56 8 41 42.9 9 62 -42 19 24 3 18 39 50 19 26 25 18 37 28 -0.08 176 0 0 19 32 25 8 41 40.7 10 63 -43 19 54 29 19 10 22 19 56 50 19 8 1 -0.08 177 0 0 20 2 29 8 41 38.3 11 63 -44 20 24 29 19 40 29 20 26 50 19 38 8 -0.07 178 0 0 20 32 6 8 41 35.6 12 63 -45 20 54 4 20 10 10 20 56 24 20 7 49 -0.07 179 0 0 21 1 18 8 41 32.7 13 64 -46 21 23 12 20 39 24 21 25 32 20 37 4 -0.07 -180 0 0 21 30 2 8 41 29.6 14 64 -47 21 51 53 21 8 12 21 54 13 21 5 53 -0.07 -179 0 0 21 58 20 8 41 26.2 15 64 -48 22 20 7 21 36 33 22 22 27 21 34 14 -0.07 -178 0 0 22 26 10 8 41 22.7 16 65 -49 22 47 54 22 4 27 22 50 13 22 2 8 -0.07 -177 0 0 22 53 33 8 41 18.9 17 65 -50 23 15 13 22 31 53 23 17 32 22 29 35 -0.07 -176 0 0 23 20 28 8 41 15.0 18 66 -51 23 42 5 22 58 52 23 44 23 22 56 34 -0.07 -175 0 0 23 46 55 8 41 10.8 19 66 -52 24 8 29 23 25 23 24 10 47 23 23 5 -0.07 -174 0 0 24 12 54 8 41 6.5 20 66 -53 24 34 24 23 51 25 24 36 42 23 49 7 -0.07 -173 0 0 24 38 25 8 41 2.0 21 67 -54 24 59 52 24 16 59 25 2 9 24 14 42 -0.07 -172 0 0 25 3 28 8 40 57.3 22 67 -54 25 24 50 24 42 5 25 27 7 24 39 48 -0.07 -171 0 0 25 28 2 8 40 52.4 23 68 -55 25 49 21 25 6 43 25 51 38 25 4 26 -0.07 -170 0 0 25 52 7 8 40 47.4 24 68 -56 26 13 23 25 30 52 26 15 39 25 28 35 -0.07 -169 0 0 26 15 44 8 40 42.2 25 68 -57 26 36 56 25 54 32 26 39 12 25 52 16 -0.07 -168 0 0 26 38 52 8 40 36.8 26 69 -58 27 0 1 26 17 43 27 2 17 26 15 28 -0.07 -167 0 0 27 1 31 8 40 31.3 27 69 -59 27 22 37 26 40 26 27 24 52 26 38 11 -0.07 -166 0 0 27 23 42 8 40 25.7 28 70 -60 27 44 45 27 2 41 27 46 59 27 0 26 -0.07 -165 0 0 27 45 24 8 40 19.9 28 70 -60 28 6 23 27 24 26 28 8 38 27 22 12 -0.07 -164 0 0 28 6 38 8 40 14.0 29 71 -61 28 27 33 27 45 43 28 29 48 27 43 29 -0.07 -163 0 0 28 27 23 8 40 7.9 30 71 -62 28 48 15 28 6 31 28 50 29 28 4 17 -0.07 -162 0 0 28 47 39 8 40 1.7 31 72 -63 29 8 28 28 26 50 29 10 41 28 24 37 -0.07 -161 0 0 29 7 27 8 39 55.4 32 72 -63 29 28 12 28 46 41 29 30 25 28 44 28 -0.08 -160 0 0 29 26 46 8 39 49.0 33 73 -64 29 47 28 29 6 4 29 49 41 29 3 51 -0.08 -159 0 0 29 45 37 8 39 42.4 34 73 -65 30 6 16 29 24 57 30 8 28 29 22 45 -0.08 -158 0 0 30 3 59 8 39 35.8 35 74 -66 30 24 36 29 43 23 30 26 48 29 41 11 -0.08 -157 0 0 30 21 53 8 39 29.0 36 74 -66 30 42 27 30 1 20 30 44 38 29 59 9 -0.08 -156 0 0 30 39 19 8 39 22.1 37 75 -67 30 59 50 30 18 49 31 2 1 30 16 38 -0.08 -155 0 0 30 56 17 8 39 15.2 38 75 -68 31 16 45 30 35 50 31 18 56 30 33 39 -0.08 -154 0 0 31 12 48 8 39 8.1 38 76 -68 31 33 12 30 52 23 31 35 23 30 50 13 -0.08 -153 0 0 31 28 50 8 39 0.9 39 77 -69 31 49 12 31 8 29 31 51 22 31 6 18 -0.08 -152 0 0 31 44 25 8 38 53.7 40 77 -69 32 4 44 31 24 6 32 6 54 31 21 56 -0.08 -151 0 0 31 59 32 8 38 46.3 41 78 -70 32 19 48 31 39 16 32 21 58 31 37 6 -0.08 -150 0 0 32 14 11 8 38 38.9 42 78 -71 32 34 25 31 53 58 32 36 35 31 51 49 -0.08 -149 0 0 32 28 24 8 38 31.3 43 79 -71 32 48 35 32 8 13 32 50 44 32 6 4 -0.08 -148 0 0 32 42 9 8 38 23.7 44 79 -72 33 2 17 32 22 1 33 4 26 32 19 52 -0.08 -147 0 0 32 55 27 8 38 16.0 44 80 -72 33 15 33 32 35 21 33 17 42 32 33 12 -0.08 -146 0 0 33 8 18 8 38 8.3 45 81 -73 33 28 22 32 48 14 33 30 30 32 46 6 -0.08 -145 0 0 33 20 42 8 38 0.4 46 81 -73 33 40 44 33 0 41 33 42 52 32 58 33 -0.08 -144 0 0 33 32 40 8 37 52.5 47 82 -73 33 52 39 33 12 41 33 54 47 33 10 33 -0.08 -143 0 0 33 44 11 8 37 44.5 48 82 -74 34 4 8 33 24 14 34 6 16 33 22 6 -0.08 -142 0 0 33 55 15 8 37 36.5 48 83 -74 34 15 10 33 35 21 34 17 18 33 33 13 -0.08 -141 0 0 34 5 53 8 37 28.4 49 84 -74 34 25 46 33 46 1 34 27 54 33 43 54 -0.08 -140 0 0 34 16 5 8 37 20.2 50 84 -74 34 35 56 33 56 15 34 38 4 33 54 8 -0.08 -139 0 0 34 25 51 8 37 11.9 51 85 -75 34 45 41 34 6 3 34 47 48 34 3 56 -0.08 -138 0 0 34 35 11 8 37 3.6 52 86 -75 34 54 59 34 15 24 34 57 6 34 13 18 -0.08 -137 0 0 34 44 6 8 36 55.2 53 86 -75 35 3 51 34 24 20 35 5 58 34 22 14 -0.08 -136 0 0 34 52 34 8 36 46.8 53 87 -75 35 12 18 34 32 50 35 14 25 34 30 44 -0.08 -135 0 0 35 0 37 8 36 38.3 54 88 -75 35 20 19 34 40 55 35 22 26 34 38 49 -0.08 -134 0 0 35 8 14 8 36 29.8 55 88 -75 35 27 55 34 48 34 35 30 1 34 46 28 -0.08 -133 0 0 35 15 26 8 36 21.1 56 89 -75 35 35 6 34 55 47 35 37 12 34 53 41 -0.08 -132 0 0 35 22 13 8 36 12.5 56 90 -75 35 41 51 35 2 35 35 43 57 35 0 29 -0.08 -131 0 0 35 28 34 8 36 3.8 57 90 -75 35 48 11 35 8 58 35 50 17 35 6 52 -0.08 -130 0 0 35 34 30 8 35 55.0 58 91 -74 35 54 6 35 14 55 35 56 12 35 12 50 -0.08 -129 0 0 35 40 2 8 35 46.2 59 92 -74 35 59 37 35 20 27 36 1 42 35 18 22 -0.08 -128 0 0 35 45 8 8 35 37.3 60 93 -74 36 4 42 35 25 35 36 6 47 35 23 30 -0.08 -127 0 0 35 49 49 8 35 28.4 60 93 -74 36 9 22 35 30 17 36 11 28 35 28 12 -0.09 -126 0 0 35 54 6 8 35 19.4 61 94 -73 36 13 38 35 34 35 36 15 43 35 32 30 -0.09 -125 0 0 35 57 58 8 35 10.3 62 95 -73 36 17 29 35 38 27 36 19 34 35 36 22 -0.09 -124 0 0 36 1 25 8 35 1.3 63 96 -72 36 20 56 35 41 55 36 23 1 35 39 50 -0.09 -123 0 0 36 4 28 8 34 52.1 63 97 -72 36 23 58 35 44 58 36 26 3 35 42 53 -0.09 -122 0 0 36 7 6 8 34 43.0 64 97 -72 36 26 35 35 47 37 36 28 40 35 45 32 -0.09 -121 0 0 36 9 19 8 34 33.7 65 98 -71 36 28 48 35 49 51 36 30 53 35 47 46 -0.09 -120 0 0 36 11 8 8 34 24.5 66 99 -71 36 30 37 35 51 40 36 32 42 35 49 35 -0.09 -119 0 0 36 12 33 8 34 15.1 67 100 -70 36 32 1 35 53 5 36 34 6 35 51 0 -0.09 -118 0 0 36 13 33 8 34 5.8 67 101 -70 36 33 1 35 54 5 36 35 6 35 52 1 -0.09 -117 0 0 36 14 9 8 33 56.4 68 102 -69 36 33 37 35 54 41 36 35 42 35 52 37 -0.09 -116 0 0 36 14 20 8 33 46.9 69 103 -69 36 33 48 35 54 53 36 35 53 35 52 48 -0.09 -115 0 0 36 14 8 8 33 37.4 70 104 -68 36 33 36 35 54 40 36 35 40 35 52 35 -0.09 -114 0 0 36 13 30 8 33 27.8 70 105 -67 36 32 59 35 54 3 36 35 3 35 51 58 -0.09 -113 0 0 36 12 29 8 33 18.2 71 106 -67 36 31 57 35 53 1 36 34 2 35 50 56 -0.09 -112 0 0 36 11 3 8 33 8.6 72 107 -66 36 30 32 35 51 35 36 32 37 35 49 30 -0.09 -111 0 0 36 9 13 8 32 58.9 72 109 -66 36 28 42 35 49 44 36 30 47 35 47 40 -0.09 -110 0 0 36 6 58 8 32 49.2 73 110 -65 36 26 28 35 47 29 36 28 33 35 45 25 -0.09 -109 0 0 36 4 20 8 32 39.4 74 111 -64 36 23 50 35 44 50 36 25 55 35 42 45 -0.09 -108 0 0 36 1 17 8 32 29.5 75 113 -64 36 20 47 35 41 46 36 22 52 35 39 41 -0.09 -107 0 0 35 57 49 8 32 19.7 75 114 -63 36 17 21 35 38 18 36 19 26 35 36 13 -0.09 -106 0 0 35 53 57 8 32 9.8 76 116 -63 36 13 29 35 34 25 36 15 34 35 32 20 -0.09 -105 0 0 35 49 41 8 31 59.8 77 118 -62 36 9 14 35 30 8 36 11 19 35 28 3 -0.09 -104 0 0 35 45 0 8 31 49.8 78 120 -61 36 4 34 35 25 26 36 6 39 35 23 21 -0.09 -103 0 0 35 39 54 8 31 39.7 78 122 -61 35 59 30 35 20 20 36 1 35 35 18 15 -0.09 -102 0 0 35 34 25 8 31 29.7 79 124 -60 35 54 1 35 14 49 35 56 6 35 12 43 -0.09 -101 0 0 35 28 30 8 31 19.5 80 127 -59 35 48 7 35 8 53 35 50 13 35 6 48 -0.09 -100 0 0 35 22 11 8 31 9.3 80 130 -59 35 41 49 35 2 33 35 43 55 35 0 27 -0.09 - 99 0 0 35 15 27 8 30 59.1 81 133 -58 35 35 7 34 55 48 35 37 13 34 53 42 -0.09 - 98 0 0 35 8 18 8 30 48.8 81 137 -57 35 28 0 34 48 37 35 30 6 34 46 31 -0.09 - 97 0 0 35 0 45 8 30 38.5 82 141 -56 35 20 27 34 41 2 35 22 34 34 38 56 -0.09 - 96 0 0 34 52 46 8 30 28.2 83 146 -56 35 12 31 34 33 2 35 14 37 34 30 56 -0.09 - 95 0 0 34 44 23 8 30 17.8 83 152 -55 35 4 9 34 24 37 35 6 15 34 22 31 -0.09 - 94 0 0 34 35 34 8 30 7.3 84 158 -54 34 55 22 34 15 47 34 57 29 34 13 41 -0.10 - 93 0 0 34 26 21 8 29 56.9 84 166 -54 34 46 10 34 6 32 34 48 17 34 4 25 -0.10 - 92 0 0 34 16 42 8 29 46.3 84 174 -53 34 36 33 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23 9 44 22 26 36 23 12 2 22 24 18 -0.08 - 53 0 0 22 21 31 8 22 37.7 56 289 -20 22 43 9 21 59 54 22 45 27 21 57 36 -0.08 - 52 0 0 21 54 28 8 22 27.0 55 290 -19 22 16 9 21 32 48 22 18 27 21 30 30 -0.08 - 51 0 0 21 27 0 8 22 16.2 54 290 -18 21 48 44 21 5 18 21 51 3 21 2 59 -0.08 - 50 0 0 20 59 8 8 22 5.6 53 291 -17 21 20 55 20 37 23 21 23 14 20 35 3 -0.08 - 49 0 0 20 30 52 8 21 55.0 52 291 -16 20 52 41 20 9 4 20 55 1 20 6 44 -0.08 - 48 0 0 20 2 12 8 21 44.5 51 292 -15 20 24 5 19 40 21 20 26 25 19 38 1 -0.08 - 47 0 0 19 33 9 8 21 34.1 50 292 -14 19 55 4 19 11 15 19 57 25 19 8 55 -0.08 - 46 0 0 19 3 43 8 21 23.8 49 293 -13 19 25 41 18 41 47 19 28 2 18 39 26 -0.07 - 45 0 0 18 33 55 8 21 13.6 48 293 -12 18 55 55 18 11 55 18 58 16 18 9 35 -0.07 - 44 0 0 18 3 45 8 21 3.5 47 293 -11 18 25 47 17 41 42 18 28 9 17 39 21 -0.07 - 43 0 0 17 33 12 8 20 53.5 46 294 -10 17 55 18 17 11 8 17 57 39 17 8 46 -0.07 - 42 0 0 17 2 19 8 20 43.7 45 294 -9 17 24 27 16 40 12 17 26 49 16 37 50 -0.07 - 41 0 0 16 31 6 8 20 33.9 44 295 -8 16 53 16 16 8 56 16 55 38 16 6 34 -0.07 - 40 0 0 15 59 32 8 20 24.3 43 295 -7 16 21 45 15 37 20 16 24 7 15 34 58 -0.07 - 39 0 0 15 27 39 8 20 14.9 42 295 -6 15 49 54 15 5 24 15 52 16 15 3 2 -0.07 - 38 0 0 14 55 27 8 20 5.5 41 296 -5 15 17 44 14 33 10 15 20 7 14 30 48 -0.07 - 37 0 0 14 22 57 8 19 56.4 40 296 -4 14 45 16 14 0 38 14 47 39 13 58 15 -0.07 - 36 0 0 13 50 9 8 19 47.4 39 296 -2 14 12 31 13 27 48 14 14 54 13 25 25 -0.07 - 35 0 0 13 17 5 8 19 38.5 38 297 -1 13 39 28 12 54 42 13 41 51 12 52 19 -0.07 - 34 0 0 12 43 44 8 19 29.9 37 297 0 13 6 9 12 21 20 13 8 33 12 18 56 -0.07 - 33 0 0 12 10 8 8 19 21.4 36 297 1 12 32 35 11 47 42 12 34 59 11 45 18 -0.07 - 32 0 0 11 36 18 8 19 13.1 35 297 2 11 58 46 11 13 50 12 1 10 11 11 26 -0.07 - 31 0 0 11 2 13 8 19 5.0 33 298 3 11 24 44 10 39 44 11 27 8 10 37 20 -0.07 - 30 0 0 10 27 56 8 18 57.2 32 298 4 10 50 28 10 5 25 10 52 52 10 3 1 -0.07 - 29 0 0 9 53 27 8 18 49.5 31 298 5 10 16 0 9 30 55 10 18 24 9 28 31 -0.07 - 28 0 0 9 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- 5 32 0 - 6 16 37 - 5 29 37 - 6 19 0 -0.49 Uncertainty in time = +/- 3 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: UCAC4 595-031971 * constellation : Auriga * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 26 52.3619 DE: +28 55 27.711 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 26 52.3620 DE: +28 55 27.711 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (108) Hecuba asteroid class: approx. diameter [km]: 72 approx. diameter ["]: 0.040 distance from Earth [AU]: 2.46990 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#75 date of fit: 2023 Oct 09 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", 0.001", 93.411° remarks: * orbital elements for (108)Hecuba : Mean anomaly = 249.6939833896 deg Arg. of pericenter = 212.7621293767 deg Long. of node = 349.7449811599 deg Inclination = 4.2094473397 deg Eccentricity = 0.0626567464 Semimajor axis = 3.2326846845 AU Perihelion dist = 3.0301351801 AU Mag: H = 8.01, G = 0.15 Epoch of elements : MJD 60270.35361111 TDT (2023 Nov 22.3536) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#752023Oct09,8.41,2023,11,22,8.490629,0.017829,0.084822,-4.707600,0.994716,-0.003556,-0.000297,0.000001,0.000000 -91.3327,28.9102,49.15,-20.10,False UCAC4 595-031971,6.44787831,28.9243642,0.00,12.44,0.00,0.0,0,,6.47334841,28.9101846,1.22,0.00,0,0,0 108,Hecuba,13.23,71.700,2.4699,0,0,-1.277,3.54,,3.8,0 0,249.6340,2023,11,22,212.7621,349.7450,4.2094,0.06266,3.23268,3.03014,8.01,5.0,0.15 1.053,0.0127,0.0010,93,0.0127,Known errors,-1.00,0,-1,-1 20231122_031971,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org