IOTA/IOTA-ES occultation update for (545) Messalina / HIP 116732 event on 2023 Jul 08, 03:57 UT Visible from South America Summary ------- On 2023 Jul 08 UT, the 106.3 km diameter asteroid (545) Messalina will occult a 8.2 mag star in the constellation Pisces for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.59 mag to 13.74 mag (the magnitude of the asteroid) for at most 13.610 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 Jul 08, 03:46 - 2023 Jul 08, 04:08 * geocentric midpoint of event [JD]: 2460133.66510021 * magnitude of target star: 8.16 * magnitude drop [mag]: 5.59 * estimated maximum duration [s]: 13.610 * Moon: 71 % sunlit, 5° distance * Sun: 111° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 138 * 1 sigma uncertainty interval [path widths]: +/- 0.14 * 1 sigma uncertainty interval [seconds]: +/- 5.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.024, +/- 0.017) * 1 sigma uncertainty ellipse (major, minor, PA): (0.030", 0.004", 55°) * approx speed of asteroid's shadow [km/s]: 7.8094 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 116732 by 545 Messalina on 2023 Jul 8 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 ' " Longitude Longitude Longitude Longitude - 37 2 21 87 0 0 4 8 11.6 0 136 20 - 22 22 41 ... .. .. - 18 36 47 ... .. .. .... - 24 33 53 86 0 0 4 8 11.3 1 148 19 - 14 47 36 - 35 36 29 - 12 8 0 - 39 10 6 0.51 - 18 5 7 85 0 0 4 8 10.6 3 155 19 - 10 37 2 - 26 5 25 - 8 32 33 - 28 31 47 0.66 - 14 6 32 84 0 0 4 8 9.6 4 159 18 - 8 1 35 - 20 28 51 - 6 19 11 - 22 22 53 0.71 - 11 27 22 83 0 0 4 8 8.2 5 161 18 - 6 18 37 - 16 46 51 - 4 51 29 - 18 21 6 0.74 - 9 35 49 82 0 0 4 8 6.5 6 163 17 - 5 7 49 - 14 11 4 - 3 51 55 - 15 31 45 0.75 - 8 15 13 81 0 0 4 8 4.4 7 164 17 - 4 18 10 - 12 17 26 - 3 10 54 - 13 28 9 0.76 - 7 15 52 80 0 0 4 8 2.1 8 165 16 - 3 43 14 - 10 52 26 - 2 42 47 - 11 55 28 0.77 - 6 31 50 79 0 0 4 7 59.4 9 166 16 - 3 18 55 - 9 47 50 - 2 24 0 - 10 44 46 0.77 - 5 59 10 78 0 0 4 7 56.5 10 166 15 - 3 2 31 - 8 58 18 - 2 12 12 - 9 50 15 0.77 - 5 35 12 77 0 0 4 7 53.2 11 167 15 - 2 52 13 - 8 20 14 - 2 5 45 - 9 8 3 0.78 - 5 18 1 76 0 0 4 7 49.6 12 167 14 - 2 46 40 - 7 51 7 - 2 3 30 - 8 35 25 0.78 - 5 6 16 75 0 0 4 7 45.7 13 167 13 - 2 44 56 - 7 29 6 - 2 4 36 - 8 10 24 0.78 - 4 58 54 74 0 0 4 7 41.5 14 167 13 - 2 46 17 - 7 12 50 - 2 8 26 - 7 51 32 0.78 - 4 55 9 73 0 0 4 7 37.0 15 167 12 - 2 50 11 - 7 1 16 - 2 14 30 - 7 37 43 0.78 - 4 54 25 72 0 0 4 7 32.1 16 167 12 - 2 56 13 - 6 53 39 - 2 22 28 - 7 28 5 0.78 - 4 56 13 71 0 0 4 7 27.0 17 167 11 - 3 4 3 - 6 49 20 - 2 32 0 - 7 21 59 -0.78 - 5 0 11 70 0 0 4 7 21.6 18 167 10 - 3 13 25 - 6 47 49 - 2 42 54 - 7 18 53 -0.78 - 5 6 1 69 0 0 4 7 15.9 19 167 10 - 3 24 6 - 6 48 43 - 2 54 58 - 7 18 21 -0.78 - 5 13 27 68 0 0 4 7 9.8 19 166 9 - 3 35 56 - 6 51 42 - 3 8 4 - 7 20 3 -0.78 - 5 22 18 67 0 0 4 7 3.5 20 166 8 - 3 48 46 - 6 56 31 - 3 22 2 - 7 23 41 -0.78 - 5 32 24 66 0 0 4 6 56.9 21 166 8 - 4 2 30 - 7 2 55 - 3 36 49 - 7 29 2 -0.78 - 5 43 36 65 0 0 4 6 50.0 22 166 7 - 4 17 3 - 7 10 46 - 3 52 18 - 7 35 54 -0.78 - 5 55 48 64 0 0 4 6 42.8 23 165 6 - 4 32 18 - 7 19 52 - 4 8 26 - 7 44 7 -0.78 - 6 8 53 63 0 0 4 6 35.3 24 165 5 - 4 48 12 - 7 30 7 - 4 25 8 - 7 53 32 -0.78 - 6 22 47 62 0 0 4 6 27.5 25 164 5 - 5 4 42 - 7 41 24 - 4 42 22 - 8 4 4 -0.78 - 6 37 26 61 0 0 4 6 19.4 26 164 4 - 5 21 44 - 7 53 37 - 5 0 6 - 8 15 35 -0.78 - 6 52 46 60 0 0 4 6 11.1 27 163 3 - 5 39 17 - 8 6 42 - 5 18 17 - 8 28 1 -0.78 - 7 8 43 59 0 0 4 6 2.5 28 163 2 - 5 57 19 - 8 20 35 - 5 36 54 - 8 41 18 -0.78 - 7 25 16 58 0 0 4 5 53.6 29 162 2 - 6 15 47 - 8 35 12 - 5 55 55 - 8 55 21 -0.78 - 7 42 22 57 0 0 4 5 44.4 30 162 1 - 6 34 41 - 8 50 29 - 6 15 19 - 9 10 7 -0.78 - 8 0 0 56 0 0 4 5 34.9 31 161 0 - 6 53 58 - 9 6 26 - 6 35 6 - 9 25 35 -0.78 - 8 18 7 55 0 0 4 5 25.2 32 161 -1 - 7 13 39 - 9 22 59 - 6 55 13 - 9 41 41 -0.78 - 8 36 42 54 0 0 4 5 15.3 32 160 -2 - 7 33 42 - 9 40 6 - 7 15 41 - 9 58 23 -0.79 - 8 55 45 53 0 0 4 5 5.0 33 160 -3 - 7 54 7 - 9 57 47 - 7 36 30 - 10 15 39 -0.79 - 9 15 15 52 0 0 4 4 54.5 34 159 -3 - 8 14 53 - 10 15 59 - 7 57 38 - 10 33 29 -0.79 - 9 35 10 51 0 0 4 4 43.8 35 158 -4 - 8 36 0 - 10 34 42 - 8 19 5 - 10 51 51 -0.79 - 9 55 30 50 0 0 4 4 32.8 36 157 -5 - 8 57 27 - 10 53 54 - 8 40 52 - 11 10 44 -0.79 - 10 16 14 49 0 0 4 4 21.5 37 157 -6 - 9 19 15 - 11 13 35 - 9 2 58 - 11 30 7 -0.79 - 10 37 23 48 0 0 4 4 10.0 37 156 -7 - 9 41 23 - 11 33 44 - 9 25 23 - 11 49 59 -0.79 - 10 58 56 47 0 0 4 3 58.3 38 155 -8 - 10 3 52 - 11 54 21 - 9 48 8 - 12 10 20 -0.79 - 11 20 53 46 0 0 4 3 46.3 39 154 -9 - 10 26 41 - 12 15 25 - 10 11 12 - 12 31 9 -0.79 - 11 43 13 45 0 0 4 3 34.1 40 153 -10 - 10 49 51 - 12 36 57 - 10 34 35 - 12 52 26 -0.79 - 12 5 58 44 0 0 4 3 21.6 41 152 -11 - 11 13 21 - 12 58 55 - 10 58 19 - 13 14 11 -0.79 - 12 29 7 43 0 0 4 3 9.0 41 151 -12 - 11 37 13 - 13 21 21 - 11 22 23 - 13 36 24 -0.79 - 12 52 40 42 0 0 4 2 56.1 42 150 -13 - 12 1 26 - 13 44 14 - 11 46 48 - 13 59 5 -0.79 - 13 16 37 41 0 0 4 2 43.0 43 149 -14 - 12 26 2 - 14 7 34 - 12 11 34 - 14 22 15 -0.79 - 13 41 0 40 0 0 4 2 29.6 43 148 -15 - 12 51 0 - 14 31 21 - 12 36 42 - 14 45 52 -0.79 - 14 5 48 39 0 0 4 2 16.1 44 147 -15 - 13 16 20 - 14 55 36 - 13 2 12 - 15 9 58 -0.80 - 14 31 2 38 0 0 4 2 2.3 45 146 -16 - 13 42 5 - 15 20 20 - 13 28 6 - 15 34 33 -0.80 - 14 56 43 37 0 0 4 1 48.4 45 145 -17 - 14 8 14 - 15 45 33 - 13 54 23 - 15 59 38 -0.80 - 15 22 51 36 0 0 4 1 34.2 46 144 -18 - 14 34 49 - 16 11 15 - 14 21 5 - 16 25 12 -0.80 - 15 49 28 35 0 0 4 1 19.8 46 143 -19 - 15 1 49 - 16 37 27 - 14 48 12 - 16 51 18 -0.80 - 16 16 33 34 0 0 4 1 5.3 47 141 -21 - 15 29 16 - 17 4 11 - 15 15 46 - 17 17 55 -0.80 - 16 44 8 33 0 0 4 0 50.6 47 140 -22 - 15 57 11 - 17 31 26 - 15 43 46 - 17 45 4 -0.80 - 17 12 14 32 0 0 4 0 35.7 48 139 -23 - 16 25 35 - 17 59 13 - 16 12 16 - 18 12 47 -0.81 - 17 40 51 31 0 0 4 0 20.6 48 137 -24 - 16 54 29 - 18 27 35 - 16 41 14 - 18 41 4 -0.81 - 18 10 2 30 0 0 4 0 5.3 49 136 -25 - 17 23 54 - 18 56 31 - 17 10 43 - 19 9 56 -0.81 - 18 39 46 29 0 0 3 59 49.8 49 134 -26 - 17 53 51 - 19 26 4 - 17 40 44 - 19 39 25 -0.81 - 19 10 6 28 0 0 3 59 34.2 49 133 -27 - 18 24 22 - 19 56 13 - 18 11 18 - 20 9 32 -0.81 - 19 41 3 27 0 0 3 59 18.5 50 131 -28 - 18 55 28 - 20 27 2 - 18 42 27 - 20 40 18 -0.81 - 20 12 38 26 0 0 3 59 2.5 50 130 -29 - 19 27 10 - 20 58 30 - 19 14 11 - 21 11 44 -0.82 - 20 44 54 25 0 0 3 58 46.5 50 128 -30 - 19 59 31 - 21 30 41 - 19 46 34 - 21 43 54 -0.82 - 21 17 51 24 0 0 3 58 30.2 50 126 -31 - 20 32 31 - 22 3 35 - 20 19 35 - 22 16 47 -0.82 - 21 51 32 23 0 0 3 58 13.9 50 125 -32 - 21 6 14 - 22 37 15 - 20 53 18 - 22 50 27 -0.82 - 22 25 58 22 0 0 3 57 57.4 50 123 -34 - 21 40 40 - 23 11 42 - 21 27 45 - 23 24 54 -0.82 - 23 1 13 21 0 0 3 57 40.7 50 121 -35 - 22 15 52 - 23 46 59 - 22 2 56 - 24 0 13 -0.82 - 23 37 17 20 0 0 3 57 24.0 50 120 -36 - 22 51 52 - 24 23 9 - 22 38 55 - 24 36 23 -0.83 - 24 14 14 19 0 0 3 57 7.1 50 118 -37 - 23 28 43 - 25 0 13 - 23 15 44 - 25 13 30 -0.83 - 24 52 7 18 0 0 3 56 50.0 50 116 -38 - 24 6 27 - 25 38 15 - 23 53 26 - 25 51 34 -0.83 - 25 30 57 17 0 0 3 56 32.9 50 115 -39 - 24 45 7 - 26 17 17 - 24 32 4 - 26 30 40 -0.83 - 26 10 50 16 0 0 3 56 15.7 50 113 -41 - 25 24 47 - 26 57 23 - 25 11 40 - 27 10 51 -0.83 - 26 51 47 15 0 0 3 55 58.3 49 112 -42 - 26 5 29 - 27 38 37 - 25 52 17 - 27 52 10 -0.84 - 27 33 53 14 0 0 3 55 40.9 49 110 -43 - 26 47 17 - 28 21 3 - 26 34 0 - 28 34 41 -0.84 - 28 17 12 13 0 0 3 55 23.3 49 108 -44 - 27 30 15 - 29 4 44 - 27 16 53 - 29 18 29 -0.84 - 29 1 48 12 0 0 3 55 5.7 48 107 -46 - 28 14 27 - 29 49 45 - 28 0 59 - 30 3 38 -0.84 - 29 47 46 11 0 0 3 54 47.9 48 105 -47 - 28 59 59 - 30 36 12 - 28 46 23 - 30 50 13 -0.85 - 30 35 12 10 0 0 3 54 30.1 47 104 -48 - 29 46 54 - 31 24 10 - 29 33 10 - 31 38 21 -0.85 - 31 24 11 9 0 0 3 54 12.2 47 103 -50 - 30 35 19 - 32 13 46 - 30 21 25 - 32 28 8 -0.85 - 32 14 51 8 0 0 3 53 54.2 46 101 -51 - 31 25 21 - 33 5 6 - 31 11 16 - 33 19 40 -0.85 - 33 7 18 7 0 0 3 53 36.2 45 100 -52 - 32 17 5 - 33 58 19 - 32 2 49 - 34 13 7 -0.85 - 34 1 41 6 0 0 3 53 18.1 44 99 -54 - 33 10 40 - 34 53 34 - 32 56 11 - 35 8 37 -0.86 - 34 58 10 5 0 0 3 52 59.9 43 98 -55 - 34 6 15 - 35 51 0 - 33 51 31 - 36 6 20 -0.86 - 35 56 55 4 0 0 3 52 41.6 43 96 -57 - 35 4 0 - 36 50 49 - 34 48 59 - 37 6 29 -0.86 - 36 58 8 3 0 0 3 52 23.3 42 95 -58 - 36 4 6 - 37 53 15 - 35 48 47 - 38 9 16 -0.86 - 38 2 4 2 0 0 3 52 5.0 41 94 -59 - 37 6 46 - 38 58 32 - 36 51 6 - 39 14 58 -0.86 - 39 8 58 1 0 0 3 51 46.6 39 93 -61 - 38 12 14 - 40 6 59 - 37 56 11 - 40 23 53 -0.87 - 40 19 10 0 0 0 3 51 28.1 38 93 -62 - 39 20 49 - 41 18 57 - 39 4 19 - 41 36 23 -0.87 - 41 33 4 - 1 0 0 3 51 9.6 37 92 -64 - 40 32 52 - 42 34 51 - 40 15 51 - 42 52 54 -0.87 Latitude Latitude Latitude Latitude - 42 0 0 - 1 21 6 3 51 3.1 36 92 -65 - 2 8 37 - 0 32 52 - 2 22 7 - 0 18 53 -0.86 - 43 0 0 - 2 6 38 3 50 49.0 35 91 -66 - 2 53 26 - 1 19 9 - 3 6 44 - 1 5 24 -0.87 - 44 0 0 - 2 50 13 3 50 35.5 34 91 -67 - 3 36 20 - 2 3 28 - 3 49 27 - 1 49 55 -0.87 - 45 0 0 - 3 31 55 3 50 22.5 33 90 -68 - 4 17 23 - 2 45 50 - 4 30 19 - 2 32 29 -0.87 - 46 0 0 - 4 11 47 3 50 10.1 32 90 -69 - 4 56 38 - 3 26 19 - 5 9 24 - 3 13 10 -0.87 - 47 0 0 - 4 49 52 3 49 58.3 31 89 -70 - 5 34 9 - 4 5 1 - 5 46 45 - 3 52 1 -0.87 - 48 0 0 - 5 26 14 3 49 46.9 30 89 -71 - 6 9 58 - 4 41 56 - 6 22 25 - 4 29 7 -0.87 - 49 0 0 - 6 0 55 3 49 36.0 29 89 -72 - 6 44 8 - 5 17 9 - 6 56 26 - 5 4 29 -0.87 - 50 0 0 - 6 33 57 3 49 25.7 28 89 -73 - 7 16 42 - 5 50 42 - 7 28 52 - 5 38 11 -0.87 - 51 0 0 - 7 5 25 3 49 15.8 27 89 -74 - 7 47 42 - 6 22 38 - 7 59 45 - 6 10 15 -0.87 - 52 0 0 - 7 35 20 3 49 6.4 26 89 -75 - 8 17 11 - 6 52 59 - 8 29 7 - 6 40 44 -0.87 - 53 0 0 - 8 3 44 3 48 57.4 25 89 -75 - 8 45 11 - 7 21 48 - 8 57 0 - 7 9 41 -0.87 - 54 0 0 - 8 30 40 3 48 48.8 24 88 -76 - 9 11 44 - 7 49 8 - 9 23 26 - 7 37 8 -0.87 - 55 0 0 - 8 56 10 3 48 40.7 23 88 -76 - 9 36 53 - 8 15 0 - 9 48 29 - 8 3 6 -0.87 - 56 0 0 - 9 20 16 3 48 33.0 22 88 -77 -10 0 38 - 8 39 27 -10 12 9 - 8 27 39 -0.87 - 57 0 0 - 9 42 59 3 48 25.8 21 88 -77 -10 23 3 - 9 2 30 -10 34 28 - 8 50 48 -0.87 - 58 0 0 -10 4 22 3 48 18.9 20 89 -77 -10 44 8 - 9 24 12 -10 55 28 - 9 12 35 -0.87 - 59 0 0 -10 24 26 3 48 12.4 19 89 -77 -11 3 55 - 9 44 33 -11 15 11 - 9 33 1 -0.87 - 60 0 0 -10 43 13 3 48 6.3 18 89 -77 -11 22 26 -10 3 36 -11 33 38 - 9 52 9 -0.87 - 61 0 0 -11 0 44 3 48 0.5 17 89 -77 -11 39 43 -10 21 21 -11 50 50 -10 9 59 -0.87 - 62 0 0 -11 17 0 3 47 55.2 16 89 -77 -11 55 45 -10 37 52 -12 6 49 -10 26 33 -0.87 - 63 0 0 -11 32 3 3 47 50.2 15 89 -77 -12 10 36 -10 53 7 -12 21 35 -10 41 53 -0.87 - 64 0 0 -11 45 54 3 47 45.5 14 89 -77 -12 24 15 -11 7 10 -12 35 11 -10 55 59 -0.88 - 65 0 0 -11 58 33 3 47 41.2 13 89 -76 -12 36 44 -11 20 1 -12 47 37 -11 8 53 -0.88 - 66 0 0 -12 10 3 3 47 37.2 12 90 -76 -12 48 4 -11 31 40 -12 58 55 -11 20 35 -0.88 - 67 0 0 -12 20 24 3 47 33.6 11 90 -75 -12 58 16 -11 42 10 -13 9 4 -11 31 8 -0.88 - 68 0 0 -12 29 36 3 47 30.3 10 90 -74 -13 7 20 -11 51 31 -13 18 6 -11 40 31 -0.88 - 69 0 0 -12 37 41 3 47 27.3 9 90 -74 -13 15 18 -11 59 43 -13 26 2 -11 48 45 -0.89 - 70 0 0 -12 44 39 3 47 24.7 8 90 -73 -13 22 9 -12 6 48 -13 32 52 -11 55 52 -0.89 - 71 0 0 -12 50 31 3 47 22.4 7 91 -72 -13 27 56 -12 12 45 -13 38 37 -12 1 51 -0.90 - 72 0 0 -12 55 18 3 47 20.3 6 91 -72 -13 32 38 -12 17 37 -13 43 17 -12 6 44 -0.90 - 73 0 0 -12 58 59 3 47 18.7 5 91 -71 -13 36 15 -12 21 23 -13 46 53 -12 10 31 -0.92 - 74 0 0 -13 1 36 3 47 17.3 4 91 -70 -13 38 49 -12 24 3 -13 49 26 -12 13 12 -0.93 - 75 0 0 -13 3 9 3 47 16.2 3 91 -69 -13 40 19 -12 25 38 -13 50 56 -12 14 49 -0.97 - 76 0 0 -13 3 38 3 47 15.4 2 92 -68 -13 40 46 -12 26 9 -13 51 22 -12 15 20 -1.03 - 77 0 0 -13 3 3 3 47 15.0 1 92 -67 -13 40 10 -12 25 36 -13 50 46 -12 14 47 -1.24 Uncertainty in time = +/- 6 secs Prediction of 2023 May 14.2 Data for the target star ------------------------ * name: HIP 116732 * constellation : Pisces * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 23 39 23.3785 DE: -02 09 16.532 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 23 39 23.3786 DE: -02 09 16.531 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 8.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (545) Messalina asteroid class: approx. diameter [km]: 106 approx. diameter ["]: 0.068 distance from Earth [AU]: 2.16840 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#67 date of fit: 2023 Apr 27 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): 0.030", 0.004", 55.28° remarks: * orbital elements for (545)Messalina : Mean anomaly = 20.4912124741 deg Arg. of pericenter = 331.3482516882 deg Long. of node = 333.5944404423 deg Inclination = 11.2058574214 deg Eccentricity = 0.1699199672 Semimajor axis = 3.1999087758 AU Perihelion dist = 2.6561803816 AU Mag: H = 8.87, G = 0.15 Epoch of elements : MJD 60133.16520833 TDT (2023 Jul 08.1652) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#672023Apr27,13.61,2023,7,8,3.962405,-0.504326,0.387421,2.686185,3.494754,-0.004727,-0.002041,0.000000,0.000000 9.8592,-2.0244,121.83,22.51,False HIP 116732,23.65649401,-2.1545923,0.00,8.16,0.00,0.0,0,,23.67660496,-2.0244168,5.58,0.00,0,0,0 545,Messalina,13.74,106.3,2.1684,0,0,0.726,14.17,,6.0,0 0,20.4628,2023,7,8,331.3483,333.5944,11.2059,0.16992,3.19991,2.65618,8.88,5.0,0.15 1.144,0.0297,0.0037,55,0.0097,Known errors,-1.00,-1,-1,-1 20230708_116732,60078.17 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 May 14, 03:59 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org