IOTA/IOTA-ES occultation update for (952) Caia / UCAC4 321-228097 event on 2024 Oct 26, 15:02 UT Visible from Summary ------- On 2024 Oct 26 UT, the 88.242 km diameter asteroid (952) Caia will occult a 11.4 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.69 mag to 14.00 mag (the magnitude of the asteroid) for at most 5.360 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 Oct 26, 14:57 - 2024 Oct 26, 15:08 * geocentric midpoint of event [JD]: 2460610.12689633 * magnitude of target star: 11.40 * magnitude drop [mag]: 2.69 * estimated maximum duration [s]: 5.360 * Moon: 29 % sunlit, 160° distance * Sun: 95° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 103 * 1 sigma uncertainty interval [path widths]: +/- 0.09 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.001", 70°) * approx speed of asteroid's shadow [km/s]: 16.4650 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 321-228097 by 952 Caia on 2024 Oct 26 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 - 38 0 0 .. .. .... .. .. .. .. .. .. - 4 31 7 .. .. .. - 4 36 46 .. .. .. .... - 37 0 0 - 4 29 6 14 57 13.2 1 116 76 - 4 59 49 - 3 58 11 - 5 5 26 - 3 52 30 .... - 36 0 0 - 4 57 1 14 57 13.4 2 116 76 - 5 27 33 - 4 26 17 - 5 33 8 - 4 20 38 -0.37 - 35 0 0 - 5 23 58 14 57 13.8 3 116 75 - 5 54 21 - 4 53 25 - 5 59 54 - 4 47 48 -0.45 - 34 0 0 - 5 49 58 14 57 14.4 4 116 74 - 6 20 11 - 5 19 36 - 6 25 42 - 5 14 0 -0.49 - 33 0 0 - 6 15 2 14 57 15.1 5 115 74 - 6 45 4 - 5 44 49 - 6 50 34 - 5 39 15 -0.51 - 32 0 0 - 6 39 8 14 57 16.0 6 115 73 - 7 9 2 - 6 9 5 - 7 14 30 - 6 3 33 -0.53 - 31 0 0 - 7 2 19 14 57 17.0 7 115 72 - 7 32 3 - 6 32 24 - 7 37 29 - 6 26 54 -0.54 - 30 0 0 - 7 24 33 14 57 18.2 9 115 71 - 7 54 9 - 6 54 47 - 7 59 34 - 6 49 18 -0.55 - 29 0 0 - 7 45 52 14 57 19.5 10 115 70 - 8 15 20 - 7 16 14 - 8 20 43 - 7 10 47 -0.56 - 28 0 0 - 8 6 15 14 57 21.0 11 115 69 - 8 35 35 - 7 36 45 - 8 40 57 - 7 31 19 -0.56 - 27 0 0 - 8 25 43 14 57 22.6 12 115 69 - 8 54 56 - 7 56 21 - 9 0 17 - 7 50 57 -0.57 - 26 0 0 - 8 44 17 14 57 24.3 13 115 68 - 9 13 23 - 8 15 2 - 9 18 42 - 8 9 39 -0.57 - 25 0 0 - 9 1 57 14 57 26.2 14 115 67 - 9 30 55 - 8 32 48 - 9 36 14 - 8 27 27 -0.57 - 24 0 0 - 9 18 42 14 57 28.2 15 114 66 - 9 47 34 - 8 49 40 - 9 52 51 - 8 44 20 -0.58 - 23 0 0 - 9 34 33 14 57 30.4 16 114 65 -10 3 20 - 9 5 38 -10 8 36 - 9 0 18 -0.58 - 22 0 0 - 9 49 32 14 57 32.7 17 114 64 -10 18 12 - 9 20 42 -10 23 27 - 9 15 23 -0.58 - 21 0 0 -10 3 37 14 57 35.1 18 114 63 -10 32 12 - 9 34 52 -10 37 26 - 9 29 35 -0.58 - 20 0 0 -10 16 49 14 57 37.6 19 114 62 -10 45 19 - 9 48 9 -10 50 32 - 9 42 53 -0.59 - 19 0 0 -10 29 8 14 57 40.3 20 114 61 -10 57 34 -10 0 33 -11 2 46 - 9 55 18 -0.59 - 18 0 0 -10 40 34 14 57 43.0 21 114 60 -11 8 56 -10 12 4 -11 14 7 -10 6 49 -0.59 - 17 0 0 -10 51 9 14 57 45.9 22 114 59 -11 19 27 -10 22 43 -11 24 37 -10 17 29 -0.59 - 16 0 0 -11 0 51 14 57 49.0 23 114 58 -11 29 5 -10 32 29 -11 34 15 -10 27 15 -0.59 - 15 0 0 -11 9 42 14 57 52.1 24 114 57 -11 37 53 -10 41 22 -11 43 2 -10 36 10 -0.59 - 14 0 0 -11 17 40 14 57 55.4 25 113 56 -11 45 48 -10 49 24 -11 50 57 -10 44 12 -0.59 - 13 0 0 -11 24 47 14 57 58.7 26 113 55 -11 52 53 -10 56 34 -11 58 1 -10 51 22 -0.60 - 12 0 0 -11 31 3 14 58 2.2 27 113 54 -11 59 6 -11 2 51 -12 4 14 -10 57 40 -0.60 - 11 0 0 -11 36 27 14 58 5.8 28 113 53 -12 4 28 -11 8 17 -12 9 35 -11 3 6 -0.60 - 10 0 0 -11 40 59 14 58 9.5 28 113 52 -12 8 59 -11 12 51 -12 14 6 -11 7 41 -0.60 - 9 0 0 -11 44 41 14 58 13.4 29 113 51 -12 12 39 -11 16 34 -12 17 46 -11 11 24 -0.60 - 8 0 0 -11 47 31 14 58 17.3 30 113 50 -12 15 28 -11 19 25 -12 20 35 -11 14 15 -0.60 - 7 0 0 -11 49 30 14 58 21.3 31 113 49 -12 17 27 -11 21 24 -12 22 33 -11 16 14 -0.60 - 6 0 0 -11 50 37 14 58 25.5 32 113 48 -12 18 34 -11 22 32 -12 23 41 -11 17 22 -0.60 - 5 0 0 -11 50 53 14 58 29.7 33 113 47 -12 18 50 -11 22 48 -12 23 57 -11 17 38 -0.60 - 4 0 0 -11 50 18 14 58 34.1 34 113 46 -12 18 15 -11 22 12 -12 23 22 -11 17 2 -0.60 - 3 0 0 -11 48 51 14 58 38.6 35 113 45 -12 16 49 -11 20 44 -12 21 56 -11 15 34 -0.60 - 2 0 0 -11 46 33 14 58 43.2 36 114 44 -12 14 32 -11 18 25 -12 19 39 -11 13 14 -0.61 - 1 0 0 -11 43 23 14 58 47.9 37 114 43 -12 11 24 -11 15 13 -12 16 31 -11 10 2 -0.61 0 0 0 -11 39 21 14 58 52.6 38 114 42 -12 7 24 -11 11 9 -12 12 32 -11 5 58 -0.61 1 0 0 -11 34 27 14 58 57.5 38 114 41 -12 2 32 -11 6 13 -12 7 40 -11 1 1 -0.61 2 0 0 -11 28 40 14 59 2.5 39 114 40 -11 56 48 -11 0 24 -12 1 57 -10 55 12 -0.61 3 0 0 -11 22 2 14 59 7.7 40 114 39 -11 50 13 -10 53 42 -11 55 22 -10 48 30 -0.61 4 0 0 -11 14 30 14 59 12.9 41 115 38 -11 42 44 -10 46 8 -11 47 54 -10 40 54 -0.61 5 0 0 -11 6 6 14 59 18.2 42 115 37 -11 34 24 -10 37 39 -11 39 34 -10 32 25 -0.61 6 0 0 -10 56 48 14 59 23.6 43 115 36 -11 25 10 -10 28 18 -11 30 21 -10 23 3 -0.61 7 0 0 -10 46 37 14 59 29.1 44 116 35 -11 15 3 -10 18 2 -11 20 15 -10 12 46 -0.61 8 0 0 -10 35 32 14 59 34.8 44 116 34 -11 4 3 -10 6 52 -11 9 16 -10 1 35 -0.61 9 0 0 -10 23 32 14 59 40.5 45 116 33 -10 52 9 - 9 54 47 -10 57 23 - 9 49 30 -0.61 10 0 0 -10 10 38 14 59 46.3 46 117 32 -10 39 20 - 9 41 47 -10 44 35 - 9 36 29 -0.61 11 0 0 - 9 56 49 14 59 52.3 47 117 31 -10 25 37 - 9 27 52 -10 30 53 - 9 22 32 -0.61 12 0 0 - 9 42 4 14 59 58.3 48 118 30 -10 10 59 - 9 13 1 -10 16 16 - 9 7 40 -0.61 13 0 0 - 9 26 24 15 0 4.5 48 119 29 - 9 55 25 - 8 57 14 -10 0 43 - 8 51 52 -0.61 14 0 0 - 9 9 47 15 0 10.7 49 119 28 - 9 38 55 - 8 40 29 - 9 44 14 - 8 35 6 -0.61 15 0 0 - 8 52 13 15 0 17.1 50 120 27 - 9 21 28 - 8 22 48 - 9 26 49 - 8 17 23 -0.61 16 0 0 - 8 33 42 15 0 23.5 51 121 26 - 9 3 5 - 8 4 9 - 9 8 28 - 7 58 42 -0.61 17 0 0 - 8 14 13 15 0 30.1 51 122 25 - 8 43 44 - 7 44 31 - 8 49 8 - 7 39 3 -0.61 18 0 0 - 7 53 45 15 0 36.8 52 123 24 - 8 23 26 - 7 23 55 - 8 28 51 - 7 18 25 -0.61 19 0 0 - 7 32 19 15 0 43.5 53 124 23 - 8 2 8 - 7 2 19 - 8 7 36 - 6 56 48 -0.61 20 0 0 - 7 9 53 15 0 50.4 53 125 22 - 7 39 52 - 6 39 44 - 7 45 21 - 6 34 11 -0.61 21 0 0 - 6 46 27 15 0 57.4 54 126 21 - 7 16 36 - 6 16 8 - 7 22 7 - 6 10 33 -0.61 22 0 0 - 6 22 1 15 1 4.4 54 127 20 - 6 52 20 - 5 51 31 - 6 57 53 - 5 45 54 -0.61 23 0 0 - 5 56 34 15 1 11.6 55 128 18 - 6 27 4 - 5 25 52 - 6 32 38 - 5 20 13 -0.61 24 0 0 - 5 30 4 15 1 18.9 56 129 17 - 6 0 46 - 4 59 12 - 6 6 23 - 4 53 31 -0.61 25 0 0 - 5 2 33 15 1 26.2 56 131 16 - 5 33 26 - 4 31 29 - 5 39 5 - 4 25 45 -0.61 26 0 0 - 4 33 59 15 1 33.7 57 132 15 - 5 5 4 - 4 2 42 - 5 10 45 - 3 56 56 -0.61 27 0 0 - 4 4 22 15 1 41.2 57 134 14 - 4 35 40 - 3 32 52 - 4 41 23 - 3 27 4 -0.61 28 0 0 - 3 33 40 15 1 48.9 57 135 13 - 4 5 11 - 3 1 57 - 4 10 57 - 2 56 7 -0.61 29 0 0 - 3 1 55 15 1 56.6 58 137 12 - 3 33 39 - 2 29 58 - 3 39 27 - 2 24 5 -0.61 30 0 0 - 2 29 4 15 2 4.4 58 139 11 - 3 1 3 - 1 56 53 - 3 6 53 - 1 50 57 -0.61 31 0 0 - 1 55 8 15 2 12.3 58 141 10 - 2 27 21 - 1 22 42 - 2 33 14 - 1 16 44 -0.61 32 0 0 - 1 20 6 15 2 20.3 58 143 8 - 1 52 34 - 0 47 25 - 1 58 30 - 0 41 24 -0.61 33 0 0 - 0 43 58 15 2 28.3 58 144 7 - 1 16 41 - 0 11 1 - 1 22 40 - 0 4 57 -0.61 34 0 0 - 0 6 43 15 2 36.5 59 146 6 - 0 39 42 0 26 30 - 0 45 44 0 32 37 -0.61 35 0 0 0 31 38 15 2 44.7 59 148 5 - 0 1 37 1 5 8 - 0 7 41 1 11 18 -0.61 36 0 0 1 11 7 15 2 53.0 59 150 4 0 37 35 1 44 54 0 31 28 1 51 7 -0.61 37 0 0 1 51 44 15 3 1.3 58 152 3 1 17 55 2 25 48 1 11 44 2 32 4 -0.61 38 0 0 2 33 28 15 3 9.7 58 154 2 1 59 21 3 7 50 1 53 7 3 14 9 -0.61 39 0 0 3 16 19 15 3 18.1 58 157 0 2 41 55 3 50 59 2 35 37 3 57 23 -0.61 40 0 0 4 0 18 15 3 26.6 58 159 -1 3 25 35 4 35 18 3 19 15 4 41 44 -0.61 41 0 0 4 45 25 15 3 35.1 57 161 -2 4 10 23 5 20 44 4 3 59 5 27 14 -0.61 42 0 0 5 31 39 15 3 43.7 57 163 -3 4 56 18 6 7 17 4 49 51 6 13 52 -0.61 43 0 0 6 19 0 15 3 52.3 57 165 -4 5 43 19 6 54 59 5 36 48 7 1 37 -0.61 44 0 0 7 7 28 15 4 0.9 56 166 -5 6 31 27 7 43 47 6 24 52 7 50 28 -0.61 45 0 0 7 57 1 15 4 9.5 56 168 -7 7 20 40 8 33 41 7 14 1 8 40 27 -0.61 46 0 0 8 47 40 15 4 18.1 55 170 -8 8 10 57 9 24 41 8 4 15 9 31 31 -0.61 47 0 0 9 39 23 15 4 26.7 54 172 -9 9 2 19 10 16 46 8 55 34 10 23 39 -0.61 48 0 0 10 32 9 15 4 35.3 53 174 -10 9 54 44 11 9 54 9 47 55 11 16 52 -0.60 49 0 0 11 25 58 15 4 43.9 53 175 -11 10 48 11 12 4 5 10 41 18 12 11 7 -0.60 50 0 0 12 20 48 15 4 52.4 52 177 -12 11 42 39 12 59 17 11 35 41 13 6 23 -0.60 51 0 0 13 16 36 15 5 0.9 51 178 -14 12 38 5 13 55 29 12 31 4 14 2 39 -0.60 52 0 0 14 13 22 15 5 9.3 50 180 -15 13 34 29 14 52 38 13 27 24 14 59 52 -0.60 53 0 0 15 11 4 15 5 17.6 49 181 -16 14 31 48 15 50 43 14 24 39 15 58 1 -0.60 54 0 0 16 9 39 15 5 25.8 48 183 -17 15 30 1 16 49 41 15 22 47 16 57 4 -0.60 55 0 0 17 9 6 15 5 34.0 47 184 -18 16 29 5 17 49 30 16 21 47 17 56 58 -0.60 56 0 0 18 9 20 15 5 42.1 46 185 -19 17 28 57 18 50 8 17 21 35 18 57 40 -0.60 57 0 0 19 10 21 15 5 50.0 45 186 -20 18 29 35 19 51 32 18 22 9 19 59 8 -0.60 58 0 0 20 12 4 15 5 57.8 44 188 -22 19 30 55 20 53 38 19 23 25 21 1 18 -0.60 59 0 0 21 14 26 15 6 5.4 42 189 -23 20 32 55 21 56 23 20 25 21 22 4 8 -0.60 60 0 0 22 17 24 15 6 12.9 41 190 -24 21 35 32 22 59 45 21 27 54 23 7 34 -0.60 61 0 0 23 20 55 15 6 20.2 40 191 -25 22 38 41 24 3 38 22 30 59 24 11 31 -0.60 62 0 0 24 24 55 15 6 27.4 39 192 -26 23 42 19 25 7 59 23 34 34 25 15 56 -0.60 63 0 0 25 29 19 15 6 34.3 38 193 -27 24 46 22 26 12 44 24 38 33 26 20 46 -0.60 64 0 0 26 34 3 15 6 41.1 36 194 -28 25 50 46 27 17 50 25 42 53 27 25 55 -0.60 65 0 0 27 39 3 15 6 47.6 35 195 -28 26 55 27 28 23 11 26 47 30 28 31 20 -0.60 66 0 0 28 44 15 15 6 53.9 34 196 -29 28 0 20 29 28 42 27 52 20 29 36 55 -0.60 67 0 0 29 49 34 15 7 0.0 33 196 -30 29 5 21 30 34 20 28 57 17 30 42 36 -0.60 68 0 0 30 54 55 15 7 5.8 31 197 -31 30 10 25 31 39 59 30 2 18 31 48 19 -0.60 69 0 0 32 0 14 15 7 11.4 30 198 -32 31 15 27 32 45 36 31 7 17 32 53 59 -0.60 70 0 0 33 5 26 15 7 16.8 29 199 -33 32 20 23 33 51 4 32 12 11 33 59 30 -0.60 71 0 0 34 10 26 15 7 21.9 27 200 -33 33 25 9 34 56 19 33 16 54 35 4 47 -0.60 72 0 0 35 15 9 15 7 26.7 26 201 -34 34 29 38 36 1 15 34 21 21 36 9 47 -0.60 73 0 0 36 19 30 15 7 31.3 25 201 -35 35 33 47 37 5 49 35 25 27 37 14 23 -0.60 74 0 0 37 23 25 15 7 35.6 23 202 -35 36 37 31 38 9 56 36 29 10 38 18 32 -0.60 75 0 0 38 26 50 15 7 39.6 22 203 -36 37 40 46 39 13 31 37 32 23 39 22 9 -0.60 76 0 0 39 29 39 15 7 43.4 21 204 -36 38 43 27 40 16 29 38 35 2 40 25 8 -0.60 77 0 0 40 31 49 15 7 47.0 20 204 -37 39 45 30 41 18 45 39 37 4 41 27 26 -0.60 78 0 0 41 33 15 15 7 50.2 18 205 -37 40 46 50 42 20 17 40 38 24 42 29 0 -0.60 79 0 0 42 33 54 15 7 53.2 17 206 -38 41 47 25 43 21 0 41 38 57 43 29 43 -0.60 80 0 0 43 33 41 15 7 56.0 16 207 -38 42 47 10 44 20 51 42 38 42 44 29 34 -0.60 81 0 0 44 32 34 15 7 58.6 15 207 -38 43 46 2 45 19 45 43 37 33 45 28 28 -0.60 82 0 0 45 30 29 15 8 0.9 14 208 -39 44 43 57 46 17 39 44 35 29 46 26 23 -0.60 83 0 0 46 27 23 15 8 2.9 12 209 -39 45 40 53 47 14 32 45 32 26 47 23 15 -0.61 84 0 0 47 23 14 15 8 4.8 11 210 -39 46 36 48 48 10 19 46 28 20 48 19 2 -0.61 85 0 0 48 18 0 15 8 6.4 10 211 -39 47 31 38 49 5 0 47 23 11 49 13 41 -0.61 86 0 0 49 11 37 15 8 7.9 9 211 -39 48 25 21 49 58 31 48 16 56 50 7 11 -0.61 87 0 0 50 4 5 15 8 9.1 8 212 -39 49 17 57 50 50 51 49 9 33 50 59 30 -0.61 88 0 0 50 55 22 15 8 10.2 7 213 -39 50 9 23 51 41 59 50 1 1 51 50 36 -0.61 89 0 0 51 45 27 15 8 11.1 6 214 -40 50 59 38 52 31 53 50 51 18 52 40 29 -0.61 90 0 0 52 34 19 15 8 11.8 5 214 -40 51 48 42 53 20 34 51 40 24 53 29 7 -0.62 91 0 0 53 21 58 15 8 12.4 4 215 -40 52 36 33 54 7 59 52 28 17 54 16 30 -0.62 92 0 0 54 8 22 15 8 12.8 3 216 -39 53 23 11 54 54 9 53 14 58 55 2 37 -0.63 93 0 0 54 53 33 15 8 13.1 2 217 -39 54 8 36 55 39 4 54 0 25 55 47 29 -0.64 94 0 0 55 37 29 15 8 13.2 1 218 -39 54 52 48 56 22 44 54 44 40 56 31 6 -0.68 95 0 0 56 20 11 15 8 13.3 0 219 -39 55 35 47 .. .. .. 55 27 42 .. .. .. -16.18 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 321-228097 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 53 50.3186 DE: -25 56 43.929 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 53 50.3184 DE: -25 56 43.929 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.300) * V mag [mag]: 11.4 * B mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (952) Caia asteroid class: approx. diameter [km]: 88 approx. diameter ["]: 0.059 distance from Earth [AU]: 2.07430 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#63 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): 0.019", 0.001", 70.489° remarks: * orbital elements for (952)Caia : Mean anomaly = 334.2464038102 deg Arg. of pericenter = 356.8038082813 deg Long. of node = 18.3850005155 deg Inclination = 9.9921253128 deg Eccentricity = 0.2441903203 Semimajor axis = 2.9900503122 AU Perihelion dist = 2.2599089687 AU Mag: H = 9.40, G = 0.15 Epoch of elements : MJD 60609.62689604 TDT (2024 Oct 26.6269) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#632023Apr24,5.36,2024,10,26,15.045512,-0.305165,0.422435,7.530004,5.446564,0.005397,0.001643,0.000000,0.000000 52.6659,-25.8529,-49.71,-12.75,False UCAC4 321-228097,20.89731075,-25.9455356,11.72,11.40,11.23,0.0,0,,20.92180362,-25.8528978,2.69,2.44,0,0,0 952,Caia,14.00,88.242,2.0743,0,0,2.366,23.09,,4.4,0 0,334.1269,2024,10,26,356.8038,18.3850,9.9921,0.24419,2.99005,2.25991,9.39,5.0,0.15 1.092,0.0187,0.0012,70,0.0054,Known errors,1.57,0,-1,-1 20241026_228097,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:51 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org