IOTA/IOTA-ES occultation update for (234) Barbara / UCAC4 415-122294 event on 2023 Apr 06, 09:13 UT Visible from Canada Summary ------- On 2023 Apr 06 UT, the 45.9 km diameter asteroid (234) Barbara will occult a 13.9 mag star in the constellation Aquila for observers along a path across Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.56 mag to 13.43 mag (the magnitude of the asteroid) for at most 1.980 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 Apr 06, 09:11 - 2023 Apr 06, 09:14 * geocentric midpoint of event [JD]: 2460040.88404966 * magnitude of target star: 13.86 * magnitude drop [mag]: 0.56 * estimated maximum duration [s]: 1.980 * Moon: 100 % sunlit, 92° distance * Sun: 86° distance * rough path description: Canada The occultation path -------------------- * approximate projected width [km]: 123 * 1 sigma uncertainty interval [path widths]: +/- 0.15 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.003", 92°) * approx speed of asteroid's shadow [km/s]: 23.2109 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 415-122294 by 234 Barbara on 2023 Apr 6 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 -122 0 0 53 31 13 9 11 20.5 0 102 -29 52 57 16 54 6 4 52 47 24 54 16 32 .... -121 0 0 53 24 10 9 11 20.5 1 103 -29 52 50 18 53 58 56 52 40 27 54 9 23 -1.50 -120 0 0 53 17 35 9 11 20.7 2 104 -29 52 43 47 53 52 15 52 33 57 54 2 41 -1.91 -119 0 0 53 11 27 9 11 21.0 2 105 -29 52 37 43 53 46 3 52 27 54 53 56 28 -2.09 -118 0 0 53 5 47 9 11 21.3 3 105 -28 52 32 7 53 40 19 52 22 19 53 50 42 -2.19 -117 0 0 53 0 35 9 11 21.7 3 106 -28 52 26 58 53 35 4 52 17 11 53 45 26 -2.25 -116 0 0 52 55 51 9 11 22.2 4 107 -28 52 22 17 53 30 17 52 12 31 53 40 38 -2.30 -115 0 0 52 51 36 9 11 22.8 5 108 -28 52 18 4 53 25 58 52 8 19 53 36 18 -2.33 -114 0 0 52 47 48 9 11 23.4 5 109 -28 52 14 19 53 22 8 52 4 35 53 32 27 -2.35 -113 0 0 52 44 29 9 11 24.2 6 109 -27 52 11 3 53 18 47 52 1 19 53 29 6 -2.37 -112 0 0 52 41 39 9 11 25.0 6 110 -27 52 8 14 53 15 55 51 58 30 53 26 13 -2.39 -111 0 0 52 39 17 9 11 25.9 7 111 -27 52 5 53 53 13 32 51 56 10 53 23 49 -2.40 -110 0 0 52 37 24 9 11 26.9 7 112 -27 52 4 1 53 11 37 51 54 19 53 21 54 -2.41 -109 0 0 52 36 0 9 11 28.0 8 113 -26 52 2 38 53 10 12 51 52 55 53 20 29 -2.42 -108 0 0 52 35 4 9 11 29.1 9 113 -26 52 1 42 53 9 16 51 52 0 53 19 33 -2.43 -107 0 0 52 34 38 9 11 30.4 9 114 -26 52 1 16 53 8 50 51 51 34 53 19 6 -2.44 -106 0 0 52 34 40 9 11 31.7 10 115 -25 52 1 18 53 8 52 51 51 35 53 19 9 -2.44 -105 0 0 52 35 11 9 11 33.1 10 116 -25 52 1 49 53 9 24 51 52 6 53 19 41 -2.45 -104 0 0 52 36 12 9 11 34.5 11 117 -25 52 2 48 53 10 26 51 53 5 53 20 43 -2.46 -103 0 0 52 37 41 9 11 36.1 11 118 -24 52 4 16 53 11 56 51 54 33 53 22 14 -2.46 -102 0 0 52 39 39 9 11 37.7 12 119 -24 52 6 12 53 13 56 51 56 29 53 24 15 -2.46 -101 0 0 52 42 6 9 11 39.3 12 119 -23 52 8 38 53 16 26 51 58 53 53 26 44 -2.47 -100 0 0 52 45 2 9 11 41.1 13 120 -23 52 11 32 53 19 24 52 1 47 53 29 44 -2.47 - 99 0 0 52 48 27 9 11 42.9 13 121 -23 52 14 54 53 22 52 52 5 8 53 33 12 -2.48 - 98 0 0 52 52 21 9 11 44.8 14 122 -22 52 18 45 53 26 49 52 8 58 53 37 10 -2.48 - 97 0 0 52 56 44 9 11 46.7 14 123 -22 52 23 4 53 31 15 52 13 17 53 41 38 -2.48 - 96 0 0 53 1 35 9 11 48.7 15 124 -21 52 27 52 53 36 10 52 18 3 53 46 34 -2.49 - 95 0 0 53 6 55 9 11 50.8 15 125 -21 52 33 8 53 41 34 52 23 18 53 52 0 -2.49 - 94 0 0 53 12 43 9 11 52.9 16 126 -20 52 38 52 53 47 28 52 29 1 53 57 54 -2.49 - 93 0 0 53 19 0 9 11 55.1 16 127 -20 52 45 4 53 53 49 52 35 12 54 4 18 -2.49 - 92 0 0 53 25 45 9 11 57.4 17 128 -19 52 51 44 54 0 40 52 41 51 54 11 10 -2.50 - 91 0 0 53 32 59 9 11 59.7 17 129 -19 52 58 52 54 7 59 52 48 57 54 18 31 -2.50 - 90 0 0 53 40 40 9 12 2.0 17 129 -18 53 6 28 54 15 47 52 56 31 54 26 20 -2.50 - 89 0 0 53 48 49 9 12 4.5 18 130 -17 53 14 31 54 24 2 53 4 33 54 34 38 -2.50 - 88 0 0 53 57 26 9 12 6.9 18 131 -17 53 23 2 54 32 46 53 13 1 54 43 24 -2.50 - 87 0 0 54 6 31 9 12 9.4 18 132 -16 53 31 59 54 41 58 53 21 57 54 52 38 -2.51 - 86 0 0 54 16 2 9 12 11.9 19 133 -16 53 41 24 54 51 37 53 31 20 55 2 19 -2.51 - 85 0 0 54 26 1 9 12 14.5 19 134 -15 53 51 15 55 1 44 53 41 9 55 12 29 -2.51 - 84 0 0 54 36 27 9 12 17.2 19 135 -15 54 1 33 55 12 18 53 51 25 55 23 5 -2.51 - 83 0 0 54 47 19 9 12 19.8 20 136 -14 54 12 17 55 23 19 54 2 6 55 34 9 -2.51 - 82 0 0 54 58 37 9 12 22.5 20 137 -13 54 23 27 55 34 47 54 13 14 55 45 40 -2.51 - 81 0 0 55 10 22 9 12 25.2 20 138 -13 54 35 3 55 46 41 54 24 48 55 57 37 -2.51 - 80 0 0 55 22 32 9 12 28.0 20 140 -12 54 47 4 55 59 1 54 36 46 56 10 0 -2.52 - 79 0 0 55 35 8 9 12 30.8 21 141 -12 54 59 31 56 11 47 54 49 10 56 22 50 -2.52 - 78 0 0 55 48 9 9 12 33.6 21 142 -11 55 12 22 56 24 59 55 1 58 56 36 5 -2.52 - 77 0 0 56 1 35 9 12 36.4 21 143 -10 55 25 37 56 38 36 55 15 11 56 49 45 -2.52 - 76 0 0 56 15 25 9 12 39.3 21 144 -10 55 39 17 56 52 38 55 28 48 57 3 51 -2.52 - 75 0 0 56 29 40 9 12 42.1 21 145 -9 55 53 20 57 7 4 55 42 48 57 18 21 -2.52 - 74 0 0 56 44 18 9 12 45.0 21 146 -9 56 7 47 57 21 55 55 57 12 57 33 15 -2.52 - 73 0 0 56 59 19 9 12 47.9 21 147 -8 56 22 37 57 37 9 56 11 58 57 48 33 -2.52 - 72 0 0 57 14 43 9 12 50.8 21 148 -7 56 37 49 57 52 46 56 27 7 58 4 15 -2.52 - 71 0 0 57 30 30 9 12 53.7 22 149 -7 56 53 23 58 8 46 56 42 38 58 20 19 -2.52 - 70 0 0 57 46 38 9 12 56.6 22 150 -6 57 9 19 58 25 9 56 58 30 58 36 46 -2.52 - 69 0 0 58 3 8 9 12 59.5 22 151 -6 57 25 36 58 41 53 57 14 44 58 53 35 -2.53 - 68 0 0 58 19 59 9 13 2.4 22 152 -5 57 42 14 58 58 59 57 31 17 59 10 45 -2.53 - 67 0 0 58 37 11 9 13 5.3 22 154 -4 57 59 11 59 16 25 57 48 11 59 28 16 -2.53 - 66 0 0 58 54 42 9 13 8.1 22 155 -4 58 16 28 59 34 11 58 5 24 59 46 8 -2.53 - 65 0 0 59 12 32 9 13 11.0 21 156 -3 58 34 4 59 52 17 58 22 56 60 4 19 -2.53 - 64 0 0 59 30 41 9 13 13.9 21 157 -3 58 51 59 60 10 43 58 40 47 60 22 49 -2.53 - 63 0 0 59 49 8 9 13 16.7 21 158 -2 59 10 11 60 29 27 58 58 55 60 41 38 -2.53 - 62 0 0 60 7 53 9 13 19.5 21 159 -1 59 28 40 60 48 28 59 17 20 61 0 45 -2.53 - 61 0 0 60 26 54 9 13 22.3 21 160 -1 59 47 26 61 7 47 59 36 2 61 20 9 -2.53 - 60 0 0 60 46 12 9 13 25.1 21 161 0 60 6 28 61 27 22 59 54 59 61 39 50 -2.53 - 59 0 0 61 5 45 9 13 27.8 21 162 0 60 25 45 61 47 14 60 14 12 61 59 47 -2.53 - 58 0 0 61 25 33 9 13 30.6 21 163 1 60 45 17 62 7 20 60 33 39 62 19 59 -2.53 - 57 0 0 61 45 35 9 13 33.2 20 165 1 61 5 2 62 27 40 60 53 19 62 40 26 -2.53 - 56 0 0 62 5 50 9 13 35.9 20 166 2 61 25 0 62 48 14 61 13 13 63 1 6 -2.53 - 55 0 0 62 26 18 9 13 38.5 20 167 2 61 45 11 63 9 1 61 33 18 63 21 59 -2.53 - 54 0 0 62 46 57 9 13 41.1 20 168 3 62 5 33 63 30 0 61 53 36 63 43 3 -2.53 - 53 0 0 63 7 47 9 13 43.6 20 169 3 62 26 5 63 51 9 62 14 4 64 4 19 -2.54 - 52 0 0 63 28 47 9 13 46.1 19 170 4 62 46 48 64 12 29 62 34 41 64 25 46 -2.54 - 51 0 0 63 49 56 9 13 48.5 19 171 4 63 7 39 64 33 59 62 55 28 64 47 22 -2.54 - 50 0 0 64 11 14 9 13 50.9 19 172 5 63 28 39 64 55 36 63 16 22 65 9 6 -2.54 - 49 0 0 64 32 38 9 13 53.3 18 173 5 63 49 45 65 17 21 63 37 24 65 30 57 -2.54 - 48 0 0 64 54 10 9 13 55.6 18 174 6 64 10 58 65 39 13 63 58 32 65 52 56 -2.54 - 47 0 0 65 15 46 9 13 57.8 18 175 6 64 32 17 66 1 10 64 19 46 66 15 0 -2.54 - 46 0 0 65 37 28 9 14 0.0 17 176 7 64 53 40 66 23 12 64 41 4 66 37 8 -2.54 - 45 0 0 65 59 13 9 14 2.1 17 178 7 65 15 8 66 45 18 65 2 27 66 59 21 -2.54 - 44 0 0 66 21 1 9 14 4.2 17 179 7 65 36 38 67 7 27 65 23 52 67 21 36 -2.54 - 43 0 0 66 42 50 9 14 6.2 16 180 8 65 58 10 67 29 37 65 45 19 67 43 53 -2.54 - 42 0 0 67 4 41 9 14 8.2 16 181 8 66 19 42 67 51 47 66 6 47 68 6 10 -2.54 - 41 0 0 67 26 31 9 14 10.1 16 182 9 66 41 15 68 13 58 66 28 15 68 28 27 -2.54 - 40 0 0 67 48 20 9 14 11.9 15 183 9 67 2 47 68 36 7 66 49 42 68 50 42 -2.54 - 39 0 0 68 10 7 9 14 13.7 15 184 9 67 24 16 68 58 13 67 11 7 69 12 55 -2.54 - 38 0 0 68 31 50 9 14 15.4 15 185 10 67 45 43 69 20 15 67 32 29 69 35 4 -2.54 - 37 0 0 68 53 29 9 14 17.1 14 186 10 68 7 5 69 42 13 67 53 47 69 57 8 -2.55 - 36 0 0 69 15 3 9 14 18.7 14 187 10 68 28 24 70 4 5 68 15 1 70 19 6 -2.55 - 35 0 0 69 36 30 9 14 20.2 13 188 10 68 49 36 70 25 51 68 36 9 70 40 58 -2.55 - 34 0 0 69 57 51 9 14 21.7 13 189 11 69 10 41 70 47 29 68 57 11 71 2 41 -2.55 - 33 0 0 70 19 3 9 14 23.1 13 190 11 69 31 39 71 8 58 69 18 5 71 24 16 -2.55 - 32 0 0 70 40 6 9 14 24.4 12 191 11 69 52 29 71 30 17 69 38 51 71 45 40 -2.55 - 31 0 0 71 1 0 9 14 25.7 12 192 12 70 13 9 71 51 26 69 59 27 72 6 54 -2.55 - 30 0 0 71 21 42 9 14 27.0 11 193 12 70 33 39 72 12 23 70 19 54 72 27 56 -2.55 - 29 0 0 71 42 12 9 14 28.1 11 194 12 70 53 58 72 33 7 70 40 10 72 48 44 -2.55 - 28 0 0 72 2 30 9 14 29.2 10 195 12 71 14 5 72 53 38 71 0 14 73 9 19 -2.55 - 27 0 0 72 22 34 9 14 30.3 10 196 12 71 33 59 73 13 54 71 20 6 73 29 39 -2.55 - 26 0 0 72 42 24 9 14 31.3 10 197 13 71 53 40 73 33 54 71 39 44 73 49 44 -2.55 - 25 0 0 73 1 59 9 14 32.2 9 198 13 72 13 7 73 53 39 71 59 8 74 9 31 -2.56 - 24 0 0 73 21 18 9 14 33.1 9 199 13 72 32 19 74 13 7 72 18 18 74 29 2 -2.56 - 23 0 0 73 40 21 9 14 34.0 8 200 13 72 51 15 74 32 16 72 37 13 74 48 14 -2.56 - 22 0 0 73 59 6 9 14 34.7 8 201 13 73 9 55 74 51 8 72 55 52 75 7 8 -2.56 - 21 0 0 74 17 34 9 14 35.5 8 202 13 73 28 19 75 9 41 73 14 14 75 25 43 -2.56 - 20 0 0 74 35 44 9 14 36.2 7 203 13 73 46 25 75 27 55 73 32 20 75 43 58 -2.56 - 19 0 0 74 53 35 9 14 36.8 7 204 14 74 4 14 75 45 48 73 50 8 76 1 52 -2.56 - 18 0 0 75 11 7 9 14 37.4 7 205 14 74 21 45 76 3 21 74 7 38 76 19 26 -2.56 - 17 0 0 75 28 19 9 14 38.0 6 206 14 74 38 57 76 20 33 74 24 50 76 36 38 -2.56 - 16 0 0 75 45 10 9 14 38.5 6 207 14 74 55 50 76 37 24 74 41 44 76 53 28 -2.57 - 15 0 0 76 1 42 9 14 38.9 5 208 14 75 12 24 76 53 53 74 58 18 77 9 56 -2.57 - 14 0 0 76 17 53 9 14 39.4 5 209 14 75 28 38 77 10 0 75 14 34 77 26 2 -2.57 - 13 0 0 76 33 44 9 14 39.8 5 210 14 75 44 33 77 25 46 75 30 30 77 41 46 -2.57 - 12 0 0 76 49 13 9 14 40.1 4 211 14 76 0 8 77 41 9 75 46 6 77 57 7 -2.57 - 11 0 0 77 4 22 9 14 40.4 4 212 14 76 15 22 77 56 10 76 1 22 78 12 5 -2.57 - 10 0 0 77 19 9 9 14 40.7 4 213 14 76 30 17 78 10 48 76 16 19 78 26 41 -2.58 - 9 0 0 77 33 35 9 14 41.0 3 214 14 76 44 52 78 25 5 76 30 56 78 40 54 -2.58 - 8 0 0 77 47 41 9 14 41.2 3 215 14 76 59 6 78 38 59 76 45 13 78 54 45 -2.58 - 7 0 0 78 1 25 9 14 41.4 3 216 14 77 13 1 78 52 31 76 59 10 79 8 13 -2.59 - 6 0 0 78 14 48 9 14 41.6 3 217 14 77 26 35 79 5 42 77 12 47 79 21 19 -2.59 - 5 0 0 78 27 50 9 14 41.8 2 218 14 77 39 49 79 18 31 77 26 4 79 34 4 -2.60 - 4 0 0 78 40 32 9 14 41.9 2 219 14 77 52 43 79 30 58 77 39 2 79 46 26 -2.60 - 3 0 0 78 52 54 9 14 42.0 2 220 14 78 5 18 79 43 4 77 51 40 79 58 27 -2.61 - 2 0 0 79 4 55 9 14 42.1 1 221 14 78 17 33 79 54 49 78 3 59 80 10 7 -2.62 - 1 0 0 79 16 37 9 14 42.2 1 222 14 78 29 29 80 6 14 78 15 59 80 21 26 -2.64 0 0 0 79 27 59 9 14 42.3 1 223 14 78 41 6 80 17 18 78 27 40 80 32 25 -2.67 1 0 0 79 39 1 9 14 42.3 1 223 14 78 52 24 .. .. .. 78 39 2 .. .. .. -2.72 2 0 0 79 49 45 9 14 42.3 0 224 14 79 3 24 .. .. .. 78 50 6 .. .. .. -2.84 3 0 0 80 0 9 9 14 42.3 0 225 14 79 14 5 .. .. .. 79 0 52 .. .. .. -3.78 4 0 0 .. .. .... .. .. .. .. .. .. 79 24 28 .. .. .. 79 11 19 .. .. .. .... 5 0 0 .. .. .... .. .. .. .. .. .. 79 34 34 .. .. .. 79 21 30 .. .. .. .... 6 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 79 31 23 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: UCAC4 415-122294 * constellation : Aquila * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 19 53.9714 DE: -07 00 59.964 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 19 53.9714 DE: -07 00 59.964 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 13.9 * B mag [mag]: 14.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (234) Barbara asteroid class: Barbarian approx. diameter [km]: 46 approx. diameter ["]: 0.033 distance from Earth [AU]: 1.94510 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#101 date of fit: 2023 Feb 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", 0.003", 91.677° remarks: * orbital elements for (234)Barbara : Mean anomaly = 309.7121212930 deg Arg. of pericenter = 192.3835455665 deg Long. of node = 144.4918034985 deg Inclination = 15.3752040690 deg Eccentricity = 0.2450851124 Semimajor axis = 2.3854382188 AU Perihelion dist = 1.8008028249 AU Mag: H = 9.10, G = 0.15 Epoch of elements : MJD 60040.38404867 TDT (2023 Apr 06.3840) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1012023Feb09,1.98,2023,4,6,9.217192,-0.229259,0.898396,12.692880,3.244086,-0.005295,-0.000653,0.000000,0.000000 -42.3768,-6.9761,42.37,6.42,False UCAC4 415-122294,19.33165868,-7.0166567,14.76,13.86,13.37,0.0,0,,19.35231864,-6.9761206,0.56,0.57,0,0,1 234,Barbara,13.43,45.9,1.9451,0,0,3.854,14.67,,2.6,0 0,309.6094,2023,4,6,192.3835,144.4918,15.3752,0.24509,2.38544,1.80080,9.11,5.0,0.15 1.148,0.0130,0.0033,92,0.0048,Known errors,-1.00,-1,-1,-1 20230406_122294,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org