IOTA/IOTA-ES occultation update for (856) Backlunda / UCAC4 393-110784 event on 2023 Jun 21, 10:55 UT Visible from USA, Mexico Summary ------- On 2023 Jun 21 UT, the 45.2 km diameter asteroid (856) Backlunda will occult a 12.4 mag star in the constellation Aquila for observers along a path across USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.66 mag to 13.82 mag (the magnitude of the asteroid) for at most 4.590 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 Jun 21, 10:45 - 2023 Jun 21, 11:05 * geocentric midpoint of event [JD]: 2460116.95516037 * magnitude of target star: 12.43 * magnitude drop [mag]: 1.66 * estimated maximum duration [s]: 4.590 * Moon: 10 % sunlit, 155° distance * Sun: 159° distance * rough path description: USA, Mexico The occultation path -------------------- * approximate projected width [km]: 49 * 1 sigma uncertainty interval [path widths]: +/- 0.21 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.003", 97°) * approx speed of asteroid's shadow [km/s]: 9.8532 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 393-110784 by 856 Backlunda on 2023 Jun 21 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 - 3 6 53 11 5 19.2 0 101 -18 - 2 53 10 - 3 20 33 - 2 47 21 - 3 26 21 .... 123 0 0 - 3 18 39 11 5 19.0 1 101 -19 - 3 4 58 - 3 32 18 - 2 59 9 - 3 38 5 -0.24 124 0 0 - 3 29 51 11 5 18.6 2 101 -20 - 3 16 12 - 3 43 29 - 3 10 24 - 3 49 15 -0.33 125 0 0 - 3 40 31 11 5 18.0 3 101 -21 - 3 26 53 - 3 54 7 - 3 21 6 - 3 59 53 -0.36 126 0 0 - 3 50 37 11 5 17.1 4 101 -22 - 3 37 0 - 4 4 11 - 3 31 14 - 4 9 57 -0.38 127 0 0 - 4 0 9 11 5 16.0 5 101 -23 - 3 46 34 - 4 13 43 - 3 40 48 - 4 19 28 -0.39 128 0 0 - 4 9 9 11 5 14.7 6 101 -24 - 3 55 35 - 4 22 41 - 3 49 49 - 4 28 25 -0.40 129 0 0 - 4 17 35 11 5 13.2 7 101 -24 - 4 4 3 - 4 31 6 - 3 58 18 - 4 36 50 -0.41 130 0 0 - 4 25 29 11 5 11.5 8 101 -25 - 4 11 57 - 4 38 59 - 4 6 13 - 4 44 42 -0.41 131 0 0 - 4 32 49 11 5 9.6 9 101 -26 - 4 19 19 - 4 46 18 - 4 13 34 - 4 52 1 -0.41 132 0 0 - 4 39 37 11 5 7.5 10 101 -27 - 4 26 7 - 4 53 5 - 4 20 23 - 4 58 47 -0.42 133 0 0 - 4 45 52 11 5 5.1 11 101 -28 - 4 32 23 - 4 59 19 - 4 26 40 - 5 5 1 -0.42 134 0 0 - 4 51 34 11 5 2.6 12 101 -29 - 4 38 6 - 5 5 0 - 4 32 23 - 5 10 41 -0.42 135 0 0 - 4 56 43 11 4 59.9 13 101 -30 - 4 43 16 - 5 10 9 - 4 37 33 - 5 15 50 -0.42 136 0 0 - 5 1 20 11 4 57.0 14 101 -31 - 4 47 54 - 5 14 45 - 4 42 11 - 5 20 26 -0.42 137 0 0 - 5 5 24 11 4 53.8 15 101 -32 - 4 51 59 - 5 18 48 - 4 46 16 - 5 24 29 -0.42 138 0 0 - 5 8 56 11 4 50.5 16 101 -33 - 4 55 31 - 5 22 20 - 4 49 49 - 5 28 0 -0.42 139 0 0 - 5 11 56 11 4 47.0 17 100 -34 - 4 58 31 - 5 25 19 - 4 52 49 - 5 30 59 -0.43 140 0 0 - 5 14 23 11 4 43.3 18 100 -35 - 5 0 59 - 5 27 46 - 4 55 17 - 5 33 26 -0.43 141 0 0 - 5 16 18 11 4 39.4 19 100 -36 - 5 2 55 - 5 29 41 - 4 57 13 - 5 35 21 -0.43 142 0 0 - 5 17 41 11 4 35.3 20 100 -37 - 5 4 18 - 5 31 3 - 4 58 37 - 5 36 43 -0.43 143 0 0 - 5 18 32 11 4 31.1 21 100 -37 - 5 5 9 - 5 31 54 - 4 59 28 - 5 37 34 -0.43 144 0 0 - 5 18 51 11 4 26.6 22 100 -38 - 5 5 28 - 5 32 13 - 4 59 47 - 5 37 53 -0.43 145 0 0 - 5 18 38 11 4 22.0 23 100 -39 - 5 5 15 - 5 32 0 - 4 59 34 - 5 37 40 -0.43 146 0 0 - 5 17 54 11 4 17.2 24 100 -40 - 5 4 31 - 5 31 15 - 4 58 50 - 5 36 55 -0.43 147 0 0 - 5 16 37 11 4 12.2 25 100 -41 - 5 3 15 - 5 29 59 - 4 57 33 - 5 35 39 -0.43 148 0 0 - 5 14 50 11 4 7.0 26 100 -42 - 5 1 27 - 5 28 11 - 4 55 45 - 5 33 51 -0.43 149 0 0 - 5 12 30 11 4 1.7 27 100 -43 - 4 59 7 - 5 25 52 - 4 53 26 - 5 31 32 -0.43 150 0 0 - 5 9 39 11 3 56.1 28 100 -43 - 4 56 16 - 5 23 1 - 4 50 34 - 5 28 41 -0.43 151 0 0 - 5 6 16 11 3 50.4 29 100 -44 - 4 52 53 - 5 19 39 - 4 47 11 - 5 25 19 -0.43 152 0 0 - 5 2 22 11 3 44.6 30 100 -45 - 4 48 58 - 5 15 45 - 4 43 17 - 5 21 25 -0.43 153 0 0 - 4 57 57 11 3 38.5 31 100 -46 - 4 44 33 - 5 11 20 - 4 38 51 - 5 17 1 -0.43 154 0 0 - 4 53 1 11 3 32.3 32 101 -47 - 4 39 36 - 5 6 24 - 4 33 54 - 5 12 5 -0.43 155 0 0 - 4 47 33 11 3 25.9 33 101 -48 - 4 34 8 - 5 0 57 - 4 28 25 - 5 6 38 -0.43 156 0 0 - 4 41 35 11 3 19.3 34 101 -48 - 4 28 8 - 4 54 59 - 4 22 26 - 5 0 40 -0.43 157 0 0 - 4 35 5 11 3 12.6 34 101 -49 - 4 21 38 - 4 48 30 - 4 15 55 - 4 54 12 -0.43 158 0 0 - 4 28 4 11 3 5.8 35 101 -50 - 4 14 37 - 4 41 30 - 4 8 54 - 4 47 12 -0.43 159 0 0 - 4 20 33 11 2 58.7 36 101 -51 - 4 7 4 - 4 34 0 - 4 1 21 - 4 39 42 -0.43 160 0 0 - 4 12 30 11 2 51.5 37 101 -51 - 3 59 1 - 4 25 58 - 3 53 18 - 4 31 41 -0.43 161 0 0 - 4 3 57 11 2 44.1 38 101 -52 - 3 50 27 - 4 17 26 - 3 44 43 - 4 23 9 -0.43 162 0 0 - 3 54 54 11 2 36.6 39 102 -53 - 3 41 23 - 4 8 23 - 3 35 38 - 4 14 7 -0.43 163 0 0 - 3 45 20 11 2 28.9 40 102 -53 - 3 31 48 - 3 58 50 - 3 26 3 - 4 4 34 -0.43 164 0 0 - 3 35 15 11 2 21.1 41 102 -54 - 3 21 42 - 3 48 47 - 3 15 57 - 3 54 31 -0.43 165 0 0 - 3 24 40 11 2 13.1 42 102 -55 - 3 11 6 - 3 38 13 - 3 5 20 - 3 43 57 -0.43 166 0 0 - 3 13 35 11 2 5.0 43 103 -55 - 2 59 59 - 3 27 9 - 2 54 13 - 3 32 54 -0.43 167 0 0 - 3 1 59 11 1 56.7 44 103 -56 - 2 48 23 - 3 15 34 - 2 42 36 - 3 21 20 -0.43 168 0 0 - 2 49 53 11 1 48.3 45 103 -57 - 2 36 16 - 3 3 30 - 2 30 28 - 3 9 16 -0.43 169 0 0 - 2 37 18 11 1 39.7 45 104 -57 - 2 23 39 - 2 50 56 - 2 17 51 - 2 56 42 -0.43 170 0 0 - 2 24 12 11 1 31.0 46 104 -58 - 2 10 32 - 2 37 51 - 2 4 43 - 2 43 39 -0.43 171 0 0 - 2 10 37 11 1 22.1 47 105 -58 - 1 56 55 - 2 24 18 - 1 51 6 - 2 30 5 -0.43 172 0 0 - 1 56 32 11 1 13.1 48 105 -59 - 1 42 48 - 2 10 14 - 1 36 59 - 2 16 2 -0.43 173 0 0 - 1 41 57 11 1 4.0 49 106 -59 - 1 28 12 - 1 55 41 - 1 22 22 - 2 1 30 -0.43 174 0 0 - 1 26 53 11 0 54.7 50 106 -60 - 1 13 7 - 1 40 38 - 1 7 16 - 1 46 28 -0.43 175 0 0 - 1 11 20 11 0 45.3 51 107 -60 - 0 57 32 - 1 25 7 - 0 51 40 - 1 30 57 -0.43 176 0 0 - 0 55 18 11 0 35.7 51 107 -61 - 0 41 28 - 1 9 6 - 0 35 35 - 1 14 57 -0.43 177 0 0 - 0 38 46 11 0 26.1 52 108 -61 - 0 24 55 - 0 52 36 - 0 19 1 - 0 58 28 -0.43 178 0 0 - 0 21 46 11 0 16.3 53 109 -61 - 0 7 53 - 0 35 38 - 0 1 59 - 0 41 30 -0.43 179 0 0 - 0 4 17 11 0 6.3 54 110 -62 0 9 38 - 0 18 11 0 15 33 - 0 24 4 -0.43 -180 0 0 0 13 40 10 59 56.3 55 111 -62 0 27 37 - 0 0 15 0 33 33 - 0 6 9 -0.43 -179 0 0 0 32 6 10 59 46.2 55 111 -62 0 46 5 0 18 9 0 52 1 0 12 14 -0.43 -178 0 0 0 51 0 10 59 35.9 56 112 -62 1 5 1 0 37 1 1 10 58 0 31 5 -0.43 -177 0 0 1 10 22 10 59 25.5 57 113 -63 1 24 25 0 56 21 1 30 23 0 50 24 -0.43 -176 0 0 1 30 11 10 59 15.0 58 115 -63 1 44 16 1 16 8 1 50 15 1 10 11 -0.43 -175 0 0 1 50 28 10 59 4.4 58 116 -63 2 4 35 1 36 23 2 10 35 1 30 25 -0.43 -174 0 0 2 11 12 10 58 53.7 59 117 -63 2 25 21 1 57 5 2 31 22 1 51 6 -0.43 -173 0 0 2 32 24 10 58 42.9 60 118 -63 2 46 34 2 18 14 2 52 36 2 12 15 -0.43 -172 0 0 2 54 1 10 58 32.0 61 120 -63 3 8 14 2 39 50 3 14 17 2 33 49 -0.43 -171 0 0 3 16 6 10 58 21.1 61 121 -62 3 30 21 3 1 52 3 36 24 2 55 51 -0.43 -170 0 0 3 38 36 10 58 10.0 62 123 -62 3 52 53 3 24 20 3 58 57 3 18 18 -0.43 -169 0 0 4 1 32 10 57 58.8 62 124 -62 4 15 51 3 47 14 4 21 56 3 41 11 -0.43 -168 0 0 4 24 54 10 57 47.6 63 126 -62 4 39 15 4 10 34 4 45 21 4 4 29 -0.43 -167 0 0 4 48 40 10 57 36.3 63 128 -62 5 3 4 4 34 18 5 9 11 4 28 13 -0.43 -166 0 0 5 12 52 10 57 24.9 64 130 -61 5 27 18 4 58 28 5 33 26 4 52 21 -0.43 -165 0 0 5 37 28 10 57 13.5 64 132 -61 5 51 56 5 23 1 5 58 5 5 16 54 -0.43 -164 0 0 6 2 28 10 57 2.0 65 134 -61 6 16 58 5 47 59 6 23 8 5 41 51 -0.43 -163 0 0 6 27 51 10 56 50.4 65 136 -60 6 42 24 6 13 20 6 48 35 6 7 11 -0.43 -162 0 0 6 53 38 10 56 38.8 65 138 -60 7 8 13 6 39 5 7 14 24 6 32 55 -0.43 -161 0 0 7 19 47 10 56 27.2 66 141 -59 7 34 24 7 5 12 7 40 37 6 59 1 -0.43 -160 0 0 7 46 19 10 56 15.4 66 143 -59 8 0 58 7 31 41 8 7 12 7 25 29 -0.43 -159 0 0 8 13 12 10 56 3.7 66 145 -58 8 27 54 7 58 32 8 34 9 7 52 19 -0.43 -158 0 0 8 40 27 10 55 51.9 66 148 -57 8 55 11 8 25 45 9 1 27 8 19 31 -0.43 -157 0 0 9 8 2 10 55 40.1 66 150 -57 9 22 49 8 53 18 9 29 5 8 47 3 -0.44 -156 0 0 9 35 58 10 55 28.3 66 153 -56 9 50 46 9 21 11 9 57 4 9 14 56 -0.44 -155 0 0 10 4 13 10 55 16.5 66 156 -56 10 19 4 9 49 24 10 25 23 9 43 8 -0.44 -154 0 0 10 32 48 10 55 4.7 66 158 -55 10 47 41 10 17 57 10 54 0 10 11 39 -0.44 -153 0 0 11 1 40 10 54 52.8 66 161 -54 11 16 36 10 46 47 11 22 56 10 40 29 -0.44 -152 0 0 11 30 51 10 54 41.0 66 163 -53 11 45 48 11 15 56 11 52 10 11 9 36 -0.44 -151 0 0 12 0 19 10 54 29.2 66 166 -53 12 15 19 11 45 21 12 21 41 11 39 1 -0.44 -150 0 0 12 30 3 10 54 17.3 66 168 -52 12 45 5 12 15 4 12 51 28 12 8 42 -0.44 -149 0 0 13 0 4 10 54 5.6 65 171 -51 13 15 8 12 45 2 13 21 32 12 38 40 -0.44 -148 0 0 13 30 19 10 53 53.8 65 173 -50 13 45 25 13 15 15 13 51 50 13 8 52 -0.44 -147 0 0 14 0 49 10 53 42.1 64 175 -49 14 15 57 13 45 43 14 22 23 13 39 19 -0.44 -146 0 0 14 31 33 10 53 30.4 64 177 -49 14 46 43 14 16 25 14 53 10 14 10 0 -0.44 -145 0 0 15 2 29 10 53 18.7 64 180 -48 15 17 41 14 47 19 15 24 9 14 40 54 -0.44 -144 0 0 15 33 38 10 53 7.1 63 182 -47 15 48 52 15 18 26 15 55 21 15 12 0 -0.44 -143 0 0 16 4 59 10 52 55.6 62 184 -46 16 20 15 15 49 45 16 26 44 15 43 18 -0.44 -142 0 0 16 36 30 10 52 44.1 62 186 -45 16 51 47 16 21 14 16 58 17 16 14 46 -0.44 -141 0 0 17 8 10 10 52 32.7 61 187 -44 17 23 30 16 52 53 17 30 1 16 46 24 -0.44 -140 0 0 17 40 0 10 52 21.4 61 189 -43 17 55 22 17 24 41 18 1 53 17 18 12 -0.44 -139 0 0 18 11 58 10 52 10.2 60 191 -42 18 27 21 17 56 37 18 33 53 17 50 7 -0.44 -138 0 0 18 44 3 10 51 59.0 59 192 -42 18 59 28 18 28 41 19 6 1 18 22 10 -0.45 -137 0 0 19 16 15 10 51 48.0 58 194 -41 19 31 41 19 0 51 19 38 15 18 54 20 -0.45 -136 0 0 19 48 32 10 51 37.0 58 196 -40 20 4 0 19 33 7 20 10 34 19 26 35 -0.45 -135 0 0 20 20 54 10 51 26.2 57 197 -39 20 36 23 20 5 28 20 42 58 19 58 55 -0.45 -134 0 0 20 53 20 10 51 15.4 56 198 -38 21 8 51 20 37 52 21 15 26 20 31 19 -0.45 -133 0 0 21 25 49 10 51 4.8 55 200 -37 21 41 20 21 10 19 21 47 56 21 3 46 -0.45 -132 0 0 21 58 19 10 50 54.3 55 201 -36 22 13 52 21 42 49 22 20 29 21 36 15 -0.45 -131 0 0 22 30 51 10 50 44.0 54 202 -35 22 46 25 22 15 19 22 53 2 22 8 45 -0.45 -130 0 0 23 3 23 10 50 33.8 53 203 -34 23 18 58 22 47 50 23 25 35 22 41 15 -0.45 -129 0 0 23 35 54 10 50 23.7 52 204 -33 23 51 30 23 20 21 23 58 8 23 13 45 -0.45 -128 0 0 24 8 24 10 50 13.7 51 206 -32 24 24 0 23 52 49 24 30 38 23 46 13 -0.45 -127 0 0 24 40 50 10 50 4.0 50 207 -31 24 56 28 24 25 15 25 3 6 24 18 39 -0.45 -126 0 0 25 13 14 10 49 54.3 49 208 -30 25 28 52 24 57 38 25 35 31 24 51 2 -0.45 -125 0 0 25 45 33 10 49 44.8 49 209 -29 26 1 12 25 29 56 26 7 51 25 23 20 -0.45 -124 0 0 26 17 47 10 49 35.5 48 210 -28 26 33 26 26 2 10 26 40 5 25 55 33 -0.45 -123 0 0 26 49 54 10 49 26.4 47 211 -27 27 5 34 26 34 17 27 12 13 26 27 40 -0.45 -122 0 0 27 21 55 10 49 17.4 46 212 -26 27 37 35 27 6 17 27 44 14 26 59 40 -0.45 -121 0 0 27 53 47 10 49 8.6 45 212 -25 28 9 27 27 38 10 28 16 7 27 31 32 -0.45 -120 0 0 28 25 31 10 48 59.9 44 213 -24 28 41 11 28 9 53 28 47 51 28 3 16 -0.45 -119 0 0 28 57 5 10 48 51.5 43 214 -23 29 12 45 28 41 28 29 19 25 28 34 50 -0.45 -118 0 0 29 28 29 10 48 43.2 42 215 -23 29 44 9 29 12 51 29 50 49 29 6 14 -0.45 -117 0 0 29 59 42 10 48 35.1 41 216 -22 30 15 21 29 44 4 30 22 1 29 37 27 -0.45 -116 0 0 30 30 42 10 48 27.2 40 217 -21 30 46 21 30 15 5 30 53 1 30 8 28 -0.45 -115 0 0 31 1 29 10 48 19.5 40 217 -20 31 17 8 30 45 53 31 23 48 30 39 16 -0.45 -114 0 0 31 32 3 10 48 11.9 39 218 -19 31 47 42 31 16 27 31 54 21 31 9 51 -0.45 -113 0 0 32 2 23 10 48 4.6 38 219 -18 32 18 1 31 46 47 32 24 39 31 40 11 -0.45 -112 0 0 32 32 28 10 47 57.4 37 220 -17 32 48 5 32 16 53 32 54 43 32 10 17 -0.45 -111 0 0 33 2 16 10 47 50.4 36 220 -16 33 17 53 32 46 42 33 24 31 32 40 7 -0.45 -110 0 0 33 31 49 10 47 43.7 35 221 -15 33 47 24 33 16 16 33 54 2 33 9 40 -0.45 -109 0 0 34 1 4 10 47 37.1 34 222 -14 34 16 39 33 45 32 34 23 16 33 38 57 -0.45 -108 0 0 34 30 2 10 47 30.7 33 223 -13 34 45 35 34 14 31 34 52 12 34 7 56 -0.46 -107 0 0 34 58 41 10 47 24.5 32 223 -12 35 14 13 34 43 12 35 20 50 34 36 38 -0.46 -106 0 0 35 27 2 10 47 18.5 31 224 -11 35 42 33 35 11 33 35 49 8 35 5 0 -0.46 -105 0 0 35 55 3 10 47 12.6 31 225 -10 36 10 33 35 39 36 36 17 8 35 33 3 -0.46 -104 0 0 36 22 45 10 47 7.0 30 226 -9 36 38 13 36 7 19 36 44 47 36 0 47 -0.46 -103 0 0 36 50 6 10 47 1.6 29 226 -9 37 5 32 36 34 41 37 12 6 36 28 10 -0.46 -102 0 0 37 17 6 10 46 56.3 28 227 -8 37 32 31 37 1 43 37 39 4 36 55 12 -0.46 -101 0 0 37 43 45 10 46 51.2 27 228 -7 37 59 8 37 28 24 38 5 40 37 21 54 -0.46 -100 0 0 38 10 2 10 46 46.4 26 228 -6 38 25 23 37 54 43 38 31 55 37 48 14 -0.46 - 99 0 0 38 35 57 10 46 41.6 25 229 -5 38 51 17 38 20 40 38 57 47 38 14 11 -0.46 - 98 0 0 39 1 30 10 46 37.1 24 230 -4 39 16 48 38 46 15 39 23 17 38 39 47 -0.46 - 97 0 0 39 26 40 10 46 32.8 24 230 -3 39 41 56 39 11 27 39 48 25 39 5 0 -0.46 - 96 0 0 39 51 27 10 46 28.6 23 231 -2 40 6 41 39 36 16 40 13 9 39 29 50 -0.46 - 95 0 0 40 15 51 10 46 24.6 22 232 -2 40 31 2 40 0 42 40 37 30 39 54 16 -0.46 - 94 0 0 40 39 51 10 46 20.8 21 233 -1 40 55 0 40 24 44 41 1 27 40 18 20 -0.46 - 93 0 0 41 3 28 10 46 17.2 20 233 0 41 18 35 40 48 23 41 25 0 40 41 59 -0.46 - 92 0 0 41 26 40 10 46 13.7 19 234 1 41 41 45 41 11 37 41 48 9 41 5 15 -0.46 - 91 0 0 41 49 28 10 46 10.4 19 235 2 42 4 31 41 34 28 42 10 55 41 28 6 -0.46 - 90 0 0 42 11 53 10 46 7.2 18 235 3 42 26 53 41 56 54 42 33 15 41 50 34 -0.45 - 89 0 0 42 33 52 10 46 4.2 17 236 3 42 48 50 42 18 56 42 55 12 42 12 37 -0.45 - 88 0 0 42 55 27 10 46 1.4 16 237 4 43 10 23 42 40 34 43 16 43 42 34 15 -0.45 - 87 0 0 43 16 38 10 45 58.7 15 237 5 43 31 31 43 1 46 43 37 50 42 55 29 -0.45 - 86 0 0 43 37 23 10 45 56.2 15 238 6 43 52 14 43 22 34 43 58 32 43 16 18 -0.45 - 85 0 0 43 57 44 10 45 53.8 14 239 7 44 12 32 43 42 58 44 18 50 43 36 42 -0.45 - 84 0 0 44 17 40 10 45 51.6 13 240 7 44 32 26 44 2 56 44 38 42 43 56 42 -0.45 - 83 0 0 44 37 12 10 45 49.5 12 240 8 44 51 55 44 22 30 44 58 10 44 16 17 -0.45 - 82 0 0 44 56 18 10 45 47.6 11 241 9 45 10 59 44 41 39 45 17 13 44 35 27 -0.45 - 81 0 0 45 15 0 10 45 45.8 11 242 10 45 29 38 45 0 23 45 35 51 44 54 12 -0.45 - 80 0 0 45 33 17 10 45 44.1 10 242 10 45 47 52 45 18 43 45 54 4 45 12 32 -0.45 - 79 0 0 45 51 9 10 45 42.6 9 243 11 46 5 42 45 36 37 46 11 53 45 30 28 -0.45 - 78 0 0 46 8 36 10 45 41.2 8 244 12 46 23 7 45 54 7 46 29 17 45 47 59 -0.46 - 77 0 0 46 25 39 10 45 39.9 8 245 13 46 40 7 46 11 12 46 46 16 46 5 5 -0.46 - 76 0 0 46 42 17 10 45 38.8 7 245 13 46 56 43 46 27 53 47 2 51 46 21 47 -0.46 - 75 0 0 46 58 30 10 45 37.8 6 246 14 47 12 54 46 44 9 47 19 1 46 38 4 -0.46 - 74 0 0 47 14 20 10 45 36.9 5 247 15 47 28 40 47 0 0 47 34 46 46 53 56 -0.46 - 73 0 0 47 29 44 10 45 36.1 5 247 16 47 44 3 47 15 28 47 50 8 47 9 24 -0.46 - 72 0 0 47 44 45 10 45 35.4 4 248 16 47 59 1 47 30 30 48 5 5 47 24 28 -0.46 - 71 0 0 47 59 21 10 45 34.9 3 249 17 48 13 35 47 45 9 48 19 38 47 39 8 -0.46 - 70 0 0 48 13 34 10 45 34.4 3 250 18 48 27 45 47 59 24 48 33 47 47 53 24 -0.47 - 69 0 0 48 27 22 10 45 34.1 2 250 18 48 41 31 48 13 15 48 47 32 48 7 16 -0.47 - 68 0 0 48 40 47 10 45 33.9 1 251 19 48 54 54 48 26 42 49 0 54 48 20 44 -0.49 - 67 0 0 48 53 48 10 45 33.8 0 252 20 49 7 53 48 39 45 49 13 52 48 33 48 -0.55 Uncertainty in time = +/- 2 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: UCAC4 393-110784 * constellation : Aquila * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 10 19.7328 DE: -11 31 59.345 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 10 19.7328 DE: -11 31 59.345 * 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: (856) Backlunda asteroid class: approx. diameter [km]: 45 approx. diameter ["]: 0.045 distance from Earth [AU]: 1.37900 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#94 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): 0.017", 0.003", 96.713° remarks: * orbital elements for (856)Backlunda : Mean anomaly = 67.6844785529 deg Arg. of pericenter = 72.6267781419 deg Long. of node = 125.5325795997 deg Inclination = 14.3267748390 deg Eccentricity = 0.1191706580 Semimajor axis = 2.4350355101 AU Perihelion dist = 2.1448507261 AU Mag: H = 10.66, G = 0.15 Epoch of elements : MJD 60116.45506945 TDT (2023 Jun 21.4551) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#942023Apr24,4.59,2023,6,21,10.923849,-0.178984,0.357173,-4.971998,-2.491683,-0.001517,-0.001166,0.000001,0.000000 -145.3298,-11.4952,16.59,23.44,False UCAC4 393-110784,19.17214799,-11.5331514,0.00,12.43,0.00,0.0,0,,19.19409844,-11.4951945,1.66,0.00,0,0,0 856,Backlunda,13.82,45.2,1.3790,0,0,-2.157,-15.90,,2.6,0 0,67.5664,2023,6,21,72.6268,125.5326,14.3268,0.11917,2.43504,2.14485,10.66,5.0,0.15 1.212,0.0170,0.0026,97,0.0096,Known errors,-1.00,-1,-1,-1 20230621_110784,60063.20 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:42 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org