IOTA/IOTA-ES occultation update for (856) Backlunda / TYC 5278-02029-1 event on 2024 Nov 19, 11:21 UT Visible from Summary ------- On 2024 Nov 19 UT, the 45.232 km diameter asteroid (856) Backlunda will occult a 11.8 mag star in the constellation Cetus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.21 mag to 14.96 mag (the magnitude of the asteroid) for at most 4.730 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: 2024 Nov 19, 11:10 - 2024 Nov 19, 11:32 * geocentric midpoint of event [JD]: 2460633.97339304 * magnitude of target star: 11.81 * magnitude drop [mag]: 3.21 * estimated maximum duration [s]: 4.730 * Moon: 84 % sunlit, 83° distance * Sun: 141° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 47 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.003", 73°) * approx speed of asteroid's shadow [km/s]: 9.5670 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5278-02029-1 by 856 Backlunda on 2024 Nov 19 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 72 0 0 21 17 17 11 32 29.5 0 101 11 21 30 10 21 4 25 21 36 15 20 58 20 .... 73 0 0 21 6 8 11 32 29.4 1 102 11 21 19 1 20 53 16 21 25 7 20 47 11 -0.10 74 0 0 20 54 51 11 32 29.0 2 102 10 21 7 45 20 41 58 21 13 50 20 35 53 -0.16 75 0 0 20 43 26 11 32 28.5 3 102 9 20 56 20 20 30 33 21 2 26 20 24 28 -0.19 76 0 0 20 31 53 11 32 27.8 4 103 8 20 44 47 20 19 0 20 50 53 20 12 54 -0.20 77 0 0 20 20 12 11 32 26.9 5 103 8 20 33 7 20 7 18 20 39 13 20 1 13 -0.21 78 0 0 20 8 24 11 32 25.8 6 103 7 20 21 19 19 55 30 20 27 25 19 49 24 -0.22 79 0 0 19 56 29 11 32 24.5 7 104 6 20 9 24 19 43 34 20 15 30 19 37 28 -0.22 80 0 0 19 44 26 11 32 23.0 8 104 5 19 57 21 19 31 31 20 3 28 19 25 25 -0.22 81 0 0 19 32 16 11 32 21.3 9 104 4 19 45 12 19 19 21 19 51 19 19 13 15 -0.23 82 0 0 19 20 0 11 32 19.4 10 105 4 19 32 56 19 7 5 19 39 3 19 0 59 -0.23 83 0 0 19 7 38 11 32 17.4 11 105 3 19 20 34 18 54 42 19 26 41 18 48 36 -0.23 84 0 0 18 55 9 11 32 15.1 12 105 2 19 8 6 18 42 13 19 14 13 18 36 7 -0.23 85 0 0 18 42 34 11 32 12.7 13 106 1 18 55 31 18 29 38 19 1 39 18 23 32 -0.23 86 0 0 18 29 54 11 32 10.1 14 106 0 18 42 51 18 16 58 18 48 59 18 10 51 -0.23 87 0 0 18 17 8 11 32 7.3 15 106 0 18 30 6 18 4 11 18 36 13 17 58 5 -0.23 88 0 0 18 4 17 11 32 4.3 16 107 -1 18 17 15 17 51 20 18 23 22 17 45 13 -0.24 89 0 0 17 51 21 11 32 1.1 17 107 -2 18 4 19 17 38 24 18 10 27 17 32 17 -0.24 90 0 0 17 38 20 11 31 57.7 18 107 -3 17 51 18 17 25 23 17 57 26 17 19 16 -0.24 91 0 0 17 25 15 11 31 54.1 19 108 -4 17 38 13 17 12 17 17 44 21 17 6 10 -0.24 92 0 0 17 12 5 11 31 50.4 19 108 -4 17 25 3 16 59 7 17 31 11 16 53 0 -0.24 93 0 0 16 58 51 11 31 46.4 20 108 -5 17 11 50 16 45 54 17 17 58 16 39 46 -0.24 94 0 0 16 45 34 11 31 42.3 21 109 -6 16 58 33 16 32 36 17 4 41 16 26 29 -0.24 95 0 0 16 32 13 11 31 38.0 22 109 -7 16 45 12 16 19 15 16 51 20 16 13 7 -0.24 96 0 0 16 18 49 11 31 33.5 23 109 -8 16 31 48 16 5 50 16 37 56 15 59 43 -0.24 97 0 0 16 5 21 11 31 28.9 24 109 -9 16 18 20 15 52 23 16 24 29 15 46 16 -0.24 98 0 0 15 51 51 11 31 24.0 25 110 -9 16 4 50 15 38 53 16 10 59 15 32 46 -0.24 99 0 0 15 38 19 11 31 19.0 26 110 -10 15 51 18 15 25 20 15 57 26 15 19 13 -0.24 100 0 0 15 24 44 11 31 13.8 27 110 -11 15 37 43 15 11 46 15 43 52 15 5 38 -0.24 101 0 0 15 11 7 11 31 8.4 28 111 -12 15 24 7 14 58 9 15 30 15 14 52 1 -0.24 102 0 0 14 57 29 11 31 2.9 29 111 -13 15 10 28 14 44 30 15 16 37 14 38 23 -0.24 103 0 0 14 43 49 11 30 57.1 30 111 -13 14 56 48 14 30 50 15 2 57 14 24 43 -0.24 104 0 0 14 30 8 11 30 51.2 31 112 -14 14 43 7 14 17 9 14 49 16 14 11 2 -0.24 105 0 0 14 16 26 11 30 45.2 32 112 -15 14 29 25 14 3 27 14 35 34 13 57 20 -0.24 106 0 0 14 2 43 11 30 38.9 33 112 -16 14 15 42 13 49 44 14 21 51 13 43 37 -0.24 107 0 0 13 49 0 11 30 32.5 34 113 -17 14 1 59 13 36 1 14 8 7 13 29 54 -0.24 108 0 0 13 35 16 11 30 26.0 35 113 -18 13 48 15 13 22 18 13 54 24 13 16 10 -0.24 109 0 0 13 21 33 11 30 19.3 36 113 -19 13 34 32 13 8 35 13 40 41 13 2 27 -0.24 110 0 0 13 7 50 11 30 12.4 37 114 -19 13 20 49 12 54 52 13 26 57 12 48 44 -0.24 111 0 0 12 54 8 11 30 5.3 38 114 -20 13 7 7 12 41 9 13 13 15 12 35 2 -0.24 112 0 0 12 40 26 11 29 58.1 39 114 -21 12 53 25 12 27 28 12 59 33 12 21 21 -0.24 113 0 0 12 26 46 11 29 50.8 40 115 -22 12 39 44 12 13 48 12 45 53 12 7 40 -0.24 114 0 0 12 13 7 11 29 43.3 41 115 -23 12 26 5 12 0 9 12 32 13 11 54 1 -0.24 115 0 0 11 59 29 11 29 35.6 42 116 -24 12 12 28 11 46 31 12 18 36 11 40 24 -0.24 116 0 0 11 45 54 11 29 27.9 42 116 -24 11 58 52 11 32 56 12 5 0 11 26 49 -0.24 117 0 0 11 32 20 11 29 19.9 43 116 -25 11 45 18 11 19 23 11 51 26 11 13 16 -0.24 118 0 0 11 18 49 11 29 11.8 44 117 -26 11 31 47 11 5 52 11 37 55 10 59 45 -0.24 119 0 0 11 5 21 11 29 3.6 45 117 -27 11 18 18 10 52 24 11 24 26 10 46 17 -0.24 120 0 0 10 51 55 11 28 55.3 46 118 -28 11 4 53 10 38 58 11 11 0 10 32 51 -0.24 121 0 0 10 38 33 11 28 46.8 47 118 -29 10 51 30 10 25 36 10 57 38 10 19 29 -0.24 122 0 0 10 25 14 11 28 38.2 48 119 -29 10 38 11 10 12 17 10 44 18 10 6 10 -0.24 123 0 0 10 11 58 11 28 29.5 49 119 -30 10 24 55 9 59 2 10 31 2 9 52 55 -0.24 124 0 0 9 58 46 11 28 20.6 50 119 -31 10 11 43 9 45 50 10 17 50 9 39 44 -0.24 125 0 0 9 45 39 11 28 11.6 51 120 -32 9 58 35 9 32 43 10 4 42 9 26 37 -0.24 126 0 0 9 32 35 11 28 2.5 52 120 -33 9 45 32 9 19 40 9 51 39 9 13 34 -0.24 127 0 0 9 19 37 11 27 53.3 53 121 -34 9 32 33 9 6 42 9 38 40 9 0 36 -0.24 128 0 0 9 6 43 11 27 44.0 54 122 -35 9 19 39 8 53 48 9 25 45 8 47 42 -0.24 129 0 0 8 53 54 11 27 34.6 55 122 -35 9 6 49 8 40 59 9 12 56 8 34 53 -0.24 130 0 0 8 41 10 11 27 25.0 56 123 -36 8 54 5 8 28 16 9 0 12 8 22 10 -0.24 131 0 0 8 28 32 11 27 15.4 56 123 -37 8 41 27 8 15 38 8 47 33 8 9 32 -0.24 132 0 0 8 15 59 11 27 5.6 57 124 -38 8 28 54 8 3 5 8 35 0 7 57 0 -0.24 133 0 0 8 3 32 11 26 55.8 58 125 -39 8 16 27 7 50 39 8 22 33 7 44 34 -0.24 134 0 0 7 51 12 11 26 45.9 59 126 -40 8 4 6 7 38 19 8 10 12 7 32 13 -0.24 135 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45 4 58 7 5 29 49 4 52 5 -0.24 149 0 0 5 0 30 11 24 8.0 71 145 -52 5 13 19 4 47 42 5 19 23 4 41 40 -0.24 150 0 0 4 50 14 11 23 57.1 72 147 -52 5 3 3 4 37 26 5 9 6 4 31 24 -0.24 151 0 0 4 40 7 11 23 46.1 73 150 -53 4 52 55 4 27 20 4 58 58 4 21 17 -0.24 152 0 0 4 30 9 11 23 35.0 73 152 -54 4 42 57 4 17 22 4 49 0 4 11 20 -0.24 153 0 0 4 20 21 11 23 24.0 74 155 -55 4 33 9 4 7 35 4 39 12 4 1 33 -0.24 154 0 0 4 10 43 11 23 12.9 74 158 -56 4 23 30 3 57 57 4 29 33 3 51 55 -0.24 155 0 0 4 1 15 11 23 1.7 75 161 -56 4 14 1 3 48 29 4 20 4 3 42 27 -0.24 156 0 0 3 51 56 11 22 50.6 75 164 -57 4 4 43 3 39 11 4 10 45 3 33 9 -0.24 157 0 0 3 42 48 11 22 39.5 76 168 -58 3 55 34 3 30 3 4 1 36 3 24 2 -0.24 158 0 0 3 33 50 11 22 28.3 76 171 -59 3 46 36 3 21 6 3 52 38 3 15 4 -0.24 159 0 0 3 25 3 11 22 17.1 76 175 -59 3 37 48 3 12 19 3 43 50 3 6 18 -0.24 160 0 0 3 16 26 11 22 5.9 76 179 -60 3 29 11 3 3 42 3 35 13 2 57 41 -0.24 161 0 0 3 8 0 11 21 54.7 77 183 -61 3 20 45 2 55 17 3 26 47 2 49 16 -0.24 162 0 0 2 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51 11 14 50.8 49 254 -66 0 29 28 0 4 14 0 35 26 - 0 1 43 -0.24 -157 0 0 0 17 17 11 14 42.2 48 254 -66 0 29 54 0 4 40 0 35 52 - 0 1 17 -0.24 -156 0 0 0 17 56 11 14 33.7 47 254 -65 0 30 34 0 5 20 0 36 32 - 0 0 38 -0.24 -155 0 0 0 18 50 11 14 25.3 46 255 -64 0 31 27 0 6 13 0 37 26 0 0 16 -0.24 -154 0 0 0 19 57 11 14 17.1 45 255 -64 0 32 35 0 7 20 0 38 33 0 1 23 -0.24 -153 0 0 0 21 18 11 14 9.0 44 255 -63 0 33 56 0 8 41 0 39 54 0 2 44 -0.24 -152 0 0 0 22 53 11 14 1.0 43 255 -62 0 35 31 0 10 16 0 41 29 0 4 19 -0.24 -151 0 0 0 24 42 11 13 53.1 42 256 -62 0 37 20 0 12 5 0 43 18 0 6 7 -0.24 -150 0 0 0 26 44 11 13 45.4 41 256 -61 0 39 22 0 14 7 0 45 21 0 8 9 -0.24 -149 0 0 0 29 0 11 13 37.8 40 256 -60 0 41 39 0 16 23 0 47 37 0 10 25 -0.24 -148 0 0 0 31 30 11 13 30.3 39 256 -60 0 44 9 0 18 53 0 50 7 0 12 55 -0.24 -147 0 0 0 34 14 11 13 23.0 39 256 -59 0 46 53 0 21 36 0 52 51 0 15 39 -0.24 -146 0 0 0 37 12 11 13 15.9 38 256 -58 0 49 50 0 24 34 0 55 49 0 18 36 -0.24 -145 0 0 0 40 23 11 13 8.9 37 257 -58 0 53 2 0 27 45 0 59 1 0 21 47 -0.24 -144 0 0 0 43 48 11 13 2.0 36 257 -57 0 56 27 0 31 10 1 2 26 0 25 12 -0.24 -143 0 0 0 47 27 11 12 55.3 35 257 -56 1 0 6 0 34 48 1 6 5 0 28 50 -0.24 -142 0 0 0 51 19 11 12 48.8 34 257 -55 1 3 58 0 38 40 1 9 57 0 32 42 -0.24 -141 0 0 0 55 25 11 12 42.4 33 257 -55 1 8 5 0 42 46 1 14 4 0 36 48 -0.24 -140 0 0 0 59 44 11 12 36.1 32 257 -54 1 12 24 0 47 5 1 18 24 0 41 7 -0.24 -139 0 0 1 4 18 11 12 30.1 31 257 -53 1 16 58 0 51 38 1 22 57 0 45 40 -0.24 -138 0 0 1 9 4 11 12 24.2 30 257 -52 1 21 45 0 56 25 1 27 44 0 50 26 -0.24 -137 0 0 1 14 4 11 12 18.4 29 257 -51 1 26 45 1 1 25 1 32 45 0 55 26 -0.24 -136 0 0 1 19 18 11 12 12.8 28 258 -51 1 31 59 1 6 38 1 37 59 1 0 39 -0.24 -135 0 0 1 24 45 11 12 7.4 27 258 -50 1 37 26 1 12 5 1 43 26 1 6 5 -0.25 -134 0 0 1 30 25 11 12 2.2 26 258 -49 1 43 7 1 17 45 1 49 7 1 11 45 -0.25 -133 0 0 1 36 19 11 11 57.2 25 258 -48 1 49 1 1 23 38 1 55 1 1 17 39 -0.25 -132 0 0 1 42 26 11 11 52.3 24 258 -47 1 55 8 1 29 45 2 1 8 1 23 45 -0.25 -131 0 0 1 48 46 11 11 47.6 23 258 -47 2 1 28 1 36 4 2 7 29 1 30 5 -0.25 -130 0 0 1 55 19 11 11 43.0 22 258 -46 2 8 2 1 42 37 2 14 3 1 36 37 -0.25 -129 0 0 2 2 5 11 11 38.7 21 258 -45 2 14 48 1 49 23 2 20 49 1 43 23 -0.25 -128 0 0 2 9 4 11 11 34.6 20 258 -44 2 21 48 1 56 22 2 27 49 1 50 21 -0.25 -127 0 0 2 16 16 11 11 30.6 19 258 -43 2 29 0 2 3 33 2 35 1 1 57 33 -0.25 -126 0 0 2 23 41 11 11 26.8 18 258 -42 2 36 25 2 10 57 2 42 27 2 4 57 -0.25 -125 0 0 2 31 18 11 11 23.2 17 258 -42 2 44 3 2 18 34 2 50 4 2 12 34 -0.25 -124 0 0 2 39 8 11 11 19.8 16 258 -41 2 51 53 2 26 24 2 57 55 2 20 23 -0.25 -123 0 0 2 47 11 11 11 16.6 15 259 -40 2 59 56 2 34 26 3 5 58 2 28 25 -0.25 -122 0 0 2 55 26 11 11 13.6 14 259 -39 3 8 11 2 42 41 3 14 13 2 36 39 -0.25 -121 0 0 3 3 53 11 11 10.8 13 259 -38 3 16 39 2 51 7 3 22 41 2 45 6 -0.25 -120 0 0 3 12 32 11 11 8.2 12 259 -37 3 25 19 2 59 46 3 31 21 2 53 45 -0.25 -119 0 0 3 21 24 11 11 5.8 11 259 -36 3 34 10 3 8 37 3 40 13 3 2 36 -0.25 -118 0 0 3 30 27 11 11 3.6 10 259 -36 3 43 14 3 17 40 3 49 17 3 11 38 -0.25 -117 0 0 3 39 42 11 11 1.6 9 259 -35 3 52 30 3 26 55 3 58 33 3 20 53 -0.25 -116 0 0 3 49 9 11 10 59.8 8 259 -34 4 1 57 3 36 21 4 8 0 3 30 19 -0.25 -115 0 0 3 58 47 11 10 58.2 7 259 -33 4 11 36 3 45 59 4 17 39 3 39 57 -0.25 -114 0 0 4 8 37 11 10 56.8 6 259 -32 4 21 26 3 55 48 4 27 29 3 49 46 -0.26 -113 0 0 4 18 38 11 10 55.6 5 259 -31 4 31 27 4 5 49 4 37 31 3 59 46 -0.26 -112 0 0 4 28 50 11 10 54.7 4 259 -30 4 41 40 4 16 1 4 47 44 4 9 57 -0.26 -111 0 0 4 39 13 11 10 53.9 3 259 -29 4 52 3 4 26 23 4 58 7 4 20 20 -0.27 -110 0 0 4 49 46 11 10 53.3 2 259 -29 5 2 37 4 36 57 5 8 42 4 30 53 -0.27 -109 0 0 5 0 31 11 10 53.0 1 260 -28 5 13 22 4 47 40 5 19 26 4 41 37 -0.30 -108 0 0 5 11 26 11 10 52.9 0 260 -27 5 24 17 4 58 35 5 30 22 4 52 31 -1.00 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 5278-02029-1 * constellation : Cetus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 01 57 36.8683 DE: -10 27 08.598 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 01 57 36.8682 DE: -10 27 08.600 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (856) Backlunda asteroid class: approx. diameter [km]: 45 approx. diameter ["]: 0.033 distance from Earth [AU]: 1.86880 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): 0.018", 0.003", 72.923° remarks: * orbital elements for (856)Backlunda : Mean anomaly = 201.9597053315 deg Arg. of pericenter = 72.5110577889 deg Long. of node = 125.5202325720 deg Inclination = 14.3264984350 deg Eccentricity = 0.1187473098 Semimajor axis = 2.4354117552 AU Perihelion dist = 2.1462131611 AU Mag: H = 10.66, G = 0.15 Epoch of elements : MJD 60633.47339133 TDT (2024 Nov 19.4734) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#942023Apr24,4.73,2024,11,19,11.361433,0.033161,0.229567,-5.345174,0.766770,0.002363,0.002817,0.000001,0.000000 160.3104,-10.3302,5.95,-19.63,False TYC 5278-02029-1,1.96024119,-10.4523883,12.15,11.81,11.63,0.0,0,,1.98097897,-10.3302262,3.20,2.95,0,0,0 856,Backlunda,14.96,45.232,1.8688,0,0,-1.703,3.62,,2.6,0 0,201.8369,2024,11,19,72.5111,125.5202,14.3265,0.11875,2.43541,2.14621,10.66,5.0,0.15 1.236,0.0177,0.0026,73,0.0079,Known errors,0.97,0,-1,-1 20241119_2029-1,60140.70 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:55 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org