IOTA/IOTA-ES occultation update for (268) Adorea / TYC 5577-00378-1 event on 2023 Jan 12, 02:51 UT Visible from South Africa Summary ------- On 2023 Jan 12 UT, the 144.7 km diameter asteroid (268) Adorea will occult a 9.9 mag star in the constellation Libra for observers along a path across South Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.09 mag to 13.95 mag (the magnitude of the asteroid) for at most 4.930 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: 2023 Jan 12, 02:48 - 2023 Jan 12, 02:55 * geocentric midpoint of event [JD]: 2459956.61942617 * magnitude of target star: 9.89 * magnitude drop [mag]: 4.09 * estimated maximum duration [s]: 4.930 * Moon: 78 % sunlit, 55° distance * Sun: 68° distance * rough path description: South Africa The occultation path -------------------- * approximate projected width [km]: 160 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.023, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.024", 0.001", 108°) * approx speed of asteroid's shadow [km/s]: 29.3370 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5577-00378-1 by 268 Adorea on 2023 Jan 12 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 - 24 0 0 - 9 53 41 2 48 42.4 0 104 -55 -10 38 45 - 9 8 55 -10 40 40 - 9 7 1 .... - 23 0 0 -10 8 43 2 48 42.4 1 104 -54 -10 53 50 - 9 23 53 -10 55 46 - 9 21 59 0.37 - 22 0 0 -10 24 4 2 48 42.6 2 104 -53 -11 9 16 - 9 39 11 -11 11 12 - 9 37 16 0.42 - 21 0 0 -10 39 46 2 48 42.8 3 103 -53 -11 25 1 - 9 54 48 -11 26 57 - 9 52 54 0.44 - 20 0 0 -10 55 47 2 48 43.1 4 103 -52 -11 41 7 -10 10 45 -11 43 3 -10 8 51 0.45 - 19 0 0 -11 12 8 2 48 43.4 5 103 -51 -11 57 31 -10 27 2 -11 59 27 -10 25 7 0.46 - 18 0 0 -11 28 47 2 48 43.9 6 103 -50 -12 14 15 -10 43 38 -12 16 11 -10 41 43 0.46 - 17 0 0 -11 45 45 2 48 44.4 7 103 -50 -12 31 17 -11 0 32 -12 33 14 -10 58 37 0.46 - 16 0 0 -12 3 2 2 48 45.0 8 102 -49 -12 48 38 -11 17 44 -12 50 34 -11 15 49 0.47 - 15 0 0 -12 20 37 2 48 45.7 9 102 -48 -13 6 16 -11 35 15 -13 8 13 -11 33 20 0.47 - 14 0 0 -12 38 29 2 48 46.4 10 102 -47 -13 24 13 -11 53 3 -13 26 10 -11 51 8 0.47 - 13 0 0 -12 56 39 2 48 47.2 11 102 -46 -13 42 27 -12 11 9 -13 44 24 -12 9 13 0.47 - 12 0 0 -13 15 5 2 48 48.1 13 101 -45 -14 0 57 -12 29 32 -14 2 55 -12 27 36 0.47 - 11 0 0 -13 33 49 2 48 49.1 14 101 -45 -14 19 45 -12 48 11 -14 21 42 -12 46 15 0.47 - 10 0 0 -13 52 48 2 48 50.1 15 101 -44 -14 38 48 -13 7 6 -14 40 46 -13 5 10 0.47 - 9 0 0 -14 12 3 2 48 51.3 16 101 -43 -14 58 8 -13 26 18 -15 0 6 -13 24 21 0.47 - 8 0 0 -14 31 34 2 48 52.5 17 100 -42 -15 17 42 -13 45 45 -15 19 41 -13 43 48 0.47 - 7 0 0 -14 51 20 2 48 53.7 18 100 -41 -15 37 32 -14 5 26 -15 39 31 -14 3 30 0.48 - 6 0 0 -15 11 20 2 48 55.1 19 100 -40 -15 57 36 -14 25 23 -15 59 35 -14 23 26 0.48 - 5 0 0 -15 31 34 2 48 56.5 20 99 -39 -16 17 54 -14 45 33 -16 19 53 -14 43 36 0.48 - 4 0 0 -15 52 2 2 48 58.0 21 99 -38 -16 38 26 -15 5 57 -16 40 25 -15 4 0 0.48 - 3 0 0 -16 12 43 2 48 59.5 22 99 -37 -16 59 11 -15 26 35 -17 1 10 -15 24 37 0.48 - 2 0 0 -16 33 37 2 49 1.2 23 98 -37 -17 20 8 -15 47 25 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26.2 63 42 12 -36 7 25 -34 34 7 -36 9 25 -34 32 8 0.48 50 0 0 -35 39 45 2 51 29.5 63 40 13 -36 26 30 -34 53 19 -36 28 30 -34 51 21 0.48 51 0 0 -35 58 39 2 51 32.8 63 38 14 -36 45 21 -35 12 16 -36 47 20 -35 10 18 0.48 52 0 0 -36 17 19 2 51 36.1 64 36 15 -37 3 57 -35 30 59 -37 5 56 -35 29 2 0.48 53 0 0 -36 35 43 2 51 39.4 64 33 16 -37 22 17 -35 49 27 -37 24 17 -35 47 30 0.48 54 0 0 -36 53 52 2 51 42.7 64 31 17 -37 40 23 -36 7 40 -37 42 22 -36 5 43 0.48 55 0 0 -37 11 46 2 51 46.0 64 29 17 -37 58 12 -36 25 37 -38 0 11 -36 23 40 0.48 56 0 0 -37 29 23 2 51 49.2 64 26 18 -38 15 46 -36 43 19 -38 17 45 -36 41 22 0.48 57 0 0 -37 46 45 2 51 52.4 64 24 19 -38 33 4 -37 0 45 -38 35 3 -36 58 48 0.48 58 0 0 -38 3 51 2 51 55.7 64 21 20 -38 50 6 -37 17 54 -38 52 4 -37 15 58 0.48 59 0 0 -38 20 40 2 51 58.9 64 19 21 -39 6 51 -37 34 48 -39 8 49 -37 32 51 0.48 60 0 0 -38 37 13 2 52 2.1 64 17 22 -39 23 20 -37 51 25 -39 25 18 -37 49 28 0.48 61 0 0 -38 53 29 2 52 5.2 64 14 22 -39 39 32 -38 7 45 -39 41 30 -38 5 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33 -42 43 58 -41 13 59 -42 45 53 -41 12 5 0.48 75 0 0 -42 11 2 2 52 47.5 61 344 33 -42 56 6 -41 26 15 -42 58 1 -41 24 22 0.48 76 0 0 -42 22 56 2 52 50.3 60 342 34 -43 7 56 -41 38 14 -43 9 51 -41 36 20 0.48 77 0 0 -42 34 32 2 52 53.1 60 340 35 -43 19 28 -41 49 54 -43 21 23 -41 48 0 0.48 78 0 0 -42 45 51 2 52 55.9 59 339 36 -43 30 42 -42 1 16 -43 32 37 -41 59 23 0.48 79 0 0 -42 56 51 2 52 58.7 59 337 36 -43 41 39 -42 12 20 -43 43 33 -42 10 27 0.48 80 0 0 -43 7 34 2 53 1.4 59 335 37 -43 52 17 -42 23 7 -43 54 12 -42 21 13 0.48 81 0 0 -43 17 58 2 53 4.1 58 333 38 -44 2 38 -42 33 35 -44 4 33 -42 31 42 0.48 82 0 0 -43 28 5 2 53 6.8 58 332 39 -44 12 41 -42 43 45 -44 14 35 -42 41 52 0.48 83 0 0 -43 37 54 2 53 9.5 57 330 39 -44 22 26 -42 53 38 -44 24 20 -42 51 45 0.48 84 0 0 -43 47 24 2 53 12.1 57 329 40 -44 31 53 -43 3 12 -44 33 47 -43 1 19 0.48 85 0 0 -43 56 37 2 53 14.8 56 327 41 -44 41 3 -43 12 28 -44 42 57 -43 10 36 0.48 86 0 0 -44 5 32 2 53 17.3 56 326 41 -44 49 54 -43 21 27 -44 51 48 -43 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0.48 124 0 0 -46 7 22 2 54 36.3 32 284 63 -46 50 55 -45 24 4 -46 52 47 -45 22 14 0.48 125 0 0 -46 4 57 2 54 37.9 32 284 63 -46 48 31 -45 21 38 -46 50 23 -45 19 47 0.48 126 0 0 -46 2 14 2 54 39.4 31 283 64 -46 45 50 -45 18 54 -46 47 41 -45 17 3 0.48 127 0 0 -45 59 14 2 54 40.9 30 282 64 -46 42 51 -45 15 52 -46 44 43 -45 14 2 0.48 128 0 0 -45 55 57 2 54 42.4 30 281 64 -46 39 35 -45 12 34 -46 41 27 -45 10 43 0.48 129 0 0 -45 52 22 2 54 43.8 29 280 65 -46 36 2 -45 8 57 -46 37 54 -45 7 7 0.49 130 0 0 -45 48 30 2 54 45.3 28 279 65 -46 32 12 -45 5 4 -46 34 4 -45 3 13 0.49 131 0 0 -45 44 21 2 54 46.6 28 279 65 -46 28 5 -45 0 53 -46 29 57 -44 59 2 0.49 132 0 0 -45 39 55 2 54 48.0 27 278 65 -46 23 41 -44 56 25 -46 25 33 -44 54 34 0.49 133 0 0 -45 35 11 2 54 49.3 26 277 66 -46 18 59 -44 51 39 -46 20 51 -44 49 48 0.49 134 0 0 -45 30 10 2 54 50.7 25 276 66 -46 14 0 -44 46 36 -46 15 53 -44 44 45 0.49 135 0 0 -45 24 52 2 54 51.9 25 275 66 -46 8 44 -44 41 15 -46 10 37 -44 39 24 0.49 136 0 0 -45 19 16 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14 -44 35 53 -43 3 21 0.50 149 0 0 -43 40 6 2 55 6.4 15 265 66 -44 24 40 -42 55 48 -44 26 35 -42 53 55 0.50 150 0 0 -43 30 26 2 55 7.2 14 264 66 -44 15 4 -42 46 4 -44 16 58 -42 44 11 0.50 151 0 0 -43 20 28 2 55 8.0 13 264 66 -44 5 10 -42 36 3 -44 7 5 -42 34 10 0.50 152 0 0 -43 10 13 2 55 8.7 13 263 66 -43 54 59 -42 25 44 -43 56 54 -42 23 51 0.50 153 0 0 -42 59 41 2 55 9.4 12 262 65 -43 44 30 -42 15 8 -43 46 25 -42 13 15 0.50 154 0 0 -42 48 51 2 55 10.0 11 261 65 -43 33 44 -42 4 14 -43 35 39 -42 2 21 0.51 155 0 0 -42 37 43 2 55 10.6 10 261 65 -43 22 41 -41 53 3 -43 24 36 -41 51 10 0.51 156 0 0 -42 26 19 2 55 11.1 10 260 64 -43 11 20 -41 41 35 -43 13 15 -41 39 41 0.51 157 0 0 -42 14 37 2 55 11.7 9 259 64 -42 59 42 -41 29 49 -43 1 37 -41 27 55 0.51 158 0 0 -42 2 37 2 55 12.1 8 259 64 -42 47 46 -41 17 45 -42 49 42 -41 15 51 0.52 159 0 0 -41 50 20 2 55 12.6 7 258 63 -42 35 33 -41 5 24 -42 37 29 -41 3 30 0.52 160 0 0 -41 37 46 2 55 13.0 6 257 63 -42 23 4 -40 52 46 -42 25 0 -40 50 52 0.53 161 0 0 -41 24 55 2 55 13.3 6 257 62 -42 10 16 -40 39 51 -42 12 13 -40 37 57 0.53 162 0 0 -41 11 47 2 55 13.6 5 256 62 -41 57 12 -40 26 39 -41 59 8 -40 24 44 0.54 163 0 0 -40 58 21 2 55 13.9 4 255 62 -41 43 51 -40 13 9 -41 45 47 -40 11 14 0.55 164 0 0 -40 44 39 2 55 14.1 3 255 61 -41 30 12 -39 59 23 -41 32 9 -39 57 28 0.57 165 0 0 -40 30 39 2 55 14.3 3 254 60 -41 16 17 -39 45 20 -41 18 14 -39 43 24 0.60 166 0 0 -40 16 23 2 55 14.4 2 253 60 -41 2 5 -39 30 59 -41 4 2 -39 29 4 0.66 167 0 0 -40 1 50 2 55 14.5 1 253 59 -40 47 36 -39 16 22 -40 49 33 -39 14 27 0.83 168 0 0 -39 47 0 2 55 14.5 0 252 59 -40 32 50 .. .. .. -40 34 48 .. .. .. 3.82 Uncertainty in time = +/- 2 secs Prediction of 2022 Dec 1.1 Data for the target star ------------------------ * name: TYC 5577-00378-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 45 19.4971 DE: -13 37 18.504 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 45 19.4974 DE: -13 37 18.505 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (268) Adorea asteroid class: approx. diameter [km]: 145 approx. diameter ["]: 0.069 distance from Earth [AU]: 2.88460 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#75 date of fit: 2022 Nov 25 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): 0.024", 0.001", 107.785° remarks: * orbital elements for (268)Adorea : Mean anomaly = 10.5354650817 deg Arg. of pericenter = 68.3327513301 deg Long. of node = 120.8514453228 deg Inclination = 2.4402993697 deg Eccentricity = 0.1367532001 Semimajor axis = 3.0938255976 AU Perihelion dist = 2.6707350467 AU Mag: H = 8.51, G = 0.15 Epoch of elements : MJD 59956.11937500 TDT (2023 Jan 12.1194) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#752022Nov25,4.93,2023,1,12,2.866228,-0.115333,-0.414601,15.960786,-4.409275,-0.005200,0.001709,-0.000001,0.000000 67.2997,-13.7178,139.02,-21.70,False TYC 5577-00378-1,14.75541584,-13.6218064,0.00,9.89,0.00,0.0,0,,14.77611771,-13.7178380,4.08,0.00,0,0,0 268,Adorea,13.95,144.7,2.8846,0,0,3.340,-13.44,,7.8,0 0,10.5138,2023,1,12,68.3328,120.8514,2.4403,0.13675,3.09383,2.67074,8.51,5.0,0.15 1.021,0.0237,0.0011,108,0.0015,Known errors,-1.00,-1,-1,-1 20230112_0378-1,59914.09 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 01, 02:11 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org