IOTA/IOTA-ES occultation update for (5) Astraea / UCAC4-529-030640 event on 2023 Dec 06, 02:57 UT Visible from Africa, South America Summary ------- On 2023 Dec 06 UT, the 108 km diameter asteroid (5) Astraea will occult a 12.4 mag star in the constellation Gemini for observers along a path across Africa, South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.12 mag to 10.05 mag (the magnitude of the asteroid) for at most 18.160 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 Dec 06, 02:40 - 2023 Dec 06, 03:15 * geocentric midpoint of event [JD]: 2460284.62377255 * magnitude of target star: 12.42 * magnitude drop [mag]: 0.12 * estimated maximum duration [s]: 18.160 * Moon: 41 % sunlit, 74° distance * Sun: 152° distance * rough path description: Africa, South America Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 114 * 1 sigma uncertainty interval [path widths]: +/- 0.01 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.002", 90°) * approx speed of asteroid's shadow [km/s]: 5.9458 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-529-030640 by 5 Astraea on 2023 Dec 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 -108 0 0 -15 4 9 3 15 9.0 0 74 -23 -14 31 43 -15 36 41 -14 30 46 -15 37 39 .... -107 0 0 -14 47 8 3 15 8.8 1 73 -24 -14 14 44 -15 19 39 -14 13 46 -15 20 37 0.13 -106 0 0 -14 30 13 3 15 8.1 2 73 -25 -13 57 50 -15 2 42 -13 56 52 -15 3 41 0.24 -105 0 0 -14 13 24 3 15 7.2 3 73 -26 -13 41 2 -14 45 53 -13 40 5 -14 46 51 0.27 -104 0 0 -13 56 42 3 15 5.9 4 73 -27 -13 24 22 -14 29 10 -13 23 24 -14 30 8 0.29 -103 0 0 -13 40 8 3 15 4.2 5 72 -28 -13 7 48 -14 12 33 -13 6 51 -14 13 32 0.31 -102 0 0 -13 23 40 3 15 2.2 6 72 -29 -12 51 23 -13 56 5 -12 50 25 -13 57 3 0.32 -101 0 0 -13 7 21 3 14 59.9 7 72 -30 -12 35 4 -13 39 44 -12 34 7 -13 40 42 0.32 -100 0 0 -12 51 9 3 14 57.2 8 72 -31 -12 18 54 -13 23 31 -12 17 57 -13 24 29 0.33 - 99 0 0 -12 35 6 3 14 54.2 9 71 -31 -12 2 53 -13 7 26 -12 1 55 -13 8 24 0.33 - 98 0 0 -12 19 12 3 14 50.9 10 71 -32 -11 47 0 -12 51 30 -11 46 2 -12 52 28 0.33 - 97 0 0 -12 3 26 3 14 47.2 11 71 -33 -11 31 15 -12 35 43 -11 30 18 -12 36 41 0.34 - 96 0 0 -11 47 50 3 14 43.1 12 71 -34 -11 15 41 -12 20 5 -11 14 43 -12 21 3 0.34 - 95 0 0 -11 32 23 3 14 38.8 13 71 -35 -11 0 15 -12 4 37 -10 59 18 -12 5 35 0.34 - 94 0 0 -11 17 6 3 14 34.1 14 70 -36 -10 45 0 -11 49 18 -10 44 3 -11 50 16 0.34 - 93 0 0 -11 1 59 3 14 29.1 15 70 -37 -10 29 55 -11 34 10 -10 28 57 -11 35 8 0.34 - 92 0 0 -10 47 2 3 14 23.8 16 70 -38 -10 15 0 -11 19 12 -10 14 2 -11 20 9 0.34 - 91 0 0 -10 32 16 3 14 18.2 17 70 -39 -10 0 15 -11 4 24 - 9 59 18 -11 5 21 0.34 - 90 0 0 -10 17 41 3 14 12.2 18 70 -40 - 9 45 41 -10 49 47 - 9 44 44 -10 50 44 0.34 - 89 0 0 -10 3 17 3 14 6.0 19 69 -41 - 9 31 19 -10 35 21 - 9 30 22 -10 36 18 0.34 - 88 0 0 - 9 49 4 3 13 59.4 20 69 -41 - 9 17 7 -10 21 6 - 9 16 10 -10 22 4 0.35 - 87 0 0 - 9 35 2 3 13 52.5 21 69 -42 - 9 3 8 -10 7 3 - 9 2 11 -10 8 0 0.35 - 86 0 0 - 9 21 12 3 13 45.4 22 69 -43 - 8 49 19 - 9 53 12 - 8 48 22 - 9 54 9 0.35 - 85 0 0 - 9 7 34 3 13 37.9 23 68 -44 - 8 35 43 - 9 39 32 - 8 34 46 - 9 40 29 0.35 - 84 0 0 - 8 54 8 3 13 30.2 24 68 -45 - 8 22 19 - 9 26 4 - 8 21 22 - 9 27 2 0.35 - 83 0 0 - 8 40 55 3 13 22.1 25 68 -46 - 8 9 7 - 9 12 49 - 8 8 10 - 9 13 46 0.35 - 82 0 0 - 8 27 54 3 13 13.8 26 68 -46 - 7 56 8 - 8 59 47 - 7 55 11 - 9 0 44 0.35 - 81 0 0 - 8 15 6 3 13 5.2 27 68 -47 - 7 43 21 - 8 46 57 - 7 42 24 - 8 47 54 0.35 - 80 0 0 - 8 2 30 3 12 56.3 28 67 -48 - 7 30 47 - 8 34 19 - 7 29 50 - 8 35 16 0.35 - 79 0 0 - 7 50 7 3 12 47.1 29 67 -49 - 7 18 26 - 8 21 55 - 7 17 30 - 8 22 52 0.35 - 78 0 0 - 7 37 58 3 12 37.7 30 67 -50 - 7 6 18 - 8 9 44 - 7 5 22 - 8 10 41 0.35 - 77 0 0 - 7 26 2 3 12 28.0 31 67 -50 - 6 54 24 - 7 57 46 - 6 53 28 - 7 58 43 0.35 - 76 0 0 - 7 14 20 3 12 18.0 32 66 -51 - 6 42 43 - 7 46 2 - 6 41 47 - 7 46 59 0.35 - 75 0 0 - 7 2 51 3 12 7.8 33 66 -52 - 6 31 16 - 7 34 32 - 6 30 20 - 7 35 29 0.35 - 74 0 0 - 6 51 36 3 11 57.4 34 66 -53 - 6 20 2 - 7 23 15 - 6 19 6 - 7 24 12 0.35 - 73 0 0 - 6 40 34 3 11 46.7 35 66 -53 - 6 9 3 - 7 12 12 - 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3 19 59 - 2 17 8 - 3 20 55 0.34 - 35 0 0 - 2 47 41 3 2 41.6 66 39 -62 - 2 16 46 - 3 18 42 - 2 15 51 - 3 19 37 0.34 - 34 0 0 - 2 46 39 3 2 24.8 67 37 -61 - 2 15 44 - 3 17 40 - 2 14 49 - 3 18 35 0.34 - 33 0 0 - 2 45 54 3 2 7.9 67 36 -61 - 2 14 59 - 3 16 54 - 2 14 4 - 3 17 50 0.34 - 32 0 0 - 2 45 24 3 1 51.0 68 34 -60 - 2 14 29 - 3 16 24 - 2 13 34 - 3 17 20 0.34 - 31 0 0 - 2 45 10 3 1 34.0 68 32 -60 - 2 14 16 - 3 16 10 - 2 13 21 - 3 17 6 0.34 - 30 0 0 - 2 45 12 3 1 16.9 69 30 -59 - 2 14 18 - 3 16 13 - 2 13 23 - 3 17 8 0.34 - 29 0 0 - 2 45 31 3 0 59.8 69 28 -59 - 2 14 36 - 3 16 31 - 2 13 41 - 3 17 26 0.34 - 28 0 0 - 2 46 5 3 0 42.7 69 25 -58 - 2 15 10 - 3 17 5 - 2 14 15 - 3 18 0 0.34 - 27 0 0 - 2 46 54 3 0 25.5 70 23 -58 - 2 16 0 - 3 17 55 - 2 15 5 - 3 18 50 0.34 - 26 0 0 - 2 48 0 3 0 8.2 70 21 -57 - 2 17 5 - 3 19 1 - 2 16 10 - 3 19 56 0.34 - 25 0 0 - 2 49 22 2 59 51.0 70 18 -57 - 2 18 27 - 3 20 23 - 2 17 32 - 3 21 18 0.34 - 24 0 0 - 2 50 59 2 59 33.7 71 16 -56 - 2 20 4 - 3 22 0 - 2 19 9 - 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11 0 0 - 3 35 53 2 55 48.4 70 341 -47 - 3 4 51 - 4 7 0 - 3 3 56 - 4 7 56 0.34 - 10 0 0 - 3 41 8 2 55 31.2 69 339 -46 - 3 10 6 - 4 12 17 - 3 9 10 - 4 13 13 0.34 - 9 0 0 - 3 46 39 2 55 14.0 69 337 -45 - 3 15 36 - 4 17 48 - 3 14 40 - 4 18 44 0.34 - 8 0 0 - 3 52 25 2 54 56.9 68 334 -44 - 3 21 21 - 4 23 35 - 3 20 25 - 4 24 31 0.34 - 7 0 0 - 3 58 26 2 54 39.8 68 332 -44 - 3 27 21 - 4 29 37 - 3 26 26 - 4 30 33 0.34 - 6 0 0 - 4 4 43 2 54 22.7 67 331 -43 - 3 33 37 - 4 35 54 - 3 32 41 - 4 36 50 0.34 - 5 0 0 - 4 11 14 2 54 5.8 67 329 -42 - 3 40 7 - 4 42 27 - 3 39 11 - 4 43 23 0.34 - 4 0 0 - 4 18 0 2 53 48.9 66 327 -41 - 3 46 52 - 4 49 14 - 3 45 56 - 4 50 10 0.34 - 3 0 0 - 4 25 1 2 53 32.0 65 325 -40 - 3 53 52 - 4 56 16 - 3 52 56 - 4 57 12 0.34 - 2 0 0 - 4 32 17 2 53 15.2 65 324 -40 - 4 1 7 - 5 3 33 - 4 0 11 - 5 4 29 0.34 - 1 0 0 - 4 39 47 2 52 58.5 64 322 -39 - 4 8 36 - 5 11 4 - 4 7 40 - 5 12 0 0.34 - 0 0 0 - 4 47 32 2 52 41.9 63 321 -38 - 4 16 20 - 5 18 51 - 4 15 24 - 5 19 47 0.34 1 0 0 - 4 55 32 2 52 25.4 63 320 -37 - 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8 57 1 -10 0 46 - 8 56 5 -10 1 43 0.35 27 0 0 - 9 42 26 2 46 1.7 41 301 -14 - 9 10 36 -10 14 23 - 9 9 39 -10 15 20 0.36 28 0 0 - 9 56 13 2 45 49.4 40 300 -13 - 9 24 21 -10 28 11 - 9 23 24 -10 29 9 0.36 29 0 0 -10 10 10 2 45 37.2 39 300 -12 - 9 38 17 -10 42 10 - 9 37 20 -10 43 8 0.36 30 0 0 -10 24 18 2 45 25.3 38 300 -11 - 9 52 23 -10 56 20 - 9 51 26 -10 57 17 0.36 31 0 0 -10 38 36 2 45 13.6 37 299 -10 -10 6 39 -11 10 39 -10 5 42 -11 11 37 0.36 32 0 0 -10 53 4 2 45 2.2 36 299 -9 -10 21 6 -11 25 8 -10 20 9 -11 26 6 0.36 33 0 0 -11 7 41 2 44 51.0 35 299 -8 -10 35 42 -11 39 47 -10 34 44 -11 40 45 0.36 34 0 0 -11 22 28 2 44 40.0 34 298 -7 -10 50 27 -11 54 36 -10 49 30 -11 55 33 0.36 35 0 0 -11 37 24 2 44 29.3 34 298 -6 -11 5 22 -12 9 33 -11 4 25 -12 10 31 0.36 36 0 0 -11 52 29 2 44 18.9 33 298 -5 -11 20 25 -12 24 40 -11 19 28 -12 25 38 0.36 37 0 0 -12 7 43 2 44 8.7 32 297 -4 -11 35 38 -12 39 55 -11 34 41 -12 40 53 0.36 38 0 0 -12 23 6 2 43 58.7 31 297 -3 -11 50 59 -12 55 19 -11 50 1 -12 56 17 0.36 39 0 0 -12 38 36 2 43 49.1 30 297 -2 -12 6 28 -13 10 51 -12 5 30 -13 11 49 0.36 40 0 0 -12 54 15 2 43 39.7 29 296 -1 -12 22 5 -13 26 31 -12 21 7 -13 27 29 0.36 41 0 0 -13 10 1 2 43 30.5 28 296 0 -12 37 50 -13 42 18 -12 36 52 -13 43 16 0.36 42 0 0 -13 25 54 2 43 21.7 27 296 1 -12 53 42 -13 58 13 -12 52 44 -13 59 11 0.36 43 0 0 -13 41 55 2 43 13.1 26 295 2 -13 9 41 -14 14 15 -13 8 44 -14 15 13 0.36 44 0 0 -13 58 2 2 43 4.9 25 295 3 -13 25 47 -14 30 24 -13 24 50 -14 31 22 0.36 45 0 0 -14 14 16 2 42 56.9 24 295 4 -13 42 0 -14 46 39 -13 41 2 -14 47 37 0.36 46 0 0 -14 30 36 2 42 49.2 23 294 5 -13 58 19 -15 3 0 -13 57 21 -15 3 58 0.36 47 0 0 -14 47 2 2 42 41.8 22 294 6 -14 14 44 -15 19 27 -14 13 46 -15 20 25 0.36 48 0 0 -15 3 34 2 42 34.7 21 294 7 -14 31 14 -15 36 0 -14 30 16 -15 36 58 0.36 49 0 0 -15 20 10 2 42 27.9 20 294 7 -14 47 50 -15 52 38 -14 46 52 -15 53 36 0.36 50 0 0 -15 36 52 2 42 21.4 19 293 8 -15 4 31 -16 9 21 -15 3 33 -16 10 19 0.36 51 0 0 -15 53 39 2 42 15.2 18 293 9 -15 21 16 -16 26 8 -15 20 19 -16 27 6 0.37 52 0 0 -16 10 30 2 42 9.4 17 293 10 -15 38 6 -16 43 0 -15 37 8 -16 43 58 0.37 53 0 0 -16 27 25 2 42 3.8 16 292 11 -15 55 0 -16 59 56 -15 54 2 -17 0 54 0.37 54 0 0 -16 44 23 2 41 58.6 15 292 12 -16 11 58 -17 16 55 -16 11 0 -17 17 53 0.37 55 0 0 -17 1 25 2 41 53.6 14 292 13 -16 28 59 -17 33 57 -16 28 1 -17 34 56 0.37 56 0 0 -17 18 29 2 41 49.0 13 291 14 -16 46 3 -17 51 3 -16 45 5 -17 52 1 0.37 57 0 0 -17 35 37 2 41 44.7 12 291 15 -17 3 9 -18 8 11 -17 2 11 -18 9 9 0.37 58 0 0 -17 52 46 2 41 40.8 11 291 16 -17 20 18 -18 25 21 -17 19 20 -18 26 19 0.37 59 0 0 -18 9 58 2 41 37.1 10 290 17 -17 37 29 -18 42 33 -17 36 31 -18 43 32 0.37 60 0 0 -18 27 11 2 41 33.8 9 290 18 -17 54 42 -18 59 47 -17 53 44 -19 0 45 0.37 61 0 0 -18 44 25 2 41 30.8 8 290 19 -18 11 55 -19 17 1 -18 10 57 -19 18 0 0.37 62 0 0 -19 1 40 2 41 28.2 7 290 20 -18 29 10 -19 34 17 -18 28 12 -19 35 15 0.37 63 0 0 -19 18 55 2 41 25.9 6 289 21 -18 46 25 -19 51 32 -18 45 27 -19 52 31 0.37 64 0 0 -19 36 11 2 41 23.9 5 289 22 -19 3 40 -20 8 48 -19 2 42 -20 9 47 0.38 65 0 0 -19 53 26 2 41 22.2 4 289 23 -19 20 55 -20 26 4 -19 19 57 -20 27 2 0.38 66 0 0 -20 10 41 2 41 20.8 4 288 24 -19 38 10 -20 43 18 -19 37 12 -20 44 17 0.38 67 0 0 -20 27 54 2 41 19.8 3 288 25 -19 55 23 -21 0 32 -19 54 25 -21 1 31 0.39 68 0 0 -20 45 6 2 41 19.2 2 287 26 -20 12 36 -21 17 44 -20 11 38 -21 18 43 0.40 69 0 0 -21 2 17 2 41 18.8 1 287 27 -20 29 46 -21 34 55 -20 28 48 -21 35 53 0.47 Uncertainty in time = +/- 1 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: UCAC4-529-030640 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 41 52.2734 DE: +15 46 57.894 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 41 52.2734 DE: +15 46 57.894 * 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: (5) Astraea asteroid class: approx. diameter [km]: 108 approx. diameter ["]: 0.114 distance from Earth [AU]: 1.30940 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#134 date of fit: 2023 Oct 12 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): 0.008", 0.002", 89.967° remarks: * orbital elements for (5)Astraea : Mean anomaly = 323.3905176204 deg Arg. of pericenter = 359.1984758878 deg Long. of node = 141.4625489630 deg Inclination = 5.3589078337 deg Eccentricity = 0.1873324500 Semimajor axis = 2.5762829964 AU Perihelion dist = 2.0936615908 AU Mag: H = 7.00, G = 0.15 Epoch of elements : MJD 60284.12333333 TDT (2023 Dec 06.1233) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1342023Oct12,18.16,2023,12,6,2.970541,-0.017635,-0.321741,-3.350932,0.184087,-0.002527,0.000832,0.000001,0.000000 -18.3893,15.7604,133.13,-22.44,False UCAC4-529-030640,6.69785371,15.7827484,0.00,12.42,0.00,0.0,0,,6.72098858,15.7604375,0.12,0.00,0,0,0 5,Astraea,10.05,108.000,1.3094,0,0,-1.560,1.24,,5.6,0 0,323.3611,2023,12,6,359.1985,141.4625,5.3589,0.18733,2.57628,2.09366,7.00,5.0,0.15 1.015,0.0080,0.0016,90,0.0082,Known errors,-1.00,0,-1,-1 20231206_030640,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:13 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org