IOTA/IOTA-ES occultation update for (204) Kallisto / UCAC4 512-031862 event on 2024 Nov 28, 14:20 UT Visible from Summary ------- On 2024 Nov 28 UT, the 49.052 km diameter asteroid (204) Kallisto will occult a 11.1 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.87 mag to 13.91 mag (the magnitude of the asteroid) for at most 5.060 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 28, 14:09 - 2024 Nov 28, 14:31 * geocentric midpoint of event [JD]: 2460643.09744109 * magnitude of target star: 11.12 * magnitude drop [mag]: 2.87 * estimated maximum duration [s]: 5.060 * Moon: 7 % sunlit, 111° distance * Sun: 141° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 51 * 1 sigma uncertainty interval [path widths]: +/- 0.14 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.001", 96°) * approx speed of asteroid's shadow [km/s]: 9.6886 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 512-031862 by 204 Kallisto on 2024 Nov 28 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 96 0 0 .. .. .... .. .. .. .. .. .. -30 16 49 .. .. .. -30 12 48 .. .. .. .... 97 0 0 -30 17 42 14 30 53.9 1 75 -24 -30 3 27 -30 31 57 -29 59 27 -30 35 58 .... 98 0 0 -30 4 5 14 30 53.7 2 75 -25 -29 49 49 -30 18 21 -29 45 49 -30 22 23 0.16 99 0 0 -29 50 11 14 30 53.3 3 74 -26 -29 35 55 -30 4 29 -29 31 54 -30 8 31 0.20 100 0 0 -29 36 2 14 30 52.7 4 74 -27 -29 21 45 -29 50 20 -29 17 43 -29 54 22 0.22 101 0 0 -29 21 36 14 30 52.0 4 73 -27 -29 7 18 -29 35 56 -29 3 16 -29 39 58 0.23 102 0 0 -29 6 55 14 30 51.0 5 73 -28 -28 52 35 -29 21 15 -28 48 33 -29 25 18 0.24 103 0 0 -28 51 57 14 30 50.0 6 72 -29 -28 37 37 -29 6 19 -28 33 34 -29 10 22 0.24 104 0 0 -28 36 44 14 30 48.7 7 72 -30 -28 22 23 -28 51 7 -28 18 20 -28 55 10 0.25 105 0 0 -28 21 16 14 30 47.3 8 71 -30 -28 6 54 -28 35 40 -28 2 51 -28 39 43 0.25 106 0 0 -28 5 33 14 30 45.6 9 71 -31 -27 51 10 -28 19 57 -27 47 6 -28 24 1 0.25 107 0 0 -27 49 35 14 30 43.9 10 70 -32 -27 35 10 -28 4 0 -27 31 7 -28 8 4 0.26 108 0 0 -27 33 22 14 30 41.9 11 70 -32 -27 18 56 -27 47 48 -27 14 53 -27 51 53 0.26 109 0 0 -27 16 54 14 30 39.8 12 69 -33 -27 2 28 -27 31 22 -26 58 24 -27 35 27 0.26 110 0 0 -27 0 13 14 30 37.4 13 69 -34 -26 45 45 -27 14 41 -26 41 41 -27 18 46 0.26 111 0 0 -26 43 17 14 30 34.9 14 69 -35 -26 28 49 -26 57 46 -26 24 44 -27 1 52 0.26 112 0 0 -26 26 8 14 30 32.2 15 68 -35 -26 11 39 -26 40 38 -26 7 34 -26 44 43 0.26 113 0 0 -26 8 45 14 30 29.4 15 68 -36 -25 54 15 -26 23 16 -25 50 10 -26 27 22 0.27 114 0 0 -25 51 9 14 30 26.3 16 67 -37 -25 36 38 -26 5 41 -25 32 33 -26 9 47 0.27 115 0 0 -25 33 20 14 30 23.1 17 67 -37 -25 18 48 -25 47 53 -25 14 43 -25 51 59 0.27 116 0 0 -25 15 19 14 30 19.7 18 66 -38 -25 0 46 -25 29 52 -24 56 40 -25 33 59 0.27 117 0 0 -24 57 5 14 30 16.1 19 66 -39 -24 42 32 -25 11 39 -24 38 26 -25 15 46 0.27 118 0 0 -24 38 39 14 30 12.3 20 65 -39 -24 24 5 -24 53 14 -24 19 59 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41 0.27 -128 0 0 5 9 22 14 12 35.0 41 282 -4 5 23 8 4 55 35 5 27 1 4 51 41 0.27 -127 0 0 5 11 1 14 12 27.5 40 282 -3 5 24 47 4 57 14 5 28 40 4 53 21 0.27 -126 0 0 5 12 19 14 12 20.1 40 282 -2 5 26 5 4 58 32 5 29 58 4 54 39 0.27 -125 0 0 5 13 16 14 12 12.9 39 282 -1 5 27 2 4 59 29 5 30 55 4 55 36 0.27 -124 0 0 5 13 52 14 12 5.8 38 281 0 5 27 38 5 0 5 5 31 31 4 56 12 0.27 -123 0 0 5 14 7 14 11 58.8 37 281 1 5 27 53 5 0 20 5 31 45 4 56 27 0.27 -122 0 0 5 14 0 14 11 52.0 36 281 2 5 27 46 5 0 13 5 31 39 4 56 20 0.27 -121 0 0 5 13 32 14 11 45.4 35 281 3 5 27 18 4 59 45 5 31 11 4 55 52 0.27 -120 0 0 5 12 43 14 11 38.9 34 281 4 5 26 30 4 58 56 5 30 22 4 55 3 0.27 -119 0 0 5 11 33 14 11 32.5 33 281 4 5 25 19 4 57 46 5 29 12 4 53 52 0.27 -118 0 0 5 10 1 14 11 26.4 32 281 5 5 23 48 4 56 14 5 27 41 4 52 20 0.27 -117 0 0 5 8 8 14 11 20.3 31 281 6 5 21 55 4 54 21 5 25 48 4 50 27 0.27 -116 0 0 5 5 54 14 11 14.5 30 281 7 5 19 41 4 52 6 5 23 34 4 48 12 0.27 -115 0 0 5 3 18 14 11 8.8 29 281 8 5 17 5 4 49 30 5 20 58 4 45 36 0.27 -114 0 0 5 0 20 14 11 3.2 28 281 9 5 14 8 4 46 32 5 18 1 4 42 38 0.27 -113 0 0 4 57 1 14 10 57.8 27 281 10 5 10 49 4 43 13 5 14 43 4 39 19 0.27 -112 0 0 4 53 21 14 10 52.6 26 281 11 5 7 9 4 39 32 5 11 3 4 35 38 0.27 -111 0 0 4 49 19 14 10 47.6 25 281 12 5 3 8 4 35 30 5 7 1 4 31 36 0.27 -110 0 0 4 44 56 14 10 42.7 24 281 13 4 58 45 4 31 6 5 2 38 4 27 12 0.27 -109 0 0 4 40 11 14 10 38.1 23 281 14 4 54 0 4 26 20 4 57 54 4 22 26 0.28 -108 0 0 4 35 4 14 10 33.5 22 281 15 4 48 54 4 21 13 4 52 48 4 17 19 0.28 -107 0 0 4 29 36 14 10 29.2 21 281 15 4 43 27 4 15 45 4 47 21 4 11 50 0.28 -106 0 0 4 23 47 14 10 25.0 20 281 16 4 37 38 4 9 55 4 41 32 4 6 0 0.28 -105 0 0 4 17 36 14 10 21.1 19 282 17 4 31 27 4 3 43 4 35 22 3 59 48 0.28 -104 0 0 4 11 3 14 10 17.3 18 282 18 4 24 55 3 57 10 4 28 50 3 53 15 0.28 -103 0 0 4 4 9 14 10 13.7 17 282 19 4 18 2 3 50 15 4 21 56 3 46 20 0.28 -102 0 0 3 56 53 14 10 10.3 16 282 20 4 10 47 3 42 59 4 14 42 3 39 3 0.28 -101 0 0 3 49 16 14 10 7.0 15 282 21 4 3 10 3 35 21 4 7 6 3 31 26 0.28 -100 0 0 3 41 18 14 10 4.0 14 282 22 3 55 13 3 27 22 3 59 8 3 23 26 0.28 - 99 0 0 3 32 58 14 10 1.2 13 282 23 3 46 54 3 19 1 3 50 49 3 15 5 0.28 - 98 0 0 3 24 17 14 9 58.5 12 282 24 3 38 13 3 10 19 3 42 9 3 6 23 0.28 - 97 0 0 3 15 14 14 9 56.1 11 282 25 3 29 11 3 1 16 3 33 7 2 57 20 0.28 - 96 0 0 3 5 50 14 9 53.8 10 282 26 3 19 48 2 51 52 3 23 45 2 47 55 0.28 - 95 0 0 2 56 5 14 9 51.8 9 282 27 3 10 4 2 42 6 3 14 1 2 38 9 0.28 - 94 0 0 2 45 59 14 9 49.9 8 282 28 2 59 59 2 31 59 3 3 56 2 28 1 0.28 - 93 0 0 2 35 32 14 9 48.3 7 282 29 2 49 33 2 21 31 2 53 30 2 17 33 0.29 - 92 0 0 2 24 44 14 9 46.9 6 282 30 2 38 45 2 10 41 2 42 42 2 6 44 0.29 - 91 0 0 2 13 35 14 9 45.6 5 282 31 2 27 37 1 59 31 2 31 34 1 55 33 0.29 - 90 0 0 2 2 5 14 9 44.6 4 282 32 2 16 8 1 48 0 2 20 6 1 44 2 0.29 - 89 0 0 1 50 14 14 9 43.8 3 282 33 2 4 18 1 36 9 2 8 16 1 32 10 0.30 - 88 0 0 1 38 3 14 9 43.2 2 282 34 1 52 8 1 23 56 1 56 6 1 19 58 0.31 - 87 0 0 1 25 31 14 9 42.8 1 282 35 1 39 37 1 11 23 1 43 36 1 7 24 0.33 - 86 0 0 1 12 39 14 9 42.7 0 282 36 1 26 46 0 58 30 1 30 45 0 54 31 0.52 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 512-031862 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 56 12.0315 DE: +12 17 34.368 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 56 12.0317 DE: +12 17 34.367 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.1 * B mag [mag]: 11.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (204) Kallisto asteroid class: approx. diameter [km]: 49 approx. diameter ["]: 0.029 distance from Earth [AU]: 2.29630 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 date of fit: 2023 Feb 11 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): 0.011", 0.001", 96.052° remarks: * orbital elements for (204)Kallisto : Mean anomaly = 196.0377778990 deg Arg. of pericenter = 56.5692569482 deg Long. of node = 204.9734591653 deg Inclination = 8.2708664036 deg Eccentricity = 0.1751030466 Semimajor axis = 2.6729878950 AU Perihelion dist = 2.2049395711 AU Mag: H = 8.93, G = 0.15 Epoch of elements : MJD 60642.59744417 TDT (2024 Nov 28.5974) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Feb11,5.06,2024,11,28,14.338586,0.071544,-0.248341,-5.252782,-1.520857,-0.003569,0.001234,0.000001,0.000000 -178.6519,12.2614,-38.04,-21.45,False UCAC4 512-031862,6.93667541,12.2928801,11.44,11.12,10.95,0.0,0,,6.96018658,12.2613777,2.87,2.62,0,0,0 204,Kallisto,13.91,49.052,2.2963,0,0,-1.372,-5.83,,2.4,0 0,195.9030,2024,11,28,56.5693,204.9735,8.2709,0.17510,2.67299,2.20494,8.93,5.0,0.15 1.141,0.0107,0.0011,96,0.0042,Known errors,0.91,0,-1,-1 20241128_031862,60140.72 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org