IOTA/IOTA-ES occultation update for (2156) Kate / TYC 6856-01252-1 event on 2024 Oct 02, 12:32 UT Visible from Summary ------- On 2024 Oct 02 UT, the 8.455 km diameter asteroid (2156) Kate will occult a 10.6 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.37 mag to 16.92 mag (the magnitude of the asteroid) for at most 0.430 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: 97 * date and approx. time of event: 2024 Oct 02, 12:27 - 2024 Oct 02, 12:37 * geocentric midpoint of event [JD]: 2460586.02283646 * magnitude of target star: 10.55 * magnitude drop [mag]: 6.37 * estimated maximum duration [s]: 0.430 * Moon: 0 % sunlit, 88° distance * Sun: 85° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 9 * 1 sigma uncertainty interval [path widths]: +/- 0.39 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.002", 90°) * approx speed of asteroid's shadow [km/s]: 19.8721 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6856-01252-1 by 2156 Kate on 2024 Oct 2 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 - 5 0 0 12 49 32 12 28 0.9 1 120 73 12 46 39 12 52 25 12 44 23 12 54 40 .... - 4 0 0 12 16 15 12 28 1.1 2 120 73 12 13 22 12 19 7 12 11 7 12 21 23 -0.24 - 3 0 0 11 43 17 12 28 1.4 3 120 73 11 40 25 11 46 9 11 38 10 11 48 24 -0.31 - 2 0 0 11 10 39 12 28 1.9 4 121 73 11 7 48 11 13 31 11 5 33 11 15 45 -0.35 - 1 0 0 10 38 22 12 28 2.4 6 121 73 10 35 31 10 41 13 10 33 17 10 43 27 -0.37 0 0 0 10 6 26 12 28 3.2 7 121 73 10 3 36 10 9 17 10 1 22 10 11 31 -0.38 1 0 0 9 34 53 12 28 4.0 8 121 73 9 32 3 9 37 44 9 29 50 9 39 57 -0.39 2 0 0 9 3 44 12 28 5.0 9 121 73 9 0 54 9 6 33 8 58 41 9 8 46 -0.40 3 0 0 8 32 58 12 28 6.1 10 122 72 8 30 9 8 35 47 8 27 57 8 38 0 -0.40 4 0 0 8 2 37 12 28 7.4 11 122 72 7 59 49 8 5 26 7 57 37 8 7 38 -0.41 5 0 0 7 32 42 12 28 8.8 12 122 71 7 29 54 7 35 30 7 27 43 7 37 42 -0.41 6 0 0 7 3 14 12 28 10.3 13 122 71 7 0 26 7 6 1 6 58 15 7 8 12 -0.41 7 0 0 6 34 12 12 28 11.9 14 122 70 6 31 25 6 36 59 6 29 14 6 39 10 -0.42 8 0 0 6 5 38 12 28 13.7 15 122 70 6 2 51 6 8 24 6 0 41 6 10 35 -0.42 9 0 0 5 37 32 12 28 15.5 17 122 69 5 34 46 5 40 18 5 32 36 5 42 28 -0.42 10 0 0 5 9 55 12 28 17.5 18 123 68 5 7 9 5 12 40 5 5 0 5 14 50 -0.42 11 0 0 4 42 47 12 28 19.6 19 123 68 4 40 2 4 45 32 4 37 53 4 47 41 -0.42 12 0 0 4 16 9 12 28 21.9 20 123 67 4 13 25 4 18 54 4 11 16 4 21 3 -0.43 13 0 0 3 50 2 12 28 24.2 21 123 66 3 47 18 3 52 46 3 45 10 3 54 54 -0.43 14 0 0 3 24 25 12 28 26.7 22 123 65 3 21 42 3 27 9 3 19 34 3 29 17 -0.43 15 0 0 2 59 20 12 28 29.3 23 123 64 2 56 37 3 2 3 2 54 30 3 4 11 -0.43 16 0 0 2 34 47 12 28 31.9 24 123 63 2 32 4 2 37 29 2 29 57 2 39 36 -0.43 17 0 0 2 10 45 12 28 34.7 25 124 62 2 8 3 2 13 27 2 5 57 2 15 34 -0.43 18 0 0 1 47 16 12 28 37.6 26 124 62 1 44 35 1 49 58 1 42 28 1 52 4 -0.43 19 0 0 1 24 20 12 28 40.6 27 124 61 1 21 39 1 27 1 1 19 33 1 29 7 -0.43 20 0 0 1 1 57 12 28 43.7 28 124 60 0 59 16 1 4 37 0 57 11 1 6 43 -0.43 21 0 0 0 40 7 12 28 46.9 29 124 59 0 37 27 0 42 47 0 35 22 0 44 53 -0.44 22 0 0 0 18 51 12 28 50.2 30 124 58 0 16 12 0 21 31 0 14 7 0 23 36 -0.44 23 0 0 - 0 1 51 12 28 53.6 31 125 57 - 0 4 30 0 0 48 - 0 6 35 0 2 53 -0.44 24 0 0 - 0 21 59 12 28 57.1 33 125 56 - 0 24 38 - 0 19 20 - 0 26 42 - 0 17 16 -0.44 25 0 0 - 0 41 33 12 29 0.7 34 125 55 - 0 44 11 - 0 38 54 - 0 46 15 - 0 36 50 -0.44 26 0 0 - 1 0 32 12 29 4.3 35 125 54 - 1 3 9 - 0 57 54 - 1 5 13 - 0 55 50 -0.44 27 0 0 - 1 18 56 12 29 8.1 36 125 53 - 1 21 33 - 1 16 18 - 1 23 36 - 1 14 15 -0.44 28 0 0 - 1 36 45 12 29 11.9 37 126 52 - 1 39 22 - 1 34 8 - 1 41 25 - 1 32 5 -0.44 29 0 0 - 1 53 59 12 29 15.8 38 126 51 - 1 56 36 - 1 51 23 - 1 58 39 - 1 49 20 -0.44 30 0 0 - 2 10 38 12 29 19.8 39 126 50 - 2 13 15 - 2 8 2 - 2 15 17 - 2 6 0 -0.44 31 0 0 - 2 26 42 12 29 23.8 39 126 49 - 2 29 18 - 2 24 6 - 2 31 20 - 2 22 4 -0.44 32 0 0 - 2 42 10 12 29 28.0 40 127 48 - 2 44 46 - 2 39 34 - 2 46 47 - 2 37 33 -0.44 33 0 0 - 2 57 3 12 29 32.2 41 127 47 - 2 59 38 - 2 54 27 - 3 1 39 - 2 52 26 -0.44 34 0 0 - 3 11 20 12 29 36.5 42 127 46 - 3 13 54 - 3 8 45 - 3 15 56 - 3 6 43 -0.44 35 0 0 - 3 25 1 12 29 40.8 43 128 45 - 3 27 35 - 3 22 26 - 3 29 36 - 3 20 25 -0.44 36 0 0 - 3 38 6 12 29 45.3 44 128 44 - 3 40 40 - 3 35 32 - 3 42 41 - 3 33 31 -0.45 37 0 0 - 3 50 36 12 29 49.8 45 128 43 - 3 53 10 - 3 48 2 - 3 55 10 - 3 46 1 -0.45 38 0 0 - 4 2 29 12 29 54.3 46 129 42 - 4 5 3 - 3 59 55 - 4 7 3 - 3 57 55 -0.45 39 0 0 - 4 13 47 12 29 58.9 47 129 41 - 4 16 20 - 4 11 13 - 4 18 20 - 4 9 13 -0.45 40 0 0 - 4 24 28 12 30 3.6 48 130 40 - 4 27 1 - 4 21 55 - 4 29 1 - 4 19 55 -0.45 41 0 0 - 4 34 34 12 30 8.3 49 130 39 - 4 37 6 - 4 32 1 - 4 39 6 - 4 30 1 -0.45 42 0 0 - 4 44 3 12 30 13.1 50 131 38 - 4 46 35 - 4 41 30 - 4 48 35 - 4 39 30 -0.45 43 0 0 - 4 52 56 12 30 18.0 51 131 37 - 4 55 28 - 4 50 23 - 4 57 28 - 4 48 24 -0.45 44 0 0 - 5 1 13 12 30 22.9 51 132 36 - 5 3 45 - 4 58 41 - 5 5 44 - 4 56 41 -0.45 45 0 0 - 5 8 54 12 30 27.8 52 133 35 - 5 11 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57 - 5 16 1 - 5 6 58 -0.45 70 0 0 - 5 4 0 12 32 44.0 66 168 9 - 5 6 32 - 5 1 28 - 5 8 31 - 4 59 28 -0.45 71 0 0 - 4 55 54 12 32 49.8 66 171 8 - 4 58 26 - 4 53 21 - 5 0 26 - 4 51 22 -0.45 72 0 0 - 4 47 11 12 32 55.5 66 173 7 - 4 49 44 - 4 44 39 - 4 51 44 - 4 42 39 -0.45 73 0 0 - 4 37 52 12 33 1.3 66 175 6 - 4 40 25 - 4 35 19 - 4 42 25 - 4 33 19 -0.45 74 0 0 - 4 27 57 12 33 7.1 65 177 5 - 4 30 30 - 4 25 23 - 4 32 30 - 4 23 23 -0.45 75 0 0 - 4 17 24 12 33 12.9 65 179 4 - 4 19 58 - 4 14 51 - 4 21 58 - 4 12 51 -0.45 76 0 0 - 4 6 16 12 33 18.7 65 181 3 - 4 8 49 - 4 3 42 - 4 10 50 - 4 1 41 -0.45 77 0 0 - 3 54 30 12 33 24.5 65 184 2 - 3 57 4 - 3 51 56 - 3 59 5 - 3 49 55 -0.45 78 0 0 - 3 42 8 12 33 30.3 65 186 1 - 3 44 43 - 3 39 34 - 3 46 44 - 3 37 33 -0.45 79 0 0 - 3 29 10 12 33 36.1 64 188 0 - 3 31 45 - 3 26 35 - 3 33 46 - 3 24 34 -0.45 80 0 0 - 3 15 35 12 33 41.9 64 190 -1 - 3 18 10 - 3 13 0 - 3 20 12 - 3 10 59 -0.45 81 0 0 - 3 1 24 12 33 47.7 63 192 -2 - 3 3 59 - 2 58 49 - 3 6 1 - 2 56 47 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1.3 55 210 -15 0 54 52 1 0 13 0 52 46 1 2 19 -0.45 95 0 0 1 20 2 12 35 6.7 54 211 -17 1 17 21 1 22 43 1 15 14 1 24 50 -0.45 96 0 0 1 43 5 12 35 12.1 53 212 -18 1 40 24 1 45 47 1 38 17 1 47 54 -0.45 97 0 0 2 6 43 12 35 17.5 52 213 -19 2 4 1 2 9 25 2 1 54 2 11 32 -0.45 98 0 0 2 30 54 12 35 22.8 51 214 -20 2 28 11 2 33 37 2 26 4 2 35 44 -0.45 99 0 0 2 55 38 12 35 28.0 51 214 -21 2 52 55 2 58 21 2 50 47 3 0 29 -0.45 100 0 0 3 20 55 12 35 33.2 50 215 -22 3 18 11 3 23 39 3 16 3 3 25 47 -0.45 101 0 0 3 46 44 12 35 38.4 49 216 -23 3 44 0 3 49 28 3 41 51 3 51 37 -0.45 102 0 0 4 13 5 12 35 43.5 48 217 -24 4 10 20 4 15 50 4 8 11 4 17 59 -0.45 103 0 0 4 39 58 12 35 48.5 47 217 -25 4 37 13 4 42 43 4 35 3 4 44 53 -0.45 104 0 0 5 7 22 12 35 53.4 46 218 -26 5 4 36 5 10 8 5 2 26 5 12 18 -0.45 105 0 0 5 35 16 12 35 58.3 45 219 -27 5 32 29 5 38 2 5 30 19 5 40 13 -0.45 106 0 0 6 3 40 12 36 3.1 44 219 -28 6 0 53 6 6 27 5 58 42 6 8 38 -0.45 107 0 0 6 32 33 12 36 7.8 43 220 -29 6 29 46 6 35 21 6 27 35 6 37 32 -0.45 108 0 0 7 1 55 12 36 12.5 42 220 -30 6 59 7 7 4 43 6 56 56 7 6 55 -0.45 109 0 0 7 31 45 12 36 17.0 41 221 -31 7 28 57 7 34 34 7 26 45 7 36 46 -0.45 110 0 0 8 2 3 12 36 21.5 40 221 -32 7 59 14 8 4 52 7 57 1 8 7 4 -0.45 111 0 0 8 32 47 12 36 25.9 39 222 -33 8 29 57 8 35 36 8 27 44 8 37 49 -0.45 112 0 0 9 3 56 12 36 30.2 38 222 -34 9 1 6 9 6 47 8 58 53 9 9 0 -0.45 113 0 0 9 35 31 12 36 34.4 37 223 -35 9 32 41 9 38 22 9 30 27 9 40 36 -0.45 114 0 0 10 7 30 12 36 38.5 35 223 -36 10 4 39 10 10 22 10 2 25 10 12 36 -0.45 115 0 0 10 39 53 12 36 42.5 34 224 -37 10 37 1 10 42 45 10 34 47 10 44 59 -0.45 116 0 0 11 12 38 12 36 46.3 33 224 -38 11 9 46 11 15 30 11 7 31 11 17 45 -0.45 117 0 0 11 45 44 12 36 50.1 32 224 -39 11 42 52 11 48 37 11 40 36 11 50 53 -0.45 118 0 0 12 19 11 12 36 53.8 31 225 -40 12 16 18 12 22 5 12 14 2 12 24 20 -0.45 119 0 0 12 52 58 12 36 57.3 30 225 -41 12 50 4 12 55 52 12 47 48 12 58 8 -0.45 120 0 0 13 27 3 12 37 0.8 29 226 -42 13 24 9 13 29 58 13 21 53 13 32 14 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48 21 4 30 21 15 9 -0.44 134 0 0 21 46 14 12 37 35.7 13 231 -53 21 43 15 21 49 13 21 40 54 21 51 34 -0.45 135 0 0 22 22 39 12 37 37.2 12 231 -53 22 19 40 22 25 39 22 17 19 22 27 59 -0.45 136 0 0 22 59 4 12 37 38.6 11 232 -54 22 56 4 23 2 4 22 53 44 23 4 24 -0.45 137 0 0 23 35 27 12 37 39.8 10 232 -54 23 32 27 23 38 27 23 30 6 23 40 48 -0.45 138 0 0 24 11 47 12 37 40.9 9 233 -55 24 8 47 24 14 47 24 6 26 24 17 8 -0.45 139 0 0 24 48 2 12 37 41.9 8 233 -55 24 45 2 24 51 3 24 42 41 24 53 24 -0.45 140 0 0 25 24 13 12 37 42.7 7 234 -56 25 21 13 25 27 13 25 18 51 25 29 34 -0.45 141 0 0 26 0 16 12 37 43.4 6 234 -56 25 57 16 26 3 17 25 54 55 26 5 38 -0.45 142 0 0 26 36 12 12 37 44.0 5 234 -56 26 33 12 26 39 13 26 30 51 26 41 34 -0.45 143 0 0 27 11 59 12 37 44.5 4 235 -57 27 8 59 27 15 0 27 6 38 27 17 21 -0.45 144 0 0 27 47 36 12 37 44.8 2 235 -57 27 44 36 27 50 37 27 42 14 27 52 58 -0.46 145 0 0 28 23 1 12 37 45.0 1 236 -57 28 20 1 28 26 2 28 17 40 28 28 23 -0.47 146 0 0 28 58 15 12 37 45.1 0 236 -58 28 55 14 29 1 15 28 52 53 29 3 37 -0.55 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 6856-01252-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 19 44.8645 DE: -28 57 17.249 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 19 44.8644 DE: -28 57 17.250 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.6 * B mag [mag]: 10.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2156) Kate asteroid class: approx. diameter [km]: 8 approx. diameter ["]: 0.006 distance from Earth [AU]: 1.90250 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#50 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): 0.011", 0.002", 90.114° remarks: * orbital elements for (2156)Kate : Mean anomaly = 303.2048720689 deg Arg. of pericenter = 4.6854795786 deg Long. of node = 17.1259128223 deg Inclination = 5.3471757150 deg Eccentricity = 0.2013220249 Semimajor axis = 2.2424818704 AU Perihelion dist = 1.7910208794 AU Mag: H = 12.69, G = 0.15 Epoch of elements : MJD 60585.52283617 TDT (2024 Oct 02.5228) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr24,0.43,2024,10,2,12.548075,-0.066246,0.407705,11.071500,1.796919,0.005342,0.000151,0.000000,0.000000 75.3872,-28.9457,-10.93,-3.89,False TYC 6856-01252-1,18.32912906,-28.9547915,10.85,10.55,10.39,0.0,0,,18.35524597,-28.9457406,6.37,6.09,0,0,0 2156,Kate,16.92,8.455,1.9025,0,0,3.899,8.31,,0.8,0 0,303.0514,2024,10,2,4.6855,17.1259,5.3472,0.20132,2.24248,1.79102,12.68,5.0,0.15 1.392,0.0113,0.0016,90,0.0024,Known errors,0.85,0,-1,-1 20241002_1252-1,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:30 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org