IOTA/IOTA-ES occultation update for (13364) 1998 UK20 / TYC 7445-01181-1 event on 2024 Nov 01, 22:47 UT Visible from Summary ------- On 2024 Nov 01 UT, the 11.2680814245584 km diameter asteroid (13364) 1998 UK20 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 7.49 mag to 18.07 mag (the magnitude of the asteroid) for at most 0.440 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: 82 * date and approx. time of event: 2024 Nov 01, 22:43 - 2024 Nov 01, 22:51 * geocentric midpoint of event [JD]: 2460616.44939716 * magnitude of target star: 10.58 * magnitude drop [mag]: 7.49 * estimated maximum duration [s]: 0.440 * Moon: 0 % sunlit, 73° distance * Sun: 78° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 0.64 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.001", 75°) * approx speed of asteroid's shadow [km/s]: 26.1759 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7445-01181-1 by 13364 1998 UK20 on 2024 Nov 1 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 -178 0 0 -14 5 23 22 43 10.5 1 124 77 -14 9 14 -14 1 33 -14 14 10 -13 56 36 .... -177 0 0 -14 44 43 22 43 10.7 2 124 78 -14 48 32 -14 40 54 -14 53 27 -14 35 59 -0.08 -176 0 0 -15 23 11 22 43 10.9 3 124 79 -15 26 59 -15 19 23 -15 31 52 -15 14 30 -0.13 -175 0 0 -16 0 47 22 43 11.3 4 124 80 -16 4 33 -15 57 0 -16 9 24 -15 52 9 -0.16 -174 0 0 -16 37 31 22 43 11.7 6 123 81 -16 41 16 -16 33 45 -16 46 5 -16 28 56 -0.17 -173 0 0 -17 13 22 22 43 12.2 7 123 82 -17 17 6 -17 9 38 -17 21 54 -17 4 50 -0.18 -172 0 0 -17 48 21 22 43 12.9 8 123 82 -17 52 4 -17 44 39 -17 56 50 -17 39 52 -0.19 -171 0 0 -18 22 29 22 43 13.6 9 122 83 -18 26 10 -18 18 48 -18 30 54 -18 14 3 -0.19 -170 0 0 -18 55 44 22 43 14.4 10 122 84 -18 59 24 -18 52 4 -19 4 7 -18 47 21 -0.19 -169 0 0 -19 28 8 22 43 15.3 11 122 84 -19 31 47 -19 24 30 -19 36 28 -19 19 48 -0.20 -168 0 0 -19 59 41 22 43 16.2 12 121 84 -20 3 18 -19 56 3 -20 7 58 -19 51 24 -0.20 -167 0 0 -20 30 22 22 43 17.2 13 121 84 -20 33 59 -20 26 46 -20 38 37 -20 22 8 -0.20 -166 0 0 -21 0 13 22 43 18.4 14 121 84 -21 3 48 -20 56 38 -21 8 25 -20 52 1 -0.20 -165 0 0 -21 29 13 22 43 19.5 15 120 83 -21 32 47 -21 25 39 -21 37 22 -21 21 4 -0.21 -164 0 0 -21 57 23 22 43 20.8 16 120 83 -22 0 55 -21 53 50 -22 5 29 -21 49 16 -0.21 -163 0 0 -22 24 43 22 43 22.1 17 120 82 -22 28 14 -22 21 11 -22 32 46 -22 16 38 -0.21 -162 0 0 -22 51 13 22 43 23.5 18 119 81 -22 54 44 -22 47 42 -22 59 14 -22 43 11 -0.21 -161 0 0 -23 16 54 22 43 25.0 20 119 81 -23 20 24 -23 13 25 -23 24 53 -23 8 55 -0.21 -160 0 0 -23 41 47 22 43 26.5 21 119 80 -23 45 16 -23 38 18 -23 49 44 -23 33 50 -0.21 -159 0 0 -24 5 51 22 43 28.1 22 118 79 -24 9 19 -24 2 24 -24 13 46 -23 57 57 -0.21 -158 0 0 -24 29 8 22 43 29.7 23 118 78 -24 32 34 -24 25 41 -24 37 0 -24 21 16 -0.21 -157 0 0 -24 51 37 22 43 31.4 23 118 77 -24 55 3 -24 48 11 -24 59 27 -24 43 47 -0.21 -156 0 0 -25 13 19 22 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49 14.4 56 211 -14 - 4 50 24 - 4 42 3 - 4 55 46 - 4 36 41 -0.22 - 60 0 0 - 3 54 49 22 49 19.1 54 211 -15 - 3 59 0 - 3 50 37 - 4 4 24 - 3 45 13 -0.22 - 59 0 0 - 3 2 39 22 49 23.8 53 212 -16 - 3 6 53 - 2 58 26 - 3 12 18 - 2 53 0 -0.22 - 58 0 0 - 2 9 48 22 49 28.5 52 212 -17 - 2 14 3 - 2 5 33 - 2 19 30 - 2 0 6 -0.22 - 57 0 0 - 1 16 16 22 49 33.1 51 213 -18 - 1 20 32 - 1 12 0 - 1 26 1 - 1 6 31 -0.22 - 56 0 0 - 0 22 6 22 49 37.6 49 213 -20 - 0 26 24 - 0 17 49 - 0 31 54 - 0 12 18 -0.22 - 55 0 0 0 32 40 22 49 42.1 48 213 -21 0 28 21 0 36 58 0 22 49 0 42 31 -0.22 - 54 0 0 1 28 0 22 49 46.4 47 214 -22 1 23 40 1 32 19 1 18 6 1 37 53 -0.22 - 53 0 0 2 23 51 22 49 50.7 45 214 -23 2 19 30 2 28 12 2 13 55 2 33 47 -0.22 - 52 0 0 3 20 11 22 49 55.0 44 215 -25 3 15 49 3 24 33 3 10 12 3 30 10 -0.22 - 51 0 0 4 16 57 22 49 59.1 43 215 -26 4 12 34 4 21 20 4 6 56 4 26 58 -0.22 - 50 0 0 5 14 7 22 50 3.1 41 215 -27 5 9 43 5 18 31 5 4 4 5 24 10 -0.22 - 49 0 0 6 11 37 22 50 7.1 40 216 -28 6 7 12 6 16 2 6 1 32 6 21 42 -0.22 - 48 0 0 7 9 25 22 50 10.9 38 216 -29 7 4 59 7 13 50 6 59 18 7 19 32 -0.22 - 47 0 0 8 7 27 22 50 14.6 37 216 -31 8 3 1 8 11 53 7 57 18 8 17 36 -0.22 - 46 0 0 9 5 40 22 50 18.2 36 217 -32 9 1 14 9 10 7 8 55 30 9 15 51 -0.22 - 45 0 0 10 4 2 22 50 21.7 34 217 -33 9 59 35 10 8 30 9 53 51 10 14 14 -0.22 - 44 0 0 11 2 29 22 50 25.0 33 217 -34 10 58 1 11 6 57 10 52 17 11 12 43 -0.22 - 43 0 0 12 0 58 22 50 28.3 32 218 -35 11 56 30 12 5 27 11 50 44 12 11 12 -0.22 - 42 0 0 12 59 25 22 50 31.4 30 218 -36 12 54 57 13 3 54 12 49 11 13 9 41 -0.22 - 41 0 0 13 57 48 22 50 34.3 29 218 -38 13 53 19 14 2 18 13 47 33 14 8 4 -0.22 - 40 0 0 14 56 3 22 50 37.1 27 219 -39 14 51 34 15 0 33 14 45 47 15 6 19 -0.22 - 39 0 0 15 54 7 22 50 39.8 26 219 -40 15 49 37 15 58 37 15 43 51 16 4 23 -0.22 - 38 0 0 16 51 57 22 50 42.4 25 219 -41 16 47 27 16 56 26 16 41 41 17 2 13 -0.22 - 37 0 0 17 49 29 22 50 44.8 23 220 -42 17 44 59 17 53 59 17 39 13 17 59 45 -0.22 - 36 0 0 18 46 41 22 50 47.0 22 220 -43 18 42 12 18 51 11 18 36 25 18 56 57 -0.22 - 35 0 0 19 43 30 22 50 49.2 21 220 -44 19 39 1 19 47 59 19 33 15 19 53 46 -0.22 - 34 0 0 20 39 53 22 50 51.2 19 221 -45 20 35 24 20 44 22 20 29 38 20 50 8 -0.22 - 33 0 0 21 35 47 22 50 53.0 18 221 -46 21 31 19 21 40 16 21 25 34 21 46 1 -0.21 - 32 0 0 22 31 10 22 50 54.7 17 222 -47 22 26 42 22 35 38 22 20 57 22 41 23 -0.21 - 31 0 0 23 25 59 22 50 56.3 15 222 -48 23 21 32 23 30 27 23 15 48 23 36 11 -0.21 - 30 0 0 24 20 12 22 50 57.7 14 222 -48 24 15 45 24 24 39 24 10 2 24 30 23 -0.21 - 29 0 0 25 13 47 22 50 59.0 13 223 -49 25 9 21 25 18 13 25 3 39 25 23 56 -0.21 - 28 0 0 26 6 42 22 51 0.2 12 223 -50 26 2 16 26 11 7 25 56 35 26 16 49 -0.21 - 27 0 0 26 58 54 22 51 1.2 10 224 -51 26 54 29 27 3 19 26 48 49 27 8 59 -0.21 - 26 0 0 27 50 22 22 51 2.1 9 224 -51 27 45 58 27 54 46 27 40 19 28 0 25 -0.21 - 25 0 0 28 41 5 22 51 2.9 8 225 -52 28 36 42 28 45 28 28 31 4 28 51 6 -0.21 - 24 0 0 29 31 0 22 51 3.5 7 225 -53 29 26 38 29 35 22 29 21 2 29 40 59 -0.21 - 23 0 0 30 20 7 22 51 4.1 6 226 -53 30 15 47 30 24 28 30 10 11 30 30 4 -0.21 - 22 0 0 31 8 25 22 51 4.5 4 226 -54 31 4 5 31 12 45 30 58 31 31 18 19 -0.20 - 21 0 0 31 55 52 22 51 4.8 3 227 -55 31 51 34 32 0 11 31 46 1 32 5 44 -0.20 - 20 0 0 32 42 28 22 51 5.1 2 227 -55 32 38 11 32 46 46 32 32 40 32 52 17 -0.19 - 19 0 0 33 28 12 22 51 5.2 1 228 -55 33 23 56 33 32 28 33 18 26 33 37 58 -0.15 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 7445-01181-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 09 32.6301 DE: -33 35 37.702 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 09 32.6300 DE: -33 35 37.702 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.6 * B mag [mag]: 11.3 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (13364) 1998 UK20 asteroid class: approx. diameter [km]: 11 approx. diameter ["]: 0.006 distance from Earth [AU]: 2.60480 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 date of fit: 2023 Apr 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): 0.015", 0.001", 74.522° remarks: * orbital elements for (13364)1998 UK20 : Mean anomaly = 55.6768831040 deg Arg. of pericenter = 230.9421450277 deg Long. of node = 20.9088684343 deg Inclination = 15.0872744158 deg Eccentricity = 0.1130914002 Semimajor axis = 2.7346297485 AU Perihelion dist = 2.4253666411 AU Mag: H = 12.86, G = 0.15 Epoch of elements : MJD 60615.94939708 TDT (2024 Nov 01.9494) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr25,0.44,2024,11,1,22.785532,-0.108803,0.195037,12.909281,7.185707,0.005590,0.000977,0.000000,0.000000 -80.7129,-33.5232,-165.89,-14.82,False TYC 7445-01181-1,20.15906394,-33.5938060,11.33,10.58,10.18,0.1,0,,20.18534598,-33.5232063,7.49,7.44,0,0,0 13364,1998 UK20,18.07,11.457,2.6048,0,0,3.485,24.26,,1.0,0 0,55.4700,2024,11,1,230.9421,20.9089,15.0873,0.11309,2.73463,2.42537,12.86,5.0,0.15 1.643,0.0153,0.0015,75,0.0039,Known errors,1.13,0,-1,-1 20241101_1181-1,60140.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:11 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org