IOTA/IOTA-ES occultation update for (1351) Uzbekistania / UCAC4 271-112320 event on 2024 Aug 04, 20:52 UT Visible from Summary ------- On 2024 Aug 04 UT, the 68.252 km diameter asteroid (1351) Uzbekistania will occult a 11.3 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.23 mag to 15.50 mag (the magnitude of the asteroid) for at most 10.610 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 Aug 04, 20:36 - 2024 Aug 04, 21:08 * geocentric midpoint of event [JD]: 2460527.36985617 * magnitude of target star: 11.29 * magnitude drop [mag]: 4.23 * estimated maximum duration [s]: 10.610 * Moon: 0 % sunlit, 130° distance * Sun: 133° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 74 * 1 sigma uncertainty interval [path widths]: +/- 0.40 * 1 sigma uncertainty interval [seconds]: +/- 6.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.003", 94°) * approx speed of asteroid's shadow [km/s]: 6.4350 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 271-112320 by 1351 Uzbekistania on 2024 Aug 4 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 - 49 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 44 17 0 .... - 48 0 0 44 18 19 21 7 52.2 1 146 13 44 54 23 43 42 32 .. .. .. 43 14 19 .... - 47 0 0 43 14 28 21 7 51.7 2 147 13 43 50 39 42 38 35 44 19 36 42 10 16 -0.19 - 46 0 0 42 9 15 21 7 50.7 3 147 12 42 45 31 41 33 16 43 14 33 41 4 54 -0.30 - 45 0 0 41 2 44 21 7 49.1 5 148 11 41 39 4 40 26 42 42 8 9 39 58 17 -0.34 - 44 0 0 39 54 59 21 7 46.8 6 149 10 40 31 21 39 18 55 41 0 28 38 50 29 -0.37 - 43 0 0 38 46 5 21 7 44.0 7 149 9 39 22 27 38 10 1 39 51 34 37 41 34 -0.38 - 42 0 0 37 36 7 21 7 40.4 9 150 8 38 12 28 37 0 4 38 41 34 36 31 39 -0.40 - 41 0 0 36 25 10 21 7 36.2 10 150 6 37 1 28 35 49 10 37 30 31 35 20 47 -0.40 - 40 0 0 35 13 20 21 7 31.2 12 151 5 35 49 33 34 37 24 36 18 33 34 9 5 -0.41 - 39 0 0 34 0 42 21 7 25.5 13 152 4 34 36 50 33 24 53 35 5 45 32 56 39 -0.42 - 38 0 0 32 47 24 21 7 19.1 14 152 3 33 23 24 32 11 42 33 52 12 31 43 34 -0.42 - 37 0 0 31 33 31 21 7 12.0 16 153 2 32 9 22 30 57 58 32 38 3 30 29 57 -0.42 - 36 0 0 30 19 10 21 7 4.1 17 153 1 30 54 50 29 43 47 31 23 23 29 15 53 -0.43 - 35 0 0 29 4 26 21 6 55.4 19 154 0 29 39 55 28 29 15 30 8 18 28 1 30 -0.43 - 34 0 0 27 49 26 21 6 46.1 20 154 -2 28 24 42 27 14 28 28 52 55 26 46 52 -0.43 - 33 0 0 26 34 17 21 6 36.0 22 155 -3 27 9 19 25 59 32 27 37 21 25 32 7 -0.43 - 32 0 0 25 19 5 21 6 25.2 23 155 -4 25 53 52 24 44 34 26 21 42 24 17 20 -0.44 - 31 0 0 24 3 55 21 6 13.6 25 156 -5 24 38 26 23 29 39 25 6 4 23 2 37 -0.44 - 30 0 0 22 48 53 21 6 1.4 26 156 -7 23 23 8 22 14 53 23 50 32 21 48 4 -0.44 - 29 0 0 21 34 5 21 5 48.6 28 157 -8 22 8 3 21 0 22 22 35 14 20 33 45 -0.44 - 28 0 0 20 19 36 21 5 35.1 29 157 -9 20 53 17 19 46 10 21 20 13 19 19 47 -0.44 - 27 0 0 19 5 31 21 5 21.0 31 158 -11 19 38 54 18 32 23 20 5 35 18 6 13 -0.44 - 26 0 0 17 51 55 21 5 6.3 32 158 -12 18 25 0 17 19 4 18 51 26 16 53 9 -0.44 - 25 0 0 16 38 52 21 4 51.0 34 159 -13 17 11 38 16 6 20 17 37 50 15 40 39 -0.44 - 24 0 0 15 26 27 21 4 35.2 35 160 -14 15 58 54 14 54 13 16 24 50 14 28 46 -0.44 - 23 0 0 14 14 43 21 4 19.0 37 160 -16 14 46 51 13 42 48 15 12 32 13 17 36 -0.44 - 22 0 0 13 3 44 21 4 2.2 38 161 -17 13 35 33 12 32 7 14 0 58 12 7 10 -0.44 - 21 0 0 11 53 33 21 3 45.0 39 161 -18 12 25 3 11 22 15 12 50 13 10 57 32 -0.44 - 20 0 0 10 44 13 21 3 27.5 41 162 -20 11 15 23 10 13 13 11 40 18 9 48 45 -0.44 - 19 0 0 9 35 46 21 3 9.5 42 162 -21 10 6 38 9 5 6 10 31 17 8 40 52 -0.44 - 18 0 0 8 28 16 21 2 51.2 43 163 -22 8 58 49 7 57 54 9 23 13 7 33 54 -0.44 - 17 0 0 7 21 44 21 2 32.7 45 164 -23 7 51 58 6 51 40 8 16 7 6 27 55 -0.43 - 16 0 0 6 16 12 21 2 13.8 46 165 -25 6 46 7 5 46 26 7 10 1 5 22 55 -0.43 - 15 0 0 5 11 42 21 1 54.7 47 165 -26 5 41 19 4 42 14 6 4 58 4 18 57 -0.43 - 14 0 0 4 8 15 21 1 35.4 49 166 -27 4 37 34 3 39 5 5 0 58 3 16 2 -0.43 - 13 0 0 3 5 53 21 1 15.9 50 167 -28 3 34 54 2 37 1 3 58 4 2 14 12 -0.43 - 12 0 0 2 4 36 21 0 56.2 51 168 -29 2 33 20 1 36 2 2 56 16 1 13 26 -0.43 - 11 0 0 1 4 26 21 0 36.4 52 169 -31 1 32 53 0 36 9 1 55 34 0 13 46 -0.43 - 10 0 0 0 5 24 21 0 16.5 53 170 -32 0 33 33 - 0 22 37 0 56 1 - 0 44 47 -0.43 - 9 0 0 - 0 52 31 20 59 56.5 54 171 -33 - 0 24 39 - 1 20 16 - 0 2 24 - 1 42 12 -0.43 - 8 0 0 - 1 49 18 20 59 36.5 55 172 -34 - 1 21 42 - 2 16 47 - 0 59 41 - 2 38 30 -0.43 - 7 0 0 - 2 44 56 20 59 16.4 56 173 -35 - 2 17 36 - 3 12 9 - 1 55 48 - 3 33 40 -0.42 - 6 0 0 - 3 39 26 20 58 56.3 57 174 -37 - 3 12 21 - 4 6 23 - 2 50 46 - 4 27 42 -0.42 - 5 0 0 - 4 32 47 20 58 36.2 58 175 -38 - 4 5 58 - 4 59 29 - 3 44 35 - 5 20 36 -0.42 - 4 0 0 - 5 24 59 20 58 16.0 59 176 -39 - 4 58 25 - 5 51 26 - 4 37 14 - 6 12 22 -0.42 - 3 0 0 - 6 16 3 20 57 56.0 60 178 -40 - 5 49 43 - 6 42 15 - 5 28 44 - 7 2 59 -0.42 - 2 0 0 - 7 5 58 20 57 36.0 61 179 -41 - 6 39 53 - 7 31 56 - 6 19 6 - 7 52 29 -0.42 - 1 0 0 - 7 54 45 20 57 16.0 62 181 -42 - 7 28 54 - 8 20 29 - 7 8 18 - 8 40 52 -0.42 0 0 0 - 8 42 25 20 56 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Uncertainty in time = +/- 7 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 271-112320 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 45 09.3612 DE: -35 55 56.207 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 45 09.3611 DE: -35 55 56.207 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.3 * B mag [mag]: 11.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1351) Uzbekistania asteroid class: approx. diameter [km]: 68 approx. diameter ["]: 0.036 distance from Earth [AU]: 2.61880 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#59 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): 0.025", 0.003", 94.478° remarks: * orbital elements for (1351)Uzbekistania : Mean anomaly = 209.1967198199 deg Arg. of pericenter = 64.5416382870 deg Long. of node = 9.3083643423 deg Inclination = 9.6415321048 deg Eccentricity = 0.0690893179 Semimajor axis = 3.1965424822 AU Perihelion dist = 2.9756955424 AU Mag: H = 10.01, G = 0.15 Epoch of elements : MJD 60526.86985671 TDT (2024 Aug 04.8699) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#592023Apr24,10.61,2024,8,4,20.876548,0.231847,0.296400,-2.860884,2.237715,0.004120,0.000770,0.000001,0.000000 -0.3503,-35.9441,-131.63,16.92,False UCAC4 271-112320,17.75260034,-35.9322798,11.57,11.29,11.14,0.0,0,,17.78049356,-35.9440905,4.23,3.94,0,0,0 1351,Uzbekistania,15.50,68.252,2.6188,0,0,-0.790,7.51,,3.6,0 0,209.0467,2024,8,4,64.5416,9.3084,9.6415,0.06909,3.19654,2.97570,10.01,5.0,0.15 1.397,0.0253,0.0033,94,0.0143,Known errors,0.90,0,-1,-1 20240804_112320,60140.23 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:33 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org