IOTA/IOTA-ES occultation update for (2315) Czechoslovakia / UCAC4 354-193966 event on 2024 Jul 26, 21:28 UT Visible from Summary ------- On 2024 Jul 26 UT, the 23.834 km diameter asteroid (2315) Czechoslovakia will occult a 11.9 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.55 mag to 15.45 mag (the magnitude of the asteroid) for at most 4.030 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 Jul 26, 21:18 - 2024 Jul 26, 21:39 * geocentric midpoint of event [JD]: 2460518.39502013 * magnitude of target star: 11.94 * magnitude drop [mag]: 3.55 * estimated maximum duration [s]: 4.030 * Moon: 63 % sunlit, 39° distance * Sun: 140° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 43 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 7.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.016) * 1 sigma uncertainty ellipse (major, minor, PA): (0.030", 0.003", 58°) * approx speed of asteroid's shadow [km/s]: 5.9208 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 354-193966 by 2315 Czechoslovakia on 2024 Jul 26 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 ' " Longitude Longitude Longitude Longitude 64 25 3 69 0 0 21 18 51.8 1 161 0 63 50 28 64 59 21 63 27 39 65 21 39 .... 65 13 42 68 0 0 21 18 52.5 2 162 -1 64 40 59 65 46 10 64 19 25 66 7 17 1.02 65 53 32 67 0 0 21 18 53.9 3 163 -2 65 22 27 66 24 24 65 1 59 66 44 29 1.21 66 25 48 66 0 0 21 18 55.8 4 163 -3 65 56 8 66 55 15 65 36 37 67 14 26 1.30 66 51 29 65 0 0 21 18 58.3 5 164 -4 66 23 5 67 19 42 66 4 24 67 38 4 1.36 67 11 24 64 0 0 21 19 1.4 6 164 -5 66 44 7 67 38 30 66 26 11 67 56 9 1.39 67 26 11 63 0 0 21 19 5.1 7 164 -6 66 59 56 67 52 18 66 42 39 68 9 19 1.42 67 36 25 62 0 0 21 19 9.4 8 164 -6 67 11 4 68 1 38 66 54 24 68 18 4 1.44 67 42 33 61 0 0 21 19 14.2 9 164 -7 67 18 1 68 6 57 67 1 53 68 22 51 1.45 67 44 58 60 0 0 21 19 19.6 10 164 -8 67 21 11 68 8 38 67 5 32 68 24 3 1.46 67 43 59 59 0 0 21 19 25.5 11 164 -9 67 20 52 68 6 59 67 5 41 68 21 59 -1.47 67 39 54 58 0 0 21 19 32.0 12 164 -10 67 17 24 68 2 17 67 2 37 68 16 53 -1.48 67 32 56 57 0 0 21 19 39.1 13 164 -11 67 11 0 67 54 46 66 56 35 68 9 0 -1.49 67 23 18 56 0 0 21 19 46.7 14 164 -12 67 1 54 67 44 38 66 47 49 67 58 32 -1.49 67 11 11 55 0 0 21 19 54.9 15 164 -13 66 50 15 67 32 2 66 36 29 67 45 38 -1.50 66 56 43 54 0 0 21 20 3.6 15 163 -14 66 36 13 67 17 9 66 22 44 67 30 28 -1.50 66 40 3 53 0 0 21 20 12.8 16 163 -15 66 19 56 67 0 5 66 6 43 67 13 9 -1.51 66 21 16 52 0 0 21 20 22.7 17 163 -16 66 1 31 66 40 57 65 48 32 66 53 47 -1.51 66 0 29 51 0 0 21 20 33.0 18 162 -17 65 41 4 66 19 50 65 28 18 66 32 27 -1.51 65 37 47 50 0 0 21 20 44.0 19 162 -18 65 18 39 65 56 49 65 6 5 66 9 15 -1.51 65 13 13 49 0 0 21 20 55.5 20 161 -19 64 54 22 65 31 59 64 41 59 65 44 14 -1.52 64 46 51 48 0 0 21 21 7.5 21 161 -20 64 28 15 65 5 22 64 16 1 65 17 27 -1.52 64 18 44 47 0 0 21 21 20.1 22 160 -21 64 0 21 64 37 2 63 48 17 64 48 58 -1.52 63 48 53 46 0 0 21 21 33.3 22 160 -22 63 30 43 64 6 59 63 18 46 64 18 48 -1.52 63 17 22 45 0 0 21 21 47.0 23 159 -23 62 59 22 63 35 17 62 47 33 63 46 58 -1.52 62 44 10 44 0 0 21 22 1.3 24 158 -24 62 26 20 63 1 56 62 14 36 63 13 31 -1.52 62 9 19 43 0 0 21 22 16.2 25 158 -25 61 51 37 62 26 56 61 39 59 62 38 26 -1.52 61 32 48 42 0 0 21 22 31.6 26 157 -26 61 15 13 61 50 19 61 3 40 62 1 44 -1.52 60 54 38 41 0 0 21 22 47.6 26 156 -27 60 37 9 61 12 3 60 25 39 61 23 24 -1.52 60 14 48 40 0 0 21 23 4.2 27 156 -28 59 57 23 60 32 8 59 45 56 60 43 26 -1.52 59 33 16 39 0 0 21 23 21.4 28 155 -29 59 15 55 59 50 33 59 4 30 60 1 49 -1.52 58 50 2 38 0 0 21 23 39.1 29 154 -30 58 32 42 59 7 16 58 21 19 59 18 31 -1.51 58 5 3 37 0 0 21 23 57.5 29 153 -32 57 47 44 58 22 17 57 36 22 58 33 30 -1.51 57 18 16 36 0 0 21 24 16.4 30 152 -33 57 0 56 57 35 29 56 49 33 57 46 44 -1.51 56 29 37 35 0 0 21 24 36.0 30 151 -34 56 12 16 56 46 53 56 0 52 56 58 8 -1.51 55 39 4 34 0 0 21 24 56.2 31 150 -35 55 21 40 55 56 23 55 10 14 56 7 40 -1.51 54 46 32 33 0 0 21 25 17.0 31 149 -36 54 29 3 55 3 55 54 17 34 55 15 15 -1.50 53 51 55 32 0 0 21 25 38.5 32 148 -37 53 34 20 54 9 25 53 22 46 54 20 48 -1.50 52 55 8 31 0 0 21 26 0.6 32 146 -38 52 37 25 53 12 45 52 25 45 53 24 13 -1.50 51 56 2 30 0 0 21 26 23.4 33 145 -40 51 38 9 52 13 48 51 26 22 52 25 23 -1.50 50 54 29 29 0 0 21 26 46.8 33 144 -41 50 36 24 51 12 27 50 24 30 51 24 10 -1.49 49 50 21 28 0 0 21 27 11.0 33 143 -42 49 32 1 50 8 33 49 19 58 50 20 24 -1.49 48 43 26 27 0 0 21 27 36.0 34 141 -43 48 24 49 49 1 54 48 12 34 49 13 56 -1.49 47 33 30 26 0 0 21 28 1.7 34 140 -44 47 14 33 47 52 18 47 2 5 48 4 32 -1.49 46 20 17 25 0 0 21 28 28.2 34 139 -45 46 0 56 46 39 28 45 48 12 46 51 56 -1.48 45 3 27 24 0 0 21 28 55.5 34 137 -47 44 43 39 45 23 5 44 30 36 45 35 51 -1.48 43 42 37 23 0 0 21 29 23.8 34 136 -48 43 22 16 44 2 47 43 8 51 44 15 53 -1.48 42 17 19 22 0 0 21 29 53.0 34 134 -49 41 56 19 42 38 7 41 42 28 42 51 37 -1.48 40 46 57 21 0 0 21 30 23.3 34 133 -50 40 25 10 41 8 29 40 10 46 41 22 28 -1.48 39 10 43 20 0 0 21 30 54.7 33 131 -51 38 48 0 39 33 11 38 32 58 39 47 44 -1.48 37 27 40 19 0 0 21 31 27.5 33 129 -52 37 3 47 37 51 15 36 47 57 38 6 30 -1.48 35 36 25 18 0 0 21 32 1.8 32 128 -53 35 11 3 36 1 24 34 54 13 36 17 33 -1.48 33 35 5 17 0 0 21 32 37.8 31 126 -54 33 7 47 34 1 52 32 49 38 34 19 9 -1.48 Latitude Latitude Latitude Latitude 33 0 0 16 43 41 21 32 47.9 31 125 -54 16 56 24 16 31 3 17 4 46 16 22 49 -1.47 32 0 0 16 16 50 21 33 5.0 30 125 -54 16 29 26 16 4 19 16 37 43 15 56 10 -1.47 31 0 0 15 51 18 21 33 21.7 30 124 -54 16 3 47 15 38 53 16 12 0 15 30 48 -1.47 30 0 0 15 27 4 21 33 38.1 29 123 -55 15 39 26 15 14 45 15 47 35 15 6 44 -1.47 29 0 0 15 4 6 21 33 54.1 29 122 -55 15 16 23 14 51 53 15 24 27 14 43 55 -1.47 28 0 0 14 42 24 21 34 9.7 28 122 -55 14 54 35 14 30 16 15 2 36 14 22 22 -1.47 27 0 0 14 21 57 21 34 25.0 28 121 -55 14 34 3 14 9 54 14 42 1 14 2 3 -1.47 26 0 0 14 2 44 21 34 39.9 27 121 -55 14 14 46 13 50 46 14 22 41 13 42 58 -1.48 25 0 0 13 44 45 21 34 54.4 26 120 -55 13 56 43 13 32 51 14 4 35 13 25 5 -1.48 24 0 0 13 27 59 21 35 8.6 26 119 -55 13 39 53 13 16 9 13 47 43 13 8 25 -1.48 23 0 0 13 12 26 21 35 22.3 25 119 -55 13 24 17 13 0 39 13 32 4 12 52 58 -1.48 22 0 0 12 58 5 21 35 35.7 24 118 -54 13 9 52 12 46 21 13 17 38 12 38 42 -1.48 21 0 0 12 44 55 21 35 48.7 24 118 -54 12 56 40 12 33 14 13 4 24 12 25 37 -1.48 20 0 0 12 32 57 21 36 1.3 23 117 -54 12 44 40 12 21 18 12 52 22 12 13 43 -1.49 19 0 0 12 22 11 21 36 13.4 22 117 -54 12 33 51 12 10 34 12 41 32 12 2 59 -1.49 18 0 0 12 12 35 21 36 25.2 21 117 -53 12 24 14 12 1 0 12 31 53 11 53 27 -1.49 17 0 0 12 4 11 21 36 36.6 21 116 -53 12 15 48 11 52 37 12 23 26 11 45 4 -1.49 16 0 0 11 56 57 21 36 47.6 20 116 -52 12 8 33 11 45 24 12 16 11 11 37 52 -1.50 15 0 0 11 50 54 21 36 58.1 19 115 -52 12 2 29 11 39 22 12 10 7 11 31 51 -1.50 14 0 0 11 46 2 21 37 8.3 18 115 -51 11 57 37 11 34 31 12 5 14 11 27 0 -1.50 13 0 0 11 42 22 21 37 18.0 17 115 -51 11 53 56 11 30 50 12 1 33 11 23 20 -1.51 12 0 0 11 39 52 21 37 27.3 17 114 -50 11 51 27 11 28 21 11 59 4 11 20 50 -1.51 11 0 0 11 38 35 21 37 36.1 16 114 -50 11 50 10 11 27 3 11 57 47 11 19 32 -1.52 10 0 0 11 38 29 21 37 44.5 15 114 -49 11 50 5 11 26 57 11 57 43 11 19 25 -1.52 9 0 0 11 39 36 21 37 52.5 14 113 -49 11 51 13 11 28 2 11 58 52 11 20 30 -1.53 8 0 0 11 41 56 21 38 0.0 13 113 -48 11 53 34 11 30 21 12 1 14 11 22 47 -1.53 7 0 0 11 45 29 21 38 7.0 12 113 -47 11 57 9 11 33 52 12 4 50 11 26 18 -1.54 6 0 0 11 50 16 21 38 13.6 11 113 -46 12 1 59 11 38 37 12 9 41 11 31 2 -1.55 5 0 0 11 56 18 21 38 19.7 10 112 -46 12 8 3 11 44 37 12 15 47 11 37 0 -1.55 4 0 0 12 3 36 21 38 25.3 10 112 -45 12 15 24 11 51 52 12 23 9 11 44 13 -1.56 3 0 0 12 12 10 21 38 30.3 9 112 -44 12 24 1 12 0 23 12 31 49 11 52 42 -1.57 2 0 0 12 22 2 21 38 34.9 8 112 -43 12 33 56 12 10 11 12 41 46 12 2 28 -1.59 1 0 0 12 33 11 21 38 39.0 7 111 -42 12 45 10 12 21 17 12 53 2 12 13 31 -1.60 0 0 0 12 45 41 21 38 42.5 6 111 -42 12 57 44 12 33 42 13 5 39 12 25 53 -1.62 - 1 0 0 12 59 31 21 38 45.5 5 111 -41 13 11 39 12 47 28 13 19 38 12 39 36 -1.65 - 2 0 0 13 14 44 21 38 48.0 4 111 -40 13 26 57 13 2 35 13 34 59 12 54 40 -1.68 - 3 0 0 13 31 20 21 38 49.8 3 111 -39 13 43 39 13 19 6 13 51 45 13 11 7 -1.75 - 4 0 0 13 49 22 21 38 51.1 2 110 -38 14 1 47 13 37 1 14 9 57 13 28 59 -1.89 - 5 0 0 14 8 51 21 38 51.8 1 110 -37 14 21 23 13 56 23 14 29 37 13 48 16 -2.44 Uncertainty in time = +/- 7 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 354-193966 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 23 14 48.2757 DE: -19 22 20.275 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 23 14 48.2758 DE: -19 22 20.275 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2315) Czechoslovakia asteroid class: approx. diameter [km]: 24 approx. diameter ["]: 0.016 distance from Earth [AU]: 2.04130 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 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): 0.030", 0.003", 57.547° remarks: * orbital elements for (2315)Czechoslovakia : Mean anomaly = 296.1943169916 deg Arg. of pericenter = 14.4294198632 deg Long. of node = 30.0704689446 deg Inclination = 10.7046698523 deg Eccentricity = 0.1086014200 Semimajor axis = 3.0086536597 AU Perihelion dist = 2.6819096000 AU Mag: H = 10.83, G = 0.15 Epoch of elements : MJD 60517.89502046 TDT (2024 Jul 26.8950) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr24,4.03,2024,7,26,21.480483,-0.541904,0.626704,-2.529006,-2.184569,-0.003572,-0.000462,0.000001,0.000001 81.7589,-19.2363,-140.57,19.17,False UCAC4 354-193966,23.24674322,-19.3722986,12.29,11.94,11.75,0.0,0,,23.26863372,-19.2362738,3.55,3.30,0,0,0 2315,Czechoslovakia,15.45,23.834,2.0413,0,0,-0.770,-9.41,,1.4,0 0,296.0253,2024,7,26,14.4294,30.0705,10.7047,0.10860,3.00865,2.68191,10.83,5.0,0.15 1.327,0.0297,0.0031,58,0.0053,Known errors,0.99,0,-1,-1 20240726_193966,60140.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org