IOTA/IOTA-ES occultation update for (7896) Svejk / TYC 6847-02535-1 event on 2024 Sep 15, 08:57 UT Visible from Summary ------- On 2024 Sep 15 UT, the 15.34 km diameter asteroid (7896) Svejk will occult a 11.3 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 7.10 mag to 18.42 mag (the magnitude of the asteroid) for at most 1.300 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: 93 * date and approx. time of event: 2024 Sep 15, 08:49 - 2024 Sep 15, 09:05 * geocentric midpoint of event [JD]: 2460568.87334662 * magnitude of target star: 11.32 * magnitude drop [mag]: 7.10 * estimated maximum duration [s]: 1.300 * Moon: 89 % sunlit, 42° distance * Sun: 100° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.48 * 1 sigma uncertainty interval [seconds]: +/- 3.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.003", 91°) * approx speed of asteroid's shadow [km/s]: 11.8232 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6847-02535-1 by 7896 Svejk on 2024 Sep 15 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 41 0 0 -29 48 25 8 49 46.9 0 119 57 -29 53 56 -29 42 54 -29 59 14 -29 37 37 .... 42 0 0 -30 17 52 8 49 47.1 1 119 57 -30 23 23 -30 12 21 -30 28 41 -30 7 3 0.51 43 0 0 -30 47 15 8 49 47.5 2 118 56 -30 52 46 -30 41 43 -30 58 5 -30 36 26 0.54 44 0 0 -31 16 33 8 49 48.0 3 118 56 -31 22 5 -31 11 2 -31 27 23 -31 5 44 0.55 45 0 0 -31 45 47 8 49 48.8 4 117 56 -31 51 19 -31 40 15 -31 56 37 -31 34 58 0.56 46 0 0 -32 14 54 8 49 49.7 5 117 55 -32 20 26 -32 9 22 -32 25 45 -32 4 5 0.56 47 0 0 -32 43 54 8 49 50.7 6 116 55 -32 49 26 -32 38 23 -32 54 45 -32 33 5 0.57 48 0 0 -33 12 47 8 49 52.0 7 115 54 -33 18 19 -33 7 15 -33 23 37 -33 1 57 0.57 49 0 0 -33 41 30 8 49 53.4 8 115 54 -33 47 2 -33 35 59 -33 52 21 -33 30 41 0.57 50 0 0 -34 10 5 8 49 55.0 9 114 53 -34 15 37 -34 4 33 -34 20 55 -33 59 15 0.57 51 0 0 -34 38 29 8 49 56.8 10 114 52 -34 44 0 -34 32 57 -34 49 19 -34 27 40 0.57 52 0 0 -35 6 42 8 49 58.7 11 113 52 -35 12 13 -35 1 10 -35 17 32 -34 55 53 0.57 53 0 0 -35 34 43 8 50 0.7 12 113 51 -35 40 14 -35 29 12 -35 45 33 -35 23 54 0.57 54 0 0 -36 2 32 8 50 2.9 13 112 51 -36 8 3 -35 57 1 -36 13 21 -35 51 43 0.57 55 0 0 -36 30 7 8 50 5.3 14 111 50 -36 35 38 -36 24 36 -36 40 56 -36 19 19 0.57 56 0 0 -36 57 29 8 50 7.8 15 111 49 -37 3 0 -36 51 58 -37 8 17 -36 46 42 0.57 57 0 0 -37 24 36 8 50 10.4 16 110 49 -37 30 6 -37 19 6 -37 35 24 -37 13 49 0.57 58 0 0 -37 51 28 8 50 13.2 17 109 48 -37 56 58 -37 45 58 -38 2 15 -37 40 42 0.57 59 0 0 -38 18 4 8 50 16.1 18 109 47 -38 23 34 -38 12 34 -38 28 50 -38 7 19 0.57 60 0 0 -38 44 24 8 50 19.1 18 108 47 -38 49 53 -38 38 54 -38 55 9 -38 33 39 0.57 61 0 0 -39 10 26 8 50 22.3 19 107 46 -39 15 55 -39 4 58 -39 21 11 -38 59 43 0.57 62 0 0 -39 36 12 8 50 25.6 20 107 45 -39 41 40 -39 30 43 -39 46 55 -39 25 29 0.57 63 0 0 -40 1 39 8 50 29.0 21 106 45 -40 7 7 -39 56 11 -40 12 22 -39 50 57 0.57 64 0 0 -40 26 48 8 50 32.5 22 105 44 -40 32 15 -40 21 20 -40 37 29 -40 16 7 0.57 65 0 0 -40 51 37 8 50 36.1 23 104 43 -40 57 4 -40 46 11 -41 2 18 -40 40 58 0.57 66 0 0 -41 16 8 8 50 39.8 24 104 42 -41 21 34 -41 10 42 -41 26 48 -41 5 29 0.57 67 0 0 -41 40 19 8 50 43.6 24 103 42 -41 45 44 -41 34 53 -41 50 57 -41 29 41 0.57 68 0 0 -42 4 9 8 50 47.5 25 102 41 -42 9 34 -41 58 44 -42 14 46 -41 53 33 0.57 69 0 0 -42 27 39 8 50 51.4 26 101 40 -42 33 4 -42 22 15 -42 38 15 -42 17 4 0.57 70 0 0 -42 50 49 8 50 55.5 27 101 40 -42 56 12 -42 45 25 -43 1 23 -42 40 15 0.57 71 0 0 -43 13 37 8 50 59.7 28 100 39 -43 19 0 -43 8 14 -43 24 10 -43 3 5 0.57 72 0 0 -43 36 4 8 51 3.9 28 99 38 -43 41 26 -43 30 42 -43 46 36 -43 25 33 0.57 73 0 0 -43 58 9 8 51 8.2 29 98 37 -44 3 31 -43 52 48 -44 8 39 -43 47 40 0.57 74 0 0 -44 19 52 8 51 12.6 30 97 37 -44 25 13 -44 14 32 -44 30 21 -44 9 25 0.57 75 0 0 -44 41 14 8 51 17.0 31 96 36 -44 46 34 -44 35 54 -44 51 41 -44 30 48 0.57 76 0 0 -45 2 13 8 51 21.5 32 95 35 -45 7 33 -44 56 54 -45 12 39 -44 51 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19 252 -60 -32 27 28 -32 16 23 -32 32 47 -32 11 5 0.60 -134 0 0 -31 52 32 9 4 57.0 18 251 -61 -31 58 5 -31 47 0 -32 3 24 -31 41 42 0.60 -133 0 0 -31 23 2 9 5 0.2 17 250 -61 -31 28 35 -31 17 30 -31 33 54 -31 12 12 0.61 -132 0 0 -30 53 26 9 5 3.3 16 250 -61 -30 58 59 -30 47 54 -31 4 18 -30 42 36 0.61 -131 0 0 -30 23 46 9 5 6.2 15 249 -62 -30 29 18 -30 18 14 -30 34 37 -30 12 56 0.61 -130 0 0 -29 54 1 9 5 8.9 14 249 -62 -29 59 33 -29 48 29 -30 4 52 -29 43 12 0.61 -129 0 0 -29 24 13 9 5 11.5 13 248 -62 -29 29 45 -29 18 42 -29 35 3 -29 13 25 0.62 -128 0 0 -28 54 23 9 5 13.8 12 248 -62 -28 59 55 -28 48 52 -29 5 13 -28 43 35 0.62 -127 0 0 -28 24 32 9 5 16.0 11 247 -63 -28 30 4 -28 19 2 -28 35 21 -28 13 45 0.62 -126 0 0 -27 54 41 9 5 18.0 10 247 -63 -28 0 12 -27 49 11 -28 5 29 -27 43 54 0.63 -125 0 0 -27 24 51 9 5 19.9 9 246 -63 -27 30 21 -27 19 21 -27 35 38 -27 14 4 0.63 -124 0 0 -26 55 2 9 5 21.5 8 246 -63 -27 0 31 -26 49 32 -27 5 48 -26 44 16 0.64 -123 0 0 -26 25 15 9 5 22.9 7 245 -63 -26 30 45 -26 19 46 -26 36 1 -26 14 31 0.65 -122 0 0 -25 55 32 9 5 24.2 6 245 -62 -26 1 1 -25 50 3 -26 6 17 -25 44 48 0.66 -121 0 0 -25 25 53 9 5 25.2 5 244 -62 -25 31 22 -25 20 25 -25 36 37 -25 15 11 0.68 -120 0 0 -24 56 20 9 5 26.1 4 244 -62 -25 1 48 -24 50 52 -25 7 3 -24 45 38 0.71 -119 0 0 -24 26 52 9 5 26.8 3 244 -62 -24 32 20 -24 21 25 -24 37 34 -24 16 12 0.76 -118 0 0 -23 57 32 9 5 27.2 2 243 -62 -24 2 59 -23 52 6 -24 8 13 -23 46 53 0.86 -117 0 0 -23 28 20 9 5 27.5 1 243 -61 -23 33 46 -23 22 54 -23 38 59 -23 17 41 1.28 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 6847-02535-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 11 43.7437 DE: -25 14 02.194 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 11 43.7436 DE: -25 14 02.194 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.3 * B mag [mag]: 11.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (7896) Svejk asteroid class: approx. diameter [km]: 15 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.81500 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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): 0.017", 0.003", 91.253° remarks: * orbital elements for (7896)Svejk : Mean anomaly = 83.4130193850 deg Arg. of pericenter = 139.3535995742 deg Long. of node = 52.3196606424 deg Inclination = 1.9065288780 deg Eccentricity = 0.1388767912 Semimajor axis = 3.1385693313 AU Perihelion dist = 2.7026948936 AU Mag: H = 12.74, G = 0.15 Epoch of elements : MJD 60568.37334609 TDT (2024 Sep 15.3733) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr25,1.30,2024,9,15,8.960319,0.031142,-0.487536,6.659743,0.426045,0.005650,0.000164,0.000000,0.000000 144.0921,-25.2293,44.37,2.77,False TYC 6847-02535-1,18.19548438,-25.2339427,11.42,11.32,11.27,0.0,0,,18.22093709,-25.2292753,7.11,6.71,0,0,0 7896,Svejk,18.42,15.340,2.8150,0,0,1.534,1.33,,1.6,0 0,83.3468,2024,9,15,139.3536,52.3197,1.9065,0.13888,3.13857,2.70269,12.74,5.0,0.15 1.480,0.0173,0.0033,91,0.0036,Known errors,0.59,0,-1,-1 20240915_2535-1,60140.56 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:31 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org