IOTA/IOTA-ES occultation update for (7796) Jaracimrman / UCAC4 306-283704 event on 2024 Sep 20, 01:57 UT Visible from Summary ------- On 2024 Sep 20 UT, the 11.674 km diameter asteroid (7796) Jaracimrman will occult a 11.2 mag star in the constellation Piscis Austrinus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.24 mag to 18.40 mag (the magnitude of the asteroid) for at most 1.340 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 Sep 20, 01:45 - 2024 Sep 20, 02:09 * geocentric midpoint of event [JD]: 2460573.58163216 * magnitude of target star: 11.16 * magnitude drop [mag]: 7.24 * estimated maximum duration [s]: 1.340 * Moon: 94 % sunlit, 66° distance * Sun: 141° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 0.31 * 1 sigma uncertainty interval [seconds]: +/- 2.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.002", 80°) * approx speed of asteroid's shadow [km/s]: 8.7048 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 306-283704 by 7796 Jaracimrman on 2024 Sep 20 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 -159 0 0 -12 13 1 2 9 41.0 0 120 34 -12 9 22 -12 16 41 .. .. .. -12 18 56 .... -158 0 0 -12 46 22 2 9 40.9 1 119 33 -12 42 43 -12 50 1 -12 40 27 -12 52 16 0.19 -157 0 0 -13 19 28 2 9 40.4 2 119 32 -13 15 49 -13 23 6 -13 13 34 -13 25 22 0.14 -156 0 0 -13 52 19 2 9 39.7 3 119 31 -13 48 40 -13 55 57 -13 46 25 -13 58 12 0.12 -155 0 0 -14 24 54 2 9 38.7 4 119 30 -14 21 16 -14 28 32 -14 19 1 -14 30 47 0.11 -154 0 0 -14 57 13 2 9 37.5 6 118 29 -14 53 35 -15 0 50 -14 51 20 -15 3 5 0.11 -153 0 0 -15 29 14 2 9 35.9 7 118 28 -15 25 37 -15 32 51 -15 23 22 -15 35 6 0.11 -152 0 0 -16 0 57 2 9 34.2 8 118 26 -15 57 20 -16 4 35 -15 55 6 -16 6 49 0.10 -151 0 0 -16 32 22 2 9 32.1 9 118 25 -16 28 46 -16 35 59 -16 26 31 -16 38 13 0.10 -150 0 0 -17 3 28 2 9 29.8 10 117 24 -16 59 51 -17 7 4 -16 57 38 -17 9 18 0.10 -149 0 0 -17 34 13 2 9 27.3 11 117 23 -17 30 37 -17 37 49 -17 28 24 -17 40 3 0.10 -148 0 0 -18 4 39 2 9 24.6 12 117 22 -18 1 3 -18 8 14 -17 58 50 -18 10 28 0.10 -147 0 0 -18 34 43 2 9 21.6 13 116 21 -18 31 8 -18 38 18 -18 28 54 -18 40 31 0.10 -146 0 0 -19 4 25 2 9 18.3 14 116 20 -19 0 51 -19 8 0 -18 58 38 -19 10 13 0.10 -145 0 0 -19 33 46 2 9 14.9 15 116 19 -19 30 12 -19 37 20 -19 27 59 -19 39 33 0.10 -144 0 0 -20 2 44 2 9 11.2 16 115 18 -19 59 10 -20 6 18 -19 56 58 -20 8 30 0.10 -143 0 0 -20 31 19 2 9 7.3 17 115 17 -20 27 46 -20 34 53 -20 25 34 -20 37 5 0.10 -142 0 0 -20 59 31 2 9 3.3 18 115 16 -20 55 58 -21 3 4 -20 53 47 -21 5 16 0.10 -141 0 0 -21 27 20 2 8 59.0 19 114 16 -21 23 47 -21 30 52 -21 21 36 -21 33 4 0.10 -140 0 0 -21 54 44 2 8 54.5 20 114 15 -21 51 12 -21 58 16 -21 49 1 -22 0 27 0.10 -139 0 0 -22 21 44 2 8 49.8 21 114 14 -22 18 13 -22 25 15 -22 16 2 -22 27 26 0.10 -138 0 0 -22 48 19 2 8 45.0 22 113 13 -22 44 48 -22 51 50 -22 42 38 -22 54 1 0.10 -137 0 0 -23 14 30 2 8 39.9 23 113 12 -23 10 59 -23 18 0 -23 8 49 -23 20 11 0.10 -136 0 0 -23 40 15 2 8 34.7 24 112 11 -23 36 45 -23 43 45 -23 34 35 -23 45 55 0.10 -135 0 0 -24 5 36 2 8 29.4 25 112 10 -24 2 6 -24 9 5 -23 59 56 -24 11 15 0.10 -134 0 0 -24 30 30 2 8 23.8 26 111 9 -24 27 1 -24 33 59 -24 24 52 -24 36 9 0.10 -133 0 0 -24 54 59 2 8 18.1 27 111 8 -24 51 30 -24 58 28 -24 49 21 -25 0 37 0.10 -132 0 0 -25 19 2 2 8 12.3 28 111 7 -25 15 34 -25 22 30 -25 13 25 -25 24 39 0.10 -131 0 0 -25 42 39 2 8 6.3 29 110 6 -25 39 11 -25 46 7 -25 37 3 -25 48 15 0.10 -130 0 0 -26 5 50 2 8 0.2 30 110 5 -26 2 23 -26 9 17 -26 0 15 -26 11 25 0.10 -129 0 0 -26 28 35 2 7 53.9 31 109 4 -26 25 8 -26 32 1 -26 23 0 -26 34 9 0.10 -128 0 0 -26 50 53 2 7 47.5 32 109 3 -26 47 27 -26 54 19 -26 45 20 -26 56 27 0.10 -127 0 0 -27 12 45 2 7 41.0 33 108 3 -27 9 20 -27 16 11 -27 7 12 -27 18 18 0.10 -126 0 0 -27 34 11 2 7 34.3 34 108 2 -27 30 46 -27 37 36 -27 28 39 -27 39 43 0.10 -125 0 0 -27 55 10 2 7 27.5 35 107 1 -27 51 45 -27 58 35 -27 49 39 -28 0 41 0.10 -124 0 0 -28 15 43 2 7 20.6 36 107 0 -28 12 19 -28 19 7 -28 10 12 -28 21 13 0.10 -123 0 0 -28 35 49 2 7 13.6 37 106 -1 -28 32 25 -28 39 13 -28 30 19 -28 41 19 0.10 -122 0 0 -28 55 29 2 7 6.5 38 106 -2 -28 52 6 -28 58 52 -28 50 0 -29 0 58 0.10 -121 0 0 -29 14 42 2 6 59.3 39 105 -3 -29 11 20 -29 18 5 -29 9 14 -29 20 10 0.10 -120 0 0 -29 33 29 2 6 52.0 39 105 -3 -29 30 7 -29 36 51 -29 28 2 -29 38 56 0.10 -119 0 0 -29 51 49 2 6 44.6 40 104 -4 -29 48 28 -29 55 11 -29 46 23 -29 57 16 0.10 -118 0 0 -30 9 44 2 6 37.1 41 104 -5 -30 6 22 -30 13 5 -30 4 18 -30 15 9 0.10 -117 0 0 -30 27 11 2 6 29.5 42 103 -6 -30 23 51 -30 30 32 -30 21 46 -30 32 36 0.10 -116 0 0 -30 44 13 2 6 21.8 43 102 -7 -30 40 52 -30 47 33 -30 38 48 -30 49 37 0.10 -115 0 0 -31 0 48 2 6 14.1 44 102 -8 -30 57 28 -31 4 8 -30 55 24 -31 6 12 0.11 -114 0 0 -31 16 57 2 6 6.2 45 101 -8 -31 13 38 -31 20 17 -31 11 34 -31 22 20 0.11 -113 0 0 -31 32 40 2 5 58.3 46 101 -9 -31 29 21 -31 35 59 -31 27 18 -31 38 3 0.11 -112 0 0 -31 47 57 2 5 50.3 46 100 -10 -31 44 39 -31 51 16 -31 42 36 -31 53 19 0.11 -111 0 0 -32 2 48 2 5 42.2 47 99 -11 -31 59 30 -32 6 7 -31 57 27 -32 8 9 0.11 -110 0 0 -32 17 14 2 5 34.1 48 99 -12 -32 13 56 -32 20 32 -32 11 53 -32 22 34 0.11 -109 0 0 -32 31 13 2 5 25.9 49 98 -12 -32 27 56 -32 34 31 -32 25 54 -32 36 33 0.11 -108 0 0 -32 44 47 2 5 17.6 50 97 -13 -32 41 30 -32 48 4 -32 39 28 -32 50 6 0.11 -107 0 0 -32 57 56 2 5 9.3 51 97 -14 -32 54 39 -33 1 12 -32 52 37 -33 3 14 0.11 -106 0 0 -33 10 38 2 5 0.9 51 96 -15 -33 7 22 -33 13 55 -33 5 20 -33 15 56 0.11 -105 0 0 -33 22 56 2 4 52.5 52 95 -15 -33 19 40 -33 26 12 -33 17 39 -33 28 13 0.11 -104 0 0 -33 34 48 2 4 44.0 53 95 -16 -33 31 32 -33 38 4 -33 29 31 -33 40 5 0.11 -103 0 0 -33 46 15 2 4 35.4 54 94 -17 -33 43 0 -33 49 31 -33 40 59 -33 51 32 0.11 -102 0 0 -33 57 17 2 4 26.8 55 93 -18 -33 54 2 -34 0 32 -33 52 1 -34 2 33 0.11 -101 0 0 -34 7 54 2 4 18.2 56 93 -18 -34 4 39 -34 11 9 -34 2 39 -34 13 10 0.11 -100 0 0 -34 18 6 2 4 9.5 56 92 -19 -34 14 52 -34 21 21 -34 12 52 -34 23 21 0.11 - 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9 37 45 1 46 13.6 21 243 -46 - 9 34 6 - 9 41 23 - 9 31 50 - 9 43 39 0.10 16 0 0 - 9 4 17 1 46 8.6 20 243 -45 - 9 0 38 - 9 7 55 - 8 58 22 - 9 10 11 0.10 17 0 0 - 8 30 41 1 46 3.9 19 242 -44 - 8 27 2 - 8 34 20 - 8 24 47 - 8 36 36 0.10 18 0 0 - 7 56 59 1 45 59.4 18 242 -44 - 7 53 20 - 8 0 38 - 7 51 5 - 8 2 54 0.10 19 0 0 - 7 23 12 1 45 55.2 16 242 -43 - 7 19 33 - 7 26 51 - 7 17 17 - 7 29 6 0.10 20 0 0 - 6 49 20 1 45 51.2 15 242 -42 - 6 45 40 - 6 52 59 - 6 43 25 - 6 55 14 0.10 21 0 0 - 6 15 24 1 45 47.5 14 242 -41 - 6 11 45 - 6 19 3 - 6 9 29 - 6 21 19 0.10 22 0 0 - 5 41 25 1 45 44.1 13 242 -40 - 5 37 46 - 5 45 4 - 5 35 30 - 5 47 20 0.11 23 0 0 - 5 7 25 1 45 41.0 12 242 -39 - 5 3 46 - 5 11 4 - 5 1 30 - 5 13 20 0.11 24 0 0 - 4 33 24 1 45 38.1 11 241 -38 - 4 29 45 - 4 37 3 - 4 27 29 - 4 39 19 0.11 25 0 0 - 3 59 23 1 45 35.5 10 241 -37 - 3 55 44 - 4 3 2 - 3 53 29 - 4 5 18 0.11 26 0 0 - 3 25 24 1 45 33.2 8 241 -36 - 3 21 45 - 3 29 3 - 3 19 29 - 3 31 18 0.11 27 0 0 - 2 51 26 1 45 31.2 7 241 -35 - 2 47 47 - 2 55 5 - 2 45 32 - 2 57 21 0.12 28 0 0 - 2 17 32 1 45 29.5 6 241 -34 - 2 13 53 - 2 21 11 - 2 11 38 - 2 23 26 0.12 29 0 0 - 1 43 42 1 45 28.0 5 241 -33 - 1 40 4 - 1 47 21 - 1 37 48 - 1 49 36 0.13 30 0 0 - 1 9 58 1 45 26.9 4 241 -32 - 1 6 19 - 1 13 36 - 1 4 4 - 1 15 52 0.14 31 0 0 - 0 36 20 1 45 26.0 3 241 -31 - 0 32 41 - 0 39 58 - 0 30 26 - 0 42 13 0.17 32 0 0 - 0 2 48 1 45 25.5 2 241 -30 0 0 50 - 0 6 27 0 3 5 - 0 8 42 0.22 33 0 0 0 30 34 1 45 25.2 0 241 -29 0 34 12 0 26 56 0 36 27 0 24 42 0.52 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 306-283704 * constellation : Piscis Austrinus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 57 07.2053 DE: -28 56 24.160 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 57 07.2053 DE: -28 56 24.160 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.2 * B mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (7796) Jaracimrman asteroid class: approx. diameter [km]: 12 approx. diameter ["]: 0.007 distance from Earth [AU]: 2.17580 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 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): 0.014", 0.002", 79.718° remarks: * orbital elements for (7796)Jaracimrman : Mean anomaly = 203.4413013790 deg Arg. of pericenter = 41.8238166903 deg Long. of node = 93.7884225481 deg Inclination = 12.8210871242 deg Eccentricity = 0.1450556711 Semimajor axis = 2.6634383506 AU Perihelion dist = 2.2770915132 AU Mag: H = 13.59, G = 0.15 Epoch of elements : MJD 60573.08163200 TDT (2024 Sep 20.0816) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Apr25,1.34,2024,9,20,1.959172,0.014578,-0.112496,-4.872773,-0.629047,0.002686,0.002345,0.000001,0.000000 -59.2042,-28.8223,148.96,0.95,False UCAC4 306-283704,21.95200148,-28.9400443,11.73,11.16,10.85,0.0,0,,21.97607597,-28.8223362,7.24,7.10,0,0,0 7796,Jaracimrman,18.40,11.674,2.1758,0,0,-1.498,-2.54,,1.0,0 0,203.1960,2024,9,19,41.8238,93.7884,12.8211,0.14506,2.66344,2.27709,13.58,5.0,0.15 1.309,0.0137,0.0022,80,0.0023,Known errors,1.02,0,-1,-1 20240920_283704,60140.57 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org