IOTA/IOTA-ES occultation update for (4369) Seifert / UCAC4 408-140706 event on 2024 Dec 20, 18:51 UT Visible from Summary ------- On 2024 Dec 20 UT, the 16.071 km diameter asteroid (4369) Seifert will occult a 11.4 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 5.35 mag to 16.76 mag (the magnitude of the asteroid) for at most 0.410 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 Dec 20, 18:48 - 2024 Dec 20, 18:54 * geocentric midpoint of event [JD]: 2460665.28571037 * magnitude of target star: 11.42 * magnitude drop [mag]: 5.35 * estimated maximum duration [s]: 0.410 * Moon: 70 % sunlit, 162° distance * Sun: 51° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 16 * 1 sigma uncertainty interval [path widths]: +/- 0.32 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.001", 59°) * approx speed of asteroid's shadow [km/s]: 39.0302 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 408-140706 by 4369 Seifert on 2024 Dec 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 -145 0 0 -27 57 3 18 48 43.6 1 99 52 -28 1 30 -27 52 36 -28 4 18 -27 49 47 .... -144 0 0 -28 5 30 18 48 43.6 2 99 53 -28 9 57 -28 1 4 -28 12 46 -27 58 15 0.13 -143 0 0 -28 13 38 18 48 43.7 2 98 54 -28 18 4 -28 9 11 -28 20 52 -28 6 23 0.13 -142 0 0 -28 21 24 18 48 43.9 3 98 54 -28 25 50 -28 16 58 -28 28 39 -28 14 10 0.13 -141 0 0 -28 28 50 18 48 44.0 4 97 55 -28 33 16 -28 24 24 -28 36 4 -28 21 36 0.13 -140 0 0 -28 35 55 18 48 44.2 5 97 56 -28 40 21 -28 31 30 -28 43 9 -28 28 42 0.13 -139 0 0 -28 42 40 18 48 44.5 6 96 57 -28 47 6 -28 38 15 -28 49 54 -28 35 27 0.13 -138 0 0 -28 49 4 18 48 44.8 7 96 58 -28 53 29 -28 44 39 -28 56 17 -28 41 51 0.13 -137 0 0 -28 55 7 18 48 45.1 8 95 59 -28 59 33 -28 50 42 -29 2 20 -28 47 55 0.13 -136 0 0 -29 0 50 18 48 45.5 9 95 60 -29 5 15 -28 56 25 -29 8 2 -28 53 38 0.13 -135 0 0 -29 6 12 18 48 45.9 10 94 61 -29 10 37 -29 1 47 -29 13 24 -28 59 0 0.13 -134 0 0 -29 11 13 18 48 46.3 10 94 61 -29 15 37 -29 6 48 -29 18 25 -29 4 1 0.13 -133 0 0 -29 15 53 18 48 46.8 11 93 62 -29 20 18 -29 11 29 -29 23 5 -29 8 42 0.13 -132 0 0 -29 20 13 18 48 47.3 12 93 63 -29 24 37 -29 15 49 -29 27 24 -29 13 2 0.13 -131 0 0 -29 24 11 18 48 47.9 13 92 64 -29 28 36 -29 19 47 -29 31 23 -29 17 0 0.13 -130 0 0 -29 27 49 18 48 48.4 14 92 65 -29 32 13 -29 23 25 -29 35 0 -29 20 39 0.13 -129 0 0 -29 31 6 18 48 49.1 15 91 66 -29 35 30 -29 26 43 -29 38 17 -29 23 56 0.13 -128 0 0 -29 34 3 18 48 49.7 16 91 67 -29 38 26 -29 29 39 -29 41 13 -29 26 52 0.13 -127 0 0 -29 36 38 18 48 50.4 17 90 67 -29 41 2 -29 32 14 -29 43 48 -29 29 28 0.13 -126 0 0 -29 38 52 18 48 51.2 17 90 68 -29 43 16 -29 34 29 -29 46 3 -29 31 42 0.13 -125 0 0 -29 40 46 18 48 51.9 18 89 69 -29 45 10 -29 36 23 -29 47 56 -29 33 36 0.13 -124 0 0 -29 42 19 18 48 52.7 19 89 70 -29 46 42 -29 37 55 -29 49 29 -29 35 9 0.13 -123 0 0 -29 43 31 18 48 53.6 20 88 71 -29 47 54 -29 39 7 -29 50 41 -29 36 21 0.13 -122 0 0 -29 44 22 18 48 54.5 21 88 72 -29 48 45 -29 39 58 -29 51 32 -29 37 12 0.13 -121 0 0 -29 44 52 18 48 55.4 22 87 72 -29 49 15 -29 40 28 -29 52 2 -29 37 42 0.13 -120 0 0 -29 45 1 18 48 56.3 23 87 73 -29 49 24 -29 40 38 -29 52 11 -29 37 51 0.13 -119 0 0 -29 44 49 18 48 57.3 24 86 74 -29 49 13 -29 40 26 -29 51 59 -29 37 39 0.13 -118 0 0 -29 44 17 18 48 58.3 24 86 75 -29 48 40 -29 39 53 -29 51 26 -29 37 7 0.13 -117 0 0 -29 43 23 18 48 59.4 25 85 76 -29 47 46 -29 38 59 -29 50 33 -29 36 13 0.13 -116 0 0 -29 42 8 18 49 0.5 26 85 76 -29 46 32 -29 37 45 -29 49 18 -29 34 58 0.13 -115 0 0 -29 40 33 18 49 1.6 27 84 77 -29 44 56 -29 36 9 -29 47 43 -29 33 23 0.13 -114 0 0 -29 38 36 18 49 2.8 28 84 78 -29 43 0 -29 34 13 -29 45 46 -29 31 26 0.13 -113 0 0 -29 36 19 18 49 3.9 29 83 79 -29 40 42 -29 31 55 -29 43 29 -29 29 8 0.13 -112 0 0 -29 33 40 18 49 5.2 30 83 80 -29 38 4 -29 29 17 -29 40 51 -29 26 30 0.13 -111 0 0 -29 30 41 18 49 6.4 30 82 80 -29 35 5 -29 26 17 -29 37 51 -29 23 30 0.13 -110 0 0 -29 27 20 18 49 7.7 31 82 81 -29 31 44 -29 22 56 -29 34 31 -29 20 9 0.13 -109 0 0 -29 23 39 18 49 9.1 32 81 82 -29 28 3 -29 19 15 -29 30 50 -29 16 28 0.13 -108 0 0 -29 19 36 18 49 10.4 33 80 82 -29 24 0 -29 15 12 -29 26 47 -29 12 25 0.13 -107 0 0 -29 15 13 18 49 11.8 34 80 83 -29 19 37 -29 10 48 -29 22 24 -29 8 1 0.13 -106 0 0 -29 10 28 18 49 13.3 35 79 83 -29 14 53 -29 6 4 -29 17 40 -29 3 16 0.13 -105 0 0 -29 5 22 18 49 14.7 36 79 84 -29 9 47 -29 0 58 -29 12 35 -28 58 11 0.13 -104 0 0 -28 59 56 18 49 16.3 37 78 84 -29 4 21 -28 55 31 -29 7 8 -28 52 44 0.13 -103 0 0 -28 54 8 18 49 17.8 38 78 84 -28 58 33 -28 49 43 -29 1 21 -28 46 56 0.13 -102 0 0 -28 47 59 18 49 19.4 38 77 84 -28 52 25 -28 43 34 -28 55 12 -28 40 47 0.13 -101 0 0 -28 41 30 18 49 21.0 39 77 84 -28 45 55 -28 37 4 -28 48 43 -28 34 16 0.13 -100 0 0 -28 34 39 18 49 22.6 40 76 84 -28 39 5 -28 30 13 -28 41 53 -28 27 25 0.13 - 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0 12 50 - 0 3 25 - 0 15 49 - 0 0 26 0.14 - 10 0 0 0 14 58 18 53 15.2 47 257 -4 0 10 15 0 19 40 0 7 17 0 22 39 0.14 - 9 0 0 0 37 52 18 53 17.4 46 257 -5 0 33 10 0 42 34 0 30 12 0 45 33 0.14 - 8 0 0 1 0 35 18 53 19.6 45 257 -6 0 55 53 1 5 17 0 52 55 1 8 15 0.14 - 7 0 0 1 23 6 18 53 21.8 44 257 -7 1 18 24 1 27 48 1 15 26 1 30 46 0.14 - 6 0 0 1 45 24 18 53 23.9 43 257 -8 1 40 43 1 50 6 1 37 45 1 53 3 0.14 - 5 0 0 2 7 30 18 53 25.9 42 257 -9 2 2 49 2 12 11 1 59 51 2 15 8 0.14 - 4 0 0 2 29 22 18 53 28.0 40 257 -10 2 24 41 2 34 2 2 21 43 2 36 59 0.14 - 3 0 0 2 50 59 18 53 29.9 39 257 -11 2 46 19 2 55 40 2 43 22 2 58 37 0.14 - 2 0 0 3 12 23 18 53 31.9 38 257 -12 3 7 43 3 17 3 3 4 46 3 20 0 0.14 - 1 0 0 3 33 32 18 53 33.7 37 257 -13 3 28 52 3 38 11 3 25 55 3 41 8 0.14 0 0 0 3 54 25 18 53 35.6 36 257 -14 3 49 46 3 59 4 3 46 49 4 2 1 0.14 1 0 0 4 15 3 18 53 37.3 35 257 -15 4 10 24 4 19 42 4 7 28 4 22 38 0.14 2 0 0 4 35 25 18 53 39.1 34 257 -16 4 30 47 4 40 4 4 27 50 4 43 0 0.14 3 0 0 4 55 31 18 53 40.8 33 257 -17 4 50 52 5 0 9 4 47 57 5 3 4 0.14 4 0 0 5 15 19 18 53 42.4 32 257 -19 5 10 42 5 19 57 5 7 46 5 22 53 0.14 5 0 0 5 34 51 18 53 44.0 31 257 -20 5 30 14 5 39 28 5 27 18 5 42 24 0.14 6 0 0 5 54 5 18 53 45.5 30 257 -21 5 49 28 5 58 42 5 46 33 6 1 37 0.14 7 0 0 6 13 2 18 53 47.0 29 257 -22 6 8 25 6 17 38 6 5 30 6 20 33 0.14 8 0 0 6 31 40 18 53 48.4 28 257 -23 6 27 4 6 36 17 6 24 9 6 39 11 0.14 9 0 0 6 50 0 18 53 49.8 27 257 -24 6 45 25 6 54 36 6 42 30 6 57 31 0.14 10 0 0 7 8 2 18 53 51.1 26 257 -25 7 3 26 7 12 37 7 0 32 7 15 31 0.14 11 0 0 7 25 44 18 53 52.4 25 257 -26 7 21 9 7 30 19 7 18 15 7 33 13 0.14 12 0 0 7 43 8 18 53 53.6 24 257 -27 7 38 33 7 47 42 7 35 39 7 50 36 0.14 13 0 0 8 0 12 18 53 54.8 23 257 -28 7 55 37 8 4 46 7 52 44 8 7 39 0.14 14 0 0 8 16 56 18 53 55.9 22 258 -29 8 12 22 8 21 30 8 9 29 8 24 23 0.14 15 0 0 8 33 20 18 53 57.0 21 258 -30 8 28 47 8 37 54 8 25 54 8 40 47 0.14 16 0 0 8 49 25 18 53 58.0 20 258 -31 8 44 51 8 53 58 8 41 59 8 56 50 0.14 17 0 0 9 5 9 18 53 58.9 19 258 -32 9 0 36 9 9 41 8 57 43 9 12 34 0.14 18 0 0 9 20 32 18 53 59.8 17 258 -33 9 16 0 9 25 4 9 13 7 9 27 56 0.14 19 0 0 9 35 35 18 54 0.7 16 258 -34 9 31 3 9 40 7 9 28 11 9 42 59 0.14 20 0 0 9 50 17 18 54 1.5 15 258 -35 9 45 45 9 54 48 9 42 53 9 57 40 0.14 21 0 0 10 4 37 18 54 2.3 14 259 -36 10 0 6 10 9 9 9 57 15 10 12 0 0.15 22 0 0 10 18 37 18 54 3.0 13 259 -37 10 14 6 10 23 8 10 11 15 10 25 59 0.15 23 0 0 10 32 15 18 54 3.6 12 259 -38 10 27 45 10 36 46 10 24 54 10 39 37 0.15 24 0 0 10 45 32 18 54 4.2 11 259 -39 10 41 2 10 50 2 10 38 11 10 52 53 0.15 25 0 0 10 58 27 18 54 4.7 10 259 -40 10 53 57 11 2 57 10 51 7 11 5 48 0.15 26 0 0 11 11 1 18 54 5.2 9 259 -41 11 6 31 11 15 30 11 3 41 11 18 21 0.15 27 0 0 11 23 12 18 54 5.7 8 260 -42 11 18 43 11 27 42 11 15 53 11 30 32 0.15 28 0 0 11 35 2 18 54 6.1 7 260 -43 11 30 33 11 39 31 11 27 43 11 42 21 0.15 29 0 0 11 46 30 18 54 6.4 6 260 -44 11 42 1 11 50 58 11 39 11 11 53 48 0.16 30 0 0 11 57 35 18 54 6.7 5 260 -45 11 53 7 12 2 4 11 50 17 12 4 53 0.16 31 0 0 12 8 19 18 54 7.0 4 260 -46 12 3 51 12 12 46 12 1 1 12 15 36 0.16 32 0 0 12 18 39 18 54 7.2 3 261 -47 12 14 12 12 23 7 12 11 22 12 25 56 0.17 33 0 0 12 28 38 18 54 7.3 2 261 -48 12 24 11 12 33 5 12 21 21 12 35 54 0.19 34 0 0 12 38 14 18 54 7.4 1 261 -49 12 33 47 12 42 41 12 30 58 12 45 30 0.22 35 0 0 12 47 28 18 54 7.4 0 261 -50 12 43 1 12 51 55 12 40 12 12 54 43 0.42 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 408-140706 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 21 33.0817 DE: -08 28 04.800 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 21 33.0817 DE: -08 28 04.800 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.4 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4369) Seifert asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.48200 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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): 0.014", 0.001", 59.208° remarks: * orbital elements for (4369)Seifert : Mean anomaly = 340.3895597725 deg Arg. of pericenter = 77.0482430860 deg Long. of node = 299.2835089086 deg Inclination = 11.8283262822 deg Eccentricity = 0.2513215484 Semimajor axis = 2.6096746604 AU Perihelion dist = 1.9538071839 AU Mag: H = 12.19, G = 0.15 Epoch of elements : MJD 60664.78571021 TDT (2024 Dec 20.7857) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,0.41,2024,12,20,18.857049,0.045373,-0.123223,20.640286,7.699833,0.003956,0.001706,-0.000001,0.000000 -51.9845,-8.3628,-103.37,-23.44,False UCAC4 408-140706,21.35918942,-8.4679995,11.96,11.42,11.13,0.0,0,,21.38115501,-8.3628415,5.35,5.19,0,0,0 4369,Seifert,16.76,16.071,2.4820,0,0,4.928,27.28,,1.6,0 0,340.2059,2024,12,20,77.0482,299.2835,11.8283,0.25132,2.60967,1.95381,12.19,5.0,0.15 1.316,0.0137,0.0014,59,0.0028,Known errors,1.04,0,-1,-1 20241220_140706,60140.75 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org