IOTA/IOTA-ES occultation update for (1888) Zu / TYC 5788-00461-1 event on 2024 Dec 26, 18:41 UT Visible from Summary ------- On 2024 Dec 26 UT, the 11.6939625806343 km diameter asteroid (1888) Zu will occult a 9.9 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 7.63 mag to 17.56 mag (the magnitude of the asteroid) for at most 0.340 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 Dec 26, 18:38 - 2024 Dec 26, 18:44 * geocentric midpoint of event [JD]: 2460671.27857133 * magnitude of target star: 9.93 * magnitude drop [mag]: 7.63 * estimated maximum duration [s]: 0.340 * Moon: 17 % sunlit, 100° distance * Sun: 51° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 0.32 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.002", 72°) * approx speed of asteroid's shadow [km/s]: 34.6506 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5788-00461-1 by 1888 Zu on 2024 Dec 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 ' " Latitude Latitude Latitude Latitude -142 0 0 -27 31 46 18 38 7.8 1 99 51 -27 35 6 -27 28 26 -27 37 14 -27 26 18 .... -141 0 0 -27 40 4 18 38 7.9 2 98 52 -27 43 25 -27 36 44 -27 45 32 -27 34 37 0.18 -140 0 0 -27 48 6 18 38 8.0 2 98 53 -27 51 26 -27 44 46 -27 53 34 -27 42 39 0.18 -139 0 0 -27 55 51 18 38 8.1 3 97 54 -27 59 11 -27 52 31 -28 1 18 -27 50 24 0.19 -138 0 0 -28 3 19 18 38 8.3 4 97 55 -28 6 38 -27 59 59 -28 8 46 -27 57 52 0.19 -137 0 0 -28 10 29 18 38 8.6 5 97 56 -28 13 49 -28 7 10 -28 15 56 -28 5 3 0.19 -136 0 0 -28 17 23 18 38 8.9 6 96 57 -28 20 42 -28 14 4 -28 22 50 -28 11 57 0.19 -135 0 0 -28 24 0 18 38 9.2 7 96 58 -28 27 19 -28 20 40 -28 29 26 -28 18 33 0.19 -134 0 0 -28 30 19 18 38 9.6 8 95 58 -28 33 38 -28 27 0 -28 35 45 -28 24 53 0.19 -133 0 0 -28 36 21 18 38 10.0 9 95 59 -28 39 40 -28 33 2 -28 41 47 -28 30 55 0.19 -132 0 0 -28 42 5 18 38 10.4 10 94 60 -28 45 24 -28 38 47 -28 47 31 -28 36 40 0.19 -131 0 0 -28 47 33 18 38 10.9 10 94 61 -28 50 52 -28 44 14 -28 52 58 -28 42 7 0.19 -130 0 0 -28 52 43 18 38 11.5 11 93 62 -28 56 1 -28 49 24 -28 58 8 -28 47 18 0.19 -129 0 0 -28 57 35 18 38 12.1 12 93 63 -29 0 54 -28 54 17 -29 3 1 -28 52 10 0.19 -128 0 0 -29 2 10 18 38 12.7 13 92 64 -29 5 29 -28 58 52 -29 7 35 -28 56 46 0.19 -127 0 0 -29 6 28 18 38 13.4 14 92 64 -29 9 46 -29 3 10 -29 11 53 -29 1 3 0.19 -126 0 0 -29 10 28 18 38 14.1 15 91 65 -29 13 47 -29 7 10 -29 15 53 -29 5 4 0.19 -125 0 0 -29 14 11 18 38 14.9 16 91 66 -29 17 29 -29 10 53 -29 19 35 -29 8 46 0.19 -124 0 0 -29 17 36 18 38 15.7 17 90 67 -29 20 54 -29 14 18 -29 23 0 -29 12 12 0.19 -123 0 0 -29 20 43 18 38 16.5 17 90 68 -29 24 1 -29 17 25 -29 26 8 -29 15 19 0.19 -122 0 0 -29 23 33 18 38 17.4 18 89 69 -29 26 51 -29 20 15 -29 28 57 -29 18 9 0.19 -121 0 0 -29 26 5 18 38 18.3 19 89 70 -29 29 23 -29 22 48 -29 31 30 -29 20 41 0.19 -120 0 0 -29 28 20 18 38 19.3 20 88 70 -29 31 38 -29 25 2 -29 33 44 -29 22 56 0.19 -119 0 0 -29 30 17 18 38 20.3 21 88 71 -29 33 35 -29 26 59 -29 35 41 -29 24 53 0.19 -118 0 0 -29 31 56 18 38 21.3 22 87 72 -29 35 14 -29 28 38 -29 37 20 -29 26 32 0.19 -117 0 0 -29 33 18 18 38 22.4 23 87 73 -29 36 35 -29 30 0 -29 38 41 -29 27 54 0.19 -116 0 0 -29 34 21 18 38 23.6 24 86 74 -29 37 39 -29 31 4 -29 39 45 -29 28 58 0.19 -115 0 0 -29 35 7 18 38 24.7 24 86 75 -29 38 25 -29 31 50 -29 40 31 -29 29 44 0.19 -114 0 0 -29 35 36 18 38 25.9 25 85 75 -29 38 54 -29 32 18 -29 41 0 -29 30 12 0.19 -113 0 0 -29 35 46 18 38 27.2 26 84 76 -29 39 4 -29 32 29 -29 41 10 -29 30 23 0.19 -112 0 0 -29 35 39 18 38 28.5 27 84 77 -29 38 57 -29 32 22 -29 41 3 -29 30 16 0.19 -111 0 0 -29 35 14 18 38 29.8 28 83 78 -29 38 32 -29 31 57 -29 40 38 -29 29 51 0.19 -110 0 0 -29 34 32 18 38 31.1 29 83 78 -29 37 49 -29 31 14 -29 39 55 -29 29 8 0.19 -109 0 0 -29 33 31 18 38 32.5 30 82 79 -29 36 49 -29 30 13 -29 38 55 -29 28 7 0.19 -108 0 0 -29 32 13 18 38 34.0 31 82 80 -29 35 31 -29 28 55 -29 37 37 -29 26 49 0.19 -107 0 0 -29 30 37 18 38 35.5 31 81 81 -29 33 54 -29 27 19 -29 36 1 -29 25 13 0.19 -106 0 0 -29 28 43 18 38 37.0 32 81 81 -29 32 1 -29 25 25 -29 34 7 -29 23 19 0.19 -105 0 0 -29 26 31 18 38 38.5 33 80 82 -29 29 49 -29 23 13 -29 31 55 -29 21 7 0.19 -104 0 0 -29 24 2 18 38 40.1 34 80 82 -29 27 20 -29 20 44 -29 29 26 -29 18 38 0.19 -103 0 0 -29 21 14 18 38 41.8 35 79 83 -29 24 32 -29 17 57 -29 26 39 -29 15 50 0.19 -102 0 0 -29 18 9 18 38 43.4 36 78 83 -29 21 27 -29 14 51 -29 23 34 -29 12 45 0.19 -101 0 0 -29 14 47 18 38 45.1 37 78 84 -29 18 5 -29 11 29 -29 20 11 -29 9 22 0.19 -100 0 0 -29 11 6 18 38 46.9 38 77 84 -29 14 24 -29 7 48 -29 16 31 -29 5 42 0.19 - 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3 5 39 - 2 58 45 - 3 7 51 - 2 56 33 0.20 4 0 0 - 2 44 13 18 43 32.6 36 262 -12 - 2 47 40 - 2 40 47 - 2 49 52 - 2 38 35 0.20 5 0 0 - 2 26 26 18 43 34.6 35 262 -13 - 2 29 53 - 2 23 0 - 2 32 4 - 2 20 48 0.21 6 0 0 - 2 8 50 18 43 36.6 34 262 -14 - 2 12 16 - 2 5 24 - 2 14 28 - 2 3 12 0.21 7 0 0 - 1 51 26 18 43 38.4 33 261 -15 - 1 54 52 - 1 48 0 - 1 57 3 - 1 45 48 0.21 8 0 0 - 1 34 14 18 43 40.3 32 261 -16 - 1 37 39 - 1 30 48 - 1 39 51 - 1 28 36 0.21 9 0 0 - 1 17 14 18 43 42.1 31 261 -17 - 1 20 39 - 1 13 48 - 1 22 51 - 1 11 37 0.21 10 0 0 - 1 0 26 18 43 43.8 30 261 -19 - 1 3 52 - 0 57 1 - 1 6 3 - 0 54 50 0.21 11 0 0 - 0 43 52 18 43 45.5 29 261 -20 - 0 47 18 - 0 40 27 - 0 49 29 - 0 38 16 0.21 12 0 0 - 0 27 31 18 43 47.1 28 261 -21 - 0 30 56 - 0 24 6 - 0 33 7 - 0 21 55 0.21 13 0 0 - 0 11 24 18 43 48.7 27 261 -22 - 0 14 49 - 0 7 59 - 0 17 0 - 0 5 48 0.21 14 0 0 0 4 29 18 43 50.2 26 261 -23 0 1 5 0 7 54 - 0 1 6 0 10 5 0.21 15 0 0 0 20 8 18 43 51.6 25 261 -24 0 16 44 0 23 33 0 14 33 0 25 43 0.21 16 0 0 0 35 33 18 43 53.0 24 261 -25 0 32 9 0 38 57 0 29 58 0 41 8 0.21 17 0 0 0 50 43 18 43 54.4 23 261 -26 0 47 19 0 54 7 0 45 8 0 56 17 0.21 18 0 0 1 5 38 18 43 55.6 22 261 -27 1 2 14 1 9 2 1 0 3 1 11 12 0.21 19 0 0 1 20 17 18 43 56.9 21 261 -28 1 16 53 1 23 41 1 14 43 1 25 51 0.21 20 0 0 1 34 41 18 43 58.0 20 261 -29 1 31 17 1 38 5 1 29 8 1 40 14 0.21 21 0 0 1 48 49 18 43 59.1 19 261 -30 1 45 26 1 52 13 1 43 16 1 54 22 0.21 22 0 0 2 2 42 18 44 0.2 18 261 -31 1 59 18 2 6 5 1 57 9 2 8 14 0.21 23 0 0 2 16 18 18 44 1.2 17 261 -32 2 12 55 2 19 41 2 10 45 2 21 50 0.21 24 0 0 2 29 37 18 44 2.1 15 261 -33 2 26 14 2 33 0 2 24 5 2 35 9 0.21 25 0 0 2 42 40 18 44 3.0 14 261 -34 2 39 18 2 46 3 2 37 8 2 48 12 0.21 26 0 0 2 55 26 18 44 3.8 13 261 -35 2 52 4 2 58 49 2 49 55 3 0 58 0.21 27 0 0 3 7 55 18 44 4.5 12 261 -36 3 4 33 3 11 18 3 2 24 3 13 27 0.21 28 0 0 3 20 7 18 44 5.2 11 261 -37 3 16 45 3 23 29 3 14 36 3 25 38 0.21 29 0 0 3 32 2 18 44 5.8 10 261 -38 3 28 40 3 35 24 3 26 31 3 37 32 0.22 30 0 0 3 43 39 18 44 6.4 9 261 -39 3 40 17 3 47 1 3 38 9 3 49 9 0.22 31 0 0 3 54 58 18 44 6.9 8 261 -40 3 51 37 3 58 20 3 49 28 4 0 28 0.22 32 0 0 4 6 0 18 44 7.4 7 261 -41 4 2 38 4 9 21 4 0 30 4 11 29 0.22 33 0 0 4 16 43 18 44 7.8 6 261 -42 4 13 22 4 20 4 4 11 14 4 22 12 0.23 34 0 0 4 27 9 18 44 8.1 5 261 -43 4 23 48 4 30 29 4 21 39 4 32 38 0.23 35 0 0 4 37 16 18 44 8.4 4 261 -43 4 33 55 4 40 36 4 31 47 4 42 44 0.24 36 0 0 4 47 4 18 44 8.6 3 262 -44 4 43 44 4 50 25 4 41 36 4 52 33 0.25 37 0 0 4 56 35 18 44 8.7 2 262 -45 4 53 14 4 59 55 4 51 6 5 2 3 0.27 38 0 0 5 5 46 18 44 8.8 1 262 -46 5 2 26 5 9 6 5 0 18 5 11 14 0.32 39 0 0 5 14 39 18 44 8.9 0 262 -47 5 11 19 5 17 59 5 9 11 5 20 7 0.83 Uncertainty in time = +/- 0 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: TYC 5788-00461-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 45 50.6122 DE: -08 15 45.756 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 45 50.6118 DE: -08 15 45.759 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.600,0.700) * V mag [mag]: 9.9 * B mag [mag]: 10.3 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1888) Zu asteroid class: approx. diameter [km]: 12 approx. diameter ["]: 0.005 distance from Earth [AU]: 3.33720 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 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): 0.007", 0.001", 71.633° remarks: * orbital elements for (1888)Zu : Mean anomaly = 237.5321377183 deg Arg. of pericenter = 233.8899567287 deg Long. of node = 244.7243450799 deg Inclination = 5.8528678385 deg Eccentricity = 0.1695918003 Semimajor axis = 2.5452460359 AU Perihelion dist = 2.1135931786 AU Mag: H = 11.83, G = 0.15 Epoch of elements : MJD 60670.77857117 TDT (2024 Dec 26.7786) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,0.34,2024,12,26,18.685712,0.056016,-0.184774,18.759096,5.531882,0.004274,0.001859,-0.000001,0.000000 -49.2501,-8.1488,-100.05,-23.32,False TYC 5788-00461-1,21.76405899,-8.2627098,10.27,9.93,9.75,0.1,0,,21.78590444,-8.1487648,7.63,7.36,0,0,0 1888,Zu,17.56,11.936,3.3372,0,0,3.330,14.58,,1.0,0 0,237.3432,2024,12,26,233.8900,244.7243,5.8529,0.16959,2.54525,2.11359,11.83,5.0,0.15 1.319,0.0070,0.0015,72,0.0016,Known errors,2.44,0,-1,-1 20241226_0461-1,60140.76 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org