IOTA/IOTA-ES occultation update for (528) Rezia / UCAC4 295-129473 event on 2024 Oct 23, 01:55 UT Visible from Summary ------- On 2024 Oct 23 UT, the 87.4811408363074 km diameter asteroid (528) Rezia will occult a 11.7 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.81 mag to 15.49 mag (the magnitude of the asteroid) for at most 2.590 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 Oct 23, 01:52 - 2024 Oct 23, 01:58 * geocentric midpoint of event [JD]: 2460606.58000929 * magnitude of target star: 11.71 * magnitude drop [mag]: 3.81 * estimated maximum duration [s]: 2.590 * Moon: 62 % sunlit, 156° distance * Sun: 53° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 94 * 1 sigma uncertainty interval [path widths]: +/- 0.13 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.001", 105°) * approx speed of asteroid's shadow [km/s]: 33.9415 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 295-129473 by 528 Rezia on 2024 Oct 23 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 102 0 0 -15 36 47 1 52 17.5 1 122 45 -16 7 10 -15 6 31 -16 15 19 -14 58 27 .... 103 0 0 -16 13 58 1 52 17.6 2 122 46 -16 44 25 -15 43 39 -16 52 34 -15 35 33 0.37 104 0 0 -16 51 16 1 52 17.7 3 122 47 -17 21 46 -16 20 54 -17 29 57 -16 12 48 0.38 105 0 0 -17 28 41 1 52 18.0 4 121 48 -17 59 14 -16 58 15 -18 7 25 -16 50 8 0.38 106 0 0 -18 6 10 1 52 18.3 5 121 49 -18 36 46 -17 35 42 -18 44 58 -17 27 34 0.38 107 0 0 -18 43 43 1 52 18.7 6 121 50 -19 14 21 -18 13 12 -19 22 34 -18 5 3 0.39 108 0 0 -19 21 18 1 52 19.2 7 120 51 -19 51 59 -18 50 44 -20 0 12 -18 42 35 0.39 109 0 0 -19 58 54 1 52 19.7 9 120 52 -20 29 37 -19 28 18 -20 37 51 -19 20 8 0.39 110 0 0 -20 36 29 1 52 20.4 10 120 52 -21 7 14 -20 5 52 -21 15 29 -19 57 41 0.39 111 0 0 -21 14 3 1 52 21.1 11 119 53 -21 44 50 -20 43 24 -21 53 5 -20 35 13 0.39 112 0 0 -21 51 34 1 52 21.9 12 119 54 -22 22 22 -21 20 53 -22 30 38 -21 12 42 0.39 113 0 0 -22 29 0 1 52 22.7 13 119 55 -22 59 50 -21 58 19 -23 8 6 -21 50 7 0.39 114 0 0 -23 6 21 1 52 23.6 14 118 56 -23 37 11 -22 35 38 -23 45 28 -22 27 27 0.39 115 0 0 -23 43 35 1 52 24.6 15 118 56 -24 14 26 -23 12 52 -24 22 42 -23 4 40 0.39 116 0 0 -24 20 41 1 52 25.7 16 117 57 -24 51 32 -23 49 57 -24 59 49 -23 41 46 0.39 117 0 0 -24 57 38 1 52 26.8 17 117 58 -25 28 29 -24 26 54 -25 36 46 -24 18 42 0.39 118 0 0 -25 34 24 1 52 28.0 19 116 58 -26 5 15 -25 3 40 -26 13 31 -24 55 28 0.39 119 0 0 -26 10 58 1 52 29.3 20 116 59 -26 41 49 -25 40 14 -26 50 5 -25 32 3 0.39 120 0 0 -26 47 19 1 52 30.6 21 115 60 -27 18 9 -26 16 36 -27 26 25 -26 8 25 0.39 121 0 0 -27 23 26 1 52 32.0 22 115 60 -27 54 15 -26 52 44 -28 2 31 -26 44 33 0.39 122 0 0 -27 59 18 1 52 33.4 23 114 61 -28 30 6 -27 28 37 -28 38 21 -27 20 26 0.39 123 0 0 -28 34 53 1 52 34.9 24 114 61 -29 5 40 -28 4 14 -29 13 55 -27 56 4 0.39 124 0 0 -29 10 12 1 52 36.4 25 113 62 -29 40 56 -28 39 34 -29 49 11 -28 31 24 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38.3 31 253 -19 -38 23 26 -37 24 4 -38 31 25 -37 16 10 0.40 - 87 0 0 -37 25 2 1 57 40.0 30 252 -20 -37 54 51 -36 55 19 -38 2 51 -36 47 23 0.40 - 86 0 0 -36 55 53 1 57 41.6 30 251 -21 -37 25 47 -36 26 6 -37 33 49 -36 18 9 0.40 - 85 0 0 -36 26 17 1 57 43.3 29 251 -22 -36 56 16 -35 56 25 -37 4 18 -35 48 27 0.40 - 84 0 0 -35 56 13 1 57 44.9 28 250 -23 -36 26 16 -35 26 16 -36 34 20 -35 18 17 0.40 - 83 0 0 -35 25 42 1 57 46.4 27 249 -24 -35 55 50 -34 55 41 -36 3 55 -34 47 41 0.40 - 82 0 0 -34 54 44 1 57 47.9 26 249 -25 -35 24 57 -34 24 39 -35 33 2 -34 16 38 0.40 - 81 0 0 -34 23 21 1 57 49.4 25 248 -26 -34 53 37 -33 53 12 -35 1 44 -33 45 9 0.40 - 80 0 0 -33 51 32 1 57 50.8 24 247 -27 -34 21 52 -33 21 19 -34 30 0 -33 13 15 0.40 - 79 0 0 -33 19 18 1 57 52.2 23 247 -28 -33 49 41 -32 49 1 -33 57 50 -32 40 57 0.40 - 78 0 0 -32 46 39 1 57 53.6 22 246 -29 -33 17 6 -32 16 19 -33 25 16 -32 8 14 0.41 - 77 0 0 -32 13 37 1 57 54.9 21 246 -30 -32 44 7 -31 43 14 -32 52 18 -31 35 8 0.41 - 76 0 0 -31 40 12 1 57 56.1 20 245 -31 -32 10 46 -31 9 46 -32 18 57 -31 1 39 0.41 - 75 0 0 -31 6 25 1 57 57.3 19 244 -32 -31 37 1 -30 35 57 -31 45 14 -30 27 49 0.41 - 74 0 0 -30 32 17 1 57 58.5 18 244 -33 -31 2 56 -30 1 46 -31 11 9 -29 53 38 0.41 - 73 0 0 -29 57 49 1 57 59.6 17 243 -34 -30 28 30 -29 27 15 -30 36 43 -29 19 6 0.41 - 72 0 0 -29 23 1 1 58 0.6 16 243 -35 -29 53 44 -28 52 25 -30 1 58 -28 44 16 0.41 - 71 0 0 -28 47 54 1 58 1.6 15 242 -36 -29 18 39 -28 17 17 -29 26 53 -28 9 7 0.42 - 70 0 0 -28 12 30 1 58 2.5 14 242 -37 -28 43 16 -27 41 51 -28 51 31 -27 33 41 0.42 - 69 0 0 -27 36 49 1 58 3.4 13 241 -38 -28 7 37 -27 6 9 -28 15 52 -26 57 58 0.42 - 68 0 0 -27 0 53 1 58 4.2 12 241 -39 -27 31 42 -26 30 12 -27 39 57 -26 22 1 0.42 - 67 0 0 -26 24 43 1 58 4.9 10 240 -40 -26 55 32 -25 54 1 -27 3 48 -25 45 49 0.43 - 66 0 0 -25 48 19 1 58 5.6 9 240 -41 -26 19 9 -25 17 37 -26 27 25 -25 9 25 0.43 - 65 0 0 -25 11 43 1 58 6.2 8 239 -42 -25 42 33 -24 41 1 -25 50 49 -24 32 49 0.44 - 64 0 0 -24 34 56 1 58 6.7 7 239 -43 -25 5 46 -24 4 14 -25 14 2 -23 56 2 0.45 - 63 0 0 -23 58 0 1 58 7.2 6 239 -44 -24 28 49 -23 27 18 -24 37 5 -23 19 6 0.46 - 62 0 0 -23 20 55 1 58 7.5 5 238 -45 -23 51 44 -22 50 13 -24 0 0 -22 42 2 0.47 - 61 0 0 -22 43 42 1 58 7.8 4 238 -46 -23 14 31 -22 13 2 -23 22 46 -22 4 50 0.50 - 60 0 0 -22 6 24 1 58 8.1 3 237 -48 -22 37 11 -21 35 44 -22 45 26 -21 27 33 0.54 - 59 0 0 -21 29 1 1 58 8.2 2 237 -49 -21 59 47 -20 58 22 -22 8 2 -20 50 12 0.64 - 58 0 0 -20 51 34 1 58 8.3 1 237 -50 -21 22 18 -20 20 57 -21 30 33 -20 12 47 1.13 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 295-129473 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 22 24.4206 DE: -31 08 45.548 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 22 24.4206 DE: -31 08 45.548 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.7 * B mag [mag]: 12.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (528) Rezia asteroid class: approx. diameter [km]: 87 approx. diameter ["]: 0.030 distance from Earth [AU]: 3.95520 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#69 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): 0.019", 0.001", 105.119° remarks: * orbital elements for (528)Rezia : Mean anomaly = 235.3707598593 deg Arg. of pericenter = 353.1279239888 deg Long. of node = 49.5057696530 deg Inclination = 12.7048548525 deg Eccentricity = 0.0220649242 Semimajor axis = 3.3976566815 AU Perihelion dist = 3.3226876444 AU Mag: H = 9.05, G = 0.15 Epoch of elements : MJD 60606.08000929 TDT (2024 Oct 23.0800) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#692023Apr24,2.59,2024,10,23,1.920223,-0.020033,-0.356961,19.129281,-1.040110,0.004657,-0.000800,-0.000001,0.000000 -159.7890,-31.1709,147.28,-11.53,False UCAC4 295-129473,17.37345021,-31.1459856,12.84,11.71,11.10,0.1,0,,17.39978353,-31.1709451,3.81,3.97,0,0,0 528,Rezia,15.49,87.768,3.9552,0,0,3.315,-2.31,,4.2,0 0,235.2008,2024,10,22,353.1279,49.5058,12.7049,0.02206,3.39766,3.32269,9.05,5.0,0.15 1.134,0.0193,0.0008,105,0.0041,Known errors,0.83,0,-1,-1 20241023_129473,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:41 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org