IOTA/IOTA-ES occultation update for (69) Hesperia / UCAC4 524-014065 event on 2024 Oct 01, 15:17 UT Visible from Summary ------- On 2024 Oct 01 UT, the 134.734094010115 km diameter asteroid (69) Hesperia will occult a 11.3 mag star in the constellation Orion for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.20 mag to 12.08 mag (the magnitude of the asteroid) for at most 11.350 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 01, 15:09 - 2024 Oct 01, 15:25 * geocentric midpoint of event [JD]: 2460585.13727304 * magnitude of target star: 11.31 * magnitude drop [mag]: 1.20 * estimated maximum duration [s]: 11.350 * Moon: 1 % sunlit, 92° distance * Sun: 104° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 161 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 4.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.036, +/- 0.014) * 1 sigma uncertainty ellipse (major, minor, PA): (0.036", 0.014", 89°) * approx speed of asteroid's shadow [km/s]: 11.8822 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 524-014065 by 69 Hesperia on 2024 Oct 1 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 119 0 0 -10 52 33 15 10 10.1 0 75 -72 -11 37 38 -10 7 51 -11 58 0 - 9 47 54 .... 120 0 0 -10 37 8 15 10 10.3 1 75 -73 -11 22 8 - 9 52 31 -11 42 28 - 9 32 37 0.32 121 0 0 -10 22 14 15 10 10.6 2 75 -74 -11 7 9 - 9 37 42 -11 27 26 - 9 17 50 0.46 122 0 0 -10 7 50 15 10 11.2 3 74 -74 -10 52 40 - 9 23 23 -11 12 55 - 9 3 33 0.51 123 0 0 - 9 53 57 15 10 12.0 4 74 -75 -10 38 42 - 9 9 34 -10 58 55 - 8 49 46 0.54 124 0 0 - 9 40 34 15 10 12.9 5 74 -76 -10 25 14 - 8 56 16 -10 45 25 - 8 36 30 0.56 125 0 0 - 9 27 42 15 10 14.1 6 74 -76 -10 12 18 - 8 43 29 -10 32 27 - 8 23 45 0.58 126 0 0 - 9 15 22 15 10 15.4 7 74 -77 - 9 59 54 - 8 31 13 -10 20 0 - 8 11 30 0.58 127 0 0 - 9 3 33 15 10 17.0 8 74 -77 - 9 48 0 - 8 19 28 -10 8 5 - 7 59 47 0.59 128 0 0 - 8 52 16 15 10 18.8 9 73 -77 - 9 36 39 - 8 8 14 - 9 56 42 - 7 48 35 0.60 129 0 0 - 8 41 30 15 10 20.7 10 73 -78 - 9 25 50 - 7 57 32 - 9 45 51 - 7 37 55 0.60 130 0 0 - 8 31 16 15 10 22.8 11 73 -78 - 9 15 33 - 7 47 22 - 9 35 33 - 7 27 46 0.61 131 0 0 - 8 21 35 15 10 25.2 12 73 -78 - 9 5 48 - 7 37 44 - 9 25 46 - 7 18 10 0.61 132 0 0 - 8 12 26 15 10 27.7 13 73 -78 - 8 56 36 - 7 28 38 - 9 16 33 - 7 9 5 0.61 133 0 0 - 8 3 50 15 10 30.4 14 73 -78 - 8 47 57 - 7 20 4 - 9 7 52 - 7 0 33 0.62 134 0 0 - 7 55 46 15 10 33.3 15 72 -78 - 8 39 50 - 7 12 3 - 8 59 45 - 6 52 33 0.62 135 0 0 - 7 48 15 15 10 36.4 16 72 -78 - 8 32 17 - 7 4 35 - 8 52 10 - 6 45 6 0.62 136 0 0 - 7 41 17 15 10 39.7 17 72 -77 - 8 25 17 - 6 57 39 - 8 45 9 - 6 38 11 0.62 137 0 0 - 7 34 52 15 10 43.2 18 72 -77 - 8 18 50 - 6 51 16 - 8 38 41 - 6 31 49 0.62 138 0 0 - 7 29 1 15 10 46.9 19 72 -76 - 8 12 56 - 6 45 27 - 8 32 47 - 6 26 0 0.63 139 0 0 - 7 23 43 15 10 50.7 20 71 -76 - 8 7 36 - 6 40 10 - 8 27 26 - 6 20 44 0.63 140 0 0 - 7 18 58 15 10 54.7 21 71 -75 - 8 2 50 - 6 35 27 - 8 22 39 - 6 16 2 0.63 141 0 0 - 7 14 47 15 10 58.9 22 71 -74 - 7 58 38 - 6 31 17 - 8 18 26 - 6 11 52 0.63 142 0 0 - 7 11 9 15 11 3.3 23 71 -74 - 7 55 0 - 6 27 41 - 8 14 48 - 6 8 17 0.63 143 0 0 - 7 8 6 15 11 7.9 24 70 -73 - 7 51 55 - 6 24 38 - 8 11 43 - 6 5 14 0.63 144 0 0 - 7 5 36 15 11 12.6 25 70 -72 - 7 49 25 - 6 22 9 - 8 9 12 - 6 2 45 0.63 145 0 0 - 7 3 41 15 11 17.5 26 70 -71 - 7 47 29 - 6 20 14 - 8 7 16 - 6 0 50 0.64 146 0 0 - 7 2 19 15 11 22.6 27 70 -70 - 7 46 8 - 6 18 52 - 8 5 55 - 5 59 29 0.64 147 0 0 - 7 1 32 15 11 27.9 28 69 -70 - 7 45 20 - 6 18 5 - 8 5 7 - 5 58 41 0.64 148 0 0 - 7 1 19 15 11 33.3 29 69 -69 - 7 45 8 - 6 17 51 - 8 4 55 - 5 58 28 0.64 149 0 0 - 7 1 40 15 11 38.9 30 69 -68 - 7 45 30 - 6 18 12 - 8 5 17 - 5 58 48 0.64 150 0 0 - 7 2 36 15 11 44.7 31 68 -67 - 7 46 26 - 6 19 7 - 8 6 14 - 5 59 42 0.64 151 0 0 - 7 4 6 15 11 50.6 32 68 -66 - 7 47 57 - 6 20 36 - 8 7 45 - 6 1 11 0.64 152 0 0 - 7 6 10 15 11 56.7 33 67 -65 - 7 50 3 - 6 22 39 - 8 9 52 - 6 3 14 0.64 153 0 0 - 7 8 49 15 12 2.9 34 67 -64 - 7 52 44 - 6 25 17 - 8 12 33 - 6 5 51 0.64 154 0 0 - 7 12 3 15 12 9.3 35 67 -63 - 7 55 59 - 6 28 29 - 8 15 50 - 6 9 3 0.64 155 0 0 - 7 15 52 15 12 15.9 36 66 -62 - 7 59 49 - 6 32 16 - 8 19 41 - 6 12 48 0.64 156 0 0 - 7 20 15 15 12 22.6 36 66 -61 - 8 4 15 - 6 36 36 - 8 24 7 - 6 17 8 0.64 157 0 0 - 7 25 12 15 12 29.5 37 65 -60 - 8 9 15 - 6 41 32 - 8 29 8 - 6 22 3 0.65 158 0 0 - 7 30 45 15 12 36.5 38 65 -59 - 8 14 50 - 6 47 2 - 8 34 45 - 6 27 31 0.65 159 0 0 - 7 36 52 15 12 43.6 39 64 -58 - 8 21 0 - 6 53 6 - 8 40 57 - 6 33 35 0.65 160 0 0 - 7 43 35 15 12 50.9 40 63 -57 - 8 27 46 - 6 59 46 - 8 47 43 - 6 40 12 0.65 161 0 0 - 7 50 51 15 12 58.4 41 63 -56 - 8 35 6 - 7 6 59 - 8 55 5 - 6 47 24 0.65 162 0 0 - 7 58 43 15 13 6.0 42 62 -55 - 8 43 1 - 7 14 47 - 9 3 2 - 6 55 11 0.65 163 0 0 - 8 7 9 15 13 13.7 43 62 -54 - 8 51 31 - 7 23 10 - 9 11 34 - 7 3 32 0.65 164 0 0 - 8 16 10 15 13 21.6 43 61 -53 - 9 0 36 - 7 32 7 - 9 20 40 - 7 12 27 0.65 165 0 0 - 8 25 46 15 13 29.6 44 60 -52 - 9 10 16 - 7 41 38 - 9 30 22 - 7 21 57 0.65 166 0 0 - 8 35 56 15 13 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Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 524-014065 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 35 16.8292 DE: +14 37 51.475 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 35 16.8293 DE: +14 37 51.475 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.3 * B mag [mag]: 12.1 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (69) Hesperia asteroid class: approx. diameter [km]: 135 approx. diameter ["]: 0.085 distance from Earth [AU]: 2.17720 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#141 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): 0.036", 0.014", 88.792° remarks: * orbital elements for (69)Hesperia : Mean anomaly = 323.0426538088 deg Arg. of pericenter = 288.2430687978 deg Long. of node = 184.9568790227 deg Inclination = 8.5855403392 deg Eccentricity = 0.1698433324 Semimajor axis = 2.9797291146 AU Perihelion dist = 2.4736419920 AU Mag: H = 7.25, G = 0.19 Epoch of elements : MJD 60584.63727380 TDT (2024 Oct 01.6373) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1412023Apr24,11.35,2024,10,1,15.294553,-0.201124,-0.505457,6.231282,-2.480010,-0.005525,-0.000010,0.000000,0.000000 -156.0920,14.6489,-52.05,-3.54,False UCAC4 524-014065,5.58800809,14.6309654,12.05,11.31,10.91,0.1,0,,5.61158880,14.6489171,1.21,1.17,0,0,0 69,Hesperia,12.08,134.892,2.1772,0,0,1.734,-10.02,,8.4,0 0,322.9205,2024,10,1,288.2431,184.9569,8.5855,0.16984,2.97973,2.47364,7.25,5.0,0.15 1.224,0.0357,0.0143,89,0.0192,Known errors,1.48,0,-1,-1 20241001_014065,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org