IOTA/IOTA-ES occultation update for (734) Benda / UCAC4 556-005091 event on 2024 Oct 25, 06:22 UT Visible from Summary ------- On 2024 Oct 25 UT, the 72.853 km diameter asteroid (734) Benda will occult a 11.7 mag star in the constellation Aries for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.51 mag to 14.06 mag (the magnitude of the asteroid) for at most 6.500 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: 97 * date and approx. time of event: 2024 Oct 25, 06:13 - 2024 Oct 25, 06:32 * geocentric midpoint of event [JD]: 2460608.76575671 * magnitude of target star: 11.66 * magnitude drop [mag]: 2.51 * estimated maximum duration [s]: 6.500 * Moon: 41 % sunlit, 88° distance * Sun: 167° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 76 * 1 sigma uncertainty interval [path widths]: +/- 0.39 * 1 sigma uncertainty interval [seconds]: +/- 4.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.038, +/- 0.023) * 1 sigma uncertainty ellipse (major, minor, PA): (0.040", 0.019", 68°) * approx speed of asteroid's shadow [km/s]: 11.2004 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 556-005091 by 734 Benda on 2024 Oct 25 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 -172 0 0 -21 55 2 6 31 48.6 1 67 -13 -21 32 38 -22 17 29 -21 15 6 -22 35 6 .... -171 0 0 -21 31 5 6 31 48.4 2 66 -14 -21 8 41 -21 53 33 -20 51 9 -22 11 11 0.12 -170 0 0 -21 7 1 6 31 48.0 3 66 -15 -20 44 35 -21 29 29 -20 27 3 -21 47 8 0.19 -169 0 0 -20 42 49 6 31 47.4 4 66 -16 -20 20 23 -21 5 18 -20 2 50 -21 22 57 0.22 -168 0 0 -20 18 30 6 31 46.7 5 65 -17 -19 56 4 -20 40 59 -19 38 30 -20 58 39 0.24 -167 0 0 -19 54 5 6 31 45.7 6 65 -18 -19 31 38 -20 16 34 -19 14 5 -20 34 14 0.25 -166 0 0 -19 29 34 6 31 44.6 7 65 -19 -19 7 6 -19 52 4 -18 49 33 -20 9 43 0.26 -165 0 0 -19 4 57 6 31 43.2 8 64 -20 -18 42 30 -19 27 28 -18 24 56 -19 45 7 0.26 -164 0 0 -18 40 16 6 31 41.7 9 64 -21 -18 17 49 -19 2 47 -18 0 15 -19 20 27 0.27 -163 0 0 -18 15 31 6 31 40.0 10 64 -22 -17 53 4 -18 38 2 -17 35 30 -18 55 42 0.27 -162 0 0 -17 50 43 6 31 38.1 11 63 -24 -17 28 15 -18 13 13 -17 10 41 -18 30 53 0.27 -161 0 0 -17 25 52 6 31 36.0 12 63 -25 -17 3 24 -17 48 22 -16 45 50 -18 6 2 0.28 -160 0 0 -17 0 58 6 31 33.8 13 63 -26 -16 38 31 -17 23 28 -16 20 57 -17 41 8 0.28 -159 0 0 -16 36 3 6 31 31.3 14 62 -27 -16 13 36 -16 58 33 -15 56 3 -17 16 13 0.28 -158 0 0 -16 11 7 6 31 28.6 15 62 -28 -15 48 40 -16 33 36 -15 31 7 -16 51 16 0.28 -157 0 0 -15 46 11 6 31 25.8 16 62 -29 -15 23 44 -16 8 40 -15 6 11 -16 26 19 0.28 -156 0 0 -15 21 14 6 31 22.7 17 62 -30 -14 58 49 -15 43 43 -14 41 16 -16 1 22 0.28 -155 0 0 -14 56 19 6 31 19.5 18 61 -31 -14 33 54 -15 18 47 -14 16 22 -15 36 25 0.29 -154 0 0 -14 31 25 6 31 16.1 19 61 -32 -14 9 1 -14 53 52 -13 51 29 -15 11 30 0.29 -153 0 0 -14 6 33 6 31 12.5 20 61 -33 -13 44 9 -14 29 0 -13 26 39 -14 46 37 0.29 -152 0 0 -13 41 44 6 31 8.7 21 60 -34 -13 19 21 -14 4 10 -13 1 51 -14 21 46 0.29 -151 0 0 -13 16 58 6 31 4.7 22 60 -35 -12 54 36 -13 39 23 -12 37 6 -13 56 59 0.29 -150 0 0 -12 52 16 6 31 0.6 23 60 -36 -12 29 55 -13 14 40 -12 12 26 -13 32 15 0.29 -149 0 0 -12 27 38 6 30 56.2 24 60 -37 -12 5 18 -12 50 1 -11 47 50 -13 7 36 0.29 -148 0 0 -12 3 6 6 30 51.7 25 59 -38 -11 40 47 -12 25 28 -11 23 19 -12 43 1 0.29 -147 0 0 -11 38 39 6 30 47.1 26 59 -39 -11 16 21 -12 1 0 -10 58 54 -12 18 32 0.29 -146 0 0 -11 14 18 6 30 42.2 27 59 -40 -10 52 1 -11 36 38 -10 34 36 -11 54 9 0.29 -145 0 0 -10 50 4 6 30 37.2 28 59 -41 -10 27 48 -11 12 22 -10 10 24 -11 29 53 0.29 -144 0 0 -10 25 57 6 30 32.0 29 58 -42 -10 3 43 -10 48 14 - 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Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 556-005091 * constellation : Aries * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 02 40 10.0538 DE: +21 09 16.261 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 02 40 10.0538 DE: +21 09 16.261 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.7 * B mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (734) Benda asteroid class: approx. diameter [km]: 73 approx. diameter ["]: 0.053 distance from Earth [AU]: 1.88240 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.040", 0.019", 67.981° remarks: * orbital elements for (734)Benda : Mean anomaly = 336.5639612013 deg Arg. of pericenter = 65.6613058424 deg Long. of node = 3.1194287441 deg Inclination = 5.8039910601 deg Eccentricity = 0.1016787032 Semimajor axis = 3.1469122492 AU Perihelion dist = 2.8269382924 AU Mag: H = 10.02, G = 0.15 Epoch of elements : MJD 60608.26575417 TDT (2024 Oct 25.2658) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,6.50,2024,10,25,6.378161,0.037179,-0.272311,-6.263656,-0.855625,-0.001044,-0.000890,0.000001,0.000000 -89.4105,21.2631,80.34,-12.28,False UCAC4 556-005091,2.66945939,21.1545169,12.25,11.66,11.34,0.0,0,,2.69325020,21.2630761,2.52,2.40,0,0,0 734,Benda,14.06,72.853,1.8824,0,0,-2.093,-4.00,,4.2,0 0,336.5170,2024,10,25,65.6613,3.1194,5.8040,0.10168,3.14691,2.82694,10.01,5.0,0.15 1.392,0.0403,0.0190,68,0.0209,Known errors,0.99,0,-1,-1 20241025_005091,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:47 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org