IOTA/IOTA-ES occultation update for (3468) Urgenta / UCAC4 312-154338 event on 2024 Oct 30, 09:42 UT Visible from Summary ------- On 2024 Oct 30 UT, the 14.7529266485032 km diameter asteroid (3468) Urgenta will occult a 9.2 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.68 mag to 17.85 mag (the magnitude of the asteroid) for at most 0.490 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: 88 * date and approx. time of event: 2024 Oct 30, 09:39 - 2024 Oct 30, 09:45 * geocentric midpoint of event [JD]: 2460613.90436275 * magnitude of target star: 9.17 * magnitude drop [mag]: 8.68 * estimated maximum duration [s]: 0.490 * Moon: 4 % sunlit, 77° distance * Sun: 55° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.56 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.003", 98°) * approx speed of asteroid's shadow [km/s]: 33.4661 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 312-154338 by 3468 Urgenta on 2024 Oct 30 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 - 10 0 0 -17 2 29 9 39 18.4 1 119 50 -17 7 53 -16 57 5 -17 13 56 -16 51 3 .... - 9 0 0 -17 34 38 9 39 18.5 2 118 51 -17 40 2 -17 29 13 -17 46 5 -17 23 11 0.36 - 8 0 0 -18 6 49 9 39 18.6 3 118 52 -18 12 14 -18 1 25 -18 18 18 -17 55 22 0.37 - 7 0 0 -18 39 3 9 39 18.9 4 118 53 -18 44 28 -18 33 38 -18 50 32 -18 27 35 0.37 - 6 0 0 -19 11 18 9 39 19.2 5 118 54 -19 16 43 -19 5 53 -19 22 47 -18 59 49 0.37 - 5 0 0 -19 43 33 9 39 19.6 6 117 55 -19 48 58 -19 38 7 -19 55 3 -19 32 4 0.37 - 4 0 0 -20 15 47 9 39 20.0 7 117 56 -20 21 12 -20 10 21 -20 27 17 -20 4 17 0.37 - 3 0 0 -20 47 59 9 39 20.6 8 116 57 -20 53 25 -20 42 33 -20 59 30 -20 36 29 0.37 - 2 0 0 -21 20 8 9 39 21.2 9 116 58 -21 25 34 -21 14 42 -21 31 39 -21 8 38 0.37 - 1 0 0 -21 52 14 9 39 21.8 11 116 59 -21 57 40 -21 46 48 -22 3 45 -21 40 43 0.37 0 0 0 -22 24 15 9 39 22.6 12 115 59 -22 29 41 -22 18 49 -22 35 46 -22 12 44 0.37 1 0 0 -22 56 10 9 39 23.4 13 115 60 -23 1 36 -22 50 44 -23 7 42 -22 44 39 0.37 2 0 0 -23 27 59 9 39 24.2 14 115 61 -23 33 25 -23 22 32 -23 39 30 -23 16 28 0.37 3 0 0 -23 59 40 9 39 25.2 15 114 62 -24 5 6 -23 54 13 -24 11 11 -23 48 9 0.38 4 0 0 -24 31 12 9 39 26.2 16 114 62 -24 36 38 -24 25 46 -24 42 43 -24 19 42 0.38 5 0 0 -25 2 35 9 39 27.2 17 113 63 -25 8 1 -24 57 9 -25 14 6 -24 51 5 0.38 6 0 0 -25 33 48 9 39 28.3 18 113 64 -25 39 14 -25 28 22 -25 45 19 -25 22 18 0.38 7 0 0 -26 4 50 9 39 29.5 19 112 64 -26 10 16 -25 59 24 -26 16 21 -25 53 21 0.38 8 0 0 -26 35 40 9 39 30.7 20 112 65 -26 41 6 -26 30 15 -26 47 10 -26 24 11 0.38 9 0 0 -27 6 17 9 39 32.0 21 111 66 -27 11 42 -27 0 52 -27 17 47 -26 54 49 0.38 10 0 0 -27 36 41 9 39 33.4 22 111 66 -27 42 6 -27 31 16 -27 48 10 -27 25 13 0.38 11 0 0 -28 6 50 9 39 34.8 23 110 67 -28 12 15 -28 1 25 -28 18 18 -27 55 23 0.38 12 0 0 -28 36 44 9 39 36.2 24 110 67 -28 42 9 -28 31 20 -28 48 12 -28 25 17 0.38 13 0 0 -29 6 23 9 39 37.7 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-50 -19 34 47 -19 23 56 -19 40 51 -19 17 53 1.65 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 312-154338 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 07 29.9853 DE: -27 40 26.687 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 07 29.9853 DE: -27 40 26.687 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 9.2 * B mag [mag]: 10.7 * Diameter [mas]: 0.60 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3468) Urgenta asteroid class: approx. diameter [km]: 15 approx. diameter ["]: 0.006 distance from Earth [AU]: 3.51150 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): 0.014", 0.003", 97.735° remarks: * orbital elements for (3468)Urgenta : Mean anomaly = 268.4165842425 deg Arg. of pericenter = 307.1321686070 deg Long. of node = 80.9697382599 deg Inclination = 10.9989277914 deg Eccentricity = 0.0788770686 Semimajor axis = 3.0214709563 AU Perihelion dist = 2.7831461845 AU Mag: H = 11.86, G = 0.15 Epoch of elements : MJD 60613.40436250 TDT (2024 Oct 30.4044) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,0.49,2024,10,30,9.704706,-0.009912,-0.346529,18.882434,-0.504721,0.004838,-0.000178,-0.000001,0.000000 87.4886,-27.6721,30.34,-14.00,False UCAC4 312-154338,18.12499597,-27.6740797,10.73,9.17,8.33,0.6,0,,18.15072091,-27.6720807,8.68,9.08,0,0,0 3468,Urgenta,17.85,16.281,3.5115,0,0,3.560,-1.26,,1.4,0 0,268.3407,2024,10,30,307.1322,80.9697,10.9989,0.07888,3.02147,2.78315,11.86,5.0,0.15 1.559,0.0137,0.0033,98,0.0036,Known errors,0.59,0,-1,-1 20241030_154338,60140.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org