IOTA/IOTA-ES occultation update for (514) Armida / UCAC4 343-080397 event on 2024 Oct 05, 11:16 UT Visible from Summary ------- On 2024 Oct 05 UT, the 108.499 km diameter asteroid (514) Armida will occult a 11.6 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 3.69 mag to 15.29 mag (the magnitude of the asteroid) for at most 3.100 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: 100 * date and approx. time of event: 2024 Oct 05, 11:13 - 2024 Oct 05, 11:19 * geocentric midpoint of event [JD]: 2460588.96999287 * magnitude of target star: 11.64 * magnitude drop [mag]: 3.69 * estimated maximum duration [s]: 3.100 * Moon: 7 % sunlit, 22° distance * Sun: 51° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 109 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.001", 97°) * approx speed of asteroid's shadow [km/s]: 35.0290 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 343-080397 by 514 Armida on 2024 Oct 5 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 - 27 0 0 .. .. .... .. .. .. .. .. .. 9 59 16 .. .. .. 9 57 18 .. .. .. .... - 26 0 0 10 7 2 11 13 45.1 1 112 52 9 35 15 10 38 49 9 33 17 10 40 47 .... - 25 0 0 9 42 51 11 13 45.2 2 112 53 9 11 3 10 14 40 9 9 5 10 16 39 0.04 - 24 0 0 9 18 30 11 13 45.4 3 112 54 8 46 40 9 50 21 8 44 42 9 52 19 0.01 - 23 0 0 8 53 59 11 13 45.6 4 113 56 8 22 7 9 25 51 8 20 8 9 27 49 0.00 - 22 0 0 8 29 17 11 13 45.9 5 113 57 7 57 24 9 1 11 7 55 26 9 3 10 -0.01 - 21 0 0 8 4 27 11 13 46.2 6 113 58 7 32 32 8 36 22 7 30 33 8 38 21 -0.01 - 20 0 0 7 39 27 11 13 46.6 7 113 59 7 7 32 8 11 24 7 5 33 8 13 23 -0.02 - 19 0 0 7 14 20 11 13 47.1 8 113 60 6 42 23 7 46 18 6 40 24 7 48 17 -0.02 - 18 0 0 6 49 5 11 13 47.6 10 113 61 6 17 7 7 21 4 6 15 8 7 23 3 -0.02 - 17 0 0 6 23 43 11 13 48.2 11 113 62 5 51 44 6 55 43 5 49 45 6 57 42 -0.03 - 16 0 0 5 58 15 11 13 48.9 12 113 63 5 26 15 6 30 16 5 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-0.03 144 0 0 - 7 51 11 11 19 47.9 6 249 -45 - 8 22 40 - 7 19 40 - 8 24 38 - 7 17 43 -0.02 145 0 0 - 7 28 24 11 19 48.2 5 249 -46 - 7 59 55 - 6 56 51 - 8 1 53 - 6 54 54 -0.02 146 0 0 - 7 5 23 11 19 48.4 4 249 -47 - 7 36 57 - 6 33 48 - 7 38 54 - 6 31 51 -0.01 147 0 0 - 6 42 9 11 19 48.6 3 249 -48 - 7 13 45 - 6 10 32 - 7 15 43 - 6 8 34 0.00 148 0 0 - 6 18 43 11 19 48.8 2 249 -49 - 6 50 21 - 5 47 4 - 6 52 19 - 5 45 6 0.02 149 0 0 - 5 55 4 11 19 48.9 1 248 -50 - 6 26 44 - 5 23 23 - 6 28 42 - 5 21 25 0.11 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 343-080397 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 06 36.4648 DE: -21 28 52.442 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 06 36.4643 DE: -21 28 52.441 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.6 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (514) Armida asteroid class: approx. diameter [km]: 108 approx. diameter ["]: 0.041 distance from Earth [AU]: 3.62920 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#108 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): 0.010", 0.001", 96.842° remarks: * orbital elements for (514)Armida : Mean anomaly = 241.2987423086 deg Arg. of pericenter = 112.1766608947 deg Long. of node = 268.5001663710 deg Inclination = 3.8807034455 deg Eccentricity = 0.0370502642 Semimajor axis = 3.0480911511 AU Perihelion dist = 2.9351585685 AU Mag: H = 9.21, G = 0.15 Epoch of elements : MJD 60588.46999276 TDT (2024 Oct 05.4700) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1082023Apr24,3.10,2024,10,5,11.279829,0.008916,0.044116,19.548006,-2.963194,0.004477,-0.000887,-0.000001,0.000000 58.1894,-21.5479,7.87,-5.02,False UCAC4 343-080397,16.11012916,-21.4812340,12.21,11.64,11.33,0.0,0,,16.13412899,-21.5478690,3.69,3.55,0,0,0 514,Armida,15.29,108.499,3.6292,0,0,3.395,-7.18,,6.0,0 0,241.2117,2024,10,5,112.1767,268.5002,3.8807,0.03705,3.04809,2.93516,9.21,5.0,0.15 1.031,0.0100,0.0012,97,0.0013,Known errors,1.10,0,-1,-1 20241005_080397,60140.61 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org