IOTA/IOTA-ES occultation update for (3313) Mendel / UCAC4 346-093640 event on 2024 Oct 01, 19:04 UT Visible from Summary ------- On 2024 Oct 01 UT, the 9.35701966032022 km diameter asteroid (3313) Mendel will occult a 11.4 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.87 mag to 17.30 mag (the magnitude of the asteroid) for at most 0.350 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: 97 * date and approx. time of event: 2024 Oct 01, 19:00 - 2024 Oct 01, 19:07 * geocentric midpoint of event [JD]: 2460585.29463375 * magnitude of target star: 11.43 * magnitude drop [mag]: 5.87 * estimated maximum duration [s]: 0.350 * Moon: 1 % sunlit, 82° distance * Sun: 71° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 10 * 1 sigma uncertainty interval [path widths]: +/- 0.38 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.002", 83°) * approx speed of asteroid's shadow [km/s]: 29.4028 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 346-093640 by 3313 Mendel 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 -129 0 0 - 6 32 13 19 0 40.3 1 111 69 - 6 35 16 - 6 29 10 - 6 37 33 - 6 26 53 - 6 34 36 - 6 29 50 .... -128 0 0 - 6 55 21 19 0 40.4 2 111 70 - 6 58 24 - 6 52 18 - 7 0 41 - 6 50 1 - 6 57 44 - 6 52 58 0.13 -127 0 0 - 7 18 26 19 0 40.5 3 111 71 - 7 21 28 - 7 15 23 - 7 23 46 - 7 13 6 - 7 20 49 - 7 16 3 0.12 -126 0 0 - 7 41 27 19 0 40.8 4 111 71 - 7 44 29 - 7 38 24 - 7 46 47 - 7 36 7 - 7 43 50 - 7 39 4 0.11 -125 0 0 - 8 4 23 19 0 41.1 5 111 72 - 8 7 26 - 8 1 21 - 8 9 43 - 7 59 4 - 8 6 46 - 8 2 1 0.10 -124 0 0 - 8 27 16 19 0 41.5 6 110 73 - 8 30 18 - 8 24 13 - 8 32 35 - 8 21 56 - 8 29 38 - 8 24 53 0.10 -123 0 0 - 8 50 2 19 0 41.9 7 110 74 - 8 53 5 - 8 47 0 - 8 55 22 - 8 44 43 - 8 52 25 - 8 47 40 0.10 -122 0 0 - 9 12 43 19 0 42.4 8 110 75 - 9 15 46 - 9 9 41 - 9 18 3 - 9 7 24 - 9 15 6 - 9 10 21 0.10 -121 0 0 - 9 35 18 19 0 43.1 9 110 76 - 9 38 20 - 9 32 16 - 9 40 37 - 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7 20 7 - 7 27 50 - 7 23 4 0.10 40 0 0 - 7 2 19 19 7 47.3 13 250 -58 - 7 5 21 - 6 59 16 - 7 7 39 - 6 56 59 - 7 4 42 - 6 59 56 0.10 41 0 0 - 6 39 8 19 7 48.2 12 250 -59 - 6 42 10 - 6 36 5 - 6 44 28 - 6 33 47 - 6 41 31 - 6 36 44 0.10 42 0 0 - 6 15 53 19 7 49.0 11 250 -60 - 6 18 56 - 6 12 51 - 6 21 14 - 6 10 33 - 6 18 17 - 6 13 30 0.10 43 0 0 - 5 52 37 19 7 49.7 10 250 -61 - 5 55 40 - 5 49 34 - 5 57 58 - 5 47 17 - 5 55 0 - 5 50 14 0.11 44 0 0 - 5 29 19 19 7 50.3 8 250 -62 - 5 32 22 - 5 26 17 - 5 34 40 - 5 23 59 - 5 31 43 - 5 26 56 0.11 45 0 0 - 5 6 0 19 7 50.9 7 249 -63 - 5 9 3 - 5 2 58 - 5 11 21 - 5 0 40 - 5 8 24 - 5 3 37 0.11 46 0 0 - 4 42 41 19 7 51.4 6 249 -64 - 4 45 44 - 4 39 38 - 4 48 1 - 4 37 21 - 4 45 4 - 4 40 18 0.11 47 0 0 - 4 19 21 19 7 51.8 5 249 -65 - 4 22 24 - 4 16 19 - 4 24 42 - 4 14 1 - 4 21 44 - 4 16 58 0.12 48 0 0 - 3 56 2 19 7 52.1 4 249 -66 - 3 59 5 - 3 53 0 - 4 1 23 - 3 50 42 - 3 58 26 - 3 53 39 0.13 49 0 0 - 3 32 45 19 7 52.4 3 249 -67 - 3 35 47 - 3 29 42 - 3 38 5 - 3 27 25 - 3 35 8 - 3 30 22 0.14 50 0 0 - 3 9 29 19 7 52.5 2 249 -69 - 3 12 31 - 3 6 26 - 3 14 49 - 3 4 9 - 3 11 52 - 3 7 6 0.17 51 0 0 - 2 46 15 19 7 52.6 1 249 -70 - 2 49 17 - 2 43 12 - 2 51 35 - 2 40 55 - 2 48 38 - 2 43 52 0.27 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 346-093640 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 14 15.7774 DE: -20 56 56.691 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 14 15.7774 DE: -20 56 56.691 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 11.4 * B mag [mag]: 13.6 * Diameter [mas]: 0.60 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3313) Mendel asteroid class: approx. diameter [km]: 9 approx. diameter ["]: 0.005 distance from Earth [AU]: 2.46570 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#48 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): 0.017", 0.002", 82.546° remarks: * orbital elements for (3313)Mendel : Mean anomaly = 19.2490500719 deg Arg. of pericenter = 346.0415435960 deg Long. of node = 272.3037800552 deg Inclination = 11.3967885598 deg Eccentricity = 0.1310494604 Semimajor axis = 2.6550850345 AU Perihelion dist = 2.3071375734 AU Mag: H = 12.38, G = 0.15 Epoch of elements : MJD 60584.79463362 TDT (2024 Oct 01.7946) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#482023Apr24,0.35,2024,10,1,19.071210,0.002401,-0.080835,16.585088,0.594802,0.005242,-0.000336,0.000000,0.000000 -38.1392,-20.9782,-108.72,-3.60,False UCAC4 346-093640,17.23771600,-20.9490809,13.62,11.43,10.25,0.6,4,,17.26210904,-20.9782113,5.87,6.60,0,0,0 3313,Mendel,17.30,10.430,2.4657,0,0,4.223,2.12,,0.8,0 0,19.0680,2024,10,1,346.0415,272.3038,11.3968,0.13105,2.65509,2.30714,12.38,5.0,0.15 1.376,0.0167,0.0016,83,0.0022,Known errors,1.29,0,-1,-1 20241001_093640,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org