IOTA/IOTA-ES occultation update for (145) Adeona / TYC 7439-00195-1 event on 2024 Jul 05, 13:43 UT Visible from Summary ------- On 2024 Jul 05 UT, the 138.053 km diameter asteroid (145) Adeona will occult a 10.9 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 1.90 mag to 12.63 mag (the magnitude of the asteroid) for at most 10.010 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 Jul 05, 13:36 - 2024 Jul 05, 13:51 * geocentric midpoint of event [JD]: 2460497.07216104 * magnitude of target star: 10.94 * magnitude drop [mag]: 1.90 * estimated maximum duration [s]: 10.010 * Moon: 0 % sunlit, 163° distance * Sun: 165° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 139 * 1 sigma uncertainty interval [path widths]: +/- 0.08 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.006", 93°) * approx speed of asteroid's shadow [km/s]: 13.7960 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7439-00195-1 by 145 Adeona on 2024 Jul 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 59 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -27 55 17 .. .. .. -28 2 57 .... 60 0 0 -27 47 29 13 51 34.5 1 125 -8 -27 1 25 -28 33 37 -26 53 48 -28 41 15 .... 61 0 0 -28 25 17 13 51 34.3 2 125 -9 -27 39 26 -29 11 11 -27 31 51 -29 18 47 0.14 62 0 0 -29 2 19 13 51 33.9 3 125 -10 -28 16 41 -29 48 0 -28 9 9 -29 55 33 0.12 63 0 0 -29 38 35 13 51 33.3 4 124 -11 -28 53 11 -30 24 2 -28 45 40 -30 31 34 0.11 64 0 0 -30 14 5 13 51 32.6 5 124 -12 -29 28 55 -30 59 19 -29 21 27 -31 6 48 0.10 65 0 0 -30 48 50 13 51 31.8 6 123 -13 -30 3 53 -31 33 50 -29 56 27 -31 41 17 0.10 66 0 0 -31 22 49 13 51 30.8 7 123 -14 -30 38 5 -32 7 36 -30 30 41 -32 15 1 0.09 67 0 0 -31 56 2 13 51 29.7 8 122 -15 -31 11 32 -32 40 36 -31 4 10 -32 47 58 0.09 68 0 0 -32 28 30 13 51 28.4 9 121 -16 -31 44 13 -33 12 50 -31 36 54 -33 20 11 0.09 69 0 0 -33 0 13 13 51 27.1 10 121 -17 -32 16 10 -33 44 20 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Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 7439-00195-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 55 49.3377 DE: -31 31 27.475 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 55 49.3378 DE: -31 31 27.476 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.9 * B mag [mag]: 11.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (145) Adeona asteroid class: approx. diameter [km]: 138 approx. diameter ["]: 0.092 distance from Earth [AU]: 2.06300 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#118 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): 0.012", 0.006", 93.196° remarks: * orbital elements for (145)Adeona : Mean anomaly = 165.7057306790 deg Arg. of pericenter = 45.2030395878 deg Long. of node = 77.3243680636 deg Inclination = 12.6216873411 deg Eccentricity = 0.1470849579 Semimajor axis = 2.6717983155 AU Perihelion dist = 2.2788169727 AU Mag: H = 8.21, G = 0.15 Epoch of elements : MJD 60496.57216146 TDT (2024 Jul 05.5722) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1182023Apr24,10.01,2024,7,5,13.731865,0.042225,-0.083555,-6.944271,-3.523086,-0.001272,0.000774,0.000001,0.000000 169.3245,-31.4587,-24.79,22.70,False TYC 7439-00195-1,19.93037157,-31.5242987,11.28,10.94,10.76,0.0,0,,19.95658578,-31.4587079,1.90,1.68,0,0,0 145,Adeona,12.63,138.053,2.0630,0,0,-2.313,-15.01,,8.8,0 0,165.5766,2024,7,5,45.2030,77.3244,12.6217,0.14708,2.67180,2.27882,8.21,5.0,0.15 1.083,0.0117,0.0057,93,0.0076,Known errors,1.03,0,-1,-1 20240705_0195-1,60140.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org