IOTA/IOTA-ES occultation update for (523) Ada / TYC 5782-00008-1 event on 2024 Nov 29, 22:26 UT Visible from Summary ------- On 2024 Nov 29 UT, the 31.8764777844943 km diameter asteroid (523) Ada will occult a 10.3 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.65 mag to 15.98 mag (the magnitude of the asteroid) for at most 1.170 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: 99 * date and approx. time of event: 2024 Nov 29, 22:22 - 2024 Nov 29, 22:30 * geocentric midpoint of event [JD]: 2460644.43493495 * magnitude of target star: 10.34 * magnitude drop [mag]: 5.65 * estimated maximum duration [s]: 1.170 * Moon: 2 % sunlit, 81° distance * Sun: 65° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 32 * 1 sigma uncertainty interval [path widths]: +/- 0.23 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.003", 68°) * approx speed of asteroid's shadow [km/s]: 27.4075 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5782-00008-1 by 523 Ada on 2024 Nov 29 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 179 0 0 - 7 39 42 22 22 26.8 1 103 64 - 7 48 42 - 7 30 41 - 7 52 52 - 7 26 31 .... -180 0 0 - 7 53 32 22 22 26.9 2 103 65 - 8 2 31 - 7 44 32 - 8 6 41 - 7 40 22 -0.03 -179 0 0 - 8 7 5 22 22 27.1 3 103 66 - 8 16 4 - 7 58 6 - 8 20 14 - 7 53 56 -0.06 -178 0 0 - 8 20 22 22 22 27.3 4 103 67 - 8 29 20 - 8 11 23 - 8 33 30 - 8 7 13 -0.07 -177 0 0 - 8 33 21 22 22 27.6 5 103 68 - 8 42 19 - 8 24 23 - 8 46 28 - 8 20 13 -0.08 -176 0 0 - 8 46 2 22 22 28.0 6 103 69 - 8 55 0 - 8 37 5 - 8 59 9 - 8 32 56 -0.09 -175 0 0 - 8 58 27 22 22 28.4 7 102 70 - 9 7 23 - 8 49 30 - 9 11 32 - 8 45 21 -0.09 -174 0 0 - 9 10 33 22 22 29.0 8 102 70 - 9 19 29 - 9 1 36 - 9 23 38 - 8 57 28 -0.09 -173 0 0 - 9 22 21 22 22 29.6 9 102 71 - 9 31 17 - 9 13 25 - 9 35 25 - 9 9 17 -0.10 -172 0 0 - 9 33 51 22 22 30.2 10 102 72 - 9 42 47 - 9 24 56 - 9 46 55 - 9 20 48 -0.10 -171 0 0 - 9 45 3 22 22 31.0 11 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1 11 28 10 -0.11 - 36 0 0 11 34 59 22 29 39.0 29 248 -36 11 25 43 11 44 15 11 21 25 11 48 33 -0.11 - 35 0 0 11 55 15 22 29 41.1 28 248 -37 11 45 59 12 4 31 11 41 42 12 8 48 -0.11 - 34 0 0 12 15 23 22 29 43.1 27 248 -38 12 6 8 12 24 38 12 1 50 12 28 56 -0.11 - 33 0 0 12 35 22 22 29 45.0 26 248 -39 12 26 7 12 44 38 12 21 50 12 48 55 -0.11 - 32 0 0 12 55 13 22 29 46.8 25 249 -40 12 45 58 13 4 28 12 41 41 13 8 45 -0.11 - 31 0 0 13 14 54 22 29 48.6 24 249 -41 13 5 40 13 24 9 13 1 23 13 28 26 -0.11 - 30 0 0 13 34 26 22 29 50.3 23 249 -42 13 25 12 13 43 40 13 20 56 13 47 57 -0.11 - 29 0 0 13 53 48 22 29 51.9 22 249 -43 13 44 34 14 3 1 13 40 18 14 7 18 -0.11 - 28 0 0 14 12 59 22 29 53.4 21 250 -44 14 3 46 14 22 12 13 59 30 14 26 28 -0.11 - 27 0 0 14 31 59 22 29 54.9 20 250 -45 14 22 47 14 41 12 14 18 31 14 45 28 -0.11 - 26 0 0 14 50 49 22 29 56.3 19 250 -46 14 41 36 15 0 1 14 37 21 15 4 17 -0.11 - 25 0 0 15 9 26 22 29 57.6 18 250 -47 15 0 15 15 18 38 14 55 59 15 22 54 -0.11 - 24 0 0 15 27 52 22 29 58.9 17 251 -48 15 18 41 15 37 4 15 14 26 15 41 19 -0.11 - 23 0 0 15 46 6 22 30 0.1 16 251 -49 15 36 56 15 55 17 15 32 40 15 59 32 -0.11 - 22 0 0 16 4 8 22 30 1.2 15 251 -50 15 54 58 16 13 18 15 50 43 16 17 33 -0.11 - 21 0 0 16 21 56 22 30 2.2 14 251 -51 16 12 47 16 31 6 16 8 32 16 35 21 -0.11 - 20 0 0 16 39 32 22 30 3.2 13 252 -52 16 30 23 16 48 41 16 26 8 16 52 56 -0.11 - 19 0 0 16 56 54 22 30 4.0 12 252 -53 16 47 46 17 6 3 16 43 32 17 10 17 -0.10 - 18 0 0 17 14 3 22 30 4.9 11 252 -54 17 4 55 17 23 11 17 0 41 17 27 25 -0.10 - 17 0 0 17 30 58 22 30 5.6 10 253 -55 17 21 50 17 40 5 17 17 37 17 44 19 -0.10 - 16 0 0 17 47 38 22 30 6.3 9 253 -56 17 38 31 17 56 46 17 34 18 18 0 59 -0.10 - 15 0 0 18 4 5 22 30 6.9 8 253 -57 17 54 58 18 13 11 17 50 45 18 17 25 -0.10 - 14 0 0 18 20 16 22 30 7.4 7 254 -58 18 11 11 18 29 23 18 6 58 18 33 36 -0.10 - 13 0 0 18 36 13 22 30 7.8 6 254 -59 18 27 8 18 45 19 18 22 55 18 49 32 -0.10 - 12 0 0 18 51 55 22 30 8.2 5 254 -60 18 42 50 19 1 0 18 38 38 19 5 13 -0.10 - 11 0 0 19 7 22 22 30 8.5 4 255 -61 18 58 18 19 16 26 18 54 5 19 20 38 -0.10 - 10 0 0 19 22 33 22 30 8.8 3 255 -62 19 13 29 19 31 37 19 9 17 19 35 49 -0.10 - 9 0 0 19 37 28 22 30 9.0 2 255 -63 19 28 25 19 46 31 19 24 14 19 50 43 -0.09 - 8 0 0 19 52 8 22 30 9.1 1 256 -64 19 43 5 20 1 10 19 38 54 20 5 22 -0.08 - 7 0 0 20 6 31 22 30 9.1 0 256 -65 19 57 30 20 15 33 19 53 18 20 19 45 0.11 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 5782-00008-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 58 17.3123 DE: -13 18 22.478 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 58 17.3119 DE: -13 18 22.479 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.3 * B mag [mag]: 10.7 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (523) Ada asteroid class: approx. diameter [km]: 32 approx. diameter ["]: 0.013 distance from Earth [AU]: 3.44040 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): 0.009", 0.003", 68.328° remarks: * orbital elements for (523)Ada : Mean anomaly = 258.1583150537 deg Arg. of pericenter = 189.9625476105 deg Long. of node = 260.5931616377 deg Inclination = 4.3148999729 deg Eccentricity = 0.1800078051 Semimajor axis = 2.9644270967 AU Perihelion dist = 2.4308070816 AU Mag: H = 9.91, G = 0.15 Epoch of elements : MJD 60643.93493492 TDT (2024 Nov 29.9349) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,1.17,2024,11,29,22.438439,-0.025895,0.109771,15.002485,3.772709,0.005220,0.001702,-0.000001,0.000000 -90.9589,-13.2109,-159.42,-21.67,False TYC 5782-00008-1,20.97147566,-13.3062436,10.73,10.34,10.13,0.1,0,,20.99412104,-13.2108575,5.64,5.40,0,0,0 523,Ada,15.98,32.126,3.4404,0,0,2.626,9.65,,2.4,0 0,257.9778,2024,11,29,189.9625,260.5932,4.3149,0.18001,2.96443,2.43081,9.91,5.0,0.15 1.232,0.0093,0.0027,68,0.0030,Known errors,1.22,0,-1,-1 20241129_0008-1,60140.72 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org