IOTA/IOTA-ES occultation update for (4292) Aoba / TYC 6850-00964-1 event on 2024 Jul 08, 22:52 UT Visible from Summary ------- On 2024 Jul 08 UT, the 25.224 km diameter asteroid (4292) Aoba will occult a 11.5 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 5.02 mag to 16.51 mag (the magnitude of the asteroid) for at most 2.260 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 Jul 08, 22:43 - 2024 Jul 08, 23:01 * geocentric midpoint of event [JD]: 2460500.45320646 * magnitude of target star: 11.50 * magnitude drop [mag]: 5.02 * estimated maximum duration [s]: 2.260 * Moon: 9 % sunlit, 129° distance * Sun: 163° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 28 * 1 sigma uncertainty interval [path widths]: +/- 0.28 * 1 sigma uncertainty interval [seconds]: +/- 2.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.004", 86°) * approx speed of asteroid's shadow [km/s]: 11.1490 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6850-00964-1 by 4292 Aoba on 2024 Jul 8 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 -101 0 0 -18 18 34 23 1 10.6 0 119 16 -18 9 56 -18 27 12 -18 5 8 -18 32 2 .... -100 0 0 -18 50 16 23 1 10.5 1 118 15 -18 41 37 -18 58 55 -18 36 48 -19 3 45 0.41 - 99 0 0 -19 22 6 23 1 10.1 2 118 14 -19 13 27 -19 30 46 -19 8 37 -19 35 37 0.44 - 98 0 0 -19 54 4 23 1 9.4 4 118 13 -19 45 24 -20 2 45 -19 40 33 -20 7 36 0.45 - 97 0 0 -20 26 8 23 1 8.6 5 117 12 -20 17 27 -20 34 50 -20 12 37 -20 39 42 0.45 - 96 0 0 -20 58 19 23 1 7.5 6 117 11 -20 49 37 -21 7 1 -20 44 46 -21 11 53 0.46 - 95 0 0 -21 30 34 23 1 6.2 7 117 10 -21 21 51 -21 39 17 -21 16 59 -21 44 9 0.46 - 94 0 0 -22 2 52 23 1 4.7 8 116 9 -21 54 9 -22 11 36 -21 49 17 -22 16 29 0.46 - 93 0 0 -22 35 13 23 1 3.0 9 116 8 -22 26 29 -22 43 58 -22 21 37 -22 48 51 0.46 - 92 0 0 -23 7 36 23 1 1.0 10 116 7 -22 58 52 -23 16 21 -22 53 59 -23 21 15 0.46 - 91 0 0 -23 40 0 23 0 58.9 11 115 6 -23 31 15 -23 48 46 -23 26 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-30 49 0 -31 16 31 0.54 104 0 0 -30 31 20 22 44 6.0 5 241 -16 -30 22 30 -30 40 10 -30 17 35 -30 45 7 0.56 105 0 0 -29 59 43 22 44 5.1 4 241 -15 -29 50 53 -30 8 33 -29 45 58 -30 13 30 0.59 106 0 0 -29 27 54 22 44 4.5 3 240 -14 -29 19 5 -29 36 45 -29 14 9 -29 41 41 0.63 107 0 0 -28 55 55 22 44 4.1 2 240 -13 -28 47 5 -29 4 45 -28 42 9 -29 9 42 0.73 108 0 0 -28 23 45 22 44 3.8 1 239 -12 -28 14 56 -28 32 36 -28 10 0 -28 37 32 1.18 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 6850-00964-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 02 56.1412 DE: -27 16 12.528 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 02 56.1411 DE: -27 16 12.528 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.5 * B mag [mag]: 11.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4292) Aoba asteroid class: approx. diameter [km]: 25 approx. diameter ["]: 0.018 distance from Earth [AU]: 1.89400 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 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", 0.004", 86.245° remarks: * orbital elements for (4292)Aoba : Mean anomaly = 166.5782481607 deg Arg. of pericenter = 147.0165082278 deg Long. of node = 321.4370435241 deg Inclination = 3.5495124783 deg Eccentricity = 0.0494595680 Semimajor axis = 2.7500371994 AU Perihelion dist = 2.6140215475 AU Mag: H = 12.36, G = 0.15 Epoch of elements : MJD 60499.95320641 TDT (2024 Jul 08.9532) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr24,2.26,2024,7,8,22.876955,-0.043468,-0.437665,-6.261944,0.622423,0.001582,0.000370,0.000001,0.000000 0.5905,-27.2704,-161.83,22.33,False TYC 6850-00964-1,18.04892811,-27.2701466,11.58,11.50,11.46,0.0,0,,18.07492109,-27.2703710,5.02,4.62,0,0,0 4292,Aoba,16.51,25.224,1.8940,0,0,-2.180,2.89,,1.8,0 0,166.3722,2024,7,8,147.0165,321.4370,3.5495,0.04946,2.75004,2.61402,12.36,5.0,0.15 1.279,0.0173,0.0043,86,0.0051,Known errors,0.54,0,-1,-1 20240708_0964-1,60140.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:34 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org