IOTA/IOTA-ES occultation update for (4292) Aoba / TYC 6849-00222-1 event on 2024 Jul 15, 01:58 UT Visible from Summary ------- On 2024 Jul 15 UT, the 25.233 km diameter asteroid (4292) Aoba will occult a 12.0 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 4.67 mag to 16.65 mag (the magnitude of the asteroid) for at most 2.520 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 15, 01:49 - 2024 Jul 15, 02:07 * geocentric midpoint of event [JD]: 2460506.58210117 * magnitude of target star: 11.99 * magnitude drop [mag]: 4.67 * estimated maximum duration [s]: 2.520 * Moon: 60 % sunlit, 55° distance * Sun: 157° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 30 * 1 sigma uncertainty interval [path widths]: +/- 0.30 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.004", 87°) * approx speed of asteroid's shadow [km/s]: 10.0236 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6849-00222-1 by 4292 Aoba on 2024 Jul 15 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 -157 0 0 -21 51 17 2 7 10.9 0 119 22 -21 42 5 -22 0 30 .. .. .. -22 5 57 .... -156 0 0 -22 23 3 2 7 10.7 1 119 21 -22 13 49 -22 32 17 -22 8 22 -22 37 45 0.50 -155 0 0 -22 55 2 2 7 10.3 2 119 20 -22 45 47 -23 4 18 -22 40 20 -23 9 47 0.55 -154 0 0 -23 27 14 2 7 9.6 3 118 19 -23 17 58 -23 36 31 -23 12 29 -23 42 2 0.57 -153 0 0 -23 59 38 2 7 8.6 4 118 18 -23 50 20 -24 8 56 -23 44 51 -24 14 27 0.58 -152 0 0 -24 32 12 2 7 7.4 5 117 17 -24 22 53 -24 41 32 -24 17 23 -24 47 4 0.59 -151 0 0 -25 4 56 2 7 6.0 6 117 16 -24 55 36 -25 14 17 -24 50 5 -25 19 50 0.59 -150 0 0 -25 37 48 2 7 4.3 8 117 15 -25 28 26 -25 47 10 -25 22 55 -25 52 44 0.59 -149 0 0 -26 10 47 2 7 2.3 9 116 14 -26 1 25 -26 20 11 -25 55 52 -26 25 45 0.60 -148 0 0 -26 43 53 2 7 0.1 10 116 13 -26 34 30 -26 53 18 -26 28 56 -26 58 53 0.60 -147 0 0 -27 17 5 2 6 57.7 11 115 12 -27 7 40 -27 26 31 -27 2 6 -27 32 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40 1 50 6.5 21 252 -34 -46 39 16 -46 58 6 -46 33 42 -47 3 41 0.64 38 0 0 -46 23 5 1 50 2.8 20 251 -33 -46 13 39 -46 32 31 -46 8 5 -46 38 7 0.64 39 0 0 -45 57 4 1 49 59.3 19 250 -32 -45 47 37 -46 6 32 -45 42 2 -46 12 9 0.64 40 0 0 -45 30 39 1 49 55.8 18 250 -32 -45 21 11 -45 40 8 -45 15 36 -45 45 46 0.64 41 0 0 -45 3 50 1 49 52.5 17 249 -31 -44 54 21 -45 13 20 -44 48 44 -45 18 58 0.64 42 0 0 -44 36 36 1 49 49.2 17 248 -30 -44 27 6 -44 46 8 -44 21 29 -44 51 46 0.64 43 0 0 -44 8 59 1 49 46.1 16 247 -30 -43 59 28 -44 18 32 -43 53 51 -44 24 11 0.64 44 0 0 -43 40 59 1 49 43.1 15 247 -29 -43 31 27 -43 50 32 -43 25 49 -43 56 12 0.65 45 0 0 -43 12 35 1 49 40.3 14 246 -28 -43 3 2 -43 22 9 -42 57 23 -43 27 50 0.65 46 0 0 -42 43 49 1 49 37.6 13 245 -27 -42 34 15 -42 53 24 -42 28 36 -42 59 5 0.65 47 0 0 -42 14 40 1 49 35.0 12 244 -27 -42 5 6 -42 24 16 -41 59 26 -42 29 57 0.65 48 0 0 -41 45 10 1 49 32.6 11 244 -26 -41 35 35 -41 54 47 -41 29 55 -42 0 29 0.65 49 0 0 -41 15 19 1 49 30.3 11 243 -25 -41 5 43 -41 24 56 -41 0 3 -41 30 38 0.66 50 0 0 -40 45 7 1 49 28.2 10 242 -24 -40 35 31 -40 54 45 -40 29 50 -41 0 28 0.66 51 0 0 -40 14 36 1 49 26.2 9 242 -23 -40 4 59 -40 24 14 -39 59 18 -40 29 57 0.67 52 0 0 -39 43 45 1 49 24.4 8 241 -23 -39 34 7 -39 53 23 -39 28 26 -39 59 6 0.67 53 0 0 -39 12 35 1 49 22.9 7 241 -22 -39 2 57 -39 22 14 -38 57 16 -39 27 57 0.68 54 0 0 -38 41 8 1 49 21.4 6 240 -21 -38 31 30 -38 50 47 -38 25 48 -38 56 30 0.69 55 0 0 -38 9 23 1 49 20.2 5 239 -20 -37 59 45 -38 19 3 -37 54 3 -38 24 46 0.71 56 0 0 -37 37 22 1 49 19.2 4 239 -19 -37 27 43 -37 47 2 -37 22 2 -37 52 45 0.73 57 0 0 -37 5 5 1 49 18.4 3 238 -18 -36 55 27 -37 14 45 -36 49 45 -37 20 29 0.77 58 0 0 -36 32 34 1 49 17.7 2 237 -17 -36 22 55 -36 42 14 -36 17 13 -36 47 57 0.84 59 0 0 -35 59 49 1 49 17.3 1 237 -16 -35 50 10 -36 9 28 -35 44 28 -36 15 12 1.02 60 0 0 -35 26 51 1 49 17.2 0 236 -15 -35 17 12 -35 36 30 -35 11 30 -35 42 14 2.60 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 6849-00222-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 57 53.7149 DE: -27 08 05.646 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 57 53.7148 DE: -27 08 05.646 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.4 * 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]: 1.92250 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", 86.817° remarks: * orbital elements for (4292)Aoba : Mean anomaly = 167.9006079528 deg Arg. of pericenter = 147.0186216667 deg Long. of node = 321.4368533242 deg Inclination = 3.5495244339 deg Eccentricity = 0.0494639192 Semimajor axis = 2.7500270306 AU Perihelion dist = 2.6139999157 AU Mag: H = 12.36, G = 0.15 Epoch of elements : MJD 60506.08210109 TDT (2024 Jul 15.0821) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr24,2.52,2024,7,15,1.970428,-0.073021,-0.530334,-5.604283,0.774819,0.002224,0.000329,0.000001,0.000000 -53.1130,-27.1382,151.95,21.46,False TYC 6849-00222-1,17.96492083,-27.1349016,12.38,11.99,11.78,0.0,0,,17.99087883,-27.1382353,4.67,4.43,0,0,0 4292,Aoba,16.65,25.233,1.9225,0,0,-1.920,3.55,,1.8,0 0,167.6667,2024,7,14,147.0186,321.4369,3.5495,0.04946,2.75003,2.61400,12.36,5.0,0.15 1.296,0.0170,0.0043,87,0.0054,Known errors,0.61,0,-1,-1 20240715_0222-1,60140.20 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org