IOTA/IOTA-ES occultation update for (694) Ekard / TYC 5119-00567-1 event on 2022 Oct 01, 14:01 UT Visible from S Australia Summary ------- On 2022 Oct 01 UT, the 97.6 km diameter asteroid (694) Ekard will occult a 11.4 mag star in the constellation Aquila for observers along a path across S Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.59 mag to 12.69 mag (the magnitude of the asteroid) for at most 5.780 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: 2022 Oct 01, 13:55 - 2022 Oct 01, 14:07 * geocentric midpoint of event [JD]: 2459854.08417987 * magnitude of target star: 11.39 * magnitude drop [mag]: 1.59 * estimated maximum duration [s]: 5.780 * Moon: 35 % sunlit, 35° distance * Sun: 97° distance * rough path description: S Australia The occultation path -------------------- * approximate projected width [km]: 104 * 1 sigma uncertainty interval [path widths]: +/- 0.25 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.033, +/- 0.020) * 1 sigma uncertainty ellipse (major, minor, PA): (0.035", 0.016", 69°) * approx speed of asteroid's shadow [km/s]: 16.8970 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5119-00567-1 by 694 Ekard on 2022 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 - 24 0 0 - 7 21 34 13 55 17.8 0 92 82 - 7 49 46 - 6 53 28 - 8 3 47 - 6 39 33 .... - 23 0 0 - 7 23 47 13 55 17.9 1 92 81 - 7 51 59 - 6 55 40 - 8 6 0 - 6 41 44 0.24 - 22 0 0 - 7 26 13 13 55 18.1 2 92 80 - 7 54 25 - 6 58 6 - 8 8 27 - 6 44 11 0.29 - 21 0 0 - 7 28 54 13 55 18.5 3 91 79 - 7 57 7 - 7 0 46 - 8 11 8 - 6 46 51 0.31 - 20 0 0 - 7 31 49 13 55 19.0 4 91 78 - 8 0 2 - 7 3 41 - 8 14 4 - 6 49 46 0.32 - 19 0 0 - 7 34 59 13 55 19.5 5 91 77 - 8 3 12 - 7 6 50 - 8 17 14 - 6 52 54 0.33 - 18 0 0 - 7 38 22 13 55 20.3 6 91 76 - 8 6 36 - 7 10 13 - 8 20 39 - 6 56 17 0.33 - 17 0 0 - 7 42 0 13 55 21.1 7 91 75 - 8 10 15 - 7 13 51 - 8 24 17 - 6 59 55 0.34 - 16 0 0 - 7 45 52 13 55 22.0 8 91 74 - 8 14 7 - 7 17 42 - 8 28 10 - 7 3 46 0.34 - 15 0 0 - 7 49 58 13 55 23.1 9 91 73 - 8 18 14 - 7 21 48 - 8 32 17 - 7 7 51 0.34 - 14 0 0 - 7 54 19 13 55 24.3 10 91 72 - 8 22 35 - 7 26 8 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13 49 14 6 52.4 16 278 -53 -32 41 57 -31 45 47 -32 55 56 -31 31 53 0.37 136 0 0 -32 15 39 14 6 54.0 15 278 -53 -32 43 47 -31 47 37 -32 57 46 -31 33 44 0.37 137 0 0 -32 17 17 14 6 55.5 14 277 -54 -32 45 24 -31 49 14 -32 59 23 -31 35 21 0.37 138 0 0 -32 18 42 14 6 57.0 14 276 -54 -32 46 49 -31 50 40 -33 0 48 -31 36 47 0.37 139 0 0 -32 19 55 14 6 58.3 13 276 -54 -32 48 2 -31 51 52 -33 2 1 -31 38 0 0.37 140 0 0 -32 20 55 14 6 59.6 12 275 -54 -32 49 2 -31 52 53 -33 3 1 -31 39 0 0.37 141 0 0 -32 21 43 14 7 0.8 11 275 -54 -32 49 50 -31 53 41 -33 3 48 -31 39 48 0.37 142 0 0 -32 22 18 14 7 1.9 10 274 -54 -32 50 25 -31 54 16 -33 4 24 -31 40 23 0.37 143 0 0 -32 22 41 14 7 2.9 9 274 -54 -32 50 48 -31 54 39 -33 4 47 -31 40 46 0.37 144 0 0 -32 22 52 14 7 3.8 9 273 -54 -32 50 59 -31 54 50 -33 4 58 -31 40 57 0.38 145 0 0 -32 22 50 14 7 4.7 8 273 -54 -32 50 57 -31 54 48 -33 4 56 -31 40 55 0.38 146 0 0 -32 22 36 14 7 5.4 7 272 -54 -32 50 43 -31 54 34 -33 4 42 -31 40 41 0.38 147 0 0 -32 22 10 14 7 6.1 6 272 -54 -32 50 17 -31 54 7 -33 4 16 -31 40 14 0.38 148 0 0 -32 21 31 14 7 6.7 5 271 -54 -32 49 38 -31 53 28 -33 3 37 -31 39 36 0.39 149 0 0 -32 20 40 14 7 7.1 4 270 -54 -32 48 47 -31 52 37 -33 2 46 -31 38 44 0.40 150 0 0 -32 19 37 14 7 7.5 3 270 -54 -32 47 44 -31 51 34 -33 1 43 -31 37 41 0.40 151 0 0 -32 18 21 14 7 7.9 3 269 -54 -32 46 29 -31 50 18 -33 0 28 -31 36 25 0.42 152 0 0 -32 16 53 14 7 8.1 2 269 -54 -32 45 1 -31 48 50 -32 59 1 -31 34 56 0.45 153 0 0 -32 15 13 14 7 8.2 1 268 -54 -32 43 21 -31 47 9 -32 57 21 -31 33 16 0.54 154 0 0 -32 13 21 14 7 8.3 0 268 -54 -32 41 29 -31 45 17 -32 55 29 -31 31 23 2.65 Uncertainty in time = +/- 2 secs Prediction of 2022 Aug 20.1 Data for the target star ------------------------ * name: TYC 5119-00567-1 * constellation : Aquila * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 58 43.6506 DE: -01 55 25.504 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 58 43.6505 DE: -01 55 25.504 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (694) Ekard asteroid class: approx. diameter [km]: 98 approx. diameter ["]: 0.094 distance from Earth [AU]: 1.42460 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 date of fit: 2022 Aug 01 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): 0.035", 0.016", 69.003° remarks: * orbital elements for (694)Ekard : Mean anomaly = 349.1966540271 deg Arg. of pericenter = 111.8951471096 deg Long. of node = 229.9701145907 deg Inclination = 15.8939439830 deg Eccentricity = 0.3231081507 Semimajor axis = 2.6704251787 AU Perihelion dist = 1.8075890375 AU Mag: H = 9.23, G = 0.15 Epoch of elements : MJD 59853.58416667 TDT (2022 Oct 01.5842) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492022Aug01,5.78,2022,10,1,14.020317,-0.072392,-0.328803,9.315611,-2.043502,0.005008,0.000328,0.000000,0.000000 64.3855,-1.8915,-32.89,-3.32,False TYC 5119-00567-1,18.97879185,-1.9237512,0.00,11.39,0.00,0.0,4,,18.99830724,-1.8915010,1.59,0.00,0,0,0 694,Ekard,12.69,97.6,1.4246,0,0,3.837,-12.61,,4.8,0 0,349.0647,2022,10,1,111.8951,229.9701,15.8939,0.32311,2.67043,1.80759,9.22,5.0,0.15 1.248,0.0350,0.0160,69,0.0234,Known errors,-1.00,-1,-1,-1 20221001_0567-1,59811.11 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Aug 20, 02:34 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org