IOTA/IOTA-ES occultation update for (365) Corduba / TYC 4686-00589-1 event on 2022 Nov 18, 02:47 UT Visible from W Africa, South America Summary ------- On 2022 Nov 18 UT, the 99.2 km diameter asteroid (365) Corduba will occult a 8.7 mag star in the constellation Cetus for observers along a path across W Africa, South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.08 mag to 12.73 mag (the magnitude of the asteroid) for at most 15.740 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 Nov 18, 02:32 - 2022 Nov 18, 03:03 * geocentric midpoint of event [JD]: 2459901.61662779 * magnitude of target star: 8.68 * magnitude drop [mag]: 4.08 * estimated maximum duration [s]: 15.740 * Moon: 34 % sunlit, 138° distance * Sun: 148° distance * rough path description: W Africa, South America The occultation path -------------------- * approximate projected width [km]: 109 * 1 sigma uncertainty interval [path widths]: +/- 0.21 * 1 sigma uncertainty interval [seconds]: +/- 6.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.040, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.041", 0.002", 82°) * approx speed of asteroid's shadow [km/s]: 6.3026 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4686-00589-1 by 365 Corduba on 2022 Nov 18 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 ' " Longitude Longitude Longitude Longitude .. .. .. 13 0 0 .. .. .... .. .. .. 18 30 48 ... .. .. 15 34 41 ... .. .. .... 12 42 13 12 0 0 2 32 52.8 10 267 -37 9 8 45 18 13 42 7 51 40 ... .. .. .... 6 15 1 11 0 0 2 33 19.8 16 266 -43 3 47 41 9 5 45 2 49 39 10 29 43 0.36 Latitude Latitude Latitude Latitude 5 0 0 10 45 14 2 33 26.5 17 266 -44 11 15 8 10 15 12 11 27 54 10 2 18 0.43 4 0 0 10 32 40 2 33 32.3 18 266 -45 11 2 39 10 2 35 11 15 26 9 49 40 0.43 3 0 0 10 19 28 2 33 38.4 19 266 -46 10 49 30 9 49 19 11 2 20 9 36 23 0.43 2 0 0 10 5 37 2 33 44.8 20 266 -46 10 35 43 9 35 24 10 48 34 9 22 26 0.43 1 0 0 9 51 7 2 33 51.5 21 266 -47 10 21 17 9 20 50 10 34 10 9 7 50 0.43 0 0 0 9 35 58 2 33 58.5 22 266 -48 10 6 12 9 5 36 10 19 7 8 52 34 0.43 - 1 0 0 9 20 10 2 34 5.8 23 265 -49 9 50 29 8 49 44 10 3 25 8 36 40 0.43 - 2 0 0 9 3 43 2 34 13.5 24 265 -50 9 34 6 8 33 12 9 47 5 8 20 6 0.43 - 3 0 0 8 46 37 2 34 21.5 25 265 -51 9 17 5 8 16 2 9 30 6 8 2 53 0.43 - 4 0 0 8 28 53 2 34 29.8 26 265 -51 8 59 26 7 58 12 9 12 28 7 45 2 0.43 - 5 0 0 8 10 29 2 34 38.4 27 265 -52 8 41 8 7 39 43 8 54 13 7 26 31 0.43 - 6 0 0 7 51 27 2 34 47.3 28 265 -53 8 22 11 7 20 36 8 35 18 7 7 21 0.43 - 7 0 0 7 31 47 2 34 56.6 29 265 -54 8 2 36 7 0 50 8 15 46 6 47 32 0.43 - 8 0 0 7 11 28 2 35 6.2 30 265 -54 7 42 23 6 40 25 7 55 34 6 27 5 0.43 - 9 0 0 6 50 30 2 35 16.1 31 265 -55 7 21 31 6 19 21 7 34 45 6 5 59 0.43 - 10 0 0 6 28 54 2 35 26.3 32 265 -56 7 0 1 5 57 39 7 13 18 5 44 14 0.43 - 11 0 0 6 6 40 2 35 36.8 33 265 -57 6 37 53 5 35 19 6 51 12 5 21 51 0.43 - 12 0 0 5 43 47 2 35 47.7 34 266 -57 6 15 7 5 12 20 6 28 29 4 58 50 0.43 - 13 0 0 5 20 17 2 35 58.8 35 266 -58 5 51 43 4 48 43 6 5 8 4 35 10 0.43 - 14 0 0 4 56 8 2 36 10.3 36 266 -59 5 27 41 4 24 28 5 41 9 4 10 52 0.43 - 15 0 0 4 31 22 2 36 22.1 37 266 -59 5 3 1 3 59 35 5 16 32 3 45 56 0.43 - 16 0 0 4 5 59 2 36 34.2 38 266 -60 4 37 45 3 34 4 4 51 18 3 20 22 0.43 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1 20 -62 0 4 -60 48 49 -62 12 42 0.71 Uncertainty in time = +/- 7 secs Prediction of 2022 Oct 2.0 Data for the target star ------------------------ * name: TYC 4686-00589-1 * constellation : Cetus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 01 50 57.9901 DE: -00 38 23.266 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 01 50 57.9901 DE: -00 38 23.266 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 8.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (365) Corduba asteroid class: approx. diameter [km]: 99 approx. diameter ["]: 0.093 distance from Earth [AU]: 1.46630 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#78 date of fit: 2022 Sep 21 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): 0.041", 0.002", 82.32° remarks: * orbital elements for (365)Corduba : Mean anomaly = 358.3371646586 deg Arg. of pericenter = 215.4670768718 deg Long. of node = 185.1415197130 deg Inclination = 12.8006038908 deg Eccentricity = 0.1564207861 Semimajor axis = 2.8030931746 AU Perihelion dist = 2.3646311368 AU Mag: H = 9.27, G = 0.15 Epoch of elements : MJD 59901.11638889 TDT (2022 Nov 18.1164) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#782022Sep21,15.74,2022,11,18,2.799067,0.249322,-0.328552,-2.843933,-2.137065,0.002291,0.001917,0.000001,0.000000 -71.0848,-0.5264,134.28,-19.19,False TYC 4686-00589-1,1.84944171,-0.6397962,0.00,8.68,0.00,0.0,0,,1.86905179,-0.5263526,4.08,0.00,0,0,0 365,Corduba,12.73,99.2,1.4663,0,0,-1.136,-12.81,,5.0,0 0,358.1027,2022,11,17,215.4671,185.1415,12.8006,0.15642,2.80309,2.36463,9.28,5.0,0.15 1.214,0.0407,0.0022,82,0.0200,Known errors,-1.00,-1,-1,-1 20221118_0589-1,59854.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Oct 02, 00:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org