IOTA/IOTA-ES occultation update for (90) Antiope / TYC 6342-01585-1 event on 2022 Oct 18, 20:12 UT Visible from Africa Summary ------- On 2022 Oct 18 UT, the 120.1 km diameter asteroid (90) Antiope will occult a 11.5 mag star in the constellation Capricornus for observers along a path across Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.08 mag to 13.43 mag (the magnitude of the asteroid) for at most 9.010 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: 100 * date and approx. time of event: 2022 Oct 18, 20:04 - 2022 Oct 18, 20:19 * geocentric midpoint of event [JD]: 2459871.34178313 * magnitude of target star: 11.52 * magnitude drop [mag]: 2.08 * estimated maximum duration [s]: 9.010 * Moon: 39 % sunlit, 177° distance * Sun: 101° distance * rough path description: Africa Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 130 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.002", 77°) * approx speed of asteroid's shadow [km/s]: 13.3335 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6342-01585-1 by 90 Antiope on 2022 Oct 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 ' " Latitude Latitude Latitude Latitude -126 0 0 -37 45 15 20 4 48.7 0 117 62 -38 25 2 .. .. .. -38 27 38 .. .. .. .... -125 0 0 -38 9 19 20 4 48.8 1 116 62 -38 49 1 -37 29 49 -38 51 37 -37 27 15 0.40 -124 0 0 -38 33 0 20 4 49.0 2 116 61 -39 12 37 -37 53 36 -39 15 13 -37 51 2 0.41 -123 0 0 -38 56 19 20 4 49.3 3 115 61 -39 35 50 -38 17 0 -39 38 25 -38 14 26 0.42 -122 0 0 -39 19 14 20 4 49.8 4 114 60 -39 58 40 -38 40 1 -40 1 15 -38 37 28 0.42 -121 0 0 -39 41 46 20 4 50.3 4 114 60 -40 21 6 -39 2 39 -40 23 41 -39 0 5 0.42 -120 0 0 -40 3 55 20 4 51.0 5 113 60 -40 43 9 -39 24 53 -40 45 43 -39 22 20 0.42 -119 0 0 -40 25 39 20 4 51.8 6 112 59 -41 4 47 -39 46 43 -41 7 21 -39 44 11 0.42 -118 0 0 -40 47 0 20 4 52.7 7 112 58 -41 26 2 -40 8 10 -41 28 36 -40 5 38 0.42 -117 0 0 -41 7 57 20 4 53.6 8 111 58 -41 46 53 -40 29 13 -41 49 26 -40 26 41 0.42 -116 0 0 -41 28 30 20 4 54.7 9 110 57 -42 7 20 -40 49 51 -42 9 53 -40 47 20 0.42 -115 0 0 -41 48 38 20 4 55.9 9 110 57 -42 27 22 -41 10 6 -42 29 55 -41 7 35 0.42 -114 0 0 -42 8 23 20 4 57.2 10 109 56 -42 47 1 -41 29 56 -42 49 33 -41 27 26 0.42 -113 0 0 -42 27 43 20 4 58.6 11 108 56 -43 6 14 -41 49 22 -43 8 46 -41 46 52 0.42 -112 0 0 -42 46 38 20 5 0.0 12 108 55 -43 25 4 -42 8 24 -43 27 35 -42 5 54 0.42 -111 0 0 -43 5 10 20 5 1.6 13 107 55 -43 43 29 -42 27 2 -43 46 0 -42 24 32 0.42 -110 0 0 -43 23 17 20 5 3.2 13 106 54 -44 1 30 -42 45 15 -44 4 0 -42 42 46 0.42 -109 0 0 -43 40 59 20 5 4.9 14 106 53 -44 19 6 -43 3 3 -44 21 36 -43 0 35 0.42 -108 0 0 -43 58 17 20 5 6.7 15 105 53 -44 36 18 -43 20 28 -44 38 48 -43 17 59 0.42 -107 0 0 -44 15 11 20 5 8.6 16 104 52 -44 53 6 -43 37 27 -44 55 35 -43 35 0 0.42 -106 0 0 -44 31 41 20 5 10.6 17 103 52 -45 9 30 -43 54 3 -45 11 59 -43 51 36 0.42 -105 0 0 -44 47 46 20 5 12.6 17 103 51 -45 25 29 -44 10 15 -45 27 58 -44 7 48 0.42 -104 0 0 -45 3 28 20 5 14.7 18 102 50 -45 41 5 -44 26 2 -45 43 33 -44 23 35 0.42 -103 0 0 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27 92 42 -48 27 50 -47 15 8 -48 30 13 -47 12 46 0.42 - 90 0 0 -48 1 37 20 5 50.9 28 91 42 -48 37 58 -47 25 25 -48 40 21 -47 23 3 0.42 - 89 0 0 -48 11 26 20 5 53.9 29 90 41 -48 47 43 -47 35 19 -48 50 6 -47 32 58 0.42 - 88 0 0 -48 20 54 20 5 57.0 29 89 41 -48 57 6 -47 44 51 -48 59 28 -47 42 30 0.42 - 87 0 0 -48 29 59 20 6 0.1 30 88 40 -49 6 6 -47 54 0 -49 8 29 -47 51 39 0.42 - 86 0 0 -48 38 41 20 6 3.2 31 88 39 -49 14 45 -48 2 47 -49 17 7 -48 0 26 0.42 - 85 0 0 -48 47 1 20 6 6.4 31 87 39 -49 23 1 -48 11 11 -49 25 23 -48 8 51 0.42 - 84 0 0 -48 54 59 20 6 9.7 32 86 38 -49 30 55 -48 19 13 -49 33 17 -48 16 53 0.42 - 83 0 0 -49 2 35 20 6 13.0 33 85 37 -49 38 28 -48 26 53 -49 40 49 -48 24 33 0.42 - 82 0 0 -49 9 50 20 6 16.3 33 84 37 -49 45 38 -48 34 10 -49 47 59 -48 31 51 0.42 - 81 0 0 -49 16 42 20 6 19.7 34 83 36 -49 52 27 -48 41 6 -49 54 48 -48 38 47 0.42 - 80 0 0 -49 23 12 20 6 23.2 35 82 36 -49 58 54 -48 47 40 -50 1 15 -48 45 21 0.42 - 79 0 0 -49 29 21 20 6 26.6 35 81 35 -50 5 0 -48 53 52 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56 - 3 45 44 - 5 4 27 - 3 43 15 0.78 Uncertainty in time = +/- 2 secs Prediction of 2022 Oct 17.0 Data for the target star ------------------------ * name: TYC 6342-01585-1 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 37 12.9203 DE: -21 09 13.818 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 37 12.9202 DE: -21 09 13.818 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.700,0.500) * V mag [mag]: 11.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (90) Antiope asteroid class: asteroid system: multiple bodies approx. diameter [km]: 120 approx. diameter ["]: 0.074 distance from Earth [AU]: 2.25060 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#119 date of fit: 2022 Sep 23 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): 0.016", 0.002", 77.222° remarks: * orbital elements for (90)Antiope : Mean anomaly = 9.1249109014 deg Arg. of pericenter = 245.1989775018 deg Long. of node = 69.9466017765 deg Inclination = 2.2069149923 deg Eccentricity = 0.1672342101 Semimajor axis = 3.1482626534 AU Perihelion dist = 2.6217654353 AU Mag: H = 8.51, G = 0.15 Epoch of elements : MJD 59870.84173611 TDT (2022 Oct 18.8417) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1192022Sep23,9.01,2022,10,18,20.202795,0.119719,-0.363468,7.147960,2.354566,0.005436,0.001476,0.000000,0.000000 -20.7045,-21.0755,-126.77,-9.83,False TYC 6342-01585-1,20.62025565,-21.1538382,0.00,11.52,0.00,0.0,0,,20.64211084,-21.0755296,2.08,0.00,0,0,0 90,Antiope,13.43,120.1,2.2506,0,1,1.996,9.20,,7.2,0 S/2000 (90) 1,83.8,171,0.687700,0.0030,63.70,,,, 0,8.9764,2022,10,18,245.1990,69.9466,2.2069,0.16723,3.14826,2.62177,8.51,5.0,0.15 1.033,0.0163,0.0018,77,0.0024,Known errors,-1.00,-1,-1,-1 20221018_1585-1,59868.96 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Oct 16, 23:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org