IOTA/IOTA-ES occultation update for (90) Antiope / TYC 1389-00117-1 event on 2024 Dec 27, 07:02 UT Visible from Summary ------- On 2024 Dec 27 UT, the 120.153 km diameter asteroid (90) Antiope will occult a 11.2 mag star in the constellation Cancer for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.86 mag to 13.94 mag (the magnitude of the asteroid) for at most 8.810 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: 2024 Dec 27, 06:55 - 2024 Dec 27, 07:09 * geocentric midpoint of event [JD]: 2460671.79336950 * magnitude of target star: 11.16 * magnitude drop [mag]: 2.86 * estimated maximum duration [s]: 8.810 * Moon: 13 % sunlit, 114° distance * Sun: 156° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 146 * 1 sigma uncertainty interval [path widths]: +/- 0.04 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.003", 102°) * approx speed of asteroid's shadow [km/s]: 13.6433 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1389-00117-1 by 90 Antiope on 2024 Dec 27 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 -163 0 0 -17 30 26 7 8 51.5 1 66 -22 -16 47 13 -18 14 3 -16 43 28 -18 17 54 .... -162 0 0 -17 6 6 7 8 51.3 2 66 -23 -16 23 2 -17 49 35 -16 19 17 -17 53 24 0.39 -161 0 0 -16 42 14 7 8 50.9 3 66 -24 -15 59 19 -17 25 34 -15 55 34 -17 29 23 0.51 -160 0 0 -16 18 51 7 8 50.3 4 66 -25 -15 36 3 -17 2 2 -15 32 20 -17 5 50 0.57 -159 0 0 -15 55 56 7 8 49.6 5 65 -26 -15 13 17 -16 38 59 -15 9 34 -16 42 46 0.60 -158 0 0 -15 33 31 7 8 48.6 6 65 -27 -14 51 0 -16 16 25 -14 47 18 -16 20 12 0.62 -157 0 0 -15 11 35 7 8 47.5 7 65 -28 -14 29 12 -15 54 21 -14 25 31 -15 58 7 0.63 -156 0 0 -14 50 9 7 8 46.2 8 65 -29 -14 7 54 -15 32 47 -14 4 14 -15 36 33 0.64 -155 0 0 -14 29 14 7 8 44.8 9 64 -30 -13 47 6 -15 11 44 -13 43 26 -15 15 28 0.65 -154 0 0 -14 8 48 7 8 43.2 10 64 -31 -13 26 49 -14 51 11 -13 23 9 -14 54 55 0.65 -153 0 0 -13 48 54 7 8 41.3 11 64 -32 -13 7 2 -14 31 9 -13 3 23 -14 34 52 0.66 -152 0 0 -13 29 31 7 8 39.4 12 63 -33 -12 47 46 -14 11 38 -12 44 8 -14 15 20 0.66 -151 0 0 -13 10 38 7 8 37.2 13 63 -34 -12 29 1 -13 52 38 -12 25 23 -13 56 20 0.67 -150 0 0 -12 52 17 7 8 34.9 14 63 -34 -12 10 47 -13 34 10 -12 7 10 -13 37 51 0.67 -149 0 0 -12 34 28 7 8 32.4 15 63 -35 -11 53 4 -13 16 14 -11 49 28 -13 19 54 0.67 -148 0 0 -12 17 10 7 8 29.8 16 62 -36 -11 35 53 -12 58 49 -11 32 17 -13 2 29 0.67 -147 0 0 -12 0 25 7 8 27.0 17 62 -37 -11 19 14 -12 41 57 -11 15 38 -12 45 36 0.67 -146 0 0 -11 44 11 7 8 24.0 18 62 -38 -11 3 6 -12 25 37 -10 59 32 -12 29 15 0.68 -145 0 0 -11 28 29 7 8 20.9 19 62 -39 -10 47 31 -12 9 49 -10 43 57 -12 13 27 0.68 -144 0 0 -11 13 20 7 8 17.6 20 61 -40 -10 32 27 -11 54 34 -10 28 54 -11 58 11 0.68 -143 0 0 -10 58 43 7 8 14.2 21 61 -41 -10 17 56 -11 39 51 -10 14 23 -11 43 28 0.68 -142 0 0 -10 44 38 7 8 10.7 22 61 -42 -10 3 57 -11 25 40 -10 0 24 -11 29 17 0.68 -141 0 0 -10 31 6 7 8 6.9 23 60 -42 - 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Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: TYC 1389-00117-1 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 08 17.3896 DE: +22 14 50.886 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 08 17.3896 DE: +22 14 50.886 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.2 * B mag [mag]: 11.4 * 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 ["]: 0.061 distance from Earth [AU]: 2.71120 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#122 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): 0.016", 0.003", 102.483° remarks: * orbital elements for (90)Antiope : Mean anomaly = 150.8169359928 deg Arg. of pericenter = 244.4446317196 deg Long. of node = 69.9130806106 deg Inclination = 2.2058481906 deg Eccentricity = 0.1713818863 Semimajor axis = 3.1442027621 AU Perihelion dist = 2.6053433619 AU Mag: H = 8.49, G = 0.15 Epoch of elements : MJD 60671.29337117 TDT (2024 Dec 27.2934) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1222023Apr24,8.81,2024,12,27,7.040868,-0.152575,-0.547531,-7.418717,2.064661,-0.002475,0.000340,0.000001,0.000000 -79.4268,22.1740,74.68,-23.30,False TYC 1389-00117-1,8.13816376,22.2474683,11.40,11.16,11.03,0.0,0,,8.16310552,22.1740391,2.86,2.57,0,0,0 90,Antiope,13.94,120.153,2.7112,0,1,-1.732,6.69,,7.2,0 S/2000 (90) 1,83.8,171,0.687700,0.0030,63.70,,,, 0,150.7651,2024,12,27,244.4446,69.9131,2.2058,0.17138,3.14420,2.60534,8.49,5.0,0.15 1.044,0.0160,0.0025,102,0.0027,Known errors,0.79,0,-1,-1 20241227_0117-1,60140.76 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:09 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org