IOTA/IOTA-ES occultation update for (350) Ornamenta / UCAC4 520-011767 event on 2024 Dec 06, 00:21 UT Visible from Summary ------- On 2024 Dec 06 UT, the 122.742077323345 km diameter asteroid (350) Ornamenta will occult a 11.6 mag star in the constellation Orion for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 0.99 mag to 12.04 mag (the magnitude of the asteroid) for at most 8.530 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: 98 * date and approx. time of event: 2024 Dec 06, 00:15 - 2024 Dec 06, 00:27 * geocentric midpoint of event [JD]: 2460650.51478183 * magnitude of target star: 11.60 * magnitude drop [mag]: 0.99 * estimated maximum duration [s]: 8.530 * Moon: 22 % sunlit, 128° distance * Sun: 169° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 155 * 1 sigma uncertainty interval [path widths]: +/- 0.36 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.038, +/- 0.022) * 1 sigma uncertainty ellipse (major, minor, PA): (0.043", 0.004", 60°) * approx speed of asteroid's shadow [km/s]: 14.3982 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 520-011767 by 350 Ornamenta on 2024 Dec 6 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 - 90 0 0 .. .. .... .. .. .. .. .. .. - 7 45 3 .. .. .. - 7 13 58 .. .. .. .... - 89 0 0 - 8 13 41 0 27 7.9 1 76 -6 - 7 30 23 - 8 57 25 - 6 59 23 - 9 29 17 .... - 88 0 0 - 7 59 35 0 27 7.7 2 76 -7 - 7 16 24 - 8 43 12 - 6 45 30 - 9 14 58 0.53 - 87 0 0 - 7 46 12 0 27 7.3 3 75 -8 - 7 3 9 - 8 29 42 - 6 32 19 - 9 1 22 0.61 - 86 0 0 - 7 33 32 0 27 6.7 4 75 -9 - 6 50 35 - 8 16 54 - 6 19 50 - 8 48 30 0.66 - 85 0 0 - 7 21 33 0 27 5.9 5 75 -10 - 6 38 43 - 8 4 49 - 6 8 3 - 8 36 20 0.68 - 84 0 0 - 7 10 18 0 27 5.0 6 75 -11 - 6 27 33 - 7 53 27 - 5 56 57 - 8 24 53 0.70 - 83 0 0 - 6 59 44 0 27 3.9 7 75 -12 - 6 17 6 - 7 42 48 - 5 46 33 - 8 14 10 0.71 - 82 0 0 - 6 49 53 0 27 2.6 8 75 -13 - 6 7 20 - 7 32 51 - 5 36 51 - 8 4 9 0.72 - 81 0 0 - 6 40 43 0 27 1.2 9 75 -14 - 5 58 15 - 7 23 37 - 5 27 50 - 7 54 50 0.73 - 80 0 0 - 6 32 16 0 26 59.6 10 74 -15 - 5 49 52 - 7 15 4 - 5 19 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Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 520-011767 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 18 47.9821 DE: +13 59 12.012 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 18 47.9821 DE: +13 59 12.012 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.6 * B mag [mag]: 12.3 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (350) Ornamenta asteroid class: approx. diameter [km]: 123 approx. diameter ["]: 0.103 distance from Earth [AU]: 1.63970 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#62 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): 0.043", 0.004", 59.799° remarks: * orbital elements for (350)Ornamenta : Mean anomaly = 6.3777380260 deg Arg. of pericenter = 337.4496033845 deg Long. of node = 90.0565011578 deg Inclination = 24.9061143193 deg Eccentricity = 0.1612214041 Semimajor axis = 3.1113642549 AU Perihelion dist = 2.6097457412 AU Mag: H = 8.51, G = 0.15 Epoch of elements : MJD 60650.01478183 TDT (2024 Dec 06.0148) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#622023Apr24,8.53,2024,12,6,0.354764,-0.295635,-0.534061,-7.109935,3.936053,-0.000636,0.000887,0.000002,0.000000 -0.5496,14.0139,172.44,-22.52,False UCAC4 520-011767,5.31332837,13.9866701,12.34,11.60,11.20,0.1,4,,5.33725375,14.0138712,0.99,0.96,0,0,0 350,Ornamenta,12.04,122.861,1.6397,0,0,-2.620,21.11,,6.2,0 0,6.1955,2024,12,5,337.4496,90.0565,24.9061,0.16122,3.11136,2.60975,8.51,5.0,0.15 1.361,0.0433,0.0043,60,0.0373,Known errors,1.61,0,-1,-1 20241206_011767,60140.73 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org