IOTA/IOTA-ES occultation update for (224) Oceana / UCAC4 385-062645 event on 2024 Aug 05, 10:10 UT Visible from Summary ------- On 2024 Aug 05 UT, the 59.562 km diameter asteroid (224) Oceana will occult a 10.9 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.08 mag to 13.94 mag (the magnitude of the asteroid) for at most 2.170 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 Aug 05, 10:06 - 2024 Aug 05, 10:14 * geocentric midpoint of event [JD]: 2460527.92403938 * magnitude of target star: 10.93 * magnitude drop [mag]: 3.08 * estimated maximum duration [s]: 2.170 * Moon: 1 % sunlit, 59° distance * Sun: 70° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 61 * 1 sigma uncertainty interval [path widths]: +/- 0.09 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.002", 122°) * approx speed of asteroid's shadow [km/s]: 27.4188 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 385-062645 by 224 Oceana on 2024 Aug 5 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 6 0 0 6 45 57 10 6 51.3 0 103 65 6 28 47 7 3 5 6 25 35 7 6 17 .... 7 0 0 6 31 23 10 6 51.4 1 103 65 6 14 12 6 48 33 6 10 59 6 51 45 0.22 8 0 0 6 16 24 10 6 51.5 2 104 66 5 59 11 6 33 35 5 55 58 6 36 48 0.24 9 0 0 6 0 59 10 6 51.7 3 104 67 5 43 45 6 18 13 5 40 31 6 21 26 0.24 10 0 0 5 45 10 10 6 52.0 4 104 68 5 27 53 6 2 25 5 24 39 6 5 38 0.25 11 0 0 5 28 55 10 6 52.4 5 104 68 5 11 36 5 46 12 5 8 22 5 49 25 0.25 12 0 0 5 12 15 10 6 52.9 7 104 69 4 54 55 5 29 34 4 51 40 5 32 48 0.25 13 0 0 4 55 10 10 6 53.4 8 104 70 4 37 48 5 12 31 4 34 33 5 15 46 0.25 14 0 0 4 37 41 10 6 54.0 9 104 70 4 20 17 4 55 4 4 17 2 4 58 19 0.25 15 0 0 4 19 48 10 6 54.7 10 104 71 4 2 22 4 37 12 3 59 6 4 40 28 0.25 16 0 0 4 1 30 10 6 55.5 11 104 71 3 44 3 4 18 57 3 40 47 4 22 12 0.25 17 0 0 3 42 49 10 6 56.3 12 104 72 3 25 19 4 0 17 3 22 3 4 3 33 0.26 18 0 0 3 23 44 10 6 57.3 13 104 72 3 6 12 3 41 14 3 2 55 3 44 30 0.26 19 0 0 3 4 15 10 6 58.3 14 104 73 2 46 41 3 21 47 2 43 24 3 25 4 0.26 20 0 0 2 44 23 10 6 59.4 15 104 73 2 26 47 3 1 57 2 23 30 3 5 14 0.26 21 0 0 2 24 8 10 7 0.6 16 104 73 2 6 30 2 41 45 2 3 13 2 45 2 0.26 22 0 0 2 3 31 10 7 1.8 17 104 73 1 45 51 2 21 9 1 42 33 2 24 27 0.26 23 0 0 1 42 31 10 7 3.2 18 105 74 1 24 49 2 0 12 1 21 31 2 3 30 0.26 24 0 0 1 21 10 10 7 4.6 19 105 74 1 3 26 1 38 52 1 0 7 1 42 10 0.26 25 0 0 0 59 26 10 7 6.1 20 104 74 0 41 40 1 17 11 0 38 21 1 20 29 0.26 26 0 0 0 37 22 10 7 7.7 21 104 73 0 19 34 0 55 8 0 16 14 0 58 27 0.26 27 0 0 0 14 56 10 7 9.3 22 104 73 - 0 2 54 0 32 45 - 0 6 14 0 36 4 0.26 28 0 0 - 0 7 50 10 7 11.1 23 104 73 - 0 25 41 0 10 1 - 0 29 2 0 13 21 0.26 29 0 0 - 0 30 55 10 7 12.9 24 104 73 - 0 48 49 - 0 13 3 - 0 52 10 - 0 9 43 0.26 30 0 0 - 0 54 21 10 7 14.8 26 104 72 - 1 12 17 - 0 36 27 - 1 15 38 - 0 33 6 0.26 31 0 0 - 1 18 6 10 7 16.8 27 104 72 - 1 36 4 - 1 0 10 - 1 39 25 - 0 56 49 0.26 32 0 0 - 1 42 9 10 7 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-34 52 30 -34 11 24 0.91 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 385-062645 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 13 19 32.3265 DE: -13 05 54.486 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 13 19 32.3262 DE: -13 05 54.484 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.9 * B mag [mag]: 11.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (224) Oceana asteroid class: approx. diameter [km]: 60 approx. diameter ["]: 0.030 distance from Earth [AU]: 2.72500 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#70 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): 0.010", 0.002", 121.845° remarks: * orbital elements for (224)Oceana : Mean anomaly = 314.3332233195 deg Arg. of pericenter = 282.0799342873 deg Long. of node = 352.7476394810 deg Inclination = 5.8443765739 deg Eccentricity = 0.0448731338 Semimajor axis = 2.6455454023 AU Perihelion dist = 2.5268314895 AU Mag: H = 8.67, G = 0.15 Epoch of elements : MJD 60527.42403954 TDT (2024 Aug 05.4240) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#702023Apr24,2.17,2024,8,5,10.176945,-0.087731,-0.228437,14.432940,-5.585258,0.004761,-0.002079,-0.000001,0.000000 93.0980,-13.2275,28.84,16.77,False UCAC4 385-062645,13.32564627,-13.0984685,11.20,10.93,10.78,0.0,0,,13.34719247,-13.2274588,3.08,2.79,0,0,0 224,Oceana,13.94,59.562,2.7250,0,0,3.190,-18.03,,2.8,0 0,314.2361,2024,8,5,282.0799,352.7476,5.8444,0.04487,2.64555,2.52683,8.66,5.0,0.15 1.093,0.0100,0.0022,122,0.0028,Known errors,1.19,0,-1,-1 20240805_062645,60140.23 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:36 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org