IOTA/IOTA-ES occultation update for (194) Prokne / UCAC4 415-130480 event on 2024 Mar 09, 03:32 UT Visible from Summary ------- On 2024 Mar 09 UT, the 170.612517461027 km diameter asteroid (194) Prokne will occult a 11.3 mag star in the constellation Aquila for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.59 mag to 12.62 mag (the magnitude of the asteroid) for at most 4.260 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 Mar 09, 03:29 - 2024 Mar 09, 03:34 * geocentric midpoint of event [JD]: 2460378.64740100 * magnitude of target star: 11.32 * magnitude drop [mag]: 1.59 * estimated maximum duration [s]: 4.260 * Moon: 2 % sunlit, 39° distance * Sun: 53° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 176 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 0.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.001", 90°) * approx speed of asteroid's shadow [km/s]: 40.0933 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 415-130480 by 194 Prokne on 2024 Mar 9 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 - 16 0 0 .. .. .... .. .. .. .. .. .. -25 54 10 .. .. .. -25 56 17 .. .. .. .... - 15 0 0 -25 13 21 3 29 41.1 1 97 -45 -26 1 34 -24 25 17 -26 3 41 -24 23 12 .... - 14 0 0 -25 20 35 3 29 41.1 2 97 -44 -26 8 47 -24 32 32 -26 10 53 -24 30 27 0.21 - 13 0 0 -25 27 36 3 29 41.2 3 97 -44 -26 15 47 -24 39 35 -26 17 53 -24 37 30 0.23 - 12 0 0 -25 34 26 3 29 41.4 4 96 -43 -26 22 36 -24 46 27 -26 24 42 -24 44 21 0.23 - 11 0 0 -25 41 4 3 29 41.6 5 96 -42 -26 29 12 -24 53 6 -26 31 18 -24 51 1 0.24 - 10 0 0 -25 47 30 3 29 41.8 5 95 -41 -26 35 37 -24 59 33 -26 37 43 -24 57 27 0.24 - 9 0 0 -25 53 43 3 29 42.1 6 95 -40 -26 41 49 -25 5 47 -26 43 55 -25 3 42 0.24 - 8 0 0 -25 59 44 3 29 42.4 7 94 -39 -26 47 49 -25 11 50 -26 49 55 -25 9 45 0.24 - 7 0 0 -26 5 33 3 29 42.7 8 94 -39 -26 53 36 -25 17 40 -26 55 42 -25 15 35 0.24 - 6 0 0 -26 11 9 3 29 43.1 9 94 -38 -26 59 11 -25 23 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0.27 157 0 0 - 4 7 33 3 34 47.5 9 263 62 - 4 56 0 - 3 19 17 - 4 58 7 - 3 17 11 0.27 158 0 0 - 3 58 12 3 34 47.9 8 263 61 - 4 46 37 - 3 9 57 - 4 48 44 - 3 7 51 0.27 159 0 0 - 3 49 2 3 34 48.3 7 263 60 - 4 37 26 - 3 0 48 - 4 39 33 - 2 58 42 0.28 160 0 0 - 3 40 4 3 34 48.7 6 263 59 - 4 28 27 - 2 51 52 - 4 30 33 - 2 49 46 0.28 161 0 0 - 3 31 18 3 34 49.0 5 263 58 - 4 19 39 - 2 43 7 - 4 21 46 - 2 41 2 0.28 162 0 0 - 3 22 45 3 34 49.2 4 263 57 - 4 11 5 - 2 34 35 - 4 13 11 - 2 32 30 0.29 163 0 0 - 3 14 24 3 34 49.4 3 263 56 - 4 2 42 - 2 26 16 - 4 4 49 - 2 24 10 0.30 164 0 0 - 3 6 16 3 34 49.6 2 263 55 - 3 54 33 - 2 18 9 - 3 56 39 - 2 16 3 0.32 165 0 0 - 2 58 20 3 34 49.7 1 263 54 - 3 46 36 - 2 10 15 - 3 48 42 - 2 8 9 0.38 166 0 0 - 2 50 37 3 34 49.7 0 263 53 - 3 38 51 - 2 2 33 - 3 40 58 - 2 0 28 0.69 Uncertainty in time = +/- 0 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: UCAC4 415-130480 * constellation : Aquila * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 47 01.4322 DE: -07 09 14.124 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 47 01.4322 DE: -07 09 14.124 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.3 * B mag [mag]: 12.4 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (194) Prokne asteroid class: approx. diameter [km]: 171 approx. diameter ["]: 0.091 distance from Earth [AU]: 2.58500 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#152 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): 0.008", 0.001", 90° remarks: * orbital elements for (194)Prokne : Mean anomaly = 329.5714888462 deg Arg. of pericenter = 163.1873366233 deg Long. of node = 159.2521302677 deg Inclination = 18.5084569951 deg Eccentricity = 0.2372575531 Semimajor axis = 2.6164189890 AU Perihelion dist = 1.9956538218 AU Mag: H = 7.87, G = 0.15 Epoch of elements : MJD 60378.14740091 TDT (2024 Mar 09.1474) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1522023Apr24,4.26,2024,3,9,3.537624,0.047560,-0.236750,22.200591,4.386512,-0.004391,0.000009,-0.000001,0.000000 76.6912,-7.0972,129.56,-4.33,False UCAC4 415-130480,19.78373110,-7.1539232,12.42,11.32,10.73,0.1,0,,19.80509782,-7.0971961,1.59,1.70,0,0,0 194,Prokne,12.62,170.800,2.5850,0,0,5.074,14.92,,8.6,0 0,329.5372,2024,3,9,163.1873,159.2521,18.5085,0.23726,2.61642,1.99565,7.86,5.0,0.15 1.022,0.0083,0.0012,90,0.0020,Known errors,1.50,0,-1,-1 20240309_130480,60139.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org