IOTA/IOTA-ES occultation update for (21065) Jamesmelka / TYC 6185-01643-1 event on 2024 Aug 15, 23:37 UT Visible from Summary ------- On 2024 Aug 15 UT, the 15.1481702943094 km diameter asteroid (21065) Jamesmelka will occult a 10.4 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.37 mag to 17.73 mag (the magnitude of the asteroid) for at most 0.910 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: 99 * date and approx. time of event: 2024 Aug 15, 23:30 - 2024 Aug 15, 23:43 * geocentric midpoint of event [JD]: 2460538.48410375 * magnitude of target star: 10.36 * magnitude drop [mag]: 7.37 * estimated maximum duration [s]: 0.910 * Moon: 81 % sunlit, 37° distance * Sun: 93° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 0.30 * 1 sigma uncertainty interval [seconds]: +/- 2.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.028, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.028", 0.002", 83°) * approx speed of asteroid's shadow [km/s]: 16.7440 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6185-01643-1 by 21065 Jamesmelka on 2024 Aug 15 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 -173 0 0 - 3 49 4 23 30 45.6 0 106 73 - 3 53 24 - 3 44 45 - 3 55 58 .. .. .. .... -172 0 0 - 4 6 21 23 30 45.6 1 106 72 - 4 10 40 - 4 2 1 - 4 13 14 - 3 59 28 0.11 -171 0 0 - 4 23 34 23 30 45.8 2 106 72 - 4 27 54 - 4 19 15 - 4 30 27 - 4 16 41 0.08 -170 0 0 - 4 40 45 23 30 46.2 3 106 72 - 4 45 4 - 4 36 26 - 4 47 38 - 4 33 52 0.06 -169 0 0 - 4 57 52 23 30 46.6 4 106 71 - 5 2 11 - 4 53 33 - 5 4 45 - 4 50 59 0.06 -168 0 0 - 5 14 55 23 30 47.2 5 106 71 - 5 19 15 - 5 10 36 - 5 21 48 - 5 8 3 0.05 -167 0 0 - 5 31 54 23 30 47.9 6 106 70 - 5 36 14 - 5 27 35 - 5 38 47 - 5 25 2 0.05 -166 0 0 - 5 48 49 23 30 48.7 7 105 70 - 5 53 8 - 5 44 30 - 5 55 42 - 5 41 57 0.05 -165 0 0 - 6 5 39 23 30 49.6 8 105 69 - 6 9 58 - 6 1 20 - 6 12 31 - 5 58 46 0.05 -164 0 0 - 6 22 23 23 30 50.7 9 105 69 - 6 26 42 - 6 18 4 - 6 29 15 - 6 15 31 0.04 -163 0 0 - 6 39 2 23 30 51.8 10 105 68 - 6 43 21 - 6 34 43 - 6 45 54 - 6 32 10 0.04 -162 0 0 - 6 55 35 23 30 53.2 11 105 67 - 6 59 54 - 6 51 16 - 7 2 27 - 6 48 43 0.04 -161 0 0 - 7 12 2 23 30 54.6 12 105 67 - 7 16 20 - 7 7 43 - 7 18 53 - 7 5 10 0.04 -160 0 0 - 7 28 22 23 30 56.1 13 105 66 - 7 32 40 - 7 24 3 - 7 35 13 - 7 21 30 0.04 -159 0 0 - 7 44 35 23 30 57.8 15 105 65 - 7 48 53 - 7 40 16 - 7 51 26 - 7 37 43 0.04 -158 0 0 - 8 0 40 23 30 59.6 16 104 64 - 8 4 59 - 7 56 22 - 8 7 32 - 7 53 49 0.04 -157 0 0 - 8 16 38 23 31 1.5 17 104 64 - 8 20 56 - 8 12 20 - 8 23 29 - 8 9 48 0.04 -156 0 0 - 8 32 29 23 31 3.5 18 104 63 - 8 36 46 - 8 28 11 - 8 39 19 - 8 25 38 0.04 -155 0 0 - 8 48 10 23 31 5.6 19 104 62 - 8 52 28 - 8 43 53 - 8 55 1 - 8 41 20 0.04 -154 0 0 - 9 3 44 23 31 7.9 20 104 61 - 9 8 1 - 8 59 26 - 9 10 34 - 8 56 53 0.04 -153 0 0 - 9 19 8 23 31 10.3 21 104 61 - 9 23 25 - 9 14 50 - 9 25 58 - 9 12 18 0.04 -152 0 0 - 9 34 23 23 31 12.7 22 104 60 - 9 38 40 - 9 30 6 - 9 41 13 - 9 27 33 0.04 -151 0 0 - 9 49 28 23 31 15.3 23 103 59 - 9 53 45 - 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26 0 0 - 8 5 12 23 42 29.0 32 256 -59 - 8 9 30 - 8 0 54 - 8 12 3 - 7 58 21 0.04 - 25 0 0 - 7 49 1 23 42 32.7 31 256 -60 - 7 53 20 - 7 44 43 - 7 55 53 - 7 42 10 0.04 - 24 0 0 - 7 32 43 23 42 36.2 30 256 -60 - 7 37 2 - 7 28 25 - 7 39 35 - 7 25 51 0.04 - 23 0 0 - 7 16 17 23 42 39.6 29 256 -61 - 7 20 36 - 7 11 59 - 7 23 9 - 7 9 26 0.04 - 22 0 0 - 6 59 45 23 42 42.9 28 256 -62 - 7 4 4 - 6 55 26 - 7 6 37 - 6 52 53 0.04 - 21 0 0 - 6 43 6 23 42 46.1 27 255 -63 - 6 47 25 - 6 38 47 - 6 49 58 - 6 36 14 0.04 - 20 0 0 - 6 26 21 23 42 49.2 26 255 -64 - 6 30 40 - 6 22 2 - 6 33 13 - 6 19 28 0.04 - 19 0 0 - 6 9 30 23 42 52.1 25 255 -65 - 6 13 49 - 6 5 11 - 6 16 22 - 6 2 37 0.04 - 18 0 0 - 5 52 33 23 42 55.0 24 255 -66 - 5 56 53 - 5 48 14 - 5 59 26 - 5 45 41 0.04 - 17 0 0 - 5 35 32 23 42 57.7 23 255 -67 - 5 39 51 - 5 31 13 - 5 42 25 - 5 28 39 0.04 - 16 0 0 - 5 18 26 23 43 0.3 22 255 -67 - 5 22 45 - 5 14 6 - 5 25 19 - 5 11 33 0.04 - 15 0 0 - 5 1 15 23 43 2.8 21 255 -68 - 5 5 34 - 4 56 56 - 5 8 8 - 4 54 22 0.04 - 14 0 0 - 4 44 0 23 43 5.2 20 255 -69 - 4 48 20 - 4 39 41 - 4 50 54 - 4 37 7 0.04 - 13 0 0 - 4 26 42 23 43 7.5 18 255 -70 - 4 31 2 - 4 22 23 - 4 33 35 - 4 19 49 0.04 - 12 0 0 - 4 9 21 23 43 9.6 17 255 -70 - 4 13 40 - 4 5 1 - 4 16 14 - 4 2 27 0.04 - 11 0 0 - 3 51 57 23 43 11.7 16 254 -71 - 3 56 16 - 3 47 37 - 3 58 50 - 3 45 3 0.04 - 10 0 0 - 3 34 30 23 43 13.6 15 254 -72 - 3 38 49 - 3 30 10 - 3 41 23 - 3 27 36 0.04 - 9 0 0 - 3 17 1 23 43 15.3 14 254 -72 - 3 21 21 - 3 12 41 - 3 23 55 - 3 10 7 0.04 - 8 0 0 - 2 59 30 23 43 17.0 13 254 -73 - 3 3 50 - 2 55 11 - 3 6 24 - 2 52 37 0.04 - 7 0 0 - 2 41 59 23 43 18.5 12 254 -74 - 2 46 18 - 2 37 39 - 2 48 52 - 2 35 5 0.05 - 6 0 0 - 2 24 26 23 43 19.9 11 254 -74 - 2 28 46 - 2 20 6 - 2 31 19 - 2 17 32 0.05 - 5 0 0 - 2 6 52 23 43 21.2 10 254 -75 - 2 11 12 - 2 2 33 - 2 13 46 - 1 59 59 0.05 - 4 0 0 - 1 49 19 23 43 22.4 9 254 -75 - 1 53 39 - 1 44 59 - 1 56 13 - 1 42 25 0.05 - 3 0 0 - 1 31 46 23 43 23.4 8 254 -75 - 1 36 5 - 1 27 26 - 1 38 39 - 1 24 52 0.05 - 2 0 0 - 1 14 13 23 43 24.3 7 254 -76 - 1 18 33 - 1 9 53 - 1 21 7 - 1 7 19 0.05 - 1 0 0 - 0 56 41 23 43 25.1 6 254 -76 - 1 1 1 - 0 52 22 - 1 3 35 - 0 49 48 0.06 0 0 0 - 0 39 11 23 43 25.7 5 254 -76 - 0 43 30 - 0 34 51 - 0 46 4 - 0 32 17 0.06 1 0 0 - 0 21 42 23 43 26.3 4 254 -76 - 0 26 2 - 0 17 23 - 0 28 36 - 0 14 49 0.07 2 0 0 - 0 4 16 23 43 26.7 3 254 -76 - 0 8 35 0 0 4 - 0 11 9 0 2 38 0.08 3 0 0 0 13 9 23 43 26.9 2 254 -76 0 8 49 0 17 28 0 6 15 0 20 2 0.10 4 0 0 0 30 30 23 43 27.1 1 254 -76 0 26 10 0 34 49 0 23 37 0 37 23 0.21 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 6185-01643-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 41 04.1691 DE: -15 53 42.391 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 41 04.1688 DE: -15 53 42.390 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.4 * B mag [mag]: 10.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (21065) Jamesmelka asteroid class: approx. diameter [km]: 15 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.23130 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 date of fit: 2023 Apr 25 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): 0.028", 0.002", 83.408° remarks: * orbital elements for (21065)Jamesmelka : Mean anomaly = 349.8027094085 deg Arg. of pericenter = 27.1692748559 deg Long. of node = 249.6399882209 deg Inclination = 16.5902599304 deg Eccentricity = 0.2072419377 Semimajor axis = 3.1388172359 AU Perihelion dist = 2.4883226700 AU Mag: H = 12.89, G = 0.15 Epoch of elements : MJD 60537.98410370 TDT (2024 Aug 15.9841) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr25,0.91,2024,8,15,23.618490,0.001641,-0.027950,9.442931,0.384830,0.005314,-0.001244,0.000000,0.000000 -83.5269,-15.9746,-173.20,13.65,False TYC 6185-01643-1,15.68449143,-15.8951087,10.93,10.36,10.05,0.1,0,,15.70764097,-15.9745603,7.38,7.23,0,0,0 21065,Jamesmelka,17.73,15.310,2.2313,0,0,2.582,1.51,,1.4,0 0,349.6283,2024,8,15,27.1693,249.6400,16.5903,0.20724,3.13882,2.48832,12.88,5.0,0.15 1.296,0.0283,0.0018,83,0.0028,Known errors,1.05,0,-1,-1 20240815_1643-1,60140.25 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org