IOTA/IOTA-ES occultation update for (9414) Masamimurakami / UCAC4 315-214379 event on 2024 Apr 09, 08:54 UT Visible from Summary ------- On 2024 Apr 09 UT, the 12.43 km diameter asteroid (9414) Masamimurakami will occult a 11.9 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.76 mag to 16.66 mag (the magnitude of the asteroid) for at most 0.820 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: 96 * date and approx. time of event: 2024 Apr 09, 08:47 - 2024 Apr 09, 09:00 * geocentric midpoint of event [JD]: 2460409.87086725 * magnitude of target star: 11.91 * magnitude drop [mag]: 4.76 * estimated maximum duration [s]: 0.820 * Moon: 1 % sunlit, 110° distance * Sun: 100° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.42 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.002", 96°) * approx speed of asteroid's shadow [km/s]: 15.1079 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 315-214379 by 9414 Masamimurakami on 2024 Apr 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 -139 0 0 - 1 33 8 8 47 25.5 1 117 -80 - 1 37 11 - 1 29 5 - 1 40 32 - 1 25 43 .... -138 0 0 - 2 4 38 8 47 25.7 2 117 -81 - 2 8 42 - 2 0 34 - 2 12 4 - 1 57 12 0.35 -137 0 0 - 2 36 39 8 47 26.1 3 117 -82 - 2 40 44 - 2 32 34 - 2 44 7 - 2 29 11 0.36 -136 0 0 - 3 9 10 8 47 26.6 4 117 -84 - 3 13 15 - 3 5 4 - 3 16 39 - 3 1 40 0.36 -135 0 0 - 3 42 10 8 47 27.4 5 117 -85 - 3 46 16 - 3 38 3 - 3 49 41 - 3 34 39 0.36 -134 0 0 - 4 15 39 8 47 28.3 6 117 -86 - 4 19 46 - 4 11 31 - 4 23 11 - 4 8 6 0.37 -133 0 0 - 4 49 35 8 47 29.4 8 117 -87 - 4 53 44 - 4 45 27 - 4 57 10 - 4 42 1 0.37 -132 0 0 - 5 23 59 8 47 30.7 9 117 -87 - 5 28 8 - 5 19 50 - 5 31 35 - 5 16 24 0.37 -131 0 0 - 5 58 49 8 47 32.1 10 117 -88 - 6 3 0 - 5 54 39 - 6 6 27 - 5 51 12 0.37 -130 0 0 - 6 34 5 8 47 33.8 11 116 -88 - 6 38 16 - 6 29 55 - 6 41 44 - 6 26 27 0.37 -129 0 0 - 7 9 46 8 47 35.6 12 116 -87 - 7 13 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42 -40 27 36 -40 19 22 -40 31 1 -40 15 58 0.39 44 0 0 -39 57 22 9 0 29.3 12 245 42 -40 1 29 -39 53 14 -40 4 55 -39 49 49 0.40 45 0 0 -39 30 44 9 0 30.8 12 244 43 -39 34 52 -39 26 35 -39 38 18 -39 23 10 0.40 46 0 0 -39 3 35 9 0 32.2 11 244 43 -39 7 45 -38 59 26 -39 11 11 -38 56 0 0.40 47 0 0 -38 35 57 9 0 33.5 10 243 44 -38 40 7 -38 31 47 -38 43 34 -38 28 20 0.41 48 0 0 -38 7 48 9 0 34.6 9 242 44 -38 11 59 -38 3 37 -38 15 27 -38 0 9 0.41 49 0 0 -37 39 9 9 0 35.7 8 242 45 -37 43 21 -37 34 58 -37 46 50 -37 31 29 0.41 50 0 0 -37 10 1 9 0 36.7 7 241 45 -37 14 13 -37 5 49 -37 17 43 -37 2 20 0.42 51 0 0 -36 40 24 9 0 37.5 6 241 45 -36 44 37 -36 36 11 -36 48 7 -36 32 41 0.43 52 0 0 -36 10 17 9 0 38.2 5 240 46 -36 14 31 -36 6 4 -36 18 2 -36 2 33 0.44 53 0 0 -35 39 43 9 0 38.9 4 239 46 -35 43 57 -35 35 28 -35 47 28 -35 31 57 0.46 54 0 0 -35 8 40 9 0 39.3 3 239 46 -35 12 55 -35 4 25 -35 16 26 -35 0 53 0.49 55 0 0 -34 37 9 9 0 39.7 2 238 47 -34 41 25 -34 32 54 -34 44 57 -34 29 22 0.54 56 0 0 -34 5 12 9 0 40.0 1 238 47 -34 9 28 -34 0 56 -34 13 1 -33 57 23 0.68 57 0 0 -33 32 48 9 0 40.1 0 237 47 -33 37 5 -33 28 31 -33 40 38 -33 24 59 2.11 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: UCAC4 315-214379 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 42 01.8731 DE: -27 06 39.163 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 42 01.8732 DE: -27 06 39.163 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (9414) Masamimurakami asteroid class: approx. diameter [km]: 12 approx. diameter ["]: 0.010 distance from Earth [AU]: 1.66630 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#47 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): 0.019", 0.002", 96.3° remarks: * orbital elements for (9414)Masamimurakami : Mean anomaly = 9.6833707611 deg Arg. of pericenter = 182.3945939377 deg Long. of node = 56.2378152632 deg Inclination = 12.1948945257 deg Eccentricity = 0.1389715852 Semimajor axis = 2.4218449081 AU Perihelion dist = 2.0852772821 AU Mag: H = 12.71, G = 0.15 Epoch of elements : MJD 60409.37086688 TDT (2024 Apr 09.3709) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472023Apr25,0.82,2024,4,9,8.900814,-0.105901,-0.319483,8.094791,-2.681314,-0.005285,-0.000332,0.000000,0.000000 -50.7218,-27.0880,46.86,7.82,False UCAC4 315-214379,18.70052027,-27.1108786,12.30,11.91,11.70,0.0,0,,18.72575222,-27.0879850,4.76,4.52,0,0,1 9414,Masamimurakami,16.66,12.430,1.6663,0,0,3.199,-14.15,,1.2,0 0,9.5864,2024,4,9,182.3946,56.2378,12.1949,0.13897,2.42184,2.08528,12.70,5.0,0.15 1.414,0.0190,0.0016,96,0.0043,Known errors,0.82,0,-1,-1 20240409_214379,60139.28 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 06:47 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org