IOTA/IOTA-ES occultation update for (214) Aschera / UCAC4 342-072927 event on 2024 Sep 04, 22:23 UT Visible from Summary ------- On 2024 Sep 04 UT, the 24.692 km diameter asteroid (214) Aschera will occult a 11.7 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 3.08 mag to 14.71 mag (the magnitude of the asteroid) for at most 0.900 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 Sep 04, 22:19 - 2024 Sep 04, 22:27 * geocentric midpoint of event [JD]: 2460558.43317263 * magnitude of target star: 11.70 * magnitude drop [mag]: 3.08 * estimated maximum duration [s]: 0.900 * Moon: 3 % sunlit, 51° distance * Sun: 70° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.09 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.001", 106°) * approx speed of asteroid's shadow [km/s]: 27.3089 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 342-072927 by 214 Aschera on 2024 Sep 4 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 -171 0 0 17 58 26 22 19 54.7 1 113 71 17 51 6 18 5 46 17 49 48 18 7 4 .... -170 0 0 17 33 47 22 19 54.8 2 114 72 17 26 27 17 41 8 17 25 9 17 42 26 -0.02 -169 0 0 17 8 53 22 19 55.0 3 114 73 17 1 32 17 16 14 17 0 14 17 17 32 -0.06 -168 0 0 16 43 43 22 19 55.3 4 114 74 16 36 21 16 51 5 16 35 3 16 52 23 -0.07 -167 0 0 16 18 19 22 19 55.6 5 114 75 16 10 56 16 25 41 16 9 38 16 26 59 -0.08 -166 0 0 15 52 40 22 19 56.0 6 115 76 15 45 17 16 0 3 15 43 59 16 1 21 -0.09 -165 0 0 15 26 48 22 19 56.5 7 115 77 15 19 25 15 34 11 15 18 6 15 35 30 -0.10 -164 0 0 15 0 43 22 19 57.1 8 115 78 14 53 19 15 8 6 14 52 0 15 9 25 -0.10 -163 0 0 14 34 25 22 19 57.8 9 115 79 14 27 0 14 41 49 14 25 42 14 43 7 -0.10 -162 0 0 14 7 55 22 19 58.5 10 116 80 14 0 30 14 15 20 13 59 12 14 16 38 -0.10 -161 0 0 13 41 14 22 19 59.4 11 116 81 13 33 49 13 48 39 13 32 30 13 49 57 -0.11 -160 0 0 13 14 22 22 20 0.3 13 116 82 13 6 56 13 21 47 13 5 38 13 23 6 -0.11 -159 0 0 12 47 19 22 20 1.3 14 116 83 12 39 54 12 54 45 12 38 35 12 56 4 -0.11 -158 0 0 12 20 8 22 20 2.4 15 117 84 12 12 42 12 27 34 12 11 23 12 28 53 -0.11 -157 0 0 11 52 47 22 20 3.5 16 117 85 11 45 21 12 0 14 11 44 2 12 1 33 -0.11 -156 0 0 11 25 19 22 20 4.8 17 117 85 11 17 52 11 32 45 11 16 33 11 34 4 -0.11 -155 0 0 10 57 42 22 20 6.1 18 117 86 10 50 16 11 5 9 10 48 57 11 6 28 -0.11 -154 0 0 10 29 59 22 20 7.5 19 118 86 10 22 32 10 37 27 10 21 14 10 38 45 -0.11 -153 0 0 10 2 10 22 20 9.0 20 118 86 9 54 43 10 9 38 9 53 24 10 10 57 -0.11 -152 0 0 9 34 16 22 20 10.6 21 118 86 9 26 49 9 41 43 9 25 30 9 43 2 -0.11 -151 0 0 9 6 17 22 20 12.3 22 118 85 8 58 49 9 13 44 8 57 30 9 15 3 -0.11 -150 0 0 8 38 14 22 20 14.0 23 118 84 8 30 46 8 45 41 8 29 27 8 47 0 -0.12 -149 0 0 8 10 7 22 20 15.9 25 118 83 8 2 40 8 17 35 8 1 21 8 18 54 -0.12 -148 0 0 7 41 59 22 20 17.8 26 119 83 7 34 31 7 49 26 7 33 12 7 50 45 -0.12 -147 0 0 7 13 48 22 20 19.8 27 119 82 7 6 21 7 21 16 7 5 2 7 22 35 -0.12 -146 0 0 6 45 37 22 20 21.9 28 119 81 6 38 10 6 53 5 6 36 51 6 54 24 -0.12 -145 0 0 6 17 26 22 20 24.0 29 119 80 6 9 58 6 24 53 6 8 39 6 26 12 -0.12 -144 0 0 5 49 15 22 20 26.3 30 119 79 5 41 47 5 56 42 5 40 28 5 58 1 -0.12 -143 0 0 5 21 5 22 20 28.6 31 119 78 5 13 38 5 28 32 5 12 19 5 29 51 -0.12 -142 0 0 4 52 58 22 20 31.0 32 120 76 4 45 31 5 0 25 4 44 12 5 1 44 -0.12 -141 0 0 4 24 53 22 20 33.4 33 120 75 4 17 27 4 32 20 4 16 8 4 33 39 -0.12 -140 0 0 3 56 52 22 20 36.0 34 120 74 3 49 26 4 4 19 3 48 7 4 5 38 -0.12 -139 0 0 3 28 56 22 20 38.6 36 120 73 3 21 30 3 36 22 3 20 11 3 37 41 -0.12 -138 0 0 3 1 5 22 20 41.3 37 120 72 2 53 39 3 8 31 2 52 20 3 9 50 -0.12 -137 0 0 2 33 19 22 20 44.1 38 120 71 2 25 54 2 40 45 2 24 35 2 42 4 -0.12 -136 0 0 2 5 41 22 20 46.9 39 120 70 1 58 15 2 13 6 1 56 57 2 14 25 -0.12 -135 0 0 1 38 9 22 20 49.8 40 120 69 1 30 44 1 45 34 1 29 26 1 46 53 -0.12 -134 0 0 1 10 46 22 20 52.7 41 121 68 1 3 22 1 18 11 1 2 3 1 19 29 -0.12 -133 0 0 0 43 32 22 20 55.8 42 121 67 0 36 8 0 50 56 0 34 49 0 52 15 -0.12 -132 0 0 0 16 27 22 20 58.9 43 121 66 0 9 3 0 23 51 0 7 45 0 25 9 -0.12 -131 0 0 - 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4 29 11 0.02 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.5 Data for the target star ------------------------ * name: UCAC4 342-072927 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 18 49.3441 DE: -21 38 57.753 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 18 49.3440 DE: -21 38 57.753 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.7 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (214) Aschera asteroid class: approx. diameter [km]: 25 approx. diameter ["]: 0.012 distance from Earth [AU]: 2.82950 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#58 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", 105.711° remarks: * orbital elements for (214)Aschera : Mean anomaly = 132.9151014339 deg Arg. of pericenter = 136.5405725294 deg Long. of node = 341.9142987138 deg Inclination = 3.4364502418 deg Eccentricity = 0.0308031263 Semimajor axis = 2.6116542932 AU Perihelion dist = 2.5312071762 AU Mag: H = 9.30, G = 0.51 Epoch of elements : MJD 60557.93317258 TDT (2024 Sep 04.9332) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Apr24,0.90,2024,9,4,22.396143,0.027040,0.126741,15.064289,-3.264320,0.005102,-0.001461,-0.000001,0.000000 -90.4088,-21.7396,-156.26,6.73,False UCAC4 342-072927,15.31370672,-21.6493759,12.39,11.70,11.33,0.0,0,,15.33735170,-21.7396021,3.07,3.00,0,0,0 214,Aschera,14.71,24.692,2.8295,0,0,3.360,-10.14,,1.2,0 0,132.6972,2024,9,4,136.5406,341.9143,3.4365,0.03080,2.61165,2.53121,9.29,5.0,0.15 1.088,0.0080,0.0009,106,0.0011,Known errors,1.11,0,-1,-1 20240904_072927,60140.54 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 12:59 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org