IOTA/IOTA-ES occultation update for (1225) Ariane / UCAC4 314-234278 event on 2024 Jun 10, 06:21 UT Visible from Summary ------- On 2024 Jun 10 UT, the 9.349 km diameter asteroid (1225) Ariane will occult a 11.8 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 3.74 mag to 15.49 mag (the magnitude of the asteroid) for at most 1.200 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 Jun 10, 06:09 - 2024 Jun 10, 06:32 * geocentric midpoint of event [JD]: 2460471.76482370 * magnitude of target star: 11.79 * magnitude drop [mag]: 3.74 * estimated maximum duration [s]: 1.200 * Moon: 16 % sunlit, 161° distance * Sun: 152° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 11 * 1 sigma uncertainty interval [path widths]: +/- 0.32 * 1 sigma uncertainty interval [seconds]: +/- 2.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.002", 81°) * approx speed of asteroid's shadow [km/s]: 7.8221 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 314-234278 by 1225 Ariane on 2024 Jun 10 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 175 0 0 -43 10 2 6 32 31.6 1 128 -18 -43 6 10 -43 13 54 -43 3 42 -43 16 22 .... 176 0 0 -43 44 48 6 32 31.3 2 127 -19 -43 40 57 -43 48 40 -43 38 29 -43 51 8 0.60 177 0 0 -44 19 8 6 32 30.7 2 127 -19 -44 15 17 -44 23 0 -44 12 49 -44 25 27 0.62 178 0 0 -44 53 1 6 32 29.8 3 126 -20 -44 49 10 -44 56 53 -44 46 43 -44 59 20 0.63 179 0 0 -45 26 27 6 32 28.8 4 125 -21 -45 22 36 -45 30 18 -45 20 9 -45 32 45 0.64 -180 0 0 -45 59 24 6 32 27.5 5 125 -22 -45 55 34 -46 3 15 -45 53 7 -46 5 42 0.64 -179 0 0 -46 31 53 6 32 26.0 6 124 -23 -46 28 3 -46 35 43 -46 25 37 -46 38 10 0.65 -178 0 0 -47 3 53 6 32 24.3 7 123 -23 -47 0 3 -47 7 42 -46 57 37 -47 10 9 0.65 -177 0 0 -47 35 22 6 32 22.3 8 122 -24 -47 31 33 -47 39 12 -47 29 7 -47 41 38 0.65 -176 0 0 -48 6 22 6 32 20.2 9 122 -25 -48 2 34 -48 10 11 -48 0 8 -48 12 37 0.65 -175 0 0 -48 36 51 6 32 18.0 9 121 -26 -48 33 3 -48 40 39 -48 30 38 -48 43 5 0.65 -174 0 0 -49 6 50 6 32 15.5 10 120 -26 -49 3 2 -49 10 37 -49 0 37 -49 13 3 0.65 -173 0 0 -49 36 17 6 32 12.9 11 119 -27 -49 32 30 -49 40 4 -49 30 6 -49 42 29 0.66 -172 0 0 -50 5 13 6 32 10.1 12 119 -28 -50 1 27 -50 9 0 -49 59 3 -50 11 24 0.66 -171 0 0 -50 33 38 6 32 7.2 13 118 -28 -50 29 52 -50 37 24 -50 27 29 -50 39 48 0.66 -170 0 0 -51 1 31 6 32 4.1 13 117 -29 -50 57 46 -51 5 16 -50 55 23 -51 7 40 0.66 -169 0 0 -51 28 53 6 32 1.0 14 116 -30 -51 25 9 -51 32 37 -51 22 46 -51 35 1 0.66 -168 0 0 -51 55 43 6 31 57.6 15 115 -30 -51 52 0 -51 59 27 -51 49 37 -52 1 50 0.66 -167 0 0 -52 22 2 6 31 54.2 16 115 -31 -52 18 19 -52 25 45 -52 15 57 -52 28 7 0.66 -166 0 0 -52 47 49 6 31 50.7 16 114 -31 -52 44 7 -52 51 31 -52 41 45 -52 53 53 0.66 -165 0 0 -53 13 5 6 31 47.0 17 113 -32 -53 9 23 -53 16 46 -53 7 2 -53 19 8 0.66 -164 0 0 -53 37 49 6 31 43.3 18 112 -32 -53 34 8 -53 41 30 -53 31 48 -53 43 51 0.66 -163 0 0 -54 2 2 6 31 39.5 18 111 -33 -53 58 22 -54 5 42 -53 56 2 -54 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11 1.4 19 248 8 -27 14 28 -27 21 49 -27 12 7 -27 24 10 0.68 21 0 0 -26 41 19 6 10 55.6 18 248 9 -26 37 40 -26 44 59 -26 35 19 -26 47 20 0.68 22 0 0 -26 4 40 6 10 50.2 17 247 10 -26 1 1 -26 8 19 -25 58 41 -26 10 39 0.69 23 0 0 -25 28 11 6 10 45.1 15 247 11 -25 24 33 -25 31 49 -25 22 13 -25 34 9 0.69 24 0 0 -24 51 54 6 10 40.3 14 246 12 -24 48 17 -24 55 32 -24 45 58 -24 57 51 0.69 25 0 0 -24 15 51 6 10 35.8 13 246 13 -24 12 14 -24 19 28 -24 9 56 -24 21 46 0.69 26 0 0 -23 40 2 6 10 31.6 12 245 14 -23 36 25 -23 43 38 -23 34 8 -23 45 56 0.70 27 0 0 -23 4 28 6 10 27.8 11 245 16 -23 0 53 -23 8 3 -22 58 35 -23 10 21 0.70 28 0 0 -22 29 11 6 10 24.3 10 245 17 -22 25 37 -22 32 46 -22 23 20 -22 35 3 0.71 29 0 0 -21 54 12 6 10 21.2 9 244 18 -21 50 38 -21 57 46 -21 48 22 -22 0 3 0.71 30 0 0 -21 19 32 6 10 18.4 8 244 19 -21 15 59 -21 23 5 -21 13 43 -21 25 22 0.72 31 0 0 -20 45 12 6 10 15.9 7 243 20 -20 41 40 -20 48 45 -20 39 25 -20 51 0 0.73 32 0 0 -20 11 14 6 10 13.8 6 243 21 -20 7 42 -20 14 45 -20 5 28 -20 17 1 0.75 33 0 0 -19 37 37 6 10 12.0 5 243 22 -19 34 7 -19 41 8 -19 31 52 -19 43 23 0.77 34 0 0 -19 4 24 6 10 10.6 4 242 23 -19 0 54 -19 7 54 -18 58 40 -19 10 8 0.80 35 0 0 -18 31 35 6 10 9.6 3 242 24 -18 28 6 -18 35 4 -18 25 53 -18 37 18 0.86 36 0 0 -17 59 11 6 10 8.9 2 242 25 -17 55 43 -18 2 40 -17 53 30 -18 4 53 1.02 37 0 0 -17 27 14 6 10 8.6 0 241 26 -17 23 46 -17 30 41 -17 21 34 -17 32 54 1.98 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 14.4 Data for the target star ------------------------ * name: UCAC4 314-234278 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 17 52.6123 DE: -27 19 50.826 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 17 52.6123 DE: -27 19 50.826 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1225) Ariane asteroid class: approx. diameter [km]: 9 approx. diameter ["]: 0.009 distance from Earth [AU]: 1.44620 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 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): 0.017", 0.002", 80.9° remarks: * orbital elements for (1225)Ariane : Mean anomaly = 159.4273949371 deg Arg. of pericenter = 101.3786432197 deg Long. of node = 12.3248964447 deg Inclination = 3.0739841098 deg Eccentricity = 0.0741411370 Semimajor axis = 2.2333628486 AU Perihelion dist = 2.0677787876 AU Mag: H = 12.09, G = 0.15 Epoch of elements : MJD 60471.26482446 TDT (2024 Jun 10.2648) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr24,1.20,2024,6,10,6.355769,0.147176,-0.546069,-4.262994,-1.148571,-0.002537,0.000077,0.000001,0.000000 -64.5852,-27.2864,84.55,23.05,False UCAC4 314-234278,19.29794785,-27.3307850,12.53,11.79,11.39,0.0,0,,19.32355059,-27.2864260,3.74,3.69,0,0,0 1225,Ariane,15.49,9.349,1.4462,0,0,-1.945,-6.99,,0.8,0 0,159.3492,2024,6,10,101.3786,12.3249,3.0740,0.07414,2.23336,2.06778,12.09,5.0,0.15 1.319,0.0167,0.0023,81,0.0029,Known errors,1.13,0,-1,-1 20240610_234278,60139.38 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 09:03 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org