IOTA/IOTA-ES occultation update for (43) Ariadne / UCAC4 346-132809 event on 2024 Oct 06, 01:01 UT Visible from Summary ------- On 2024 Oct 06 UT, the 60.8231582385409 km diameter asteroid (43) Ariadne will occult a 10.1 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 2.00 mag to 11.87 mag (the magnitude of the asteroid) for at most 2.350 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 Oct 06, 00:57 - 2024 Oct 06, 01:05 * geocentric midpoint of event [JD]: 2460589.54267829 * magnitude of target star: 10.06 * magnitude drop [mag]: 2.00 * estimated maximum duration [s]: 2.350 * Moon: 9 % sunlit, 46° distance * Sun: 81° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 61 * 1 sigma uncertainty interval [path widths]: +/- 0.04 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.024, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.024", 0.001", 84°) * approx speed of asteroid's shadow [km/s]: 25.9315 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 346-132809 by 43 Ariadne on 2024 Oct 6 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 156 0 0 .. .. .... .. .. .. .. .. .. 3 15 40 .. .. .. 3 14 10 .. .. .. .... 157 0 0 3 10 22 0 57 23.0 1 111 80 2 52 34 3 28 10 2 51 4 3 29 41 .... 158 0 0 2 47 19 0 57 23.1 2 111 81 2 29 32 3 5 7 2 28 1 3 6 38 -0.02 159 0 0 2 24 21 0 57 23.3 3 111 82 2 6 34 2 42 8 2 5 3 2 43 39 -0.05 160 0 0 2 1 26 0 57 23.6 4 111 82 1 43 40 2 19 13 1 42 10 2 20 44 -0.06 161 0 0 1 38 37 0 57 24.0 5 111 83 1 20 52 1 56 24 1 19 21 1 57 54 -0.07 162 0 0 1 15 54 0 57 24.4 6 111 83 0 58 9 1 33 40 0 56 38 1 35 10 -0.07 163 0 0 0 53 17 0 57 25.0 7 111 84 0 35 32 1 11 2 0 34 2 1 12 32 -0.08 164 0 0 0 30 46 0 57 25.6 9 111 84 0 13 3 0 48 31 0 11 32 0 50 1 -0.08 165 0 0 0 8 23 0 57 26.4 10 111 84 - 0 9 20 0 26 7 - 0 10 50 0 27 37 -0.08 166 0 0 - 0 13 52 0 57 27.2 11 111 84 - 0 31 35 0 3 51 - 0 33 5 0 5 21 -0.09 167 0 0 - 0 35 59 0 57 28.1 12 111 84 - 0 53 41 - 0 18 17 - 0 55 11 - 0 16 47 -0.09 168 0 0 - 0 57 58 0 57 29.1 13 111 83 - 1 15 38 - 0 40 16 - 1 17 9 - 0 38 46 -0.09 169 0 0 - 1 19 47 0 57 30.1 14 111 83 - 1 37 27 - 1 2 6 - 1 38 57 - 1 0 36 -0.09 170 0 0 - 1 41 26 0 57 31.3 15 111 82 - 1 59 5 - 1 23 47 - 2 0 35 - 1 22 17 -0.09 171 0 0 - 2 2 55 0 57 32.5 16 111 81 - 2 20 33 - 1 45 17 - 2 22 3 - 1 43 47 -0.09 172 0 0 - 2 24 13 0 57 33.8 17 111 80 - 2 41 50 - 2 6 36 - 2 43 20 - 2 5 6 -0.09 173 0 0 - 2 45 20 0 57 35.2 18 111 79 - 3 2 56 - 2 27 44 - 3 4 26 - 2 26 14 -0.09 174 0 0 - 3 6 16 0 57 36.7 19 111 78 - 3 23 51 - 2 48 40 - 3 25 20 - 2 47 11 -0.10 175 0 0 - 3 26 59 0 57 38.2 20 111 78 - 3 44 33 - 3 9 25 - 3 46 2 - 3 7 55 -0.10 176 0 0 - 3 47 30 0 57 39.8 21 111 77 - 4 5 3 - 3 29 56 - 4 6 32 - 3 28 27 -0.10 177 0 0 - 4 7 47 0 57 41.5 22 111 76 - 4 25 19 - 3 50 15 - 4 26 48 - 3 48 46 -0.10 178 0 0 - 4 27 52 0 57 43.3 23 111 75 - 4 45 22 - 4 10 21 - 4 46 51 - 4 8 51 -0.10 179 0 0 - 4 47 42 0 57 45.2 24 111 74 - 5 5 12 - 4 30 12 - 5 6 41 - 4 28 43 -0.10 -180 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18 19 -0.11 - 95 0 0 -12 26 15 1 2 57.5 68 245 -12 -12 43 8 -12 9 22 -12 44 34 -12 7 56 -0.11 - 94 0 0 -12 15 31 1 3 1.5 67 245 -13 -12 32 25 -11 58 37 -12 33 52 -11 57 11 -0.11 - 93 0 0 -12 4 26 1 3 5.5 66 245 -14 -12 21 21 -11 47 31 -12 22 47 -11 46 4 -0.11 - 92 0 0 -11 53 0 1 3 9.5 65 246 -15 -12 9 56 -11 36 3 -12 11 22 -11 34 36 -0.11 - 91 0 0 -11 41 12 1 3 13.4 64 246 -16 -11 58 9 -11 24 14 -11 59 35 -11 22 47 -0.11 - 90 0 0 -11 29 3 1 3 17.3 63 246 -17 -11 46 1 -11 12 4 -11 47 28 -11 10 37 -0.11 - 89 0 0 -11 16 33 1 3 21.2 62 246 -18 -11 33 32 -10 59 32 -11 34 59 -10 58 6 -0.11 - 88 0 0 -11 3 42 1 3 25.1 61 247 -19 -11 20 43 -10 46 40 -11 22 10 -10 45 14 -0.11 - 87 0 0 -10 50 31 1 3 28.9 60 247 -20 -11 7 33 -10 33 28 -11 8 59 -10 32 1 -0.11 - 86 0 0 -10 36 59 1 3 32.7 59 247 -21 -10 54 2 -10 19 55 -10 55 29 -10 18 28 -0.11 - 85 0 0 -10 23 6 1 3 36.5 58 247 -22 -10 40 11 -10 6 1 -10 41 38 -10 4 34 -0.11 - 84 0 0 -10 8 54 1 3 40.2 57 247 -23 -10 26 0 - 9 51 48 -10 27 27 - 9 50 20 -0.11 - 83 0 0 - 9 54 22 1 3 43.9 56 247 -24 -10 11 29 - 9 37 14 -10 12 56 - 9 35 47 -0.11 - 82 0 0 - 9 39 30 1 3 47.5 55 247 -25 - 9 56 38 - 9 22 21 - 9 58 6 - 9 20 54 -0.11 - 81 0 0 - 9 24 19 1 3 51.1 54 247 -26 - 9 41 28 - 9 7 8 - 9 42 56 - 9 5 41 -0.11 - 80 0 0 - 9 8 48 1 3 54.7 53 247 -27 - 9 25 59 - 8 51 36 - 9 27 27 - 8 50 9 -0.11 - 79 0 0 - 8 52 58 1 3 58.2 51 247 -29 - 9 10 11 - 8 35 45 - 9 11 38 - 8 34 18 -0.11 - 78 0 0 - 8 36 50 1 4 1.7 50 247 -30 - 8 54 3 - 8 19 36 - 8 55 31 - 8 18 8 -0.11 - 77 0 0 - 8 20 23 1 4 5.1 49 247 -31 - 8 37 38 - 8 3 7 - 8 39 6 - 8 1 39 -0.11 - 76 0 0 - 8 3 37 1 4 8.5 48 247 -32 - 8 20 54 - 7 46 21 - 8 22 22 - 7 44 52 -0.11 - 75 0 0 - 7 46 34 1 4 11.9 47 247 -33 - 8 3 52 - 7 29 16 - 8 5 20 - 7 27 48 -0.11 - 74 0 0 - 7 29 13 1 4 15.2 46 247 -34 - 7 46 32 - 7 11 54 - 7 48 0 - 7 10 25 -0.11 - 73 0 0 - 7 11 35 1 4 18.4 45 247 -35 - 7 28 55 - 6 54 14 - 7 30 23 - 6 52 46 -0.11 - 72 0 0 - 6 53 39 1 4 21.6 44 247 -36 - 7 11 1 - 6 36 17 - 7 12 29 - 6 34 49 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20 -0.10 - 59 0 0 - 2 37 22 1 4 57.6 31 247 -49 - 2 54 58 - 2 19 44 - 2 56 28 - 2 18 14 -0.10 - 58 0 0 - 2 16 5 1 4 59.9 29 247 -51 - 2 33 43 - 1 58 27 - 2 35 13 - 1 56 57 -0.10 - 57 0 0 - 1 54 38 1 5 2.2 28 247 -52 - 2 12 17 - 1 36 58 - 2 13 46 - 1 35 28 -0.10 - 56 0 0 - 1 32 59 1 5 4.3 27 247 -53 - 1 50 39 - 1 15 19 - 1 52 9 - 1 13 49 -0.10 - 55 0 0 - 1 11 11 1 5 6.4 26 247 -54 - 1 28 52 - 0 53 30 - 1 30 22 - 0 51 59 -0.10 - 54 0 0 - 0 49 13 1 5 8.4 25 247 -55 - 1 6 54 - 0 31 31 - 1 8 25 - 0 30 0 -0.10 - 53 0 0 - 0 27 5 1 5 10.3 24 247 -56 - 0 44 48 - 0 9 22 - 0 46 18 - 0 7 52 -0.10 - 52 0 0 - 0 4 49 1 5 12.2 23 247 -57 - 0 22 33 0 12 54 - 0 24 3 0 14 25 -0.10 - 51 0 0 0 17 35 1 5 14.0 22 247 -58 - 0 0 9 0 35 19 - 0 1 40 0 36 50 -0.10 - 50 0 0 0 40 7 1 5 15.7 21 247 -59 0 22 22 0 57 52 0 20 52 0 59 23 -0.10 - 49 0 0 1 2 46 1 5 17.3 20 247 -60 0 45 0 1 20 32 0 43 30 1 22 2 -0.10 - 48 0 0 1 25 31 1 5 18.8 19 247 -61 1 7 45 1 43 18 1 6 15 1 44 49 -0.10 - 47 0 0 1 48 23 1 5 20.3 18 247 -62 1 30 36 2 6 10 1 29 6 2 7 41 -0.10 - 46 0 0 2 11 20 1 5 21.6 17 247 -63 1 53 33 2 29 8 1 52 2 2 30 39 -0.10 - 45 0 0 2 34 22 1 5 22.9 16 247 -64 2 16 35 2 52 10 2 15 4 2 53 41 -0.10 - 44 0 0 2 57 29 1 5 24.1 14 247 -65 2 39 41 3 15 17 2 38 10 3 16 48 -0.10 - 43 0 0 3 20 39 1 5 25.2 13 248 -66 3 2 50 3 38 28 3 1 20 3 39 59 -0.10 - 42 0 0 3 43 52 1 5 26.2 12 248 -67 3 26 4 4 1 42 3 24 33 4 3 13 -0.10 - 41 0 0 4 7 9 1 5 27.2 11 248 -68 3 49 20 4 24 58 3 47 49 4 26 29 -0.10 - 40 0 0 4 30 27 1 5 28.0 10 248 -69 4 12 38 4 48 17 4 11 7 4 49 48 -0.10 - 39 0 0 4 53 47 1 5 28.8 9 248 -70 4 35 58 5 11 37 4 34 27 5 13 8 -0.09 - 38 0 0 5 17 8 1 5 29.5 8 248 -71 4 59 19 5 34 59 4 57 48 5 36 30 -0.09 - 37 0 0 5 40 30 1 5 30.1 7 248 -72 5 22 40 5 58 20 5 21 9 5 59 51 -0.09 - 36 0 0 6 3 51 1 5 30.6 6 248 -73 5 46 1 6 21 42 5 44 31 6 23 13 -0.09 - 35 0 0 6 27 12 1 5 31.0 5 248 -74 6 9 22 6 45 2 6 7 51 6 46 33 -0.09 - 34 0 0 6 50 32 1 5 31.4 4 248 -75 6 32 42 7 8 22 6 31 11 7 9 53 -0.08 - 33 0 0 7 13 49 1 5 31.6 3 248 -76 6 56 0 7 31 40 6 54 29 7 33 11 -0.07 - 32 0 0 7 37 5 1 5 31.8 2 249 -77 7 19 15 7 54 55 7 17 44 7 56 26 -0.06 - 31 0 0 8 0 17 1 5 31.9 1 249 -78 7 42 28 8 18 7 7 40 57 8 19 38 0.04 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 346-132809 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 15 24.6720 DE: -20 57 12.250 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 15 24.6719 DE: -20 57 12.250 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.1 * B mag [mag]: 10.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (43) Ariadne asteroid class: approx. diameter [km]: 61 approx. diameter ["]: 0.048 distance from Earth [AU]: 1.73510 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#134 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): 0.024", 0.001", 83.953° remarks: * orbital elements for (43)Ariadne : Mean anomaly = 17.6274974157 deg Arg. of pericenter = 16.1282989976 deg Long. of node = 264.7469617185 deg Inclination = 3.4706858600 deg Eccentricity = 0.1684785652 Semimajor axis = 2.2031494273 AU Perihelion dist = 1.8319659728 AU Mag: H = 7.98, G = 0.11 Epoch of elements : MJD 60589.04267825 TDT (2024 Oct 06.0427) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1342023Apr24,2.35,2024,10,6,1.024279,-0.004774,0.108718,14.622753,0.632927,0.005038,0.000185,0.000000,0.000000 -116.3329,-20.9462,161.66,-5.24,False UCAC4 346-132809,18.25685339,-20.9534026,10.88,10.06,9.62,0.1,0,,18.28139023,-20.9461550,2.00,1.99,0,0,0 43,Ariadne,11.87,60.949,1.7351,0,0,5.291,3.22,,3.6,0 0,17.3132,2024,10,5,16.1283,264.7470,3.4707,0.16848,2.20315,1.83197,7.97,5.0,0.15 1.042,0.0243,0.0014,84,0.0021,Known errors,0.84,0,-1,-1 20241006_132809,60140.61 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:43 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org