IOTA/IOTA-ES occultation update for (926) Imhilde / TYC 7400-01224-1 event on 2024 Nov 09, 08:59 UT Visible from Summary ------- On 2024 Nov 09 UT, the 49.409 km diameter asteroid (926) Imhilde will occult a 10.4 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 5.75 mag to 16.11 mag (the magnitude of the asteroid) for at most 1.240 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 Nov 09, 08:56 - 2024 Nov 09, 09:01 * geocentric midpoint of event [JD]: 2460623.87453275 * magnitude of target star: 10.37 * magnitude drop [mag]: 5.75 * estimated maximum duration [s]: 1.240 * Moon: 52 % sunlit, 47° distance * Sun: 46° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 57 * 1 sigma uncertainty interval [path widths]: +/- 0.15 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.002", 99°) * approx speed of asteroid's shadow [km/s]: 40.0013 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7400-01224-1 by 926 Imhilde on 2024 Nov 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 - 19 0 0 -25 33 56 8 57 1.0 0 129 33 -25 53 58 -25 14 0 -25 59 52 -25 8 9 .... - 18 0 0 -26 18 40 8 57 1.0 2 129 34 -26 38 46 -25 58 40 -26 44 41 -25 52 48 0.50 - 17 0 0 -27 3 29 8 57 1.2 3 128 35 -27 23 38 -26 43 25 -27 29 35 -26 37 32 0.53 - 16 0 0 -27 48 20 8 57 1.4 4 128 36 -28 8 33 -27 28 12 -28 14 30 -27 22 18 0.55 - 15 0 0 -28 33 11 8 57 1.7 5 127 37 -28 53 28 -28 13 0 -28 59 26 -28 7 5 0.55 - 14 0 0 -29 18 1 8 57 2.1 6 127 38 -29 38 21 -28 57 47 -29 44 20 -28 51 51 0.56 - 13 0 0 -30 2 48 8 57 2.5 7 126 39 -30 23 10 -29 42 31 -30 29 11 -29 36 34 0.56 - 12 0 0 -30 47 29 8 57 3.0 8 126 39 -31 7 54 -30 27 9 -31 13 55 -30 21 12 0.56 - 11 0 0 -31 32 3 8 57 3.6 10 125 40 -31 52 30 -31 11 41 -31 58 32 -31 5 43 0.56 - 10 0 0 -32 16 27 8 57 4.2 11 125 41 -32 36 57 -31 56 3 -32 42 59 -31 50 4 0.57 - 9 0 0 -33 0 40 8 57 4.9 12 124 42 -33 21 12 -32 40 14 -33 27 14 -32 34 15 0.57 - 8 0 0 -33 44 40 8 57 5.7 13 124 43 -34 5 13 -33 24 13 -34 11 16 -33 18 13 0.57 - 7 0 0 -34 28 25 8 57 6.5 14 123 43 -34 48 59 -34 7 56 -34 55 3 -34 1 56 0.57 - 6 0 0 -35 11 53 8 57 7.4 15 122 44 -35 32 28 -34 51 23 -35 38 32 -34 45 23 0.57 - 5 0 0 -35 55 2 8 57 8.3 16 122 45 -36 15 38 -35 34 32 -36 21 42 -35 28 31 0.57 - 4 0 0 -36 37 51 8 57 9.3 17 121 45 -36 58 27 -36 17 20 -37 4 31 -36 11 20 0.57 - 3 0 0 -37 20 17 8 57 10.4 18 120 46 -37 40 54 -36 59 47 -37 46 58 -36 53 46 0.57 - 2 0 0 -38 2 21 8 57 11.5 19 120 46 -38 22 56 -37 41 50 -38 29 1 -37 35 50 0.57 - 1 0 0 -38 43 58 8 57 12.6 20 119 47 -39 4 34 -38 23 29 -39 10 38 -38 17 28 0.57 0 0 0 -39 25 10 8 57 13.8 21 118 48 -39 45 44 -39 4 41 -39 51 48 -38 58 41 0.57 1 0 0 -40 5 53 8 57 15.1 22 118 48 -40 26 26 -39 45 25 -40 32 29 -39 39 25 0.57 2 0 0 -40 46 7 8 57 16.3 23 117 48 -41 6 38 -40 25 40 -41 12 41 -40 19 41 0.57 3 0 0 -41 25 50 8 57 17.6 24 116 49 -41 46 20 -41 5 25 -41 52 22 -40 59 27 0.57 4 0 0 -42 5 1 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48 -34 22 39 0.60 180 0 0 -34 5 29 9 1 29.4 18 239 -26 -34 26 3 -33 45 0 -34 32 7 -33 39 0 0.60 -179 0 0 -33 21 33 9 1 30.5 17 239 -27 -33 42 6 -33 1 6 -33 48 9 -32 55 6 0.61 -178 0 0 -32 37 23 9 1 31.5 16 238 -28 -32 57 54 -32 16 58 -33 3 57 -32 10 59 0.61 -177 0 0 -31 53 1 9 1 32.4 14 238 -29 -32 13 30 -31 32 38 -32 19 32 -31 26 39 0.61 -176 0 0 -31 8 29 9 1 33.3 13 237 -30 -31 28 55 -30 48 7 -31 34 57 -30 42 9 0.61 -175 0 0 -30 23 48 9 1 34.1 12 236 -32 -30 44 12 -30 3 29 -30 50 13 -29 57 32 0.62 -174 0 0 -29 39 0 9 1 34.9 11 236 -33 -29 59 22 -29 18 44 -30 5 22 -29 12 48 0.62 -173 0 0 -28 54 8 9 1 35.5 10 235 -34 -29 14 27 -28 33 55 -29 20 26 -28 28 0 0.63 -172 0 0 -28 9 14 9 1 36.1 9 235 -35 -28 29 30 -27 49 4 -28 35 28 -27 43 10 0.64 -171 0 0 -27 24 20 9 1 36.7 8 234 -36 -27 44 31 -27 4 13 -27 50 28 -26 58 20 0.65 -170 0 0 -26 39 27 9 1 37.1 6 234 -37 -26 59 35 -26 19 24 -27 5 31 -26 13 31 0.66 -169 0 0 -25 54 37 9 1 37.5 5 234 -38 -26 14 41 -25 34 38 -26 20 36 -25 28 47 0.68 -168 0 0 -25 9 53 9 1 37.8 4 233 -40 -25 29 53 -24 49 58 -25 35 46 -24 44 8 0.71 -167 0 0 -24 25 16 9 1 38.1 3 233 -41 -24 45 12 -24 5 25 -24 51 4 -23 59 36 0.77 -166 0 0 -23 40 48 9 1 38.2 2 232 -42 -24 0 39 -23 21 2 -24 6 30 -23 15 14 0.89 -165 0 0 -22 56 32 9 1 38.3 1 232 -43 -23 16 18 -22 36 50 -23 22 8 -22 31 4 1.54 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 7400-01224-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 11 00.6641 DE: -34 56 30.710 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 11 00.6638 DE: -34 56 30.710 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.4 * B mag [mag]: 10.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (926) Imhilde asteroid class: approx. diameter [km]: 49 approx. diameter ["]: 0.021 distance from Earth [AU]: 3.27590 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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): 0.013", 0.002", 99.429° remarks: * orbital elements for (926)Imhilde : Mean anomaly = 48.5559264811 deg Arg. of pericenter = 173.3400211977 deg Long. of node = 48.9547127501 deg Inclination = 16.3222699618 deg Eccentricity = 0.1823898984 Semimajor axis = 2.9825863798 AU Perihelion dist = 2.4385927531 AU Mag: H = 10.54, G = 0.15 Epoch of elements : MJD 60623.37453245 TDT (2024 Nov 09.3745) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,1.24,2024,11,9,8.988786,0.015069,-0.492189,22.567221,0.693546,0.004131,-0.000733,-0.000001,0.000000 89.3015,-34.9381,41.13,-17.04,False TYC 7400-01224-1,18.18351786,-34.9418641,10.71,10.37,10.19,0.0,0,,18.21080435,-34.9381373,5.75,5.48,0,0,0 926,Imhilde,16.11,49.409,3.2759,0,0,4.927,1.87,,2.4,0 0,48.4843,2024,11,9,173.3400,48.9547,16.3223,0.18239,2.98259,2.43859,10.54,5.0,0.15 1.147,0.0130,0.0018,99,0.0031,Known errors,0.78,0,-1,-1 20241109_1224-1,60140.69 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:32 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org