IOTA/IOTA-ES occultation update for (148) Gallia / TYC 243-00026-1 event on 2024 Oct 17, 03:53 UT Visible from Summary ------- On 2024 Oct 17 UT, the 91.976 km diameter asteroid (148) Gallia will occult a 10.7 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.61 mag to 13.21 mag (the magnitude of the asteroid) for at most 2.880 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 17, 03:50 - 2024 Oct 17, 03:56 * geocentric midpoint of event [JD]: 2460600.66219508 * magnitude of target star: 10.70 * magnitude drop [mag]: 2.61 * estimated maximum duration [s]: 2.880 * Moon: 100 % sunlit, 131° distance * Sun: 54° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 96 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 0.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.006, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.006", 0.002", 87°) * approx speed of asteroid's shadow [km/s]: 31.9152 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 243-00026-1 by 148 Gallia on 2024 Oct 17 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 - 22 0 0 - 6 21 27 3 50 22.1 1 83 -48 - 6 47 40 - 5 55 18 - 6 50 29 - 5 52 29 .... - 21 0 0 - 6 14 37 3 50 22.2 2 83 -47 - 6 40 49 - 5 48 28 - 6 43 38 - 5 45 40 0.18 - 20 0 0 - 6 7 58 3 50 22.3 3 83 -46 - 6 34 10 - 5 41 50 - 6 36 59 - 5 39 2 0.22 - 19 0 0 - 6 1 31 3 50 22.5 4 83 -45 - 6 27 42 - 5 35 23 - 6 30 31 - 5 32 35 0.24 - 18 0 0 - 5 55 16 3 50 22.8 5 83 -44 - 6 21 27 - 5 29 9 - 6 24 16 - 5 26 21 0.25 - 17 0 0 - 5 49 14 3 50 23.1 6 83 -43 - 6 15 24 - 5 23 7 - 6 18 13 - 5 20 19 0.26 - 16 0 0 - 5 43 23 3 50 23.5 7 83 -42 - 6 9 33 - 5 17 17 - 6 12 22 - 5 14 29 0.27 - 15 0 0 - 5 37 46 3 50 23.9 8 82 -42 - 6 3 55 - 5 11 40 - 6 6 43 - 5 8 52 0.27 - 14 0 0 - 5 32 20 3 50 24.5 9 82 -41 - 5 58 29 - 5 6 15 - 6 1 17 - 5 3 27 0.27 - 13 0 0 - 5 27 7 3 50 25.0 10 82 -40 - 5 53 15 - 5 1 2 - 5 56 4 - 4 58 14 0.28 - 12 0 0 - 5 22 7 3 50 25.7 11 82 -39 - 5 48 15 - 4 56 3 - 5 51 3 - 4 53 15 0.28 - 11 0 0 - 5 17 19 3 50 26.4 12 82 -38 - 5 43 27 - 4 51 15 - 5 46 15 - 4 48 28 0.28 - 10 0 0 - 5 12 45 3 50 27.2 13 82 -37 - 5 38 52 - 4 46 41 - 5 41 40 - 4 43 54 0.28 - 9 0 0 - 5 8 23 3 50 28.0 14 82 -36 - 5 34 30 - 4 42 20 - 5 37 18 - 4 39 33 0.28 - 8 0 0 - 5 4 15 3 50 28.9 15 82 -35 - 5 30 21 - 4 38 12 - 5 33 10 - 4 35 24 0.28 - 7 0 0 - 5 0 19 3 50 29.9 16 82 -34 - 5 26 25 - 4 34 17 - 5 29 14 - 4 31 29 0.28 - 6 0 0 - 4 56 37 3 50 30.9 17 82 -33 - 5 22 43 - 4 30 35 - 5 25 31 - 4 27 48 0.28 - 5 0 0 - 4 53 8 3 50 31.9 18 81 -32 - 5 19 14 - 4 27 7 - 5 22 2 - 4 24 19 0.29 - 4 0 0 - 4 49 53 3 50 33.1 19 81 -31 - 5 15 58 - 4 23 51 - 5 18 46 - 4 21 4 0.29 - 3 0 0 - 4 46 51 3 50 34.3 20 81 -30 - 5 12 56 - 4 20 50 - 5 15 44 - 4 18 2 0.29 - 2 0 0 - 4 44 2 3 50 35.5 21 81 -29 - 5 10 7 - 4 18 1 - 5 12 55 - 4 15 14 0.29 - 1 0 0 - 4 41 27 3 50 36.9 22 81 -28 - 5 7 32 - 4 15 26 - 5 10 20 - 4 12 39 0.29 0 0 0 - 4 39 6 3 50 38.2 23 81 -27 - 5 5 10 - 4 13 5 - 5 7 58 - 4 10 18 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0.35 151 0 0 -26 23 34 3 56 45.2 1 278 54 -26 49 48 -25 57 23 -26 52 37 -25 54 35 0.44 Uncertainty in time = +/- 0 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 243-00026-1 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 59 51.0541 DE: +06 47 41.131 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 59 51.0543 DE: +06 47 41.130 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.7 * B mag [mag]: 10.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (148) Gallia asteroid class: approx. diameter [km]: 92 approx. diameter ["]: 0.040 distance from Earth [AU]: 3.15770 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#70 date of fit: 2023 Feb 09 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): 0.006", 0.002", 86.708° remarks: * orbital elements for (148)Gallia : Mean anomaly = 71.8782885253 deg Arg. of pericenter = 252.4306150549 deg Long. of node = 144.9561498674 deg Inclination = 25.2904634361 deg Eccentricity = 0.1881607861 Semimajor axis = 2.7700191255 AU Perihelion dist = 2.2488101493 AU Mag: H = 7.65, G = 0.15 Epoch of elements : MJD 60600.16219505 TDT (2024 Oct 17.1622) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#702023Feb09,2.88,2024,10,17,3.892682,-0.049570,-0.279117,17.738606,-3.136815,-0.004463,0.001332,-0.000001,0.000000 65.7454,6.6782,117.94,-9.41,False TYC 243-00026-1,9.99751500,6.7947588,10.94,10.70,10.57,0.0,0,,10.01900539,6.6781938,2.62,2.33,0,0,0 148,Gallia,13.21,91.976,3.1577,0,0,3.316,-8.74,,5.2,0 0,71.8436,2024,10,17,252.4306,144.9561,25.2905,0.18816,2.77002,2.24881,7.64,5.0,0.15 1.054,0.0060,0.0017,87,0.0022,Known errors,0.98,0,-1,-1 20241017_0026-1,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:21 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org