IOTA/IOTA-ES occultation update for (1326) Losaka / UCAC4 481-053114 event on 2024 Aug 13, 07:29 UT Visible from Summary ------- On 2024 Aug 13 UT, the 26.1256561296002 km diameter asteroid (1326) Losaka will occult a 9.0 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.18 mag to 17.21 mag (the magnitude of the asteroid) for at most 0.830 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 Aug 13, 07:26 - 2024 Aug 13, 07:32 * geocentric midpoint of event [JD]: 2460535.81225542 * magnitude of target star: 9.03 * magnitude drop [mag]: 8.18 * estimated maximum duration [s]: 0.830 * Moon: 57 % sunlit, 46° distance * Sun: 56° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 29 * 1 sigma uncertainty interval [path widths]: +/- 0.26 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.006, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.006", 0.002", 115°) * approx speed of asteroid's shadow [km/s]: 31.7342 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 481-053114 by 1326 Losaka on 2024 Aug 13 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 35 0 0 9 27 51 7 26 34.9 0 84 56 9 19 59 9 35 43 9 15 53 9 39 48 .... 36 0 0 9 33 42 7 26 35.0 1 84 57 9 25 51 9 41 34 9 21 45 9 45 39 0.25 37 0 0 9 38 56 7 26 35.1 2 84 58 9 31 4 9 46 47 9 26 59 9 50 52 0.34 38 0 0 9 43 31 7 26 35.3 3 84 59 9 35 40 9 51 22 9 31 35 9 55 27 0.37 39 0 0 9 47 29 7 26 35.6 4 85 60 9 39 38 9 55 19 9 35 33 9 59 23 0.39 40 0 0 9 50 48 7 26 35.9 5 85 61 9 42 57 9 58 38 9 38 52 10 2 42 0.40 41 0 0 9 53 29 7 26 36.3 6 85 62 9 45 39 10 1 19 9 41 34 10 5 23 0.41 42 0 0 9 55 32 7 26 36.7 7 85 63 9 47 42 10 3 22 9 43 37 10 7 26 0.41 43 0 0 9 56 57 7 26 37.2 8 85 64 9 49 7 10 4 47 9 45 2 10 8 51 0.42 44 0 0 9 57 44 7 26 37.8 9 85 65 9 49 54 10 5 34 9 45 49 10 9 38 0.42 45 0 0 9 57 53 7 26 38.4 10 86 66 9 50 3 10 5 42 9 45 58 10 9 47 0.42 46 0 0 9 57 24 7 26 39.1 11 86 67 9 49 34 10 5 13 9 45 29 10 9 17 0.43 47 0 0 9 56 16 7 26 39.9 12 86 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0 0 -54 32 44 7 32 39.0 9 294 -29 -54 41 2 -54 24 26 -54 45 21 -54 20 8 0.45 -170 0 0 -54 45 17 7 32 39.3 9 293 -30 -54 53 33 -54 37 1 -54 57 52 -54 32 43 0.45 -169 0 0 -54 57 24 7 32 39.7 8 293 -30 -55 5 38 -54 49 10 -55 9 56 -54 44 53 0.45 -168 0 0 -55 9 5 7 32 40.0 7 292 -31 -55 17 18 -55 0 53 -55 21 35 -54 56 37 0.45 -167 0 0 -55 20 21 7 32 40.3 7 291 -31 -55 28 32 -55 12 10 -55 32 48 -55 7 55 0.45 -166 0 0 -55 31 12 7 32 40.5 6 290 -32 -55 39 22 -55 23 2 -55 43 37 -55 18 48 0.45 -165 0 0 -55 41 38 7 32 40.8 6 289 -32 -55 49 46 -55 33 30 -55 54 0 -55 29 16 0.45 -164 0 0 -55 51 39 7 32 41.0 5 288 -33 -55 59 46 -55 43 33 -56 4 0 -55 39 20 0.45 -163 0 0 -56 1 16 7 32 41.1 4 288 -33 -56 9 22 -55 53 11 -56 13 35 -55 48 59 0.45 -162 0 0 -56 10 29 7 32 41.3 4 287 -34 -56 18 33 -56 2 25 -56 22 46 -55 58 14 0.45 -161 0 0 -56 19 19 7 32 41.4 3 286 -34 -56 27 21 -56 11 16 -56 31 33 -56 7 5 0.46 -160 0 0 -56 27 44 7 32 41.6 3 285 -34 -56 35 46 -56 19 43 -56 39 57 -56 15 33 0.46 -159 0 0 -56 35 47 7 32 41.6 2 284 -35 -56 43 48 -56 27 47 -56 47 58 -56 23 37 0.47 -158 0 0 -56 43 27 7 32 41.7 2 283 -35 -56 51 26 -56 35 28 -56 55 36 -56 31 19 0.48 -157 0 0 -56 50 44 7 32 41.8 1 283 -36 -56 58 42 -56 42 46 -57 2 52 -56 38 38 0.50 -156 0 0 -56 57 39 7 32 41.8 0 282 -36 -57 5 36 -56 49 42 -57 9 45 -56 45 34 0.58 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 481-053114 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 13 16 53.9901 DE: +06 10 23.873 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 13 16 53.9898 DE: +06 10 23.874 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.0 * B mag [mag]: 9.5 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1326) Losaka asteroid class: approx. diameter [km]: 26 approx. diameter ["]: 0.010 distance from Earth [AU]: 3.71370 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 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): 0.006", 0.002", 115.154° remarks: * orbital elements for (1326)Losaka : Mean anomaly = 195.1027655087 deg Arg. of pericenter = 278.4288148464 deg Long. of node = 101.6487966640 deg Inclination = 15.9753805920 deg Eccentricity = 0.2244704942 Semimajor axis = 2.6674707744 AU Perihelion dist = 2.0687022914 AU Mag: H = 10.98, G = 0.15 Epoch of elements : MJD 60535.31225554 TDT (2024 Aug 13.3123) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,0.83,2024,8,13,7.494130,-0.222125,-0.339627,14.959837,-9.850442,0.004557,-0.001076,-0.000001,0.000001 124.8901,6.0456,68.80,14.48,False UCAC4 481-053114,13.28166395,6.1732980,9.52,9.03,8.77,0.1,0,,13.30217536,6.0456031,8.18,8.00,0,0,0 1326,Losaka,17.21,26.395,3.7137,0,0,2.375,-23.33,,2.0,0 0,195.0321,2024,8,13,278.4288,101.6488,15.9754,0.22447,2.66747,2.06870,10.97,5.0,0.15 1.260,0.0063,0.0024,115,0.0026,Known errors,1.05,0,-1,-1 20240813_053114,60140.24 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org