IOTA/IOTA-ES occultation update for (1306) Scythia / UCAC4 317-130189 event on 2024 Jun 01, 21:17 UT Visible from Summary ------- On 2024 Jun 01 UT, the 72.454 km diameter asteroid (1306) Scythia will occult a 11.9 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 2.93 mag to 14.72 mag (the magnitude of the asteroid) for at most 5.530 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 01, 21:08 - 2024 Jun 01, 21:25 * geocentric midpoint of event [JD]: 2460463.38687841 * magnitude of target star: 11.87 * magnitude drop [mag]: 2.93 * estimated maximum duration [s]: 5.530 * Moon: 26 % sunlit, 99° distance * Sun: 160° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 74 * 1 sigma uncertainty interval [path widths]: +/- 0.32 * 1 sigma uncertainty interval [seconds]: +/- 2.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.024, +/- 0.008) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.004", 74°) * approx speed of asteroid's shadow [km/s]: 13.1043 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 317-130189 by 1306 Scythia on 2024 Jun 1 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 - 28 0 0 4 10 15 21 25 5.8 0 117 -20 4 32 32 3 47 57 4 46 34 3 33 52 .... - 27 0 0 3 39 40 21 25 5.7 1 117 -21 4 1 59 3 17 19 4 16 3 3 3 12 0.20 - 26 0 0 3 8 44 21 25 5.3 3 117 -22 3 31 6 2 46 20 3 45 13 2 32 12 0.18 - 25 0 0 2 37 29 21 25 4.8 4 117 -24 2 59 54 2 15 3 3 14 2 2 0 52 0.18 - 24 0 0 2 5 56 21 25 4.1 5 117 -25 2 28 24 1 43 27 2 42 33 1 29 15 0.17 - 23 0 0 1 34 5 21 25 3.2 6 117 -26 1 56 35 1 11 33 2 10 46 0 57 19 0.17 - 22 0 0 1 1 57 21 25 2.1 7 117 -27 1 24 29 0 39 23 1 38 42 0 25 7 0.17 - 21 0 0 0 29 33 21 25 0.8 8 117 -28 0 52 8 0 6 56 1 6 22 - 0 7 21 0.16 - 20 0 0 - 0 3 7 21 24 59.3 9 117 -29 0 19 31 - 0 25 45 0 33 47 - 0 40 4 0.16 - 19 0 0 - 0 36 0 21 24 57.7 10 117 -30 - 0 13 21 - 0 58 41 0 0 57 - 1 13 1 0.16 - 18 0 0 - 1 9 7 21 24 55.8 12 117 -31 - 0 46 25 - 1 31 50 - 0 32 7 - 1 46 12 0.16 - 17 0 0 - 1 42 27 21 24 53.7 13 117 -33 - 1 19 43 - 2 5 12 - 1 5 23 - 2 19 34 0.16 - 16 0 0 - 2 15 58 21 24 51.5 14 117 -34 - 1 53 12 - 2 38 45 - 1 38 51 - 2 53 8 0.16 - 15 0 0 - 2 49 39 21 24 49.1 15 117 -35 - 2 26 52 - 3 12 28 - 2 12 30 - 3 26 53 0.16 - 14 0 0 - 3 23 31 21 24 46.4 16 117 -36 - 3 0 42 - 3 46 21 - 2 46 19 - 4 0 47 0.16 - 13 0 0 - 3 57 31 21 24 43.6 17 117 -37 - 3 34 40 - 4 20 23 - 3 20 16 - 4 34 49 0.16 - 12 0 0 - 4 31 38 21 24 40.6 18 117 -38 - 4 8 46 - 4 54 32 - 3 54 21 - 5 8 59 0.16 - 11 0 0 - 5 5 52 21 24 37.5 19 117 -39 - 4 42 59 - 5 28 47 - 4 28 33 - 5 43 16 0.16 - 10 0 0 - 5 40 12 21 24 34.1 21 116 -40 - 5 17 18 - 6 3 8 - 5 2 51 - 6 17 38 0.16 - 9 0 0 - 6 14 37 21 24 30.6 22 116 -42 - 5 51 41 - 6 37 34 - 5 37 14 - 6 52 4 0.16 - 8 0 0 - 6 49 5 21 24 26.9 23 116 -43 - 6 26 9 - 7 12 3 - 6 11 41 - 7 26 33 0.16 - 7 0 0 - 7 23 36 21 24 23.0 24 116 -44 - 7 0 39 - 7 46 34 - 6 46 10 - 8 1 5 0.16 - 6 0 0 - 7 58 8 21 24 18.9 25 116 -45 - 7 35 10 - 8 21 7 - 7 20 42 - 8 35 39 0.16 - 5 0 0 - 8 32 41 21 24 14.7 26 116 -46 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secs Prediction of 2023 Jul 14.4 Data for the target star ------------------------ * name: UCAC4 317-130189 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 05 17.7315 DE: -26 38 56.209 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 05 17.7316 DE: -26 38 56.209 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.9 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1306) Scythia asteroid class: approx. diameter [km]: 72 approx. diameter ["]: 0.041 distance from Earth [AU]: 2.43120 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#65 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): 0.025", 0.004", 74.4° remarks: * orbital elements for (1306)Scythia : Mean anomaly = 214.9512611600 deg Arg. of pericenter = 141.9085389313 deg Long. of node = 274.0361258500 deg Inclination = 14.9869881730 deg Eccentricity = 0.0968028986 Semimajor axis = 3.1441805498 AU Perihelion dist = 2.8398147590 AU Mag: H = 9.67, G = 0.15 Epoch of elements : MJD 60462.88687862 TDT (2024 Jun 01.8869) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#652023Apr24,5.53,2024,6,1,21.285082,-0.043062,-0.164908,-7.157626,1.864255,-0.001959,0.000279,0.000001,0.000000 61.5892,-26.6476,-139.78,22.21,False UCAC4 317-130189,18.08825875,-26.6489469,12.38,11.87,11.59,0.0,0,,18.11396309,-26.6475722,2.93,2.76,0,0,0 1306,Scythia,14.72,72.454,2.4312,0,0,-1.931,6.75,,3.8,0 0,214.7945,2024,6,1,141.9085,274.0361,14.9870,0.09680,3.14418,2.83981,9.67,5.0,0.15 1.316,0.0250,0.0037,74,0.0130,Known errors,0.59,0,-1,-1 20240601_130189,60139.37 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 08:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org