IOTA/IOTA-ES occultation update for (134) Sophrosyne / UCAC4 246-138801 event on 2024 Jun 21, 11:49 UT Visible from Summary ------- On 2024 Jun 21 UT, the 104.934 km diameter asteroid (134) Sophrosyne will occult a 11.7 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.53 mag to 12.91 mag (the magnitude of the asteroid) for at most 8.290 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 Jun 21, 11:41 - 2024 Jun 21, 11:58 * geocentric midpoint of event [JD]: 2460482.99291775 * magnitude of target star: 11.68 * magnitude drop [mag]: 1.53 * estimated maximum duration [s]: 8.290 * Moon: 99 % sunlit, 14° distance * Sun: 162° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 108 * 1 sigma uncertainty interval [path widths]: +/- 0.07 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.005", 101°) * approx speed of asteroid's shadow [km/s]: 12.6639 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 246-138801 by 134 Sophrosyne on 2024 Jun 21 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 100 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 13 42 23 .... 101 0 0 13 34 10 11 57 57.9 1 133 -4 14 14 7 12 54 23 14 19 42 12 48 50 .... 102 0 0 12 40 33 11 57 57.6 2 133 -5 13 20 25 12 0 50 13 26 0 11 55 18 -0.09 103 0 0 11 46 59 11 57 57.1 3 133 -6 12 26 46 11 7 22 12 32 21 11 1 50 -0.15 104 0 0 10 53 31 11 57 56.2 5 133 -7 11 33 12 10 13 59 11 38 46 10 8 29 -0.18 105 0 0 10 0 11 11 57 55.1 6 133 -9 10 39 47 9 20 46 10 45 19 9 15 16 -0.20 106 0 0 9 7 3 11 57 53.7 7 134 -10 9 46 31 8 27 44 9 52 3 8 22 15 -0.21 107 0 0 8 14 7 11 57 52.0 9 134 -11 8 53 28 7 34 55 8 58 59 7 29 27 -0.22 108 0 0 7 21 27 11 57 50.1 10 134 -12 8 0 41 6 42 23 8 6 10 6 36 56 -0.23 109 0 0 6 29 5 11 57 47.9 11 134 -14 7 8 10 5 50 9 7 13 39 5 44 43 -0.23 110 0 0 5 37 3 11 57 45.5 13 134 -15 6 16 0 4 58 16 6 21 28 4 52 51 -0.23 111 0 0 4 45 24 11 57 42.8 14 134 -16 5 24 12 4 6 45 5 29 38 4 1 22 -0.24 112 0 0 3 54 9 11 57 39.8 15 134 -17 4 32 47 3 15 39 4 38 12 3 10 17 -0.24 113 0 0 3 3 20 11 57 36.6 17 134 -19 3 41 49 2 25 0 3 47 12 2 19 39 -0.24 114 0 0 2 12 59 11 57 33.2 18 135 -20 2 51 18 1 34 49 2 56 40 1 29 30 -0.24 115 0 0 1 23 9 11 57 29.5 19 135 -21 2 1 17 0 45 9 2 6 38 0 39 51 -0.24 116 0 0 0 33 50 11 57 25.6 20 135 -22 1 11 47 - 0 4 0 1 17 7 - 0 9 17 -0.24 117 0 0 - 0 14 56 11 57 21.5 22 135 -24 0 22 51 - 0 52 35 0 28 8 - 0 57 51 -0.24 118 0 0 - 1 3 8 11 57 17.2 23 135 -25 - 0 25 31 - 1 40 36 - 0 20 15 - 1 45 50 -0.25 119 0 0 - 1 50 43 11 57 12.6 24 135 -26 - 1 13 18 - 2 28 0 - 1 8 3 - 2 33 13 -0.25 120 0 0 - 2 37 41 11 57 7.9 25 135 -27 - 2 0 27 - 3 14 47 - 1 55 14 - 3 19 58 -0.25 121 0 0 - 3 24 1 11 57 3.0 27 135 -29 - 2 46 58 - 4 0 56 - 2 41 47 - 4 6 5 -0.25 122 0 0 - 4 9 41 11 56 57.8 28 135 -30 - 3 32 50 - 4 46 25 - 3 27 40 - 4 51 32 -0.25 123 0 0 - 4 54 41 11 56 52.6 29 135 -31 - 4 18 1 - 5 31 13 - 4 12 53 - 5 36 19 -0.25 124 0 0 - 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Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 14.4 Data for the target star ------------------------ * name: UCAC4 246-138801 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 48 25.6446 DE: -40 54 47.904 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 48 25.6446 DE: -40 54 47.904 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.7 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (134) Sophrosyne asteroid class: approx. diameter [km]: 105 approx. diameter ["]: 0.078 distance from Earth [AU]: 1.85770 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#131 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): 0.012", 0.005", 101.4° remarks: * orbital elements for (134)Sophrosyne : Mean anomaly = 201.1248202101 deg Arg. of pericenter = 85.5995109057 deg Long. of node = 345.8449559995 deg Inclination = 11.6101752570 deg Eccentricity = 0.1150165901 Semimajor axis = 2.5638752216 AU Perihelion dist = 2.2689870363 AU Mag: H = 8.82, G = 0.28 Epoch of elements : MJD 60482.49291829 TDT (2024 Jun 21.4929) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1312023Apr24,8.29,2024,6,21,11.830026,0.021463,0.230520,-7.117057,0.662595,0.000280,0.001660,0.000001,0.000000 179.9251,-40.9221,3.03,23.44,False UCAC4 246-138801,17.80712351,-40.9133065,12.03,11.68,11.49,0.0,0,,17.83629502,-40.9221089,1.53,1.34,0,0,0 134,Sophrosyne,12.91,104.934,1.8577,0,0,-2.971,3.14,,5.2,0 0,201.0065,2024,6,21,85.5995,345.8450,11.6102,0.11502,2.56388,2.26899,8.81,5.0,0.15 1.070,0.0117,0.0053,101,0.0054,Known errors,0.93,0,-1,-1 20240621_138801,60139.39 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 09:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org