IOTA/IOTA-ES occultation update for (10148) Shirase / TYC 5806-01289-1 event on 2024 Aug 08, 02:51 UT Visible from Summary ------- On 2024 Aug 08 UT, the 17.06 km diameter asteroid (10148) Shirase will occult a 10.5 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.88 mag to 17.42 mag (the magnitude of the asteroid) for at most 1.390 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: 93 * date and approx. time of event: 2024 Aug 08, 02:43 - 2024 Aug 08, 02:59 * geocentric midpoint of event [JD]: 2460530.61897562 * magnitude of target star: 10.54 * magnitude drop [mag]: 6.88 * estimated maximum duration [s]: 1.390 * Moon: 12 % sunlit, 153° distance * Sun: 166° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.47 * 1 sigma uncertainty interval [seconds]: +/- 3.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.027, +/- 0.011) * 1 sigma uncertainty ellipse (major, minor, PA): (0.029", 0.005", 70°) * approx speed of asteroid's shadow [km/s]: 12.2296 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5806-01289-1 by 10148 Shirase on 2024 Aug 8 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 -130 0 0 -41 49 53 2 59 21.1 0 106 -13 -41 44 43 -41 55 3 -41 39 54 -41 59 53 .... -129 0 0 -42 2 27 2 59 21.0 1 105 -14 -41 57 18 -42 7 37 -41 52 29 -42 12 26 0.34 -128 0 0 -42 14 41 2 59 20.8 2 104 -15 -42 9 32 -42 19 50 -42 4 44 -42 24 39 0.37 -127 0 0 -42 26 34 2 59 20.5 2 104 -15 -42 21 26 -42 31 43 -42 16 38 -42 36 31 0.38 -126 0 0 -42 38 7 2 59 20.2 3 103 -16 -42 32 59 -42 43 16 -42 28 12 -42 48 3 0.38 -125 0 0 -42 49 20 2 59 19.7 4 102 -17 -42 44 13 -42 54 28 -42 39 26 -42 59 15 0.39 -124 0 0 -43 0 13 2 59 19.1 5 102 -18 -42 55 6 -43 5 20 -42 50 20 -43 10 7 0.39 -123 0 0 -43 10 46 2 59 18.5 5 101 -18 -43 5 39 -43 15 52 -43 0 53 -43 20 39 0.39 -122 0 0 -43 20 58 2 59 17.7 6 100 -19 -43 15 52 -43 26 4 -43 11 6 -43 30 50 0.39 -121 0 0 -43 30 51 2 59 16.9 7 100 -20 -43 25 45 -43 35 56 -43 21 0 -43 40 42 0.39 -120 0 0 -43 40 23 2 59 16.0 8 99 -21 -43 35 18 -43 45 29 -43 30 33 -43 50 14 0.39 -119 0 0 -43 49 36 2 59 14.9 8 98 -21 -43 44 31 -43 54 41 -43 39 47 -43 59 26 0.40 -118 0 0 -43 58 29 2 59 13.8 9 98 -22 -43 53 24 -44 3 34 -43 48 41 -44 8 18 0.40 -117 0 0 -44 7 2 2 59 12.6 10 97 -23 -44 1 58 -44 12 6 -43 57 15 -44 16 50 0.40 -116 0 0 -44 15 16 2 59 11.4 11 96 -23 -44 10 12 -44 20 20 -44 5 29 -44 25 3 0.40 -115 0 0 -44 23 10 2 59 10.0 11 96 -24 -44 18 6 -44 28 13 -44 13 24 -44 32 56 0.40 -114 0 0 -44 30 44 2 59 8.6 12 95 -25 -44 25 41 -44 35 47 -44 20 59 -44 40 30 0.40 -113 0 0 -44 37 59 2 59 7.0 13 94 -26 -44 32 57 -44 43 2 -44 28 14 -44 47 45 0.40 -112 0 0 -44 44 55 2 59 5.4 13 93 -26 -44 39 52 -44 49 57 -44 35 11 -44 54 40 0.40 -111 0 0 -44 51 31 2 59 3.7 14 93 -27 -44 46 29 -44 56 33 -44 41 48 -45 1 15 0.40 -110 0 0 -44 57 48 2 59 2.0 15 92 -28 -44 52 46 -45 2 50 -44 48 5 -45 7 32 0.40 -109 0 0 -45 3 46 2 59 0.1 16 91 -28 -44 58 45 -45 8 48 -44 54 4 -45 13 29 0.40 -108 0 0 -45 9 25 2 58 58.2 16 91 -29 -45 4 24 -45 14 26 -44 59 43 -45 19 7 0.40 -107 0 0 -45 14 44 2 58 56.2 17 90 -30 -45 9 44 -45 19 46 -45 5 3 -45 24 27 0.40 -106 0 0 -45 19 45 2 58 54.2 18 89 -30 -45 14 45 -45 24 46 -45 10 4 -45 29 27 0.40 -105 0 0 -45 24 27 2 58 52.0 18 88 -31 -45 19 27 -45 29 28 -45 14 46 -45 34 8 0.40 -104 0 0 -45 28 50 2 58 49.8 19 88 -32 -45 23 50 -45 33 50 -45 19 10 -45 38 31 0.40 -103 0 0 -45 32 54 2 58 47.5 20 87 -32 -45 27 54 -45 37 54 -45 23 14 -45 42 34 0.40 -102 0 0 -45 36 39 2 58 45.1 20 86 -33 -45 31 39 -45 41 39 -45 27 0 -45 46 19 0.40 -101 0 0 -45 40 5 2 58 42.7 21 85 -34 -45 35 6 -45 45 5 -45 30 26 -45 49 45 0.40 -100 0 0 -45 43 13 2 58 40.2 22 85 -34 -45 38 14 -45 48 13 -45 33 34 -45 52 53 0.40 - 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5 44 11 2 43 36.8 15 259 -2 - 5 38 58 - 5 49 24 - 5 34 7 - 5 54 16 0.42 51 0 0 - 5 26 1 2 43 34.2 14 259 -1 - 5 20 48 - 5 31 13 - 5 15 58 - 5 36 4 0.42 52 0 0 - 5 8 11 2 43 31.8 13 259 0 - 5 3 0 - 5 13 23 - 4 58 9 - 5 18 14 0.42 53 0 0 - 4 50 43 2 43 29.6 12 259 1 - 4 45 32 - 4 55 54 - 4 40 42 - 5 0 45 0.42 54 0 0 - 4 33 37 2 43 27.5 11 259 2 - 4 28 26 - 4 38 47 - 4 23 36 - 4 43 37 0.43 55 0 0 - 4 16 52 2 43 25.7 10 259 3 - 4 11 42 - 4 22 2 - 4 6 53 - 4 26 52 0.43 56 0 0 - 4 0 30 2 43 24.0 9 259 4 - 3 55 21 - 4 5 40 - 3 50 32 - 4 10 29 0.43 57 0 0 - 3 44 31 2 43 22.4 8 259 5 - 3 39 22 - 3 49 40 - 3 34 33 - 3 54 29 0.44 58 0 0 - 3 28 54 2 43 21.1 7 259 6 - 3 23 45 - 3 34 3 - 3 18 58 - 3 38 51 0.44 59 0 0 - 3 13 41 2 43 19.9 6 258 7 - 3 8 33 - 3 18 49 - 3 3 45 - 3 23 37 0.45 60 0 0 - 2 58 51 2 43 18.9 5 258 8 - 2 53 43 - 3 3 59 - 2 48 56 - 3 8 46 0.46 61 0 0 - 2 44 25 2 43 18.1 4 258 9 - 2 39 17 - 2 49 32 - 2 34 31 - 2 54 19 0.47 62 0 0 - 2 30 22 2 43 17.5 3 258 10 - 2 25 15 - 2 35 29 - 2 20 29 - 2 40 16 0.50 63 0 0 - 2 16 44 2 43 17.1 2 258 11 - 2 11 38 - 2 21 51 - 2 6 52 - 2 26 37 0.54 64 0 0 - 2 3 30 2 43 16.8 1 258 12 - 1 58 24 - 2 8 37 - 1 53 39 - 2 13 23 0.69 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 5806-01289-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 22 08 41.8536 DE: -11 55 36.329 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 22 08 41.8536 DE: -11 55 36.329 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.5 * B mag [mag]: 10.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (10148) Shirase asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.20050 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 date of fit: 2023 Apr 25 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): 0.029", 0.005", 69.956° remarks: * orbital elements for (10148)Shirase : Mean anomaly = 79.5866782921 deg Arg. of pericenter = 220.7420879320 deg Long. of node = 9.0692482171 deg Inclination = 0.4540226666 deg Eccentricity = 0.1398083675 Semimajor axis = 3.2121447920 AU Perihelion dist = 2.7630600725 AU Mag: H = 12.79, G = 0.15 Epoch of elements : MJD 60530.11897588 TDT (2024 Aug 08.1190) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr25,1.39,2024,8,8,2.855415,0.131885,-0.355478,-6.469718,-2.406377,-0.001304,-0.000445,0.000001,0.000000 -27.4349,-11.8048,138.59,16.02,False TYC 5806-01289-1,22.14495932,-11.9267581,10.81,10.54,10.39,0.0,0,,22.16721648,-11.8048351,6.88,6.57,0,0,0 10148,Shirase,17.42,17.060,2.2005,0,0,-1.761,-9.62,,1.6,0 0,79.5663,2024,8,8,220.7421,9.0692,0.4540,0.13981,3.21214,2.76306,12.79,5.0,0.15 1.467,0.0287,0.0050,70,0.0050,Known errors,0.99,0,-1,-1 20240808_1289-1,60140.24 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org