IOTA/IOTA-ES occultation update for (29665) 1998 WD24 / TYC 6808-01394-1 event on 2024 Feb 13, 03:33 UT Visible from Summary ------- On 2024 Feb 13 UT, the 21.372 km diameter asteroid (29665) 1998 WD24 will occult a 9.9 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 7.88 mag to 17.77 mag (the magnitude of the asteroid) for at most 0.710 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: 91 * date and approx. time of event: 2024 Feb 13, 03:30 - 2024 Feb 13, 03:36 * geocentric midpoint of event [JD]: 2460353.64823525 * magnitude of target star: 9.89 * magnitude drop [mag]: 7.88 * estimated maximum duration [s]: 0.710 * Moon: 15 % sunlit, 116° distance * Sun: 71° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 24 * 1 sigma uncertainty interval [path widths]: +/- 0.51 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.022, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.004", 93°) * approx speed of asteroid's shadow [km/s]: 30.0990 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6808-01394-1 by 29665 1998 WD24 on 2024 Feb 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 - 40 0 0 .. .. .... .. .. .. .. .. .. - 9 27 59 .. .. .. - 9 35 27 .. .. .. .... - 39 0 0 - 9 54 22 3 30 16.3 1 119 -65 -10 1 47 - 9 46 57 -10 9 17 - 9 39 29 .... - 38 0 0 -10 28 36 3 30 16.4 2 119 -64 -10 36 3 -10 21 10 -10 43 35 -10 13 40 0.44 - 37 0 0 -11 3 18 3 30 16.7 3 119 -63 -11 10 46 -10 55 49 -11 18 20 -10 48 18 0.46 - 36 0 0 -11 38 25 3 30 17.0 5 119 -62 -11 45 56 -11 30 55 -11 53 30 -11 23 22 0.46 - 35 0 0 -12 13 58 3 30 17.4 6 118 -61 -12 21 30 -12 6 26 -12 29 6 -11 58 51 0.47 - 34 0 0 -12 49 54 3 30 17.9 7 118 -60 -12 57 28 -12 42 21 -13 5 6 -12 34 44 0.47 - 33 0 0 -13 26 14 3 30 18.5 8 118 -59 -13 33 50 -13 18 39 -13 41 30 -13 11 1 0.47 - 32 0 0 -14 2 56 3 30 19.2 9 118 -58 -14 10 33 -13 55 20 -14 18 15 -13 47 40 0.47 - 31 0 0 -14 39 59 3 30 20.0 10 117 -57 -14 47 38 -14 32 21 -14 55 21 -14 24 40 0.48 - 30 0 0 -15 17 22 3 30 20.9 11 117 -56 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24.3 20 249 55 -46 4 40 -45 49 38 -46 12 16 -45 42 3 0.50 145 0 0 -45 31 14 3 36 25.4 19 248 55 -45 38 47 -45 23 42 -45 46 25 -45 16 6 0.50 146 0 0 -45 4 48 3 36 26.5 18 247 56 -45 12 23 -44 57 14 -45 20 2 -44 49 37 0.50 147 0 0 -44 37 51 3 36 27.6 18 246 56 -44 45 27 -44 30 15 -44 53 8 -44 22 36 0.50 148 0 0 -44 10 22 3 36 28.6 17 246 56 -44 18 0 -44 2 45 -44 25 42 -43 55 4 0.51 149 0 0 -43 42 22 3 36 29.6 16 245 56 -43 50 1 -43 34 43 -43 57 45 -43 27 1 0.51 150 0 0 -43 13 50 3 36 30.6 15 244 55 -43 21 31 -43 6 10 -43 29 16 -42 58 26 0.51 151 0 0 -42 44 47 3 36 31.5 14 244 55 -42 52 30 -42 37 6 -43 0 16 -42 29 21 0.51 152 0 0 -42 15 14 3 36 32.4 13 243 55 -42 22 58 -42 7 31 -42 30 46 -41 59 45 0.51 153 0 0 -41 45 10 3 36 33.2 12 242 55 -41 52 55 -41 37 26 -42 0 45 -41 29 38 0.52 154 0 0 -41 14 36 3 36 34.0 11 241 55 -41 22 22 -41 6 50 -41 30 13 -40 59 1 0.52 155 0 0 -40 43 32 3 36 34.7 11 241 55 -40 51 20 -40 35 45 -40 59 12 -40 27 55 0.52 156 0 0 -40 11 59 3 36 35.4 10 240 55 -40 19 47 -40 4 11 -40 27 41 -39 56 19 0.53 157 0 0 -39 39 57 3 36 36.0 9 239 54 -39 47 46 -39 32 7 -39 55 41 -39 24 15 0.53 158 0 0 -39 7 26 3 36 36.5 8 239 54 -39 15 17 -38 59 36 -39 23 12 -38 51 42 0.54 159 0 0 -38 34 28 3 36 37.0 7 238 54 -38 42 20 -38 26 36 -38 50 16 -38 18 42 0.55 160 0 0 -38 1 2 3 36 37.5 6 238 53 -38 8 55 -37 53 10 -38 16 53 -37 45 14 0.56 161 0 0 -37 27 10 3 36 37.9 5 237 53 -37 35 4 -37 19 17 -37 43 2 -37 11 21 0.57 162 0 0 -36 52 53 3 36 38.2 4 236 53 -37 0 47 -36 44 59 -37 8 46 -36 37 1 0.60 163 0 0 -36 18 10 3 36 38.4 3 236 52 -36 26 5 -36 10 15 -36 34 5 -36 2 17 0.64 164 0 0 -35 43 3 3 36 38.6 2 235 52 -35 50 59 -35 35 8 -35 59 0 -35 27 9 0.72 165 0 0 -35 7 33 3 36 38.7 1 235 51 -35 15 30 -34 59 37 -35 23 31 -34 51 38 0.99 166 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -34 47 40 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 13.2 Data for the target star ------------------------ * name: TYC 6808-01394-1 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 40 16.3607 DE: -28 53 36.231 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 40 16.3609 DE: -28 53 36.232 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.9 * B mag [mag]: 10.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (29665) 1998 WD24 asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.012 distance from Earth [AU]: 2.38100 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 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): 0.022", 0.004", 92.89° remarks: * orbital elements for (29665)1998 WD24 : Mean anomaly = 1.3717684148 deg Arg. of pericenter = 239.1565742435 deg Long. of node = 346.8960577539 deg Inclination = 7.9868684124 deg Eccentricity = 0.2107865388 Semimajor axis = 2.8691579721 AU Perihelion dist = 2.2643780940 AU Mag: H = 12.98, G = 0.15 Epoch of elements : MJD 60353.14823516 TDT (2024 Feb 13.1482) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr25,0.71,2024,2,13,3.557646,-0.109944,-0.414905,16.425503,-4.338090,-0.005376,0.000515,0.000000,0.000000 54.3979,-28.9401,130.19,-13.55,False TYC 6808-01394-1,16.67121125,-28.8933976,10.04,9.89,9.81,0.0,0,,16.69621132,-28.9400594,7.88,7.52,0,0,0 29665,1998 WD24,17.77,21.372,2.3810,0,0,4.622,-16.02,,1.6,0 0,1.3417,2024,2,13,239.1566,346.8961,7.9869,0.21079,2.86916,2.26438,12.98,5.0,0.15 1.504,0.0223,0.0043,93,0.0063,Known errors,0.94,0,-1,-1 20240213_1394-1,60138.17 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 04:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org