IOTA/IOTA-ES occultation update for (37187) 2000 WP60 / UCAC4 323-152882 event on 2024 Oct 21, 23:41 UT Visible from Summary ------- On 2024 Oct 21 UT, the 13.3227923280967 km diameter asteroid (37187) 2000 WP60 will occult a 11.7 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 5.87 mag to 17.59 mag (the magnitude of the asteroid) for at most 0.420 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: 98 * date and approx. time of event: 2024 Oct 21, 23:38 - 2024 Oct 21, 23:44 * geocentric midpoint of event [JD]: 2460605.48717091 * magnitude of target star: 11.72 * magnitude drop [mag]: 5.87 * estimated maximum duration [s]: 0.420 * Moon: 73 % sunlit, 176° distance * Sun: 65° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 0.35 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.002", 103°) * approx speed of asteroid's shadow [km/s]: 33.5826 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 323-152882 by 37187 2000 WP60 on 2024 Oct 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 154 0 0 -11 4 6 23 38 30.6 0 116 63 -11 8 31 -10 59 40 -11 11 40 -10 56 32 .... 155 0 0 -11 33 11 23 38 30.7 1 116 64 -11 37 37 -11 28 44 -11 40 45 -11 25 36 0.31 156 0 0 -12 2 24 23 38 30.8 2 116 65 -12 6 51 -11 57 58 -12 10 0 -11 54 49 0.32 157 0 0 -12 31 46 23 38 31.0 3 115 66 -12 36 13 -12 27 19 -12 39 22 -12 24 10 0.32 158 0 0 -13 1 15 23 38 31.2 4 115 67 -13 5 42 -12 56 48 -13 8 51 -12 53 39 0.32 159 0 0 -13 30 50 23 38 31.6 6 115 68 -13 35 18 -13 26 23 -13 38 27 -13 23 14 0.32 160 0 0 -14 0 31 23 38 32.0 7 115 69 -14 4 59 -13 56 3 -14 8 9 -13 52 54 0.32 161 0 0 -14 30 17 23 38 32.5 8 114 70 -14 34 45 -14 25 49 -14 37 55 -14 22 39 0.32 162 0 0 -15 0 6 23 38 33.0 9 114 71 -15 4 34 -14 55 38 -15 7 44 -14 52 28 0.32 163 0 0 -15 29 58 23 38 33.6 10 114 71 -15 34 27 -15 25 30 -15 37 37 -15 22 20 0.32 164 0 0 -15 59 53 23 38 34.3 11 114 72 -16 4 22 -15 55 24 -16 7 32 -15 52 14 0.32 165 0 0 -16 29 49 23 38 35.1 12 113 73 -16 34 18 -16 25 20 -16 37 28 -16 22 10 0.32 166 0 0 -16 59 45 23 38 35.9 13 113 74 -17 4 14 -16 55 16 -17 7 24 -16 52 6 0.32 167 0 0 -17 29 41 23 38 36.8 14 113 75 -17 34 10 -17 25 12 -17 37 21 -17 22 2 0.32 168 0 0 -17 59 35 23 38 37.8 15 112 75 -18 4 5 -17 55 6 -18 7 15 -17 51 56 0.32 169 0 0 -18 29 28 23 38 38.8 16 112 76 -18 33 57 -18 24 59 -18 37 8 -18 21 48 0.32 170 0 0 -18 59 17 23 38 39.9 17 112 76 -19 3 47 -18 54 48 -19 6 57 -18 51 38 0.32 171 0 0 -19 29 3 23 38 41.0 19 111 77 -19 33 32 -19 24 34 -19 36 43 -19 21 23 0.32 172 0 0 -19 58 44 23 38 42.2 20 111 77 -20 3 13 -19 54 15 -20 6 24 -19 51 4 0.32 173 0 0 -20 28 20 23 38 43.5 21 111 78 -20 32 49 -20 23 50 -20 36 0 -20 20 40 0.32 174 0 0 -20 57 49 23 38 44.9 22 110 78 -21 2 18 -20 53 20 -21 5 29 -20 50 9 0.32 175 0 0 -21 27 11 23 38 46.2 23 110 78 -21 31 40 -21 22 42 -21 34 51 -21 19 32 0.32 176 0 0 -21 56 25 23 38 47.7 24 109 78 -22 0 54 -21 51 56 -22 4 5 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-43 -27 51 1 -27 42 10 -27 54 10 -27 39 1 0.34 - 26 0 0 -27 20 8 23 44 26.3 14 248 -44 -27 24 34 -27 15 42 -27 27 43 -27 12 34 0.34 - 25 0 0 -26 53 25 23 44 27.2 13 248 -45 -26 57 51 -26 48 58 -27 1 0 -26 45 50 0.35 - 24 0 0 -26 26 26 23 44 28.0 12 247 -46 -26 30 53 -26 21 59 -26 34 2 -26 18 50 0.35 - 23 0 0 -25 59 12 23 44 28.7 11 247 -47 -26 3 39 -25 54 45 -26 6 48 -25 51 36 0.35 - 22 0 0 -25 31 43 23 44 29.4 10 247 -48 -25 36 11 -25 27 16 -25 39 20 -25 24 7 0.35 - 21 0 0 -25 4 1 23 44 30.0 9 246 -48 -25 8 29 -24 59 34 -25 11 39 -24 56 24 0.36 - 20 0 0 -24 36 6 23 44 30.5 8 246 -49 -24 40 34 -24 31 38 -24 43 44 -24 28 29 0.36 - 19 0 0 -24 7 58 23 44 31.0 7 245 -50 -24 12 26 -24 3 30 -24 15 36 -24 0 21 0.37 - 18 0 0 -23 39 39 23 44 31.4 6 245 -51 -23 44 7 -23 35 11 -23 47 17 -23 32 1 0.38 - 17 0 0 -23 11 8 23 44 31.8 5 244 -52 -23 15 37 -23 6 40 -23 18 47 -23 3 30 0.39 - 16 0 0 -22 42 27 23 44 32.1 4 244 -53 -22 46 56 -22 37 59 -22 50 6 -22 34 48 0.40 - 15 0 0 -22 13 36 23 44 32.3 3 244 -54 -22 18 5 -22 9 8 -22 21 15 -22 5 57 0.43 - 14 0 0 -21 44 37 23 44 32.5 2 243 -54 -21 49 5 -21 40 8 -21 52 16 -21 36 58 0.48 - 13 0 0 -21 15 29 23 44 32.6 1 243 -55 -21 19 58 -21 11 0 -21 23 8 -21 7 50 0.63 - 12 0 0 -20 46 13 23 44 32.7 0 243 -56 -20 50 42 .. .. .. -20 53 53 .. .. .. 10.77 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 323-152882 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 17 19.5961 DE: -25 32 51.752 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 17 19.5961 DE: -25 32 51.752 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 11.7 * B mag [mag]: 13.6 * Diameter [mas]: 0.40 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (37187) 2000 WP60 asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.19300 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#48 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): 0.019", 0.002", 102.877° remarks: * orbital elements for (37187)2000 WP60 : Mean anomaly = 359.1284306478 deg Arg. of pericenter = 192.7893989012 deg Long. of node = 109.8287721745 deg Inclination = 12.2487295940 deg Eccentricity = 0.2395182264 Semimajor axis = 2.6195149873 AU Perihelion dist = 1.9920934035 AU Mag: H = 13.18, G = 0.15 Epoch of elements : MJD 60604.98717088 TDT (2024 Oct 21.9872) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#482023Apr25,0.42,2024,10,21,23.692102,-0.029038,-0.300258,18.870257,-1.789779,0.004831,0.000071,-0.000001,0.000000 -111.5750,-25.5397,-179.26,-11.14,False UCAC4 323-152882,18.28877675,-25.5477089,13.64,11.72,10.68,0.4,4,,18.31411983,-25.5396774,5.88,6.46,0,0,0 37187,2000 WP60,17.59,13.959,2.1930,0,0,5.592,-7.17,,1.0,0 0,358.8989,2024,10,21,192.7894,109.8288,12.2487,0.23952,2.61951,1.99209,13.18,5.0,0.15 1.354,0.0190,0.0019,103,0.0031,Known errors,0.70,0,-1,-1 20241021_152882,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org