IOTA/IOTA-ES occultation update for (43084) 1999 WQ1 / UCAC4 330-156643 event on 2024 Nov 05, 17:16 UT Visible from Summary ------- On 2024 Nov 05 UT, the 13.402 km diameter asteroid (43084) 1999 WQ1 will occult a 11.1 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 8.48 mag to 19.53 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: 90 * date and approx. time of event: 2024 Nov 05, 17:13 - 2024 Nov 05, 17:19 * geocentric midpoint of event [JD]: 2460620.21981646 * magnitude of target star: 11.05 * magnitude drop [mag]: 8.48 * estimated maximum duration [s]: 0.420 * Moon: 16 % sunlit, 8° distance * Sun: 53° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 0.53 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.002", 106°) * approx speed of asteroid's shadow [km/s]: 31.8570 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 330-156643 by 43084 1999 WQ1 on 2024 Nov 5 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 -124 0 0 -17 14 4 17 13 29.3 0 115 50 -17 18 29 -17 9 39 -17 23 8 -17 5 1 .... -123 0 0 -17 41 18 17 13 29.4 1 115 51 -17 45 44 -17 36 53 -17 50 23 -17 32 15 0.39 -122 0 0 -18 8 42 17 13 29.5 2 114 52 -18 13 7 -18 4 16 -18 17 47 -17 59 37 0.42 -121 0 0 -18 36 13 17 13 29.7 3 114 53 -18 40 39 -18 31 47 -18 45 19 -18 27 8 0.43 -120 0 0 -19 3 52 17 13 30.0 4 114 54 -19 8 18 -18 59 26 -19 12 59 -18 54 46 0.44 -119 0 0 -19 31 38 17 13 30.4 5 114 55 -19 36 4 -19 27 11 -19 40 45 -19 22 31 0.44 -118 0 0 -19 59 29 17 13 30.8 7 113 56 -20 3 56 -19 55 2 -20 8 37 -19 50 22 0.44 -117 0 0 -20 27 26 17 13 31.3 8 113 57 -20 31 53 -20 22 59 -20 36 34 -20 18 18 0.45 -116 0 0 -20 55 27 17 13 31.9 9 112 58 -20 59 54 -20 50 59 -21 4 36 -20 46 18 0.45 -115 0 0 -21 23 31 17 13 32.5 10 112 59 -21 27 59 -21 19 4 -21 32 41 -21 14 22 0.45 -114 0 0 -21 51 39 17 13 33.2 11 112 60 -21 56 7 -21 47 11 -22 0 49 -21 42 29 0.45 -113 0 0 -22 19 48 17 13 34.0 12 111 61 -22 24 16 -22 15 20 -22 28 59 -22 10 38 0.45 -112 0 0 -22 47 58 17 13 34.8 13 111 61 -22 52 27 -22 43 30 -22 57 9 -22 38 48 0.45 -111 0 0 -23 16 9 17 13 35.8 14 110 62 -23 20 38 -23 11 41 -23 25 21 -23 6 59 0.45 -110 0 0 -23 44 20 17 13 36.7 15 110 63 -23 48 49 -23 39 51 -23 53 31 -23 35 9 0.45 -109 0 0 -24 12 29 17 13 37.8 16 110 64 -24 16 58 -24 8 0 -24 21 41 -24 3 18 0.45 -108 0 0 -24 40 36 17 13 38.9 17 109 65 -24 45 5 -24 36 7 -24 49 48 -24 31 25 0.45 -107 0 0 -25 8 40 17 13 40.1 18 109 65 -25 13 10 -25 4 11 -25 17 53 -24 59 29 0.45 -106 0 0 -25 36 41 17 13 41.3 19 108 66 -25 41 10 -25 32 12 -25 45 54 -25 27 29 0.45 -105 0 0 -26 4 37 17 13 42.6 20 108 67 -26 9 7 -26 0 8 -26 13 50 -25 55 26 0.45 -104 0 0 -26 32 29 17 13 44.0 21 107 67 -26 36 58 -26 27 59 -26 41 41 -26 23 17 0.45 -103 0 0 -27 0 14 17 13 45.4 22 107 68 -27 4 43 -26 55 45 -27 9 27 -26 51 2 0.45 -102 0 0 -27 27 53 17 13 46.9 23 106 69 -27 32 22 -27 23 24 -27 37 5 -27 18 41 0.45 -101 0 0 -27 55 24 17 13 48.4 24 106 69 -27 59 53 -27 50 55 -28 4 37 -27 46 12 0.45 -100 0 0 -28 22 47 17 13 50.0 25 105 70 -28 27 16 -28 18 18 -28 32 0 -28 13 36 0.45 - 99 0 0 -28 50 2 17 13 51.6 26 104 70 -28 54 31 -28 45 33 -28 59 14 -28 40 50 0.45 - 98 0 0 -29 17 7 17 13 53.3 27 104 71 -29 21 36 -29 12 38 -29 26 19 -29 7 55 0.45 - 97 0 0 -29 44 1 17 13 55.0 28 103 71 -29 48 30 -29 39 33 -29 53 13 -29 34 50 0.45 - 96 0 0 -30 10 45 17 13 56.8 29 103 71 -30 15 14 -30 6 17 -30 19 57 -30 1 35 0.45 - 95 0 0 -30 37 18 17 13 58.6 30 102 71 -30 41 46 -30 32 49 -30 46 29 -30 28 7 0.45 - 94 0 0 -31 3 38 17 14 0.5 31 101 72 -31 8 6 -30 59 10 -31 12 49 -30 54 28 0.45 - 93 0 0 -31 29 46 17 14 2.4 31 101 72 -31 34 14 -31 25 18 -31 38 56 -31 20 36 0.45 - 92 0 0 -31 55 40 17 14 4.4 32 100 72 -32 0 8 -31 51 12 -32 4 50 -31 46 31 0.45 - 91 0 0 -32 21 20 17 14 6.4 33 99 72 -32 25 48 -32 16 53 -32 30 30 -32 12 12 0.45 - 90 0 0 -32 46 47 17 14 8.4 34 99 72 -32 51 14 -32 42 19 -32 55 55 -32 37 39 0.45 - 89 0 0 -33 11 58 17 14 10.4 35 98 72 -33 16 25 -33 7 31 -33 21 6 -33 2 51 0.45 - 88 0 0 -33 36 54 17 14 12.5 36 97 72 -33 41 20 -33 32 27 -33 46 1 -33 27 47 0.45 - 87 0 0 -34 1 33 17 14 14.7 37 96 72 -34 6 0 -33 57 7 -34 10 40 -33 52 28 0.45 - 86 0 0 -34 25 57 17 14 16.8 38 95 71 -34 30 23 -34 21 31 -34 35 3 -34 16 52 0.45 - 85 0 0 -34 50 4 17 14 19.0 39 95 71 -34 54 29 -34 45 38 -34 59 9 -34 40 59 0.45 - 84 0 0 -35 13 53 17 14 21.2 39 94 71 -35 18 18 -35 9 28 -35 22 57 -35 4 50 0.45 - 83 0 0 -35 37 25 17 14 23.5 40 93 70 -35 41 50 -35 33 0 -35 46 28 -35 28 22 0.45 - 82 0 0 -36 0 39 17 14 25.8 41 92 70 -36 5 3 -35 56 14 -36 9 41 -35 51 37 0.45 - 81 0 0 -36 23 34 17 14 28.0 42 91 70 -36 27 58 -36 19 10 -36 32 36 -36 14 33 0.45 - 80 0 0 -36 46 11 17 14 30.4 43 90 69 -36 50 34 -36 41 48 -36 55 12 -36 37 11 0.45 - 79 0 0 -37 8 29 17 14 32.7 44 89 69 -37 12 52 -37 4 6 -37 17 28 -36 59 30 0.45 - 78 0 0 -37 30 27 17 14 35.1 44 88 68 -37 34 50 -37 26 5 -37 39 26 -37 21 29 0.45 - 77 0 0 -37 52 6 17 14 37.4 45 87 68 -37 56 28 -37 47 44 -38 1 4 -37 43 9 0.45 - 76 0 0 -38 13 26 17 14 39.8 46 86 67 -38 17 47 -38 9 4 -38 22 22 -38 4 29 0.45 - 75 0 0 -38 34 25 17 14 42.2 47 85 66 -38 38 46 -38 30 4 -38 43 20 -38 25 30 0.45 - 74 0 0 -38 55 4 17 14 44.6 47 84 66 -38 59 24 -38 50 43 -39 3 58 -38 46 10 0.45 - 73 0 0 -39 15 22 17 14 47.1 48 83 65 -39 19 42 -39 11 2 -39 24 16 -39 6 29 0.45 - 72 0 0 -39 35 20 17 14 49.5 49 82 65 -39 39 40 -39 31 1 -39 44 12 -39 26 28 0.45 - 71 0 0 -39 54 57 17 14 52.0 50 81 64 -39 59 16 -39 50 38 -40 3 49 -39 46 6 0.45 - 70 0 0 -40 14 13 17 14 54.4 50 79 63 -40 18 32 -40 9 55 -40 23 4 -40 5 24 0.45 - 69 0 0 -40 33 9 17 14 56.9 51 78 63 -40 37 27 -40 28 51 -40 41 58 -40 24 20 0.45 - 68 0 0 -40 51 43 17 14 59.4 52 77 62 -40 56 0 -40 47 25 -41 0 31 -40 42 55 0.45 - 67 0 0 -41 9 55 17 15 1.9 52 76 61 -41 14 12 -41 5 39 -41 18 42 -41 1 9 0.45 - 66 0 0 -41 27 47 17 15 4.4 53 74 61 -41 32 3 -41 23 31 -41 36 33 -41 19 2 0.45 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6.6 64 31 43 -47 2 22 -46 54 14 -47 6 38 -46 49 58 0.45 - 40 0 0 -47 6 57 17 16 9.1 65 29 43 -47 11 1 -47 2 54 -47 15 17 -46 58 39 0.45 - 39 0 0 -47 15 16 17 16 11.5 65 27 42 -47 19 19 -47 11 14 -47 23 35 -47 6 59 0.45 - 38 0 0 -47 23 15 17 16 13.9 65 24 41 -47 27 18 -47 19 13 -47 31 33 -47 14 58 0.45 - 37 0 0 -47 30 54 17 16 16.4 65 22 41 -47 34 56 -47 26 52 -47 39 11 -47 22 37 0.45 - 36 0 0 -47 38 12 17 16 18.8 65 20 40 -47 42 14 -47 34 10 -47 46 28 -47 29 56 0.45 - 35 0 0 -47 45 10 17 16 21.2 65 18 39 -47 49 12 -47 41 9 -47 53 26 -47 36 55 0.45 - 34 0 0 -47 51 48 17 16 23.6 65 15 39 -47 55 49 -47 47 47 -48 0 3 -47 43 34 0.45 - 33 0 0 -47 58 6 17 16 26.0 66 13 38 -48 2 7 -47 54 5 -48 6 20 -47 49 52 0.45 - 32 0 0 -48 4 4 17 16 28.4 66 11 37 -48 8 5 -48 0 4 -48 12 18 -47 55 51 0.45 - 31 0 0 -48 9 42 17 16 30.7 66 9 37 -48 13 43 -48 5 42 -48 17 55 -48 1 30 0.45 - 30 0 0 -48 15 1 17 16 33.1 66 6 36 -48 19 1 -48 11 1 -48 23 13 -48 6 49 0.45 - 29 0 0 -48 19 59 17 16 35.5 66 4 35 -48 23 59 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2 17 19 24.5 17 252 -27 -34 52 27 -34 43 36 -34 57 6 -34 38 57 0.47 58 0 0 -34 24 0 17 19 25.5 16 252 -28 -34 28 26 -34 19 35 -34 33 6 -34 14 56 0.48 59 0 0 -33 59 43 17 19 26.5 16 251 -29 -34 4 9 -33 55 17 -34 8 49 -33 50 37 0.48 60 0 0 -33 35 9 17 19 27.4 15 251 -30 -33 39 36 -33 30 43 -33 44 16 -33 26 3 0.48 61 0 0 -33 10 20 17 19 28.3 14 250 -31 -33 14 47 -33 5 53 -33 19 28 -33 1 13 0.48 62 0 0 -32 45 16 17 19 29.1 13 250 -32 -32 49 43 -32 40 49 -32 54 24 -32 36 8 0.48 63 0 0 -32 19 57 17 19 29.9 12 249 -32 -32 24 24 -32 15 29 -32 29 5 -32 10 49 0.49 64 0 0 -31 54 24 17 19 30.6 11 248 -33 -31 58 51 -31 49 56 -32 3 33 -31 45 15 0.49 65 0 0 -31 28 37 17 19 31.3 10 248 -34 -31 33 5 -31 24 9 -31 37 47 -31 19 28 0.49 66 0 0 -31 2 37 17 19 31.9 9 247 -35 -31 7 5 -30 58 9 -31 11 47 -30 53 28 0.50 67 0 0 -30 36 25 17 19 32.4 8 247 -36 -30 40 53 -30 31 57 -30 45 36 -30 27 15 0.50 68 0 0 -30 10 1 17 19 32.9 7 246 -37 -30 14 30 -30 5 33 -30 19 12 -30 0 51 0.51 69 0 0 -29 43 26 17 19 33.3 6 246 -37 -29 47 55 -29 38 57 -29 52 37 -29 34 15 0.52 70 0 0 -29 16 40 17 19 33.7 5 245 -38 -29 21 9 -29 12 12 -29 25 52 -29 7 29 0.53 71 0 0 -28 49 44 17 19 34.0 4 245 -39 -28 54 13 -28 45 16 -28 58 56 -28 40 34 0.55 72 0 0 -28 22 39 17 19 34.2 3 244 -40 -28 27 8 -28 18 11 -28 31 51 -28 13 28 0.58 73 0 0 -27 55 26 17 19 34.4 2 244 -41 -27 59 55 -27 50 57 -28 4 38 -27 46 15 0.65 74 0 0 -27 28 4 17 19 34.5 1 243 -42 -27 32 33 -27 23 35 -27 37 16 -27 18 53 0.82 75 0 0 -27 0 36 17 19 34.6 0 243 -43 -27 5 5 -26 56 7 -27 9 48 -26 51 24 4.93 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 330-156643 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 28 09.7389 DE: -24 00 02.935 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 28 09.7386 DE: -24 00 02.935 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.1 * B mag [mag]: 11.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (43084) 1999 WQ1 asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.005 distance from Earth [AU]: 3.52380 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#44 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): 0.010", 0.002", 106.156° remarks: * orbital elements for (43084)1999 WQ1 : Mean anomaly = 253.2945702420 deg Arg. of pericenter = 315.9184450776 deg Long. of node = 109.0775922716 deg Inclination = 18.5903403736 deg Eccentricity = 0.2760329432 Semimajor axis = 2.6609330244 AU Perihelion dist = 1.9264278501 AU Mag: H = 13.55, G = 0.15 Epoch of elements : MJD 60619.71981625 TDT (2024 Nov 05.7198) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#442023Apr25,0.42,2024,11,5,17.275595,-0.038064,-0.407009,17.899997,-1.704602,0.004723,0.000200,-0.000001,0.000000 -27.1449,-23.9862,-83.23,-15.98,False UCAC4 330-156643,18.46937196,-24.0008153,11.49,11.05,10.81,0.0,0,,18.49436248,-23.9861598,8.48,8.27,0,0,0 43084,1999 WQ1,19.53,13.402,3.5238,0,0,3.260,-4.25,,1.2,0 0,253.1311,2024,11,5,315.9184,109.0776,18.5903,0.27603,2.66093,1.92643,13.55,5.0,0.15 1.525,0.0097,0.0022,106,0.0028,Known errors,0.61,0,-1,-1 20241105_156643,60140.68 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:23 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org