IOTA/IOTA-ES occultation update for (3318) Blixen / UCAC4 464-004710 event on 2024 Oct 20, 09:44 UT Visible from Summary ------- On 2024 Oct 20 UT, the 22.8306614692565 km diameter asteroid (3318) Blixen will occult a 10.3 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.46 mag to 15.77 mag (the magnitude of the asteroid) for at most 2.060 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: 99 * date and approx. time of event: 2024 Oct 20, 09:35 - 2024 Oct 20, 09:53 * geocentric midpoint of event [JD]: 2460603.90579630 * magnitude of target star: 10.32 * magnitude drop [mag]: 5.46 * estimated maximum duration [s]: 2.060 * Moon: 88 % sunlit, 26° distance * Sun: 153° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 24 * 1 sigma uncertainty interval [path widths]: +/- 0.32 * 1 sigma uncertainty interval [seconds]: +/- 2.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.009) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.005", 69°) * approx speed of asteroid's shadow [km/s]: 11.1760 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 464-004710 by 3318 Blixen on 2024 Oct 20 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 147 0 0 -40 3 37 9 53 16.9 1 86 -14 -39 57 0 -40 10 14 -39 52 48 -40 14 27 .... 148 0 0 -40 0 11 9 53 16.8 1 85 -15 -39 53 34 -40 6 49 -39 49 22 -40 11 2 0.24 149 0 0 -39 56 28 9 53 16.5 2 84 -16 -39 49 50 -40 3 6 -39 45 38 -40 7 19 0.28 150 0 0 -39 52 27 9 53 16.1 3 84 -17 -39 45 49 -39 59 5 -39 41 37 -40 3 18 0.30 151 0 0 -39 48 8 9 53 15.7 4 83 -17 -39 41 30 -39 54 47 -39 37 17 -39 59 0 0.31 152 0 0 -39 43 31 9 53 15.1 5 83 -18 -39 36 53 -39 50 10 -39 32 40 -39 54 23 0.32 153 0 0 -39 38 37 9 53 14.4 5 82 -19 -39 31 58 -39 45 16 -39 27 45 -39 49 29 0.33 154 0 0 -39 33 25 9 53 13.6 6 81 -19 -39 26 46 -39 40 4 -39 22 33 -39 44 18 0.33 155 0 0 -39 27 55 9 53 12.7 7 81 -20 -39 21 15 -39 34 34 -39 17 2 -39 38 48 0.33 156 0 0 -39 22 7 9 53 11.6 8 80 -21 -39 15 27 -39 28 47 -39 11 14 -39 33 1 0.34 157 0 0 -39 16 2 9 53 10.5 8 79 -21 -39 9 22 -39 22 42 -39 5 8 -39 26 56 0.34 158 0 0 -39 9 39 9 53 9.2 9 79 -22 -39 2 58 -39 16 19 -38 58 44 -39 20 34 0.34 159 0 0 -39 2 58 9 53 7.9 10 78 -23 -38 56 17 -39 9 39 -38 52 3 -39 13 54 0.34 160 0 0 -38 56 0 9 53 6.4 11 77 -23 -38 49 19 -39 2 41 -38 45 4 -39 6 56 0.34 161 0 0 -38 48 44 9 53 4.8 11 77 -24 -38 42 2 -38 55 26 -38 37 48 -38 59 41 0.34 162 0 0 -38 41 10 9 53 3.1 12 76 -25 -38 34 28 -38 47 53 -38 30 14 -38 52 8 0.35 163 0 0 -38 33 19 9 53 1.3 13 76 -26 -38 26 37 -38 40 2 -38 22 22 -38 44 18 0.35 164 0 0 -38 25 11 9 52 59.3 14 75 -26 -38 18 28 -38 31 54 -38 14 13 -38 36 10 0.35 165 0 0 -38 16 45 9 52 57.3 15 74 -27 -38 10 2 -38 23 29 -38 5 46 -38 27 45 0.35 166 0 0 -38 8 1 9 52 55.1 15 74 -28 -38 1 18 -38 14 46 -37 57 2 -38 19 2 0.35 167 0 0 -37 59 1 9 52 52.8 16 73 -28 -37 52 16 -38 5 45 -37 48 0 -38 10 2 0.35 168 0 0 -37 49 42 9 52 50.4 17 72 -29 -37 42 58 -37 56 27 -37 38 41 -38 0 44 0.35 169 0 0 -37 40 7 9 52 47.9 18 72 -30 -37 33 22 -37 46 52 -37 29 5 -37 51 10 0.35 170 0 0 -37 30 14 9 52 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7 24 - 0 14 21 0.36 - 56 0 0 0 2 57 9 36 15.2 24 273 2 0 9 36 - 0 3 42 0 13 48 - 0 7 55 0.36 - 55 0 0 0 9 0 9 36 11.1 23 273 3 0 15 39 0 2 21 0 19 51 - 0 1 52 0.36 - 54 0 0 0 14 41 9 36 7.1 22 273 4 0 21 20 0 8 3 0 25 32 0 3 50 0.36 - 53 0 0 0 20 0 9 36 3.2 21 273 5 0 26 38 0 13 22 0 30 51 0 9 9 0.36 - 52 0 0 0 24 57 9 35 59.6 20 273 6 0 31 35 0 18 19 0 35 47 0 14 6 0.36 - 51 0 0 0 29 32 9 35 56.1 19 273 7 0 36 9 0 22 53 0 40 21 0 18 41 0.36 - 50 0 0 0 33 44 9 35 52.7 18 273 8 0 40 21 0 27 6 0 44 33 0 22 53 0.36 - 49 0 0 0 37 33 9 35 49.6 17 273 9 0 44 11 0 30 55 0 48 22 0 26 43 0.37 - 48 0 0 0 41 0 9 35 46.6 16 273 9 0 47 37 0 34 22 0 51 49 0 30 10 0.37 - 47 0 0 0 44 4 9 35 43.8 15 273 10 0 50 41 0 37 27 0 54 53 0 33 14 0.37 - 46 0 0 0 46 46 9 35 41.1 14 273 11 0 53 23 0 40 8 0 57 35 0 35 56 0.37 - 45 0 0 0 49 4 9 35 38.6 13 273 12 0 55 41 0 42 27 0 59 53 0 38 14 0.37 - 44 0 0 0 51 0 9 35 36.3 12 273 13 0 57 37 0 44 22 1 1 49 0 40 10 0.37 - 43 0 0 0 52 32 9 35 34.2 11 273 14 0 59 10 0 45 55 1 3 21 0 41 43 0.37 - 42 0 0 0 53 42 9 35 32.3 10 273 15 1 0 19 0 47 5 1 4 31 0 42 53 0.37 - 41 0 0 0 54 29 9 35 30.5 9 273 16 1 1 6 0 47 51 1 5 17 0 43 39 0.38 - 40 0 0 0 54 52 9 35 28.9 8 273 17 1 1 29 0 48 15 1 5 41 0 44 2 0.38 - 39 0 0 0 54 52 9 35 27.5 7 273 18 1 1 29 0 48 15 1 5 41 0 44 2 0.38 - 38 0 0 0 54 29 9 35 26.2 6 273 19 1 1 6 0 47 51 1 5 18 0 43 39 0.38 - 37 0 0 0 53 42 9 35 25.2 5 273 20 1 0 19 0 47 5 1 4 31 0 42 52 0.39 - 36 0 0 0 52 32 9 35 24.3 4 273 21 0 59 10 0 45 55 1 3 21 0 41 42 0.40 - 35 0 0 0 50 59 9 35 23.6 3 273 22 0 57 36 0 44 21 1 1 48 0 40 9 0.41 - 34 0 0 0 49 2 9 35 23.1 2 273 23 0 55 40 0 42 24 0 59 52 0 38 12 0.43 - 33 0 0 0 46 42 9 35 22.8 1 273 24 0 53 19 0 40 4 0 57 31 0 35 51 0.49 - 32 0 0 0 43 58 9 35 22.6 0 273 25 0 50 36 0 37 20 0 54 48 0 33 7 0.97 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 464-004710 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 03 24 20.8412 DE: +02 47 01.796 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 03 24 20.8415 DE: +02 47 01.794 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.3 * B mag [mag]: 10.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3318) Blixen asteroid class: approx. diameter [km]: 23 approx. diameter ["]: 0.015 distance from Earth [AU]: 2.14180 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 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): 0.021", 0.005", 68.937° remarks: * orbital elements for (3318)Blixen : Mean anomaly = 250.7366625238 deg Arg. of pericenter = 47.0865861092 deg Long. of node = 109.0376519946 deg Inclination = 11.5728358084 deg Eccentricity = 0.0478028253 Semimajor axis = 3.0100800496 AU Perihelion dist = 2.8661897189 AU Mag: H = 11.11, G = 0.15 Epoch of elements : MJD 60603.40579308 TDT (2024 Oct 20.4058) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,2.06,2024,10,20,9.739111,0.115726,-0.315177,-5.915064,-2.191752,-0.002527,0.000802,0.000001,0.000000 -124.0191,2.8740,30.09,-10.58,False UCAC4 464-004710,3.40578921,2.7838322,10.76,10.32,10.08,0.1,0,,3.42760686,2.8739758,5.45,5.24,0,0,0 3318,Blixen,15.77,22.986,2.1418,0,0,-1.621,-9.00,,1.4,0 0,250.6601,2024,10,20,47.0866,109.0377,11.5728,0.04780,3.01008,2.86619,11.10,5.0,0.15 1.317,0.0210,0.0047,69,0.0047,Known errors,1.10,0,-1,-1 20241020_004710,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:32 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org