IOTA/IOTA-ES occultation update for (3318) Blixen / UCAC4 459-004190 event on 2024 Nov 12, 14:46 UT Visible from Summary ------- On 2024 Nov 12 UT, the 22.827396614617 km diameter asteroid (3318) Blixen will occult a 10.0 mag star in the constellation Cetus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.55 mag to 15.55 mag (the magnitude of the asteroid) for at most 1.730 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 Nov 12, 14:37 - 2024 Nov 12, 14:54 * geocentric midpoint of event [JD]: 2460627.11530713 * magnitude of target star: 10.01 * magnitude drop [mag]: 5.55 * estimated maximum duration [s]: 1.730 * Moon: 86 % sunlit, 41° distance * Sun: 164° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 23 * 1 sigma uncertainty interval [path widths]: +/- 0.47 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.009) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.005", 69°) * approx speed of asteroid's shadow [km/s]: 13.2725 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 459-004190 by 3318 Blixen on 2024 Nov 12 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 42 0 0 -15 31 43 14 53 57.3 0 88 5 -15 25 24 -15 38 1 -15 19 24 -15 44 2 .... 43 0 0 -15 29 41 14 53 57.2 1 88 4 -15 23 23 -15 36 0 -15 17 23 -15 42 1 0.09 44 0 0 -15 27 33 14 53 57.0 2 87 3 -15 21 15 -15 33 52 -15 15 14 -15 39 53 0.12 45 0 0 -15 25 18 14 53 56.6 3 87 2 -15 18 59 -15 31 37 -15 12 59 -15 37 37 0.13 46 0 0 -15 22 56 14 53 56.0 4 87 2 -15 16 37 -15 29 15 -15 10 37 -15 35 15 0.13 47 0 0 -15 20 27 14 53 55.4 5 87 1 -15 14 8 -15 26 46 -15 8 8 -15 32 47 0.14 48 0 0 -15 17 51 14 53 54.6 6 86 0 -15 11 32 -15 24 10 -15 5 32 -15 30 11 0.14 49 0 0 -15 15 9 14 53 53.7 7 86 -1 -15 8 50 -15 21 28 -15 2 49 -15 27 28 0.14 50 0 0 -15 12 20 14 53 52.6 8 86 -2 -15 6 1 -15 18 39 -15 0 0 -15 24 39 0.15 51 0 0 -15 9 24 14 53 51.4 9 86 -3 -15 3 5 -15 15 43 -14 57 4 -15 21 44 0.15 52 0 0 -15 6 21 14 53 50.0 10 85 -4 -15 0 2 -15 12 40 -14 54 2 -15 18 41 0.15 53 0 0 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2 10 3 0.16 -149 0 0 - 1 57 49 14 38 22.2 14 272 -14 - 1 51 31 - 2 4 8 - 1 45 31 - 2 10 8 0.16 -148 0 0 - 1 58 3 14 38 20.2 13 272 -13 - 1 51 44 - 2 4 21 - 1 45 44 - 2 10 22 0.16 -147 0 0 - 1 58 24 14 38 18.4 12 272 -12 - 1 52 5 - 2 4 42 - 1 46 5 - 2 10 43 0.16 -146 0 0 - 1 58 52 14 38 16.7 11 272 -11 - 1 52 33 - 2 5 11 - 1 46 33 - 2 11 11 0.16 -145 0 0 - 1 59 28 14 38 15.2 10 272 -10 - 1 53 9 - 2 5 46 - 1 47 9 - 2 11 47 0.16 -144 0 0 - 2 0 11 14 38 13.8 9 272 -9 - 1 53 53 - 2 6 30 - 1 47 53 - 2 12 30 0.16 -143 0 0 - 2 1 2 14 38 12.5 8 272 -8 - 1 54 44 - 2 7 21 - 1 48 44 - 2 13 21 0.16 -142 0 0 - 2 2 1 14 38 11.4 7 272 -7 - 1 55 42 - 2 8 20 - 1 49 42 - 2 14 20 0.17 -141 0 0 - 2 3 7 14 38 10.4 6 272 -7 - 1 56 48 - 2 9 26 - 1 50 48 - 2 15 26 0.17 -140 0 0 - 2 4 21 14 38 9.6 5 272 -6 - 1 58 2 - 2 10 39 - 1 52 2 - 2 16 40 0.17 -139 0 0 - 2 5 42 14 38 8.9 4 272 -5 - 1 59 23 - 2 12 1 - 1 53 23 - 2 18 1 0.17 -138 0 0 - 2 7 11 14 38 8.4 3 272 -4 - 2 0 52 - 2 13 29 - 1 54 52 - 2 19 30 0.18 -137 0 0 - 2 8 47 14 38 8.0 2 272 -3 - 2 2 28 - 2 15 6 - 1 56 28 - 2 21 6 0.19 -136 0 0 - 2 10 31 14 38 7.8 1 272 -2 - 2 4 12 - 2 16 49 - 1 58 12 - 2 22 50 0.22 -135 0 0 - 2 12 22 14 38 7.7 0 272 -1 - 2 6 3 - 2 18 41 - 2 0 3 - 2 24 41 0.97 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 459-004190 * constellation : Cetus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 03 06 17.8391 DE: +01 43 43.608 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 03 06 17.8391 DE: +01 43 43.606 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.300) * V mag [mag]: 10.0 * B mag [mag]: 10.3 * 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]: 2.09030 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): 0.022", 0.005", 69.229° remarks: * orbital elements for (3318)Blixen : Mean anomaly = 255.2446145503 deg Arg. of pericenter = 46.9601709409 deg Long. of node = 109.0343207568 deg Inclination = 11.5731459308 deg Eccentricity = 0.0477480283 Semimajor axis = 3.0104345977 AU Perihelion dist = 2.8666922812 AU Mag: H = 11.11, G = 0.15 Epoch of elements : MJD 60626.61530442 TDT (2024 Nov 12.6153) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,1.73,2024,11,12,14.767371,0.017753,-0.152332,-7.441321,-0.864314,0.000162,0.001648,0.000001,0.000000 133.1672,1.8267,-45.45,-17.93,False UCAC4 459-004190,3.10495532,1.7287801,10.33,10.01,9.84,0.1,0,,3.12672167,1.8267355,5.55,5.28,0,0,0 3318,Blixen,15.55,22.979,2.0903,0,0,-2.088,-3.63,,1.4,0 0,255.1285,2024,11,12,46.9602,109.0343,11.5731,0.04775,3.01043,2.86669,11.10,5.0,0.15 1.476,0.0217,0.0050,69,0.0072,Known errors,2.02,0,-1,-1 20241112_004190,60140.69 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org