IOTA/IOTA-ES occultation update for (4206) Verulamium / TYC 6215-00182-1 event on 2024 May 11, 12:06 UT Visible from Summary ------- On 2024 May 11 UT, the 8.562 km diameter asteroid (4206) Verulamium will occult a 11.6 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.95 mag to 16.57 mag (the magnitude of the asteroid) for at most 0.850 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 May 11, 11:57 - 2024 May 11, 12:15 * geocentric midpoint of event [JD]: 2460442.00449987 * magnitude of target star: 11.63 * magnitude drop [mag]: 4.95 * estimated maximum duration [s]: 0.850 * Moon: 14 % sunlit, 154° distance * Sun: 161° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 10 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 2.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.002", 98°) * approx speed of asteroid's shadow [km/s]: 10.0523 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6215-00182-1 by 4206 Verulamium on 2024 May 11 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 97 0 0 -19 4 25 12 15 33.9 0 113 -17 -19 1 29 -19 7 20 -18 59 47 -19 9 3 .... 98 0 0 -19 29 27 12 15 33.7 1 113 -18 -19 26 32 -19 32 23 -19 24 49 -19 34 6 0.48 99 0 0 -19 54 44 12 15 33.3 2 113 -19 -19 51 48 -19 57 41 -19 50 6 -19 59 23 0.52 100 0 0 -20 20 16 12 15 32.6 3 112 -20 -20 17 19 -20 23 12 -20 15 37 -20 24 55 0.54 101 0 0 -20 46 0 12 15 31.7 4 112 -21 -20 43 3 -20 48 57 -20 41 20 -20 50 40 0.54 102 0 0 -21 11 57 12 15 30.5 5 112 -22 -21 9 0 -21 14 54 -21 7 17 -21 16 37 0.55 103 0 0 -21 38 5 12 15 29.1 7 111 -23 -21 35 8 -21 41 3 -21 33 25 -21 42 46 0.55 104 0 0 -22 4 25 12 15 27.5 8 111 -24 -22 1 27 -22 7 23 -21 59 44 -22 9 6 0.56 105 0 0 -22 30 55 12 15 25.6 9 111 -25 -22 27 57 -22 33 53 -22 26 14 -22 35 37 0.56 106 0 0 -22 57 35 12 15 23.6 10 110 -26 -22 54 37 -23 0 33 -22 52 53 -23 2 17 0.56 107 0 0 -23 24 23 12 15 21.3 11 110 -26 -23 21 25 -23 27 22 -23 19 41 -23 29 6 0.56 108 0 0 -23 51 20 12 15 18.8 12 109 -27 -23 48 21 -23 54 19 -23 46 37 -23 56 3 0.56 109 0 0 -24 18 24 12 15 16.0 13 109 -28 -24 15 25 -24 21 23 -24 13 41 -24 23 8 0.56 110 0 0 -24 45 35 12 15 13.1 14 108 -29 -24 42 35 -24 48 34 -24 40 51 -24 50 19 0.57 111 0 0 -25 12 51 12 15 9.9 15 108 -30 -25 9 51 -25 15 51 -25 8 7 -25 17 35 0.57 112 0 0 -25 40 12 12 15 6.6 16 108 -31 -25 37 13 -25 43 12 -25 35 28 -25 44 57 0.57 113 0 0 -26 7 38 12 15 3.0 17 107 -32 -26 4 38 -26 10 38 -26 2 53 -26 12 23 0.57 114 0 0 -26 35 7 12 14 59.3 17 107 -33 -26 32 7 -26 38 8 -26 30 22 -26 39 53 0.57 115 0 0 -27 2 39 12 14 55.3 18 106 -34 -26 59 39 -27 5 40 -26 57 54 -27 7 25 0.57 116 0 0 -27 30 13 12 14 51.2 19 106 -35 -27 27 13 -27 33 14 -27 25 27 -27 34 59 0.57 117 0 0 -27 57 48 12 14 46.8 20 105 -36 -27 54 48 -28 0 49 -27 53 2 -28 2 35 0.57 118 0 0 -28 25 24 12 14 42.3 21 104 -37 -28 22 23 -28 28 25 -28 20 38 -28 30 11 0.57 119 0 0 -28 53 0 12 14 37.6 22 104 -38 -28 49 58 -28 56 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19 0.63 - 60 0 0 -40 46 56 11 57 29.1 6 246 9 -40 43 55 -40 49 57 -40 42 9 -40 51 42 0.64 - 59 0 0 -40 23 0 11 57 28.0 6 246 10 -40 19 59 -40 26 2 -40 18 14 -40 27 47 0.65 - 58 0 0 -39 58 47 11 57 26.9 5 245 11 -39 55 46 -40 1 49 -39 54 0 -40 3 35 0.67 - 57 0 0 -39 34 17 11 57 26.1 4 244 12 -39 31 15 -39 37 19 -39 29 30 -39 39 5 0.69 - 56 0 0 -39 9 30 11 57 25.4 3 244 13 -39 6 28 -39 12 32 -39 4 42 -39 14 18 0.72 - 55 0 0 -38 44 26 11 57 24.8 2 243 14 -38 41 24 -38 47 29 -38 39 38 -38 49 15 0.78 - 54 0 0 -38 19 7 11 57 24.5 1 243 14 -38 16 5 -38 22 9 -38 14 19 -38 23 56 0.92 - 53 0 0 -37 53 32 11 57 24.3 0 242 15 -37 50 29 -37 56 34 -37 48 43 -37 58 21 1.75 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: TYC 6215-00182-1 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 31 44.8150 DE: -22 06 00.150 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 31 44.8150 DE: -22 06 00.151 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 11.6 * B mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4206) Verulamium asteroid class: approx. diameter [km]: 9 approx. diameter ["]: 0.006 distance from Earth [AU]: 1.84380 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#59 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): 0.020", 0.002", 98.4° remarks: * orbital elements for (4206)Verulamium : Mean anomaly = 327.8864533352 deg Arg. of pericenter = 26.5964266653 deg Long. of node = 249.6742421930 deg Inclination = 1.1696427075 deg Eccentricity = 0.0179127346 Semimajor axis = 2.8624641198 AU Perihelion dist = 2.8111895597 AU Mag: H = 12.50, G = 0.15 Epoch of elements : MJD 60441.50450025 TDT (2024 May 11.5045) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#592023Apr24,0.85,2024,5,11,12.107997,-0.091842,-0.502595,-5.581357,1.020096,-0.001768,0.000280,0.000001,0.000000 -163.0845,-22.1534,-2.52,18.08,False TYC 6215-00182-1,16.52911526,-22.1000418,12.32,11.63,11.26,0.0,0,,16.55358668,-22.1533686,4.95,4.87,0,0,0 4206,Verulamium,16.57,8.562,1.8438,0,0,-1.916,4.87,,0.8,0 0,327.7838,2024,5,11,26.5964,249.6742,1.1696,0.01791,2.86246,2.81119,12.49,5.0,0.15 1.291,0.0203,0.0017,98,0.0019,Known errors,1.78,0,-1,-1 20240511_0182-1,60139.34 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 08:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org