IOTA/IOTA-ES occultation update for (3898) Curlewis / TYC 6842-00858-1 event on 2024 Mar 11, 21:04 UT Visible from Summary ------- On 2024 Mar 11 UT, the 16.448 km diameter asteroid (3898) Curlewis will occult a 11.5 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 7.58 mag to 19.12 mag (the magnitude of the asteroid) for at most 0.840 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: 95 * date and approx. time of event: 2024 Mar 11, 20:58 - 2024 Mar 11, 21:09 * geocentric midpoint of event [JD]: 2460381.37791025 * magnitude of target star: 11.54 * magnitude drop [mag]: 7.58 * estimated maximum duration [s]: 0.840 * Moon: 3 % sunlit, 102° distance * Sun: 81° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.44 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.003", 90°) * approx speed of asteroid's shadow [km/s]: 19.6932 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6842-00858-1 by 3898 Curlewis on 2024 Mar 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 51 0 0 -12 12 20 20 58 54.5 0 113 -74 -12 17 18 -12 7 21 -12 21 41 -12 2 59 .... 52 0 0 -12 37 50 20 58 54.6 1 113 -74 -12 42 49 -12 32 51 -12 47 11 -12 28 29 0.24 53 0 0 -13 3 19 20 58 54.8 2 113 -73 -13 8 18 -12 58 20 -13 12 40 -12 53 58 0.23 54 0 0 -13 28 46 20 58 55.1 3 113 -72 -13 33 45 -13 23 47 -13 38 7 -13 19 25 0.23 55 0 0 -13 54 10 20 58 55.5 5 112 -71 -13 59 9 -13 49 12 -14 3 31 -13 44 49 0.23 56 0 0 -14 19 31 20 58 56.1 6 112 -71 -14 24 30 -14 14 33 -14 28 52 -14 10 10 0.22 57 0 0 -14 44 48 20 58 56.7 7 112 -70 -14 49 47 -14 39 50 -14 54 9 -14 35 27 0.22 58 0 0 -15 10 0 20 58 57.5 8 112 -69 -15 14 59 -15 5 2 -15 19 21 -15 0 40 0.22 59 0 0 -15 35 8 20 58 58.4 9 111 -68 -15 40 6 -15 30 9 -15 44 28 -15 25 47 0.22 60 0 0 -16 0 9 20 58 59.4 10 111 -67 -16 5 7 -15 55 11 -16 9 29 -15 50 49 0.22 61 0 0 -16 25 4 20 59 0.5 11 111 -66 -16 30 2 -16 20 6 -16 34 24 -16 15 44 0.22 62 0 0 -16 49 52 20 59 1.7 12 111 -65 -16 54 50 -16 44 54 -16 59 12 -16 40 32 0.22 63 0 0 -17 14 32 20 59 3.0 13 110 -65 -17 19 30 -17 9 34 -17 23 52 -17 5 13 0.22 64 0 0 -17 39 4 20 59 4.4 14 110 -64 -17 44 2 -17 34 6 -17 48 24 -17 29 45 0.22 65 0 0 -18 3 27 20 59 5.9 15 110 -63 -18 8 25 -17 58 30 -18 12 46 -17 54 9 0.22 66 0 0 -18 27 41 20 59 7.5 16 109 -62 -18 32 39 -18 22 44 -18 37 0 -18 18 23 0.22 67 0 0 -18 51 45 20 59 9.2 17 109 -61 -18 56 42 -18 46 48 -19 1 4 -18 42 27 0.22 68 0 0 -19 15 39 20 59 11.0 18 109 -60 -19 20 36 -19 10 42 -19 24 57 -19 6 21 0.22 69 0 0 -19 39 22 20 59 12.9 19 108 -59 -19 44 18 -19 34 25 -19 48 39 -19 30 5 0.22 70 0 0 -20 2 53 20 59 14.9 20 108 -58 -20 7 49 -19 57 57 -20 12 10 -19 53 36 0.22 71 0 0 -20 26 12 20 59 17.0 21 107 -57 -20 31 8 -20 21 16 -20 35 28 -20 16 56 0.22 72 0 0 -20 49 19 20 59 19.2 22 107 -56 -20 54 14 -20 44 23 -20 58 34 -20 40 3 0.22 73 0 0 -21 12 12 20 59 21.5 23 107 -55 -21 17 8 -21 7 17 -21 21 27 -21 2 58 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52 48 -16 42 52 -16 57 10 -16 38 30 0.23 -138 0 0 -16 22 58 21 9 14.9 16 250 77 -16 27 56 -16 18 0 -16 32 18 -16 13 38 0.23 -137 0 0 -15 57 59 21 9 16.6 15 250 77 -16 2 57 -15 53 0 -16 7 19 -15 48 38 0.24 -136 0 0 -15 32 53 21 9 18.1 14 250 78 -15 37 52 -15 27 55 -15 42 14 -15 23 32 0.24 -135 0 0 -15 7 42 21 9 19.6 13 250 78 -15 12 40 -15 2 43 -15 17 3 -14 58 21 0.24 -134 0 0 -14 42 25 21 9 20.9 12 249 79 -14 47 24 -14 37 27 -14 51 47 -14 33 4 0.24 -133 0 0 -14 17 4 21 9 22.1 11 249 79 -14 22 3 -14 12 5 -14 26 26 -14 7 43 0.24 -132 0 0 -13 51 39 21 9 23.3 10 249 79 -13 56 38 -13 46 40 -14 1 1 -13 42 18 0.24 -131 0 0 -13 26 11 21 9 24.3 9 249 79 -13 31 10 -13 21 12 -13 35 32 -13 16 50 0.25 -130 0 0 -13 0 40 21 9 25.2 8 248 79 -13 5 39 -12 55 41 -13 10 1 -12 51 19 0.25 -129 0 0 -12 35 7 21 9 26.0 7 248 79 -12 40 6 -12 30 8 -12 44 28 -12 25 46 0.26 -128 0 0 -12 9 33 21 9 26.7 6 248 79 -12 14 31 -12 4 34 -12 18 54 -12 0 12 0.26 -127 0 0 -11 43 58 21 9 27.2 5 248 78 -11 48 56 -11 38 59 -11 53 19 -11 34 37 0.27 -126 0 0 -11 18 22 21 9 27.7 4 247 78 -11 23 21 -11 13 24 -11 27 44 -11 9 2 0.29 -125 0 0 -10 52 48 21 9 28.0 3 247 78 -10 57 46 -10 47 50 -11 2 9 -10 43 27 0.32 -124 0 0 -10 27 15 21 9 28.2 1 247 77 -10 32 13 -10 22 16 -10 36 35 -10 17 54 0.40 -123 0 0 -10 1 43 21 9 28.3 0 247 76 -10 6 42 - 9 56 45 -10 11 4 - 9 52 23 0.87 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: TYC 6842-00858-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 00 54.1626 DE: -22 49 21.103 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 00 54.1626 DE: -22 49 21.103 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.5 * B mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3898) Curlewis asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.006 distance from Earth [AU]: 3.50640 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#50 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): 0.015", 0.003", 89.5° remarks: * orbital elements for (3898)Curlewis : Mean anomaly = 225.0821847376 deg Arg. of pericenter = 215.8542651191 deg Long. of node = 184.1680757174 deg Inclination = 0.6591117846 deg Eccentricity = 0.1585322620 Semimajor axis = 3.1140270939 AU Perihelion dist = 2.6203533349 AU Mag: H = 12.81, G = 0.15 Epoch of elements : MJD 60380.87791013 TDT (2024 Mar 11.8779) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr24,0.84,2024,3,11,21.069846,0.004490,-0.205198,11.112984,0.232570,-0.005930,-0.000014,0.000000,0.000000 144.5301,-22.8242,-133.60,-3.26,False TYC 6842-00858-1,18.01504513,-22.8225287,11.67,11.54,11.47,0.0,0,,18.03932895,-22.8242436,7.58,7.20,0,0,0 3898,Curlewis,19.12,16.448,3.5064,0,0,2.016,0.58,,1.6,0 0,224.9247,2024,3,11,215.8543,184.1681,0.6591,0.15853,3.11403,2.62035,12.80,5.0,0.15 1.439,0.0153,0.0028,90,0.0029,Known errors,0.83,0,-1,-1 20240311_0858-1,60139.23 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org