IOTA/IOTA-ES occultation update for (12481) Streuvels / TYC 207-00411-1 event on 2024 Jan 16, 09:13 UT Visible from Summary ------- On 2024 Jan 16 UT, the 13.244 km diameter asteroid (12481) Streuvels will occult a 11.5 mag star in the constellation Cancer for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.67 mag to 18.12 mag (the magnitude of the asteroid) for at most 0.940 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: 91 * date and approx. time of event: 2024 Jan 16, 09:05 - 2024 Jan 16, 09:21 * geocentric midpoint of event [JD]: 2460325.88430758 * magnitude of target star: 11.45 * magnitude drop [mag]: 6.67 * estimated maximum duration [s]: 0.940 * Moon: 31 % sunlit, 119° distance * Sun: 165° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.51 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.004", 99°) * approx speed of asteroid's shadow [km/s]: 14.0618 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 207-00411-1 by 12481 Streuvels on 2024 Jan 16 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 137 0 0 5 19 38 9 20 54.8 0 83 -6 5 23 17 5 16 0 5 26 59 5 12 17 .... 138 0 0 5 26 41 9 20 54.7 1 83 -7 5 30 19 5 23 2 5 34 1 5 19 20 0.04 139 0 0 5 33 29 9 20 54.5 2 83 -8 5 37 8 5 29 51 5 40 50 5 26 9 0.07 140 0 0 5 40 5 9 20 54.1 3 83 -9 5 43 43 5 36 26 5 47 25 5 32 44 0.09 141 0 0 5 46 26 9 20 53.6 4 84 -10 5 50 4 5 42 48 5 53 46 5 39 6 0.09 142 0 0 5 52 34 9 20 52.9 5 84 -11 5 56 12 5 48 56 5 59 54 5 45 13 0.10 143 0 0 5 58 27 9 20 52.1 6 84 -12 6 2 5 5 54 49 6 5 47 5 51 7 0.10 144 0 0 6 4 7 9 20 51.2 7 84 -13 6 7 45 6 0 30 6 11 27 5 56 48 0.10 145 0 0 6 9 33 9 20 50.1 8 84 -14 6 13 11 6 5 56 6 16 53 6 2 14 0.10 146 0 0 6 14 45 9 20 48.9 9 84 -15 6 18 23 6 11 8 6 22 5 6 7 26 0.11 147 0 0 6 19 43 9 20 47.6 10 84 -16 6 23 21 6 16 6 6 27 3 6 12 24 0.11 148 0 0 6 24 27 9 20 46.1 11 84 -17 6 28 5 6 20 50 6 31 46 6 17 8 0.11 149 0 0 6 28 57 9 20 44.5 12 84 -18 6 32 35 6 25 20 6 36 16 6 21 38 0.11 150 0 0 6 33 13 9 20 42.8 13 85 -19 6 36 50 6 29 35 6 40 32 6 25 54 0.11 151 0 0 6 37 14 9 20 40.9 14 85 -20 6 40 51 6 33 37 6 44 33 6 29 55 0.11 152 0 0 6 41 1 9 20 38.9 15 85 -21 6 44 39 6 37 24 6 48 20 6 33 42 0.11 153 0 0 6 44 34 9 20 36.8 16 85 -22 6 48 11 6 40 57 6 51 53 6 37 15 0.11 154 0 0 6 47 53 9 20 34.6 17 85 -23 6 51 30 6 44 15 6 55 11 6 40 34 0.11 155 0 0 6 50 57 9 20 32.2 18 85 -24 6 54 34 6 47 20 6 58 15 6 43 38 0.11 156 0 0 6 53 47 9 20 29.7 19 85 -25 6 57 24 6 50 10 7 1 5 6 46 28 0.11 157 0 0 6 56 22 9 20 27.1 20 85 -26 6 59 59 6 52 45 7 3 40 6 49 4 0.11 158 0 0 6 58 43 9 20 24.3 21 85 -26 7 2 21 6 55 6 7 6 2 6 51 25 0.11 159 0 0 7 0 50 9 20 21.4 22 85 -27 7 4 27 6 57 13 7 8 8 6 53 32 0.11 160 0 0 7 2 43 9 20 18.4 23 86 -28 7 6 20 6 59 6 7 10 1 6 55 25 0.11 161 0 0 7 4 21 9 20 15.3 24 86 -29 7 7 58 7 0 44 7 11 39 6 57 3 0.11 162 0 0 7 5 44 9 20 12.1 25 86 -30 7 9 21 7 2 7 7 13 2 6 58 26 0.11 163 0 0 7 6 54 9 20 8.7 26 86 -31 7 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52 -18 6 9 -17 55 9 -18 9 52 0.13 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: TYC 207-00411-1 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 10 24.3612 DE: +06 52 30.633 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 10 24.3612 DE: +06 52 30.632 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.5 * B mag [mag]: 11.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (12481) Streuvels asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.12870 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#43 date of fit: 2023 Apr 27 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): 0.016", 0.004", 99.309° remarks: * orbital elements for (12481)Streuvels : Mean anomaly = 230.9370496042 deg Arg. of pericenter = 66.1526790035 deg Long. of node = 195.7720690538 deg Inclination = 9.1401632952 deg Eccentricity = 0.1564958266 Semimajor axis = 2.7796051395 AU Perihelion dist = 2.3446085356 AU Mag: H = 13.62, G = 0.15 Epoch of elements : MJD 60325.38430758 TDT (2024 Jan 16.3843) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#432023Apr27,0.94,2024,1,16,9.223382,-0.022916,-0.109734,-7.770961,1.614231,-0.000480,0.001478,0.000001,0.000000 -130.7381,6.8039,44.04,-21.00,False TYC 207-00411-1,8.17343367,6.8751760,11.80,11.45,11.26,0.0,0,,8.19517357,6.8038807,6.67,6.41,0,0,0 12481,Streuvels,18.12,13.244,2.1287,0,0,-2.155,6.67,,0.8,0 0,230.8553,2024,1,16,66.1527,195.7721,9.1402,0.15650,2.77961,2.34461,13.62,5.0,0.15 1.509,0.0157,0.0043,99,0.0044,Known errors,1.03,0,-1,-1 20240116_0411-1,60137.02 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:24 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org