IOTA/IOTA-ES occultation update for (308) Polyxo / TYC 6305-00788-1 event on 2024 Nov 26, 10:54 UT Visible from Summary ------- On 2024 Nov 26 UT, the 136.391447376774 km diameter asteroid (308) Polyxo will occult a 10.8 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 2.94 mag to 13.67 mag (the magnitude of the asteroid) for at most 3.480 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: 100 * date and approx. time of event: 2024 Nov 26, 10:52 - 2024 Nov 26, 10:57 * geocentric midpoint of event [JD]: 2460640.95477279 * magnitude of target star: 10.80 * magnitude drop [mag]: 2.94 * estimated maximum duration [s]: 3.480 * Moon: 20 % sunlit, 100° distance * Sun: 46° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 138 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 0.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.001", 85°) * approx speed of asteroid's shadow [km/s]: 39.2523 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6305-00788-1 by 308 Polyxo on 2024 Nov 26 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 - 32 0 0 -14 28 21 10 52 12.1 0 110 46 -15 8 15 .. .. .. -15 10 17 .. .. .. .... - 31 0 0 -14 49 5 10 52 12.1 1 109 47 -15 28 57 -14 9 17 -15 30 59 -14 7 16 0.20 - 30 0 0 -15 9 40 10 52 12.2 2 109 48 -15 49 31 -14 29 54 -15 51 33 -14 27 52 0.18 - 29 0 0 -15 30 7 10 52 12.3 3 109 49 -16 9 56 -14 50 22 -16 11 58 -14 48 21 0.18 - 28 0 0 -15 50 25 10 52 12.5 4 108 50 -16 30 13 -15 10 42 -16 32 15 -15 8 40 0.17 - 27 0 0 -16 10 34 10 52 12.8 5 108 51 -16 50 20 -15 30 53 -16 52 22 -15 28 51 0.17 - 26 0 0 -16 30 33 10 52 13.1 6 108 52 -17 10 17 -15 50 54 -17 12 19 -15 48 52 0.17 - 25 0 0 -16 50 22 10 52 13.4 7 108 53 -17 30 5 -16 10 45 -17 32 7 -16 8 43 0.17 - 24 0 0 -17 10 1 10 52 13.8 8 107 54 -17 49 42 -16 30 25 -17 51 44 -16 28 24 0.17 - 23 0 0 -17 29 29 10 52 14.3 9 107 55 -18 9 8 -16 49 55 -18 11 10 -16 47 54 0.17 - 22 0 0 -17 48 46 10 52 14.7 10 107 56 -18 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31 -11 40 29 0.17 127 0 0 -12 0 52 10 57 15.1 27 255 -18 -12 40 54 -11 20 55 -12 42 57 -11 18 53 0.17 128 0 0 -11 39 12 10 57 16.4 26 254 -19 -12 19 15 -10 59 15 -12 21 18 -10 57 13 0.17 129 0 0 -11 17 29 10 57 17.7 25 254 -20 -11 57 32 -10 37 31 -11 59 34 -10 35 28 0.17 130 0 0 -10 55 42 10 57 19.0 24 254 -21 -11 35 45 -10 15 43 -11 37 48 -10 13 41 0.17 131 0 0 -10 33 52 10 57 20.1 23 254 -22 -11 13 55 - 9 53 53 -11 15 58 - 9 51 51 0.17 132 0 0 -10 12 0 10 57 21.3 22 254 -23 -10 52 3 - 9 32 1 -10 54 6 - 9 29 58 0.17 133 0 0 - 9 50 6 10 57 22.4 21 253 -24 -10 30 9 - 9 10 7 -10 32 12 - 9 8 4 0.17 134 0 0 - 9 28 10 10 57 23.4 20 253 -25 -10 8 14 - 8 48 11 -10 10 17 - 8 46 9 0.17 135 0 0 - 9 6 14 10 57 24.4 19 253 -26 - 9 46 18 - 8 26 15 - 9 48 20 - 8 24 13 0.17 136 0 0 - 8 44 17 10 57 25.4 17 253 -27 - 9 24 21 - 8 4 19 - 9 26 24 - 8 2 17 0.18 137 0 0 - 8 22 21 10 57 26.2 16 253 -28 - 9 2 24 - 7 42 23 - 9 4 27 - 7 40 21 0.18 138 0 0 - 8 0 25 10 57 27.1 15 252 -29 - 8 40 28 - 7 20 28 - 8 42 31 - 7 18 25 0.18 139 0 0 - 7 38 31 10 57 27.9 14 252 -30 - 8 18 33 - 6 58 34 - 8 20 36 - 6 56 32 0.18 140 0 0 - 7 16 38 10 57 28.6 13 252 -31 - 7 56 40 - 6 36 42 - 7 58 43 - 6 34 40 0.18 141 0 0 - 6 54 48 10 57 29.2 12 252 -32 - 7 34 49 - 6 14 52 - 7 36 51 - 6 12 50 0.18 142 0 0 - 6 33 0 10 57 29.9 11 252 -33 - 7 13 0 - 5 53 6 - 7 15 3 - 5 51 3 0.18 143 0 0 - 6 11 16 10 57 30.4 10 252 -34 - 6 51 15 - 5 31 22 - 6 53 18 - 5 29 20 0.18 144 0 0 - 5 49 36 10 57 30.9 9 252 -35 - 6 29 33 - 5 9 43 - 6 31 36 - 5 7 41 0.19 145 0 0 - 5 27 59 10 57 31.4 8 252 -36 - 6 7 56 - 4 48 8 - 6 9 59 - 4 46 6 0.19 146 0 0 - 5 6 28 10 57 31.8 7 251 -37 - 5 46 24 - 4 26 37 - 5 48 26 - 4 24 35 0.19 147 0 0 - 4 45 2 10 57 32.1 6 251 -39 - 5 24 56 - 4 5 13 - 5 26 59 - 4 3 11 0.20 148 0 0 - 4 23 42 10 57 32.4 5 251 -40 - 5 3 34 - 3 43 54 - 5 5 37 - 3 41 52 0.21 149 0 0 - 4 2 28 10 57 32.6 4 251 -41 - 4 42 19 - 3 22 41 - 4 44 21 - 3 20 39 0.22 150 0 0 - 3 41 20 10 57 32.8 3 251 -42 - 4 21 10 - 3 1 35 - 4 23 12 - 2 59 34 0.24 151 0 0 - 3 20 20 10 57 32.9 2 251 -43 - 4 0 8 - 2 40 37 - 4 2 11 - 2 38 35 0.29 152 0 0 - 2 59 28 10 57 33.0 1 251 -44 - 3 39 14 - 2 19 46 - 3 41 16 - 2 17 45 0.54 Uncertainty in time = +/- 0 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6305-00788-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 25 48.2958 DE: -18 59 29.029 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 25 48.2958 DE: -18 59 29.029 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.8 * B mag [mag]: 11.4 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (308) Polyxo asteroid class: approx. diameter [km]: 136 approx. diameter ["]: 0.058 distance from Earth [AU]: 3.23400 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#111 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): 0.007", 0.001", 85.045° remarks: * orbital elements for (308)Polyxo : Mean anomaly = 11.0563318041 deg Arg. of pericenter = 112.2334425603 deg Long. of node = 181.5825473817 deg Inclination = 4.3626082952 deg Eccentricity = 0.0386140162 Semimajor axis = 2.7495203634 AU Perihelion dist = 2.6433503395 AU Mag: H = 8.16, G = 0.21 Epoch of elements : MJD 60640.45477255 TDT (2024 Nov 26.4548) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1112023Apr24,3.48,2024,11,26,10.914547,0.015959,-0.156707,22.029266,2.357767,0.004166,0.000835,-0.000001,0.000000 62.2278,-18.9430,13.14,-21.07,False TYC 6305-00788-1,19.43008222,-18.9913968,11.35,10.80,10.50,0.1,0,,19.45400058,-18.9430444,2.95,2.81,0,0,0 308,Polyxo,13.67,136.626,3.2340,0,0,4.222,6.42,,7.6,0 0,10.9580,2024,11,26,112.2334,181.5825,4.3626,0.03861,2.74952,2.64335,8.16,5.0,0.15 1.026,0.0073,0.0015,85,0.0015,Known errors,0.80,0,-1,-1 20241126_0788-1,60140.72 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org