IOTA/IOTA-ES occultation update for (1708) Polit / TYC 820-01540-1 event on 2024 Nov 18, 19:41 UT Visible from Summary ------- On 2024 Nov 18 UT, the 29.4217520868124 km diameter asteroid (1708) Polit will occult a 9.3 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.59 mag to 15.84 mag (the magnitude of the asteroid) for at most 1.890 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 Nov 18, 19:35 - 2024 Nov 18, 19:48 * geocentric midpoint of event [JD]: 2460633.32077396 * magnitude of target star: 9.25 * magnitude drop [mag]: 6.59 * estimated maximum duration [s]: 1.890 * Moon: 88 % sunlit, 45° distance * Sun: 96° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 32 * 1 sigma uncertainty interval [path widths]: +/- 0.21 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.002", 103°) * approx speed of asteroid's shadow [km/s]: 15.6609 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 820-01540-1 by 1708 Polit on 2024 Nov 18 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 59 0 0 3 32 10 19 35 36.6 1 82 -74 3 23 28 3 40 51 3 19 53 3 44 25 .... 60 0 0 3 39 49 19 35 36.7 2 82 -74 3 31 8 3 48 30 3 27 33 3 52 4 0.23 61 0 0 3 47 0 19 35 37.0 3 82 -74 3 38 19 3 55 40 3 34 44 3 59 14 0.30 62 0 0 3 53 40 19 35 37.4 4 83 -74 3 45 0 4 2 20 3 41 26 4 5 54 0.33 63 0 0 3 59 51 19 35 37.9 5 83 -74 3 51 11 4 8 30 3 47 37 4 12 4 0.34 64 0 0 4 5 32 19 35 38.6 6 83 -75 3 56 53 4 14 11 3 53 18 4 17 45 0.35 65 0 0 4 10 43 19 35 39.4 7 83 -74 4 2 4 4 19 22 3 58 30 4 22 56 0.36 66 0 0 4 15 24 19 35 40.4 8 83 -74 4 6 46 4 24 3 4 3 12 4 27 36 0.37 67 0 0 4 19 36 19 35 41.4 9 83 -74 4 10 57 4 28 14 4 7 23 4 31 47 0.37 68 0 0 4 23 17 19 35 42.6 10 83 -74 4 14 38 4 31 54 4 11 4 4 35 28 0.37 69 0 0 4 26 27 19 35 44.0 11 83 -74 4 17 49 4 35 5 4 14 15 4 38 38 0.38 70 0 0 4 29 8 19 35 45.5 12 83 -73 4 20 30 4 37 46 4 16 56 4 41 19 0.38 71 0 0 4 31 18 19 35 47.1 13 83 -73 4 22 40 4 39 56 4 19 7 4 43 29 0.38 72 0 0 4 32 58 19 35 48.8 14 83 -72 4 24 21 4 41 36 4 20 47 4 45 9 0.38 73 0 0 4 34 8 19 35 50.7 15 83 -72 4 25 30 4 42 45 4 21 57 4 46 18 0.38 74 0 0 4 34 47 19 35 52.7 16 83 -71 4 26 9 4 43 24 4 22 36 4 46 57 0.38 75 0 0 4 34 56 19 35 54.8 17 83 -71 4 26 18 4 43 33 4 22 44 4 47 6 0.39 76 0 0 4 34 34 19 35 57.0 18 83 -70 4 25 56 4 43 11 4 22 22 4 46 44 0.39 77 0 0 4 33 41 19 35 59.4 19 83 -69 4 25 3 4 42 18 4 21 29 4 45 52 0.39 78 0 0 4 32 18 19 36 1.9 20 83 -69 4 23 40 4 40 55 4 20 6 4 44 29 0.39 79 0 0 4 30 24 19 36 4.6 21 83 -68 4 21 45 4 39 2 4 18 12 4 42 35 0.39 80 0 0 4 27 59 19 36 7.4 22 83 -67 4 19 20 4 36 37 4 15 47 4 40 11 0.39 81 0 0 4 25 4 19 36 10.3 23 83 -66 4 16 25 4 33 42 4 12 51 4 37 15 0.39 82 0 0 4 21 37 19 36 13.3 24 83 -66 4 12 58 4 30 16 4 9 24 4 33 50 0.39 83 0 0 4 17 40 19 36 16.5 25 83 -65 4 9 1 4 26 19 4 5 26 4 29 53 0.39 84 0 0 4 13 12 19 36 19.7 26 83 -64 4 4 32 4 21 52 4 0 58 4 25 25 0.39 85 0 0 4 8 13 19 36 23.1 27 83 -63 3 59 33 4 16 53 3 55 58 4 20 27 0.39 86 0 0 4 2 43 19 36 26.7 28 83 -62 3 54 3 4 11 24 3 50 28 4 14 58 0.39 87 0 0 3 56 43 19 36 30.3 29 83 -61 3 48 2 4 5 23 3 44 27 4 8 58 0.40 88 0 0 3 50 11 19 36 34.1 30 83 -60 3 41 29 3 58 52 3 37 54 4 2 27 0.40 89 0 0 3 43 8 19 36 38.0 31 83 -59 3 34 26 3 51 50 3 30 50 3 55 25 0.40 90 0 0 3 35 34 19 36 42.0 32 83 -59 3 26 52 3 44 17 3 23 16 3 47 52 0.40 91 0 0 3 27 30 19 36 46.2 32 83 -58 3 18 46 3 36 13 3 15 10 3 39 48 0.40 92 0 0 3 18 54 19 36 50.5 33 83 -57 3 10 10 3 27 37 3 6 33 3 31 13 0.40 93 0 0 3 9 47 19 36 54.9 34 83 -56 3 1 2 3 18 31 2 57 26 3 22 7 0.40 94 0 0 3 0 9 19 36 59.4 35 83 -55 2 51 24 3 8 54 2 47 47 3 12 30 0.40 95 0 0 2 50 0 19 37 4.0 36 83 -54 2 41 14 2 58 46 2 37 37 3 2 23 0.40 96 0 0 2 39 21 19 37 8.8 37 82 -53 2 30 34 2 48 7 2 26 56 2 51 44 0.40 97 0 0 2 28 10 19 37 13.6 38 82 -52 2 19 22 2 36 57 2 15 44 2 40 35 0.40 98 0 0 2 16 29 19 37 18.6 39 82 -51 2 7 40 2 25 17 2 4 2 2 28 54 0.40 99 0 0 2 4 16 19 37 23.7 40 82 -50 1 55 27 2 13 5 1 51 48 2 16 43 0.40 100 0 0 1 51 33 19 37 28.9 41 81 -49 1 42 43 2 0 23 1 39 4 2 4 2 0.40 101 0 0 1 38 19 19 37 34.3 42 81 -48 1 29 28 1 47 10 1 25 48 1 50 49 0.40 102 0 0 1 24 35 19 37 39.7 43 81 -47 1 15 42 1 33 27 1 12 2 1 37 6 0.40 103 0 0 1 10 20 19 37 45.3 44 80 -46 1 1 26 1 19 13 0 57 46 1 22 52 0.40 104 0 0 0 55 34 19 37 50.9 45 80 -45 0 46 39 1 4 28 0 42 59 1 8 8 0.40 105 0 0 0 40 18 19 37 56.7 46 80 -44 0 31 23 0 49 13 0 27 41 0 52 54 0.40 106 0 0 0 24 32 19 38 2.6 47 79 -43 0 15 35 0 33 28 0 11 54 0 37 9 0.40 107 0 0 0 8 16 19 38 8.6 48 79 -42 - 0 0 42 0 17 13 - 0 4 24 0 20 55 0.40 108 0 0 - 0 8 30 19 38 14.7 49 78 -41 - 0 17 29 0 0 28 - 0 21 12 0 4 10 0.40 109 0 0 - 0 25 46 19 38 20.9 50 77 -40 - 0 34 47 - 0 16 47 - 0 38 29 - 0 13 4 0.40 110 0 0 - 0 43 32 19 38 27.2 51 77 -39 - 0 52 33 - 0 34 31 - 0 56 17 - 0 30 48 0.40 111 0 0 - 1 1 47 19 38 33.6 52 76 -37 - 1 10 50 - 0 52 45 - 1 14 33 - 0 49 1 0.40 112 0 0 - 1 20 31 19 38 40.1 53 75 -36 - 1 29 35 - 1 11 28 - 1 33 19 - 1 7 44 0.40 113 0 0 - 1 39 44 19 38 46.7 54 75 -35 - 1 48 49 - 1 30 40 - 1 52 34 - 1 26 55 0.40 114 0 0 - 1 59 26 19 38 53.4 55 74 -34 - 2 8 33 - 1 50 20 - 2 12 18 - 1 46 36 0.40 115 0 0 - 2 19 37 19 39 0.1 55 73 -33 - 2 28 44 - 2 10 30 - 2 32 30 - 2 6 44 0.40 116 0 0 - 2 40 15 19 39 7.0 56 72 -32 - 2 49 24 - 2 31 7 - 2 53 11 - 2 27 21 0.40 117 0 0 - 3 1 22 19 39 14.0 57 71 -31 - 3 10 32 - 2 52 12 - 3 14 19 - 2 48 26 0.40 118 0 0 - 3 22 56 19 39 21.0 58 70 -30 - 3 32 8 - 3 13 45 - 3 35 55 - 3 9 58 0.40 119 0 0 - 3 44 57 19 39 28.1 59 68 -29 - 3 54 10 - 3 35 45 - 3 57 58 - 3 31 57 0.40 120 0 0 - 4 7 25 19 39 35.3 60 67 -28 - 4 16 40 - 3 58 11 - 4 20 28 - 3 54 23 0.40 121 0 0 - 4 30 20 19 39 42.6 61 66 -27 - 4 39 35 - 4 21 5 - 4 43 25 - 4 17 16 0.40 122 0 0 - 4 53 40 19 39 49.9 61 64 -26 - 5 2 57 - 4 44 24 - 5 6 47 - 4 40 35 0.40 123 0 0 - 5 17 26 19 39 57.3 62 63 -25 - 5 26 45 - 5 8 9 - 5 30 35 - 5 4 19 0.40 124 0 0 - 5 41 38 19 40 4.8 63 61 -23 - 5 50 58 - 5 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17 16 -39 39 47 -39 13 26 0.39 -162 0 0 -39 46 18 19 47 38.9 23 302 49 -39 55 37 -39 37 0 -39 59 28 -39 33 10 0.39 -161 0 0 -40 5 37 19 47 41.3 22 301 50 -40 14 55 -39 56 20 -40 18 45 -39 52 31 0.39 -160 0 0 -40 24 32 19 47 43.6 21 301 50 -40 33 48 -40 15 16 -40 37 38 -40 11 27 0.39 -159 0 0 -40 43 3 19 47 45.8 20 300 51 -40 52 18 -40 33 49 -40 56 7 -40 30 0 0.39 -158 0 0 -41 1 10 19 47 48.0 19 299 52 -41 10 24 -40 51 57 -41 14 12 -40 48 9 0.39 -157 0 0 -41 18 54 19 47 50.0 18 299 52 -41 28 6 -41 9 42 -41 31 54 -41 5 55 0.39 -156 0 0 -41 36 14 19 47 51.9 18 298 53 -41 45 25 -41 27 3 -41 49 12 -41 23 16 0.39 -155 0 0 -41 53 10 19 47 53.7 17 297 53 -42 2 19 -41 44 0 -42 6 6 -41 40 14 0.39 -154 0 0 -42 9 42 19 47 55.4 16 297 54 -42 18 50 -42 0 34 -42 22 37 -41 56 48 0.39 -153 0 0 -42 25 51 19 47 57.1 15 296 54 -42 34 58 -42 16 44 -42 38 44 -42 12 59 0.39 -152 0 0 -42 41 36 19 47 58.6 15 295 55 -42 50 42 -42 32 30 -42 54 27 -42 28 46 0.39 -151 0 0 -42 56 58 19 48 0.1 14 294 55 -43 6 2 -42 47 53 -43 9 47 -42 44 9 0.39 -150 0 0 -43 11 56 19 48 1.4 13 294 56 -43 20 59 -43 2 53 -43 24 43 -42 59 9 0.39 -149 0 0 -43 26 31 19 48 2.7 12 293 56 -43 35 33 -43 17 29 -43 39 17 -43 13 46 0.39 -148 0 0 -43 40 43 19 48 3.9 11 292 57 -43 49 44 -43 31 42 -43 53 27 -43 27 59 0.40 -147 0 0 -43 54 31 19 48 5.0 11 292 57 -44 3 31 -43 45 32 -44 7 14 -43 41 50 0.40 -146 0 0 -44 7 57 19 48 6.1 10 291 58 -44 16 56 -43 58 59 -44 20 38 -43 55 17 0.40 -145 0 0 -44 21 0 19 48 7.0 9 290 58 -44 29 57 -44 12 3 -44 33 39 -44 8 21 0.40 -144 0 0 -44 33 40 19 48 7.9 8 289 58 -44 42 36 -44 24 44 -44 46 17 -44 21 3 0.40 -143 0 0 -44 45 57 19 48 8.7 8 289 59 -44 54 52 -44 37 2 -44 58 33 -44 33 22 0.40 -142 0 0 -44 57 51 19 48 9.4 7 288 59 -45 6 46 -44 48 58 -45 10 26 -44 45 18 0.40 -141 0 0 -45 9 23 19 48 10.0 6 287 59 -45 18 17 -45 0 31 -45 21 57 -44 56 51 0.40 -140 0 0 -45 20 33 19 48 10.6 5 287 60 -45 29 25 -45 11 42 -45 33 5 -45 8 3 0.40 -139 0 0 -45 31 21 19 48 11.1 5 286 60 -45 40 12 -45 22 30 -45 43 51 -45 18 52 0.41 -138 0 0 -45 41 46 19 48 11.5 4 285 60 -45 50 36 -45 32 57 -45 54 15 -45 29 18 0.41 -137 0 0 -45 51 50 19 48 11.8 3 285 60 -46 0 39 -45 43 1 -46 4 17 -45 39 23 0.41 -136 0 0 -46 1 31 19 48 12.1 3 284 61 -46 10 20 -45 52 43 -46 13 58 -45 49 6 0.42 -135 0 0 -46 10 51 19 48 12.3 2 283 61 -46 19 38 -46 2 4 -46 23 16 -45 58 27 0.43 -134 0 0 -46 19 49 19 48 12.5 1 282 61 -46 28 36 -46 11 3 -46 32 13 -46 7 26 0.45 -133 0 0 -46 28 25 19 48 12.5 0 282 61 -46 37 11 -46 19 40 -46 40 48 -46 16 4 0.55 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 820-01540-1 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 23 25.6633 DE: +07 48 11.565 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 23 25.6634 DE: +07 48 11.564 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.3 * B mag [mag]: 9.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1708) Polit asteroid class: approx. diameter [km]: 29 approx. diameter ["]: 0.023 distance from Earth [AU]: 1.74070 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 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", 102.635° remarks: * orbital elements for (1708)Polit : Mean anomaly = 16.3253919183 deg Arg. of pericenter = 248.5495139572 deg Long. of node = 192.1943983489 deg Inclination = 6.0444209239 deg Eccentricity = 0.3083023143 Semimajor axis = 2.9114569363 AU Perihelion dist = 2.0138480248 AU Mag: H = 11.80, G = 0.15 Epoch of elements : MJD 60632.82077333 TDT (2024 Nov 18.8208) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr24,1.89,2024,11,18,19.698575,-0.157390,-0.334602,7.999661,-3.760524,-0.005166,0.001766,0.000000,0.000000 147.3700,7.6977,-119.14,-19.48,False TYC 820-01540-1,9.39046200,7.8032126,9.84,9.25,8.93,0.1,0,,9.41253996,7.6977158,6.59,6.46,0,0,0 1708,Polit,15.84,29.548,1.7407,0,0,2.719,-19.00,,2.0,0 0,16.1626,2024,11,18,248.5495,192.1944,6.0444,0.30830,2.91146,2.01385,11.79,5.0,0.15 1.206,0.0197,0.0023,103,0.0048,Known errors,0.96,0,-1,-1 20241118_1540-1,60140.70 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org