IOTA/IOTA-ES occultation update for (11939) 1993 FH36 / TYC 747-01971-1 event on 2024 Dec 14, 08:07 UT Visible from Summary ------- On 2024 Dec 14 UT, the 13.32 km diameter asteroid (11939) 1993 FH36 will occult a 11.9 mag star in the constellation Monoceros for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.84 mag to 16.73 mag (the magnitude of the asteroid) for at most 1.490 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 Dec 14, 07:55 - 2024 Dec 14, 08:19 * geocentric midpoint of event [JD]: 2460658.83852292 * magnitude of target star: 11.90 * magnitude drop [mag]: 4.84 * estimated maximum duration [s]: 1.490 * Moon: 98 % sunlit, 39° distance * Sun: 156° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.25 * 1 sigma uncertainty interval [seconds]: +/- 3.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.030, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.030", 0.002", 91°) * approx speed of asteroid's shadow [km/s]: 8.9416 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 747-01971-1 by 11939 1993 FH36 on 2024 Dec 14 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 165 0 0 -10 0 4 8 19 16.4 0 82 -15 - 9 56 23 -10 3 45 - 9 54 34 -10 5 34 .... 166 0 0 - 9 51 42 8 19 16.3 1 82 -16 - 9 48 1 - 9 55 23 - 9 46 12 - 9 57 12 0.02 167 0 0 - 9 43 17 8 19 15.9 2 82 -17 - 9 39 37 - 9 46 58 - 9 37 47 - 9 48 47 0.07 168 0 0 - 9 34 50 8 19 15.4 3 82 -18 - 9 31 9 - 9 38 30 - 9 29 20 - 9 40 20 0.09 169 0 0 - 9 26 19 8 19 14.6 4 81 -19 - 9 22 39 - 9 30 0 - 9 20 50 - 9 31 50 0.10 170 0 0 - 9 17 47 8 19 13.6 5 81 -20 - 9 14 6 - 9 21 28 - 9 12 17 - 9 23 17 0.10 171 0 0 - 9 9 12 8 19 12.4 6 81 -21 - 9 5 31 - 9 12 53 - 9 3 42 - 9 14 42 0.11 172 0 0 - 9 0 35 8 19 11.0 7 81 -21 - 8 56 54 - 9 4 16 - 8 55 5 - 9 6 5 0.11 173 0 0 - 8 51 56 8 19 9.4 8 81 -22 - 8 48 15 - 8 55 37 - 8 46 26 - 8 57 26 0.11 174 0 0 - 8 43 16 8 19 7.5 9 81 -23 - 8 39 35 - 8 46 56 - 8 37 45 - 8 48 46 0.12 175 0 0 - 8 34 33 8 19 5.5 10 80 -24 - 8 30 52 - 8 38 14 - 8 29 3 - 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99 0 0 1 10 4 8 6 39.6 82 328 -58 1 13 42 1 6 25 1 15 31 1 4 37 0.12 - 98 0 0 1 12 34 8 6 27.8 82 322 -57 1 16 13 1 8 56 1 18 1 1 7 7 0.12 - 97 0 0 1 14 56 8 6 16.0 81 317 -57 1 18 35 1 11 18 1 20 23 1 9 30 0.12 - 96 0 0 1 17 10 8 6 4.2 80 313 -56 1 20 49 1 13 32 1 22 37 1 11 44 0.12 - 95 0 0 1 19 16 8 5 52.5 80 309 -55 1 22 54 1 15 37 1 24 43 1 13 49 0.12 - 94 0 0 1 21 13 8 5 40.7 79 306 -55 1 24 52 1 17 35 1 26 40 1 15 47 0.12 - 93 0 0 1 23 3 8 5 29.0 78 303 -54 1 26 41 1 19 24 1 28 29 1 17 36 0.12 - 92 0 0 1 24 44 8 5 17.4 77 301 -53 1 28 22 1 21 5 1 30 10 1 19 17 0.12 - 91 0 0 1 26 16 8 5 5.8 77 299 -52 1 29 55 1 22 38 1 31 43 1 20 50 0.12 - 90 0 0 1 27 41 8 4 54.2 76 297 -52 1 31 19 1 24 2 1 33 7 1 22 14 0.12 - 89 0 0 1 28 57 8 4 42.6 75 295 -51 1 32 35 1 25 18 1 34 23 1 23 30 0.12 - 88 0 0 1 30 4 8 4 31.1 74 294 -50 1 33 43 1 26 26 1 35 31 1 24 38 0.12 - 87 0 0 1 31 3 8 4 19.7 73 293 -49 1 34 42 1 27 25 1 36 30 1 25 37 0.12 - 86 0 0 1 31 54 8 4 8.3 72 291 -49 1 35 33 1 28 16 1 37 21 1 26 28 0.12 - 85 0 0 1 32 36 8 3 57.0 71 290 -48 1 36 15 1 28 58 1 38 3 1 27 10 0.12 - 84 0 0 1 33 10 8 3 45.7 70 289 -47 1 36 49 1 29 32 1 38 37 1 27 44 0.12 - 83 0 0 1 33 36 8 3 34.4 70 289 -46 1 37 14 1 29 57 1 39 2 1 28 9 0.12 - 82 0 0 1 33 52 8 3 23.3 69 288 -45 1 37 31 1 30 14 1 39 19 1 28 26 0.12 - 81 0 0 1 34 1 8 3 12.2 68 287 -45 1 37 39 1 30 22 1 39 27 1 28 34 0.12 - 80 0 0 1 34 1 8 3 1.1 67 287 -44 1 37 39 1 30 22 1 39 27 1 28 34 0.12 - 79 0 0 1 33 52 8 2 50.2 66 286 -43 1 37 30 1 30 14 1 39 18 1 28 25 0.12 - 78 0 0 1 33 35 8 2 39.3 65 285 -42 1 37 13 1 29 56 1 39 1 1 28 8 0.12 - 77 0 0 1 33 9 8 2 28.5 64 285 -41 1 36 47 1 29 31 1 38 35 1 27 42 0.12 - 76 0 0 1 32 35 8 2 17.8 63 284 -41 1 36 13 1 28 56 1 38 1 1 27 8 0.12 - 75 0 0 1 31 52 8 2 7.1 62 284 -40 1 35 30 1 28 13 1 37 18 1 26 25 0.12 - 74 0 0 1 31 0 8 1 56.6 61 284 -39 1 34 39 1 27 22 1 36 27 1 25 34 0.12 - 73 0 0 1 30 0 8 1 46.1 60 283 -38 1 33 39 1 26 22 1 35 27 1 24 34 0.12 - 72 0 0 1 28 52 8 1 35.7 59 283 -37 1 32 30 1 25 14 1 34 19 1 23 25 0.12 - 71 0 0 1 27 35 8 1 25.4 58 283 -36 1 31 13 1 23 57 1 33 2 1 22 8 0.12 - 70 0 0 1 26 10 8 1 15.2 58 282 -35 1 29 48 1 22 31 1 31 36 1 20 43 0.12 - 69 0 0 1 24 36 8 1 5.2 57 282 -35 1 28 14 1 20 57 1 30 2 1 19 9 0.12 - 68 0 0 1 22 53 8 0 55.2 56 282 -34 1 26 32 1 19 14 1 28 20 1 17 26 0.12 - 67 0 0 1 21 2 8 0 45.3 55 282 -33 1 24 41 1 17 23 1 26 29 1 15 35 0.12 - 66 0 0 1 19 3 8 0 35.5 54 282 -32 1 22 41 1 15 24 1 24 29 1 13 36 0.12 - 65 0 0 1 16 55 8 0 25.9 53 281 -31 1 20 33 1 13 16 1 22 21 1 11 28 0.12 - 64 0 0 1 14 38 8 0 16.3 52 281 -30 1 18 17 1 11 0 1 20 5 1 9 12 0.12 - 63 0 0 1 12 14 8 0 6.9 51 281 -29 1 15 52 1 8 35 1 17 40 1 6 47 0.12 - 62 0 0 1 9 41 7 59 57.6 50 281 -29 1 13 19 1 6 2 1 15 7 1 4 14 0.12 - 61 0 0 1 6 59 7 59 48.4 49 281 -28 1 10 38 1 3 20 1 12 26 1 1 32 0.12 - 60 0 0 1 4 9 7 59 39.4 48 281 -27 1 7 48 1 0 31 1 9 36 0 58 42 0.12 - 59 0 0 1 1 11 7 59 30.5 47 280 -26 1 4 50 0 57 32 1 6 38 0 55 44 0.12 - 58 0 0 0 58 5 7 59 21.7 46 280 -25 1 1 44 0 54 26 1 3 32 0 52 38 0.12 - 57 0 0 0 54 50 7 59 13.0 45 280 -24 0 58 29 0 51 11 1 0 17 0 49 23 0.12 - 56 0 0 0 51 27 7 59 4.5 44 280 -23 0 55 6 0 47 49 0 56 54 0 46 0 0.12 - 55 0 0 0 47 56 7 58 56.1 43 280 -22 0 51 35 0 44 17 0 53 23 0 42 29 0.12 - 54 0 0 0 44 17 7 58 47.9 42 280 -21 0 47 56 0 40 38 0 49 44 0 38 50 0.12 - 53 0 0 0 40 30 7 58 39.8 41 280 -20 0 44 9 0 36 51 0 45 57 0 35 3 0.12 - 52 0 0 0 36 35 7 58 31.8 40 280 -20 0 40 14 0 32 56 0 42 2 0 31 8 0.12 - 51 0 0 0 32 32 7 58 24.0 39 280 -19 0 36 11 0 28 53 0 37 59 0 27 4 0.12 - 50 0 0 0 28 20 7 58 16.4 38 280 -18 0 31 59 0 24 41 0 33 48 0 22 53 0.12 - 49 0 0 0 24 1 7 58 8.9 37 280 -17 0 27 40 0 20 22 0 29 29 0 18 34 0.12 - 48 0 0 0 19 34 7 58 1.5 37 280 -16 0 23 14 0 15 55 0 25 2 0 14 7 0.12 - 47 0 0 0 15 0 7 57 54.4 36 279 -15 0 18 39 0 11 21 0 20 27 0 9 32 0.13 - 46 0 0 0 10 17 7 57 47.3 35 279 -14 0 13 56 0 6 38 0 15 45 0 4 50 0.13 - 45 0 0 0 5 27 7 57 40.5 34 279 -13 0 9 6 0 1 48 0 10 55 - 0 0 1 0.13 - 44 0 0 0 0 29 7 57 33.8 33 279 -12 0 4 9 - 0 3 10 0 5 57 - 0 4 58 0.13 - 43 0 0 - 0 4 36 7 57 27.3 32 279 -11 - 0 0 57 - 0 8 15 0 0 52 - 0 10 4 0.13 - 42 0 0 - 0 9 49 7 57 20.9 31 279 -10 - 0 6 9 - 0 13 28 - 0 4 21 - 0 15 16 0.13 - 41 0 0 - 0 15 9 7 57 14.8 30 279 -9 - 0 11 29 - 0 18 48 - 0 9 41 - 0 20 37 0.13 - 40 0 0 - 0 20 36 7 57 8.8 29 279 -9 - 0 16 57 - 0 24 16 - 0 15 8 - 0 26 4 0.13 - 39 0 0 - 0 26 11 7 57 3.0 28 279 -8 - 0 22 32 - 0 29 51 - 0 20 43 - 0 31 39 0.13 - 38 0 0 - 0 31 53 7 56 57.3 27 279 -7 - 0 28 14 - 0 35 33 - 0 26 25 - 0 37 21 0.13 - 37 0 0 - 0 37 42 7 56 51.9 26 279 -6 - 0 34 3 - 0 41 22 - 0 32 14 - 0 43 10 0.13 - 36 0 0 - 0 43 38 7 56 46.6 25 279 -5 - 0 39 59 - 0 47 18 - 0 38 10 - 0 49 7 0.13 - 35 0 0 - 0 49 41 7 56 41.5 24 279 -4 - 0 46 2 - 0 53 21 - 0 44 13 - 0 55 10 0.13 - 34 0 0 - 0 55 51 7 56 36.6 23 279 -3 - 0 52 12 - 0 59 31 - 0 50 23 - 1 1 20 0.13 - 33 0 0 - 1 2 8 7 56 31.9 22 279 -2 - 0 58 28 - 1 5 48 - 0 56 40 - 1 7 37 0.13 - 32 0 0 - 1 8 31 7 56 27.4 21 279 -1 - 1 4 52 - 1 12 11 - 1 3 3 - 1 14 0 0.13 - 31 0 0 - 1 15 1 7 56 23.1 20 279 0 - 1 11 22 - 1 18 41 - 1 9 33 - 1 20 30 0.13 - 30 0 0 - 1 21 38 7 56 19.0 19 279 1 - 1 17 58 - 1 25 18 - 1 16 9 - 1 27 7 0.13 - 29 0 0 - 1 28 21 7 56 15.0 18 279 2 - 1 24 41 - 1 32 1 - 1 22 52 - 1 33 50 0.13 - 28 0 0 - 1 35 10 7 56 11.3 17 279 3 - 1 31 30 - 1 38 50 - 1 29 41 - 1 40 39 0.13 - 27 0 0 - 1 42 6 7 56 7.8 16 279 4 - 1 38 25 - 1 45 46 - 1 36 37 - 1 47 34 0.13 - 26 0 0 - 1 49 7 7 56 4.5 15 279 5 - 1 45 27 - 1 52 47 - 1 43 38 - 1 54 36 0.13 - 25 0 0 - 1 56 14 7 56 1.4 14 279 6 - 1 52 34 - 1 59 55 - 1 50 46 - 2 1 44 0.13 - 24 0 0 - 2 3 28 7 55 58.5 13 279 7 - 1 59 48 - 2 7 8 - 1 57 59 - 2 8 57 0.13 - 23 0 0 - 2 10 47 7 55 55.8 12 279 8 - 2 7 7 - 2 14 27 - 2 5 18 - 2 16 16 0.13 - 22 0 0 - 2 18 12 7 55 53.3 11 278 8 - 2 14 31 - 2 21 52 - 2 12 43 - 2 23 41 0.13 - 21 0 0 - 2 25 42 7 55 51.0 10 278 9 - 2 22 2 - 2 29 22 - 2 20 13 - 2 31 11 0.13 - 20 0 0 - 2 33 18 7 55 49.0 9 278 10 - 2 29 37 - 2 36 58 - 2 27 48 - 2 38 47 0.13 - 19 0 0 - 2 40 59 7 55 47.1 8 278 11 - 2 37 18 - 2 44 39 - 2 35 29 - 2 46 28 0.13 - 18 0 0 - 2 48 45 7 55 45.5 7 278 12 - 2 45 4 - 2 52 25 - 2 43 15 - 2 54 14 0.13 - 17 0 0 - 2 56 36 7 55 44.1 6 278 13 - 2 52 55 - 3 0 16 - 2 51 6 - 3 2 5 0.13 - 16 0 0 - 3 4 32 7 55 42.9 5 278 14 - 3 0 51 - 3 8 12 - 2 59 2 - 3 10 1 0.13 - 15 0 0 - 3 12 33 7 55 41.9 4 278 15 - 3 8 52 - 3 16 13 - 3 7 3 - 3 18 2 0.13 - 14 0 0 - 3 20 38 7 55 41.1 3 278 16 - 3 16 57 - 3 24 19 - 3 15 8 - 3 26 8 0.13 - 13 0 0 - 3 28 48 7 55 40.6 2 278 17 - 3 25 7 - 3 32 28 - 3 23 18 - 3 34 18 0.13 - 12 0 0 - 3 37 2 7 55 40.3 1 278 18 - 3 33 21 - 3 40 43 - 3 31 32 - 3 42 32 0.14 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 747-01971-1 * constellation : Monoceros * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 46 04.2062 DE: +07 53 02.559 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 46 04.2062 DE: +07 53 02.559 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (11939) 1993 FH36 asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.013 distance from Earth [AU]: 1.38110 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 date of fit: 2023 Apr 25 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): 0.030", 0.002", 91.429° remarks: * orbital elements for (11939)1993 FH36 : Mean anomaly = 45.6961929284 deg Arg. of pericenter = 213.3093668599 deg Long. of node = 178.6656676280 deg Inclination = 8.9708228970 deg Eccentricity = 0.1677876871 Semimajor axis = 2.5708112139 AU Perihelion dist = 2.1394607462 AU Mag: H = 13.56, G = 0.15 Epoch of elements : MJD 60658.33852466 TDT (2024 Dec 14.3385) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr25,1.49,2024,12,14,8.124550,0.006554,-0.120006,-5.039327,-0.276506,-0.001755,0.001553,0.000001,0.000000 -103.4982,7.8583,56.83,-23.24,False TYC 747-01971-1,6.76783504,7.8840442,12.15,11.90,11.77,0.0,0,,6.79075342,7.8582567,4.85,4.54,0,0,0 11939,1993 FH36,16.73,13.320,1.3811,0,0,-2.159,-1.76,,0.8,0 0,45.6152,2024,12,14,213.3094,178.6657,8.9708,0.16779,2.57081,2.13946,13.56,5.0,0.15 1.247,0.0303,0.0022,91,0.0033,Known errors,0.94,0,-1,-1 20241214_1971-1,60140.74 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org