IOTA/IOTA-ES occultation update for (29855) 1999 FN27 / TYC 713-00515-1 event on 2024 Dec 02, 01:20 UT Visible from Summary ------- On 2024 Dec 02 UT, the 8.09214373312201 km diameter asteroid (29855) 1999 FN27 will occult a 10.9 mag star in the constellation Orion for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.57 mag to 17.48 mag (the magnitude of the asteroid) for at most 0.730 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 02, 01:12 - 2024 Dec 02, 01:28 * geocentric midpoint of event [JD]: 2460646.55582862 * magnitude of target star: 10.91 * magnitude drop [mag]: 6.57 * estimated maximum duration [s]: 0.730 * Moon: 1 % sunlit, 166° distance * Sun: 164° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 10 * 1 sigma uncertainty interval [path widths]: +/- 0.21 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.001", 86°) * approx speed of asteroid's shadow [km/s]: 11.2989 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 713-00515-1 by 29855 1999 FN27 on 2024 Dec 2 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 - 89 0 0 -37 23 34 1 28 17.6 0 72 -5 -37 20 46 -37 26 22 -37 19 36 -37 27 31 .... - 88 0 0 -37 8 3 1 28 17.5 1 71 -6 -37 5 15 -37 10 51 -37 4 6 -37 12 1 0.25 - 87 0 0 -36 52 27 1 28 17.2 2 71 -7 -36 49 39 -36 55 15 -36 48 29 -36 56 25 0.43 - 86 0 0 -36 36 45 1 28 16.9 3 70 -8 -36 33 57 -36 39 33 -36 32 47 -36 40 43 0.50 - 85 0 0 -36 20 57 1 28 16.3 4 70 -9 -36 18 9 -36 23 45 -36 16 59 -36 24 55 0.54 - 84 0 0 -36 5 4 1 28 15.7 4 69 -9 -36 2 16 -36 7 53 -36 1 7 -36 9 2 0.56 - 83 0 0 -35 49 7 1 28 14.8 5 68 -10 -35 46 19 -35 51 55 -35 45 9 -35 53 5 0.58 - 82 0 0 -35 33 5 1 28 13.9 6 68 -11 -35 30 17 -35 35 53 -35 29 7 -35 37 3 0.59 - 81 0 0 -35 16 59 1 28 12.7 7 67 -12 -35 14 11 -35 19 47 -35 13 1 -35 20 57 0.60 - 80 0 0 -35 0 50 1 28 11.5 8 67 -13 -34 58 1 -35 3 38 -34 56 52 -35 4 48 0.60 - 79 0 0 -34 44 36 1 28 10.0 9 66 -13 -34 41 48 -34 47 25 -34 40 38 -34 48 35 0.61 - 78 0 0 -34 28 20 1 28 8.5 9 66 -14 -34 25 32 -34 31 8 -34 24 22 -34 32 18 0.61 - 77 0 0 -34 12 1 1 28 6.7 10 65 -15 -34 9 13 -34 14 49 -34 8 3 -34 15 59 0.62 - 76 0 0 -33 55 40 1 28 4.8 11 64 -16 -33 52 52 -33 58 28 -33 51 42 -33 59 38 0.62 - 75 0 0 -33 39 16 1 28 2.8 12 64 -17 -33 36 28 -33 42 5 -33 35 18 -33 43 14 0.62 - 74 0 0 -33 22 51 1 28 0.6 13 63 -17 -33 20 3 -33 25 39 -33 18 53 -33 26 49 0.62 - 73 0 0 -33 6 25 1 27 58.2 14 63 -18 -33 3 37 -33 9 13 -33 2 27 -33 10 23 0.63 - 72 0 0 -32 49 57 1 27 55.7 15 62 -19 -32 47 9 -32 52 45 -32 45 59 -32 53 55 0.63 - 71 0 0 -32 33 29 1 27 53.0 16 62 -20 -32 30 41 -32 36 17 -32 29 31 -32 37 27 0.63 - 70 0 0 -32 17 0 1 27 50.2 16 61 -21 -32 14 12 -32 19 48 -32 13 3 -32 20 58 0.63 - 69 0 0 -32 0 32 1 27 47.2 17 60 -21 -31 57 44 -32 3 20 -31 56 34 -32 4 30 0.63 - 68 0 0 -31 44 4 1 27 44.1 18 60 -22 -31 41 16 -31 46 52 -31 40 7 -31 48 2 0.63 - 67 0 0 -31 27 37 1 27 40.8 19 59 -23 -31 24 49 -31 30 25 -31 23 40 -31 31 35 0.63 - 66 0 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47 -21 29 13 -21 36 54 0.66 57 0 0 -21 44 28 1 13 3.3 18 294 -2 -21 41 45 -21 47 11 -21 40 37 -21 48 19 0.66 58 0 0 -21 56 5 1 12 59.9 17 294 -2 -21 53 22 -21 58 49 -21 52 15 -21 59 57 0.66 59 0 0 -22 7 57 1 12 56.8 16 293 -1 -22 5 14 -22 10 40 -22 4 6 -22 11 48 0.66 60 0 0 -22 20 2 1 12 53.7 16 293 0 -22 17 19 -22 22 46 -22 16 11 -22 23 54 0.67 61 0 0 -22 32 21 1 12 50.9 15 292 1 -22 29 37 -22 35 4 -22 28 29 -22 36 13 0.67 62 0 0 -22 44 52 1 12 48.2 14 292 2 -22 42 9 -22 47 36 -22 41 1 -22 48 44 0.67 63 0 0 -22 57 37 1 12 45.7 13 292 3 -22 54 53 -23 0 21 -22 53 45 -23 1 29 0.67 64 0 0 -23 10 34 1 12 43.4 12 291 4 -23 7 50 -23 13 18 -23 6 42 -23 14 27 0.67 65 0 0 -23 23 44 1 12 41.2 11 291 5 -23 21 0 -23 26 28 -23 19 51 -23 27 37 0.67 66 0 0 -23 37 6 1 12 39.2 10 290 6 -23 34 21 -23 39 50 -23 33 13 -23 40 59 0.67 67 0 0 -23 50 39 1 12 37.4 9 290 7 -23 47 55 -23 53 24 -23 46 46 -23 54 32 0.68 68 0 0 -24 4 25 1 12 35.8 8 289 8 -24 1 40 -24 7 9 -24 0 31 -24 8 18 0.68 69 0 0 -24 18 21 1 12 34.4 7 289 9 -24 15 36 -24 21 6 -24 14 28 -24 22 15 0.68 70 0 0 -24 32 29 1 12 33.1 6 289 10 -24 29 44 -24 35 14 -24 28 35 -24 36 23 0.69 71 0 0 -24 46 47 1 12 32.0 5 288 10 -24 44 2 -24 49 32 -24 42 53 -24 50 41 0.69 72 0 0 -25 1 16 1 12 31.1 4 288 11 -24 58 30 -25 4 1 -24 57 22 -25 5 10 0.70 73 0 0 -25 15 55 1 12 30.3 3 287 12 -25 13 9 -25 18 40 -25 12 0 -25 19 49 0.71 74 0 0 -25 30 43 1 12 29.8 3 287 13 -25 27 58 -25 33 29 -25 26 49 -25 34 38 0.73 75 0 0 -25 45 41 1 12 29.4 2 286 14 -25 42 56 -25 48 27 -25 41 47 -25 49 36 0.78 76 0 0 -26 0 49 1 12 29.2 1 286 15 -25 58 3 -26 3 35 -25 56 54 -26 4 44 0.95 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 713-00515-1 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 31 32.2901 DE: +14 05 51.154 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 31 32.2901 DE: +14 05 51.154 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.9 * B mag [mag]: 11.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (29855) 1999 FN27 asteroid class: approx. diameter [km]: 8 approx. diameter ["]: 0.006 distance from Earth [AU]: 1.73530 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#44 date of fit: 2023 Feb 09 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): 0.021", 0.001", 85.645° remarks: * orbital elements for (29855)1999 FN27 : Mean anomaly = 281.8555571486 deg Arg. of pericenter = 5.3532823011 deg Long. of node = 160.1147784084 deg Inclination = 5.9456888671 deg Eccentricity = 0.0797910634 Semimajor axis = 2.7248916922 AU Perihelion dist = 2.5074696864 AU Mag: H = 13.67, G = 0.15 Epoch of elements : MJD 60646.05582841 TDT (2024 Dec 02.0558) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#442023Feb09,0.73,2024,12,2,1.339887,0.055036,-0.537944,-6.344217,-0.649679,-0.001371,0.000859,0.000001,0.000000 -8.2394,14.1171,157.26,-22.00,False TYC 713-00515-1,5.52563613,14.0975427,11.82,10.91,10.42,0.1,0,,5.54957268,14.1170970,6.57,6.61,0,0,0 29855,1999 FN27,17.48,8.218,1.7353,0,0,-2.210,-3.29,,0.8,0 0,281.6242,2024,12,1,5.3533,160.1148,5.9457,0.07979,2.72489,2.50747,13.67,5.0,0.15 1.208,0.0213,0.0012,86,0.0014,Known errors,1.09,0,-1,-1 20241202_0515-1,60140.72 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:20 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org