IOTA/IOTA-ES occultation update for (4352) Kyoto / TYC 1975-00822-1 event on 2009 Feb 01, 09:26 UT Visible from Summary ------- On 2009 Feb 01 UT, the 15 km diameter asteroid (4352) Kyoto will occult a 10.2 mag star in the constellation Leo Minor for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.3 mag to 15.5 mag (the magnitude of the asteroid) for at most 1.3 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 10 * date and approx. time of event: 2009 Feb 01, 09:17 - 2009 Feb 01, 09:35 UT * magnitude of target star: 10.2 * magnitude drop [mag]: 5.3 * estimated maximum duration [s]: 1.3 * Moon: 33 % sunlit, 121° distance * Sun: 158° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 6.46 * 1 sigma uncertainty interval [seconds]: +/- 10.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .099 +/- .081) * 1 sigma uncertainty ellipse (major, minor, PA): ( .102", .077", 112° ) * approx speed of asteroid's shadow [km/s]: 11.2304 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1975-00822-1 by 4352 Kyoto on 2009 Feb 1 Centre Star Star Sun Path Limits Error Limits E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Longitude Longitude Longitude Longitude - 50 38 54 -15 0 0 9 17 23 15 305 0 - 50 31 49 - 50 45 57 - 48 59 43 - 52 16 32 - 52 0 54 -14 0 0 9 17 28 16 305 -2 - 51 53 57 - 52 7 51 - 50 23 28 - 53 36 57 - 53 21 1 -13 0 0 9 17 33 18 305 -3 - 53 14 11 - 53 27 52 - 51 45 9 - 54 55 37 - 54 39 25 -12 0 0 9 17 38 19 306 -5 - 54 32 41 - 54 46 10 - 53 4 58 - 56 12 42 - 55 56 15 -11 0 0 9 17 43 21 306 -6 - 55 49 36 - 56 2 54 - 54 23 6 - 57 28 21 - 57 11 39 -10 0 0 9 17 49 23 306 -8 - 57 5 5 - 57 18 13 - 55 39 40 - 58 42 40 - 58 25 45 - 9 0 0 9 17 55 24 306 -9 - 58 19 15 - 58 32 15 - 56 54 49 - 59 55 46 - 59 38 39 - 8 0 0 9 18 2 26 306 -10 - 59 32 13 - 59 45 5 - 58 8 41 - 61 7 48 - 60 50 29 - 7 0 0 9 18 8 27 306 -12 - 60 44 6 - 60 56 51 - 59 21 23 - 62 18 49 - 62 1 19 - 6 0 0 9 18 15 29 306 -13 - 61 55 0 - 62 7 38 - 60 33 0 - 63 28 57 - 63 11 16 - 5 0 0 9 18 23 30 306 -15 - 63 5 0 - 63 17 33 - 61 43 39 - 64 38 16 - 64 20 25 - 4 0 0 9 18 31 32 306 -16 - 64 14 12 - 64 26 39 - 62 53 25 - 65 46 51 - 65 28 51 - 3 0 0 9 18 38 33 306 -17 - 65 22 40 - 65 35 3 - 64 2 24 - 66 54 47 - 66 36 38 - 2 0 0 9 18 47 35 306 -19 - 66 30 29 - 66 42 48 - 65 10 40 - 68 2 8 - 67 43 52 - 1 0 0 9 18 55 36 306 -20 - 67 37 44 - 67 49 59 - 66 18 18 - 69 8 59 - 68 50 35 0 0 0 9 19 4 37 306 -21 - 68 44 28 - 68 56 41 - 67 25 23 - 70 15 24 - 69 56 52 1 0 0 9 19 13 39 306 -23 - 69 50 47 - 70 2 57 - 68 31 57 - 71 21 26 Latitude Latitude Latitude Latitude - 71 0 0 1 57 27 9 19 22 40 306 -24 2 3 0 1 51 55 3 14 43 0 40 30 - 72 0 0 2 52 18 9 19 31 42 306 -25 2 57 51 2 46 45 4 9 43 1 35 11 - 73 0 0 3 47 20 9 19 40 43 305 -26 3 52 53 3 41 46 5 4 54 2 30 4 - 74 0 0 4 42 31 9 19 49 44 305 -28 4 48 5 4 36 56 6 0 13 3 25 7 - 75 0 0 5 37 48 9 19 58 46 305 -29 5 43 23 5 32 13 6 55 37 4 20 18 - 76 0 0 6 33 10 9 20 8 47 305 -30 6 38 45 6 27 35 7 51 4 5 15 34 - 77 0 0 7 28 33 9 20 17 48 304 -31 7 34 8 7 22 57 8 46 32 6 10 52 - 78 0 0 8 23 54 9 20 27 49 304 -32 8 29 30 8 18 19 9 41 58 7 6 11 - 79 0 0 9 19 13 9 20 38 51 303 -33 9 24 49 9 13 37 10 37 18 8 1 27 - 80 0 0 10 14 25 9 20 48 52 303 -35 10 20 1 10 8 49 11 32 32 8 56 38 - 81 0 0 11 9 29 9 20 58 53 302 -36 11 15 5 11 3 53 12 27 36 9 51 41 - 82 0 0 12 4 21 9 21 9 55 302 -37 12 9 57 11 58 46 13 22 28 10 46 35 - 83 0 0 12 59 1 9 21 20 56 301 -38 13 4 37 12 53 25 14 17 6 11 41 16 - 84 0 0 13 53 24 9 21 30 57 301 -39 13 59 0 13 47 49 15 11 27 12 35 42 - 85 0 0 14 47 30 9 21 41 58 300 -40 14 53 5 14 41 55 16 5 29 13 29 52 - 86 0 0 15 41 15 9 21 52 60 299 -41 15 46 50 15 35 40 16 59 9 14 23 42 - 87 0 0 16 34 38 9 22 3 61 298 -42 16 40 12 16 29 3 17 52 26 15 17 11 - 88 0 0 17 27 36 9 22 15 62 297 -43 17 33 10 17 22 2 18 45 17 16 10 16 - 89 0 0 18 20 8 9 22 26 63 296 -44 18 25 41 18 14 34 19 37 41 17 2 55 - 90 0 0 19 12 11 9 22 37 64 295 -45 19 17 44 19 6 38 20 29 35 17 55 7 - 91 0 0 20 3 44 9 22 48 66 294 -46 20 9 16 19 58 12 21 20 58 18 46 50 - 92 0 0 20 54 44 9 23 0 67 293 -47 21 0 16 20 49 13 22 11 48 19 38 1 - 93 0 0 21 45 11 9 23 11 68 291 -48 21 50 42 21 39 41 23 2 4 20 28 40 - 94 0 0 22 35 3 9 23 22 69 290 -49 22 40 33 22 29 33 23 51 43 21 18 44 - 95 0 0 23 24 18 9 23 33 70 288 -50 23 29 47 23 18 49 24 40 44 22 8 12 - 96 0 0 24 12 55 9 23 45 71 286 -51 24 18 22 24 7 27 25 29 7 22 57 3 - 97 0 0 25 0 52 9 23 56 72 284 -51 25 6 19 24 55 25 26 16 50 23 45 15 - 98 0 0 25 48 9 9 24 7 73 282 -52 25 53 34 25 42 43 27 3 51 24 32 47 - 99 0 0 26 34 44 9 24 18 74 280 -53 26 40 8 26 29 19 27 50 10 25 19 38 -100 0 0 27 20 36 9 24 29 75 277 -54 27 26 0 27 15 13 28 35 45 26 5 47 -101 0 0 28 5 45 9 24 40 76 274 -54 28 11 7 28 0 24 29 20 37 26 51 14 -102 0 0 28 50 10 9 24 51 77 270 -55 28 55 31 28 44 50 30 4 44 27 35 56 -103 0 0 29 33 50 9 25 2 78 267 -56 29 39 10 29 28 31 30 48 5 28 19 55 -104 0 0 30 16 45 9 25 13 78 262 -56 30 22 3 30 11 27 31 30 41 29 3 8 -105 0 0 30 58 53 9 25 23 79 258 -57 31 4 10 30 53 37 32 12 30 29 45 36 -106 0 0 31 40 15 9 25 34 80 252 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Uncertainty in time = +/- 11 secs [Prediction of 2008 Nov 6.0] Data for the target star ------------------------ * name: TYC 1975-00822-1 * constellation : Leo Minor * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 10 24 14.3695 DE: +28 00 30.733 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .016 ) * V mag [mag]: 10.2 * B mag [mag]: 10.7 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4352) Kyoto approx. diameter [km]: 15 approx. diameter ["]: .012 distance from Earth [AU]: 1.66400 * orbital information: orbit source: Preston date of fit: 2008 Nov 05 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 448 number of rejected observations: 20 time covered by the observations: 1948 Dec 10 - 2008 Jan 13 1 sigma uncertainty ellipse (major, minor, PA): 0.099, 0.075, 113° remarks: * orbital elements for (4352) Kyoto : Mean anomaly = 62.33160685 deg Arg. of pericenter = 348.97895594 deg Long. of node = 68.67131993 deg Inclination = 11.09275836 deg Eccentricity = 0.19755497 Semimajor axis = 2.76108078 AU Perihelion dist = 2.21561555 AU Mag: H = 11.47, G = 0.15 Epoch of elements : MJD 54863.39300000 TDT (2009 Feb 01.393) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Feb 1 4352 Kyoto 9h 26.4m UT 10.2 10 24 14.370 28 0 30.73TYC 1975-00822-1 10.7 15.5 15 1.3 1.664 -2.077 19.12 -117.2735 28.003 41.79 -17.01 9.4407 0.08514 0.12191 -5.20342 3.61995 -0.00199 -0.00096 2000 61.6027052009 129.00000348.978956 68.671320 11.0927580.19755497 2.7610808 2.215615511.7 5.00.15 RATE 2.1482530 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.102 0.077 112 7.46 0.080 0 54776.5020090201_0822-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 06, 04:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org