IOTA/IOTA-ES occultation update for (586) Thekla / TYC 5805-00518-1 event on 2009 Jun 02, 09:33 UT Visible from Summary ------- On 2009 Jun 02 UT, the 82 km diameter asteroid (586) Thekla will occult a 11.1 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.8 mag to 14.9 mag (the magnitude of the asteroid) for at most 9.5 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: 74 * date and approx. time of event: 2009 Jun 02, 09:21 - 2009 Jun 02, 09:36 UT * magnitude of target star: 11.1 * magnitude drop [mag]: 3.8 * estimated maximum duration [s]: 9.5 * Moon: 73 % sunlit, 139° distance * Sun: 104° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 82 * 1 sigma uncertainty interval [path widths]: +/- 0.77 * 1 sigma uncertainty interval [seconds]: +/- 7.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .034 +/- .031) * 1 sigma uncertainty ellipse (major, minor, PA): ( .034", .031", 83° ) * approx speed of asteroid's shadow [km/s]: 8.6989 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5805-00518-1 by 586 Thekla on 2009 Jun 2 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 ' " Latitude Latitude Latitude Latitude -155 0 0 -22 18 25 9 21 3 1 101 -77 -22 41 3 -21 55 46 -23 15 54 -21 20 52 -154 0 0 -22 28 56 9 21 3 2 101 -78 -22 51 33 -22 6 19 -23 26 21 -21 31 29 -153 0 0 -22 39 2 9 21 3 3 100 -79 -23 1 36 -22 16 26 -23 36 22 -21 41 39 -152 0 0 -22 48 40 9 21 4 4 100 -79 -23 11 13 -22 26 7 -23 45 56 -21 51 22 -151 0 0 -22 57 53 9 21 5 4 99 -80 -23 20 24 -22 35 21 -23 55 4 -22 0 39 -150 0 0 -23 6 39 9 21 6 5 99 -81 -23 29 8 -22 44 9 -24 3 46 -22 9 29 -149 0 0 -23 14 58 9 21 7 6 99 -82 -23 37 26 -22 52 30 -24 12 1 -22 17 52 -148 0 0 -23 22 51 9 21 8 7 98 -83 -23 45 17 -23 0 24 -24 19 50 -22 25 48 -147 0 0 -23 30 17 9 21 10 8 98 -84 -23 52 42 -23 7 51 -24 27 13 -22 33 18 -146 0 0 -23 37 16 9 21 12 9 97 -85 -23 59 40 -23 14 52 -24 34 9 -22 40 21 -145 0 0 -23 43 49 9 21 14 10 97 -85 -24 6 11 -23 21 26 -24 40 38 -22 46 56 -144 0 0 -23 49 54 9 21 16 11 97 -86 -24 12 16 -23 27 33 -24 46 41 -22 53 5 -143 0 0 -23 55 33 9 21 18 12 96 -87 -24 17 54 -23 33 13 -24 52 17 -22 58 47 -142 0 0 -24 0 45 9 21 21 13 96 -87 -24 23 5 -23 38 26 -24 57 26 -23 4 1 -141 0 0 -24 5 30 9 21 24 14 95 -87 -24 27 49 -23 43 11 -25 2 9 -23 8 49 -140 0 0 -24 9 48 9 21 27 15 95 -87 -24 32 6 -23 47 30 -25 6 25 -23 13 9 -139 0 0 -24 13 39 9 21 30 16 95 -87 -24 35 56 -23 51 22 -25 10 14 -23 17 1 -138 0 0 -24 17 3 9 21 33 17 94 -86 -24 39 19 -23 54 46 -25 13 36 -23 20 27 -137 0 0 -24 20 0 9 21 37 17 94 -85 -24 42 15 -23 57 44 -25 16 31 -23 23 25 -136 0 0 -24 22 29 9 21 40 18 93 -85 -24 44 44 -24 0 14 -25 19 0 -23 25 56 -135 0 0 -24 24 31 9 21 44 19 93 -84 -24 46 46 -24 2 16 -25 21 1 -23 27 59 -134 0 0 -24 26 6 9 21 48 20 93 -83 -24 48 21 -24 3 51 -25 22 35 -23 29 35 -133 0 0 -24 27 14 9 21 52 21 92 -82 -24 49 28 -24 4 59 -25 23 42 -23 30 43 -132 0 0 -24 27 54 9 21 57 22 92 -81 -24 50 8 -24 5 39 -25 24 22 -23 31 23 -131 0 0 -24 28 7 9 22 1 23 91 -80 -24 50 21 -24 5 52 -25 24 34 -23 31 36 -130 0 0 -24 27 52 9 22 6 24 91 -79 -24 50 6 -24 5 37 -25 24 20 -23 31 21 -129 0 0 -24 27 9 9 22 11 25 90 -79 -24 49 24 -24 4 55 -25 23 38 -23 30 38 -128 0 0 -24 25 59 9 22 16 26 90 -78 -24 48 14 -24 3 44 -25 22 28 -23 29 27 -127 0 0 -24 24 21 9 22 21 27 90 -77 -24 46 36 -24 2 6 -25 20 51 -23 27 48 -126 0 0 -24 22 16 9 22 27 28 89 -76 -24 44 31 -24 0 0 -25 18 47 -23 25 41 -125 0 0 -24 19 42 9 22 32 29 89 -75 -24 41 58 -23 57 26 -25 16 15 -23 23 6 -124 0 0 -24 16 41 9 22 38 30 88 -74 -24 38 57 -23 54 23 -25 13 15 -23 20 3 -123 0 0 -24 13 11 9 22 44 31 88 -73 -24 35 28 -23 50 53 -25 9 47 -23 16 32 -122 0 0 -24 9 13 9 22 50 31 88 -72 -24 31 32 -23 46 55 -25 5 52 -23 12 32 -121 0 0 -24 4 48 9 22 57 32 87 -71 -24 27 7 -23 42 28 -25 1 28 -23 8 4 -120 0 0 -23 59 54 9 23 3 33 87 -70 -24 22 14 -23 37 33 -24 56 37 -23 3 7 -119 0 0 -23 54 31 9 23 10 34 86 -69 -24 16 53 -23 32 9 -24 51 17 -22 57 42 -118 0 0 -23 48 41 9 23 17 35 86 -68 -24 11 3 -23 26 18 -24 45 30 -22 51 48 -117 0 0 -23 42 21 9 23 24 36 86 -67 -24 4 45 -23 19 57 -24 39 14 -22 45 25 -116 0 0 -23 35 34 9 23 31 37 85 -67 -23 57 59 -23 13 8 -24 32 30 -22 38 34 -115 0 0 -23 28 17 9 23 39 38 85 -66 -23 50 44 -23 5 50 -24 25 17 -22 31 14 -114 0 0 -23 20 32 9 23 46 39 85 -65 -23 43 1 -22 58 3 -24 17 36 -22 23 24 -113 0 0 -23 12 18 9 23 54 40 84 -64 -23 34 48 -22 49 47 -24 9 27 -22 15 6 -112 0 0 -23 3 35 9 24 2 41 84 -63 -23 26 7 -22 41 3 -24 0 48 -22 6 19 -111 0 0 -22 54 24 9 24 10 42 83 -62 -23 16 57 -22 31 49 -23 51 41 -21 57 2 -110 0 0 -22 44 43 9 24 19 43 83 -61 -23 7 19 -22 22 6 -23 42 5 -21 47 16 -109 0 0 -22 34 33 9 24 27 44 83 -60 -22 57 11 -22 11 54 -23 32 1 -21 37 1 -108 0 0 -22 23 53 9 24 36 45 82 -59 -22 46 34 -22 1 13 -23 21 27 -21 26 16 -107 0 0 -22 12 45 9 24 45 46 82 -58 -22 35 27 -21 50 2 -23 10 24 -21 15 2 -106 0 0 -22 1 7 9 24 54 47 82 -57 -22 23 52 -21 38 22 -22 58 53 -21 3 18 -105 0 0 -21 49 0 9 25 3 48 81 -56 -22 11 47 -21 26 12 -22 46 52 -20 51 5 -104 0 0 -21 36 23 9 25 13 49 81 -55 -21 59 13 -21 13 33 -22 34 21 -20 38 22 -103 0 0 -21 23 17 9 25 22 50 81 -54 -21 46 10 -21 0 24 -22 21 22 -20 25 9 -102 0 0 -21 9 42 9 25 32 51 80 -53 -21 32 37 -20 46 46 -22 7 53 -20 11 26 -101 0 0 -20 55 36 9 25 42 52 80 -52 -21 18 34 -20 32 38 -21 53 55 -19 57 14 -100 0 0 -20 41 1 9 25 52 53 80 -51 -21 4 2 -20 18 0 -21 39 27 -19 42 32 - 99 0 0 -20 25 57 9 26 3 54 80 -50 -20 49 0 -20 2 53 -21 24 30 -19 27 20 - 98 0 0 -20 10 22 9 26 13 55 79 -49 -20 33 29 -19 47 15 -21 9 3 -19 11 38 - 97 0 0 -19 54 18 9 26 24 56 79 -48 -20 17 28 -19 31 8 -20 53 6 -18 55 26 - 96 0 0 -19 37 45 9 26 35 57 79 -47 -20 0 57 -19 14 32 -20 36 41 -18 38 45 - 95 0 0 -19 20 41 9 26 46 58 79 -46 -19 43 57 -18 57 25 -20 19 45 -18 21 33 - 94 0 0 -19 3 8 9 26 57 59 79 -45 -19 26 27 -18 39 49 -20 2 21 -18 3 52 - 93 0 0 -18 45 6 9 27 9 60 78 -44 -19 8 28 -18 21 43 -19 44 26 -17 45 41 - 92 0 0 -18 26 34 9 27 20 61 78 -43 -18 49 59 -18 3 7 -19 26 3 -17 27 0 - 91 0 0 -18 7 32 9 27 32 62 78 -42 -18 31 1 -17 44 2 -19 7 10 -17 7 50 - 90 0 0 -17 48 1 9 27 44 63 78 -41 -18 11 34 -17 24 28 -18 47 47 -16 48 10 - 89 0 0 -17 28 1 9 27 56 64 78 -40 -17 51 37 -17 4 24 -18 27 56 -16 28 1 - 88 0 0 -17 7 31 9 28 8 65 78 -39 -17 31 11 -16 43 51 -18 7 35 -16 7 23 - 87 0 0 -16 46 33 9 28 21 66 78 -38 -17 10 16 -16 22 49 -17 46 46 -15 46 15 - 86 0 0 -16 25 5 9 28 33 67 78 -36 -16 48 52 -16 1 18 -17 25 27 -15 24 39 - 85 0 0 -16 3 9 9 28 46 68 78 -35 -16 26 59 -15 39 19 -17 3 40 -15 2 34 - 84 0 0 -15 40 45 9 28 59 69 78 -34 -16 4 38 -15 16 50 -16 41 25 -14 40 0 - 83 0 0 -15 17 52 9 29 12 70 78 -33 -15 41 49 -14 53 54 -16 18 41 -14 16 58 - 82 0 0 -14 54 31 9 29 25 71 78 -32 -15 18 32 -14 30 30 -15 55 30 -13 53 28 - 81 0 0 -14 30 43 9 29 38 73 79 -31 -14 54 47 -14 6 37 -15 31 50 -13 29 30 - 80 0 0 -14 6 27 9 29 52 74 79 -30 -14 30 35 -13 42 18 -15 7 44 -13 5 5 - 79 0 0 -13 41 44 9 30 6 75 79 -29 -14 5 55 -13 17 31 -14 43 10 -12 40 13 - 78 0 0 -13 16 34 9 30 19 76 80 -28 -13 40 49 -12 52 18 -14 18 9 -12 14 54 - 77 0 0 -12 50 58 9 30 33 77 81 -27 -13 15 17 -12 26 38 -13 52 42 -11 49 9 - 76 0 0 -12 24 56 9 30 47 78 82 -26 -12 49 18 -12 0 33 -13 26 49 -11 22 58 - 75 0 0 -11 58 29 9 31 1 79 83 -24 -12 22 55 -11 34 2 -13 0 31 -10 56 22 - 74 0 0 -11 31 36 9 31 16 80 85 -23 -11 56 6 -11 7 6 -12 33 47 -10 29 21 - 73 0 0 -11 4 20 9 31 30 81 87 -22 -11 28 52 -10 39 46 -12 6 39 -10 1 55 - 72 0 0 -10 36 39 9 31 44 82 90 -21 -11 1 15 -10 12 2 -11 39 7 - 9 34 6 - 71 0 0 -10 8 35 9 31 59 83 93 -20 -10 33 14 - 9 43 55 -11 11 12 - 9 5 54 - 70 0 0 - 9 40 8 9 32 13 84 98 -19 -10 4 51 - 9 15 25 -10 42 53 - 8 37 19 - 69 0 0 - 9 11 20 9 32 28 85 106 -18 - 9 36 6 - 8 46 33 -10 14 12 - 8 8 22 - 68 0 0 - 8 42 10 9 32 43 86 117 -16 - 9 6 59 - 8 17 20 - 9 45 10 - 7 39 5 - 67 0 0 - 8 12 39 9 32 58 87 132 -15 - 8 37 31 - 7 47 47 - 9 15 47 - 7 9 26 - 66 0 0 - 7 42 49 9 33 13 87 152 -14 - 8 7 43 - 7 17 53 - 8 46 4 - 6 39 29 - 65 0 0 - 7 12 39 9 33 27 87 173 -13 - 7 37 36 - 6 47 41 - 8 16 1 - 6 9 12 - 64 0 0 - 6 42 11 9 33 42 86 190 -12 - 7 7 11 - 6 17 10 - 7 45 40 - 5 38 37 - 63 0 0 - 6 11 26 9 33 57 85 202 -11 - 6 36 28 - 5 46 22 - 7 15 1 - 5 7 45 - 62 0 0 - 5 40 24 9 34 12 84 210 -9 - 6 5 29 - 5 15 18 - 6 44 6 - 4 36 37 - 61 0 0 - 5 9 6 9 34 27 83 216 -8 - 5 34 13 - 4 43 58 - 6 12 54 - 4 5 14 - 60 0 0 - 4 37 34 9 34 42 82 220 -7 - 5 2 43 - 4 12 23 - 5 41 27 - 3 33 36 - 59 0 0 - 4 5 48 9 34 57 81 223 -6 - 4 30 59 - 3 40 35 - 5 9 46 - 3 1 45 - 58 0 0 - 3 33 49 9 35 12 80 225 -5 - 3 59 2 - 3 8 34 - 4 37 52 - 2 29 41 - 57 0 0 - 3 1 38 9 35 27 79 227 -4 - 3 26 53 - 2 36 22 - 4 5 46 - 1 57 26 - 56 0 0 - 2 29 16 9 35 42 78 229 -2 - 2 54 33 - 2 3 59 - 3 33 28 - 1 25 0 - 55 0 0 - 1 56 45 9 35 57 77 230 -1 - 2 22 4 - 1 31 26 - 3 1 1 - 0 52 25 - 54 0 0 - 1 24 5 9 36 12 76 231 0 - 1 49 25 - 0 58 45 - 2 28 25 - 0 19 42 Uncertainty in time = +/- 8 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 5805-00518-1 * constellation : Capricornus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 58 26.0682 DE: -10 25 50.800 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .028, .028 ) * V mag [mag]: 11.1 * B mag [mag]: 12.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (586) Thekla approx. diameter [km]: 82 approx. diameter ["]: .040 distance from Earth [AU]: 2.83000 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1012 number of rejected observations: 130 time covered by the observations: 1906 Mar 14 - 2008 Mar 12 1 sigma uncertainty ellipse (major, minor, PA): 0.020, 0.013, 70° remarks: * orbital elements for (586) Thekla : Mean anomaly = 198.18873033 deg Arg. of pericenter = 245.09615015 deg Long. of node = 229.02690243 deg Inclination = 1.61817443 deg Eccentricity = 0.06044076 Semimajor axis = 3.04942565 AU Perihelion dist = 2.86511604 AU Mag: H = 9.30, G = 0.15 Epoch of elements : MJD 54984.39800000 TDT (2009 Jun 02.398) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jun 2 586 Thekla 9h 33.3m UT 11.1 21 58 26.068-10 25 50.80TYC 5805-00518-1 12.1 14.9 82 9.5 2.830 0.933 6.56 -64.6946 -10.433 36.19 22.23 9.5542 -0.02186 0.04894 4.43177 2.11346 -0.00514 -0.00192 2000 197.3747152009 529.00000245.096150229.026902 1.6181740.06044076 3.0494257 2.8651160 9.2 5.00.15 RATE 1.8508750 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.034 0.031 83 1.77 0.031 0 54545.5020090602_0518-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 08:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org