IOTA/IOTA-ES occultation update for (943) Begonia / TYC 1879-02357-1 event on 2010 Feb 05, 13:21 UT Visible from Australia, Indonesia, India Summary ------- On 2010 Feb 05 UT, the 69 km diameter asteroid (943) Begonia will occult a 11.2 mag star in the constellation Gemini for observers along a path across Australia, Indonesia, India. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.5 mag to 13.6 mag (the magnitude of the asteroid) for at most 11.7 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 83 * date and approx. time of event: 2010 Feb 05, 13:04 - 2010 Feb 05, 13:32 UT * magnitude of target star: 11.2 * magnitude drop [mag]: 2.5 * estimated maximum duration [s]: 11.7 * Moon: 55 % sunlit, 124° distance * Sun: 140° distance * rough path description: Australia, Indonesia, India The occultation path -------------------- * approximate projected width [km]: 77 * 1 sigma uncertainty interval [path widths]: +/- 0.62 * 1 sigma uncertainty interval [seconds]: +/- 5.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .040 +/- .026) * 1 sigma uncertainty ellipse (major, minor, PA): ( .040", .025", 82° ) * approx speed of asteroid's shadow [km/s]: 5.9222 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1879-02357-1 by 943 Begonia on 2010 Feb 5 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 152 47 11 -65 0 0 13 4 58 0 335 -9 153 41 44 151 52 47 ... .. .. 150 45 31 151 43 1 -64 0 0 13 4 59 1 336 -9 152 35 27 150 50 41 153 40 41 149 45 58 150 42 7 -63 0 0 13 4 59 2 337 -10 151 32 39 149 51 42 152 35 28 148 49 18 149 44 8 -62 0 0 13 5 0 3 338 -11 150 32 54 148 55 26 151 33 31 147 55 10 148 48 41 -61 0 0 13 5 2 5 339 -12 149 35 51 148 1 35 150 34 27 147 3 16 147 55 30 -60 0 0 13 5 4 6 339 -13 148 41 11 147 9 52 149 37 55 146 13 21 147 4 19 -59 0 0 13 5 6 7 340 -13 147 48 39 146 20 3 148 43 40 145 25 12 146 14 56 -58 0 0 13 5 9 8 341 -14 146 57 59 145 31 54 147 51 25 144 38 36 145 27 7 -57 0 0 13 5 12 9 341 -15 146 9 0 144 45 16 147 0 58 143 53 23 144 40 44 -56 0 0 13 5 16 10 342 -16 145 21 31 143 59 57 146 12 8 143 9 25 143 55 37 -55 0 0 13 5 20 11 343 -17 144 35 23 143 15 51 145 24 44 142 26 32 143 11 38 -54 0 0 13 5 25 12 343 -17 143 50 27 142 32 48 144 38 37 141 44 39 142 28 40 -53 0 0 13 5 29 13 344 -18 143 6 36 141 50 43 143 53 39 141 3 39 141 46 36 -52 0 0 13 5 35 14 344 -19 142 23 43 141 9 29 143 9 44 140 23 26 141 5 22 -51 0 0 13 5 41 15 345 -20 141 41 42 140 29 1 142 26 45 139 43 55 140 24 51 -50 0 0 13 5 47 16 346 -20 141 0 27 139 49 13 141 44 36 139 5 1 139 44 59 -49 0 0 13 5 53 18 346 -21 140 19 54 139 10 2 141 3 12 138 26 40 139 5 42 -48 0 0 13 6 0 19 347 -22 139 39 59 138 31 23 140 22 28 137 48 49 138 26 55 -47 0 0 13 6 7 20 347 -22 139 0 36 137 53 13 139 42 20 137 11 23 137 48 36 -46 0 0 13 6 15 21 348 -23 138 21 43 137 15 27 139 2 44 136 34 20 137 10 41 -45 0 0 13 6 23 22 348 -24 137 43 15 136 38 4 138 23 37 135 57 36 136 33 6 -44 0 0 13 6 32 23 349 -24 137 5 11 136 1 0 137 44 55 135 21 8 135 55 50 -43 0 0 13 6 41 24 349 -25 136 27 26 135 24 12 137 6 34 134 44 55 135 18 49 -42 0 0 13 6 50 25 350 -25 135 49 58 134 47 38 136 28 33 134 8 54 134 42 1 -41 0 0 13 7 0 26 350 -26 135 12 45 134 11 15 135 50 49 133 33 2 134 5 24 -40 0 0 13 7 10 27 351 -27 134 35 44 133 35 1 135 13 18 132 57 18 133 28 55 -39 0 0 13 7 20 28 351 -27 133 58 53 132 58 55 134 35 59 132 21 39 132 52 33 -38 0 0 13 7 31 29 352 -28 133 22 10 132 22 54 133 58 50 131 46 4 132 16 16 -37 0 0 13 7 42 30 352 -28 132 45 32 131 46 56 133 21 48 131 10 31 131 40 1 -36 0 0 13 7 54 31 353 -29 132 8 59 131 11 0 132 44 51 130 34 58 131 3 48 -35 0 0 13 8 6 32 353 -29 131 32 28 130 35 4 132 7 58 129 59 23 130 27 33 -34 0 0 13 8 18 33 354 -30 130 55 58 129 59 6 131 31 7 129 23 46 129 51 17 -33 0 0 13 8 31 34 354 -30 130 19 26 129 23 5 130 54 16 128 48 4 129 14 57 -32 0 0 13 8 44 35 355 -31 129 42 52 128 47 0 130 17 24 128 12 16 128 38 32 -31 0 0 13 8 58 36 355 -31 129 6 13 128 10 48 129 40 29 127 36 20 128 2 0 -30 0 0 13 9 11 38 356 -31 128 29 28 127 34 28 129 3 29 127 0 16 127 25 20 -29 0 0 13 9 26 39 357 -32 127 52 37 126 58 0 128 26 22 126 24 1 126 48 30 -28 0 0 13 9 40 40 357 -32 127 15 37 126 21 21 127 49 9 125 47 36 126 11 30 -27 0 0 13 9 55 41 358 -32 126 38 26 125 44 30 127 11 46 125 10 57 125 34 17 -26 0 0 13 10 10 42 358 -33 126 1 5 125 7 27 126 34 13 124 34 4 124 56 51 -25 0 0 13 10 26 43 359 -33 125 23 30 124 30 9 125 56 29 123 56 56 124 19 10 -24 0 0 13 10 42 44 360 -33 124 45 42 123 52 35 125 18 31 123 19 32 123 41 13 -23 0 0 13 10 58 45 1 -33 124 7 38 123 14 44 124 40 18 122 41 49 123 2 58 -22 0 0 13 11 15 46 1 -34 123 29 17 122 36 35 124 1 50 122 3 47 122 24 24 -21 0 0 13 11 31 47 2 -34 122 50 38 121 58 6 123 23 5 121 25 24 121 45 30 -20 0 0 13 11 49 48 3 -34 122 11 39 121 19 16 122 44 0 120 46 39 121 6 14 -19 0 0 13 12 6 49 4 -34 121 32 20 120 40 4 122 4 36 120 7 31 120 26 35 -18 0 0 13 12 24 49 5 -34 120 52 38 120 0 27 121 24 50 119 27 58 119 46 31 -17 0 0 13 12 42 50 6 -34 120 12 32 119 20 26 120 44 42 118 47 59 119 6 1 -16 0 0 13 13 1 51 7 -34 119 32 1 118 39 57 120 4 9 118 7 32 118 25 4 -15 0 0 13 13 20 52 8 -35 118 51 3 117 59 0 119 23 10 117 26 35 117 43 37 -14 0 0 13 13 39 53 9 -35 118 9 36 117 17 34 118 41 43 116 45 8 117 1 40 -13 0 0 13 13 58 54 10 -35 117 27 40 116 35 35 117 59 47 116 3 8 116 19 10 -12 0 0 13 14 18 55 11 -34 116 45 11 115 53 3 117 17 20 115 20 34 115 36 5 -11 0 0 13 14 38 56 13 -34 116 2 9 115 9 57 116 34 21 114 37 24 114 52 25 -10 0 0 13 14 59 57 14 -34 115 18 32 114 26 13 115 50 48 113 53 36 114 8 6 - 9 0 0 13 15 19 57 15 -34 114 34 17 113 41 50 115 6 38 113 9 7 113 23 7 - 8 0 0 13 15 40 58 17 -34 113 49 23 112 56 46 114 21 50 112 23 57 112 37 26 - 7 0 0 13 16 2 59 19 -34 113 3 48 112 10 59 113 36 21 111 38 2 111 51 1 - 6 0 0 13 16 23 60 20 -34 112 17 29 111 24 26 112 50 10 110 51 21 111 3 48 - 5 0 0 13 16 45 60 22 -33 111 30 24 110 37 6 112 3 14 110 3 50 110 15 46 - 4 0 0 13 17 7 61 24 -33 110 42 30 109 48 55 111 15 31 109 15 28 109 26 51 - 3 0 0 13 17 30 62 26 -33 109 53 45 108 59 51 110 26 57 108 26 11 108 37 2 - 2 0 0 13 17 52 62 28 -32 109 4 6 108 9 50 109 37 31 107 35 57 107 46 14 - 1 0 0 13 18 15 63 30 -32 108 13 30 107 18 50 108 47 9 106 44 42 106 54 25 0 0 0 13 18 39 63 32 -32 107 21 54 106 26 48 107 55 49 105 52 22 106 1 30 1 0 0 13 19 2 63 35 -31 106 29 14 105 33 39 107 3 26 104 58 54 Latitude Latitude Latitude Latitude 105 0 0 2 8 10 13 19 29 64 38 -31 2 38 49 1 37 19 3 16 33 0 58 47 104 0 0 3 13 2 13 19 55 64 40 -30 3 43 16 2 42 36 4 20 31 2 4 36 103 0 0 4 16 18 13 20 21 64 43 -30 4 46 9 3 46 16 5 22 55 3 8 47 102 0 0 5 17 59 13 20 47 64 46 -29 5 47 27 4 48 21 6 23 45 4 11 21 101 0 0 6 18 6 13 21 12 64 49 -28 6 47 12 5 48 51 7 23 3 5 12 20 100 0 0 7 16 41 13 21 36 64 51 -28 7 45 25 6 47 48 8 20 51 6 11 44 99 0 0 8 13 44 13 22 1 64 54 -27 8 42 8 7 45 12 9 17 8 7 9 35 98 0 0 9 9 17 13 22 25 64 56 -26 9 37 20 8 41 5 10 11 56 8 5 55 97 0 0 10 3 21 13 22 48 64 59 -26 10 31 5 9 35 29 11 5 16 9 0 43 96 0 0 10 55 57 13 23 12 63 61 -25 11 23 22 10 28 24 11 57 10 9 54 2 95 0 0 11 47 6 13 23 34 63 63 -24 12 14 13 11 19 51 12 47 39 10 45 53 94 0 0 12 36 50 13 23 57 63 65 -24 13 3 39 12 9 53 13 36 44 11 36 18 93 0 0 13 25 10 13 24 19 62 67 -23 13 51 42 12 58 31 14 24 26 12 25 17 92 0 0 14 12 7 13 24 40 62 69 -22 14 38 23 13 45 45 15 10 47 13 12 52 91 0 0 14 57 44 13 25 2 61 70 -22 15 23 43 14 31 37 15 55 48 13 59 5 90 0 0 15 42 0 13 25 23 60 72 -21 16 7 44 15 16 10 16 39 30 14 43 57 89 0 0 16 24 58 13 25 43 60 73 -20 16 50 27 15 59 23 17 21 55 15 27 30 88 0 0 17 6 39 13 26 3 59 74 -19 17 31 53 16 41 18 18 3 3 16 9 43 87 0 0 17 47 4 13 26 23 58 76 -19 18 12 4 17 21 57 18 42 57 16 50 40 86 0 0 18 26 14 13 26 42 58 77 -18 18 51 1 18 1 21 19 21 37 17 30 22 85 0 0 19 4 11 13 27 1 57 78 -17 19 28 45 18 39 31 19 59 5 18 8 48 84 0 0 19 40 56 13 27 19 56 79 -17 20 5 17 19 16 29 20 35 22 18 46 2 83 0 0 20 16 30 13 27 37 56 79 -16 20 40 40 19 52 16 21 10 29 19 22 5 82 0 0 20 50 55 13 27 55 55 80 -15 21 14 53 20 26 53 21 44 28 19 56 56 81 0 0 21 24 12 13 28 13 54 81 -14 21 47 58 21 0 21 22 17 19 20 30 39 80 0 0 21 56 21 13 28 30 53 81 -14 22 19 56 21 32 41 22 49 4 21 3 13 79 0 0 22 27 24 13 28 46 52 82 -13 22 50 49 22 3 55 23 19 44 21 34 41 78 0 0 22 57 23 13 29 3 52 82 -12 23 20 37 22 34 4 23 49 19 22 5 2 77 0 0 23 26 18 13 29 19 51 82 -11 23 49 22 23 3 9 24 17 52 22 34 20 76 0 0 23 54 10 13 29 34 50 83 -11 24 17 5 23 31 10 24 45 23 23 2 33 75 0 0 24 21 0 13 29 50 49 83 -10 24 43 46 23 58 10 25 11 53 23 29 45 74 0 0 24 46 50 13 30 5 49 83 -9 25 9 27 24 24 9 25 37 24 23 55 54 73 0 0 25 11 40 13 30 19 48 83 -8 25 34 9 24 49 7 26 1 55 24 21 3 72 0 0 25 35 32 13 30 34 47 84 -8 25 57 52 25 13 7 26 25 29 24 45 13 71 0 0 25 58 25 13 30 48 46 84 -7 26 20 38 25 36 8 26 48 5 25 8 24 70 0 0 26 20 22 13 31 2 45 84 -6 26 42 27 25 58 12 27 9 45 25 30 38 69 0 0 26 41 22 13 31 15 45 84 -6 27 3 20 26 19 20 27 30 29 25 51 54 68 0 0 27 1 27 13 31 28 44 84 -5 27 23 19 26 39 31 27 50 19 26 12 14 67 0 0 27 20 37 13 31 41 43 84 -4 27 42 23 26 58 48 28 9 15 26 31 39 66 0 0 27 38 54 13 31 54 42 84 -3 28 0 33 27 17 11 28 27 18 26 50 10 65 0 0 27 56 17 13 32 6 41 84 -3 28 17 51 27 34 40 28 44 29 27 7 46 64 0 0 28 12 48 13 32 18 41 83 -2 28 34 16 27 51 17 29 0 47 27 24 29 63 0 0 28 28 27 13 32 30 40 83 -1 28 49 50 28 7 1 29 16 15 27 40 20 62 0 0 28 43 15 13 32 41 39 83 0 29 4 32 28 21 53 29 30 51 27 55 19 Uncertainty in time = +/- 8 secs Prediction of 2009 Dec 27.0 Data for the target star ------------------------ * name: TYC 1879-02357-1 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 29 09.8907 DE: +22 30 39.972 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .018, .018 ) * V mag [mag]: 11.2 * B mag [mag]: 12.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (943) Begonia approx. diameter [km]: 69 approx. diameter ["]: .059 distance from Earth [AU]: 1.62500 * orbital information: orbit source: Preston date of fit: 2009 Dec 27 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 740 number of rejected observations: 37 time covered by the observations: 1920 Oct 21 - 2009 Dec 15 1 sigma uncertainty ellipse (major, minor, PA): 0.036, 0.018, 80° remarks: * orbital elements for (943) Begonia : Mean anomaly = 355.57618361 deg Arg. of pericenter = 4.55059492 deg Long. of node = 113.88313569 deg Inclination = 12.10534586 deg Eccentricity = 0.21062501 Semimajor axis = 3.11971910 AU Perihelion dist = 2.46262824 AU Mag: H = 9.63, G = 0.15 Epoch of elements : MJD 55232.55600000 TDT (2010 Feb 05.556) ------ occelmnt file for Occult BEGIN ----------------------------------- 2010 Feb 5 943 Begonia 13h 21.1m UT 11.2 6 29 9.891 22 30 39.97TYC 1879-02357-1 12.2 13.6 69 11.7 1.625 -0.781 14.46 121.4303 22.507 -16.77 -15.85 13.3515 -0.34572 -0.26010 -2.00609 2.67376 0.00368 -0.00012 2000 355.1189992010 2 3.00000 4.550595113.883136 12.1053460.21062501 3.1197191 2.4626282 9.8 5.00.15 RATE 1.7886730 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.040 0.025 82 1.62 0.036 0 055192.0020100205_2357-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2009 Dec 27, 14:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org