IOTA/IOTA-ES occultation update for (1459) Magnya / TYC 7466-00773-1 event on 2009 May 02, 19:10 UT Visible from Summary ------- On 2009 May 02 UT, the 30 km diameter asteroid (1459) Magnya will occult a 10.5 mag star in the constellation Microscopium for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.8 mag to 15.3 mag (the magnitude of the asteroid) for at most 1.6 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: 33 * date and approx. time of event: 2009 May 02, 19:04 - 2009 May 02, 19:10 UT * magnitude of target star: 10.5 * magnitude drop [mag]: 4.8 * estimated maximum duration [s]: 1.6 * Moon: 61 % sunlit, 154° distance * Sun: 95° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 31 * 1 sigma uncertainty interval [path widths]: +/- 2.01 * 1 sigma uncertainty interval [seconds]: +/- 4.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .050 +/- .029) * 1 sigma uncertainty ellipse (major, minor, PA): ( .050", .028", 77° ) * approx speed of asteroid's shadow [km/s]: 18.2338 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7466-00773-1 by 1459 Magnya on 2009 May 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 93 0 0 19 9 57 19 4 56 1 127 -50 18 59 33 19 20 22 18 17 47 20 2 18 94 0 0 18 26 19 19 4 56 2 128 -50 18 15 54 18 36 45 17 34 5 19 18 44 95 0 0 17 42 21 19 4 56 3 128 -50 17 31 55 17 52 48 16 50 4 18 34 50 96 0 0 16 58 5 19 4 57 4 128 -50 16 47 39 17 8 32 16 5 45 17 50 37 97 0 0 16 13 33 19 4 58 6 129 -50 16 3 6 16 24 0 15 21 10 17 6 7 98 0 0 15 28 46 19 4 58 7 129 -50 15 18 18 15 39 13 14 36 21 16 21 22 99 0 0 14 43 45 19 4 59 8 129 -50 14 33 17 14 54 13 13 51 19 15 36 23 100 0 0 13 58 33 19 5 0 9 129 -50 13 48 5 14 9 1 13 6 6 14 51 11 101 0 0 13 13 11 19 5 2 11 130 -50 13 2 43 13 23 39 12 20 44 14 5 49 102 0 0 12 27 41 19 5 3 12 130 -50 12 17 13 12 38 9 11 35 14 13 20 19 103 0 0 11 42 5 19 5 5 13 130 -50 11 31 37 11 52 33 10 49 39 12 34 42 104 0 0 10 56 24 19 5 7 14 130 -49 10 45 57 11 6 52 10 3 59 11 49 0 105 0 0 10 10 41 19 5 9 16 131 -49 10 0 14 10 21 8 9 18 18 11 3 14 106 0 0 9 24 57 19 5 11 17 131 -49 9 14 30 9 35 23 8 32 37 10 17 28 107 0 0 8 39 14 19 5 13 18 131 -48 8 28 48 8 49 40 7 46 58 9 31 42 108 0 0 7 53 34 19 5 16 19 131 -48 7 43 9 8 4 0 7 1 22 8 45 58 109 0 0 7 7 59 19 5 18 21 131 -48 6 57 35 7 18 24 6 15 51 8 0 19 110 0 0 6 22 31 19 5 21 22 131 -47 6 12 8 6 32 55 5 30 28 7 14 46 111 0 0 5 37 12 19 5 24 23 132 -47 5 26 50 5 47 34 4 45 14 6 29 21 112 0 0 4 52 3 19 5 27 24 132 -46 4 41 42 5 2 24 4 0 11 5 44 6 113 0 0 4 7 6 19 5 31 26 132 -46 3 56 46 4 17 26 3 15 20 4 59 3 114 0 0 3 22 23 19 5 34 27 132 -45 3 12 5 3 32 42 2 30 44 4 14 13 115 0 0 2 37 56 19 5 38 28 132 -45 2 27 39 2 48 13 1 46 24 3 29 38 116 0 0 1 53 46 19 5 41 29 132 -44 1 43 31 2 4 2 1 2 22 2 45 21 117 0 0 1 9 55 19 5 45 31 132 -43 0 59 42 1 20 9 0 18 40 2 1 22 118 0 0 0 26 25 19 5 49 32 132 -43 0 16 13 0 36 37 - 0 24 42 1 17 43 119 0 0 - 0 16 43 19 5 53 33 133 -42 - 0 26 53 - 0 6 33 - 1 7 41 0 34 25 120 0 0 - 0 59 27 19 5 58 34 133 -41 - 1 9 35 - 0 49 19 - 1 50 16 - 0 8 28 121 0 0 - 1 41 47 19 6 2 35 133 -40 - 1 51 53 - 1 31 40 - 2 32 25 - 0 50 58 122 0 0 - 2 23 40 19 6 7 37 133 -40 - 2 33 44 - 2 13 35 - 3 14 8 - 1 33 1 123 0 0 - 3 5 5 19 6 11 38 133 -39 - 3 15 7 - 2 55 2 - 3 55 23 - 2 14 36 124 0 0 - 3 46 1 19 6 16 39 133 -38 - 3 56 1 - 3 36 1 - 4 36 8 - 2 55 43 125 0 0 - 4 26 27 19 6 21 40 133 -37 - 4 36 25 - 4 16 29 - 5 16 23 - 3 36 20 126 0 0 - 5 6 21 19 6 26 41 133 -37 - 5 16 17 - 4 56 26 - 5 56 7 - 4 16 26 127 0 0 - 5 45 44 19 6 31 43 133 -36 - 5 55 37 - 5 35 50 - 6 35 18 - 4 56 0 128 0 0 - 6 24 33 19 6 36 44 133 -35 - 6 34 24 - 6 14 41 - 7 13 55 - 5 35 0 129 0 0 - 7 2 47 19 6 41 45 134 -34 - 7 12 36 - 6 52 58 - 7 51 58 - 6 13 27 130 0 0 - 7 40 27 19 6 47 46 134 -33 - 7 50 13 - 7 30 40 - 8 29 26 - 6 51 18 131 0 0 - 8 17 30 19 6 52 47 134 -32 - 8 27 14 - 8 7 46 - 9 6 17 - 7 28 34 132 0 0 - 8 53 57 19 6 57 48 134 -32 - 9 3 38 - 8 44 15 - 9 42 32 - 8 5 13 133 0 0 - 9 29 47 19 7 3 50 134 -31 - 9 39 25 - 9 20 7 -10 18 9 - 8 41 14 134 0 0 -10 4 58 19 7 8 51 134 -30 -10 14 35 - 9 55 21 -10 53 9 - 9 16 38 135 0 0 -10 39 31 19 7 14 52 135 -29 -10 49 5 -10 29 57 -11 27 29 - 9 51 23 136 0 0 -11 13 25 19 7 20 53 135 -28 -11 22 57 -11 3 53 -12 1 11 -10 25 30 137 0 0 -11 46 39 19 7 26 54 135 -27 -11 56 9 -11 37 10 -12 34 13 -10 58 56 138 0 0 -12 19 14 19 7 31 55 135 -26 -12 28 41 -12 9 47 -13 6 36 -11 31 43 139 0 0 -12 51 8 19 7 37 56 135 -26 -13 0 33 -12 41 44 -13 38 18 -12 3 50 140 0 0 -13 22 22 19 7 43 57 136 -25 -13 31 44 -13 13 0 -14 9 20 -12 35 16 141 0 0 -13 52 55 19 7 49 58 136 -24 -14 2 15 -13 43 35 -14 39 41 -13 6 1 142 0 0 -14 22 47 19 7 55 59 136 -23 -14 32 5 -14 13 30 -15 9 21 -13 36 5 143 0 0 -14 51 58 19 8 1 60 137 -22 -15 1 13 -14 42 43 -15 38 20 -14 5 28 144 0 0 -15 20 28 19 8 7 61 137 -21 -15 29 40 -15 11 15 -16 6 38 -14 34 10 145 0 0 -15 48 16 19 8 13 62 138 -20 -15 57 26 -15 39 6 -16 34 15 -15 2 10 146 0 0 -16 15 23 19 8 19 63 138 -19 -16 24 31 -16 6 15 -17 1 10 -15 29 28 147 0 0 -16 41 48 19 8 25 64 139 -19 -16 50 54 -16 32 43 -17 27 24 -15 56 5 148 0 0 -17 7 32 19 8 31 65 140 -18 -17 16 36 -16 58 29 -17 52 57 -16 22 0 149 0 0 -17 32 35 19 8 37 66 141 -17 -17 41 36 -17 23 33 -18 17 48 -16 47 13 150 0 0 -17 56 56 19 8 43 67 141 -16 -18 5 55 -17 47 56 -18 41 59 -17 11 45 151 0 0 -18 20 35 19 8 49 68 142 -15 -18 29 32 -18 11 38 -19 5 28 -17 35 35 152 0 0 -18 43 34 19 8 55 69 143 -14 -18 52 29 -18 34 38 -19 28 16 -17 58 44 153 0 0 -19 5 51 19 9 1 70 145 -13 -19 14 44 -18 56 58 -19 50 23 -18 21 11 154 0 0 -19 27 27 19 9 7 71 146 -12 -19 36 18 -19 18 36 -20 11 49 -18 42 57 155 0 0 -19 48 22 19 9 13 72 147 -12 -19 57 11 -19 39 33 -20 32 35 -19 4 2 156 0 0 -20 8 37 19 9 19 72 149 -11 -20 17 24 -19 59 49 -20 52 40 -19 24 26 157 0 0 -20 28 10 19 9 25 73 151 -10 -20 36 56 -20 19 25 -21 12 5 -19 44 9 158 0 0 -20 47 4 19 9 31 74 153 -9 -20 55 47 -20 38 20 -21 30 49 -20 3 11 159 0 0 -21 5 17 19 9 37 75 155 -8 -21 13 59 -20 56 35 -21 48 54 -20 21 33 160 0 0 -21 22 50 19 9 43 75 158 -7 -21 31 30 -21 14 10 -22 6 18 -20 39 14 161 0 0 -21 39 43 19 9 49 76 160 -6 -21 48 22 -21 31 4 -22 23 3 -20 56 16 162 0 0 -21 55 56 19 9 55 76 163 -6 -22 4 33 -21 47 19 -22 39 9 -21 12 37 163 0 0 -22 11 30 19 10 1 77 166 -5 -22 20 6 -22 2 55 -22 54 35 -21 28 18 164 0 0 -22 26 25 19 10 7 77 170 -4 -22 34 59 -22 17 50 -23 9 23 -21 43 20 165 0 0 -22 40 40 19 10 13 78 174 -3 -22 49 13 -22 32 7 -23 23 31 -21 57 42 166 0 0 -22 54 16 19 10 19 78 178 -2 -23 2 48 -22 45 45 -23 37 1 -22 11 25 167 0 0 -23 7 14 19 10 25 78 182 -1 -23 15 44 -22 58 44 -23 49 52 -22 24 29 168 0 0 -23 19 33 19 10 31 78 186 0 -23 28 2 -23 11 4 -24 2 5 -22 36 54 Uncertainty in time = +/- 5 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 7466-00773-1 * constellation : Microscopium * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 59 33.1076 DE: -34 47 20.040 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .022 ) * V mag [mag]: 10.5 * B mag [mag]: 11.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1459) Magnya approx. diameter [km]: 30 approx. diameter ["]: .016 distance from Earth [AU]: 2.62500 * orbital information: orbit source: Preston date of fit: 2008 Apr 24 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 676 number of rejected observations: 17 time covered by the observations: 1937 Nov 06 - 2008 Feb 12 1 sigma uncertainty ellipse (major, minor, PA): 0.045, 0.017, 74° remarks: * orbital elements for (1459) Magnya : Mean anomaly = 302.66205093 deg Arg. of pericenter = 328.93370573 deg Long. of node = 41.62866372 deg Inclination = 16.94003063 deg Eccentricity = 0.23582645 Semimajor axis = 3.14287359 AU Perihelion dist = 2.40170086 AU Mag: H = 10.24, G = 0.15 Epoch of elements : MJD 54953.79900000 TDT (2009 May 02.799) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 May 2 1459 Magnya 19h 10.6m UT 10.5 20 59 33.108-34 47 20.04TYC 7466-00773-1 11.5 15.3 30 1.6 2.625 2.732 -7.47 166.3956 -34.787 -108.42 15.59 19.1774 0.04419 0.19546 10.04751 -2.22842 -0.00544 -0.00151 2000 301.9900302009 429.00000328.933706 41.628664 16.9400310.23582645 3.1428736 2.4017009 9.9 5.00.15 RATE 1.7689420 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.050 0.028 77 3.01 0.032 0 54581.5020090502_0773-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 06:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org