IOTA/IOTA-ES occultation update for (585) Bilkis / TYC 0769-01093-1 event on 2007 Nov 11, 08:12 UT Visible from USA, SW Canada Summary ------- On 2007 Nov 11 UT, the 58 km diameter asteroid (585) Bilkis will occult a 11.5 mag star in the constellation Canis Minor for observers along a path across USA, SW Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.9 mag to 14.3 mag (the magnitude of the asteroid) for at most 7.7 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: 89 * date and approx. time of event: 2007 Nov 11, 07:58 - 2007 Nov 11, 08:26 UT * magnitude of target star: 11.5 * magnitude drop [mag]: 2.9 * estimated maximum duration [s]: 7.7 * Moon: 2 % sunlit, 128° distance * Sun: 114° distance * rough path description: USA, SW Canada The occultation path -------------------- * approximate projected width [km]: 59 * 1 sigma uncertainty interval [path widths]: +/- 0.55 * 1 sigma uncertainty interval [seconds]: +/- 4.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .033 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .033", .024", 93° ) * approx speed of asteroid's shadow [km/s]: 7.5476 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0769-01093-1 by 585 Bilkis on 2007 Nov 11 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 20 35 49 -25 0 0 8 26 20 1 283 62 19 20 30 21 55 44 18 2 8 ... .. .. 16 21 13 -24 0 0 8 26 17 5 285 58 15 18 4 17 26 59 14 11 16 18 42 47 Latitude Latitude Latitude Latitude 15 0 0 -23 38 21 8 26 15 7 285 57 -23 55 6 -23 21 35 -24 13 29 -23 3 8 14 0 0 -23 21 34 8 26 13 7 286 56 -23 38 22 -23 4 44 -23 56 49 -22 46 13 13 0 0 -23 4 5 8 26 11 8 286 55 -23 20 57 -22 47 13 -23 39 28 -22 28 37 12 0 0 -22 45 56 8 26 9 9 286 54 -23 2 51 -22 28 59 -23 21 26 -22 10 20 11 0 0 -22 27 4 8 26 6 10 287 54 -22 44 3 -22 10 4 -23 2 43 -21 51 21 10 0 0 -22 7 31 8 26 3 11 287 53 -22 24 34 -21 50 27 -22 43 18 -21 31 39 9 0 0 -21 47 15 8 26 0 12 287 52 -22 4 22 -21 30 7 -22 23 10 -21 11 14 8 0 0 -21 26 16 8 25 57 13 288 51 -21 43 27 -21 9 4 -22 2 20 -20 50 7 7 0 0 -21 4 34 8 25 53 14 288 50 -21 21 49 -20 47 17 -21 40 47 -20 28 16 6 0 0 -20 42 8 8 25 49 15 289 49 -20 59 28 -20 24 47 -21 18 30 -20 5 40 5 0 0 -20 18 58 8 25 45 16 289 48 -20 36 23 -20 1 33 -20 55 30 -19 42 21 4 0 0 -19 55 4 8 25 40 17 289 47 -20 12 33 -19 37 34 -20 31 46 -19 18 17 3 0 0 -19 30 25 8 25 36 19 290 46 -19 47 59 -19 12 50 -20 7 16 -18 53 28 2 0 0 -19 5 1 8 25 30 20 290 45 -19 22 39 -18 47 21 -19 42 2 -18 27 53 1 0 0 -18 38 51 8 25 25 21 290 44 -18 56 35 -18 21 6 -19 16 3 -18 1 33 0 0 0 -18 11 55 8 25 19 22 290 43 -18 29 44 -17 54 5 -18 49 18 -17 34 26 - 1 0 0 -17 44 13 8 25 13 23 291 42 -18 2 7 -17 26 18 -18 21 47 -17 6 33 - 2 0 0 -17 15 45 8 25 7 24 291 41 -17 33 44 -16 57 44 -17 53 30 -16 37 53 - 3 0 0 -16 46 30 8 25 0 25 291 40 -17 4 35 -16 28 24 -17 24 26 -16 8 27 - 4 0 0 -16 16 28 8 24 53 26 291 39 -16 34 38 -15 58 16 -16 54 36 -15 38 13 - 5 0 0 -15 45 38 8 24 45 27 292 38 -16 3 54 -15 27 21 -16 23 58 -15 7 12 - 6 0 0 -15 14 1 8 24 37 28 292 37 -15 32 23 -14 55 38 -15 52 33 -14 35 23 - 7 0 0 -14 41 37 8 24 29 29 292 35 -15 0 5 -14 23 8 -15 20 21 -14 2 46 - 8 0 0 -14 8 25 8 24 20 31 292 34 -14 26 58 -13 49 50 -14 47 22 -13 29 21 - 9 0 0 -13 34 25 8 24 11 32 292 33 -13 53 5 -13 15 44 -14 13 34 -12 55 9 - 10 0 0 -12 59 37 8 24 2 33 293 32 -13 18 23 -12 40 50 -13 38 59 -12 20 8 - 11 0 0 -12 24 2 8 23 52 34 293 31 -12 42 54 -12 5 9 -13 3 37 -11 44 20 - 12 0 0 -11 47 39 8 23 42 35 293 30 -12 6 37 -11 28 39 -12 27 26 -11 7 44 - 13 0 0 -11 10 28 8 23 32 36 293 29 -11 29 32 -10 51 23 -11 50 29 -10 30 20 - 14 0 0 -10 32 31 8 23 21 38 293 28 -10 51 41 -10 13 19 -11 12 44 - 9 52 9 - 15 0 0 - 9 53 46 8 23 10 39 293 26 -10 13 2 - 9 34 28 -10 34 13 - 9 13 11 - 16 0 0 - 9 14 15 8 22 58 40 293 25 - 9 33 37 - 8 54 50 - 9 54 54 - 8 33 27 - 17 0 0 - 8 33 57 8 22 46 41 293 24 - 8 53 26 - 8 14 26 - 9 14 50 - 7 52 56 - 18 0 0 - 7 52 54 8 22 33 42 293 23 - 8 12 29 - 7 33 17 - 8 34 0 - 7 11 40 - 19 0 0 - 7 11 6 8 22 21 44 293 22 - 7 30 48 - 6 51 23 - 7 52 25 - 6 29 39 - 20 0 0 - 6 28 34 8 22 7 45 293 21 - 6 48 22 - 6 8 45 - 7 10 6 - 5 46 54 - 21 0 0 - 5 45 19 8 21 54 46 293 19 - 6 5 13 - 5 25 23 - 6 27 4 - 5 3 26 - 22 0 0 - 5 1 21 8 21 40 47 292 18 - 5 21 21 - 4 41 19 - 5 43 19 - 4 19 15 - 23 0 0 - 4 16 42 8 21 25 49 292 17 - 4 36 48 - 3 56 34 - 4 58 52 - 3 34 24 - 24 0 0 - 3 31 23 8 21 11 50 292 16 - 3 51 35 - 3 11 9 - 4 13 45 - 2 48 52 - 25 0 0 - 2 45 25 8 20 55 51 292 14 - 3 5 42 - 2 25 6 - 3 27 59 - 2 2 42 - 26 0 0 - 1 58 50 8 20 40 52 291 13 - 2 19 13 - 1 38 25 - 2 41 36 - 1 15 55 - 27 0 0 - 1 11 38 8 20 24 54 291 12 - 1 32 7 - 0 51 8 - 1 54 36 - 0 28 32 - 28 0 0 - 0 23 53 8 20 8 55 290 11 - 0 44 27 - 0 3 17 - 1 7 1 0 19 25 - 29 0 0 0 24 25 8 19 51 56 290 9 0 3 46 0 45 6 - 0 18 54 1 7 53 - 30 0 0 1 13 13 8 19 34 58 289 8 0 52 30 1 33 59 0 29 44 1 56 52 - 31 0 0 2 2 30 8 19 17 59 288 7 1 41 42 2 23 21 1 18 51 2 46 19 - 32 0 0 2 52 14 8 18 59 60 288 6 2 31 21 3 13 9 2 8 25 3 36 12 - 33 0 0 3 42 22 8 18 42 61 287 4 3 21 25 4 3 21 2 58 24 4 26 28 - 34 0 0 4 32 51 8 18 24 63 286 3 4 11 50 4 53 54 3 48 46 5 17 6 - 35 0 0 5 23 40 8 18 5 64 284 2 5 2 36 5 44 46 4 39 27 6 8 2 - 36 0 0 6 14 46 8 17 47 65 283 0 5 53 38 6 35 56 5 30 26 6 59 15 - 37 0 0 7 6 6 8 17 28 66 282 -1 6 44 55 7 27 19 6 21 40 7 50 41 - 38 0 0 7 57 38 8 17 9 68 280 -2 7 36 24 8 18 53 7 13 6 8 42 19 - 39 0 0 8 49 18 8 16 50 69 278 -3 8 28 3 9 10 36 8 4 42 9 34 4 - 40 0 0 9 41 5 8 16 31 70 276 -5 9 19 48 10 2 25 8 56 25 10 25 55 - 41 0 0 10 32 55 8 16 11 71 274 -6 10 11 36 10 54 17 9 48 12 11 17 48 - 42 0 0 11 24 46 8 15 52 72 271 -7 11 3 26 11 46 8 10 40 0 12 9 41 - 43 0 0 12 16 34 8 15 32 73 268 -8 11 55 13 12 37 57 11 31 46 13 1 31 - 44 0 0 13 8 17 8 15 13 74 265 -10 12 46 56 13 29 41 12 23 29 13 53 15 - 45 0 0 13 59 53 8 14 53 75 261 -11 13 38 31 14 21 16 13 15 4 14 44 50 - 46 0 0 14 51 17 8 14 33 76 257 -12 14 29 56 15 12 40 14 6 29 15 36 14 - 47 0 0 15 42 28 8 14 14 77 252 -13 15 21 7 16 3 50 14 57 41 16 27 23 - 48 0 0 16 33 22 8 13 54 77 246 -15 16 12 3 16 54 43 15 48 38 17 18 15 - 49 0 0 17 23 58 8 13 34 78 241 -16 17 2 40 17 45 18 16 39 16 18 8 48 - 50 0 0 18 14 12 8 13 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163 -32 28 40 22 29 21 1 28 18 2 29 43 25 - 65 0 0 29 41 45 8 8 44 70 160 -33 29 21 32 30 2 0 28 59 19 30 24 18 - 66 0 0 30 22 4 8 8 27 70 158 -34 30 1 56 30 42 13 29 39 50 31 4 24 - 67 0 0 31 1 35 8 8 12 69 156 -35 30 41 34 31 21 38 30 19 34 31 43 43 - 68 0 0 31 40 20 8 7 56 68 154 -36 31 20 24 32 0 17 30 58 31 32 22 15 - 69 0 0 32 18 17 8 7 41 67 152 -37 31 58 27 32 38 8 31 36 40 32 59 59 - 70 0 0 32 55 26 8 7 26 66 150 -38 32 35 43 33 15 11 32 14 3 33 36 55 - 71 0 0 33 31 48 8 7 11 65 149 -39 33 12 10 33 51 26 32 50 37 34 13 4 - 72 0 0 34 7 21 8 6 57 64 147 -39 33 47 50 34 26 53 33 26 24 34 48 24 - 73 0 0 34 42 7 8 6 43 63 146 -40 34 22 42 35 1 33 34 1 23 35 22 57 - 74 0 0 35 16 5 8 6 29 62 144 -41 34 56 47 35 35 24 34 35 34 35 56 41 - 75 0 0 35 49 15 8 6 16 61 143 -42 35 30 3 36 8 28 35 8 57 36 29 39 - 76 0 0 36 21 38 8 6 2 60 142 -43 36 2 32 36 40 45 35 41 33 37 1 48 - 77 0 0 36 53 14 8 5 49 59 141 -43 36 34 15 37 12 15 36 13 22 37 33 11 - 78 0 0 37 24 3 8 5 37 58 140 -44 37 5 10 37 42 58 36 44 25 38 3 47 - 79 0 0 37 54 6 8 5 25 57 138 -45 37 35 19 38 12 54 37 14 40 38 33 37 - 80 0 0 38 23 22 8 5 12 56 137 -45 38 4 41 38 42 5 37 44 10 39 2 40 - 81 0 0 38 51 53 8 5 1 55 136 -46 38 33 18 39 10 30 38 12 53 39 30 59 - 82 0 0 39 19 39 8 4 49 54 135 -47 39 1 10 39 38 9 38 40 52 39 58 32 - 83 0 0 39 46 40 8 4 38 53 134 -47 39 28 17 40 5 5 39 8 5 40 25 21 - 84 0 0 40 12 57 8 4 27 53 133 -48 39 54 40 40 31 16 39 34 34 40 51 25 - 85 0 0 40 38 31 8 4 16 52 132 -48 40 20 19 40 56 43 40 0 20 41 16 47 - 86 0 0 41 3 21 8 4 6 51 131 -49 40 45 15 41 21 28 40 25 22 41 41 25 - 87 0 0 41 27 29 8 3 56 50 130 -50 41 9 28 41 45 30 40 49 41 42 5 21 - 88 0 0 41 50 54 8 3 46 49 129 -50 41 33 0 42 8 50 41 13 19 42 28 35 - 89 0 0 42 13 39 8 3 36 48 129 -51 41 55 49 42 31 29 41 36 14 42 51 8 - 90 0 0 42 35 42 8 3 26 48 128 -51 42 17 58 42 53 27 41 58 28 43 13 0 - 91 0 0 42 57 5 8 3 17 47 127 -52 42 39 26 43 14 45 42 20 2 43 34 13 - 92 0 0 43 17 49 8 3 8 46 126 -52 43 0 15 43 35 24 42 40 56 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47 15 20 8 1 16 34 113 -57 46 58 47 47 31 54 46 40 35 47 50 9 -108 0 0 47 26 40 8 1 10 34 112 -57 47 10 9 47 43 11 46 52 1 48 1 22 -109 0 0 47 37 28 8 1 4 33 112 -57 47 21 0 47 53 56 47 2 55 48 12 4 -110 0 0 47 47 45 8 0 58 32 111 -57 47 31 20 48 4 10 47 13 18 48 22 16 -111 0 0 47 57 31 8 0 53 32 110 -58 47 41 9 48 13 54 47 23 10 48 31 57 -112 0 0 48 6 48 8 0 47 31 109 -58 47 50 28 48 23 8 47 32 31 48 41 8 -113 0 0 48 15 34 8 0 42 30 108 -58 47 59 17 48 31 52 47 41 23 48 49 49 -114 0 0 48 23 51 8 0 37 30 108 -58 48 7 36 48 40 7 47 49 44 48 58 1 -115 0 0 48 31 38 8 0 31 29 107 -58 48 15 25 48 47 52 47 57 36 49 5 44 -116 0 0 48 38 57 8 0 27 28 106 -58 48 22 46 48 55 8 48 4 58 49 12 58 -117 0 0 48 45 46 8 0 22 28 105 -58 48 29 37 49 1 56 48 11 52 49 19 44 -118 0 0 48 52 8 8 0 17 27 104 -58 48 36 0 49 8 16 48 18 17 49 26 2 -119 0 0 48 58 1 8 0 13 26 104 -58 48 41 55 49 14 7 48 24 13 49 31 52 -120 0 0 49 3 25 8 0 8 25 103 -58 48 47 21 49 19 31 48 29 41 49 37 14 -121 0 0 49 8 23 8 0 4 25 102 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46 25 48 56 55 50 4 1 -136 0 0 49 28 42 7 59 13 15 90 -56 49 12 43 49 44 41 48 55 10 50 2 18 -137 0 0 49 26 31 7 59 11 14 89 -56 49 10 31 49 42 31 48 52 57 50 0 8 -138 0 0 49 23 53 7 59 8 14 89 -56 49 7 53 49 39 54 48 50 18 49 57 32 -139 0 0 49 20 49 7 59 6 13 88 -56 49 4 48 49 36 51 48 47 12 49 54 30 -140 0 0 49 17 19 7 59 4 12 87 -55 49 1 17 49 33 22 48 43 39 49 51 2 -141 0 0 49 13 21 7 59 2 12 86 -55 48 57 18 49 29 26 48 39 40 49 47 7 -142 0 0 49 8 58 7 59 0 11 86 -55 48 52 53 49 25 3 48 35 13 49 42 46 -143 0 0 49 4 7 7 58 58 10 85 -55 48 48 1 49 20 14 48 30 19 49 37 58 -144 0 0 48 58 49 7 58 56 10 84 -54 48 42 42 49 14 58 48 24 59 49 32 44 -145 0 0 48 53 5 7 58 54 9 83 -54 48 36 56 49 9 15 48 19 11 49 27 3 -146 0 0 48 46 53 7 58 53 8 83 -54 48 30 42 49 3 5 48 12 55 49 20 55 -147 0 0 48 40 14 7 58 52 8 82 -53 48 24 1 48 56 28 48 6 12 49 14 20 -148 0 0 48 33 7 7 58 50 7 81 -53 48 16 53 48 49 23 47 59 2 49 7 17 -149 0 0 48 25 33 7 58 49 6 80 -53 48 9 16 48 41 51 47 51 23 48 59 47 -150 0 0 48 17 31 7 58 48 6 80 -52 48 1 12 48 33 51 47 43 16 48 51 50 -151 0 0 48 9 1 7 58 47 5 79 -52 47 52 40 48 25 24 47 34 42 48 43 25 -152 0 0 48 0 3 7 58 46 4 78 -52 47 43 39 48 16 28 47 25 38 48 34 32 -153 0 0 47 50 37 7 58 46 3 77 -51 47 34 10 48 7 4 47 16 6 48 25 11 -154 0 0 47 40 41 7 58 45 3 77 -51 47 24 13 47 57 11 47 6 6 48 15 21 -155 0 0 47 30 17 7 58 45 2 76 -50 47 13 46 47 46 50 46 55 36 48 5 3 -156 0 0 47 19 24 7 58 44 1 75 -50 47 2 50 47 36 0 46 44 37 47 54 16 -157 0 0 47 8 2 7 58 44 1 74 -50 46 51 24 47 24 40 46 33 8 47 43 0 -158 0 0 .. .. .. .. .. .. .. .. .. .. .. .. 47 12 52 .. .. .. 47 31 14 Data for the target star ------------------------ * name: TYC 0769-01093-1 * constellation : Canis Minor * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 35 07.3249 DE: +11 10 13.448 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .019 ) * V mag [mag]: 11.5 * B mag [mag]: 11.7 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (585) Bilkis approx. diameter [km]: 58 approx. diameter ["]: .049 distance from Earth [AU]: 1.64100 * orbital information: orbit source: Preston date of fit: 2007 Nov 06 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 910 number of rejected observations: 80 time covered by the observations: 1906 Feb 16 - 2007 Oct 26 1 sigma uncertainty ellipse (major, minor, PA): 0.027, 0.014, 95° remarks: * orbital elements for (585) Bilkis : Mean anomaly = 313.54826057 deg Arg. of pericenter = 327.89980359 deg Long. of node = 180.37105002 deg Inclination = 7.55618287 deg Eccentricity = 0.12950188 Semimajor axis = 2.43086564 AU Perihelion dist = 2.11606396 AU Mag: H = 10.29, G = 0.15 Epoch of elements : MJD 54415.34200000 TDT (2007 Nov 11.342) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Nov 11 585 Bilkis 8h 12.5m UT 11.5 7 35 7.325 11 10 13.45TYC 0769-01093-1 11.7 14.3 58 7.7 1.641 1.241 -13.67 -59.452 11.174 52.87 -17.35 8.2089 .11639 .15424 3.41211 -2.55066 -0.00498 0.00126 2000 312.159055200711 6.00000327.899804180.371050 7.5561830.129501882.430865642.1160639610.45 0.15 RATE 2.6005350 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.033 0.024 93.3 1.550 0.027 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Nov 07, 04:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org