IOTA/IOTA-ES occultation update for (2638) Gadolin / TYC 0745-00078-1 event on 2009 Dec 02, 17:33 UT Visible from Summary ------- On 2009 Dec 02 UT, the 13 km diameter asteroid (2638) Gadolin will occult a 10.4 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.1 mag to 15.5 mag (the magnitude of the asteroid) for at most 1.3 seconds. This update is based on historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 7 * date and approx. time of event: 2009 Dec 02, 17:26 - 2009 Dec 02, 17:42 UT * magnitude of target star: 10.4 * magnitude drop [mag]: 5.1 * estimated maximum duration [s]: 1.3 * Moon: 100 % sunlit, 24° distance * Sun: 152° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 16 * 1 sigma uncertainty interval [path widths]: +/- 9.20 * 1 sigma uncertainty interval [seconds]: +/- 11.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .130 +/- .082) * 1 sigma uncertainty ellipse (major, minor, PA): ( .133", .078", 104° ) * approx speed of asteroid's shadow [km/s]: 9.9803 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0745-00078-1 by 2638 Gadolin on 2009 Dec 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 ' " Longitude Longitude Longitude Longitude 69 22 40 -65 0 0 17 42 5 1 49 -1 69 6 29 69 38 48 ... .. .. 74 28 46 72 4 59 -64 0 0 17 42 4 3 47 -3 71 49 47 72 20 10 ... .. .. 76 53 47 Latitude Latitude Latitude Latitude 73 0 0 -63 38 32 17 42 3 4 46 -3 -63 32 40 -63 44 26 .. .. .. -65 34 37 74 0 0 -63 14 28 17 42 3 4 45 -4 -63 8 32 -63 20 23 .. .. .. -65 11 23 75 0 0 -62 49 40 17 42 2 5 44 -4 -62 43 43 -62 55 38 .. .. .. -64 47 26 76 0 0 -62 24 9 17 42 1 5 43 -5 -62 18 9 -62 30 10 .. .. .. -64 22 46 77 0 0 -61 57 54 17 42 1 6 42 -5 -61 51 52 -62 3 57 -60 2 32 -63 57 20 78 0 0 -61 30 54 17 42 0 7 41 -6 -61 24 50 -61 37 0 -59 34 49 -63 31 9 79 0 0 -61 3 9 17 41 58 7 40 -6 -60 57 2 -61 9 17 -59 6 21 -63 4 11 80 0 0 -60 34 38 17 41 57 8 40 -7 -60 28 29 -60 40 48 -58 37 8 -62 36 26 81 0 0 -60 5 20 17 41 56 9 39 -8 -59 59 9 -60 11 33 -58 7 10 -62 7 54 82 0 0 -59 35 16 17 41 54 9 38 -8 -59 29 2 -59 41 30 -57 36 27 -61 38 33 83 0 0 -59 4 24 17 41 53 10 37 -9 -58 58 8 -59 10 40 -57 4 57 -61 8 24 84 0 0 -58 32 44 17 41 51 11 36 -9 -58 26 26 -58 39 3 -56 32 41 -60 37 25 85 0 0 -58 0 17 17 41 49 12 35 -10 -57 53 57 -58 6 37 -55 59 40 -60 5 37 86 0 0 -57 27 2 17 41 47 12 34 -10 -57 20 41 -57 33 24 -55 25 52 -59 32 59 87 0 0 -56 52 59 17 41 44 13 34 -11 -56 46 36 -56 59 23 -54 51 19 -58 59 31 88 0 0 -56 18 8 17 41 42 14 33 -12 -56 11 44 -56 24 34 -54 15 59 -58 25 13 89 0 0 -55 42 30 17 41 39 15 32 -12 -55 36 4 -55 48 57 -53 39 55 -57 50 5 90 0 0 -55 6 5 17 41 36 16 31 -13 -54 59 38 -55 12 33 -53 3 5 -57 14 8 91 0 0 -54 28 53 17 41 33 16 30 -14 -54 22 24 -54 35 22 -52 25 31 -56 37 21 92 0 0 -53 50 55 17 41 29 17 29 -14 -53 44 25 -53 57 25 -51 47 13 -55 59 45 93 0 0 -53 12 11 17 41 26 18 28 -15 -53 5 41 -53 18 43 -51 8 13 -55 21 21 94 0 0 -52 32 43 17 41 22 19 28 -16 -52 26 12 -52 39 15 -50 28 30 -54 42 10 95 0 0 -51 52 31 17 41 18 20 27 -16 -51 45 59 -51 59 4 -49 48 7 -54 2 12 96 0 0 -51 11 37 17 41 13 21 26 -17 -51 5 4 -51 18 10 -49 7 3 -53 21 28 97 0 0 -50 30 1 17 41 9 22 25 -17 -50 23 28 -50 36 35 -48 25 21 -52 40 0 98 0 0 -49 47 46 17 41 4 22 24 -18 -49 41 12 -49 54 20 -47 43 2 -51 57 49 99 0 0 -49 4 51 17 40 59 23 23 -19 -48 58 18 -49 11 25 -47 0 7 -51 14 56 100 0 0 -48 21 20 17 40 53 24 22 -19 -48 14 47 -48 27 54 -46 16 38 -50 31 23 101 0 0 -47 37 14 17 40 47 25 21 -20 -47 30 41 -47 43 48 -45 32 36 -49 47 12 102 0 0 -46 52 34 17 40 42 26 21 -21 -46 46 2 -46 59 8 -44 48 4 -49 2 24 103 0 0 -46 7 23 17 40 35 27 20 -21 -46 0 51 -46 13 56 -44 3 3 -48 17 2 104 0 0 -45 21 42 17 40 29 28 19 -22 -45 15 11 -45 28 15 -43 17 35 -47 31 7 105 0 0 -44 35 34 17 40 22 29 18 -23 -44 29 4 -44 42 6 -42 31 42 -46 44 42 106 0 0 -43 49 1 17 40 15 30 17 -23 -43 42 32 -43 55 31 -41 45 26 -45 57 49 107 0 0 -43 2 5 17 40 8 31 16 -24 -42 55 36 -43 8 34 -40 58 50 -45 10 31 108 0 0 -42 14 48 17 40 0 32 15 -24 -42 8 21 -42 21 16 -40 11 55 -44 22 48 109 0 0 -41 27 12 17 39 52 33 14 -25 -41 20 46 -41 33 39 -39 24 44 -43 34 45 110 0 0 -40 39 21 17 39 44 34 13 -25 -40 32 56 -40 45 46 -38 37 19 -42 46 24 111 0 0 -39 51 15 17 39 35 35 12 -26 -39 44 53 -39 57 39 -37 49 42 -41 57 47 112 0 0 -39 2 59 17 39 27 36 11 -26 -38 56 38 -39 9 21 -37 1 56 -41 8 56 113 0 0 -38 14 34 17 39 18 37 10 -27 -38 8 14 -38 20 54 -36 14 2 -40 19 55 114 0 0 -37 26 2 17 39 8 37 9 -27 -37 19 44 -37 32 20 -35 26 4 -39 30 45 115 0 0 -36 37 26 17 38 59 38 8 -28 -36 31 10 -36 43 42 -34 38 3 -38 41 30 116 0 0 -35 48 48 17 38 49 39 7 -28 -35 42 35 -35 55 3 -33 50 2 -37 52 12 117 0 0 -35 0 11 17 38 39 40 6 -29 -34 54 0 -35 6 24 -33 2 3 -37 2 53 118 0 0 -34 11 37 17 38 29 41 5 -29 -34 5 28 -34 17 48 -32 14 7 -36 13 35 119 0 0 -33 23 8 17 38 19 42 3 -29 -33 17 1 -33 29 17 -31 26 18 -35 24 22 120 0 0 -32 34 47 17 38 8 43 2 -30 -32 28 42 -32 40 53 -30 38 37 -34 35 15 121 0 0 -31 46 35 17 37 57 44 1 -30 -31 40 32 -31 52 39 -29 51 7 -33 46 17 122 0 0 -30 58 35 17 37 46 44 360 -30 -30 52 34 -31 4 36 -29 3 48 -32 57 30 123 0 0 -30 10 48 17 37 35 45 358 -30 -30 4 50 -30 16 47 -28 16 44 -32 8 56 124 0 0 -29 23 17 17 37 24 46 357 -31 -29 17 21 -29 29 14 -27 29 56 -31 20 37 125 0 0 -28 36 4 17 37 12 47 356 -31 -28 30 10 -28 41 58 -26 43 26 -30 32 35 126 0 0 -27 49 10 17 37 1 47 354 -31 -27 43 19 -27 55 2 -25 57 16 -29 44 53 127 0 0 -27 2 37 17 36 49 48 353 -31 -26 56 48 -27 8 27 -25 11 27 -28 57 31 128 0 0 -26 16 27 17 36 37 49 351 -31 -26 10 40 -26 22 14 -24 26 0 -28 10 33 129 0 0 -25 30 41 17 36 25 49 350 -31 -25 24 57 -25 36 26 -23 40 58 -27 23 59 130 0 0 -24 45 22 17 36 13 50 348 -31 -24 39 40 -24 51 4 -22 56 22 -26 37 51 131 0 0 -24 0 29 17 36 1 50 347 -31 -23 54 50 -24 6 9 -22 12 14 -25 52 10 132 0 0 -23 16 6 17 35 49 51 345 -31 -23 10 28 -23 21 43 -21 28 33 -25 6 59 133 0 0 -22 32 12 17 35 37 51 343 -31 -22 26 37 -22 37 47 -20 45 23 -24 22 18 134 0 0 -21 48 50 17 35 24 52 342 -31 -21 43 17 -21 54 23 -20 2 44 -23 38 8 135 0 0 -21 6 0 17 35 12 52 340 -31 -21 0 30 -21 11 31 -19 20 36 -22 54 32 136 0 0 -20 23 44 17 35 0 52 338 -31 -20 18 16 -20 29 12 -18 39 2 -22 11 29 137 0 0 -19 42 2 17 34 47 53 336 -31 -19 36 36 -19 47 28 -17 58 2 -21 29 2 138 0 0 -19 0 56 17 34 35 53 335 -30 -18 55 32 -19 6 20 -17 17 37 -20 47 11 139 0 0 -18 20 26 17 34 22 53 333 -30 -18 15 5 -18 25 48 -16 37 48 -20 5 57 140 0 0 -17 40 34 17 34 10 53 331 -30 -17 35 15 -17 45 54 -15 58 36 -19 25 21 141 0 0 -17 1 20 17 33 58 53 329 -30 -16 56 2 -17 6 37 -15 20 1 -18 45 24 142 0 0 -16 22 44 17 33 45 54 328 -29 -16 17 29 -16 27 59 -14 42 4 -18 6 6 143 0 0 -15 44 48 17 33 33 54 326 -29 -15 39 35 -15 50 1 -14 4 46 -17 27 28 144 0 0 -15 7 32 17 33 21 54 324 -29 -15 2 21 -15 12 43 -13 28 8 -16 49 31 145 0 0 -14 30 56 17 33 8 53 322 -28 -14 25 47 -14 36 6 -12 52 9 -16 12 16 146 0 0 -13 55 2 17 32 56 53 321 -28 -13 49 55 -14 0 9 -12 16 51 -15 35 42 147 0 0 -13 19 49 17 32 44 53 319 -27 -13 14 44 -13 24 55 -11 42 13 -14 59 51 148 0 0 -12 45 18 17 32 32 53 317 -27 -12 40 15 -12 50 22 -11 8 17 -14 24 42 149 0 0 -12 11 30 17 32 20 53 316 -26 -12 6 28 -12 16 32 -10 35 3 -13 50 17 150 0 0 -11 38 24 17 32 8 53 314 -26 -11 33 24 -11 43 24 -10 2 31 -13 16 36 151 0 0 -11 6 1 17 31 56 52 313 -25 -11 1 3 -11 11 0 - 9 30 41 -12 43 38 152 0 0 -10 34 22 17 31 44 52 311 -25 -10 29 26 -10 39 19 - 8 59 33 -12 11 24 153 0 0 -10 3 26 17 31 33 51 310 -24 - 9 58 32 -10 8 21 - 8 29 9 -11 39 55 154 0 0 - 9 33 14 17 31 21 51 308 -24 - 9 28 21 - 9 38 8 - 7 59 27 -11 9 11 155 0 0 - 9 3 46 17 31 10 51 307 -23 - 8 58 55 - 9 8 38 - 7 30 29 -10 39 11 156 0 0 - 8 35 3 17 30 59 50 306 -23 - 8 30 13 - 8 39 53 - 7 2 14 -10 9 57 157 0 0 - 8 7 3 17 30 48 50 304 -22 - 8 2 15 - 8 11 52 - 6 34 42 - 9 41 27 158 0 0 - 7 39 48 17 30 37 49 303 -21 - 7 35 1 - 7 44 36 - 6 7 54 - 9 13 43 159 0 0 - 7 13 18 17 30 26 49 302 -21 - 7 8 32 - 7 18 4 - 5 41 50 - 8 46 44 160 0 0 - 6 47 32 17 30 15 48 301 -20 - 6 42 47 - 6 52 16 - 5 16 30 - 8 20 31 161 0 0 - 6 22 30 17 30 4 47 300 -19 - 6 17 47 - 6 27 14 - 4 51 53 - 7 55 3 162 0 0 - 5 58 14 17 29 54 47 299 -19 - 5 53 32 - 6 2 56 - 4 28 1 - 7 30 21 163 0 0 - 5 34 42 17 29 43 46 298 -18 - 5 30 2 - 5 39 23 - 4 4 53 - 7 6 24 164 0 0 - 5 11 55 17 29 33 45 297 -17 - 5 7 16 - 5 16 35 - 3 42 28 - 6 43 13 165 0 0 - 4 49 53 17 29 23 45 296 -17 - 4 45 15 - 4 54 31 - 3 20 47 - 6 20 48 166 0 0 - 4 28 35 17 29 13 44 296 -16 - 4 23 58 - 4 33 13 - 2 59 51 - 5 59 8 167 0 0 - 4 8 3 17 29 4 43 295 -15 - 4 3 27 - 4 12 39 - 2 39 39 - 5 38 14 168 0 0 - 3 48 15 17 28 54 43 294 -14 - 3 43 40 - 3 52 50 - 2 20 10 - 5 18 6 169 0 0 - 3 29 12 17 28 45 42 293 -14 - 3 24 38 - 3 33 46 - 2 1 26 - 4 58 43 170 0 0 - 3 10 54 17 28 35 41 293 -13 - 3 6 21 - 3 15 27 - 1 43 25 - 4 40 6 171 0 0 - 2 53 20 17 28 26 40 292 -12 - 2 48 48 - 2 57 52 - 1 26 9 - 4 22 14 172 0 0 - 2 36 31 17 28 17 39 292 -11 - 2 32 0 - 2 41 3 - 1 9 36 - 4 5 8 173 0 0 - 2 20 27 17 28 9 39 291 -11 - 2 15 57 - 2 24 58 - 0 53 47 - 3 48 47 174 0 0 - 2 5 7 17 28 0 38 291 -10 - 2 0 38 - 2 9 37 - 0 38 42 - 3 33 12 175 0 0 - 1 50 32 17 27 52 37 290 -9 - 1 46 4 - 1 55 2 - 0 24 21 - 3 18 23 176 0 0 - 1 36 42 17 27 44 36 290 -8 - 1 32 14 - 1 41 11 - 0 10 44 - 3 4 18 177 0 0 - 1 23 36 17 27 36 35 289 -7 - 1 19 9 - 1 28 4 0 2 9 - 2 51 0 178 0 0 - 1 11 15 17 27 28 35 289 -7 - 1 6 48 - 1 15 43 0 14 19 - 2 38 26 179 0 0 - 0 59 39 17 27 20 34 289 -6 - 0 55 12 - 1 4 5 0 25 44 - 2 26 38 180 0 0 - 0 48 47 17 27 13 33 288 -5 - 0 44 21 - 0 53 13 0 36 26 - 2 15 36 -179 0 0 - 0 38 39 17 27 5 32 288 -4 - 0 34 14 - 0 43 5 0 46 25 - 2 5 19 -178 0 0 - 0 29 16 17 26 58 31 288 -3 - 0 24 51 - 0 33 41 0 55 39 - 1 55 47 -177 0 0 - 0 20 38 17 26 51 30 287 -2 - 0 16 13 - 0 25 3 1 4 10 - 1 47 0 -176 0 0 - 0 12 44 17 26 44 29 287 -2 - 0 8 20 - 0 17 8 1 11 57 - 1 38 59 -175 0 0 - 0 5 35 17 26 38 28 287 -1 - 0 1 11 - 0 9 59 1 19 0 - 1 31 43 Uncertainty in time = +/- 14 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 0745-00078-1 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 30 53.0725 DE: +14 48 34.858 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .021 ) * V mag [mag]: 10.4 * B mag [mag]: 11.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2638) Gadolin approx. diameter [km]: 13 approx. diameter ["]: .012 distance from Earth [AU]: 1.45300 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: MPC (via Astdys) number of used observations: 513 number of rejected observations: 15 time covered by the observations: 1939 Sep 19 - 2007 Sep 21 1 sigma uncertainty ellipse (major, minor, PA): 0.131, 0.075, 104° remarks: * orbital elements for (2638) Gadolin : Mean anomaly = 24.64560791 deg Arg. of pericenter = 172.32733457 deg Long. of node = 245.94671468 deg Inclination = 14.35904125 deg Eccentricity = 0.08164752 Semimajor axis = 2.55445996 AU Perihelion dist = 2.34589464 AU Mag: H = 11.70, G = 0.15 Epoch of elements : MJD 55167.73100000 TDT (2009 Dec 02.731) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Dec 2 2638 Gadolin 17h 33.5m UT 10.4 6 30 53.073 14 48 34.86TYC 0745-00078-1 11.1 15.5 13 1.3 1.453 -1.948 -19.11 122.6428 14.814 -85.99 -22.05 17.5590 0.33308 -0.49115 -4.66445 -3.15835 -0.00255 0.00088 2000 22.77926720091125.00000172.327335245.946715 14.3590410.08164752 2.5544600 2.345894612.1 5.00.15 RATE 2.4141010 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.133 0.078 104 10.20 0.113 0 54581.5020091202_0078-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 09:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org