IOTA/IOTA-ES occultation update for (1294) Antwerpia / HIP 21873 event on 2008 Nov 04, 07:15 UT Visible from Argentina, Chile Summary ------- On 2008 Nov 04 UT, the 35 km diameter asteroid (1294) Antwerpia will occult a 8.1 mag star in the constellation Taurus for observers along a path across Argentina, Chile. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.8 mag to 12.9 mag (the magnitude of the asteroid) for at most 6.3 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: . The event at a glimpse ---------------------- * Rank: 62 * date and approx. time of event: 2008 Nov 04, 07:04 - 2008 Nov 04, 07:28 UT * magnitude of target star: 8.1 * magnitude drop [mag]: 4.8 * estimated maximum duration [s]: 6.3 * Moon: 32 % sunlit, 140° distance * Sun: 150° distance * rough path description: Argentina, Chile The occultation path -------------------- * approximate projected width [km]: 54 * 1 sigma uncertainty interval [path widths]: +/- 0.99 * 1 sigma uncertainty interval [seconds]: +/- 7.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .056 +/- .036) * 1 sigma uncertainty ellipse (major, minor, PA): ( .057", .034", 77° ) * approx speed of asteroid's shadow [km/s]: 5.5304 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 21873 by 1294 Antwerpia on 2008 Nov 4 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 -165 0 0 -32 8 7 7 28 22 0 71 -23 -31 52 18 .. .. .. .. .. .. .. .. .. -164 0 0 -31 50 48 7 28 22 1 71 -24 -31 35 2 -32 6 38 .. .. .. -32 38 18 -163 0 0 -31 33 59 7 28 21 2 70 -25 -31 18 17 -31 49 46 .. .. .. -32 21 18 -162 0 0 -31 17 42 7 28 20 3 69 -26 -31 2 3 -31 33 25 .. .. .. -32 4 50 -161 0 0 -31 1 55 7 28 19 4 69 -27 -30 46 20 -31 17 35 .. .. .. -31 48 54 -160 0 0 -30 46 40 7 28 17 4 68 -28 -30 31 8 -31 2 17 -30 0 38 -31 33 29 -159 0 0 -30 31 56 7 28 14 5 68 -28 -30 16 27 -30 47 30 -29 46 3 -31 18 35 -158 0 0 -30 17 44 7 28 12 6 67 -29 -30 2 18 -30 33 14 -29 32 0 -31 4 13 -157 0 0 -30 4 3 7 28 9 7 67 -30 -29 48 40 -30 19 31 -29 18 27 -30 50 24 -156 0 0 -29 50 53 7 28 5 8 66 -31 -29 35 33 -30 6 18 -29 5 26 -30 37 6 -155 0 0 -29 38 16 7 28 1 9 66 -31 -29 22 59 -29 53 38 -28 52 57 -30 24 20 -154 0 0 -29 26 10 7 27 56 10 65 -32 -29 10 55 -29 41 30 -28 40 59 -30 12 6 -153 0 0 -29 14 36 7 27 52 11 65 -33 -28 59 24 -29 29 53 -28 29 32 -30 0 24 -152 0 0 -29 3 34 7 27 46 11 64 -34 -28 48 24 -29 18 48 -28 18 37 -29 49 14 -151 0 0 -28 53 3 7 27 41 12 64 -34 -28 37 56 -29 8 15 -28 8 13 -29 38 36 -150 0 0 -28 43 4 7 27 35 13 63 -35 -28 27 59 -28 58 14 -27 58 21 -29 28 31 -149 0 0 -28 33 37 7 27 29 14 63 -36 -28 18 34 -28 48 45 -27 49 0 -29 18 57 -148 0 0 -28 24 42 7 27 22 15 62 -36 -28 9 41 -28 39 48 -27 40 11 -29 9 56 -147 0 0 -28 16 18 7 27 15 16 62 -37 -28 1 19 -28 31 22 -27 31 53 -29 1 26 -146 0 0 -28 8 27 7 27 7 16 61 -38 -27 53 29 -28 23 29 -27 24 6 -28 53 29 -145 0 0 -28 1 6 7 27 0 17 61 -38 -27 46 11 -28 16 7 -27 16 51 -28 46 3 -144 0 0 -27 54 18 7 26 52 18 60 -39 -27 39 24 -28 9 16 -27 10 7 -28 39 10 -143 0 0 -27 48 1 7 26 43 19 60 -39 -27 33 8 -28 2 58 -27 3 55 -28 32 48 -142 0 0 -27 42 15 7 26 34 20 59 -40 -27 27 24 -27 57 11 -26 58 13 -28 26 58 -141 0 0 -27 37 1 7 26 25 20 58 -40 -27 22 11 -27 51 55 -26 53 3 -28 21 40 -140 0 0 -27 32 18 7 26 16 21 58 -41 -27 17 30 -27 47 11 -26 48 24 -28 16 53 -139 0 0 -27 28 7 7 26 6 22 57 -42 -27 13 19 -27 42 58 -26 44 15 -28 12 38 -138 0 0 -27 24 26 7 25 56 23 57 -42 -27 9 40 -27 39 17 -26 40 38 -28 8 55 -137 0 0 -27 21 17 7 25 45 23 56 -42 -27 6 31 -27 36 7 -26 37 31 -28 5 43 -136 0 0 -27 18 39 7 25 35 24 55 -43 -27 3 54 -27 33 28 -26 34 56 -28 3 2 -135 0 0 -27 16 31 7 25 24 25 55 -43 -27 1 47 -27 31 20 -26 32 50 -28 0 52 -134 0 0 -27 14 55 7 25 13 26 54 -44 -27 0 12 -27 29 43 -26 31 16 -27 59 14 -133 0 0 -27 13 49 7 25 1 26 53 -44 -26 59 6 -27 28 36 -26 30 12 -27 58 7 -132 0 0 -27 13 14 7 24 49 27 53 -44 -26 58 32 -27 28 1 -26 29 38 -27 57 30 -131 0 0 -27 13 9 7 24 37 28 52 -45 -26 58 28 -27 27 56 -26 29 34 -27 57 24 -130 0 0 -27 13 35 7 24 25 28 51 -45 -26 58 54 -27 28 22 -26 30 1 -27 57 50 -129 0 0 -27 14 32 7 24 12 29 51 -45 -26 59 50 -27 29 18 -26 30 58 -27 58 45 -128 0 0 -27 15 58 7 23 59 29 50 -46 -27 1 17 -27 30 44 -26 32 24 -28 0 12 -127 0 0 -27 17 55 7 23 46 30 49 -46 -27 3 13 -27 32 41 -26 34 21 -28 2 8 -126 0 0 -27 20 21 7 23 33 31 48 -46 -27 5 40 -27 35 7 -26 36 47 -28 4 35 -125 0 0 -27 23 18 7 23 20 31 48 -46 -27 8 36 -27 38 4 -26 39 43 -28 7 32 -124 0 0 -27 26 44 7 23 6 32 47 -46 -27 12 2 -27 41 30 -26 43 8 -28 11 0 -123 0 0 -27 30 40 7 22 52 32 46 -46 -27 15 57 -27 45 27 -26 47 3 -28 14 57 -122 0 0 -27 35 5 7 22 38 33 45 -46 -27 20 22 -27 49 53 -26 51 27 -28 19 24 -121 0 0 -27 40 0 7 22 23 33 44 -47 -27 25 16 -27 54 48 -26 56 20 -28 24 20 -120 0 0 -27 45 24 7 22 9 34 43 -47 -27 30 40 -28 0 13 -27 1 42 -28 29 46 -119 0 0 -27 51 17 7 21 54 34 42 -47 -27 36 32 -28 6 7 -27 7 33 -28 35 42 -118 0 0 -27 57 39 7 21 39 35 41 -47 -27 42 54 -28 12 30 -27 13 53 -28 42 7 -117 0 0 -28 4 30 7 21 24 35 41 -46 -27 49 44 -28 19 22 -27 20 41 -28 49 1 -116 0 0 -28 11 50 7 21 9 36 40 -46 -27 57 2 -28 26 43 -27 27 58 -28 56 24 -115 0 0 -28 19 39 7 20 54 36 39 -46 -28 4 50 -28 34 32 -27 35 43 -29 4 16 -114 0 0 -28 27 55 7 20 38 37 38 -46 -28 13 5 -28 42 50 -27 43 56 -29 12 36 -113 0 0 -28 36 41 7 20 23 37 37 -46 -28 21 49 -28 51 37 -27 52 37 -29 21 25 -112 0 0 -28 45 54 7 20 7 37 36 -46 -28 31 1 -29 0 51 -28 1 46 -29 30 43 -111 0 0 -28 55 35 7 19 51 38 35 -46 -28 40 41 -29 10 34 -28 11 23 -29 40 29 -110 0 0 -29 5 44 7 19 35 38 34 -45 -28 50 48 -29 20 45 -28 21 28 -29 50 42 -109 0 0 -29 16 21 7 19 19 38 32 -45 -29 1 23 -29 31 23 -28 32 0 -30 1 24 -108 0 0 -29 27 25 7 19 3 39 31 -45 -29 12 26 -29 42 29 -28 42 59 -30 12 34 -107 0 0 -29 38 57 7 18 46 39 30 -44 -29 23 55 -29 54 3 -28 54 25 -30 24 11 -106 0 0 -29 50 55 7 18 30 39 29 -44 -29 35 52 -30 6 3 -29 6 18 -30 36 16 -105 0 0 -30 3 21 7 18 13 39 28 -44 -29 48 16 -30 18 31 -29 18 38 -30 48 47 -104 0 0 -30 16 13 7 17 57 40 27 -43 -30 1 6 -30 31 25 -29 31 24 -31 1 46 -103 0 0 -30 29 32 7 17 40 40 26 -43 -30 14 23 -30 44 46 -29 44 36 -31 15 12 -102 0 0 -30 43 17 7 17 24 40 25 -43 -30 28 6 -30 58 34 -29 58 15 -31 29 4 -101 0 0 -30 57 29 7 17 7 40 23 -42 -30 42 15 -31 12 47 -30 12 19 -31 43 22 -100 0 0 -31 12 6 7 16 50 40 22 -42 -30 56 49 -31 27 27 -30 26 50 -31 58 7 - 99 0 0 -31 27 9 7 16 33 40 21 -41 -31 11 50 -31 42 33 -30 41 45 -32 13 18 - 98 0 0 -31 42 37 7 16 17 40 20 -41 -31 27 16 -31 58 4 -30 57 6 -32 28 54 - 97 0 0 -31 58 31 7 16 0 40 19 -40 -31 43 7 -32 14 0 -31 12 52 -32 44 56 - 96 0 0 -32 14 49 7 15 43 40 18 -40 -31 59 22 -32 30 21 -31 29 2 -33 1 23 - 95 0 0 -32 31 33 7 15 26 40 16 -39 -32 16 3 -32 47 8 -31 45 37 -33 18 15 - 94 0 0 -32 48 40 7 15 10 40 15 -39 -32 33 8 -33 4 18 -32 2 36 -33 35 32 - 93 0 0 -33 6 12 7 14 53 40 14 -38 -32 50 37 -33 21 53 -32 20 0 -33 53 13 - 92 0 0 -33 24 8 7 14 36 40 13 -37 -33 8 29 -33 39 52 -32 37 46 -34 11 18 - 91 0 0 -33 42 27 7 14 20 40 12 -37 -33 26 45 -33 58 14 -32 55 56 -34 29 47 - 90 0 0 -34 1 10 7 14 3 40 10 -36 -33 45 25 -34 17 0 -33 14 30 -34 48 39 - 89 0 0 -34 20 15 7 13 46 39 9 -35 -34 4 27 -34 36 9 -33 33 25 -35 7 55 - 88 0 0 -34 39 43 7 13 30 39 8 -35 -34 23 51 -34 55 40 -33 52 44 -35 27 33 - 87 0 0 -34 59 33 7 13 14 39 7 -34 -34 43 38 -35 15 34 -34 12 24 -35 47 34 - 86 0 0 -35 19 45 7 12 57 39 6 -33 -35 3 47 -35 35 49 -34 32 26 -36 7 56 - 85 0 0 -35 40 19 7 12 41 38 4 -33 -35 24 17 -35 56 26 -34 52 49 -36 28 41 - 84 0 0 -36 1 13 7 12 25 38 3 -32 -35 45 8 -36 17 25 -35 13 33 -36 49 46 - 83 0 0 -36 22 28 7 12 9 38 2 -31 -36 6 19 -36 38 44 -35 34 37 -37 11 13 - 82 0 0 -36 44 4 7 11 53 37 1 -31 -36 27 51 -37 0 23 -35 56 2 -37 33 0 - 81 0 0 -37 5 59 7 11 37 37 360 -30 -36 49 43 -37 22 22 -36 17 46 -37 55 7 - 80 0 0 -37 28 14 7 11 22 37 359 -29 -37 11 53 -37 44 41 -36 39 50 -38 17 34 - 79 0 0 -37 50 48 7 11 6 36 358 -28 -37 34 23 -38 7 18 -37 2 12 -38 40 19 - 78 0 0 -38 13 40 7 10 51 36 357 -28 -37 57 11 -38 30 14 -37 24 53 -39 3 23 - 77 0 0 -38 36 49 7 10 36 35 355 -27 -38 20 17 -38 53 28 -37 47 51 -39 26 45 - 76 0 0 -39 0 17 7 10 21 35 354 -26 -38 43 40 -39 16 59 -38 11 7 -39 50 25 - 75 0 0 -39 24 1 7 10 6 34 353 -25 -39 7 21 -39 40 48 -38 34 39 -40 14 22 - 74 0 0 -39 48 1 7 9 52 34 352 -25 -39 31 17 -40 4 52 -38 58 28 -40 38 34 - 73 0 0 -40 12 17 7 9 38 33 351 -24 -39 55 29 -40 29 12 -39 22 32 -41 3 3 - 72 0 0 -40 36 48 7 9 23 33 350 -23 -40 19 56 -40 53 48 -39 46 51 -41 27 47 - 71 0 0 -41 1 34 7 9 9 32 349 -22 -40 44 37 -41 18 38 -40 11 25 -41 52 45 - 70 0 0 -41 26 34 7 8 56 32 348 -22 -41 9 33 -41 43 41 -40 36 12 -42 17 58 - 69 0 0 -41 51 46 7 8 42 31 347 -21 -41 34 41 -42 8 58 -41 1 13 -42 43 23 - 68 0 0 -42 17 12 7 8 29 31 346 -20 -42 0 3 -42 34 28 -41 26 26 -43 9 1 - 67 0 0 -42 42 49 7 8 16 30 345 -19 -42 25 36 -43 0 9 -41 51 51 -43 34 51 - 66 0 0 -43 8 37 7 8 3 30 344 -18 -42 51 20 -43 26 1 -42 17 27 -44 0 52 - 65 0 0 -43 34 36 7 7 51 29 343 -18 -43 17 14 -43 52 4 -42 43 14 -44 27 4 - 64 0 0 -44 0 44 7 7 39 28 342 -17 -43 43 19 -44 18 17 -43 9 11 -44 53 24 - 63 0 0 -44 27 1 7 7 27 28 341 -16 -44 9 32 -44 44 38 -43 35 16 -45 19 54 - 62 0 0 -44 53 26 7 7 15 27 340 -15 -44 35 53 -45 11 7 -44 1 30 -45 46 32 - 61 0 0 -45 19 59 7 7 4 26 340 -14 -45 2 22 -45 37 44 -44 27 51 -46 13 17 - 60 0 0 -45 46 38 7 6 53 26 339 -14 -45 28 57 -46 4 27 -44 54 19 -46 40 8 - 59 0 0 -46 13 23 7 6 42 25 338 -13 -45 55 39 -46 31 16 -45 20 53 -47 7 5 - 58 0 0 -46 40 13 7 6 32 24 337 -12 -46 22 25 -46 58 10 -45 47 32 -47 34 7 - 57 0 0 -47 7 7 7 6 22 24 336 -11 -46 49 15 -47 25 8 -46 14 15 -48 1 12 - 56 0 0 -47 34 4 7 6 12 23 335 -10 -47 16 8 -47 52 8 -46 41 2 -48 28 20 - 55 0 0 -48 1 4 7 6 2 22 334 -10 -47 43 4 -48 19 11 -47 7 51 -48 55 30 - 54 0 0 -48 28 4 7 5 53 22 333 -9 -48 10 2 -48 46 16 -47 34 42 -49 22 42 - 53 0 0 -48 55 6 7 5 44 21 332 -8 -48 37 0 -49 13 20 -48 1 33 -49 49 53 - 52 0 0 -49 22 7 7 5 36 20 332 -7 -49 3 58 -49 40 25 -48 28 25 -50 17 4 - 51 0 0 -49 49 7 7 5 28 20 331 -6 -49 30 54 -50 7 27 -48 55 16 -50 44 13 - 50 0 0 -50 16 4 7 5 20 19 330 -6 -49 57 49 -50 34 28 -49 22 5 -51 11 20 - 49 0 0 -50 42 59 7 5 12 18 329 -5 -50 24 41 -51 1 25 -49 48 52 -51 38 23 - 48 0 0 -51 9 49 7 5 5 18 328 -4 -50 51 29 -51 28 19 -50 15 35 -52 5 22 - 47 0 0 -51 36 35 7 4 58 17 327 -3 -51 18 12 -51 55 7 -50 42 13 -52 32 15 - 46 0 0 -52 3 15 7 4 51 16 326 -3 -51 44 50 -52 21 49 -51 8 47 -52 59 3 - 45 0 0 -52 29 49 7 4 45 15 326 -2 -52 11 21 -52 48 25 -51 35 14 -53 25 43 - 44 0 0 -52 56 15 7 4 39 15 325 -1 -52 37 45 -53 14 53 -52 1 34 -53 52 15 - 43 0 0 -53 22 32 7 4 33 14 324 -1 -53 4 1 -53 41 13 -52 27 47 -54 18 38 Uncertainty in time = +/- 9 secs [Prediction of 2008 Oct 30.0] Data for the target star ------------------------ * name: HIP 21873 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 42 09.7315 DE: +15 58 11.292 * position source: Pos: HIP2, pm: HIP2, pi:HIP2 * standard error: RA,DE ["]: ( .026, .022 ) * V mag [mag]: 8.1 * B mag [mag]: 8.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1294) Antwerpia approx. diameter [km]: 35 approx. diameter ["]: .041 distance from Earth [AU]: 1.17400 * orbital information: orbit source: Preston date of fit: 2008 Oct 30 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 633 number of rejected observations: 48 time covered by the observations: 1917 Mar 16 - 2008 Oct 19 1 sigma uncertainty ellipse (major, minor, PA): 0.051, 0.026, 73° remarks: * orbital elements for (1294) Antwerpia : Mean anomaly = 14.11091271 deg Arg. of pericenter = 313.37197804 deg Long. of node = 81.19179268 deg Inclination = 8.72773509 deg Eccentricity = 0.23259873 Semimajor axis = 2.68746938 AU Perihelion dist = 2.06236743 AU Mag: H = 10.58, G = 0.15 Epoch of elements : MJD 54774.30300000 TDT (2008 Nov 04.303) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Nov 4 1294 Antwerpia 7h 16.0m UT 8.1 4 42 9.731 15 58 11.29HIP 21873 8.5 12.9 35 6.3 1.174 -1.557 6.61 -82.3643 15.966 66.90 -15.51 7.2663 -0.21535 -0.73260 -2.99413 0.88269 -0.00269 0.00016 2000 13.14828120081031.00000313.371978 81.191793 8.7277350.23259873 2.6874694 2.062367410.2 5.00.15 RATE 2.2371180 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.057 0.034 77 1.99 0.041 0 54769.5020081104__21873 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 30, 13:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org