IOTA/IOTA-ES occultation update for (9219) 1995 WO8 / HIP 42353 event on 2008 Jan 03, 21:53 UT Visible from S Africa Summary ------- On 2008 Jan 03 UT, the 17 km diameter asteroid (9219) 1995 WO8 will occult a 6.5 mag star in the constellation Cancer for observers along a path across S Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 9.4 mag to 15.9 mag (the magnitude of the asteroid) for at most 1.7 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: . The event at a glimpse ---------------------- * Rank: 9 * date and approx. time of event: 2008 Jan 03, 21:46 - 2008 Jan 03, 22:00 UT * midpoint of event [JD]: 2454469.41199167 * magnitude of target star: 6.5 * magnitude drop [mag]: 9.4 * estimated maximum duration [s]: 1.7 * Moon: 19 % sunlit, 101° distance * Sun: 152° distance * rough path description: S Africa The occultation path -------------------- * approximate projected width [km]: 26 * 1 sigma uncertainty interval [path widths]: +/- 6.97 * 1 sigma uncertainty interval [seconds]: +/- 16.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .121 +/- .072) * 1 sigma uncertainty ellipse (major, minor, PA): ( .121", .072", 91° ) * approx speed of asteroid's shadow [km/s]: 9.8681 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 42353 by 9219 1995 WO8 on 2008 Jan 03 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 ... .. .. -74 0 0 .. .. .. .. .. .. ... .. .. ... .. .. ... .. .. 111 29 13 ... .. .. -73 0 0 .. .. .. .. .. .. ... .. .. 116 26 55 ... .. .. 107 17 26 112 30 11 -72 0 0 21 46 10 2 309 18 113 7 51 111 52 47 ... .. .. 103 35 8 108 26 36 -71 0 0 21 46 11 3 312 16 109 0 47 107 52 35 ... .. .. 100 15 30 Latitude Latitude Latitude Latitude 107 0 0 -70 36 51 21 46 11 4 314 16 -70 27 51 -70 45 52 .. .. .. -72 55 32 106 0 0 -70 20 12 21 46 12 4 315 15 -70 11 9 -70 29 18 .. .. .. -72 39 53 105 0 0 -70 3 5 21 46 12 5 316 15 -69 53 58 -70 12 14 .. .. .. -72 23 43 104 0 0 -69 45 27 21 46 13 5 317 14 -69 36 17 -69 54 39 .. .. .. -72 7 3 103 0 0 -69 27 19 21 46 14 6 318 14 -69 18 5 -69 36 34 .. .. .. -71 49 52 102 0 0 -69 8 39 21 46 15 6 319 14 -68 59 22 -69 17 58 .. .. .. -71 32 9 101 0 0 -68 49 27 21 46 16 7 319 13 -68 40 7 -68 58 50 .. .. .. -71 13 54 100 0 0 -68 29 44 21 46 17 7 320 13 -68 20 20 -68 39 10 -66 13 8 -70 55 5 99 0 0 -68 9 28 21 46 18 8 321 12 -68 0 1 -68 18 57 -65 52 8 -70 35 43 98 0 0 -67 48 38 21 46 19 8 322 12 -67 39 8 -67 58 11 -65 30 35 -70 15 46 97 0 0 -67 27 15 21 46 20 9 323 11 -67 17 42 -67 36 51 -65 8 30 -69 55 15 96 0 0 -67 5 18 21 46 22 9 324 11 -66 55 42 -67 14 57 -64 45 52 -69 34 8 95 0 0 -66 42 47 21 46 23 10 325 10 -66 33 8 -66 52 29 -64 22 42 -69 12 25 94 0 0 -66 19 42 21 46 25 10 326 10 -66 10 0 -66 29 26 -63 58 59 -68 50 6 93 0 0 -65 56 2 21 46 26 11 327 9 -65 46 17 -66 5 49 -63 34 43 -68 27 10 92 0 0 -65 31 46 21 46 28 11 328 8 -65 22 0 -65 41 36 -63 9 54 -68 3 37 91 0 0 -65 6 56 21 46 30 12 329 8 -64 57 7 -65 16 48 -62 44 32 -67 39 27 90 0 0 -64 41 31 21 46 32 13 330 7 -64 31 40 -64 51 26 -62 18 37 -67 14 39 89 0 0 -64 15 31 21 46 35 13 331 7 -64 5 38 -64 25 28 -61 52 10 -66 49 14 88 0 0 -63 48 57 21 46 37 14 332 6 -63 39 1 -63 58 55 -61 25 9 -66 23 11 87 0 0 -63 21 47 21 46 40 14 332 5 -63 11 50 -63 31 47 -60 57 37 -65 56 30 86 0 0 -62 54 3 21 46 43 15 333 5 -62 44 4 -63 4 4 -60 29 32 -65 29 12 85 0 0 -62 25 44 21 46 45 16 334 4 -62 15 44 -62 35 47 -60 0 56 -65 1 17 84 0 0 -61 56 52 21 46 49 16 335 3 -61 46 51 -62 6 56 -59 31 48 -64 32 44 83 0 0 -61 27 27 21 46 52 17 336 3 -61 17 25 -61 37 32 -59 2 10 -64 3 35 82 0 0 -60 57 29 21 46 55 17 337 2 -60 47 26 -61 7 35 -58 32 2 -63 33 50 81 0 0 -60 26 59 21 46 59 18 338 1 -60 16 55 -60 37 5 -58 1 25 -63 3 29 80 0 0 -59 55 57 21 47 3 19 339 1 -59 45 53 -60 6 4 -57 30 19 -62 32 34 79 0 0 -59 24 25 21 47 7 19 340 0 -59 14 21 -59 34 32 -56 58 45 -62 1 4 78 0 0 -58 52 23 21 47 11 20 341 -1 -58 42 19 -59 2 30 -56 26 44 -61 29 1 77 0 0 -58 19 52 21 47 15 21 342 -2 -58 9 49 -58 29 59 -55 54 18 -60 56 26 76 0 0 -57 46 54 21 47 20 22 343 -2 -57 36 51 -57 57 0 -55 21 26 -60 23 20 75 0 0 -57 13 29 21 47 25 22 344 -3 -57 3 27 -57 23 34 -54 48 11 -59 49 44 74 0 0 -56 39 39 21 47 30 23 345 -4 -56 29 38 -56 49 43 -54 14 33 -59 15 39 73 0 0 -56 5 25 21 47 35 24 346 -5 -55 55 24 -56 15 28 -53 40 33 -58 41 7 72 0 0 -55 30 47 21 47 41 24 347 -5 -55 20 48 -55 40 49 -53 6 13 -58 6 9 71 0 0 -54 55 49 21 47 46 25 348 -6 -54 45 51 -55 5 49 -52 31 34 -57 30 46 70 0 0 -54 20 30 21 47 52 26 349 -7 -54 10 34 -54 30 29 -51 56 38 -56 54 59 69 0 0 -53 44 52 21 47 59 26 350 -8 -53 34 58 -53 54 49 -51 21 25 -56 18 52 68 0 0 -53 8 58 21 48 5 27 351 -9 -52 59 6 -53 18 53 -50 45 57 -55 42 25 67 0 0 -52 32 48 21 48 11 28 352 -10 -52 22 58 -52 42 41 -50 10 16 -55 5 39 66 0 0 -51 56 24 21 48 18 28 353 -10 -51 46 36 -52 6 14 -49 34 23 -54 28 37 65 0 0 -51 19 47 21 48 25 29 354 -11 -51 10 2 -51 29 35 -48 58 19 -53 51 20 64 0 0 -50 43 0 21 48 32 30 355 -12 -50 33 17 -50 52 45 -48 22 7 -53 13 50 63 0 0 -50 6 3 21 48 40 30 356 -13 -49 56 23 -50 15 46 -47 45 47 -52 36 10 62 0 0 -49 28 59 21 48 48 31 357 -14 -49 19 22 -49 38 39 -47 9 20 -51 58 19 61 0 0 -48 51 49 21 48 55 32 358 -14 -48 42 15 -49 1 27 -46 32 50 -51 20 21 60 0 0 -48 14 35 21 49 3 32 359 -15 -48 5 3 -48 24 9 -45 56 16 -50 42 18 59 0 0 -47 37 18 21 49 12 33 1 -16 -47 27 49 -47 46 49 -45 19 41 -50 4 10 58 0 0 -47 0 0 21 49 20 34 2 -17 -46 50 35 -47 9 28 -44 43 6 -49 26 0 57 0 0 -46 22 43 21 49 29 34 3 -18 -46 13 20 -46 32 7 -44 6 32 -48 47 49 56 0 0 -45 45 27 21 49 37 35 4 -19 -45 36 8 -45 54 49 -43 30 1 -48 9 40 55 0 0 -45 8 16 21 49 46 35 5 -19 -44 59 0 -45 17 34 -42 53 35 -47 31 34 54 0 0 -44 31 9 21 49 55 36 6 -20 -44 21 57 -44 40 24 -42 17 14 -46 53 32 53 0 0 -43 54 9 21 50 5 36 8 -21 -43 45 0 -44 3 20 -41 41 1 -46 15 36 52 0 0 -43 17 17 21 50 14 37 9 -22 -43 8 12 -43 26 25 -41 4 56 -45 37 48 51 0 0 -42 40 35 21 50 24 37 10 -23 -42 31 33 -42 49 40 -40 29 1 -45 0 9 50 0 0 -42 4 4 21 50 33 38 11 -23 -41 55 5 -42 13 5 -39 53 17 -44 22 41 49 0 0 -41 27 45 21 50 43 38 13 -24 -41 18 50 -41 36 42 -39 17 46 -43 45 26 48 0 0 -40 51 40 21 50 53 39 14 -25 -40 42 48 -41 0 34 -38 42 28 -43 8 24 47 0 0 -40 15 49 21 51 3 39 15 -26 -40 7 1 -40 24 40 -38 7 25 -42 31 37 46 0 0 -39 40 15 21 51 13 39 17 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32 0 0 -32 0 23 21 53 41 42 36 -35 -31 52 22 -32 8 25 -30 3 7 -34 3 10 31 0 0 -31 30 51 21 53 52 41 37 -36 -31 22 54 -31 38 51 -29 34 15 -33 32 53 30 0 0 -31 1 50 21 54 3 41 38 -36 -30 53 55 -31 9 47 -29 5 52 -33 3 7 29 0 0 -30 33 20 21 54 13 41 40 -37 -30 25 28 -30 41 14 -28 38 0 -32 33 53 28 0 0 -30 5 22 21 54 24 41 41 -37 -29 57 32 -30 13 13 -28 10 39 -32 5 12 27 0 0 -29 37 55 21 54 34 41 42 -37 -29 30 8 -29 45 44 -27 43 49 -31 37 4 26 0 0 -29 11 2 21 54 45 41 44 -38 -29 3 17 -29 18 48 -27 17 31 -31 9 30 25 0 0 -28 44 41 21 54 55 40 45 -38 -28 36 59 -28 52 25 -26 51 45 -30 42 30 24 0 0 -28 18 54 21 55 6 40 46 -38 -28 11 15 -28 26 36 -26 26 32 -30 16 4 23 0 0 -27 53 42 21 55 16 40 47 -39 -27 46 4 -28 1 20 -26 1 52 -29 50 14 22 0 0 -27 29 3 21 55 26 39 48 -39 -27 21 28 -27 36 40 -25 37 46 -29 24 59 21 0 0 -27 5 0 21 55 36 39 49 -39 -26 57 27 -27 12 34 -25 14 14 -29 0 20 20 0 0 -26 41 31 21 55 46 39 51 -39 -26 34 1 -26 49 3 -24 51 16 -28 36 18 19 0 0 -26 18 39 21 55 56 38 52 -39 -26 11 10 -26 26 9 -24 28 52 -28 12 52 18 0 0 -25 56 22 21 56 6 38 53 -39 -25 48 55 -26 3 50 -24 7 4 -27 50 2 17 0 0 -25 34 41 21 56 15 37 54 -40 -25 27 16 -25 42 7 -23 45 51 -27 27 51 16 0 0 -25 13 37 21 56 25 37 55 -40 -25 6 14 -25 21 1 -23 25 14 -27 6 16 15 0 0 -24 53 10 21 56 34 36 56 -40 -24 45 49 -25 0 32 -23 5 12 -26 45 20 14 0 0 -24 33 19 21 56 44 36 57 -40 -24 26 0 -24 40 40 -22 45 47 -26 25 1 13 0 0 -24 14 6 21 56 53 35 58 -40 -24 6 49 -24 21 25 -22 26 58 -26 5 21 12 0 0 -23 55 31 21 57 2 34 59 -40 -23 48 15 -24 2 48 -22 8 45 -25 46 20 11 0 0 -23 37 33 21 57 11 34 59 -39 -23 30 19 -23 44 49 -21 51 10 -25 27 57 10 0 0 -23 20 13 21 57 19 33 60 -39 -23 13 0 -23 27 27 -21 34 12 -25 10 13 9 0 0 -23 3 32 21 57 28 33 61 -39 -22 56 20 -23 10 44 -21 17 50 -24 53 9 8 0 0 -22 47 29 21 57 36 32 62 -39 -22 40 18 -22 54 40 -21 2 7 -24 36 44 7 0 0 -22 32 4 21 57 45 31 63 -39 -22 24 55 -22 39 14 -20 47 1 -24 20 58 6 0 0 -22 17 18 21 57 53 31 63 -39 -22 10 11 -22 24 27 -20 32 33 -24 5 53 5 0 0 -22 3 11 21 58 1 30 64 -38 -21 56 5 -22 10 18 -20 18 43 -23 51 27 4 0 0 -21 49 43 21 58 8 29 65 -38 -21 42 38 -21 56 50 -20 5 31 -23 37 41 3 0 0 -21 36 55 21 58 16 28 65 -38 -21 29 51 -21 44 0 -19 52 57 -23 24 36 2 0 0 -21 24 46 21 58 23 28 66 -37 -21 17 42 -21 31 50 -19 41 2 -23 12 11 1 0 0 -21 13 16 21 58 31 27 67 -37 -21 6 14 -21 20 19 -19 29 46 -23 0 27 0 0 0 -21 2 26 21 58 38 26 67 -37 -20 55 25 -21 9 28 -19 19 8 -22 49 23 - 1 0 0 -20 52 16 21 58 44 25 68 -36 -20 45 16 -20 59 18 -19 9 10 -22 39 0 - 2 0 0 -20 42 46 21 58 51 25 68 -36 -20 35 46 -20 49 47 -18 59 50 -22 29 19 - 3 0 0 -20 33 56 21 58 57 24 69 -35 -20 26 57 -20 40 56 -18 51 10 -22 20 18 - 4 0 0 -20 25 47 21 59 4 23 70 -35 -20 18 48 -20 32 46 -18 43 9 -22 11 59 - 5 0 0 -20 18 17 21 59 10 22 70 -34 -20 11 19 -20 25 16 -18 35 48 -22 4 21 - 6 0 0 -20 11 29 21 59 16 21 71 -34 -20 4 31 -20 18 27 -18 29 6 -21 57 25 - 7 0 0 -20 5 21 21 59 21 21 71 -33 -19 58 23 -20 12 19 -18 23 4 -21 51 10 - 8 0 0 -19 59 53 21 59 27 20 72 -33 -19 52 57 -20 6 51 -18 17 42 -21 45 37 - 9 0 0 -19 55 7 21 59 32 19 72 -32 -19 48 11 -20 2 4 -18 12 59 -21 40 46 - 10 0 0 -19 51 2 21 59 37 18 72 -31 -19 44 5 -19 57 59 -18 8 57 -21 36 37 - 11 0 0 -19 47 38 21 59 41 17 73 -31 -19 40 42 -19 54 35 -18 5 36 -21 33 11 - 12 0 0 -19 44 55 21 59 46 16 73 -30 -19 37 59 -19 51 52 -18 2 54 -21 30 26 - 13 0 0 -19 42 53 21 59 50 15 74 -30 -19 35 57 -19 49 50 -18 0 53 -21 28 24 - 14 0 0 -19 41 33 21 59 54 15 74 -29 -19 34 38 -19 48 30 -17 59 33 -21 27 5 - 15 0 0 -19 40 55 21 59 58 14 75 -28 -19 33 59 -19 47 52 -17 58 53 -21 26 28 - 16 0 0 -19 40 59 22 0 2 13 75 -27 -19 34 3 -19 47 56 -17 58 55 -21 26 35 - 17 0 0 -19 41 44 22 0 5 12 75 -27 -19 34 48 -19 48 42 -17 59 37 -21 27 24 - 18 0 0 -19 43 12 22 0 8 11 76 -26 -19 36 15 -19 50 10 -18 1 0 -21 28 56 - 19 0 0 -19 45 22 22 0 11 10 76 -25 -19 38 25 -19 52 20 -18 3 5 -21 31 12 - 20 0 0 -19 48 14 22 0 14 9 76 -25 -19 41 16 -19 55 12 -18 5 51 -21 34 10 - 21 0 0 -19 51 48 22 0 16 8 77 -24 -19 44 50 -19 58 47 .. .. .. -21 37 53 - 22 0 0 -19 56 5 22 0 18 7 77 -23 -19 49 7 -20 3 5 .. .. .. -21 42 19 - 23 0 0 -20 1 5 22 0 20 6 77 -22 -19 54 6 -20 8 5 .. .. .. -21 47 28 - 24 0 0 -20 6 47 22 0 22 5 78 -21 -19 59 47 -20 13 48 .. .. .. -21 53 22 - 25 0 0 -20 13 13 22 0 23 4 78 -21 -20 6 12 -20 20 14 .. .. .. -22 0 0 - 26 0 0 -20 20 21 22 0 24 4 78 -20 -20 13 20 -20 27 24 .. .. .. -22 7 21 - 27 0 0 -20 28 13 22 0 25 3 79 -19 -20 21 10 -20 35 16 .. .. .. -22 15 27 - 28 0 0 -20 36 48 22 0 26 2 79 -18 -20 29 44 -20 43 52 .. .. .. -22 24 18 - 29 0 0 -20 46 6 22 0 26 1 80 -17 -20 39 1 -20 53 11 .. .. .. -22 33 53 Data for the target star ------------------------ * name: HIP 42353 * constellation : Cancer * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 08 38 05.1523 DE: +09 34 28.513 * position source: mpos:HIP pm:HIP plx:HIP * standard error: RA,DE ["]: ( .017, .012 ) * V mag [mag]: 6.5 * B mag [mag]: 6.5 * Apparent position with proper motion RA(deg): 129.6375876965 DE(deg): 9.5461995897 * Equation of equinoxes (radians) : 0.000038883811023 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (9219) 1995 WO8 approx. diameter [km]: 17 approx. diameter ["]: .012 distance from Earth [AU]: 2.03800 * orbital information: orbit source: Preston date of fit: 2007 Nov 21 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 518 number of rejected observations: 5 time covered by the observations: 1952 Feb 17 - 2007 Oct 20 1 sigma uncertainty ellipse (major, minor, PA): 0.120, 0.071, 91° remarks: * orbital elements for (9219) 1995 WO8 : Mean anomaly = 301.39510052 deg Arg. of pericenter = 59.13163206 deg Long. of node = 144.96841061 deg Inclination = 14.27668901 deg Eccentricity = 0.22909490 Semimajor axis = 3.18020208 AU Perihelion dist = 2.45163401 AU Mag: H = 11.84, G = 0.15 Epoch of elements : MJD 54468.91200000 TDT (2008 Jan 03.912) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jan 03 9219 1995 WO8 21h 53.3m UT 6.5 8 38 5.152 9 34 28.51HIP 42353 6.5 15.9 17 1.7 2.038 -1.446 11.01 58.304 9.571 212.80 -22.81 21.8878 -.34149 -.66375 -4.95189 2.54988 -0.00242 0.00148 2000 299.84629420071226.00000 59.131632144.968411 14.2766890.229094903.180202082.4516340111.45 0.15 RATE 1.7378890 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.121 0.072 91.0 7.970 0.084 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Nov 24, 17:25 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org