IOTA/IOTA-ES occultation update for (1030) Vitja / TYC 0054-00236-1 event on 2009 Oct 07, 03:37 UT Visible from Summary ------- On 2009 Oct 07 UT, the 64 km diameter asteroid (1030) Vitja will occult a 10.5 mag star in the constellation Cetus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.2 mag to 15.6 mag (the magnitude of the asteroid) for at most 5.0 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: 58 * date and approx. time of event: 2009 Oct 07, 03:35 - 2009 Oct 07, 03:42 UT * magnitude of target star: 10.5 * magnitude drop [mag]: 5.2 * estimated maximum duration [s]: 5.0 * Moon: 90 % sunlit, 16° distance * Sun: 150° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 114 * 1 sigma uncertainty interval [path widths]: +/- 1.08 * 1 sigma uncertainty interval [seconds]: +/- 5.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .046 +/- .029) * 1 sigma uncertainty ellipse (major, minor, PA): ( .046", .029", 87° ) * approx speed of asteroid's shadow [km/s]: 12.8085 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0054-00236-1 by 1030 Vitja on 2009 Oct 7 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 6 55 16 -76 0 0 3 42 25 5 325 0 4 32 57 9 23 13 ... .. .. 15 7 26 4 56 13 -75 0 0 3 42 23 6 327 -1 2 46 51 7 9 55 - 1 40 22 12 16 55 3 20 47 -74 0 0 3 42 21 7 328 -2 1 21 49 5 23 11 - 2 45 15 10 1 43 2 3 49 -73 0 0 3 42 19 8 330 -3 0 13 26 3 57 0 - 3 36 47 8 12 52 1 1 37 -72 0 0 3 42 17 9 331 -4 - 0 41 32 2 47 8 - 4 17 24 6 44 27 0 11 32 -71 0 0 3 42 14 10 331 -4 - 1 25 28 1 50 32 - 4 48 58 5 32 20 - 0 28 31 -70 0 0 3 42 11 11 332 -5 - 2 0 11 1 4 53 - 5 12 54 4 33 29 - 1 0 6 -69 0 0 3 42 8 12 332 -6 - 2 27 6 0 28 26 - 5 30 21 3 45 39 - 1 24 27 -68 0 0 3 42 5 13 333 -7 - 2 47 20 - 0 0 11 - 5 42 11 3 7 7 - 1 42 34 -67 0 0 3 42 1 14 333 -7 - 3 1 48 - 0 22 5 - 5 49 10 2 36 30 - 1 55 14 -66 0 0 3 41 57 15 333 -8 - 3 11 13 - 0 38 7 - 5 51 52 2 12 44 - 2 3 7 -65 0 0 3 41 53 16 333 -8 - 3 16 10 - 0 49 1 - 5 50 46 1 54 57 - 2 6 45 -64 0 0 3 41 49 16 333 -9 - 3 17 10 - 0 55 23 - 5 46 18 1 42 25 - 2 6 36 -63 0 0 3 41 45 17 333 -10 - 3 14 38 - 0 57 41 - 5 38 47 1 34 33 - 2 3 2 -62 0 0 3 41 40 18 333 -10 - 3 8 53 - 0 56 20 - 5 28 31 1 30 52 - 1 56 21 -61 0 0 3 41 35 19 332 -11 - 3 0 14 - 0 51 41 - 5 15 44 1 30 57 - 1 46 51 -60 0 0 3 41 30 20 332 -11 - 2 48 55 - 0 44 1 - 5 0 39 1 34 28 - 1 34 44 -59 0 0 3 41 24 21 332 -11 - 2 35 9 - 0 33 36 - 4 43 25 1 41 7 - 1 20 12 -58 0 0 3 41 19 22 331 -12 - 2 19 7 - 0 20 37 - 4 24 12 1 50 38 - 1 3 26 -57 0 0 3 41 13 22 331 -12 - 2 0 57 - 0 5 16 - 4 3 7 2 2 50 - 0 44 34 -56 0 0 3 41 7 23 330 -13 - 1 40 49 0 12 19 - 3 40 18 2 17 31 - 0 23 43 -55 0 0 3 41 0 24 330 -13 - 1 18 48 0 31 58 - 3 15 48 2 34 32 - 0 0 59 -54 0 0 3 40 54 25 329 -13 - 0 54 59 0 53 36 - 2 49 44 2 53 45 0 23 32 -53 0 0 3 40 47 26 329 -14 - 0 29 29 1 17 7 - 2 22 8 3 15 3 0 49 46 -52 0 0 3 40 40 26 328 -14 - 0 2 21 1 42 27 - 1 53 5 3 38 21 1 17 39 -51 0 0 3 40 33 27 327 -14 0 26 22 2 9 30 - 1 22 37 4 3 34 1 47 8 -50 0 0 3 40 26 28 326 -14 0 56 36 2 38 14 - 0 50 47 4 30 38 2 18 11 -49 0 0 3 40 18 28 326 -15 1 28 20 3 8 35 - 0 17 35 4 59 29 2 50 46 -48 0 0 3 40 10 29 325 -15 2 1 32 3 40 33 0 16 57 5 30 5 3 24 52 -47 0 0 3 40 2 30 324 -15 2 36 11 4 14 5 0 52 47 6 2 24 4 0 27 -46 0 0 3 39 54 30 323 -15 3 12 16 4 49 10 1 29 56 6 36 24 4 37 31 -45 0 0 3 39 46 31 322 -15 3 49 46 5 25 48 2 8 23 7 12 6 5 16 4 -44 0 0 3 39 37 31 321 -15 4 28 42 6 3 58 2 48 9 7 49 28 5 56 6 -43 0 0 3 39 28 32 320 -15 5 9 4 6 43 42 3 29 14 8 28 31 6 37 39 -42 0 0 3 39 19 32 319 -15 5 50 53 7 24 59 4 11 40 9 9 15 7 20 44 -41 0 0 3 39 10 32 318 -15 6 34 11 8 7 51 4 55 26 9 51 42 8 5 22 -40 0 0 3 39 0 33 317 -15 7 18 58 8 52 20 5 40 36 10 35 54 8 51 35 -39 0 0 3 38 51 33 315 -14 8 5 18 9 38 28 6 27 12 11 21 53 9 39 27 -38 0 0 3 38 41 33 314 -14 8 53 12 10 26 18 7 15 15 12 9 42 10 29 0 -37 0 0 3 38 31 34 313 -14 9 42 45 11 15 53 8 4 49 12 59 26 11 20 19 -36 0 0 3 38 20 34 312 -13 10 33 59 12 7 18 8 55 57 13 51 7 12 13 28 -35 0 0 3 38 10 34 310 -13 11 27 0 13 0 36 9 48 44 14 44 53 13 8 32 -34 0 0 3 37 59 34 309 -13 12 21 52 13 55 55 10 43 13 15 40 49 14 5 38 -33 0 0 3 37 48 34 308 -12 13 18 40 14 53 20 11 39 31 16 39 2 15 4 53 -32 0 0 3 37 37 34 306 -12 14 17 33 15 52 58 12 37 43 17 39 41 16 6 24 -31 0 0 3 37 26 34 305 -11 15 18 37 16 54 59 13 37 55 18 42 57 17 10 22 -30 0 0 3 37 15 34 304 -11 16 22 1 17 59 33 14 40 17 19 49 1 18 16 57 -29 0 0 3 37 3 34 302 -10 17 27 57 19 6 52 15 44 57 20 58 7 19 26 24 -28 0 0 3 36 51 33 301 -9 18 36 36 20 17 11 16 52 7 22 10 34 20 38 57 -27 0 0 3 36 39 33 299 -8 19 48 13 21 30 45 18 1 57 23 26 41 21 54 56 -26 0 0 3 36 27 32 298 -7 21 3 6 22 47 57 19 14 43 24 46 54 23 14 44 -25 0 0 3 36 14 32 296 -6 22 21 34 24 9 10 20 30 43 26 11 45 24 38 47 -24 0 0 3 36 1 31 295 -5 23 44 4 25 34 57 21 50 17 27 41 53 26 7 41 -23 0 0 3 35 48 30 294 -4 25 11 6 27 5 55 23 13 50 29 18 10 27 42 11 -22 0 0 3 35 35 30 292 -3 26 43 20 28 42 56 24 41 53 31 1 44 29 23 14 -21 0 0 3 35 21 28 291 -2 28 21 37 30 27 6 26 15 6 32 54 12 Uncertainty in time = +/- 7 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 0054-00236-1 * constellation : Cetus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 02 52 28.9382 DE: +06 54 05.882 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .026, .021 ) * V mag [mag]: 10.5 * B mag [mag]: 11.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1030) Vitja approx. diameter [km]: 64 approx. diameter ["]: .034 distance from Earth [AU]: 2.56600 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 714 number of rejected observations: 65 time covered by the observations: 1924 Jun 06 - 2007 Oct 12 1 sigma uncertainty ellipse (major, minor, PA): 0.038, 0.020, 85° remarks: * orbital elements for (1030) Vitja : Mean anomaly = 205.66970866 deg Arg. of pericenter = 7.20530025 deg Long. of node = 187.89377468 deg Inclination = 14.78325387 deg Eccentricity = 0.12099110 Semimajor axis = 3.11870144 AU Perihelion dist = 2.74136633 AU Mag: H = 10.17, G = 0.15 Epoch of elements : MJD 55111.15100000 TDT (2009 Oct 07.151) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Oct 7 1030 Vitja 3h 37.8m UT 10.5 2 52 28.938 6 54 5.88TYC 0054-00236-1 11.5 15.6 64 5.0 2.566 -1.241 -16.53 -27.2594 6.906 122.52 -5.53 3.6304 0.55150 -0.61535 -5.38705 -4.82129 -0.00296 -0.00006 2000 205.463732200910 6.00000 7.205300187.893775 14.7832540.12099110 3.1187014 2.741366310.3 5.00.15 RATE 1.7895480 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.046 0.029 87 2.08 0.037 0 54545.5020091007_0236-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 14:30 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org