IOTA/IOTA-ES occultation update for (1116) Catriona / TYC 2934-01549-1 event on 2008 Mar 02, 00:06 UT Visible from NE USA, SE Canada Summary ------- On 2008 Mar 02 UT, the 39 km diameter asteroid (1116) Catriona will occult a 11.5 mag star in the constellation Auriga for observers along a path across NE USA, SE Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.5 mag to 13.9 mag (the magnitude of the asteroid) for at most 3.0 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 65 * date and approx. time of event: 2008 Mar 03, 00:03 - 2008 Mar 03, 00:14 UT * magnitude of target star: 11.5 * magnitude drop [mag]: 2.5 * estimated maximum duration [s]: 3.0 * Moon: 32 % sunlit, 166° distance * Sun: 110° distance * rough path description: NE USA, SE Canada The occultation path -------------------- * approximate projected width [km]: 39 * 1 sigma uncertainty interval [path widths]: +/- 0.93 * 1 sigma uncertainty interval [seconds]: +/- 2.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .032 +/- .026) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .026", 91° ) * approx speed of asteroid's shadow [km/s]: 13.2226 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2934-01549-1 by 1116 Catriona on 2008 Mar 1 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 - 18 1 54 -33 0 0 24 14 30 1 324 -47 - 18 17 22 - 17 46 24 - 18 46 4 - 17 17 31 - 18 52 57 -32 0 0 24 14 30 2 324 -47 - 19 8 10 - 18 37 43 - 19 36 24 - 18 9 18 - 19 42 39 -31 0 0 24 14 29 3 325 -48 - 19 57 37 - 19 27 39 - 20 25 25 - 18 59 42 - 20 31 5 -30 0 0 24 14 29 5 325 -48 - 20 45 50 - 20 16 19 - 21 13 13 - 19 48 47 - 21 18 20 -29 0 0 24 14 28 6 326 -49 - 21 32 53 - 21 3 47 - 21 59 52 - 20 36 38 - 22 4 30 -28 0 0 24 14 27 7 326 -49 - 22 18 50 - 21 50 8 - 22 45 28 - 21 23 22 - 22 49 38 -27 0 0 24 14 25 8 326 -50 - 23 3 47 - 22 35 27 - 23 30 4 - 22 9 2 - 23 33 48 -26 0 0 24 14 24 9 327 -50 - 23 47 47 - 23 19 48 - 24 13 45 - 22 53 43 - 24 17 5 -25 0 0 24 14 22 11 327 -50 - 24 30 54 - 24 3 14 - 24 56 34 - 23 37 28 - 24 59 31 -24 0 0 24 14 20 12 327 -51 - 25 13 11 - 24 45 50 - 25 38 34 - 24 20 21 - 25 41 11 -23 0 0 24 14 18 13 328 -51 - 25 54 42 - 25 27 38 - 26 19 49 - 25 2 25 - 26 22 6 -22 0 0 24 14 16 14 328 -51 - 26 35 30 - 26 8 42 - 27 0 22 - 25 43 44 - 27 2 21 -21 0 0 24 14 13 15 328 -52 - 27 15 37 - 26 49 5 - 27 40 16 - 26 24 21 - 27 41 58 -20 0 0 24 14 11 16 328 -52 - 27 55 7 - 27 28 49 - 28 19 32 - 27 4 19 - 28 20 59 -19 0 0 24 14 8 18 329 -52 - 28 34 2 - 28 7 57 - 28 58 15 - 27 43 39 - 28 59 28 -18 0 0 24 14 5 19 329 -52 - 29 12 24 - 28 46 31 - 29 36 26 - 28 22 25 - 29 37 25 -17 0 0 24 14 1 20 329 -52 - 29 50 16 - 29 24 35 - 30 14 7 - 29 0 40 - 30 14 55 -16 0 0 24 13 58 21 329 -53 - 30 27 40 - 30 2 9 - 30 51 21 - 29 38 25 - 30 51 58 -15 0 0 24 13 54 22 329 -53 - 31 4 38 - 30 39 17 - 31 28 10 - 30 15 42 - 31 28 37 -14 0 0 24 13 51 23 330 -53 - 31 41 12 - 31 16 1 - 32 4 36 - 30 52 34 - 32 4 54 -13 0 0 24 13 47 25 330 -53 - 32 17 25 - 31 52 22 - 32 40 41 - 31 29 3 - 32 40 50 -12 0 0 24 13 42 26 330 -53 - 32 53 17 - 32 28 22 - 33 16 27 - 32 5 11 - 33 16 28 -11 0 0 24 13 38 27 330 -53 - 33 28 52 - 33 4 4 - 33 51 55 - 32 40 59 - 33 51 50 -10 0 0 24 13 34 28 330 -52 - 34 4 10 - 33 39 29 - 34 27 7 - 33 16 30 - 34 26 56 - 9 0 0 24 13 29 29 330 -52 - 34 39 14 - 34 14 38 - 35 2 6 - 33 51 44 - 35 1 50 - 8 0 0 24 13 24 30 330 -52 - 35 14 5 - 34 49 34 - 35 36 52 - 34 26 45 - 35 36 31 - 7 0 0 24 13 19 32 330 -52 - 35 48 45 - 35 24 18 - 36 11 28 - 35 1 33 - 36 11 3 - 6 0 0 24 13 14 33 330 -52 - 36 23 15 - 35 58 52 - 36 45 55 - 35 36 11 - 36 45 27 - 5 0 0 24 13 8 34 331 -52 - 36 57 37 - 36 33 17 - 37 20 14 - 36 10 39 - 37 19 44 - 4 0 0 24 13 3 35 331 -51 - 37 31 53 - 37 7 36 - 37 54 28 - 36 45 0 - 37 53 57 - 3 0 0 24 12 57 36 331 -51 - 38 6 4 - 37 41 49 - 38 28 38 - 37 19 15 - 38 28 5 - 2 0 0 24 12 51 37 331 -51 - 38 40 12 - 38 15 58 - 39 2 44 - 37 53 26 - 39 2 12 - 1 0 0 24 12 45 39 331 -50 - 39 14 18 - 38 50 5 - 39 36 50 - 38 27 33 - 39 36 18 0 0 0 24 12 39 40 331 -50 - 39 48 24 - 39 24 11 - 40 10 56 - 39 1 40 - 40 10 25 1 0 0 24 12 33 41 331 -50 - 40 22 32 - 39 58 18 - 40 45 4 - 39 35 46 Latitude Latitude Latitude Latitude - 42 0 0 4 11 56 24 12 12 45 331 -48 3 50 43 4 33 8 3 11 16 5 12 33 - 43 0 0 5 56 8 24 12 0 47 331 -47 5 35 0 6 17 15 4 55 42 6 56 31 - 44 0 0 7 39 24 24 11 47 49 331 -46 7 18 23 8 0 25 6 39 16 8 39 30 - 45 0 0 9 21 32 24 11 34 51 331 -45 9 0 38 9 42 25 8 21 45 10 21 16 - 46 0 0 11 2 18 24 11 21 53 331 -44 10 41 33 11 23 3 10 2 55 12 1 37 - 47 0 0 12 41 31 24 11 8 54 331 -43 12 20 55 13 2 6 11 42 36 13 40 23 - 48 0 0 14 19 1 24 10 55 56 330 -42 13 58 36 14 39 25 13 20 36 15 17 22 - 49 0 0 15 54 37 24 10 42 58 330 -41 15 34 24 16 14 50 14 56 45 16 52 26 - 50 0 0 17 28 13 24 10 28 60 330 -40 17 8 12 17 48 14 16 30 56 18 25 26 - 51 0 0 18 59 41 24 10 15 62 330 -39 18 39 53 19 19 29 18 3 2 19 56 17 - 52 0 0 20 28 56 24 10 1 64 330 -38 20 9 21 20 48 30 19 32 55 21 24 53 - 53 0 0 21 55 52 24 9 48 65 330 -36 21 36 32 22 15 12 21 0 32 22 51 9 - 54 0 0 23 20 27 24 9 35 67 330 -35 23 1 21 23 39 33 22 25 48 24 15 2 - 55 0 0 24 42 38 24 9 22 69 330 -34 24 23 47 25 1 29 23 48 41 25 36 31 - 56 0 0 26 2 24 24 9 9 70 330 -33 25 43 48 26 21 0 25 9 10 26 55 34 - 57 0 0 27 19 44 24 8 56 72 330 -32 27 1 23 27 38 5 26 27 13 28 12 10 - 58 0 0 28 34 38 24 8 44 73 330 -31 28 16 32 28 52 43 27 42 51 29 26 21 - 59 0 0 29 47 7 24 8 32 75 330 -30 29 29 16 30 4 57 28 56 3 30 38 7 - 60 0 0 30 57 13 24 8 19 76 330 -28 30 39 37 31 14 48 30 6 52 31 47 29 - 61 0 0 32 4 57 24 8 8 78 331 -27 31 47 36 32 22 17 31 15 20 32 54 31 - 62 0 0 33 10 22 24 7 56 79 331 -26 32 53 16 33 27 27 32 21 27 33 59 13 - 63 0 0 34 13 31 24 7 45 80 332 -25 33 56 40 34 30 22 33 25 18 35 1 40 - 64 0 0 35 14 26 24 7 34 82 334 -24 34 57 50 35 31 3 34 26 55 36 1 54 - 65 0 0 36 13 12 24 7 23 83 336 -23 35 56 49 36 29 34 35 26 21 36 59 59 - 66 0 0 37 9 50 24 7 12 84 339 -22 36 53 42 37 25 58 36 23 39 37 55 58 - 67 0 0 38 4 25 24 7 2 85 344 -21 37 48 30 38 20 20 37 18 53 38 49 54 - 68 0 0 38 57 1 24 6 52 85 353 -21 38 41 19 39 12 42 38 12 7 39 41 51 - 69 0 0 39 47 40 24 6 42 86 7 -20 39 32 12 40 3 8 39 3 23 40 31 54 - 70 0 0 40 36 27 24 6 33 86 32 -19 40 21 11 40 51 43 39 52 47 41 20 5 - 71 0 0 41 23 25 24 6 23 86 62 -18 41 8 22 41 38 29 40 40 20 42 6 27 - 72 0 0 42 8 38 24 6 14 86 84 -17 41 53 47 42 23 29 41 26 7 42 51 6 - 73 0 0 42 52 9 24 6 5 85 97 -16 42 37 30 43 6 49 42 10 12 43 34 4 - 74 0 0 43 34 2 24 5 57 85 104 -15 43 19 34 43 48 30 42 52 37 44 15 25 - 75 0 0 44 14 20 24 5 48 84 109 -15 44 0 3 44 28 37 43 33 27 44 55 11 - 76 0 0 44 53 6 24 5 40 83 112 -14 44 39 0 45 7 13 44 12 43 45 33 27 - 77 0 0 45 30 24 24 5 32 82 113 -13 45 16 28 45 44 21 44 50 31 46 10 15 - 78 0 0 46 6 17 24 5 24 81 115 -12 45 52 30 46 20 3 45 26 52 46 45 39 - 79 0 0 46 40 47 24 5 17 81 115 -12 46 27 10 46 54 23 46 1 49 47 19 42 - 80 0 0 47 13 57 24 5 9 80 116 -11 47 0 29 47 27 24 46 35 26 47 52 26 - 81 0 0 47 45 51 24 5 2 79 116 -10 47 32 32 47 59 9 47 7 46 48 23 53 - 82 0 0 48 16 30 24 4 55 78 116 -9 48 3 20 48 29 40 47 38 50 48 54 8 - 83 0 0 48 45 58 24 4 48 77 116 -9 48 32 56 48 58 59 48 8 42 49 23 12 - 84 0 0 49 14 16 24 4 41 76 116 -8 49 1 23 49 27 10 48 37 24 49 51 7 - 85 0 0 49 41 28 24 4 34 76 115 -7 49 28 43 49 54 14 49 4 58 50 17 57 - 86 0 0 50 7 35 24 4 28 75 115 -7 49 54 57 50 20 13 49 31 27 50 43 42 - 87 0 0 50 32 40 24 4 22 74 115 -6 50 20 9 50 45 11 49 56 52 51 8 26 - 88 0 0 50 56 44 24 4 15 73 114 -6 50 44 21 51 9 8 50 21 17 51 32 10 - 89 0 0 51 19 50 24 4 9 73 114 -5 51 7 33 51 32 7 50 44 42 51 54 57 - 90 0 0 51 41 59 24 4 4 72 113 -4 51 29 49 51 54 10 51 7 9 52 16 48 - 91 0 0 52 3 13 24 3 58 71 113 -4 51 51 9 52 15 18 51 28 41 52 37 44 - 92 0 0 52 23 34 24 3 52 71 112 -3 52 11 36 52 35 33 51 49 20 52 57 48 - 93 0 0 52 43 4 24 3 46 70 111 -3 52 31 11 52 54 56 52 9 5 53 17 1 - 94 0 0 53 1 43 24 3 41 69 111 -2 52 49 56 53 13 30 52 28 1 53 35 25 - 95 0 0 53 19 34 24 3 36 69 110 -1 53 7 52 53 31 15 52 46 6 53 53 0 - 96 0 0 53 36 37 24 3 30 68 109 -1 53 25 0 53 48 14 53 3 24 54 9 49 - 97 0 0 53 52 55 24 3 25 67 109 0 53 41 23 54 4 26 53 19 55 54 25 53 Uncertainty in time = +/- 3 secs [Prediction of 2008 Feb 27.0] Data for the target star ------------------------ * name: TYC 2934-01549-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 12 32.4318 DE: +42 09 58.922 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .020 ) * V mag [mag]: 11.5 * B mag [mag]: 12.3 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1116) Catriona approx. diameter [km]: 39 approx. diameter ["]: .030 distance from Earth [AU]: 1.80500 * orbital information: orbit source: Preston date of fit: 2008 Feb 27 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 678 number of rejected observations: 36 time covered by the observations: 1908 Jan 05 - 2008 Jan 23 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.016, 93° remarks: * orbital elements for (1116) Catriona : Mean anomaly = 22.40076389 deg Arg. of pericenter = 83.15125721 deg Long. of node = 356.58813883 deg Inclination = 16.53102057 deg Eccentricity = 0.23010261 Semimajor axis = 2.92295428 AU Perihelion dist = 2.25037489 AU Mag: H = 9.67, G = 0.15 Epoch of elements : MJD 54527.00500000 TDT (2008 Mar 02.005) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Mar 2 1116 Catriona 0h 6.5m UT 11.5 6 12 32.432 42 9 58.92TYC 2934-01549-1 12.3 13.9 39 3.0 1.805 2.265 -26.23 -68.6444 42.174 -178.57 -7.14 0.1079 -0.02576 -0.02409 5.16739 -5.38491 0.00528 -0.00078 2000 21.0191742008 224.00000 83.151257356.588139 16.5310210.23010261 2.9229543 2.2503749 9.7 5.00.15 RATE 1.9722910 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.026 91 1.93 0.028 0 54523.5020080302_1549-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Feb 27, 19:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org