IOTA/IOTA-ES occultation update for (683) Lanzia / TYC 5754-01719-1 event on 2008 May 15, 21:12 UT Visible from Indonesia Summary ------- On 2008 May 15 UT, the 83 km diameter asteroid (683) Lanzia will occult a 11.7 mag star in the constellation Aquila for observers along a path across Indonesia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.2 mag to 13.7 mag (the magnitude of the asteroid) for at most 7.4 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: 69 * date and approx. time of event: 2008 May 15, 21:03 - 2008 May 15, 21:16 UT * midpoint of event [JD]: 2454602.38430833 * magnitude of target star: 11.7 * magnitude drop [mag]: 2.2 * estimated maximum duration [s]: 7.4 * Moon: 84 % sunlit, 120° distance * Sun: 107° distance * rough path description: Indonesia The occultation path -------------------- * approximate projected width [km]: 83 * 1 sigma uncertainty interval [path widths]: +/- 0.86 * 1 sigma uncertainty interval [seconds]: +/- 6.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .037 +/- .034) * 1 sigma uncertainty ellipse (major, minor, PA): ( .037", .033", 80° ) * approx speed of asteroid's shadow [km/s]: 11.1794 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5754-01719-1 by 683 Lanzia on 2008 May 15 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 Latitude Latitude Latitude Latitude 125 0 0 11 39 33 21 16 56 68 210 -1 10 36 27 12 42 23 8 47 18 14 29 57 124 0 0 9 3 4 21 16 30 71 211 -3 7 58 49 10 7 4 6 7 42 11 56 37 123 0 0 6 22 19 21 16 3 74 212 -5 5 17 3 7 27 21 3 24 11 9 18 42 122 0 0 3 38 1 21 15 34 76 214 -7 2 31 53 4 43 55 0 37 32 6 36 48 121 0 0 0 50 57 21 15 5 79 217 -9 - 0 15 53 1 57 33 - 2 11 22 3 51 41 120 0 0 - 1 57 57 21 14 36 82 223 -11 - 3 5 15 - 0 50 50 - 5 1 32 1 4 11 119 0 0 - 4 47 40 21 14 6 85 235 -12 - 5 55 14 - 3 40 16 - 7 51 55 - 1 44 43 118 0 0 - 7 37 10 21 13 36 87 269 -14 - 8 44 46 - 6 29 43 -10 41 27 - 4 34 0 117 0 0 -10 25 23 21 13 6 87 325 -16 -11 32 47 - 9 18 6 -13 29 5 - 7 22 37 116 0 0 -13 11 19 21 12 36 84 352 -18 -14 18 19 -12 4 26 -16 13 50 -10 9 34 115 0 0 -15 54 3 21 12 8 82 3 -20 -17 0 25 -14 47 45 -18 54 49 -12 53 52 114 0 0 -18 32 44 21 11 40 79 8 -22 -19 38 19 -17 27 14 -21 31 17 -15 34 38 113 0 0 -21 6 43 21 11 13 76 11 -23 -22 11 20 -20 2 9 -24 2 37 -18 11 8 112 0 0 -23 35 27 21 10 47 74 13 -25 -24 38 58 -22 31 57 -26 28 21 -20 42 45 111 0 0 -25 58 31 21 10 23 71 15 -26 -27 0 51 -24 56 12 -28 48 8 -23 9 0 110 0 0 -28 15 40 21 9 59 69 16 -27 -29 16 44 -27 14 37 -31 1 49 -25 29 33 109 0 0 -30 26 45 21 9 38 66 18 -29 -31 26 29 -29 27 0 -33 9 17 -27 44 12 108 0 0 -32 31 43 21 9 17 64 19 -30 -33 30 6 -31 33 19 -35 10 33 -29 52 49 107 0 0 -34 30 37 21 8 58 62 20 -31 -35 27 38 -33 33 35 -37 5 43 -31 55 26 106 0 0 -36 23 34 21 8 40 60 21 -32 -37 19 13 -35 27 54 -38 54 56 -33 52 6 105 0 0 -38 10 43 21 8 23 58 21 -33 -39 5 0 -37 16 25 -40 38 23 -35 42 56 104 0 0 -39 52 17 21 8 7 56 22 -33 -40 45 14 -38 59 18 -42 16 19 -37 28 8 103 0 0 -41 28 29 21 7 53 54 23 -34 -42 20 8 -40 36 49 -43 48 58 -39 7 53 102 0 0 -42 59 33 21 7 39 52 24 -35 -43 49 56 -42 9 10 -45 16 35 -40 42 26 101 0 0 -44 25 46 21 7 26 51 25 -35 -45 14 55 -43 36 37 -46 39 26 -42 12 1 100 0 0 -45 47 22 21 7 14 49 26 -36 -46 35 19 -44 59 25 -47 57 47 -43 36 52 99 0 0 -47 4 36 21 7 3 48 27 -36 -47 51 24 -46 17 48 -49 11 53 -44 57 15 98 0 0 -48 17 43 21 6 53 46 28 -37 -49 3 24 -47 32 2 -50 21 59 -46 13 24 97 0 0 -49 26 58 21 6 44 45 28 -37 -50 11 35 -48 42 21 -51 28 19 -47 25 34 96 0 0 -50 32 33 21 6 35 44 29 -38 -51 16 8 -49 48 58 -52 31 7 -48 33 57 95 0 0 -51 34 42 21 6 26 43 30 -38 -52 17 19 -50 52 6 -53 30 36 -49 38 47 94 0 0 -52 33 38 21 6 19 41 31 -38 -53 15 17 -51 51 58 -54 26 57 -50 40 17 93 0 0 -53 29 31 21 6 11 40 32 -38 -54 10 16 -52 48 46 -55 20 23 -51 38 39 92 0 0 -54 22 33 21 6 4 39 33 -39 -55 2 26 -53 42 40 -56 11 3 -52 34 2 91 0 0 -55 12 54 21 5 58 38 34 -39 -55 51 57 -54 33 50 -56 59 8 -53 26 39 90 0 0 -56 0 43 21 5 52 37 34 -39 -56 38 58 -55 22 27 -57 44 48 -54 16 38 89 0 0 -56 46 10 21 5 46 36 35 -39 -57 23 40 -56 8 40 -58 28 11 -55 4 10 88 0 0 -57 29 22 21 5 41 35 36 -39 -58 6 8 -56 52 36 -59 9 24 -55 49 22 87 0 0 -58 10 29 21 5 36 34 37 -39 -58 46 33 -57 34 24 -59 48 37 -56 32 22 86 0 0 -58 49 36 21 5 31 34 38 -39 -59 25 0 -58 14 12 -60 25 55 -57 13 18 85 0 0 -59 26 51 21 5 27 33 39 -40 -60 1 37 -58 52 5 -61 1 26 -57 52 18 84 0 0 -60 2 20 21 5 23 32 40 -40 -60 36 29 -59 28 11 -61 35 15 -58 29 27 83 0 0 -60 36 9 21 5 19 31 41 -40 -61 9 43 -60 2 35 -62 7 28 -59 4 52 82 0 0 -61 8 23 21 5 15 31 42 -40 -61 41 23 -60 35 23 -62 38 11 -59 38 38 81 0 0 -61 39 8 21 5 12 30 42 -40 -62 11 36 -61 6 41 -63 7 28 -60 10 51 80 0 0 -62 8 28 21 5 8 29 43 -40 -62 40 26 -61 36 32 -63 35 24 -60 41 35 79 0 0 -62 36 29 21 5 5 28 44 -40 -63 7 56 -62 5 1 -64 2 4 -61 10 56 78 0 0 -63 3 13 21 5 2 28 45 -40 -63 34 12 -62 32 14 -64 27 31 -61 38 57 77 0 0 -63 28 44 21 4 59 27 46 -40 -63 59 16 -62 58 13 -64 51 49 -62 5 43 76 0 0 -63 53 8 21 4 56 27 47 -40 -64 23 14 -63 23 2 -65 15 1 -62 31 17 75 0 0 -64 16 26 21 4 54 26 48 -40 -64 46 7 -63 46 45 -65 37 11 -62 55 43 74 0 0 -64 38 42 21 4 51 25 49 -40 -65 7 59 -64 9 25 -65 58 22 -63 19 4 73 0 0 -64 59 59 21 4 49 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59 0 0 -68 35 40 21 4 25 18 63 -40 -69 0 39 -68 10 42 -69 43 38 -67 27 45 58 0 0 -68 46 22 21 4 23 18 64 -39 -69 11 9 -68 21 35 -69 53 47 -67 38 59 57 0 0 -68 56 32 21 4 22 17 65 -39 -69 21 8 -68 31 56 -70 3 27 -67 49 39 56 0 0 -69 6 12 21 4 21 17 66 -39 -69 30 37 -68 41 48 -70 12 39 -67 59 49 55 0 0 -69 15 24 21 4 20 17 66 -39 -69 39 39 -68 51 10 -70 21 23 -68 9 28 54 0 0 -69 24 8 21 4 19 16 67 -39 -69 48 13 -69 0 3 -70 29 40 -68 18 38 53 0 0 -69 32 24 21 4 18 16 68 -39 -69 56 20 -69 8 28 -70 37 32 -68 27 20 52 0 0 -69 40 14 21 4 17 16 69 -39 -70 4 2 -69 16 27 -70 44 58 -68 35 33 51 0 0 -69 47 39 21 4 16 15 70 -39 -70 11 18 -69 24 0 -70 52 0 -68 43 20 50 0 0 -69 54 38 21 4 15 15 71 -39 -70 18 9 -69 31 7 -70 58 38 -68 50 40 49 0 0 -70 1 12 21 4 14 14 72 -39 -70 24 37 -69 37 49 -71 4 53 -68 57 35 48 0 0 -70 7 23 21 4 13 14 73 -39 -70 30 41 -69 44 7 -71 10 45 -69 4 5 47 0 0 -70 13 11 21 4 12 14 74 -39 -70 36 22 -69 50 0 -71 16 15 -69 10 10 46 0 0 -70 18 36 21 4 11 13 75 -39 -70 41 40 -69 55 31 -71 21 23 -69 15 51 45 0 0 -70 23 38 21 4 11 13 76 -39 -70 46 37 -70 0 39 -71 26 10 -69 21 8 44 0 0 -70 28 18 21 4 10 13 77 -39 -70 51 12 -70 5 25 -71 30 37 -69 26 3 43 0 0 -70 32 37 21 4 9 12 78 -39 -70 55 26 -70 9 48 -71 34 42 -69 30 35 42 0 0 -70 36 35 21 4 8 12 79 -38 -70 59 19 -70 13 50 -71 38 28 -69 34 44 41 0 0 -70 40 11 21 4 8 12 80 -38 -71 2 52 -70 17 31 -71 41 54 -69 38 32 40 0 0 -70 43 27 21 4 7 11 81 -38 -71 6 4 -70 20 51 -71 45 0 -69 41 58 39 0 0 -70 46 23 21 4 6 11 82 -38 -71 8 57 -70 23 50 -71 47 47 -69 45 2 38 0 0 -70 48 59 21 4 6 11 83 -38 -71 11 30 -70 26 28 -71 50 14 -69 47 46 37 0 0 -70 51 15 21 4 5 10 83 -38 -71 13 43 -70 28 47 -71 52 23 -69 50 9 36 0 0 -70 53 11 21 4 4 10 84 -38 -71 15 37 -70 30 45 -71 54 14 -69 52 11 35 0 0 -70 54 47 21 4 4 10 85 -38 -71 17 12 -70 32 23 -71 55 45 -69 53 52 34 0 0 -70 56 5 21 4 3 9 86 -38 -71 18 28 -70 33 42 -71 56 59 -69 55 13 33 0 0 -70 57 2 21 4 3 9 87 -38 -71 19 24 -70 34 41 -71 57 54 -69 56 14 32 0 0 -70 57 41 21 4 2 9 88 -38 -71 20 2 -70 35 20 -71 58 31 -69 56 54 31 0 0 -70 58 1 21 4 2 8 89 -38 -71 20 22 -70 35 40 -71 58 49 -69 57 15 30 0 0 -70 58 1 21 4 1 8 90 -38 -71 20 22 -70 35 40 -71 58 50 -69 57 15 29 0 0 -70 57 42 21 4 1 8 91 -37 -71 20 4 -70 35 21 -71 58 32 -69 56 56 28 0 0 -70 57 4 21 4 1 7 92 -37 -71 19 27 -70 34 43 -71 57 56 -69 56 16 27 0 0 -70 56 7 21 4 0 7 93 -37 -71 18 31 -70 33 45 -71 57 2 -69 55 16 26 0 0 -70 54 51 21 4 0 7 94 -37 -71 17 16 -70 32 27 -71 55 49 -69 53 56 25 0 0 -70 53 15 21 3 59 6 95 -37 -71 15 42 -70 30 49 -71 54 19 -69 52 15 24 0 0 -70 51 20 21 3 59 6 96 -37 -71 13 49 -70 28 52 -71 52 29 -69 50 14 23 0 0 -70 49 5 21 3 59 6 97 -37 -71 11 37 -70 26 35 -71 50 21 -69 47 52 22 0 0 -70 46 31 21 3 58 5 98 -37 -71 9 5 -70 23 57 -71 47 55 -69 45 10 21 0 0 -70 43 36 21 3 58 5 99 -37 -71 6 14 -70 21 0 -71 45 9 -69 42 7 20 0 0 -70 40 22 21 3 58 5 99 -37 -71 3 2 -70 17 41 -71 42 4 -69 38 42 19 0 0 -70 36 46 21 3 57 4 100 -37 -70 59 31 -70 14 2 -71 38 40 -69 34 56 18 0 0 -70 32 50 21 3 57 4 101 -36 -70 55 40 -70 10 2 -71 34 56 -69 30 48 17 0 0 -70 28 33 21 3 57 4 102 -36 -70 51 27 -70 5 40 -71 30 52 -69 26 18 16 0 0 -70 23 55 21 3 57 3 103 -36 -70 46 54 -70 0 56 -71 26 27 -69 21 26 15 0 0 -70 18 55 21 3 57 3 104 -36 -70 41 59 -69 55 50 -71 21 42 -69 16 10 14 0 0 -70 13 32 21 3 56 3 105 -36 -70 36 43 -69 50 22 -71 16 36 -69 10 32 13 0 0 -70 7 47 21 3 56 2 106 -36 -70 31 4 -69 44 31 -71 11 8 -69 4 29 12 0 0 -70 1 39 21 3 56 2 107 -36 -70 25 3 -69 38 16 -71 5 19 -68 58 3 11 0 0 -69 55 7 21 3 56 2 108 -36 -70 18 38 -69 31 37 -70 59 7 -68 51 11 10 0 0 -69 48 11 21 3 56 1 109 -35 -70 11 50 -69 24 33 -70 52 32 -68 43 55 9 0 0 -69 40 51 21 3 56 1 110 -35 -70 4 38 -69 17 4 -70 45 33 -68 36 12 8 0 0 -69 33 5 21 3 56 0 111 -35 -69 57 0 -69 9 10 -70 38 10 -68 28 3 7 0 0 -69 24 53 21 3 56 0 112 -35 -69 48 57 .. .. .. -70 30 23 .. .. .. Uncertainty in time = +/- 6 secs [Prediction of 2008 Feb 17.0] Data for the target star ------------------------ * name: TYC 5754-01719-1 * constellation : Aquila * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 28 57.2247 DE: -07 39 36.981 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .030, .031 ) * V mag [mag]: 11.7 * B mag [mag]: 13.2 * Apparent position with proper motion RA(deg): 307.3550830407 DE(deg): -7.6336285265 * Equation of equinoxes (radians) : 0.000040015849559 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (683) Lanzia approx. diameter [km]: 83 approx. diameter ["]: .042 distance from Earth [AU]: 2.70700 * orbital information: orbit source: Preston date of fit: 2008 Feb 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 716 number of rejected observations: 51 time covered by the observations: 1913 Apr 03 - 2007 Sep 09 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.014, 62° remarks: * orbital elements for (683) Lanzia : Mean anomaly = 100.37990289 deg Arg. of pericenter = 284.96804639 deg Long. of node = 259.85226044 deg Inclination = 18.51845797 deg Eccentricity = 0.05195968 Semimajor axis = 3.12089035 AU Perihelion dist = 2.95872990 AU Mag: H = 8.60, G = 0.15 Epoch of elements : MJD 54601.88400000 TDT (2008 May 15.884) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 15 683 Lanzia 21h 13.4m UT 11.7 20 28 57.225- 7 39 36.98TYC 5754-01719-1 13.2 13.7 83 7.4 2.707 0.518 18.99 114.9223 -7.666 -139.26 19.11 21.2234 0.04457 -0.01740 2.37416 5.84626 -0.00516 -0.00165 2000 100.0431072008 514.00000284.968046259.852260 18.5184580.05195968 3.1208904 2.9587299 8.1 5.00.15 RATE 1.7876650 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.037 0.033 80 1.86 0.036 0 54513.5020080515_1719-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 09, 17:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org