IOTA/IOTA-ES occultation update for (393) Lampetia / TYC 5658-00102-1 event on 2009 May 07, 06:31 UT Visible from Mexico, W USA Summary ------- On 2009 May 07 UT, the 97 km diameter asteroid (393) Lampetia will occult a 11.8 mag star in the constellation Ophiuchus for observers along a path across Mexico, W USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.5 mag to 11.3 mag (the magnitude of the asteroid) for at most 11.8 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: 92 * date and approx. time of event: 2009 May 07, 06:20 - 2009 May 07, 06:41 UT * midpoint of event [JD]: 2454958.77175 * magnitude of target star: 11.8 * magnitude drop [mag]: 0.5 * estimated maximum duration [s]: 11.8 * Moon: 96 % sunlit, 59° distance * Sun: 143° distance * rough path description: Mexico, W USA The occultation path -------------------- * approximate projected width [km]: 119 * 1 sigma uncertainty interval [path widths]: +/- 0.49 * 1 sigma uncertainty interval [seconds]: +/- 4.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .054 +/- .039) * 1 sigma uncertainty ellipse (major, minor, PA): ( .054", .039", 85° ) * approx speed of asteroid's shadow [km/s]: 8.1842 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5658-00102-1 by 393 Lampetia on 2009 May 7 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude -151 44 29 -61 42 58 6 20 55 7 96 -31 -157 29 52 -60 55 17 -147 42 3 -62 13 31 ... .. .. .. .. .. -144 24 54 -62 36 34 -139 42 58 -61 8 14 6 21 11 12 86 -36 -142 23 48 -60 51 11 -137 15 31 -61 22 54 -145 19 42 -60 31 17 -135 0 51 -61 35 28 -132 16 18 -59 57 5 6 21 27 16 80 -40 -134 18 41 -59 46 23 -130 19 57 -60 6 40 -136 25 45 -59 34 34 -128 30 52 -60 15 7 -126 48 34 -58 34 30 6 21 43 19 75 -43 -128 31 16 -58 26 55 -125 9 32 -58 41 23 -130 16 1 -58 18 41 -123 35 37 -58 47 30 -122 32 59 -57 7 13 6 21 59 22 72 -45 -124 3 3 -57 1 31 -121 5 28 -57 12 24 -125 34 5 -56 55 24 -119 41 57 -57 17 1 -119 6 41 -55 38 4 6 22 15 24 69 -48 -120 27 44 -55 33 39 -117 47 33 -55 42 4 -121 49 13 -55 28 56 -116 31 44 -55 45 39 -116 16 15 -54 8 27 6 22 31 26 67 -50 -117 30 27 -54 4 58 -115 3 35 -54 11 36 -118 44 46 -54 1 14 -113 53 45 -54 14 25 -113 53 3 -52 39 7 6 22 47 28 66 -52 -115 1 49 -52 36 20 -112 45 32 -52 41 38 -116 10 32 -52 33 20 -111 40 30 -52 43 51 -111 51 7 -51 10 29 6 23 3 30 64 -54 -112 55 29 -51 8 14 -110 47 49 -51 12 30 -113 59 39 -51 5 48 -109 46 46 -51 14 15 -110 6 12 -49 42 44 6 23 19 32 63 -55 -111 6 53 -49 40 55 -109 6 26 -49 44 21 -112 7 18 -49 38 56 -108 8 43 -49 45 45 -108 35 10 -48 16 1 6 23 35 33 63 -57 -109 32 45 -48 14 33 -107 38 24 -48 17 19 -110 29 59 -48 12 55 -106 43 31 -48 18 25 -107 15 38 -46 50 21 6 23 51 35 62 -59 -108 10 32 -46 49 10 -106 21 27 -46 51 23 -109 5 4 -46 47 50 -105 29 0 -46 52 14 -106 5 43 -45 25 45 6 24 7 36 62 -60 -106 58 18 -45 24 48 -105 13 47 -45 26 33 -107 50 29 -45 23 43 -104 23 29 -45 27 13 -105 4 0 -44 2 11 6 24 23 38 62 -62 -105 54 33 -44 1 26 -104 14 2 -44 2 49 -106 44 41 -44 0 33 -103 25 37 -44 3 18 -104 9 18 -42 39 39 6 24 39 39 62 -64 -104 58 3 -42 39 3 -103 21 5 -42 40 7 -105 46 23 -42 38 21 -102 34 20 -42 40 27 -103 20 41 -41 18 4 6 24 55 40 62 -65 -104 7 50 -41 17 37 -102 34 1 -41 18 24 -104 54 33 -41 17 4 -101 48 45 -41 18 37 -102 37 22 -39 57 24 6 25 11 41 62 -66 -103 23 6 -39 57 5 -101 52 6 -39 57 37 -104 8 23 -39 56 39 -101 8 10 -39 57 44 -101 58 44 -38 37 37 6 25 27 42 63 -68 -102 43 11 -38 37 24 -101 14 43 -38 37 44 -103 27 10 -38 37 5 -100 31 59 -38 37 46 -101 24 14 -37 18 40 6 25 43 43 63 -69 -102 7 32 -37 18 32 -100 41 21 -37 18 42 -102 50 21 -37 18 19 - 99 59 42 -37 18 38 -100 53 26 -36 0 29 6 25 59 44 64 -71 -101 35 40 -36 0 26 -100 11 35 -36 0 26 -102 17 27 -36 0 18 - 99 30 55 -36 0 19 -100 25 56 -34 43 2 6 26 15 45 64 -72 -101 7 14 -34 43 3 - 99 45 1 -34 42 55 -101 48 3 -34 42 59 - 99 5 15 -34 42 44 -100 1 26 -33 26 15 6 26 31 46 65 -73 -100 41 51 -33 26 20 - 99 21 22 -33 26 5 -101 21 49 -33 26 20 - 98 42 25 -33 25 51 - 99 39 39 -32 10 7 6 26 47 47 66 -75 -100 19 17 -32 10 15 - 99 0 22 -32 9 54 -100 58 26 -32 10 18 - 98 22 10 -32 9 36 - 99 20 21 -30 54 34 6 27 3 48 67 -76 - 99 59 15 -30 54 45 - 98 41 46 -30 54 18 -100 37 41 -30 54 51 - 98 4 15 -30 53 58 - 99 3 19 -29 39 34 6 27 19 49 68 -77 - 99 41 33 -29 39 48 - 98 25 23 -29 39 16 -100 19 19 -29 39 56 - 97 48 30 -29 38 54 - 98 48 22 -28 25 4 6 27 35 49 69 -78 - 99 25 59 -28 25 20 - 98 11 3 -28 24 44 -100 3 9 -28 25 31 - 97 34 45 -28 24 20 - 98 35 22 -27 11 3 6 27 51 50 70 -80 - 99 12 26 -27 11 21 - 97 58 36 -27 10 41 - 99 49 1 -27 11 34 - 97 22 49 -27 10 15 - 98 24 10 -25 57 27 6 28 7 51 71 -81 - 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98 55 5 -16 20 48 - 96 42 2 -16 18 55 - 97 49 17 -15 8 43 6 30 31 54 84 -88 - 98 22 47 -15 9 10 - 97 16 2 -15 8 12 - 98 55 50 -15 9 32 - 96 43 39 -15 7 39 - 97 51 36 -13 57 33 6 30 47 54 86 -87 - 98 24 54 -13 58 0 - 97 18 32 -13 57 2 - 98 57 45 -13 58 23 - 96 46 21 -13 56 29 - 97 55 1 -12 46 27 6 31 3 54 88 -86 - 98 28 8 -12 46 55 - 97 22 7 -12 45 57 - 99 0 49 -12 47 18 - 96 50 6 -12 45 23 - 97 59 30 -11 35 25 6 31 19 54 89 -85 - 98 32 28 -11 35 52 - 97 26 46 -11 34 54 - 99 5 0 -11 36 15 - 96 54 53 -11 34 21 - 98 5 3 -10 24 22 6 31 35 54 91 -83 - 98 37 53 -10 24 49 - 97 32 26 -10 23 52 - 99 10 18 -10 25 12 - 97 0 41 -10 23 19 - 98 11 39 - 9 13 19 6 31 51 54 92 -82 - 98 44 23 - 9 13 46 - 97 39 9 - 9 12 49 - 99 16 41 - 9 14 8 - 97 7 30 - 9 12 16 - 98 19 18 - 8 2 13 6 32 7 54 94 -81 - 98 51 57 - 8 2 39 - 97 46 53 - 8 1 43 - 99 24 10 - 8 3 1 - 97 15 19 - 8 1 10 - 98 28 0 - 6 51 1 6 32 23 54 96 -80 - 99 0 36 - 6 51 27 - 97 55 39 - 6 50 32 - 99 32 45 - 6 51 49 - 97 24 8 - 6 50 0 - 98 37 45 - 5 39 44 6 32 39 54 97 -79 - 99 10 18 - 5 40 9 - 98 5 26 - 5 39 15 - 99 42 25 - 5 40 30 - 97 33 58 - 5 38 43 - 98 48 34 - 4 28 17 6 32 55 53 99 -78 - 99 21 6 - 4 28 42 - 98 16 16 - 4 27 49 - 99 53 12 - 4 29 3 - 97 44 49 - 4 27 18 - 99 0 28 - 3 16 41 6 33 11 53 100 -76 - 99 33 0 - 3 17 5 - 98 28 10 - 3 16 13 -100 5 6 - 3 17 24 - 97 56 43 - 3 15 43 - 99 13 27 - 2 4 52 6 33 27 53 102 -75 - 99 46 1 - 2 5 14 - 98 41 7 - 2 4 25 -100 18 9 - 2 5 33 - 98 9 39 - 2 3 56 - 99 27 34 - 0 52 48 6 33 43 52 103 -74 -100 0 10 - 0 53 10 - 98 55 11 - 0 52 22 -100 32 21 - 0 53 27 - 98 23 41 - 0 51 54 - 99 42 50 0 19 33 6 33 59 52 105 -73 -100 15 30 0 19 12 - 99 10 23 0 19 57 -100 47 46 0 18 55 - 98 38 48 0 20 24 - 99 59 17 1 32 12 6 34 15 51 106 -72 -100 32 4 1 31 53 - 99 26 45 1 32 35 -101 4 25 1 31 38 - 98 55 5 1 33 1 -100 16 58 2 45 13 6 34 31 51 108 -70 -100 49 52 2 44 55 - 99 44 19 2 45 35 -101 22 22 2 44 41 - 99 12 32 2 45 59 -100 35 57 3 58 37 6 34 47 50 109 -69 -101 9 0 3 58 21 -100 3 9 3 58 58 -101 41 38 3 58 9 - 99 31 14 3 59 21 -100 56 16 5 12 28 6 35 3 49 110 -68 -101 29 30 5 12 14 -100 23 18 5 12 47 -102 2 20 5 12 3 - 99 51 13 5 13 8 -101 18 1 6 26 48 6 35 19 49 111 -67 -101 51 27 6 26 36 -100 44 50 6 27 4 -102 24 29 6 26 27 -100 12 34 6 27 24 -101 41 15 7 41 40 6 35 35 48 112 -65 -102 14 56 7 41 30 -101 7 50 7 41 54 -102 48 13 7 41 24 -100 35 21 7 42 12 -102 6 5 8 57 7 6 35 51 47 113 -64 -102 40 3 8 56 59 -101 32 24 8 57 19 -103 13 36 8 56 56 -100 59 39 8 57 34 -102 32 36 10 13 12 6 36 7 46 114 -63 -103 6 53 10 13 7 -101 58 37 10 13 21 -103 40 46 10 13 7 -101 25 35 10 13 35 -103 0 57 11 30 0 6 36 23 45 115 -62 -103 35 35 11 29 58 -102 26 37 11 30 6 -104 9 50 11 30 1 -101 53 14 11 30 16 -103 31 15 12 47 33 6 36 39 44 116 -60 -104 6 18 12 47 35 -102 56 31 12 47 36 -104 40 58 12 47 41 -102 22 47 12 47 43 -104 3 40 14 5 57 6 36 55 43 117 -59 -104 39 11 14 6 3 -103 28 30 14 5 57 -105 14 19 14 6 13 -102 54 20 14 6 0 -104 38 25 15 25 16 6 37 11 42 118 -57 -105 14 27 15 25 26 -104 2 44 15 25 11 -105 50 6 15 25 41 -103 28 6 15 25 11 -105 15 42 16 45 36 6 37 27 41 118 -56 -105 52 19 16 45 51 -104 39 27 16 45 26 -106 28 34 16 46 10 -104 4 17 16 45 22 -105 55 47 18 7 1 6 37 43 40 119 -55 -106 33 4 18 7 22 -105 18 54 18 6 47 -107 10 0 18 7 47 -104 43 7 18 6 37 -106 38 59 19 29 40 6 37 59 39 120 -53 -107 17 1 19 30 7 -106 1 22 19 29 19 -107 54 44 19 30 39 -105 24 54 19 29 4 -107 25 40 20 53 39 6 38 15 38 120 -52 -108 4 34 20 54 13 -106 47 13 20 53 11 -108 43 10 20 54 52 -106 9 58 20 52 50 -108 16 17 22 19 7 6 38 31 36 120 -50 -108 56 11 22 19 49 -107 36 54 22 18 31 -109 35 48 22 20 38 -106 58 45 22 18 2 -109 11 24 23 46 14 6 38 47 35 121 -49 -109 52 27 23 47 6 -108 30 55 23 45 29 -110 33 14 23 48 5 -107 51 45 23 44 52 -110 11 42 25 15 12 6 39 3 33 121 -47 -110 54 5 25 16 16 -109 29 56 25 14 16 -111 36 15 25 17 26 -108 49 35 25 13 28 -111 18 3 26 46 15 6 39 19 32 121 -45 -112 2 0 26 47 32 -110 34 47 26 45 6 -112 45 49 26 48 57 -109 53 1 26 44 6 -112 31 32 28 19 40 6 39 35 30 121 -44 -113 17 24 28 21 14 -111 46 29 28 18 15 -114 3 11 28 22 57 -111 3 3 28 17 1 -113 53 39 29 55 48 6 39 51 28 121 -42 -114 41 50 29 57 44 -113 6 25 29 54 4 -115 30 2 29 59 48 -112 21 0 29 52 33 -115 26 24 31 35 8 6 40 7 26 120 -40 -116 17 28 31 37 30 -114 36 28 31 33 0 -117 8 44 31 40 3 -113 48 33 31 31 6 -117 12 35 33 18 17 6 40 23 24 120 -38 -118 7 25 33 21 13 -116 19 11 33 15 37 -119 2 41 33 24 23 -115 28 8 33 13 14 -119 16 27 35 6 6 6 40 39 22 119 -35 -120 16 22 35 9 50 -118 18 26 35 2 43 -121 17 8 35 13 52 -117 23 13 34 59 42 -121 44 49 36 59 55 6 40 55 19 118 -33 -122 52 7 37 4 49 -120 40 13 36 55 29 -124 1 5 37 10 10 -119 39 12 36 51 34 -124 49 57 39 2 0 6 41 11 16 116 -30 -126 9 18 39 8 49 -123 35 2 38 55 55 -127 32 15 39 16 24 -122 25 12 38 50 36 -128 59 3 41 17 3 6 41 27 13 114 -27 -130 43 4 41 27 51 -127 24 36 41 7 51 -132 37 57 41 40 34 -125 59 6 41 0 1 -135 49 39 44 1 12 6 41 43 7 109 -22 -139 30 7 44 30 37 -133 13 28 43 42 5 ... .. .. .. .. .. -131 7 43 43 27 46 Uncertainty in time = +/- 6 secs Prediction of 2009 Apr 4.0 Data for the target star ------------------------ * name: TYC 5658-00102-1 * constellation : Ophiuchus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 17 24 32.8662 DE: -08 49 56.996 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .032, .034 ) * V mag [mag]: 11.8 * B mag [mag]: 12.2 * Apparent position with proper motion RA(deg): 261.2727195265 DE(deg): -8.8431990138 * Equation of equinoxes (radians) : 0.000056486943189 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (393) Lampetia approx. diameter [km]: 97 approx. diameter ["]: .111 distance from Earth [AU]: 1.20200 * orbital information: orbit source: Preston date of fit: 2009 Apr 02 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 753 number of rejected observations: 112 time covered by the observations: 1903 Sep 21 - 2009 Apr 01 1 sigma uncertainty ellipse (major, minor, PA): 0.044, 0.020, 83° remarks: * orbital elements for (393) Lampetia : Mean anomaly = 330.28830029 deg Arg. of pericenter = 91.16435527 deg Long. of node = 212.48286622 deg Inclination = 14.87440703 deg Eccentricity = 0.33207554 Semimajor axis = 2.77743118 AU Perihelion dist = 1.85511423 AU Mag: H = 8.38, G = 0.15 Epoch of elements : MJD 54958.27200000 TDT (2009 May 07.272) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 May 7 393 Lampetia 6h 31.3m UT 11.8 17 24 32.866- 8 49 57.00TYC 5658-00102-1 12.2 11.3 97 11.8 1.202 -0.298 33.53 -61.9319 -8.842 81.31 16.87 6.5220 -0.57858 -0.07567 -0.60022 4.58022 -0.00299 -0.00088 2000 328.5269342009 429.00000 91.164355212.482866 14.8744070.33207554 2.7774312 1.8551142 8.4 5.00.15 RATE 2.1293110 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.054 0.039 85 1.49 0.054 0 54925.0020090507_0102-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2009 Apr 04, 03:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org