IOTA/IOTA-ES occultation update for (393) Lampetia / TYC 5658-00102-1 event on 2009 May 07, 06:31 UT Visible from 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 . 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: 90 * date and approx. time of event: 2009 May 07, 06:20 - 2009 May 07, 06:41 UT * 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: The occultation path -------------------- * approximate projected width [km]: 120 * 1 sigma uncertainty interval [path widths]: +/- 0.52 * 1 sigma uncertainty interval [seconds]: +/- 4.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .057 +/- .040) * 1 sigma uncertainty ellipse (major, minor, PA): ( .057", .040", 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 47 29 -61 27 57 6 20 58 6 97 -31 -157 37 16 -60 39 30 -147 44 26 -61 58 40 ... .. .. .. .. .. -144 16 9 -62 23 1 -139 52 17 -60 53 49 6 21 14 12 86 -36 -142 33 31 -60 36 38 -137 24 42 -61 8 35 -145 41 51 -60 15 9 -135 2 4 -61 21 57 -132 29 27 -59 43 27 6 21 30 16 80 -40 -134 32 3 -59 32 38 -130 33 1 -59 53 7 -136 47 31 -59 19 56 -128 37 23 -60 2 8 -127 4 8 -58 21 41 6 21 46 19 75 -43 -128 47 0 -58 14 0 -125 25 1 -58 28 38 -130 38 31 -58 5 8 -123 45 24 -58 35 12 -122 50 6 -56 55 10 6 22 2 22 72 -45 -124 20 18 -56 49 24 -121 22 29 -57 0 26 -125 57 12 -56 42 47 -119 53 51 -57 5 24 -119 24 46 -55 26 45 6 22 18 24 70 -48 -120 45 57 -55 22 16 -118 5 33 -55 30 50 -122 12 40 -55 17 9 -116 45 3 -55 34 42 -116 34 58 -53 57 49 6 22 34 26 68 -50 -117 49 18 -53 54 16 -115 22 11 -54 1 3 -119 8 23 -53 50 13 -114 8 1 -54 4 5 -114 12 7 -52 29 8 6 22 50 28 66 -52 -115 21 2 -52 26 17 -113 4 29 -52 31 43 -116 34 9 -52 23 1 -111 55 24 -52 34 8 -112 10 23 -51 1 5 6 23 6 30 65 -54 -113 14 53 -50 58 46 -111 6 58 -51 3 9 -114 23 10 -50 56 7 -110 2 5 -51 5 5 -110 25 33 -49 33 54 6 23 22 32 64 -55 -111 26 22 -49 32 1 -109 25 40 -49 35 34 -112 30 40 -49 29 51 -108 24 19 -49 37 7 -108 54 31 -48 7 41 6 23 38 33 63 -57 -109 52 13 -48 6 10 -107 57 38 -48 9 2 -110 53 9 -48 4 22 -106 59 17 -48 10 16 -107 34 55 -46 42 30 6 23 54 35 63 -59 -108 29 56 -46 41 16 -106 40 36 -46 43 35 -109 27 59 -46 39 47 -105 44 52 -46 44 33 -106 24 54 -45 18 21 6 24 9 36 62 -60 -107 17 37 -45 17 21 -105 32 51 -45 19 13 -108 13 10 -45 16 9 -104 39 22 -45 19 58 -105 23 3 -43 55 14 6 24 25 37 62 -62 -106 13 44 -43 54 25 -104 32 59 -43 55 54 -107 7 6 -43 53 26 -103 41 30 -43 56 28 -104 28 13 -42 33 5 6 24 41 39 62 -64 -105 17 6 -42 32 27 -103 39 53 -42 33 36 -106 8 32 -42 31 39 -102 50 10 -42 34 0 -103 39 26 -41 11 54 6 24 57 40 62 -65 -104 26 44 -41 11 24 -102 52 40 -41 12 16 -105 16 27 -41 10 45 -102 4 31 -41 12 32 -102 55 58 -39 51 36 6 25 13 41 63 -66 -103 41 49 -39 51 14 -102 10 35 -39 51 52 -104 30 2 -39 50 44 -101 23 51 -39 52 1 -102 17 10 -38 32 10 6 25 29 42 63 -68 -103 1 44 -38 31 55 -101 33 2 -38 32 20 -103 48 34 -38 31 32 -100 47 35 -38 32 23 -101 42 30 -37 13 33 6 25 45 43 64 -69 -102 25 55 -37 13 23 -100 59 30 -37 13 37 -103 11 31 -37 13 6 -100 15 12 -37 13 36 -101 11 32 -35 55 42 6 26 1 44 64 -71 -101 53 53 -35 55 36 -100 29 33 -35 55 41 -102 38 22 -35 55 25 - 99 46 18 -35 55 35 -100 43 52 -34 38 33 6 26 17 45 65 -72 -101 25 16 -34 38 32 -100 2 50 -34 38 29 -102 8 44 -34 38 25 - 99 20 32 -34 38 19 -100 19 12 -33 22 5 6 26 33 46 66 -73 -100 59 44 -33 22 7 - 99 39 1 -33 21 57 -101 42 17 -33 22 5 - 98 57 35 -33 21 43 - 99 57 16 -32 6 14 6 26 49 47 66 -75 -100 37 0 -32 6 20 - 99 17 51 -32 6 3 -101 18 42 -32 6 21 - 98 37 13 -32 5 46 - 99 37 48 -30 50 58 6 27 5 48 67 -76 -100 16 49 -30 51 7 - 98 59 6 -30 50 44 -100 57 44 -30 51 11 - 98 19 12 -30 50 25 - 99 20 37 -29 36 14 6 27 21 48 68 -77 - 99 58 57 -29 36 26 - 98 42 35 -29 35 58 -100 39 10 -29 36 33 - 98 3 20 -29 35 36 - 99 5 32 -28 22 1 6 27 37 49 69 -78 - 99 43 15 -28 22 14 - 98 28 5 -28 21 42 -100 22 49 -28 22 24 - 97 49 28 -28 21 19 - 98 52 23 -27 8 15 6 27 53 50 70 -80 - 99 29 33 -27 8 31 - 98 15 30 -27 7 55 -100 8 31 -27 8 42 - 97 37 26 -27 7 29 - 98 41 3 -25 54 54 6 28 9 50 72 -81 - 99 17 42 -25 55 12 - 98 4 40 -25 54 33 - 99 56 7 -25 55 26 - 97 27 8 -25 54 6 - 98 31 24 -24 41 57 6 28 25 51 73 -82 - 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96 57 20 -15 7 14 - 98 7 23 -13 57 20 6 30 48 54 86 -87 - 98 40 47 -13 57 45 - 97 34 13 -13 56 51 - 99 15 46 -13 58 8 - 96 59 57 -13 56 17 - 98 10 42 -12 46 27 6 31 4 54 88 -86 - 98 43 56 -12 46 53 - 97 37 42 -12 45 58 - 99 18 44 -12 47 16 - 97 3 37 -12 45 25 - 98 15 7 -11 35 38 6 31 20 54 89 -85 - 98 48 11 -11 36 3 - 97 42 16 -11 35 9 - 99 22 50 -11 36 26 - 97 8 20 -11 34 35 - 98 20 35 -10 24 48 6 31 36 54 91 -83 - 98 53 32 -10 25 14 - 97 47 52 -10 24 19 - 99 28 2 -10 25 36 - 97 14 4 -10 23 46 - 98 27 7 - 9 13 58 6 31 52 54 92 -82 - 98 59 57 - 9 14 23 - 97 54 30 - 9 13 29 - 99 34 21 - 9 14 45 - 97 20 48 - 9 12 56 - 98 34 41 - 8 3 5 6 32 8 54 94 -81 - 99 7 27 - 8 3 29 - 98 2 10 - 8 2 36 - 99 41 46 - 8 3 51 - 97 28 34 - 8 2 3 - 98 43 19 - 6 52 6 6 32 24 54 96 -80 - 99 16 1 - 6 52 31 - 98 10 51 - 6 51 39 - 99 50 16 - 6 52 52 - 97 37 19 - 6 51 6 - 98 53 1 - 5 41 2 6 32 40 53 97 -79 - 99 25 40 - 5 41 25 - 98 20 35 - 5 40 35 - 99 59 52 - 5 41 46 - 97 47 6 - 5 40 3 - 99 3 46 - 4 29 49 6 32 56 53 99 -78 - 99 36 24 - 4 30 12 - 98 31 22 - 4 29 22 -100 10 35 - 4 30 32 - 97 57 53 - 4 28 51 - 99 15 36 - 3 18 25 6 33 12 53 100 -76 - 99 48 14 - 3 18 47 - 98 43 11 - 3 17 59 -100 22 26 - 3 19 6 - 98 9 43 - 3 17 29 - 99 28 32 - 2 6 49 6 33 28 52 102 -75 -100 1 12 - 2 7 10 - 98 56 6 - 2 6 24 -100 35 26 - 2 7 28 - 98 22 36 - 2 5 54 - 99 42 36 - 0 54 58 6 33 44 52 103 -74 -100 15 19 - 0 55 18 - 99 10 7 - 0 54 34 -100 49 36 - 0 55 35 - 98 36 35 - 0 54 6 - 99 57 49 0 17 9 6 34 0 52 105 -73 -100 30 36 0 16 50 - 99 25 16 0 17 32 -101 4 58 0 16 34 - 98 51 39 0 17 59 -100 14 13 1 29 35 6 34 16 51 106 -72 -100 47 6 1 29 17 - 99 41 35 1 29 56 -101 21 35 1 29 3 - 99 7 52 1 30 23 -100 31 52 2 42 22 6 34 32 50 107 -70 -101 4 53 2 42 6 - 99 59 6 2 42 42 -101 39 29 2 41 53 - 99 25 17 2 43 7 -100 50 48 3 55 33 6 34 48 50 109 -69 -101 23 58 3 55 18 -100 17 54 3 55 51 -101 58 44 3 55 7 - 99 43 56 3 56 14 -101 11 6 5 9 10 6 35 4 49 110 -68 -101 44 26 5 8 57 -100 38 0 5 9 26 -102 19 24 5 8 48 -100 3 52 5 9 48 -101 32 48 6 23 15 6 35 20 48 111 -67 -102 6 21 6 23 5 -100 59 31 6 23 30 -102 41 33 6 22 58 -100 25 10 6 23 49 -101 56 0 7 37 53 6 35 36 48 112 -65 -102 29 48 7 37 45 -101 22 29 7 38 5 -103 5 15 7 37 40 -100 47 53 7 38 23 -102 20 48 8 53 5 6 35 52 47 113 -64 -102 54 53 8 52 59 -101 47 0 8 53 15 -103 30 38 8 52 58 -101 12 9 8 53 30 -102 47 17 10 8 56 6 36 7 46 114 -63 -103 21 41 10 8 53 -102 13 11 10 9 3 -103 57 48 10 8 54 -101 38 1 10 9 15 -103 15 36 11 25 28 6 36 23 45 115 -62 -103 50 22 11 25 28 -102 41 9 11 25 32 -104 26 51 11 25 33 -102 5 38 11 25 42 -103 45 53 12 42 46 6 36 39 44 116 -60 -104 21 3 12 42 50 -103 11 2 12 42 47 -104 57 59 12 42 58 -102 35 6 12 42 53 -104 18 17 14 0 54 6 36 55 43 117 -59 -104 53 55 14 1 1 -103 42 59 14 0 51 -105 31 21 14 1 14 -103 6 37 14 0 53 -104 52 59 15 19 56 6 37 11 42 118 -58 -105 29 9 15 20 8 -104 17 11 15 19 50 -106 7 9 15 20 26 -103 40 19 15 19 48 -105 30 14 16 39 59 6 37 27 41 118 -56 -106 6 59 16 40 16 -104 53 52 16 39 47 -106 45 38 16 40 39 -104 16 25 16 39 41 -106 10 17 18 1 7 6 37 43 40 119 -55 -106 47 43 18 1 30 -105 33 16 18 0 50 -107 27 5 18 1 59 -104 55 11 18 0 38 -106 53 27 19 23 28 6 37 59 39 119 -53 -107 31 38 19 23 57 -106 15 42 19 23 5 -108 11 50 19 24 33 -105 36 53 19 22 47 -107 40 6 20 47 8 6 38 15 38 120 -52 -108 19 9 20 47 44 -107 1 31 20 46 38 -109 0 17 20 48 29 -106 21 52 20 46 13 -108 30 41 22 12 16 6 38 31 36 120 -50 -109 10 44 22 13 1 -107 51 9 22 11 38 -109 52 57 22 13 55 -107 10 32 22 11 5 -109 25 45 23 39 3 6 38 47 35 120 -49 -110 6 57 23 39 58 -108 45 6 23 38 15 -110 50 26 23 41 3 -108 3 24 23 37 34 -110 25 59 25 7 39 6 39 3 33 121 -47 -111 8 32 25 8 46 -109 44 3 25 6 41 -111 53 30 25 10 4 -109 1 5 25 5 48 -111 32 14 26 38 20 6 39 19 32 121 -45 -112 16 23 26 39 40 -110 48 48 26 37 8 -113 3 6 26 41 14 -110 4 21 26 36 3 -112 45 38 28 11 21 6 39 35 30 121 -44 -113 31 41 28 12 58 -112 0 24 28 9 53 -114 20 31 28 14 51 -111 14 10 28 8 32 -114 7 37 29 47 4 6 39 51 28 120 -42 -114 56 1 29 49 3 -113 20 12 29 45 17 -115 47 26 29 51 19 -112 31 50 29 43 37 -115 40 12 31 25 57 6 40 7 26 120 -40 -116 31 30 31 28 22 -114 50 4 31 23 45 -117 26 12 31 31 8 -113 59 3 31 21 42 -117 26 10 33 8 36 6 40 23 24 120 -38 -118 21 15 33 11 36 -116 32 33 33 5 52 -119 20 15 33 15 3 -115 38 11 33 3 18 -119 29 45 34 55 53 6 40 39 22 119 -35 -120 29 57 34 59 42 -118 31 28 34 52 26 -121 34 52 35 4 4 -117 32 42 34 49 11 -121 57 42 36 49 7 6 40 55 19 118 -33 -123 5 21 36 54 6 -120 52 48 36 44 37 -124 19 5 36 59 53 -119 47 52 36 40 24 -125 2 16 38 50 32 6 41 11 16 116 -30 -126 22 3 38 57 28 -123 46 58 38 44 23 -127 50 51 39 5 39 -122 32 40 38 38 40 -129 10 28 41 4 49 6 41 27 13 114 -27 -130 55 10 41 15 45 -127 35 32 40 55 31 -132 58 42 41 29 32 -126 4 36 40 47 9 -135 59 37 43 48 2 6 41 43 7 109 -22 -139 43 13 44 17 59 -133 22 28 43 28 45 ... .. .. .. .. .. -131 9 8 43 13 33 Uncertainty in time = +/- 6 secs [Prediction of 2008 Mar 20.0] 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 * 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: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 689 number of rejected observations: 112 time covered by the observations: 1903 Sep 21 - 2008 Feb 14 1 sigma uncertainty ellipse (major, minor, PA): 0.048, 0.021, 83° remarks: * orbital elements for (393) Lampetia : Mean anomaly = 330.28829733 deg Arg. of pericenter = 91.16435767 deg Long. of node = 212.48286483 deg Inclination = 14.87440602 deg Eccentricity = 0.33207555 Semimajor axis = 2.77743118 AU Perihelion dist = 1.85511419 AU Mag: H = 8.39, 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 -61.9367 -8.842 81.31 16.87 6.5223 -0.58209 -0.07613 -0.60022 4.58022 -0.00299 -0.00088 2000 328.5269312009 429.00000 91.164358212.482865 14.8744060.33207555 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 0.057 0.040 85 1.52 0.058 0 54545.5020090507_0102-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 07:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org