IOTA/IOTA-ES occultation update for (694) Ekard / TYC 1091-01624-2 event on 2009 Jul 05, 16:18 UT Visible from Summary ------- On 2009 Jul 05 UT, the 99 km diameter asteroid (694) Ekard will occult a 10.6 mag star in the constellation Delphinus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.4 mag to 11.6 mag (the magnitude of the asteroid) for at most 13.6 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: . The event at a glimpse ---------------------- * Rank: 84 * date and approx. time of event: 2009 Jul 05, 16:06 - 2009 Jul 05, 16:30 UT * magnitude of target star: 10.6 * magnitude drop [mag]: 1.4 * estimated maximum duration [s]: 13.6 * Moon: 97 % sunlit, 56° distance * Sun: 141° distance * rough path description: Additional comments ------------------- 4.9" double star The occultation path -------------------- * approximate projected width [km]: 117 * 1 sigma uncertainty interval [path widths]: +/- 0.62 * 1 sigma uncertainty interval [seconds]: +/- 7.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .083 +/- .073) * 1 sigma uncertainty ellipse (major, minor, PA): ( .083", .073", 84° ) * approx speed of asteroid's shadow [km/s]: 7.2944 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1091-01624-2 by 694 Ekard on 2009 Jul 5 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 120 55 9 -79 0 0 16 6 10 0 21 -34 123 49 34 117 56 17 127 20 46 ... .. .. 122 39 34 -78 0 0 16 6 10 1 19 -35 125 17 45 119 58 2 128 30 0 116 32 9 124 3 53 -77 0 0 16 6 11 2 18 -36 126 28 48 121 36 20 129 25 25 118 29 5 125 12 45 -76 0 0 16 6 12 4 16 -37 127 26 36 122 56 47 130 10 5 120 4 45 126 9 26 -75 0 0 16 6 13 5 15 -38 128 13 55 124 3 13 130 46 12 121 23 55 126 56 21 -74 0 0 16 6 15 6 15 -39 128 52 47 124 58 27 131 15 24 122 29 58 127 35 16 -73 0 0 16 6 16 7 14 -39 129 24 42 125 44 35 131 38 55 123 25 23 128 7 34 -72 0 0 16 6 19 8 14 -40 129 50 53 126 23 12 131 57 40 124 12 6 128 34 19 -71 0 0 16 6 21 9 13 -41 130 12 12 126 55 30 132 12 26 124 51 31 128 56 21 -70 0 0 16 6 24 10 13 -42 130 29 24 127 22 29 132 23 46 125 24 47 129 14 21 -69 0 0 16 6 27 11 13 -43 130 43 4 127 44 53 132 32 11 125 52 49 129 28 50 -68 0 0 16 6 31 12 12 -44 130 53 40 128 3 21 132 38 1 126 16 20 129 40 17 -67 0 0 16 6 35 13 12 -45 131 1 34 128 18 23 132 41 38 126 35 55 129 49 3 -66 0 0 16 6 39 14 12 -46 131 7 8 128 30 25 132 43 16 126 52 5 129 55 26 -65 0 0 16 6 43 15 12 -47 131 10 35 128 39 47 132 43 8 127 5 12 129 59 42 -64 0 0 16 6 48 16 12 -48 131 12 10 128 46 46 132 41 26 127 15 38 130 2 4 -63 0 0 16 6 53 17 12 -49 131 12 4 128 51 39 132 38 19 127 23 40 130 2 44 -62 0 0 16 6 58 18 12 -50 131 10 27 128 54 37 132 33 55 127 29 32 130 1 51 -61 0 0 16 7 3 19 12 -51 131 7 28 128 55 51 132 28 21 127 33 27 129 59 32 -60 0 0 16 7 9 20 12 -52 131 3 13 128 55 31 132 21 42 127 35 36 129 55 56 -59 0 0 16 7 15 20 12 -53 130 57 48 128 53 45 132 14 4 127 36 7 129 51 9 -58 0 0 16 7 22 21 12 -54 130 51 19 128 50 39 132 5 32 127 35 10 129 45 15 -57 0 0 16 7 29 22 13 -55 130 43 51 128 46 21 131 56 8 127 32 51 129 38 20 -56 0 0 16 7 35 23 13 -56 130 35 28 128 40 54 131 45 57 127 29 15 129 30 27 -55 0 0 16 7 43 24 13 -57 130 26 13 128 34 24 131 35 1 127 24 30 129 21 40 -54 0 0 16 7 50 25 13 -58 130 16 10 128 26 55 131 23 22 127 18 38 129 12 4 -53 0 0 16 7 58 26 13 -59 130 5 20 128 18 31 131 11 4 127 11 45 129 1 39 -52 0 0 16 8 6 27 14 -60 129 53 48 128 9 15 130 58 9 127 3 54 128 50 29 -51 0 0 16 8 15 28 14 -61 129 41 34 127 59 9 130 44 37 126 55 9 128 38 36 -50 0 0 16 8 23 29 14 -62 129 28 42 127 48 17 130 30 30 126 45 32 128 26 2 -49 0 0 16 8 32 30 15 -63 129 15 11 127 36 40 130 15 50 126 35 6 128 12 49 -48 0 0 16 8 41 31 15 -64 129 1 5 127 24 20 130 0 39 126 23 53 127 58 58 -47 0 0 16 8 51 32 15 -65 128 46 24 127 11 19 129 44 56 126 11 56 127 44 31 -46 0 0 16 9 0 33 16 -66 128 31 10 126 57 40 129 28 43 125 59 15 127 29 28 -45 0 0 16 9 10 34 16 -67 128 15 23 126 43 22 129 12 1 125 45 54 127 13 52 -44 0 0 16 9 21 35 17 -68 127 59 4 126 28 28 128 54 51 125 31 52 126 57 42 -43 0 0 16 9 31 36 17 -69 127 42 15 126 12 58 128 37 13 125 17 12 126 41 0 -42 0 0 16 9 42 37 18 -70 127 24 55 125 56 53 128 19 7 125 1 54 126 23 46 -41 0 0 16 9 53 37 18 -71 127 7 6 125 40 15 128 0 34 124 46 0 126 6 1 -40 0 0 16 10 4 38 19 -72 126 48 48 125 23 4 127 41 35 124 29 30 125 47 46 -39 0 0 16 10 15 39 19 -73 126 30 1 125 5 20 127 22 9 124 12 26 125 29 0 -38 0 0 16 10 27 40 20 -74 126 10 46 124 47 4 127 2 17 123 54 47 125 9 45 -37 0 0 16 10 39 41 20 -75 125 51 2 124 28 17 126 42 0 123 36 35 124 50 0 -36 0 0 16 10 51 42 21 -76 125 30 51 124 8 58 126 21 16 123 17 49 124 29 46 -35 0 0 16 11 3 43 22 -77 125 10 13 123 49 9 126 0 7 122 58 31 124 9 3 -34 0 0 16 11 16 43 22 -78 124 49 6 123 28 49 125 38 32 122 38 40 123 47 51 -33 0 0 16 11 29 44 23 -79 124 27 32 123 7 59 125 16 31 122 18 17 123 26 10 -32 0 0 16 11 42 45 24 -80 124 5 31 122 46 38 124 54 4 121 57 21 123 4 0 -31 0 0 16 11 55 46 25 -81 123 43 2 122 24 47 124 31 11 121 35 54 122 41 20 -30 0 0 16 12 8 47 26 -81 123 20 4 122 2 25 124 7 52 121 13 54 122 18 12 -29 0 0 16 12 22 47 27 -82 122 56 39 121 39 33 123 44 7 120 51 22 121 54 33 -28 0 0 16 12 36 48 28 -83 122 32 46 121 16 10 123 19 54 120 28 18 121 30 26 -27 0 0 16 12 50 49 29 -84 122 8 24 120 52 16 122 55 15 120 4 42 121 5 48 -26 0 0 16 13 4 50 30 -85 121 43 33 120 27 51 122 30 8 119 40 33 120 40 39 -25 0 0 16 13 19 50 31 -86 121 18 13 120 2 55 122 4 33 119 15 51 120 15 0 -24 0 0 16 13 33 51 32 -87 120 52 23 119 37 26 121 38 30 118 50 35 119 48 50 -23 0 0 16 13 48 52 33 -87 120 26 3 119 11 25 121 11 58 118 24 46 119 22 8 -22 0 0 16 14 3 52 34 -87 119 59 13 118 44 52 120 44 57 117 58 23 118 54 53 -21 0 0 16 14 18 53 36 -87 119 31 51 118 17 45 120 17 25 117 31 24 118 27 6 -20 0 0 16 14 33 54 37 -87 119 3 57 117 50 3 119 49 23 117 3 51 117 58 45 -19 0 0 16 14 49 54 38 -86 118 35 30 117 21 47 119 20 50 116 35 41 117 29 49 -18 0 0 16 15 5 55 40 -85 118 6 30 116 52 56 118 51 45 116 6 54 117 0 18 -17 0 0 16 15 20 55 41 -84 117 36 56 116 23 28 118 22 6 115 37 30 116 30 11 -16 0 0 16 15 36 56 43 -83 117 6 47 115 53 23 117 51 54 115 7 27 115 59 27 -15 0 0 16 15 52 56 44 -82 116 36 2 115 22 40 117 21 7 114 36 45 115 28 4 -14 0 0 16 16 9 56 46 -81 116 4 39 114 51 17 116 49 44 114 5 22 114 56 3 -13 0 0 16 16 25 57 48 -80 115 32 38 114 19 14 116 17 44 113 33 17 114 23 21 -12 0 0 16 16 42 57 49 -79 114 59 58 113 46 30 115 45 6 113 0 29 113 49 57 -11 0 0 16 16 58 57 51 -78 114 26 38 113 13 2 115 11 49 112 26 57 113 15 49 -10 0 0 16 17 15 58 53 -77 113 52 35 112 38 50 114 37 51 111 52 39 112 40 57 - 9 0 0 16 17 32 58 55 -76 113 17 48 112 3 53 114 3 11 111 17 33 112 5 19 - 8 0 0 16 17 49 58 57 -75 112 42 17 111 28 7 113 27 47 110 41 39 111 28 53 - 7 0 0 16 18 6 58 58 -73 112 5 58 110 51 32 112 51 38 110 4 53 110 51 37 - 6 0 0 16 18 24 58 60 -72 111 28 51 110 14 6 112 14 42 109 27 14 110 13 28 - 5 0 0 16 18 41 58 62 -71 110 50 54 109 35 47 111 36 57 108 48 41 109 34 26 - 4 0 0 16 18 58 58 64 -70 110 12 3 108 56 32 110 58 20 108 9 9 108 54 27 - 3 0 0 16 19 16 58 66 -69 109 32 18 108 16 19 110 18 51 107 28 38 108 13 29 - 2 0 0 16 19 34 58 68 -68 108 51 35 107 35 6 109 38 26 106 47 4 107 31 29 - 1 0 0 16 19 52 57 70 -67 108 9 51 106 52 48 108 57 2 106 4 25 106 48 24 0 0 0 16 20 10 57 71 -66 107 27 5 106 9 25 108 14 37 105 20 36 106 4 11 1 0 0 16 20 28 57 73 -64 106 43 12 105 24 51 107 31 9 104 35 35 Latitude Latitude Latitude Latitude 105 0 0 2 24 21 16 20 53 56 76 -63 3 15 10 1 32 46 4 17 13 0 27 40 104 0 0 3 40 20 16 21 16 56 78 -61 4 30 5 2 49 53 5 30 50 1 46 17 103 0 0 4 53 40 16 21 39 55 79 -60 5 42 23 4 4 17 6 41 57 3 2 4 102 0 0 6 4 26 16 22 0 54 81 -58 6 52 12 5 16 3 7 50 37 4 15 9 101 0 0 7 12 44 16 22 21 54 83 -57 7 59 35 6 25 18 8 56 55 5 25 37 100 0 0 8 18 38 16 22 42 53 84 -55 9 4 37 7 32 5 10 0 56 6 33 34 99 0 0 9 22 13 16 23 2 52 86 -54 10 7 24 8 36 31 11 2 44 7 39 5 98 0 0 10 23 34 16 23 21 51 87 -53 11 7 58 9 38 40 12 2 24 8 42 16 97 0 0 11 22 45 16 23 39 50 88 -52 12 6 25 10 38 36 12 59 58 9 43 11 96 0 0 12 19 50 16 23 57 49 89 -50 13 2 49 11 36 24 13 55 32 10 41 54 95 0 0 13 14 53 16 24 15 49 90 -49 13 57 12 12 32 8 14 49 7 11 38 30 94 0 0 14 7 57 16 24 32 48 91 -48 14 49 39 13 25 51 15 40 49 12 33 4 93 0 0 14 59 7 16 24 48 47 91 -47 15 40 13 14 17 38 16 30 40 13 25 38 92 0 0 15 48 26 16 25 4 46 92 -45 16 28 58 15 7 32 17 18 44 14 16 18 91 0 0 16 35 57 16 25 19 45 92 -44 17 15 56 15 55 37 18 5 3 15 5 5 90 0 0 17 21 43 16 25 34 44 93 -43 18 1 11 16 41 55 18 49 41 15 52 4 89 0 0 18 5 48 16 25 48 43 93 -42 18 44 46 17 26 30 19 32 39 16 37 17 88 0 0 18 48 13 16 26 2 42 93 -41 19 26 43 18 9 24 20 14 2 17 20 48 87 0 0 19 29 2 16 26 15 41 94 -40 20 7 5 18 50 41 20 53 52 18 2 40 86 0 0 20 8 18 16 26 28 40 94 -39 20 45 55 19 30 23 21 32 11 18 42 56 85 0 0 20 46 2 16 26 41 39 94 -38 21 23 15 20 8 32 22 9 1 19 21 37 84 0 0 21 22 18 16 26 53 38 94 -37 21 59 7 20 45 12 22 44 25 19 58 48 83 0 0 21 57 7 16 27 5 37 94 -36 22 33 35 21 20 24 23 18 25 20 34 29 82 0 0 22 30 33 16 27 16 36 94 -35 23 6 39 21 54 11 23 51 3 21 8 44 81 0 0 23 2 36 16 27 27 36 94 -34 23 38 21 22 26 35 24 22 22 21 41 34 80 0 0 23 33 19 16 27 37 35 94 -33 24 8 45 22 57 38 24 52 22 22 13 2 79 0 0 24 2 44 16 27 47 34 94 -32 24 37 52 23 27 22 25 21 6 22 43 9 78 0 0 24 30 52 16 27 57 33 94 -31 25 5 43 23 55 48 25 48 36 23 11 58 77 0 0 24 57 46 16 28 7 32 94 -30 25 32 20 24 22 59 26 14 52 23 39 30 76 0 0 25 23 27 16 28 16 31 93 -29 25 57 44 24 48 55 26 39 58 24 5 47 75 0 0 25 47 56 16 28 24 30 93 -29 26 21 59 25 13 40 27 3 54 24 30 51 74 0 0 26 11 15 16 28 33 29 93 -28 26 45 3 25 37 13 27 26 42 24 54 43 73 0 0 26 33 25 16 28 41 28 93 -27 27 7 0 25 59 37 27 48 22 25 17 24 72 0 0 26 54 28 16 28 49 28 92 -26 27 27 51 26 20 53 28 8 57 25 38 57 71 0 0 27 14 25 16 28 56 27 92 -25 27 47 36 26 41 2 28 28 28 25 59 21 70 0 0 27 33 17 16 29 4 26 92 -24 28 6 16 27 0 6 28 46 55 26 18 39 69 0 0 27 51 5 16 29 11 25 92 -24 28 23 54 27 18 4 29 4 19 26 36 51 68 0 0 28 7 50 16 29 17 24 91 -23 28 40 29 27 35 0 29 20 42 26 53 59 67 0 0 28 23 34 16 29 24 23 91 -22 28 56 3 27 50 52 29 36 5 27 10 3 66 0 0 28 38 16 16 29 30 22 91 -21 29 10 37 28 5 43 29 50 28 27 25 5 65 0 0 28 51 58 16 29 36 21 90 -20 29 24 11 28 19 33 30 3 53 27 39 5 64 0 0 29 4 40 16 29 42 21 90 -20 29 36 46 28 32 23 30 16 19 27 52 4 63 0 0 29 16 24 16 29 47 20 89 -19 29 48 23 28 44 13 30 27 48 28 4 3 62 0 0 29 27 10 16 29 52 19 89 -18 29 59 3 28 55 5 30 38 20 28 15 3 61 0 0 29 36 58 16 29 57 18 89 -17 30 8 45 29 4 59 30 47 56 28 25 3 60 0 0 29 45 48 16 30 2 17 88 -17 30 17 31 29 13 54 30 56 37 28 34 5 59 0 0 29 53 42 16 30 6 16 88 -16 30 25 21 29 21 53 31 4 21 28 42 8 58 0 0 30 0 40 16 30 11 16 87 -15 30 32 16 29 28 54 31 11 11 28 49 14 57 0 0 30 6 42 16 30 15 15 87 -14 30 38 14 29 34 59 31 17 6 28 55 23 56 0 0 30 11 48 16 30 19 14 86 -14 30 43 18 29 40 7 31 22 7 29 0 34 55 0 0 30 15 59 16 30 22 13 86 -13 30 47 27 29 44 20 31 26 14 29 4 49 54 0 0 30 19 14 16 30 25 12 85 -12 30 50 41 29 47 36 31 29 26 29 8 7 53 0 0 30 21 33 16 30 29 11 85 -11 30 53 0 29 49 56 31 31 44 29 10 28 52 0 0 30 22 58 16 30 31 10 84 -11 30 54 24 29 51 20 31 33 9 29 11 52 51 0 0 30 23 27 16 30 34 10 84 -10 30 54 54 29 51 49 31 33 39 29 12 19 50 0 0 30 23 0 16 30 37 9 83 -9 30 54 28 29 51 21 31 33 15 29 11 50 49 0 0 30 21 38 16 30 39 8 83 -9 30 53 8 29 49 56 31 31 57 29 10 23 48 0 0 30 19 19 16 30 41 7 83 -8 30 50 52 29 47 35 31 29 44 29 7 59 47 0 0 30 16 4 16 30 43 6 82 -7 30 47 40 29 44 18 31 26 36 29 4 37 46 0 0 30 11 53 16 30 44 5 82 -6 30 43 33 29 40 2 31 22 33 29 0 17 45 0 0 30 6 45 16 30 45 4 81 -6 30 38 28 29 34 49 31 17 34 28 54 58 44 0 0 30 0 38 16 30 47 4 81 -5 30 32 27 29 28 38 31 11 39 28 48 40 43 0 0 29 53 34 16 30 47 3 80 -4 30 25 29 29 21 27 31 4 47 28 41 22 42 0 0 29 45 30 16 30 48 2 80 -4 30 17 31 29 13 17 30 56 58 28 33 4 41 0 0 29 36 27 16 30 48 1 79 -3 30 8 35 29 4 7 .. .. .. 28 23 44 40 0 0 29 26 23 16 30 49 0 79 -2 29 58 40 .. .. .. .. .. .. .. .. .. Uncertainty in time = +/- 9 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 1091-01624-2 * constellation : Delphinus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 27 55.7643 DE: +09 57 40.195 * position source: mpos:TYC pm:TYC * standard error: RA,DE ["]: ( .068, .070 ) * V mag [mag]: 10.6 * B mag [mag]: 11.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (694) Ekard approx. diameter [km]: 99 approx. diameter ["]: .132 distance from Earth [AU]: 1.03200 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 807 number of rejected observations: 78 time covered by the observations: 1909 Nov 09 - 2008 Jan 15 1 sigma uncertainty ellipse (major, minor, PA): 0.049, 0.020, 73° remarks: * orbital elements for (694) Ekard : Mean anomaly = 338.12967492 deg Arg. of pericenter = 110.87669290 deg Long. of node = 230.40300179 deg Inclination = 15.84239258 deg Eccentricity = 0.32562981 Semimajor axis = 2.66917409 AU Perihelion dist = 1.80001145 AU Mag: H = 9.15, G = 0.15 Epoch of elements : MJD 55017.67900000 TDT (2009 Jul 05.679) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jul 5 694 Ekard 16h 18.5m UT 10.6 20 27 55.764 9 57 40.19TYC 1091-01624-2 11.0 11.6 99 13.6 1.032 -1.124 30.91 138.5699 9.952 -63.45 22.73 16.3078 -0.46710 -0.25027 -1.94580 3.62832 -0.00171 -0.00261 2000 336.3941002009 628.00000110.876693230.403002 15.8423930.32562981 2.6691741 1.8000114 9.2 5.00.15 RATE 2.2601580 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.083 0.073 84 1.62 0.082 0 54545.5020090705_1624-2 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 10:19 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org