IOTA/IOTA-ES occultation update for (182) Elsa / TYC 1386-00300-1 event on 2012 Dec 06, 17:28 UT Visible from E Australia, SE Asia, India Summary ------- On 2012 Dec 06 UT, the 45 km diameter asteroid (182) Elsa will occult a 10.7 mag star in the constellation Cancer for observers along a path across E Australia, SE Asia, India. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.7 mag to 12.2 mag (the magnitude of the asteroid) for at most 43.9 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: 68 * date and approx. time of event: 2012 Dec 06, 16:02 - 2012 Dec 06, 18:54 UT * geocentric midpoint of event [JD]: 2456268.22652917 * magnitude of target star: 10.7 * magnitude drop [mag]: 1.7 * estimated maximum duration [s]: 43.9 * Moon: 49 % sunlit, 44° distance * Sun: 132° distance * rough path description: E Australia, SE Asia, India The occultation path -------------------- * approximate projected width [km]: 52 * 1 sigma uncertainty interval [path widths]: +/- 0.86 * 1 sigma uncertainty interval [seconds]: +/- 41.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .033 +/- .055) * 1 sigma uncertainty ellipse (major, minor, PA): ( .055", .033", 1° ) * approx speed of asteroid's shadow [km/s]: 1.0304 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1386-00300-1 by 182 Elsa on 2012 Dec 6 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 172 17 23 -53 0 0 16 2 10 18 356 -1 172 45 17 171 49 27 173 33 11 171 1 17 171 42 10 -52 0 0 16 2 50 19 357 -2 172 9 36 171 14 43 172 56 40 170 27 22 171 6 29 -51 0 0 16 3 33 20 357 -3 171 33 28 170 39 28 172 19 46 169 52 54 170 30 19 -50 0 0 16 4 18 21 357 -3 170 56 52 170 3 43 171 42 27 169 17 53 169 53 38 -49 0 0 16 5 5 22 358 -4 170 19 48 169 27 26 171 4 42 168 42 16 169 16 26 -48 0 0 16 5 55 23 358 -5 169 42 13 168 50 36 170 26 29 168 6 5 168 38 41 -47 0 0 16 6 46 24 359 -6 169 4 8 168 13 12 169 47 48 167 29 17 168 0 23 -46 0 0 16 7 40 25 359 -7 168 25 30 167 35 14 169 8 37 166 51 52 167 21 31 -45 0 0 16 8 36 26 360 -8 167 46 19 166 56 40 168 28 54 166 13 49 166 42 3 -44 0 0 16 9 34 27 360 -9 167 6 34 166 17 29 167 48 40 165 35 8 166 1 59 -43 0 0 16 10 34 28 0 -10 166 26 14 165 37 41 167 7 52 164 55 48 165 21 18 -42 0 0 16 11 36 29 1 -11 165 45 19 164 57 16 166 26 30 164 15 49 164 40 0 -41 0 0 16 12 40 30 1 -11 165 3 46 164 16 12 165 44 33 163 35 10 163 58 4 -40 0 0 16 13 47 31 2 -12 164 21 37 163 34 29 165 2 1 162 53 50 163 15 29 -39 0 0 16 14 55 32 2 -13 163 38 49 162 52 7 164 18 52 162 11 49 162 32 15 -38 0 0 16 16 6 33 3 -14 162 55 23 162 9 4 163 35 6 161 29 6 161 48 20 -37 0 0 16 17 18 34 3 -15 162 11 18 161 25 21 162 50 42 160 45 41 161 3 45 -36 0 0 16 18 33 35 4 -16 161 26 32 160 40 55 162 5 39 160 1 34 160 18 29 -35 0 0 16 19 50 36 4 -17 160 41 6 159 55 48 161 19 56 159 16 43 159 32 30 -34 0 0 16 21 8 37 5 -18 159 54 59 159 9 58 160 33 34 158 31 8 158 45 49 -33 0 0 16 22 29 38 6 -19 159 8 10 158 23 26 159 46 31 157 44 49 157 58 25 -32 0 0 16 23 51 39 6 -20 158 20 38 157 36 9 158 58 47 156 57 45 157 10 17 -31 0 0 16 25 16 40 7 -21 157 32 24 156 48 8 158 10 20 156 9 55 156 21 25 -30 0 0 16 26 42 41 7 -22 156 43 25 155 59 22 157 21 11 155 21 20 155 31 47 -29 0 0 16 28 10 41 8 -23 155 53 42 155 9 50 156 31 18 154 31 58 154 41 24 -28 0 0 16 29 40 42 9 -24 155 3 14 154 19 32 155 40 41 153 41 49 153 50 15 -27 0 0 16 31 12 43 10 -25 154 12 0 153 28 27 154 49 20 152 50 51 152 58 19 -26 0 0 16 32 46 44 10 -26 153 20 0 152 36 35 153 57 12 151 59 6 152 5 35 -25 0 0 16 34 22 45 11 -27 152 27 13 151 43 54 153 4 19 151 6 31 151 12 2 -24 0 0 16 35 59 46 12 -28 151 33 37 150 50 24 152 10 39 150 13 6 150 17 40 -23 0 0 16 37 39 47 13 -29 150 39 13 149 56 5 151 16 10 149 18 51 149 22 28 -22 0 0 16 39 19 48 14 -30 149 43 59 149 0 55 150 20 53 148 23 43 148 26 26 -21 0 0 16 41 2 49 15 -31 148 47 55 148 4 53 149 24 47 147 27 44 147 29 31 -20 0 0 16 42 47 49 16 -32 147 51 0 147 7 59 148 27 50 146 30 51 146 31 44 -19 0 0 16 44 33 50 17 -33 146 53 12 146 10 12 147 30 2 145 33 4 145 33 2 -18 0 0 16 46 21 51 18 -34 145 54 31 145 11 31 146 31 21 144 34 22 144 33 26 -17 0 0 16 48 10 52 19 -35 144 54 56 144 11 54 145 31 47 143 34 44 143 32 54 -16 0 0 16 50 1 53 20 -36 143 54 25 143 11 20 144 31 18 142 34 8 142 31 25 -15 0 0 16 51 54 53 22 -37 142 52 57 142 9 49 143 29 54 141 32 33 141 28 57 -14 0 0 16 53 48 54 23 -39 141 50 32 141 7 19 142 27 32 140 29 58 140 25 29 -13 0 0 16 55 44 55 24 -40 140 47 7 140 3 48 141 24 12 139 26 22 139 21 0 -12 0 0 16 57 42 55 26 -41 139 42 41 138 59 15 140 19 53 138 21 43 138 15 27 -11 0 0 16 59 41 56 27 -42 138 37 13 137 53 38 139 14 31 137 15 59 137 8 50 -10 0 0 17 1 41 57 29 -43 137 30 41 136 46 56 138 8 7 136 9 8 136 1 7 - 9 0 0 17 3 43 57 31 -44 136 23 3 135 39 7 137 0 38 135 1 9 134 52 15 - 8 0 0 17 5 47 58 32 -45 135 14 17 134 30 9 135 52 2 133 52 0 133 42 12 - 7 0 0 17 7 52 58 34 -46 134 4 20 133 19 59 134 42 17 132 41 38 132 30 56 - 6 0 0 17 9 58 59 36 -48 132 53 12 132 8 35 133 31 21 131 30 1 131 18 24 - 5 0 0 17 12 6 59 38 -49 131 40 48 130 55 55 132 19 12 130 17 6 130 4 34 - 4 0 0 17 14 16 59 40 -50 130 27 7 129 41 56 131 5 46 129 2 50 128 49 22 - 3 0 0 17 16 27 60 42 -51 129 12 6 128 26 34 129 51 1 127 47 11 127 32 46 - 2 0 0 17 18 39 60 44 -52 127 55 40 127 9 47 128 34 54 126 30 4 126 14 41 - 1 0 0 17 20 53 60 46 -53 126 37 47 125 51 30 127 17 21 125 11 27 124 55 5 0 0 0 17 23 8 60 49 -55 125 18 24 124 31 41 125 58 19 123 51 14 123 33 51 1 0 0 17 25 25 60 51 -56 123 57 24 123 10 13 124 37 43 122 29 21 Latitude Latitude Latitude Latitude 122 0 0 2 7 50 17 28 1 60 53 -57 2 24 52 1 50 45 2 54 1 1 21 13 121 0 0 2 50 21 17 29 40 60 55 -58 3 7 16 2 33 23 3 36 13 2 4 4 120 0 0 3 32 14 17 31 18 60 56 -59 3 49 2 3 15 23 4 17 48 2 46 16 119 0 0 4 13 29 17 32 55 60 58 -60 4 30 10 3 56 44 4 58 44 3 27 49 118 0 0 4 54 5 17 34 32 60 59 -61 5 10 40 4 37 27 5 39 3 4 8 44 117 0 0 5 34 3 17 36 7 60 61 -62 5 50 32 5 17 32 6 18 45 4 48 59 116 0 0 6 13 24 17 37 42 59 62 -63 6 29 46 5 56 59 6 57 49 5 28 37 115 0 0 6 52 7 17 39 16 59 63 -64 7 8 24 6 35 48 7 36 17 6 7 37 114 0 0 7 30 14 17 40 49 59 65 -64 7 46 24 7 14 0 8 14 8 6 45 59 113 0 0 8 7 43 17 42 21 58 66 -65 8 23 48 7 51 35 8 51 22 7 23 43 112 0 0 8 44 35 17 43 53 58 67 -66 9 0 35 8 28 33 9 28 0 8 0 51 111 0 0 9 20 51 17 45 23 58 68 -67 9 36 45 9 4 54 10 4 2 8 37 21 110 0 0 9 56 30 17 46 53 57 70 -68 10 12 20 9 40 38 10 39 27 9 13 14 109 0 0 10 31 33 17 48 21 57 71 -69 10 47 18 10 15 46 11 14 17 9 48 31 108 0 0 11 6 0 17 49 49 57 72 -70 11 21 40 10 50 17 11 48 31 10 23 11 107 0 0 11 39 50 17 51 16 56 73 -70 11 55 26 11 24 13 12 22 9 10 57 15 106 0 0 12 13 5 17 52 41 56 74 -71 12 28 36 11 57 32 12 55 11 11 30 42 105 0 0 12 45 44 17 54 6 55 74 -72 13 1 11 12 30 16 13 27 39 12 3 34 104 0 0 13 17 48 17 55 30 55 75 -73 13 33 10 13 2 24 13 59 30 12 35 49 103 0 0 13 49 16 17 56 53 54 76 -74 14 4 34 13 33 56 14 30 47 13 7 29 102 0 0 14 20 8 17 58 15 54 77 -74 14 35 22 14 4 53 15 1 29 13 38 33 101 0 0 14 50 26 17 59 36 53 77 -75 15 5 35 14 35 14 15 31 35 14 9 1 100 0 0 15 20 8 18 0 56 53 78 -76 15 35 14 15 5 0 16 1 7 14 38 54 99 0 0 15 49 15 18 2 15 52 79 -77 16 4 17 15 34 11 16 30 4 15 8 11 98 0 0 16 17 47 18 3 34 52 79 -78 16 32 45 16 2 46 16 58 26 15 36 53 97 0 0 16 45 43 18 4 51 51 80 -78 17 0 38 16 30 47 17 26 13 16 5 0 96 0 0 17 13 6 18 6 7 51 80 -79 17 27 57 16 58 12 17 53 25 16 32 31 95 0 0 17 39 53 18 7 22 50 81 -80 17 54 41 17 25 3 18 20 4 16 59 28 94 0 0 18 6 5 18 8 36 49 81 -81 18 20 50 17 51 19 18 46 7 17 25 50 93 0 0 18 31 43 18 9 50 49 82 -82 18 46 25 18 17 0 19 11 36 17 51 36 92 0 0 18 56 46 18 11 2 48 82 -82 19 11 25 18 42 6 19 36 31 18 16 48 91 0 0 19 21 15 18 12 13 48 82 -83 19 35 50 19 6 38 20 0 52 18 41 25 90 0 0 19 45 9 18 13 24 47 83 -84 19 59 42 19 30 35 20 24 38 19 5 27 89 0 0 20 8 29 18 14 33 46 83 -85 20 22 58 19 53 58 20 47 50 19 28 55 88 0 0 20 31 14 18 15 41 46 83 -85 20 45 41 20 16 46 21 10 28 19 51 48 87 0 0 20 53 25 18 16 49 45 83 -86 21 7 49 20 38 59 21 32 31 20 14 6 86 0 0 21 15 2 18 17 55 45 83 -87 21 29 23 21 0 39 21 54 1 20 35 50 85 0 0 21 36 4 18 19 1 44 84 -87 21 50 23 21 21 43 22 14 57 20 56 59 84 0 0 21 56 32 18 20 5 43 84 -88 22 10 49 21 42 14 22 35 18 21 17 34 83 0 0 22 16 26 18 21 9 43 84 -88 22 30 40 22 2 10 22 55 6 21 37 34 82 0 0 22 35 46 18 22 11 42 84 -88 22 49 58 22 21 32 23 14 19 21 57 0 81 0 0 22 54 31 18 23 13 41 84 -88 23 8 41 22 40 20 23 32 59 22 15 51 80 0 0 23 12 42 18 24 14 41 84 -88 23 26 50 22 58 33 23 51 5 22 34 8 79 0 0 23 30 19 18 25 13 40 84 -87 23 44 25 23 16 12 24 8 36 22 51 50 78 0 0 23 47 22 18 26 12 39 84 -86 24 1 26 23 33 16 24 25 34 23 8 58 77 0 0 24 3 50 18 27 10 39 84 -86 24 17 53 23 49 47 24 41 57 23 25 31 76 0 0 24 19 45 18 28 7 38 84 -85 24 33 45 24 5 42 24 57 47 23 41 30 75 0 0 24 35 5 18 29 3 37 84 -84 24 49 4 24 21 4 25 13 3 23 56 54 74 0 0 24 49 50 18 29 58 37 84 -84 25 3 48 24 35 51 25 27 44 24 11 44 73 0 0 25 4 1 18 30 52 36 84 -83 25 17 57 24 50 4 25 41 52 24 25 59 72 0 0 25 17 38 18 31 45 35 84 -82 25 31 33 25 3 42 25 55 25 24 39 39 71 0 0 25 30 40 18 32 37 35 83 -81 25 44 34 25 16 45 26 8 24 24 52 44 70 0 0 25 43 8 18 33 29 34 83 -81 25 57 0 25 29 14 26 20 48 25 5 15 69 0 0 25 55 1 18 34 19 33 83 -80 26 8 52 25 41 7 26 32 39 25 17 10 68 0 0 26 6 19 18 35 8 33 83 -79 26 20 9 25 52 26 26 43 54 25 28 31 67 0 0 26 17 2 18 35 57 32 83 -79 26 30 52 26 3 10 26 54 35 25 39 16 66 0 0 26 27 10 18 36 44 31 83 -78 26 40 59 26 13 19 27 4 42 25 49 26 65 0 0 26 36 43 18 37 31 31 82 -77 26 50 32 26 22 52 27 14 13 25 59 0 64 0 0 26 45 40 18 38 17 30 82 -76 26 59 29 26 31 50 27 23 10 26 7 58 63 0 0 26 54 2 18 39 1 29 82 -76 27 7 51 26 40 13 27 31 31 26 16 21 62 0 0 27 1 49 18 39 45 29 82 -75 27 15 37 26 47 59 27 39 17 26 24 7 61 0 0 27 8 59 18 40 28 28 81 -74 27 22 47 26 55 9 27 46 27 26 31 18 60 0 0 27 15 33 18 41 10 27 81 -73 27 29 21 27 1 43 27 53 1 26 37 51 59 0 0 27 21 30 18 41 51 26 81 -73 27 35 19 27 7 40 27 58 59 26 43 48 58 0 0 27 26 51 18 42 31 26 81 -72 27 40 40 27 13 0 28 4 21 26 49 7 57 0 0 27 31 35 18 43 10 25 80 -71 27 45 24 27 17 43 28 9 6 26 53 49 56 0 0 27 35 41 18 43 49 24 80 -70 27 49 31 27 21 49 28 13 14 26 57 54 55 0 0 27 39 9 18 44 26 24 80 -70 27 53 0 27 25 17 28 16 45 27 1 20 54 0 0 27 42 0 18 45 2 23 79 -69 27 55 52 27 28 6 28 19 38 27 4 7 53 0 0 27 44 12 18 45 38 22 79 -68 27 58 5 27 30 17 28 21 53 27 6 15 52 0 0 27 45 44 18 46 12 21 79 -67 27 59 39 27 31 48 28 23 30 27 7 44 51 0 0 27 46 38 18 46 45 21 78 -67 28 0 34 27 32 40 28 24 27 27 8 33 50 0 0 27 46 51 18 47 18 20 78 -66 28 0 49 27 32 51 28 24 45 27 8 41 49 0 0 27 46 24 18 47 49 19 78 -65 28 0 23 27 32 22 28 24 23 27 8 8 48 0 0 27 45 15 18 48 20 18 77 -64 27 59 17 27 31 11 28 23 21 27 6 54 47 0 0 27 43 25 18 48 49 18 77 -64 27 57 29 27 29 18 28 21 37 27 4 57 46 0 0 27 40 52 18 49 17 17 77 -63 27 54 59 27 26 42 28 19 11 27 2 16 45 0 0 27 37 35 18 49 44 16 76 -62 27 51 45 27 23 23 28 16 2 26 58 52 44 0 0 27 33 35 18 50 11 15 76 -61 27 47 48 27 19 20 28 12 10 26 54 43 43 0 0 27 28 50 18 50 36 14 76 -61 27 43 6 27 14 31 28 7 34 26 49 48 42 0 0 27 23 19 18 51 0 14 75 -60 27 37 39 27 8 56 28 2 12 26 44 7 41 0 0 27 17 0 18 51 22 13 75 -59 27 31 24 27 2 34 27 56 5 26 37 38 40 0 0 27 9 54 18 51 44 12 74 -58 27 24 23 26 55 24 27 49 10 26 30 20 39 0 0 27 1 59 18 52 4 11 74 -57 27 16 32 26 47 24 27 41 27 26 22 12 38 0 0 26 53 14 18 52 24 10 74 -56 27 7 51 26 38 33 27 32 55 26 13 13 37 0 0 26 43 36 18 52 41 10 73 -56 26 58 19 26 28 51 27 23 32 26 3 21 36 0 0 26 33 6 18 52 58 9 73 -55 26 47 55 26 18 15 27 13 17 25 52 34 35 0 0 26 21 41 18 53 13 8 72 -54 26 36 36 26 6 43 27 2 8 25 40 52 34 0 0 26 9 20 18 53 27 7 72 -53 26 24 21 25 54 16 26 50 4 25 28 13 33 0 0 25 56 0 18 53 39 6 72 -52 26 11 8 25 40 49 26 37 3 25 14 34 32 0 0 25 41 41 18 53 50 5 71 -51 25 56 56 25 26 22 26 23 4 24 59 53 31 0 0 25 26 19 18 53 59 4 71 -50 25 41 42 25 10 52 26 8 3 24 44 9 30 0 0 25 9 52 18 54 7 3 70 -50 25 25 25 24 54 17 25 52 0 24 27 19 29 0 0 24 52 19 18 54 13 2 70 -49 25 8 0 24 36 34 .. .. .. 24 9 19 28 0 0 24 33 36 18 54 17 2 69 -48 24 49 27 24 17 41 .. .. .. 23 50 9 27 0 0 24 13 40 18 54 19 1 69 -47 24 29 42 23 57 34 .. .. .. 23 29 43 Uncertainty in time = +/- 49 secs Prediction of 2012 Dec 3.0 Data for the target star ------------------------ * name: TYC 1386-00300-1 * constellation : Cancer * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 08 18 45.3199 DE: +19 18 07.274 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .022, .053 ) * V mag [mag]: 10.7 * B mag [mag]: 11.5 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (182) Elsa approx. diameter [km]: 45 approx. diameter ["]: .049 distance from Earth [AU]: 1.26100 * orbital information: orbit source: Preston date of fit: 2012 Nov 29 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 997 number of rejected observations: 130 time covered by the observations: 1908 Feb 11 - 2012 Nov 29 1 sigma uncertainty ellipse (major, minor, PA): 0.025, 0.014, 101° remarks: * orbital elements for (182) Elsa : Mean anomaly = 30.76062468 deg Arg. of pericenter = 310.27328394 deg Long. of node = 107.23972594 deg Inclination = 2.00446501 deg Eccentricity = 0.18631335 Semimajor axis = 2.41633639 AU Perihelion dist = 1.96614066 AU Mag: H = 9.00, G = 0.15 Epoch of elements : MJD 56267.72800000 TDT (2012 Dec 06.728) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 6 182 Elsa 17h 26.2m UT 10.7 8 18 45.320 19 18 7.27TYC 1386-00300-1 11.5 12.2 45 43.9 1.261 -0.164 3.35 147.2391 19.301 -83.72 -22.59 17.4367 -0.41207 -0.27841 -0.32826 0.48009 -0.00400 0.00095 2000 28.73277820121129.00000310.273284107.239726 2.0044650.18631335 2.4163364 1.9661407 9.1 5.00.15 RATE 2.6240250 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.055 0.033 1 1.86 0.042 0 0-1 4 056264.0020121206_0300-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 29, 22:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org