IOTA/IOTA-ES occultation update for (577) Rhea / TYC 1788-00289-1 event on 2010 Oct 03, 04:54 UT Visible from Summary ------- On 2010 Oct 03 UT, the 40 km diameter asteroid (577) Rhea will occult a 12.3 mag star in the constellation Aries for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.3 mag to 14.5 mag (the magnitude of the asteroid) for at most 5.8 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: 53 * date and approx. time of event: 2010 Oct 03, 04:44 - 2010 Oct 03, 05:07 UT * magnitude of target star: 12.3 * magnitude drop [mag]: 2.3 * estimated maximum duration [s]: 5.8 * Moon: 28 % sunlit, 74° distance * Sun: 137° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 44 * 1 sigma uncertainty interval [path widths]: +/- 1.19 * 1 sigma uncertainty interval [seconds]: +/- 9.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .041 +/- .028) * 1 sigma uncertainty ellipse (major, minor, PA): ( .041", .027", 80° ) * approx speed of asteroid's shadow [km/s]: 6.8680 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1788-00289-1 by 577 Rhea on 2010 Oct 3 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 ' " Latitude Latitude Latitude Latitude -143 0 0 27 36 37 5 7 20 1 62 -25 27 50 9 27 23 8 28 22 26 .. .. .. -142 0 0 28 5 25 5 7 19 2 63 -26 28 18 56 27 51 56 28 51 13 .. .. .. -141 0 0 28 34 4 5 7 18 3 63 -27 28 47 35 28 20 35 29 19 52 27 48 36 -140 0 0 29 2 34 5 7 17 4 63 -28 29 16 4 28 49 5 29 48 21 28 17 6 -139 0 0 29 30 53 5 7 16 5 64 -28 29 44 23 29 17 24 30 16 39 28 45 26 -138 0 0 29 59 1 5 7 14 6 64 -29 30 12 31 29 45 32 30 44 45 29 13 35 -137 0 0 30 26 57 5 7 12 7 65 -30 30 40 27 30 13 29 31 12 41 29 41 32 -136 0 0 30 54 41 5 7 10 8 65 -31 31 8 10 30 41 13 31 40 23 30 9 18 -135 0 0 31 22 12 5 7 8 9 66 -31 31 35 41 31 8 45 32 7 53 30 36 51 -134 0 0 31 49 30 5 7 5 10 67 -32 32 2 58 31 36 4 32 35 9 31 4 11 -133 0 0 32 16 34 5 7 2 11 67 -33 32 30 2 32 3 8 33 2 10 31 31 16 -132 0 0 32 43 23 5 6 58 12 68 -33 32 56 50 32 29 58 33 28 58 31 58 8 -131 0 0 33 9 58 5 6 55 13 68 -34 33 23 24 32 56 33 33 55 30 32 24 45 -130 0 0 33 36 17 5 6 51 13 69 -34 33 49 42 33 22 53 34 21 46 32 51 7 -129 0 0 34 2 20 5 6 47 14 69 -35 34 15 45 33 48 57 34 47 46 33 17 12 -128 0 0 34 28 7 5 6 43 15 70 -36 34 41 30 34 14 45 35 13 30 33 43 2 -127 0 0 34 53 37 5 6 38 16 70 -36 35 7 0 34 40 15 35 38 57 34 8 35 -126 0 0 35 18 50 5 6 34 17 71 -37 35 32 11 35 5 29 36 4 7 34 33 51 -125 0 0 35 43 45 5 6 29 18 72 -37 35 57 6 35 30 26 36 28 59 34 58 50 -124 0 0 36 8 22 5 6 24 19 72 -38 36 21 42 35 55 4 36 53 33 35 23 31 -123 0 0 36 32 42 5 6 18 20 73 -38 36 46 1 36 19 25 37 17 48 35 47 54 -122 0 0 36 56 43 5 6 13 21 74 -39 37 10 0 36 43 27 37 41 45 36 11 59 -121 0 0 37 20 25 5 6 7 21 74 -39 37 33 41 37 7 10 38 5 24 36 35 45 -120 0 0 37 43 48 5 6 1 22 75 -40 37 57 3 37 30 34 38 28 43 36 59 12 -119 0 0 38 6 52 5 5 55 23 76 -40 38 20 6 37 53 40 38 51 43 37 22 20 -118 0 0 38 29 37 5 5 49 24 76 -41 38 42 49 38 16 25 39 14 23 37 45 9 -117 0 0 38 52 2 5 5 43 25 77 -41 39 5 13 38 38 52 39 36 43 38 7 38 -116 0 0 39 14 7 5 5 37 26 78 -41 39 27 17 39 0 58 39 58 44 38 29 47 -115 0 0 39 35 52 5 5 30 26 78 -42 39 49 0 39 22 44 40 20 24 38 51 37 -114 0 0 39 57 16 5 5 23 27 79 -42 40 10 24 39 44 10 40 41 45 39 13 6 -113 0 0 40 18 21 5 5 16 28 80 -43 40 31 27 40 5 16 41 2 45 39 34 15 -112 0 0 40 39 5 5 5 9 29 81 -43 40 52 10 40 26 2 41 23 24 39 55 4 -111 0 0 40 59 29 5 5 2 30 81 -43 41 12 32 40 46 27 41 43 43 40 15 32 -110 0 0 41 19 32 5 4 55 30 82 -43 41 32 34 41 6 31 42 3 41 40 35 40 -109 0 0 41 39 14 5 4 48 31 83 -44 41 52 15 41 26 15 42 23 18 40 55 27 -108 0 0 41 58 36 5 4 40 32 84 -44 42 11 35 41 45 38 42 42 35 41 14 54 -107 0 0 42 17 37 5 4 33 33 84 -44 42 30 34 42 4 40 43 1 31 41 34 0 -106 0 0 42 36 17 5 4 25 33 85 -44 42 49 13 42 23 22 43 20 6 41 52 45 -105 0 0 42 54 36 5 4 17 34 86 -45 43 7 30 42 41 43 43 38 20 42 11 9 -104 0 0 43 12 34 5 4 9 35 87 -45 43 25 27 42 59 42 43 56 13 42 29 12 -103 0 0 43 30 11 5 4 1 36 88 -45 43 43 3 43 17 21 44 13 45 42 46 54 -102 0 0 43 47 28 5 3 53 36 89 -45 44 0 18 43 34 39 44 30 57 43 4 16 -101 0 0 44 4 24 5 3 45 37 89 -45 44 17 12 43 51 37 44 47 48 43 21 17 -100 0 0 44 20 59 5 3 37 38 90 -45 44 33 46 44 8 13 45 4 17 43 37 57 - 99 0 0 44 37 13 5 3 29 38 91 -46 44 49 59 44 24 29 45 20 27 43 54 16 - 98 0 0 44 53 6 5 3 21 39 92 -46 45 5 50 44 40 24 45 36 15 44 10 14 - 97 0 0 45 8 39 5 3 12 40 93 -46 45 21 22 44 55 58 45 51 43 44 25 52 - 96 0 0 45 23 51 5 3 4 40 94 -46 45 36 32 45 11 11 46 6 50 44 41 9 - 95 0 0 45 38 43 5 2 55 41 95 -46 45 51 22 45 26 4 46 21 36 44 56 5 - 94 0 0 45 53 14 5 2 47 42 96 -46 46 5 52 45 40 37 46 36 2 45 10 41 - 93 0 0 46 7 24 5 2 38 42 97 -46 46 20 1 45 54 49 46 50 8 45 24 57 - 92 0 0 46 21 14 5 2 30 43 98 -46 46 33 50 46 8 40 47 3 53 45 38 52 - 91 0 0 46 34 44 5 2 21 44 99 -46 46 47 18 46 22 12 47 17 18 45 52 26 - 90 0 0 46 47 54 5 2 12 44 100 -46 47 0 26 46 35 23 47 30 23 46 5 40 - 89 0 0 47 0 43 5 2 4 45 101 -46 47 13 14 46 48 13 47 43 8 46 18 35 - 88 0 0 47 13 13 5 1 55 45 102 -46 47 25 42 47 0 44 47 55 32 46 31 8 - 87 0 0 47 25 22 5 1 46 46 103 -46 47 37 51 47 12 55 48 7 37 46 43 22 - 86 0 0 47 37 12 5 1 37 47 104 -46 47 49 39 47 24 46 48 19 22 46 55 16 - 85 0 0 47 48 42 5 1 28 47 105 -46 48 1 7 47 36 17 48 30 48 47 6 51 - 84 0 0 47 59 52 5 1 19 48 106 -46 48 12 16 47 47 28 48 41 53 47 18 5 - 83 0 0 48 10 42 5 1 10 48 107 -46 48 23 5 47 58 20 48 52 40 47 29 0 - 82 0 0 48 21 13 5 1 1 49 108 -46 48 33 35 48 8 53 49 3 7 47 39 35 - 81 0 0 48 31 25 5 0 52 49 110 -45 48 43 46 48 19 5 49 13 14 47 49 51 - 80 0 0 48 41 17 5 0 43 50 111 -45 48 53 37 48 28 59 49 23 2 47 59 47 - 79 0 0 48 50 50 5 0 34 50 112 -45 49 3 9 48 38 33 49 32 32 48 9 24 - 78 0 0 49 0 4 5 0 25 51 113 -45 49 12 22 48 47 48 49 41 42 48 18 42 - 77 0 0 49 8 59 5 0 16 51 114 -45 49 21 16 48 56 44 49 50 33 48 27 40 - 76 0 0 49 17 35 5 0 7 52 116 -45 49 29 51 49 5 22 49 59 5 48 36 20 - 75 0 0 49 25 53 4 59 58 52 117 -45 49 38 7 49 13 40 50 7 19 48 44 41 - 74 0 0 49 33 51 4 59 49 53 118 -44 49 46 4 49 21 39 50 15 14 48 52 43 - 73 0 0 49 41 31 4 59 39 53 119 -44 49 53 43 49 29 20 50 22 51 49 0 26 - 72 0 0 49 48 52 4 59 30 54 121 -44 50 1 4 49 36 42 50 30 9 49 7 50 - 71 0 0 49 55 55 4 59 21 54 122 -44 50 8 6 49 43 46 50 37 9 49 14 56 - 70 0 0 50 2 40 4 59 12 55 123 -44 50 14 49 49 50 31 50 43 50 49 21 43 - 69 0 0 50 9 6 4 59 2 55 125 -43 50 21 14 49 56 58 50 50 14 49 28 12 - 68 0 0 50 15 14 4 58 53 56 126 -43 50 27 21 50 3 7 50 56 19 49 34 23 - 67 0 0 50 21 3 4 58 44 56 127 -43 50 33 10 50 8 58 51 2 6 49 40 15 - 66 0 0 50 26 35 4 58 35 57 129 -43 50 38 41 50 14 30 51 7 35 49 45 49 - 65 0 0 50 31 49 4 58 25 57 130 -42 50 43 54 50 19 44 51 12 46 49 51 5 - 64 0 0 50 36 44 4 58 16 57 132 -42 50 48 49 50 24 41 51 17 40 49 56 3 - 63 0 0 50 41 22 4 58 6 58 133 -42 50 53 27 50 29 19 51 22 16 50 0 43 - 62 0 0 50 45 42 4 57 57 58 135 -42 50 57 46 50 33 40 51 26 34 50 5 5 - 61 0 0 50 49 45 4 57 48 59 136 -41 51 1 48 50 37 42 51 30 34 50 9 9 - 60 0 0 50 53 29 4 57 38 59 138 -41 51 5 32 50 41 28 51 34 17 50 12 55 - 59 0 0 50 56 56 4 57 29 59 139 -41 51 8 58 50 44 55 51 37 42 50 16 23 - 58 0 0 51 0 5 4 57 19 60 141 -40 51 12 7 50 48 5 51 40 50 50 19 34 - 57 0 0 51 2 57 4 57 10 60 143 -40 51 14 59 50 50 57 51 43 41 50 22 27 - 56 0 0 51 5 31 4 57 1 60 144 -40 51 17 32 50 53 31 51 46 14 50 25 3 - 55 0 0 51 7 48 4 56 51 61 146 -39 51 19 49 50 55 48 51 48 29 50 27 20 - 54 0 0 51 9 47 4 56 42 61 148 -39 51 21 48 50 57 48 51 50 28 50 29 21 - 53 0 0 51 11 29 4 56 32 61 149 -39 51 23 30 50 59 30 51 52 9 50 31 3 - 52 0 0 51 12 54 4 56 22 61 151 -38 51 24 54 51 0 55 51 53 33 50 32 28 - 51 0 0 51 14 1 4 56 13 62 153 -38 51 26 1 51 2 2 51 54 39 50 33 36 - 50 0 0 51 14 51 4 56 3 62 155 -38 51 26 51 51 2 52 51 55 29 50 34 26 - 49 0 0 51 15 23 4 55 54 62 156 -37 51 27 23 51 3 24 51 56 1 50 34 59 - 48 0 0 51 15 38 4 55 44 62 158 -37 51 27 38 51 3 40 51 56 16 50 35 14 - 47 0 0 51 15 36 4 55 35 63 160 -37 51 27 36 51 3 37 51 56 14 50 35 12 - 46 0 0 51 15 17 4 55 25 63 162 -36 51 27 17 51 3 18 51 55 55 50 34 52 - 45 0 0 51 14 40 4 55 15 63 164 -36 51 26 40 51 2 41 51 55 18 50 34 15 - 44 0 0 51 13 46 4 55 6 63 166 -36 51 25 46 51 1 47 51 54 25 50 33 20 - 43 0 0 51 12 34 4 54 56 63 168 -35 51 24 35 51 0 35 51 53 14 50 32 8 - 42 0 0 51 11 6 4 54 46 64 170 -35 51 23 6 50 59 6 51 51 46 50 30 39 - 41 0 0 51 9 19 4 54 36 64 172 -34 51 21 20 50 57 20 51 50 1 50 28 52 - 40 0 0 51 7 16 4 54 27 64 174 -34 51 19 17 50 55 16 51 47 58 50 26 47 - 39 0 0 51 4 55 4 54 17 64 175 -34 51 16 57 50 52 55 51 45 39 50 24 25 - 38 0 0 51 2 17 4 54 7 64 177 -33 51 14 19 50 50 16 51 43 2 50 21 46 - 37 0 0 50 59 21 4 53 57 64 179 -33 51 11 23 50 47 20 51 40 7 50 18 48 - 36 0 0 50 56 8 4 53 47 64 181 -32 51 8 11 50 44 6 51 36 56 50 15 34 - 35 0 0 50 52 37 4 53 38 64 183 -32 51 4 40 50 40 35 51 33 27 50 12 1 - 34 0 0 50 48 49 4 53 28 64 186 -31 51 0 53 50 36 46 51 29 40 50 8 11 - 33 0 0 50 44 43 4 53 18 64 188 -31 50 56 47 50 32 40 51 25 36 50 4 3 - 32 0 0 50 40 19 4 53 8 64 190 -31 50 52 24 50 28 16 51 21 15 49 59 38 - 31 0 0 50 35 38 4 52 58 64 192 -30 50 47 44 50 23 34 51 16 36 49 54 54 - 30 0 0 50 30 39 4 52 48 64 194 -30 50 42 45 50 18 34 51 11 39 49 49 53 - 29 0 0 50 25 22 4 52 38 64 196 -29 50 37 29 50 13 17 51 6 25 49 44 34 - 28 0 0 50 19 48 4 52 28 64 198 -29 50 31 56 50 7 41 51 0 53 49 38 57 - 27 0 0 50 13 55 4 52 18 64 200 -28 50 26 4 50 1 48 50 55 3 49 33 2 - 26 0 0 50 7 45 4 52 8 64 202 -28 50 19 54 49 55 36 50 48 55 49 26 48 - 25 0 0 50 1 16 4 51 58 63 204 -27 50 13 26 49 49 7 50 42 29 49 20 17 - 24 0 0 49 54 29 4 51 48 63 206 -27 50 6 40 49 42 19 50 35 46 49 13 27 - 23 0 0 49 47 24 4 51 37 63 207 -26 49 59 36 49 35 13 50 28 44 49 6 19 - 22 0 0 49 40 1 4 51 27 63 209 -26 49 52 14 49 27 49 50 21 24 48 58 53 - 21 0 0 49 32 20 4 51 17 63 211 -25 49 44 34 49 20 7 50 13 46 48 51 8 - 20 0 0 49 24 20 4 51 7 63 213 -25 49 36 35 49 12 6 50 5 49 48 43 4 - 19 0 0 49 16 1 4 50 57 62 215 -24 49 28 17 49 3 46 49 57 34 48 34 42 - 18 0 0 49 7 24 4 50 46 62 217 -24 49 19 41 48 55 8 49 49 1 48 26 2 - 17 0 0 48 58 28 4 50 36 62 219 -23 49 10 47 48 46 11 49 40 9 48 17 2 - 16 0 0 48 49 14 4 50 26 62 221 -23 49 1 33 48 36 56 49 30 59 48 7 44 - 15 0 0 48 39 41 4 50 16 61 222 -22 48 52 1 48 27 21 49 21 29 47 58 7 - 14 0 0 48 29 49 4 50 5 61 224 -22 48 42 10 48 17 28 49 11 41 47 48 11 - 13 0 0 48 19 37 4 49 55 61 226 -21 48 32 0 48 7 16 49 1 34 47 37 56 - 12 0 0 48 9 7 4 49 44 60 228 -21 48 21 32 47 56 44 48 51 8 47 27 22 - 11 0 0 47 58 18 4 49 34 60 229 -20 48 10 43 47 45 54 48 40 23 47 16 28 - 10 0 0 47 47 9 4 49 24 60 231 -19 47 59 36 47 34 44 48 29 19 47 5 15 - 9 0 0 47 35 42 4 49 13 59 233 -19 47 48 10 47 23 15 48 17 56 46 53 43 - 8 0 0 47 23 54 4 49 3 59 234 -18 47 36 24 47 11 26 48 6 13 46 41 52 - 7 0 0 47 11 48 4 48 52 58 236 -18 47 24 19 46 59 18 47 54 11 46 29 40 - 6 0 0 46 59 22 4 48 42 58 237 -17 47 11 54 46 46 51 47 41 49 46 17 10 - 5 0 0 46 46 36 4 48 31 57 239 -17 46 59 9 46 34 4 47 29 8 46 4 19 - 4 0 0 46 33 30 4 48 21 57 240 -16 46 46 5 46 20 57 47 16 7 45 51 9 - 3 0 0 46 20 5 4 48 10 57 242 -15 46 32 41 46 7 30 47 2 47 45 37 40 - 2 0 0 46 6 20 4 48 0 56 243 -15 46 18 58 45 53 44 46 49 7 45 23 50 - 1 0 0 45 52 15 4 47 49 56 245 -14 46 4 54 45 39 38 46 35 7 45 9 40 0 0 0 45 37 51 4 47 39 55 246 -14 45 50 31 45 25 12 46 20 47 44 55 11 1 0 0 45 23 6 4 47 28 55 248 -13 45 35 48 45 10 26 46 6 7 44 40 21 2 0 0 45 8 1 4 47 18 54 249 -12 45 20 45 44 55 19 45 51 7 44 25 12 3 0 0 44 52 36 4 47 7 53 250 -12 45 5 21 44 39 53 45 35 47 44 9 42 4 0 0 44 36 52 4 46 57 53 252 -11 44 49 38 44 24 7 45 20 7 43 53 53 5 0 0 44 20 47 4 46 46 52 253 -10 44 33 34 44 8 1 45 4 7 43 37 43 6 0 0 44 4 22 4 46 36 52 254 -10 44 17 11 43 51 34 44 47 47 43 21 13 7 0 0 43 47 36 4 46 25 51 255 -9 44 0 27 43 34 47 44 31 7 43 4 23 8 0 0 43 30 31 4 46 15 51 256 -8 43 43 23 43 17 41 44 14 6 42 47 13 9 0 0 43 13 6 4 46 4 50 258 -8 43 25 59 43 0 14 43 56 46 42 29 43 10 0 0 42 55 20 4 45 54 49 259 -7 43 8 15 42 42 27 43 39 5 42 11 52 11 0 0 42 37 14 4 45 43 49 260 -6 42 50 11 42 24 20 43 21 4 41 53 42 12 0 0 42 18 49 4 45 33 48 261 -6 42 31 46 42 5 52 43 2 43 41 35 11 13 0 0 42 0 3 4 45 23 47 262 -5 42 13 2 41 47 5 42 44 2 41 16 21 14 0 0 41 40 57 4 45 12 47 263 -4 41 53 57 41 27 58 42 25 1 40 57 11 15 0 0 41 21 31 4 45 2 46 264 -3 41 34 33 41 8 31 42 5 40 40 37 40 16 0 0 41 1 46 4 44 52 45 265 -3 41 14 49 40 48 44 41 45 59 40 17 50 17 0 0 40 41 40 4 44 42 45 266 -2 40 54 45 40 28 38 41 25 58 39 57 41 18 0 0 40 21 16 4 44 32 44 267 -1 40 34 21 40 8 11 41 5 38 39 37 11 19 0 0 40 0 31 4 44 21 43 268 0 40 13 38 39 47 26 40 44 58 39 16 22 Uncertainty in time = +/- 10 secs Prediction of 2009 Apr 19.0 Data for the target star ------------------------ * name: TYC 1788-00289-1 * constellation : Aries * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 03 13 27.7565 DE: +24 58 38.892 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .023 ) * V mag [mag]: 12.3 * B mag [mag]: 12.7 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (577) Rhea approx. diameter [km]: 40 approx. diameter ["]: .024 distance from Earth [AU]: 2.31600 * orbital information: orbit source: Preston date of fit: 2009 Apr 18 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 906 number of rejected observations: 82 time covered by the observations: 1905 Oct 20 - 2008 Jul 25 1 sigma uncertainty ellipse (major, minor, PA): 0.034, 0.015, 75° remarks: * orbital elements for (577) Rhea : Mean anomaly = 82.11584416 deg Arg. of pericenter = 331.59587243 deg Long. of node = 328.62565130 deg Inclination = 5.29786388 deg Eccentricity = 0.15459528 Semimajor axis = 3.11191018 AU Perihelion dist = 2.63082357 AU Mag: H = 9.26, G = 0.15 Epoch of elements : MJD 55472.20400000 TDT (2010 Oct 03.204) ------ occelmnt file for Occult BEGIN ----------------------------------- 2010 Oct 3 577 Rhea 4h 53.4m UT 12.3 3 13 27.756 24 58 38.89TYC 1788-00289-1 12.7 14.5 40 5.8 2.316 -1.080 1.14 -36.7755 24.978 103.95 -3.92 4.8897 0.03410 0.43119 -3.86477 0.30140 -0.00372 -0.00155 2000 81.720136201010 1.00000331.595872328.625651 5.2978640.15459528 3.1119102 2.6308236 9.5 5.00.15 RATE 1.7954090 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.041 0.027 80 2.19 0.028 0 54940.0020101003_0289-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2009 Apr 18, 22:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org