IOTA/IOTA-ES occultation update for (27) Euterpe / TYC 6361-00836-1 event on 2007 Aug 05, 09:41 UT Visible from USA, Mexico Summary ------- On 2007 Aug 05 UT, the 124 km diameter asteroid (27) Euterpe will occult a 12.3 mag star in the constellation Capricornus for observers along a path across USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.2 mag to 10.4 mag (the magnitude of the asteroid) for at most 10.6 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: UCAC. The event at a glimpse ---------------------- * Rank: 99 * date and approx. time of event: 2007 Aug 05, 09:32 - 2007 Aug 05, 09:48 UT * magnitude of target star: 12.3 * magnitude drop [mag]: 0.2 * estimated maximum duration [s]: 10.6 * Moon: 56 % sunlit, 76° distance * Sun: 172° distance * rough path description: USA, Mexico Additional comments ------------------- very small mag drop The occultation path -------------------- * approximate projected width [km]: 147 * 1 sigma uncertainty interval [path widths]: +/- 0.23 * 1 sigma uncertainty interval [seconds]: +/- 2.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .026 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .026", .024", 85° ) * approx speed of asteroid's shadow [km/s]: 11.7139 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6361-00836-1 by 27 Euterpe on 2007 Aug 05 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 136 0 0 11 3 14 9 48 13 0 107 -8 11 45 13 .. .. .. 12 4 39 .. .. .. 137 0 0 10 45 46 9 48 13 1 107 -9 11 27 39 10 4 13 11 47 2 .. .. .. 138 0 0 10 28 49 9 48 12 2 107 -10 11 10 36 9 47 23 11 29 56 .. .. .. 139 0 0 10 12 23 9 48 12 3 107 -11 10 54 4 9 31 3 11 13 21 .. .. .. 140 0 0 9 56 29 9 48 11 4 108 -12 10 38 3 9 15 14 10 57 17 8 56 23 141 0 0 9 41 6 9 48 10 5 108 -13 10 22 34 8 59 57 10 41 46 8 41 8 142 0 0 9 26 14 9 48 9 7 108 -14 10 7 37 8 45 11 10 26 45 8 26 24 143 0 0 9 11 54 9 48 8 8 108 -15 9 53 11 8 30 56 10 12 17 8 12 12 144 0 0 8 58 6 9 48 6 9 108 -16 9 39 17 8 17 13 9 58 21 7 58 32 145 0 0 8 44 49 9 48 4 10 108 -17 9 25 55 8 4 2 9 44 56 7 45 22 146 0 0 8 32 4 9 48 2 11 109 -18 9 13 5 7 51 22 9 32 4 7 32 44 147 0 0 8 19 51 9 48 0 12 109 -19 9 0 47 7 39 13 9 19 44 7 20 38 148 0 0 8 8 9 9 47 58 12 109 -20 8 49 1 7 27 36 9 7 55 7 9 3 149 0 0 7 57 0 9 47 55 13 109 -21 8 37 47 7 16 31 8 56 39 6 58 0 150 0 0 7 46 22 9 47 53 14 109 -22 8 27 5 7 5 58 8 45 56 6 47 29 151 0 0 7 36 17 9 47 50 15 109 -23 8 16 56 6 55 56 8 35 44 6 37 29 152 0 0 7 26 43 9 47 47 16 110 -24 8 7 18 6 46 27 8 26 4 6 28 1 153 0 0 7 17 41 9 47 43 17 110 -24 7 58 13 6 37 28 8 16 57 6 19 4 154 0 0 7 9 12 9 47 40 18 110 -25 7 49 39 6 29 2 8 8 22 6 10 40 155 0 0 7 1 14 9 47 36 19 110 -26 7 41 38 6 21 7 8 0 20 6 2 46 156 0 0 6 53 48 9 47 33 20 110 -27 7 34 9 6 13 44 7 52 49 5 55 25 157 0 0 6 46 54 9 47 29 21 111 -28 7 27 12 6 6 53 7 45 51 5 48 35 158 0 0 6 40 31 9 47 25 22 111 -29 7 20 47 6 0 34 7 39 24 5 42 17 159 0 0 6 34 41 9 47 20 23 111 -30 7 14 54 5 54 46 7 33 30 5 36 30 160 0 0 6 29 22 9 47 16 24 111 -31 7 9 33 5 49 30 7 28 8 5 31 15 161 0 0 6 24 36 9 47 11 25 112 -32 7 4 44 5 44 45 7 23 18 5 26 31 162 0 0 6 20 21 9 47 7 26 112 -33 7 0 27 5 40 32 7 19 1 5 22 19 163 0 0 6 16 37 9 47 2 27 112 -34 6 56 42 5 36 50 7 15 15 5 18 38 164 0 0 6 13 26 9 46 57 28 112 -35 6 53 29 5 33 40 7 12 1 5 15 28 165 0 0 6 10 46 9 46 52 29 113 -36 6 50 48 5 31 2 7 9 19 5 12 50 166 0 0 6 8 38 9 46 46 30 113 -37 6 48 38 5 28 54 7 7 9 5 10 44 167 0 0 6 7 1 9 46 41 31 113 -37 6 47 1 5 27 18 7 5 31 5 9 8 168 0 0 6 5 55 9 46 35 31 114 -38 6 45 54 5 26 14 7 4 24 5 8 4 169 0 0 6 5 21 9 46 29 32 114 -39 6 45 20 5 25 40 7 3 49 5 7 31 170 0 0 6 5 19 9 46 23 33 114 -40 6 45 17 5 25 38 7 3 46 5 7 29 171 0 0 6 5 48 9 46 17 34 115 -41 6 45 46 5 26 7 7 4 15 5 7 58 172 0 0 6 6 48 9 46 11 35 115 -42 6 46 46 5 27 7 7 5 15 5 8 58 173 0 0 6 8 19 9 46 5 36 115 -42 6 48 17 5 28 38 7 6 47 5 10 29 174 0 0 6 10 21 9 45 59 37 116 -43 6 50 20 5 30 40 7 8 50 5 12 31 175 0 0 6 12 55 9 45 52 38 116 -44 6 52 54 5 33 13 7 11 24 5 15 3 176 0 0 6 16 0 9 45 45 38 117 -45 6 56 0 5 36 17 7 14 30 5 18 7 177 0 0 6 19 35 9 45 38 39 117 -46 6 59 36 5 39 51 7 18 7 5 21 41 178 0 0 6 23 41 9 45 32 40 118 -46 7 3 44 5 43 57 7 22 15 5 25 45 179 0 0 6 28 19 9 45 24 41 118 -47 7 8 22 5 48 32 7 26 54 5 30 21 180 0 0 6 33 27 9 45 17 42 119 -48 7 13 32 5 53 39 7 32 4 5 35 26 -179 0 0 6 39 5 9 45 10 42 120 -49 7 19 12 5 59 16 7 37 46 5 41 2 -178 0 0 6 45 14 9 45 3 43 120 -49 7 25 23 6 5 23 7 43 58 5 47 9 -177 0 0 6 51 54 9 44 55 44 121 -50 7 32 5 6 12 1 7 50 40 5 53 46 -176 0 0 6 59 4 9 44 47 45 122 -51 7 39 18 6 19 9 7 57 54 6 0 52 -175 0 0 7 6 45 9 44 40 45 122 -52 7 47 0 6 26 47 8 5 38 6 8 29 -174 0 0 7 14 55 9 44 32 46 123 -52 7 55 14 6 34 55 8 13 52 6 16 36 -173 0 0 7 23 36 9 44 24 47 124 -53 8 3 57 6 43 33 8 22 37 6 25 13 -172 0 0 7 32 47 9 44 16 48 125 -53 8 13 11 6 52 41 8 31 53 6 34 20 -171 0 0 7 42 28 9 44 8 48 126 -54 8 22 55 7 2 18 8 41 38 6 43 56 -170 0 0 7 52 38 9 44 0 49 127 -55 8 33 9 7 12 26 8 51 54 6 54 2 -169 0 0 8 3 19 9 43 51 50 127 -55 8 43 53 7 23 3 9 2 39 7 4 37 -168 0 0 8 14 29 9 43 43 50 129 -56 8 55 7 7 34 9 9 13 55 7 15 42 -167 0 0 8 26 8 9 43 35 51 130 -56 9 6 50 7 45 45 9 25 40 7 27 16 -166 0 0 8 38 17 9 43 26 52 131 -57 9 19 3 7 57 49 9 37 55 7 39 19 -165 0 0 8 50 55 9 43 17 52 132 -57 9 31 45 8 10 23 9 50 39 7 51 51 -164 0 0 9 4 2 9 43 9 53 133 -57 9 44 57 8 23 26 10 3 52 8 4 52 -163 0 0 9 17 38 9 43 0 53 134 -58 9 58 37 8 36 58 10 17 35 8 18 21 -162 0 0 9 31 43 9 42 51 54 136 -58 10 12 47 8 50 58 10 31 46 8 32 20 -161 0 0 9 46 16 9 42 42 54 137 -59 10 27 25 9 5 27 10 46 27 8 46 46 -160 0 0 10 1 18 9 42 33 55 138 -59 10 42 31 9 20 24 11 1 36 9 1 41 -159 0 0 10 16 48 9 42 24 55 140 -59 10 58 7 9 35 49 11 17 13 9 17 4 -158 0 0 10 32 46 9 42 15 55 141 -59 11 14 10 9 51 42 11 33 19 9 32 54 -157 0 0 10 49 12 9 42 6 56 143 -59 11 30 41 10 8 2 11 49 53 9 49 13 -156 0 0 11 6 6 9 41 57 56 144 -60 11 47 40 10 24 50 12 6 55 10 5 58 -155 0 0 11 23 27 9 41 47 56 146 -60 12 5 7 10 42 6 12 24 24 10 23 11 -154 0 0 11 41 15 9 41 38 57 147 -60 12 23 1 10 59 48 12 42 21 10 40 51 -153 0 0 11 59 30 9 41 29 57 149 -60 12 41 22 11 17 58 13 0 45 10 58 58 -152 0 0 12 18 12 9 41 20 57 151 -60 13 0 10 11 36 34 13 19 35 11 17 31 -151 0 0 12 37 20 9 41 10 57 153 -60 13 19 24 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17 5 13 18 52 22 16 45 26 -136 0 0 18 13 33 9 38 49 55 179 -54 18 57 19 17 30 9 19 17 36 17 10 19 -135 0 0 18 38 56 9 38 40 55 181 -54 19 22 50 17 55 25 19 43 10 17 35 32 -134 0 0 19 4 39 9 38 30 54 182 -53 19 48 40 18 21 1 20 9 3 18 1 4 -133 0 0 19 30 41 9 38 21 54 184 -52 20 14 49 18 46 56 20 35 16 18 26 56 -132 0 0 19 57 2 9 38 12 54 185 -52 20 41 17 19 13 10 21 1 47 18 53 7 -131 0 0 20 23 40 9 38 3 53 187 -51 21 8 3 19 39 41 21 28 36 19 19 35 -130 0 0 20 50 36 9 37 54 52 188 -50 21 35 6 20 6 30 21 55 43 19 46 21 -129 0 0 21 17 48 9 37 45 52 190 -49 22 2 25 20 33 35 22 23 6 20 13 23 -128 0 0 21 45 17 9 37 36 51 191 -49 22 30 1 21 0 57 22 50 44 20 40 42 -127 0 0 22 13 1 9 37 27 51 192 -48 22 57 52 21 28 34 23 18 39 21 8 15 -126 0 0 22 40 59 9 37 19 50 193 -47 23 25 57 21 56 26 23 46 47 21 36 4 -125 0 0 23 9 12 9 37 10 49 195 -46 23 54 17 22 24 32 24 15 10 22 4 7 -124 0 0 23 37 37 9 37 2 49 196 -46 24 22 49 22 52 51 24 43 46 22 32 23 -123 0 0 24 6 16 9 36 53 48 197 -45 24 51 34 23 21 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32 9 56 29 54 31 -108 0 0 31 31 53 9 35 2 36 212 -31 32 18 33 30 45 41 32 40 10 30 24 35 -107 0 0 32 2 1 9 34 55 35 213 -31 32 48 45 31 15 45 33 10 24 30 54 38 -106 0 0 32 32 7 9 34 49 34 213 -30 33 18 54 31 45 49 33 40 36 31 24 40 -105 0 0 33 2 11 9 34 43 33 214 -29 33 49 2 32 15 50 34 10 44 31 54 39 -104 0 0 33 32 12 9 34 37 32 215 -28 34 19 5 32 45 47 34 40 49 32 24 36 -103 0 0 34 2 8 9 34 32 31 216 -27 34 49 3 33 15 41 35 10 48 32 54 28 -102 0 0 34 31 59 9 34 26 31 217 -26 35 18 57 33 45 30 35 40 43 33 24 16 -101 0 0 35 1 44 9 34 21 30 217 -25 35 48 43 34 15 13 36 10 30 33 53 59 -100 0 0 35 31 22 9 34 16 29 218 -24 36 18 23 34 44 49 36 40 10 34 23 34 - 99 0 0 36 0 52 9 34 11 28 219 -23 36 47 54 35 14 18 37 9 42 34 53 3 - 98 0 0 36 30 14 9 34 6 27 220 -22 37 17 17 35 43 39 37 39 5 35 22 23 - 97 0 0 36 59 26 9 34 1 26 220 -21 37 46 30 36 12 51 38 8 18 35 51 34 - 96 0 0 37 28 28 9 33 57 25 221 -21 38 15 32 36 41 53 38 37 21 36 20 36 - 95 0 0 37 57 19 9 33 53 24 222 -20 38 44 23 37 10 44 39 6 12 36 49 27 - 94 0 0 38 25 58 9 33 48 24 222 -19 39 13 2 37 39 24 39 34 51 37 18 7 - 93 0 0 38 54 25 9 33 44 23 223 -18 39 41 28 38 7 51 40 3 17 37 46 35 - 92 0 0 39 22 39 9 33 41 22 224 -17 40 9 41 38 36 6 40 31 29 38 14 51 - 91 0 0 39 50 39 9 33 37 21 225 -16 40 37 40 39 4 8 40 59 27 38 42 53 - 90 0 0 40 18 25 9 33 34 20 225 -15 41 5 23 39 31 55 41 27 10 39 10 41 - 89 0 0 40 45 55 9 33 30 19 226 -14 41 32 52 39 59 27 41 54 37 39 38 14 - 88 0 0 41 13 10 9 33 27 18 227 -13 42 0 4 40 26 44 42 21 48 40 5 32 - 87 0 0 41 40 8 9 33 24 18 227 -13 42 27 0 40 53 45 42 48 43 40 32 34 - 86 0 0 42 6 50 9 33 21 17 228 -12 42 53 38 41 20 29 43 15 19 40 59 20 - 85 0 0 42 33 13 9 33 19 16 229 -11 43 19 58 41 46 56 43 41 38 41 25 48 - 84 0 0 42 59 19 9 33 16 15 230 -10 43 46 1 42 13 6 44 7 39 41 51 59 - 83 0 0 43 25 7 9 33 14 14 230 -9 44 11 44 42 38 57 44 33 21 42 17 52 - 82 0 0 43 50 35 9 33 11 13 231 -8 44 37 8 43 4 29 44 58 43 42 43 26 - 81 0 0 44 15 44 9 33 9 13 232 -8 45 2 13 43 29 43 45 23 45 43 8 42 - 80 0 0 44 40 33 9 33 7 12 232 -7 45 26 57 43 54 37 45 48 28 43 33 38 - 79 0 0 45 5 2 9 33 6 11 233 -6 45 51 21 44 19 11 46 12 49 43 58 14 - 78 0 0 45 29 11 9 33 4 10 234 -5 46 15 25 44 43 24 46 36 50 44 22 30 - 77 0 0 45 52 59 9 33 3 9 235 -4 46 39 7 45 7 17 47 0 30 44 46 25 - 76 0 0 46 16 25 9 33 1 9 235 -4 47 2 28 45 30 50 47 23 48 45 10 0 - 75 0 0 46 39 31 9 33 0 8 236 -3 47 25 27 45 54 0 47 46 44 45 33 13 - 74 0 0 47 2 14 9 32 59 7 237 -2 47 48 4 46 16 50 48 9 19 45 56 5 - 73 0 0 47 24 36 9 32 58 6 237 -1 48 10 20 46 39 18 48 31 31 46 18 36 - 72 0 0 47 46 35 9 32 57 5 238 0 48 32 13 47 1 24 48 53 21 46 40 45 - 71 0 0 48 8 12 9 32 56 5 239 0 48 53 43 47 23 7 49 14 48 47 2 31 - 70 0 0 48 29 27 9 32 56 4 240 1 49 14 51 47 44 29 49 35 53 47 23 56 - 69 0 0 48 50 20 9 32 55 3 240 2 49 35 37 48 5 28 49 56 35 47 44 58 - 68 0 0 49 10 49 9 32 55 2 241 3 49 55 59 48 26 4 50 16 54 48 5 38 - 67 0 0 49 30 56 9 32 54 2 242 3 50 15 59 48 46 18 50 36 51 .. .. .. - 66 0 0 49 50 40 9 32 54 1 243 4 50 35 35 49 6 10 50 56 24 .. .. .. - 65 0 0 50 10 2 9 32 54 0 243 5 .. .. .. 49 25 38 .. .. .. .. .. .. Data for the target star ------------------------ * name: TYC 6361-00836-1 * constellation : Capricornus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 31 09.4393 DE: -16 31 43.773 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .022, .021 ) * V mag [mag]: 12.3 * B mag [mag]: 13.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (27) Euterpe approx. diameter [km]: 124 approx. diameter ["]: .108 distance from Earth [AU]: 1.58200 * orbital information: orbit source: Preston date of fit: 2007 Jul 28 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1409 number of rejected observations: 249 time covered by the observations: 1903 Aug 31 - 2007 Jul 01 1 sigma uncertainty ellipse (major, minor, PA): 0.014, 0.013, 73° remarks: * orbital elements for (27) Euterpe : Mean anomaly = 240.74108040 deg Arg. of pericenter = 356.83991749 deg Long. of node = 94.80583128 deg Inclination = 1.58377067 deg Eccentricity = 0.17260739 Semimajor axis = 2.34632936 AU Perihelion dist = 1.94133558 AU Mag: H = 6.88, G = 0.15 Epoch of elements : MJD 54317.40400000 TDT (2007 Aug 05.404) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Aug 05 27 Euterpe 9h 40.5m UT 12.3 21 31 9.439-16 31 43.77TYC 6361-00836-1 13.0 10.4 124 10.6 1.582 -2.391 -13.02 224.087 -16.524 36.38 17.02 9.6758 -.18923 .50004 -6.18303 -2.34185 -0.00075 -0.00008 2000 238.7106542007 729.00000356.839917 94.805831 1.5837710.172607392.346329361.941335587.0 5 0.15 RATE 2.7423360 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.026 0.024 85.2 1.230 0.024 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Jul 29, 02:41 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org