IOTA/IOTA-ES occultation update for (107) Camilla / TYC 0737-01186-1 event on 2012 Nov 17, 18:49 UT Visible from Philippines, SE Asia Summary ------- On 2012 Nov 17 UT, the 267 km diameter asteroid (107) Camilla will occult a 10.9 mag star in the constellation Monoceros for observers along a path across Philippines, SE Asia. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.8 mag to 12.5 mag (the magnitude of the asteroid) for at most 38.7 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, 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: 2012 Nov 17, 18:37 - 2012 Nov 17, 19:05 UT * geocentric midpoint of event [JD]: 2456249.28498333 * magnitude of target star: 10.9 * magnitude drop [mag]: 1.8 * estimated maximum duration [s]: 38.7 * Moon: 21 % sunlit, 165° distance * Sun: 136° distance * rough path description: Philippines, SE Asia The occultation path -------------------- * approximate projected width [km]: 267 * 1 sigma uncertainty interval [path widths]: +/- 0.21 * 1 sigma uncertainty interval [seconds]: +/- 7.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .031) * 1 sigma uncertainty ellipse (major, minor, PA): ( .031", .030", 0° ) * approx speed of asteroid's shadow [km/s]: 6.9070 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0737-01186-1 by 107 Camilla on 2012 Nov 17 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 30 0 0 -26 6 5 19 5 43 1 79 -31 -24 52 16 -27 19 52 -24 21 15 -27 50 51 31 0 0 -25 54 51 19 5 43 1 78 -31 -24 40 55 -27 8 45 -24 9 50 -27 39 47 32 0 0 -25 43 8 19 5 42 2 78 -32 -24 29 4 -26 57 10 -23 57 57 -27 28 15 33 0 0 -25 30 58 19 5 41 3 77 -33 -24 16 46 -26 45 7 -23 45 35 -27 16 16 34 0 0 -25 18 20 19 5 40 4 77 -34 -24 4 0 -26 32 37 -23 32 46 -27 3 49 35 0 0 -25 5 13 19 5 39 5 76 -34 -23 50 46 -26 19 39 -23 19 28 -26 50 54 36 0 0 -24 51 40 19 5 38 6 76 -35 -23 37 3 -26 6 14 -23 5 42 -26 37 33 37 0 0 -24 37 38 19 5 36 7 76 -36 -23 22 53 -25 52 21 -22 51 28 -26 23 43 38 0 0 -24 23 9 19 5 34 8 75 -37 -23 8 15 -25 38 0 -22 36 47 -26 9 27 39 0 0 -24 8 12 19 5 32 9 75 -37 -22 53 9 -25 23 13 -22 21 37 -25 54 43 40 0 0 -23 52 48 19 5 29 10 74 -38 -22 37 36 -25 7 58 -22 6 0 -25 39 32 41 0 0 -23 36 56 19 5 27 11 74 -39 -22 21 35 -24 52 15 -21 49 55 -25 23 53 42 0 0 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0 51 40 2 27 26 - 1 26 12 97 0 0 1 3 2 18 56 1 68 65 -60 2 25 19 - 0 19 13 2 59 54 - 0 53 45 98 0 0 1 35 29 18 55 45 69 65 -59 2 57 47 0 13 15 3 32 22 - 0 21 18 99 0 0 2 7 56 18 55 28 70 65 -59 3 30 14 0 45 42 4 4 49 0 11 10 100 0 0 2 40 22 18 55 12 72 66 -58 4 2 39 1 18 8 4 37 14 0 43 36 101 0 0 3 12 45 18 54 56 73 66 -58 4 35 1 1 50 33 5 9 36 1 16 1 102 0 0 3 45 6 18 54 39 74 66 -57 5 7 21 2 22 54 5 41 55 1 48 23 103 0 0 4 17 22 18 54 22 75 67 -57 5 39 36 2 55 12 6 14 9 2 20 42 104 0 0 4 49 34 18 54 6 76 68 -56 6 11 46 3 27 26 6 46 19 2 52 57 105 0 0 5 21 41 18 53 49 77 68 -56 6 43 50 3 59 35 7 18 22 3 25 7 106 0 0 5 53 42 18 53 32 78 69 -55 7 15 48 4 31 39 7 50 19 3 57 12 107 0 0 6 25 35 18 53 15 79 70 -55 7 47 39 5 3 36 8 22 9 4 29 10 108 0 0 6 57 22 18 52 58 80 71 -54 8 19 22 5 35 25 8 53 50 5 1 1 109 0 0 7 28 59 18 52 42 81 72 -53 8 50 56 6 7 7 9 25 23 5 32 44 110 0 0 8 0 28 18 52 25 82 74 -53 9 22 21 6 38 40 9 56 46 6 4 19 111 0 0 8 31 48 18 52 8 83 76 -52 9 53 36 7 10 3 10 28 0 6 35 44 112 0 0 9 2 57 18 51 51 84 79 -51 10 24 41 7 41 17 10 59 2 7 6 59 113 0 0 9 33 54 18 51 34 85 83 -51 10 55 34 8 12 19 11 29 53 7 38 4 114 0 0 10 4 40 18 51 17 86 89 -50 11 26 15 8 43 11 12 0 32 8 8 58 115 0 0 10 35 14 18 51 0 87 98 -49 11 56 43 9 13 50 12 30 58 8 39 39 116 0 0 11 5 35 18 50 44 87 114 -48 12 26 58 9 44 17 13 1 11 9 10 8 117 0 0 11 35 42 18 50 27 88 140 -48 12 56 59 10 14 30 13 31 10 9 40 24 118 0 0 12 5 35 18 50 10 88 171 -47 13 26 46 10 44 29 14 0 54 10 10 26 119 0 0 12 35 13 18 49 54 87 194 -46 13 56 18 11 14 14 14 30 23 10 40 13 120 0 0 13 4 36 18 49 37 87 207 -45 14 25 34 11 43 43 14 59 36 11 9 46 121 0 0 13 33 43 18 49 20 86 216 -45 14 54 34 12 12 57 15 28 33 11 39 3 122 0 0 14 2 34 18 49 4 85 221 -44 15 23 17 12 41 55 15 57 13 12 8 4 123 0 0 14 31 7 18 48 48 84 225 -43 15 51 43 13 10 36 16 25 36 12 36 48 124 0 0 14 59 24 18 48 31 83 227 -42 16 19 52 13 39 0 16 53 42 13 5 15 125 0 0 15 27 22 18 48 15 82 230 -42 16 47 42 14 7 6 17 21 29 13 33 25 126 0 0 15 55 2 18 47 59 81 231 -41 17 15 14 14 34 54 17 48 57 14 1 16 127 0 0 16 22 23 18 47 43 80 233 -40 17 42 27 15 2 23 18 16 7 14 28 49 128 0 0 16 49 25 18 47 27 79 234 -39 18 9 20 15 29 34 18 42 57 14 56 2 129 0 0 17 16 7 18 47 12 78 235 -38 18 35 54 15 56 24 19 9 27 15 22 57 130 0 0 17 42 29 18 46 56 77 236 -38 19 2 7 16 22 55 19 35 37 15 49 31 131 0 0 18 8 31 18 46 40 76 237 -37 19 28 0 16 49 6 20 1 26 16 15 46 132 0 0 18 34 12 18 46 25 75 238 -36 19 53 32 17 14 56 20 26 54 16 41 39 133 0 0 18 59 31 18 46 10 74 238 -35 20 18 43 17 40 25 20 52 1 17 7 12 134 0 0 19 24 30 18 45 55 73 239 -34 20 43 32 18 5 32 21 16 46 17 32 23 135 0 0 19 49 6 18 45 40 72 240 -34 21 8 0 18 30 18 21 41 10 17 57 13 136 0 0 20 13 21 18 45 25 71 240 -33 21 32 5 18 54 42 22 5 11 18 21 41 137 0 0 20 37 13 18 45 10 70 241 -32 21 55 48 19 18 44 22 28 50 18 45 47 138 0 0 21 0 43 18 44 56 69 241 -31 22 19 8 19 42 23 22 52 6 19 9 30 139 0 0 21 23 50 18 44 41 68 242 -30 22 42 5 20 5 40 23 14 59 19 32 51 140 0 0 21 46 34 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18 41 25 54 249 -19 27 38 44 25 7 6 28 10 38 24 35 17 155 0 0 26 39 33 18 41 14 54 250 -18 27 55 15 25 23 55 28 27 4 24 52 9 156 0 0 26 55 47 18 41 2 53 250 -17 28 11 20 25 40 18 28 43 6 25 8 37 157 0 0 27 11 36 18 40 51 52 251 -16 28 27 1 25 56 16 28 58 43 25 24 39 158 0 0 27 27 1 18 40 40 51 251 -16 28 42 16 26 11 49 29 13 55 25 40 15 159 0 0 27 42 0 18 40 29 50 252 -15 28 57 7 26 26 57 29 28 42 25 55 27 160 0 0 27 56 34 18 40 18 49 252 -14 29 11 32 26 41 39 29 43 3 26 10 13 161 0 0 28 10 43 18 40 7 48 253 -13 29 25 33 26 55 56 29 57 0 26 24 33 162 0 0 28 24 26 18 39 57 47 253 -13 29 39 8 27 9 48 30 10 32 26 38 28 163 0 0 28 37 44 18 39 47 46 254 -12 29 52 18 27 23 14 30 23 39 26 51 58 164 0 0 28 50 37 18 39 36 46 254 -11 30 5 3 27 36 15 30 36 21 27 5 2 165 0 0 29 3 5 18 39 27 45 255 -10 30 17 23 27 48 50 30 48 37 27 17 40 166 0 0 29 15 7 18 39 17 44 255 -10 30 29 18 28 1 0 31 0 29 27 29 53 167 0 0 29 26 44 18 39 7 43 256 -9 30 40 48 28 12 44 31 11 56 27 41 40 168 0 0 29 37 56 18 38 58 42 256 -8 30 51 52 28 24 3 31 22 57 27 53 2 169 0 0 29 48 42 18 38 49 41 257 -7 31 2 32 28 34 57 31 33 34 28 3 58 170 0 0 29 59 4 18 38 40 40 257 -7 31 12 46 28 45 24 31 43 46 28 14 29 171 0 0 30 9 0 18 38 31 40 258 -6 31 22 36 28 55 27 31 53 32 28 24 34 172 0 0 30 18 30 18 38 22 39 258 -5 31 32 0 29 5 4 32 2 54 28 34 13 173 0 0 30 27 36 18 38 14 38 259 -4 31 41 0 29 14 15 32 11 51 28 43 27 174 0 0 30 36 16 18 38 6 37 259 -4 31 49 34 29 23 1 32 20 23 28 52 15 175 0 0 30 44 30 18 37 57 36 260 -3 31 57 43 29 31 21 32 28 29 29 0 38 176 0 0 30 52 20 18 37 50 35 260 -2 32 5 27 29 39 16 32 36 11 29 8 35 177 0 0 30 59 44 18 37 42 35 261 -1 32 12 46 29 46 45 32 43 28 29 16 6 178 0 0 31 6 43 18 37 34 34 261 -1 32 19 40 29 53 48 32 50 20 29 23 12 179 0 0 31 13 17 18 37 27 33 262 0 32 26 10 30 0 27 32 56 48 29 29 52 Uncertainty in time = +/- 8 secs Prediction of 2012 Oct 26.0 Data for the target star ------------------------ * name: TYC 0737-01186-1 * constellation : Monoceros * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 31 36.7390 DE: +10 04 18.916 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .026, .030 ) * V mag [mag]: 10.9 * B mag [mag]: 11.2 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (107) Camilla approx. diameter [km]: 267 approx. diameter ["]: .147 distance from Earth [AU]: 2.50500 * orbital information: orbit source: Preston date of fit: 2012 Oct 25 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1205 number of rejected observations: 161 time covered by the observations: 1916 Apr 27 - 2012 Oct 19 1 sigma uncertainty ellipse (major, minor, PA): 0.015, 0.009, 90° remarks: * orbital elements for (107) Camilla : Mean anomaly = 330.98813108 deg Arg. of pericenter = 306.51787564 deg Long. of node = 172.71472122 deg Inclination = 9.99461187 deg Eccentricity = 0.06894587 Semimajor axis = 3.49523297 AU Perihelion dist = 3.25425109 AU Mag: H = 7.08, G = 0.08 Epoch of elements : MJD 56248.78500000 TDT (2012 Nov 17.785) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 17 107 Camilla 18h 50.4m UT 10.9 6 31 36.739 10 4 18.92TYC 0737-01186-1 11.2 12.5 267 38.7 2.505 -0.816 -6.50 118.0792 10.074 -106.31 -19.21 18.8396 -0.01719 0.02772 -3.43012 -1.85274 -0.00397 0.00124 2000 329.663083201211 9.00000306.517876172.714721 9.9946120.06894587 3.4952330 3.2542511 7.1 5.00.08 RATE 1.5083070 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.031 0.030 0 1.21 0.031 1 9 1235 0 0-4 056226.0020121117_1186-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 22:32 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org