IOTA/IOTA-ES occultation update for (107) Camilla / TYC 0727-00593-1 event on 2012 Aug 23, 13:48 UT Visible from Alaska Summary ------- On 2012 Aug 23 UT, the 267 km diameter asteroid (107) Camilla will occult a 11.7 mag star in the constellation Taurus for observers along a path across Alaska. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.9 mag to 13.4 mag (the magnitude of the asteroid) for at most 9.1 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: 2012 Aug 23, 13:44 - 2012 Aug 23, 13:46 UT * geocentric midpoint of event [JD]: 2456163.07477917 * magnitude of target star: 11.7 * magnitude drop [mag]: 1.9 * estimated maximum duration [s]: 9.1 * Moon: 39 % sunlit, 140° distance * Sun: 64° distance * rough path description: Alaska The occultation path -------------------- * approximate projected width [km]: 345 * 1 sigma uncertainty interval [path widths]: +/- 0.32 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .027 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .027", 360° ) * approx speed of asteroid's shadow [km/s]: 29.4940 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0727-00593-1 by 107 Camilla on 2012 Aug 23 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 165 0 0 44 21 33 13 44 55 0 70 -34 .. .. .. 46 2 44 .. .. .. 47 8 56 166 0 0 44 37 30 13 44 55 1 71 -33 42 58 54 46 18 37 41 57 0 47 24 48 167 0 0 44 53 19 13 44 55 2 71 -33 43 14 46 46 34 22 42 12 53 47 40 31 168 0 0 45 8 59 13 44 55 3 72 -32 43 30 29 46 49 59 42 28 39 47 56 5 169 0 0 45 24 30 13 44 55 3 73 -32 43 46 4 47 5 27 42 44 17 48 11 30 170 0 0 45 39 53 13 44 55 4 73 -32 44 1 31 47 20 45 42 59 45 48 26 45 171 0 0 45 55 6 13 44 56 5 74 -31 44 16 48 47 35 54 43 15 5 48 41 51 172 0 0 46 10 10 13 44 56 6 75 -31 44 31 57 47 50 53 43 30 16 48 56 47 173 0 0 46 25 5 13 44 56 6 76 -30 44 46 56 48 5 43 43 45 18 49 11 34 174 0 0 46 39 49 13 44 57 7 76 -30 45 1 45 48 20 22 44 0 10 49 26 10 175 0 0 46 54 24 13 44 57 8 77 -29 45 16 24 48 34 52 44 14 52 49 40 35 176 0 0 47 8 48 13 44 58 8 78 -29 45 30 53 48 49 10 44 29 25 49 54 50 177 0 0 47 23 2 13 44 58 9 79 -28 45 45 12 49 3 18 44 43 47 50 8 54 178 0 0 47 37 5 13 44 59 10 79 -28 45 59 21 49 17 15 44 57 58 50 22 47 179 0 0 47 50 57 13 44 59 11 80 -27 46 13 19 49 31 2 45 11 59 50 36 29 180 0 0 48 4 38 13 45 0 11 81 -27 46 27 5 49 44 36 45 25 50 50 50 0 -179 0 0 48 18 8 13 45 1 12 82 -26 46 40 41 49 58 0 45 39 29 51 3 19 -178 0 0 48 31 26 13 45 2 13 82 -26 46 54 6 50 11 12 45 52 58 51 16 27 -177 0 0 48 44 34 13 45 2 13 83 -25 47 7 19 50 24 13 46 6 15 51 29 23 -176 0 0 48 57 29 13 45 3 14 84 -25 47 20 21 50 37 2 46 19 20 51 42 7 -175 0 0 49 10 13 13 45 4 15 85 -24 47 33 11 50 49 38 46 32 14 51 54 40 -174 0 0 49 22 45 13 45 5 15 86 -23 47 45 50 51 2 3 46 44 56 52 7 0 -173 0 0 49 35 5 13 45 6 16 86 -23 47 58 16 51 14 16 46 57 27 52 19 8 -172 0 0 49 47 12 13 45 7 17 87 -22 48 10 30 51 26 17 47 9 45 52 31 3 -171 0 0 49 59 8 13 45 8 17 88 -22 48 22 33 51 38 5 47 21 52 52 42 47 -170 0 0 50 10 51 13 45 9 18 89 -21 48 34 23 51 49 41 47 33 46 52 54 18 -169 0 0 50 22 22 13 45 10 19 90 -21 48 46 1 52 1 5 47 45 28 53 5 36 -168 0 0 50 33 41 13 45 11 19 91 -20 48 57 26 52 12 16 47 56 57 53 16 42 -167 0 0 50 44 47 13 45 12 20 91 -20 49 8 39 52 23 14 48 8 14 53 27 36 -166 0 0 50 55 40 13 45 13 21 92 -19 49 19 39 52 34 0 48 19 19 53 38 16 -165 0 0 51 6 20 13 45 14 21 93 -19 49 30 27 52 44 33 48 30 11 53 48 44 -164 0 0 51 16 48 13 45 15 22 94 -18 49 41 1 52 54 53 48 40 50 53 59 0 -163 0 0 51 27 3 13 45 17 22 95 -17 49 51 24 53 5 1 48 51 16 54 9 2 -162 0 0 51 37 5 13 45 18 23 96 -17 50 1 33 53 14 56 49 1 30 54 18 51 -161 0 0 51 46 55 13 45 19 24 97 -16 50 11 29 53 24 37 49 11 30 54 28 28 -160 0 0 51 56 31 13 45 20 24 97 -16 50 21 12 53 34 6 49 21 18 54 37 52 -159 0 0 52 5 55 13 45 22 25 98 -15 50 30 43 53 43 22 49 30 52 54 47 3 -158 0 0 52 15 5 13 45 23 25 99 -15 50 40 0 53 52 25 49 40 14 54 56 1 -157 0 0 52 24 2 13 45 24 26 100 -14 50 49 4 54 1 15 49 49 22 55 4 46 -156 0 0 52 32 47 13 45 26 27 101 -13 50 57 55 54 9 52 49 58 17 55 13 18 -155 0 0 52 41 18 13 45 27 27 102 -13 51 6 33 54 18 16 50 6 59 55 21 37 -154 0 0 52 49 36 13 45 28 28 103 -12 51 14 58 54 26 27 50 15 28 55 29 43 -153 0 0 52 57 41 13 45 30 28 104 -12 51 23 10 54 34 25 50 23 44 55 37 36 -152 0 0 53 5 33 13 45 31 29 105 -11 51 31 8 54 42 10 50 31 46 55 45 17 -151 0 0 53 13 12 13 45 33 29 106 -11 51 38 54 54 49 42 50 39 36 55 52 44 -150 0 0 53 20 38 13 45 34 30 107 -10 51 46 26 54 57 1 50 47 11 55 59 58 -149 0 0 53 27 50 13 45 36 30 108 -10 51 53 44 55 4 7 50 54 34 56 7 0 -148 0 0 53 34 50 13 45 37 31 109 -9 52 0 50 55 11 0 51 1 43 56 13 48 -147 0 0 53 41 36 13 45 39 32 110 -8 52 7 42 55 17 40 51 8 39 56 20 24 -146 0 0 53 48 9 13 45 40 32 111 -8 52 14 21 55 24 7 51 15 22 56 26 47 -145 0 0 53 54 29 13 45 42 33 112 -7 52 20 47 55 30 21 51 21 51 56 32 56 -144 0 0 54 0 36 13 45 44 33 113 -7 52 26 59 55 36 22 51 28 7 56 38 53 -143 0 0 54 6 30 13 45 45 34 114 -6 52 32 59 55 42 10 51 34 9 56 44 37 -142 0 0 54 12 10 13 45 47 34 115 -6 52 38 45 55 47 45 51 39 59 56 50 9 -141 0 0 54 17 38 13 45 48 35 116 -5 52 44 17 55 53 7 51 45 34 56 55 27 -140 0 0 54 22 53 13 45 50 35 117 -4 52 49 37 55 58 16 51 50 57 57 0 33 -139 0 0 54 27 54 13 45 52 36 118 -4 52 54 43 56 3 12 51 56 6 57 5 25 -138 0 0 54 32 42 13 45 54 36 119 -3 52 59 36 56 7 56 52 1 2 57 10 6 -137 0 0 54 37 18 13 45 55 36 120 -3 53 4 16 56 12 26 52 5 44 57 14 33 -136 0 0 54 41 40 13 45 57 37 121 -2 53 8 42 56 16 44 52 10 14 57 18 47 -135 0 0 54 45 49 13 45 59 37 122 -2 53 12 56 56 20 49 52 14 29 57 22 49 -134 0 0 54 49 45 13 46 0 38 123 -1 53 16 56 56 24 41 52 18 32 57 26 38 -133 0 0 54 53 29 13 46 2 38 125 0 53 20 43 56 28 20 52 22 21 57 30 15 Uncertainty in time = +/- 3 secs Prediction of 2012 Jul 8.0 Data for the target star ------------------------ * name: TYC 0727-00593-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 49 24.4117 DE: +14 29 22.026 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .024, .031 ) * V mag [mag]: 11.7 * B mag [mag]: 12.0 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (107) Camilla approx. diameter [km]: 267 approx. diameter ["]: .101 distance from Earth [AU]: 3.64900 * orbital information: orbit source: Preston date of fit: 2012 Jul 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1192 number of rejected observations: 161 time covered by the observations: 1916 Apr 27 - 2012 Jan 14 1 sigma uncertainty ellipse (major, minor, PA): 0.011, 0.006, 88° remarks: * orbital elements for (107) Camilla : Mean anomaly = 318.13139879 deg Arg. of pericenter = 306.35026366 deg Long. of node = 172.78215266 deg Inclination = 9.99551388 deg Eccentricity = 0.06965985 Semimajor axis = 3.49764099 AU Perihelion dist = 3.25399582 AU Mag: H = 7.08, G = 0.08 Epoch of elements : MJD 56162.57500000 TDT (2012 Aug 23.575) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Aug 23 107 Camilla 13h 47.7m UT 11.7 5 49 24.412 14 29 22.03TYC 0727-00593-1 12.0 13.4 267 9.1 3.649 2.744 -4.63 -91.8273 14.491 -26.29 11.18 13.7947 0.06953 0.62826 16.53618 -1.91985 -0.00513 -0.00049 2000 317.7434112012 821.00000306.350264172.782153 9.9955140.06965985 3.4976410 3.2539958 7.1 5.00.08 RATE 1.5067500 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.027 360 1.32 0.032 1 9 1235 0-3-4 056116.0020120823_0593-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Jul 07, 23:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org