IOTA/IOTA-ES occultation update for (782) Montefiore / HIP 16891 event on 2012 Nov 15, 06:00 UT Visible from Venezuela, Colombia, Central America Summary ------- On 2012 Nov 15 UT, the 14 km diameter asteroid (782) Montefiore will occult a 8.3 mag star in the constellation Taurus for observers along a path across Venezuela, Colombia, Central America. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.6 mag to 13.9 mag (the magnitude of the asteroid) for at most 1.4 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: . The event at a glimpse ---------------------- * Rank: 41 * date and approx. time of event: 2012 Nov 15, 05:50 - 2012 Nov 15, 06:10 UT * geocentric midpoint of event [JD]: 2456246.7503125 * magnitude of target star: 8.3 * magnitude drop [mag]: 5.6 * estimated maximum duration [s]: 1.4 * Moon: 3 % sunlit, 163° distance * Sun: 175° distance * rough path description: Venezuela, Colombia, Central America The occultation path -------------------- * approximate projected width [km]: 14 * 1 sigma uncertainty interval [path widths]: +/- 1.58 * 1 sigma uncertainty interval [seconds]: +/- 3.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .040 +/- .026) * 1 sigma uncertainty ellipse (major, minor, PA): ( .041", .025", 77° ) * approx speed of asteroid's shadow [km/s]: 10.3351 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 16891 by 782 Montefiore on 2012 Nov 15 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 -179 0 0 -11 19 55 6 10 39 1 74 -3 -11 15 57 -11 23 54 -11 3 23 -11 36 29 -178 0 0 -11 3 28 6 10 39 2 74 -4 -10 59 29 -11 7 27 -10 46 55 -11 20 2 -177 0 0 -10 46 57 6 10 38 3 74 -5 -10 42 58 -10 50 56 -10 30 23 -11 3 31 -176 0 0 -10 30 21 6 10 38 4 74 -6 -10 26 22 -10 34 20 -10 13 48 -10 46 55 -175 0 0 -10 13 42 6 10 37 5 74 -7 -10 9 44 -10 17 41 - 9 57 9 -10 30 17 -174 0 0 - 9 57 0 6 10 36 6 73 -8 - 9 53 1 -10 0 59 - 9 40 27 -10 13 35 -173 0 0 - 9 40 15 6 10 35 7 73 -9 - 9 36 16 - 9 44 14 - 9 23 42 - 9 56 50 -172 0 0 - 9 23 28 6 10 33 8 73 -10 - 9 19 29 - 9 27 27 - 9 6 54 - 9 40 3 -171 0 0 - 9 6 39 6 10 32 9 73 -12 - 9 2 40 - 9 10 38 - 8 50 4 - 9 23 13 -170 0 0 - 8 49 47 6 10 30 10 73 -13 - 8 45 48 - 8 53 46 - 8 33 13 - 9 6 22 -169 0 0 - 8 32 55 6 10 28 11 73 -14 - 8 28 56 - 8 36 54 - 8 16 20 - 8 49 30 -168 0 0 - 8 16 1 6 10 26 12 73 -15 - 8 12 2 - 8 20 0 - 7 59 27 - 8 32 36 -167 0 0 - 7 59 6 6 10 23 13 72 -16 - 7 55 7 - 8 3 5 - 7 42 32 - 8 15 41 -166 0 0 - 7 42 11 6 10 21 14 72 -17 - 7 38 12 - 7 46 10 - 7 25 37 - 7 58 46 -165 0 0 - 7 25 16 6 10 18 15 72 -18 - 7 21 17 - 7 29 16 - 7 8 42 - 7 41 51 -164 0 0 - 7 8 22 6 10 15 16 72 -19 - 7 4 23 - 7 12 21 - 6 51 48 - 7 24 57 -163 0 0 - 6 51 28 6 10 12 17 72 -20 - 6 47 29 - 6 55 27 - 6 34 54 - 7 8 3 -162 0 0 - 6 34 35 6 10 9 18 72 -21 - 6 30 36 - 6 38 34 - 6 18 1 - 6 51 9 -161 0 0 - 6 17 43 6 10 5 19 72 -22 - 6 13 44 - 6 21 42 - 6 1 10 - 6 34 18 -160 0 0 - 6 0 53 6 10 1 20 71 -23 - 5 56 55 - 6 4 52 - 5 44 20 - 6 17 28 -159 0 0 - 5 44 6 6 9 57 21 71 -24 - 5 40 7 - 5 48 4 - 5 27 32 - 6 0 40 -158 0 0 - 5 27 20 6 9 53 22 71 -25 - 5 23 21 - 5 31 19 - 5 10 47 - 5 43 54 -157 0 0 - 5 10 37 6 9 49 23 71 -26 - 5 6 39 - 5 14 36 - 4 54 4 - 5 27 11 -156 0 0 - 4 53 58 6 9 45 24 71 -27 - 4 49 59 - 4 57 56 - 4 37 25 - 5 10 31 -155 0 0 - 4 37 21 6 9 40 25 71 -28 - 4 33 23 - 4 41 20 - 4 20 49 - 4 53 54 -154 0 0 - 4 20 49 6 9 35 26 71 -29 - 4 16 50 - 4 24 47 - 4 4 17 - 4 37 21 -153 0 0 - 4 4 20 6 9 30 27 71 -30 - 4 0 21 - 4 8 18 - 3 47 48 - 4 20 52 -152 0 0 - 3 47 56 6 9 25 28 71 -31 - 3 43 57 - 3 51 54 - 3 31 24 - 4 4 27 -151 0 0 - 3 31 36 6 9 20 29 70 -32 - 3 27 38 - 3 35 34 - 3 15 5 - 3 48 7 -150 0 0 - 3 15 21 6 9 15 30 70 -33 - 3 11 23 - 3 19 19 - 2 58 51 - 3 31 52 -149 0 0 - 2 59 12 6 9 9 31 70 -34 - 2 55 14 - 3 3 10 - 2 42 42 - 3 15 42 -148 0 0 - 2 43 8 6 9 3 32 70 -35 - 2 39 10 - 2 47 6 - 2 26 38 - 2 59 38 -147 0 0 - 2 27 10 6 8 57 33 70 -36 - 2 23 12 - 2 31 8 - 2 10 40 - 2 43 40 -146 0 0 - 2 11 18 6 8 51 34 70 -37 - 2 7 20 - 2 15 16 - 1 54 49 - 2 27 47 -145 0 0 - 1 55 32 6 8 45 35 70 -38 - 1 51 35 - 1 59 30 - 1 39 4 - 2 12 1 -144 0 0 - 1 39 54 6 8 39 36 70 -39 - 1 35 56 - 1 43 51 - 1 23 26 - 1 56 22 -143 0 0 - 1 24 22 6 8 32 37 70 -40 - 1 20 25 - 1 28 20 - 1 7 55 - 1 40 50 -142 0 0 - 1 8 58 6 8 25 38 70 -41 - 1 5 0 - 1 12 55 - 0 52 31 - 1 25 25 -141 0 0 - 0 53 41 6 8 19 39 70 -42 - 0 49 44 - 0 57 38 - 0 37 15 - 1 10 8 -140 0 0 - 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68 0 0 8 36 54 5 56 50 68 289 -64 8 40 44 8 33 5 8 52 50 8 20 58 - 67 0 0 8 35 39 5 56 40 67 289 -63 8 39 28 8 31 49 8 51 34 8 19 43 - 66 0 0 8 34 7 5 56 31 66 288 -62 8 37 57 8 30 18 8 50 3 8 18 11 - 65 0 0 8 32 20 5 56 21 65 288 -61 8 36 10 8 28 30 8 48 16 8 16 24 - 64 0 0 8 30 17 5 56 12 64 288 -60 8 34 7 8 26 27 8 46 13 8 14 21 - 63 0 0 8 27 59 5 56 3 63 287 -59 8 31 48 8 24 9 8 43 54 8 12 2 - 62 0 0 8 25 24 5 55 54 63 287 -58 8 29 14 8 21 34 8 41 20 8 9 27 - 61 0 0 8 22 34 5 55 44 62 287 -58 8 26 24 8 18 44 8 38 30 8 6 37 - 60 0 0 8 19 27 5 55 35 61 286 -57 8 23 17 8 15 37 8 35 24 8 3 30 - 59 0 0 8 16 6 5 55 26 60 286 -56 8 19 56 8 12 16 8 32 2 8 0 8 - 58 0 0 8 12 28 5 55 17 59 286 -55 8 16 18 8 8 38 8 28 25 7 56 30 - 57 0 0 8 8 35 5 55 9 58 286 -54 8 12 25 8 4 44 8 24 32 7 52 37 - 56 0 0 8 4 26 5 55 0 57 285 -53 8 8 16 8 0 35 8 20 23 7 48 27 - 55 0 0 8 0 1 5 54 51 56 285 -52 8 3 51 7 56 11 8 15 59 7 44 2 - 54 0 0 7 55 21 5 54 43 55 285 -51 7 59 11 7 51 30 8 11 19 7 39 22 - 53 0 0 7 50 25 5 54 34 54 285 -50 7 54 15 7 46 34 8 6 24 7 34 26 - 52 0 0 7 45 14 5 54 26 53 285 -49 7 49 4 7 41 23 8 1 13 7 29 14 - 51 0 0 7 39 47 5 54 17 52 285 -48 7 43 37 7 35 56 7 55 46 7 23 47 - 50 0 0 7 34 4 5 54 9 51 285 -47 7 37 55 7 30 13 7 50 4 7 18 4 - 49 0 0 7 28 6 5 54 1 50 285 -46 7 31 57 7 24 16 7 44 7 7 12 6 - 48 0 0 7 21 53 5 53 53 49 285 -46 7 25 44 7 18 2 7 37 54 7 5 52 - 47 0 0 7 15 25 5 53 45 48 285 -45 7 19 16 7 11 34 7 31 26 6 59 23 - 46 0 0 7 8 41 5 53 37 47 285 -44 7 12 32 7 4 50 7 24 43 6 52 39 - 45 0 0 7 1 42 5 53 30 47 285 -43 7 5 33 6 57 51 7 17 44 6 45 39 - 44 0 0 6 54 28 5 53 22 46 285 -42 6 58 19 6 50 36 7 10 31 6 38 25 - 43 0 0 6 46 59 5 53 15 45 285 -41 6 50 50 6 43 7 7 3 2 6 30 55 - 42 0 0 6 39 15 5 53 7 44 285 -40 6 43 6 6 35 23 6 55 18 6 23 10 - 41 0 0 6 31 16 5 53 0 43 285 -39 6 35 7 6 27 24 6 47 20 6 15 11 - 40 0 0 6 23 2 5 52 53 42 285 -38 6 26 54 6 19 10 6 39 7 6 6 56 - 39 0 0 6 14 33 5 52 46 41 285 -37 6 18 25 6 10 41 6 30 38 5 58 27 - 38 0 0 6 5 49 5 52 39 40 285 -36 6 9 42 6 1 57 6 21 56 5 49 43 - 37 0 0 5 56 51 5 52 32 39 285 -35 6 0 44 5 52 59 6 12 58 5 40 44 - 36 0 0 5 47 39 5 52 26 38 285 -34 5 51 32 5 43 46 6 3 46 5 31 31 - 35 0 0 5 38 12 5 52 19 37 285 -33 5 42 5 5 34 19 5 54 20 5 22 4 - 34 0 0 5 28 31 5 52 13 36 285 -32 5 32 24 5 24 38 5 44 39 5 12 22 - 33 0 0 5 18 36 5 52 7 35 285 -31 5 22 29 5 14 42 5 34 45 5 2 26 - 32 0 0 5 8 26 5 52 1 34 285 -30 5 12 19 5 4 33 5 24 36 4 52 16 - 31 0 0 4 58 3 5 51 55 33 285 -29 5 1 56 4 54 9 5 14 13 4 41 52 - 30 0 0 4 47 26 5 51 49 32 285 -28 4 51 19 4 43 32 5 3 37 4 31 14 - 29 0 0 4 36 35 5 51 44 31 285 -27 4 40 28 4 32 41 4 52 46 4 20 22 - 28 0 0 4 25 30 5 51 38 30 285 -26 4 29 24 4 21 36 4 41 43 4 9 17 - 27 0 0 4 14 12 5 51 33 29 285 -25 4 18 6 4 10 18 4 30 25 3 57 58 - 26 0 0 4 2 41 5 51 28 28 285 -24 4 6 35 3 58 47 4 18 55 3 46 27 - 25 0 0 3 50 57 5 51 23 27 285 -23 3 54 51 3 47 2 4 7 11 3 34 42 - 24 0 0 3 38 59 5 51 18 26 285 -22 3 42 54 3 35 5 3 55 15 3 22 44 - 23 0 0 3 26 49 5 51 13 25 285 -21 3 30 44 3 22 55 3 43 5 3 10 33 - 22 0 0 3 14 27 5 51 9 24 285 -20 3 18 21 3 10 32 3 30 43 2 58 9 - 21 0 0 3 1 51 5 51 4 23 285 -19 3 5 46 2 57 56 3 18 9 2 45 34 - 20 0 0 2 49 4 5 51 0 22 285 -18 2 52 59 2 45 9 3 5 22 2 32 45 - 19 0 0 2 36 4 5 50 56 21 285 -17 2 40 0 2 32 9 2 52 23 2 19 45 - 18 0 0 2 22 53 5 50 52 20 285 -16 2 26 48 2 18 57 2 39 12 2 6 33 - 17 0 0 2 9 29 5 50 49 19 285 -15 2 13 25 2 5 34 2 25 50 1 53 9 - 16 0 0 1 55 55 5 50 45 18 285 -14 1 59 51 1 51 59 2 12 15 1 39 33 - 15 0 0 1 42 9 5 50 42 17 285 -13 1 46 5 1 38 13 1 58 30 1 25 47 - 14 0 0 1 28 11 5 50 39 16 285 -12 1 32 8 1 24 15 1 44 34 1 11 49 - 13 0 0 1 14 3 5 50 36 15 285 -11 1 18 0 1 10 7 1 30 26 0 57 40 - 12 0 0 0 59 45 5 50 33 14 285 -10 1 3 41 0 55 48 1 16 8 0 43 21 - 11 0 0 0 45 16 5 50 30 13 285 -9 0 49 12 0 41 19 1 1 40 0 28 51 - 10 0 0 0 30 36 5 50 28 12 285 -8 0 34 33 0 26 40 0 47 1 0 14 11 - 9 0 0 0 15 47 5 50 26 11 285 -7 0 19 44 0 11 50 0 32 13 - 0 0 39 - 8 0 0 0 0 48 5 50 24 10 285 -6 0 4 45 - 0 3 9 0 17 14 - 0 15 38 - 7 0 0 - 0 14 20 5 50 22 9 285 -5 - 0 10 23 - 0 18 17 0 2 7 - 0 30 47 - 6 0 0 - 0 29 37 5 50 21 8 285 -4 - 0 25 40 - 0 33 35 - 0 13 10 - 0 46 5 - 5 0 0 - 0 45 3 5 50 19 7 285 -3 - 0 41 6 - 0 49 1 - 0 28 36 - 1 1 32 - 4 0 0 - 1 0 38 5 50 18 6 285 -2 - 0 56 41 - 1 4 36 - 0 44 10 - 1 17 7 - 3 0 0 - 1 16 21 5 50 17 5 285 -1 - 1 12 24 - 1 20 19 - 0 59 52 - 1 32 51 - 2 0 0 - 1 32 12 5 50 16 4 285 0 - 1 28 15 - 1 36 10 - 1 15 43 - 1 48 43 Uncertainty in time = +/- 3 secs Prediction of 2012 Oct 26.0 Data for the target star ------------------------ * name: HIP 16891 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 03 37 20.6654 DE: +15 05 42.683 * position source: mpos:HIP2 pm:HIP2 plx:HIP2 * standard error: RA,DE ["]: ( .021, .017 ) * V mag [mag]: 8.3 * B mag [mag]: 8.8 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (782) Montefiore approx. diameter [km]: 14 approx. diameter ["]: .016 distance from Earth [AU]: 1.21500 * orbital information: orbit source: Preston date of fit: 2012 Oct 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1071 number of rejected observations: 59 time covered by the observations: 1915 Sep 13 - 2012 Oct 07 1 sigma uncertainty ellipse (major, minor, PA): 0.035, 0.018, 72° remarks: * orbital elements for (782) Montefiore : Mean anomaly = 257.24845810 deg Arg. of pericenter = 80.96400901 deg Long. of node = 80.50646448 deg Inclination = 5.26098910 deg Eccentricity = 0.03905240 Semimajor axis = 2.18039736 AU Perihelion dist = 2.09524762 AU Mag: H = 11.24, G = 0.15 Epoch of elements : MJD 56246.25000000 TDT (2012 Nov 15.250) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 15 782 Montefiore 6h 0.4m UT 8.3 3 37 20.665 15 5 42.68HIP 16891 8.8 13.9 14 1.4 1.215 -2.905 -3.42 -90.5074 15.096 86.05 -18.59 6.0075 0.01019 -0.12530 -5.81422 -0.47313 -0.00033 0.00034 2000 255.335169201211 9.00000 80.964009 80.506464 5.2609890.03905240 2.1803974 2.095247611.5 5.00.15 RATE 3.0612630 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.041 0.025 77 2.58 0.025 0 0 4 3 056226.0020121115__16891 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 22:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org