IOTA/IOTA-ES occultation update for (1315) Bronislawa / TYC 1321-00636-1 event on 2009 Nov 05, 16:45 UT Visible from Summary ------- On 2009 Nov 05 UT, the 61 km diameter asteroid (1315) Bronislawa will occult a 11.5 mag star in the constellation Orion for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.9 mag to 15.4 mag (the magnitude of the asteroid) for at most 9.3 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: 69 * date and approx. time of event: 2009 Nov 05, 16:49 - 2009 Nov 05, 16:59 UT * magnitude of target star: 11.5 * magnitude drop [mag]: 3.9 * estimated maximum duration [s]: 9.3 * Moon: 89 % sunlit, 11° distance * Sun: 133° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 113 * 1 sigma uncertainty interval [path widths]: +/- 0.86 * 1 sigma uncertainty interval [seconds]: +/- 8.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .033 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .033", .024", 94° ) * approx speed of asteroid's shadow [km/s]: 6.5151 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1321-00636-1 by 1315 Bronislawa on 2009 Nov 5 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 ' " Longitude Longitude Longitude Longitude 132 0 25 -68 0 0 16 59 22 1 17 -3 130 32 55 133 28 38 ... .. .. 136 2 13 132 54 45 -67 0 0 16 59 21 2 17 -4 131 30 20 134 19 51 ... .. .. 136 48 2 133 49 31 -66 0 0 16 59 20 3 16 -5 132 27 54 135 11 48 ... .. .. 137 35 5 134 44 46 -65 0 0 16 59 17 4 15 -5 133 25 42 136 4 29 ... .. .. 138 23 21 135 40 32 -64 0 0 16 59 15 5 14 -6 134 23 47 136 57 57 132 13 9 139 12 49 136 36 54 -63 0 0 16 59 11 6 13 -7 135 22 14 137 52 13 133 15 12 140 3 26 137 33 54 -62 0 0 16 59 7 7 12 -7 136 21 8 138 47 18 134 17 22 140 55 13 138 31 34 -61 0 0 16 59 3 8 11 -8 137 20 32 139 43 14 135 19 45 141 48 9 139 29 58 -60 0 0 16 58 57 10 11 -8 138 20 31 140 40 4 136 22 26 142 42 15 140 29 9 -59 0 0 16 58 51 11 10 -9 139 21 7 141 37 49 137 25 30 143 37 33 141 29 10 -58 0 0 16 58 44 12 9 -9 140 22 26 142 36 32 138 29 2 144 34 3 142 30 4 -57 0 0 16 58 37 13 8 -10 141 24 30 143 36 16 139 33 7 145 31 47 143 31 54 -56 0 0 16 58 29 14 7 -10 142 27 23 144 37 4 140 37 50 146 30 47 144 34 45 -55 0 0 16 58 20 15 6 -10 143 31 10 145 38 58 141 43 15 147 31 6 145 38 39 -54 0 0 16 58 10 16 5 -11 144 35 55 146 42 3 142 49 27 148 32 47 146 43 42 -53 0 0 16 57 59 17 4 -11 145 41 42 147 46 23 143 56 31 149 35 53 147 49 57 -52 0 0 16 57 48 18 3 -11 146 48 35 148 52 0 145 4 31 150 40 28 148 57 29 -51 0 0 16 57 36 19 2 -11 147 56 39 149 59 1 146 13 34 151 46 37 150 6 23 -50 0 0 16 57 23 20 1 -12 149 6 0 151 7 29 147 23 43 152 54 24 151 16 44 -49 0 0 16 57 10 21 360 -12 150 16 43 152 17 31 148 35 5 154 3 54 152 28 40 -48 0 0 16 56 55 22 359 -12 151 28 54 153 29 12 149 47 45 155 15 15 153 42 16 -47 0 0 16 56 40 23 357 -12 152 42 39 154 42 39 151 1 51 156 28 32 154 57 39 -46 0 0 16 56 23 24 356 -12 153 58 6 155 58 1 152 17 29 157 43 55 156 14 58 -45 0 0 16 56 6 25 355 -12 155 15 23 157 15 24 153 34 47 159 1 32 157 34 22 -44 0 0 16 55 48 26 354 -12 156 34 39 158 35 0 154 53 52 160 21 33 158 56 2 -43 0 0 16 55 29 27 352 -12 157 56 3 159 56 58 156 14 56 161 44 11 160 20 9 -42 0 0 16 55 9 27 351 -11 159 19 47 161 21 32 157 38 7 163 9 39 161 46 57 -41 0 0 16 54 48 28 349 -11 160 46 3 162 48 55 159 3 38 164 38 14 163 16 41 -40 0 0 16 54 26 29 348 -11 162 15 7 164 19 24 160 31 41 166 10 14 164 49 40 -39 0 0 16 54 2 30 346 -10 163 47 14 165 53 19 162 2 32 167 46 1 166 26 14 -38 0 0 16 53 38 30 344 -10 165 22 46 167 31 4 163 36 29 169 26 4 168 6 51 -37 0 0 16 53 12 31 342 -9 167 2 5 169 13 6 165 13 53 171 10 55 169 52 0 -36 0 0 16 52 45 32 340 -8 168 45 41 170 59 59 166 55 7 173 1 16 171 42 21 -35 0 0 16 52 16 32 338 -7 170 34 7 172 52 27 168 40 41 174 58 0 173 38 42 -34 0 0 16 51 46 32 336 -6 172 28 8 174 51 25 170 31 13 177 2 16 175 42 5 -33 0 0 16 51 14 33 334 -5 174 28 38 176 58 4 172 27 26 179 15 37 Latitude Latitude Latitude Latitude 176 0 0 -32 51 36 16 51 9 33 334 -5 -32 16 50 -33 27 1 -31 18 25 -34 29 34 177 0 0 -32 24 2 16 50 54 33 333 -5 -31 49 34 -32 59 7 -30 51 40 -34 1 4 178 0 0 -31 57 20 16 50 38 33 331 -4 -31 23 10 -32 32 6 -30 25 44 -33 33 28 179 0 0 -31 31 30 16 50 23 33 330 -3 -30 57 37 -32 5 59 -30 0 38 -33 6 48 180 0 0 -31 6 33 16 50 7 33 329 -3 -30 32 56 -31 40 45 -29 36 22 -32 41 2 -179 0 0 -30 42 27 16 49 52 33 328 -2 -30 9 5 -31 16 23 -29 12 56 -32 16 11 -178 0 0 -30 19 13 16 49 37 32 327 -2 -29 46 6 -30 52 54 -28 50 20 -31 52 13 -177 0 0 -29 56 51 16 49 22 32 326 -1 -29 23 57 -30 30 17 -28 28 34 -31 29 10 -176 0 0 -29 35 20 16 49 7 32 325 0 -29 2 39 -30 8 33 -28 7 37 -31 7 0 Uncertainty in time = +/- 10 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 1321-00636-1 * constellation : Orion * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 00 56.4926 DE: +20 06 49.843 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .017, .018 ) * V mag [mag]: 11.5 * B mag [mag]: 11.9 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1315) Bronislawa approx. diameter [km]: 61 approx. diameter ["]: .031 distance from Earth [AU]: 2.70500 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 770 number of rejected observations: 58 time covered by the observations: 1905 Nov 20 - 2007 Nov 20 1 sigma uncertainty ellipse (major, minor, PA): 0.028, 0.017, 96° remarks: * orbital elements for (1315) Bronislawa : Mean anomaly = 176.73088740 deg Arg. of pericenter = 24.43846692 deg Long. of node = 236.62660854 deg Inclination = 7.07165346 deg Eccentricity = 0.07870715 Semimajor axis = 3.20517528 AU Perihelion dist = 2.95290508 AU Mag: H = 9.92, G = 0.15 Epoch of elements : MJD 55140.69800000 TDT (2009 Nov 05.698) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Nov 5 1315 Bronislawa 16h 50.6m UT 11.5 6 0 56.493 20 6 49.84TYC 1321-00636-1 11.9 15.4 61 9.3 2.705 -0.766 -5.18 152.5335 20.115 -76.74 -15.86 16.8434 0.36482 -0.75734 -3.31449 -1.59271 -0.00437 0.00024 2000 176.610997200911 5.00000 24.438467236.626609 7.0716530.07870715 3.2051753 2.9529051 9.8 5.00.15 RATE 1.7176180 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.033 0.024 94 1.86 0.027 0 54545.5020091105_0636-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 16:09 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org