IOTA/IOTA-ES occultation update for (1203) Nanna / TYC 5776-00281-1 event on 2009 Nov 01, 07:27 UT Visible from Summary ------- On 2009 Nov 01 UT, the 35 km diameter asteroid (1203) Nanna will occult a 11.9 mag star in the constellation Aquarius 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 15.8 mag (the magnitude of the asteroid) for at most 2.6 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: 37 * date and approx. time of event: 2009 Nov 01, 07:27 - 2009 Nov 01, 07:34 UT * magnitude of target star: 11.9 * magnitude drop [mag]: 3.9 * estimated maximum duration [s]: 2.6 * Moon: 97 % sunlit, 63° distance * Sun: 99° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 41 * 1 sigma uncertainty interval [path widths]: +/- 1.81 * 1 sigma uncertainty interval [seconds]: +/- 6.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .061 +/- .044) * 1 sigma uncertainty ellipse (major, minor, PA): ( .062", .043", 78° ) * approx speed of asteroid's shadow [km/s]: 13.4538 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5776-00281-1 by 1203 Nanna on 2009 Nov 1 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 168 0 0 -41 15 39 7 27 23 58 355 -1 -41 26 49 -41 4 31 -42 7 24 -40 24 22 169 0 0 -41 12 2 7 27 30 58 353 -1 -41 23 12 -41 0 54 -42 3 48 -40 20 44 170 0 0 -41 8 15 7 27 36 58 351 -2 -41 19 25 -40 57 7 -42 0 2 -40 16 57 171 0 0 -41 4 19 7 27 43 58 350 -3 -41 15 29 -40 53 10 -41 56 7 -40 12 59 172 0 0 -41 0 12 7 27 49 58 348 -4 -41 11 23 -40 49 3 -41 52 1 -40 8 51 173 0 0 -40 55 56 7 27 56 58 346 -4 -41 7 7 -40 44 46 -41 47 46 -40 4 34 174 0 0 -40 51 30 7 28 2 58 344 -5 -41 2 41 -40 40 20 -41 43 21 -40 0 7 175 0 0 -40 46 54 7 28 8 58 342 -6 -40 58 6 -40 35 44 -41 38 47 -39 55 30 176 0 0 -40 42 9 7 28 15 58 340 -7 -40 53 21 -40 30 59 -41 34 3 -39 50 44 177 0 0 -40 37 14 7 28 21 57 338 -7 -40 48 26 -40 26 4 -41 29 9 -39 45 47 178 0 0 -40 32 10 7 28 28 57 336 -8 -40 43 22 -40 20 59 -41 24 6 -39 40 42 179 0 0 -40 26 56 7 28 34 57 334 -9 -40 38 8 -40 15 45 -41 18 54 -39 35 27 180 0 0 -40 21 33 7 28 41 57 333 -10 -40 32 45 -40 10 21 -41 13 32 -39 30 2 -179 0 0 -40 16 0 7 28 47 56 331 -10 -40 27 13 -40 4 49 -41 8 1 -39 24 28 -178 0 0 -40 10 18 7 28 53 56 329 -11 -40 21 32 -39 59 7 -41 2 20 -39 18 45 -177 0 0 -40 4 27 7 29 0 56 327 -12 -40 15 41 -39 53 15 -40 56 31 -39 12 53 -176 0 0 -39 58 27 7 29 6 55 326 -12 -40 9 41 -39 47 15 -40 50 32 -39 6 51 -175 0 0 -39 52 18 7 29 12 55 324 -13 -40 3 32 -39 41 5 -40 44 24 -39 0 41 -174 0 0 -39 46 0 7 29 19 55 322 -14 -39 57 14 -39 34 47 -40 38 7 -38 54 21 -173 0 0 -39 39 33 7 29 25 54 321 -15 -39 50 48 -39 28 19 -40 31 42 -38 47 53 -172 0 0 -39 32 57 7 29 31 54 319 -15 -39 44 12 -39 21 43 -40 25 7 -38 41 15 -171 0 0 -39 26 12 7 29 38 53 318 -16 -39 37 28 -39 14 58 -40 18 24 -38 34 29 -170 0 0 -39 19 19 7 29 44 53 316 -17 -39 30 35 -39 8 5 -40 11 32 -38 27 35 -169 0 0 -39 12 17 7 29 50 52 315 -17 -39 23 33 -39 1 3 -40 4 32 -38 20 31 -168 0 0 -39 5 7 7 29 56 52 313 -18 -39 16 23 -38 53 52 -39 57 23 -38 13 20 -167 0 0 -38 57 48 7 30 2 51 312 -19 -39 9 5 -38 46 33 -39 50 6 -38 6 0 -166 0 0 -38 50 22 7 30 9 51 310 -20 -39 1 39 -38 39 6 -39 42 41 -37 58 31 -165 0 0 -38 42 47 7 30 15 50 309 -20 -38 54 4 -38 31 31 -39 35 8 -37 50 55 -164 0 0 -38 35 4 7 30 21 50 308 -21 -38 46 21 -38 23 47 -39 27 26 -37 43 11 -163 0 0 -38 27 13 7 30 27 49 306 -22 -38 38 31 -38 15 56 -39 19 37 -37 35 18 -162 0 0 -38 19 14 7 30 33 49 305 -22 -38 30 32 -38 7 57 -39 11 39 -37 27 18 -161 0 0 -38 11 8 7 30 39 48 304 -23 -38 22 26 -37 59 50 -39 3 34 -37 19 10 -160 0 0 -38 2 54 7 30 44 47 302 -24 -38 14 13 -37 51 36 -38 55 22 -37 10 55 -159 0 0 -37 54 32 7 30 50 47 301 -24 -38 5 51 -37 43 14 -38 47 2 -37 2 32 -158 0 0 -37 46 3 7 30 56 46 300 -25 -37 57 23 -37 34 45 -38 38 35 -36 54 2 -157 0 0 -37 37 28 7 31 2 46 299 -26 -37 48 47 -37 26 9 -38 30 0 -36 45 25 -156 0 0 -37 28 45 7 31 8 45 298 -26 -37 40 5 -37 17 26 -38 21 19 -36 36 40 -155 0 0 -37 19 55 7 31 13 44 297 -27 -37 31 15 -37 8 36 -38 12 30 -36 27 49 -154 0 0 -37 10 58 7 31 19 44 295 -28 -37 22 19 -36 59 39 -38 3 35 -36 18 51 -153 0 0 -37 1 55 7 31 24 43 294 -28 -37 13 16 -36 50 36 -37 54 33 -36 9 47 -152 0 0 -36 52 46 7 31 30 42 293 -29 -37 4 7 -36 41 26 -37 45 25 -36 0 36 -151 0 0 -36 43 30 7 31 35 42 292 -30 -36 54 51 -36 32 9 -37 36 10 -35 51 19 -150 0 0 -36 34 8 7 31 41 41 291 -30 -36 45 29 -36 22 47 -37 26 49 -35 41 55 -149 0 0 -36 24 40 7 31 46 40 290 -31 -36 36 2 -36 13 19 -37 17 23 -35 32 26 -148 0 0 -36 15 6 7 31 51 39 289 -32 -36 26 28 -36 3 45 -37 7 50 -35 22 51 -147 0 0 -36 5 26 7 31 56 39 288 -32 -36 16 49 -35 54 5 -36 58 12 -35 13 11 -146 0 0 -35 55 41 7 32 1 38 288 -33 -36 7 4 -35 44 20 -36 48 28 -35 3 25 -145 0 0 -35 45 51 7 32 6 37 287 -33 -35 57 14 -35 34 29 -36 38 39 -34 53 33 -144 0 0 -35 35 56 7 32 11 36 286 -34 -35 47 19 -35 24 34 -36 28 44 -34 43 37 -143 0 0 -35 25 55 7 32 16 36 285 -35 -35 37 19 -35 14 33 -36 18 45 -34 33 36 -142 0 0 -35 15 50 7 32 21 35 284 -35 -35 27 14 -35 4 28 -36 8 41 -34 23 30 -141 0 0 -35 5 40 7 32 26 34 283 -36 -35 17 4 -34 54 18 -35 58 32 -34 13 19 -140 0 0 -34 55 26 7 32 30 33 282 -36 -35 6 50 -34 44 4 -35 48 19 -34 3 4 -139 0 0 -34 45 8 7 32 35 33 282 -37 -34 56 32 -34 33 45 -35 38 1 -33 52 45 -138 0 0 -34 34 46 7 32 39 32 281 -37 -34 46 10 -34 23 23 -35 27 40 -33 42 22 -137 0 0 -34 24 20 7 32 44 31 280 -38 -34 35 44 -34 12 57 -35 17 15 -33 31 55 -136 0 0 -34 13 50 7 32 48 30 279 -38 -34 25 15 -34 2 27 -35 6 46 -33 21 25 -135 0 0 -34 3 17 7 32 52 29 279 -39 -34 14 42 -33 51 54 -34 56 13 -33 10 51 -134 0 0 -33 52 41 7 32 56 29 278 -39 -34 4 6 -33 41 18 -34 45 38 -33 0 15 -133 0 0 -33 42 2 7 33 0 28 277 -40 -33 53 27 -33 30 38 -34 34 59 -32 49 35 -132 0 0 -33 31 20 7 33 4 27 276 -40 -33 42 45 -33 19 56 -34 24 18 -32 38 53 -131 0 0 -33 20 36 7 33 8 26 276 -41 -33 32 1 -33 9 12 -34 13 34 -32 28 8 -130 0 0 -33 9 49 7 33 11 25 275 -41 -33 21 14 -32 58 25 -34 2 47 -32 17 21 -129 0 0 -32 59 0 7 33 15 24 274 -41 -33 10 25 -32 47 36 -33 51 59 -32 6 31 -128 0 0 -32 48 9 7 33 18 24 274 -42 -32 59 34 -32 36 45 -33 41 8 -31 55 40 -127 0 0 -32 37 16 7 33 22 23 273 -42 -32 48 42 -32 25 52 -33 30 16 -31 44 47 -126 0 0 -32 26 22 7 33 25 22 272 -42 -32 37 48 -32 14 58 -33 19 22 -31 33 53 -125 0 0 -32 15 27 7 33 28 21 272 -43 -32 26 53 -32 4 3 -33 8 27 -31 22 58 -124 0 0 -32 4 31 7 33 31 20 271 -43 -32 15 56 -31 53 7 -32 57 31 -31 12 2 -123 0 0 -31 53 34 7 33 34 19 271 -43 -32 4 59 -31 42 10 -32 46 33 -31 1 5 -122 0 0 -31 42 36 7 33 37 19 270 -44 -31 54 2 -31 31 12 -32 35 36 -30 50 7 -121 0 0 -31 31 38 7 33 39 18 269 -44 -31 43 4 -31 20 14 -32 24 38 -30 39 9 -120 0 0 -31 20 40 7 33 42 17 269 -44 -31 32 6 -31 9 16 -32 13 40 -30 28 11 -119 0 0 -31 9 42 7 33 44 16 268 -44 -31 21 8 -30 58 18 -32 2 41 -30 17 13 -118 0 0 -30 58 45 7 33 47 15 268 -45 -31 10 10 -30 47 21 -31 51 44 -30 6 16 -117 0 0 -30 47 48 7 33 49 14 267 -45 -30 59 13 -30 36 24 -31 40 46 -29 55 19 -116 0 0 -30 36 51 7 33 51 13 267 -45 -30 48 17 -30 25 27 -31 29 50 -29 44 23 -115 0 0 -30 25 56 7 33 53 12 266 -45 -30 37 21 -30 14 32 -31 18 54 -29 33 29 -114 0 0 -30 15 2 7 33 55 12 266 -45 -30 26 27 -30 3 39 -31 8 0 -29 22 35 -113 0 0 -30 4 10 7 33 56 11 265 -45 -30 15 35 -29 52 46 -30 57 7 -29 11 43 -112 0 0 -29 53 19 7 33 58 10 264 -45 -30 4 44 -29 41 56 -30 46 15 -29 0 53 -111 0 0 -29 42 30 7 33 59 9 264 -45 -29 53 55 -29 31 7 -30 35 26 -28 50 5 -110 0 0 -29 31 44 7 34 1 8 263 -45 -29 43 8 -29 20 20 -30 24 39 -28 39 19 -109 0 0 -29 20 59 7 34 2 7 263 -45 -29 32 24 -29 9 36 -30 13 54 -28 28 35 -108 0 0 -29 10 18 7 34 3 6 262 -45 -29 21 42 -28 58 55 -30 3 11 -28 17 54 -107 0 0 -28 59 39 7 34 4 5 262 -45 -29 11 3 -28 48 16 -29 52 32 -28 7 16 -106 0 0 -28 49 3 7 34 4 4 261 -45 -29 0 27 -28 37 41 -29 41 55 .. .. .. -105 0 0 -28 38 31 7 34 5 4 261 -45 -28 49 55 -28 27 8 -29 31 22 .. .. .. -104 0 0 -28 28 2 7 34 5 3 261 -45 -28 39 26 -28 16 40 -29 20 52 .. .. .. -103 0 0 -28 17 37 7 34 6 2 260 -45 -28 29 0 -28 6 15 -29 10 26 .. .. .. -102 0 0 -28 7 15 7 34 6 1 260 -45 -28 18 39 -27 55 54 -29 0 4 .. .. .. Uncertainty in time = +/- 7 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 5776-00281-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 11 50.0086 DE: -09 38 52.496 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .033, .028 ) * V mag [mag]: 11.9 * B mag [mag]: 13.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1203) Nanna approx. diameter [km]: 35 approx. diameter ["]: .024 distance from Earth [AU]: 2.04500 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 688 number of rejected observations: 37 time covered by the observations: 1926 Oct 07 - 2008 Feb 18 1 sigma uncertainty ellipse (major, minor, PA): 0.053, 0.033, 73° remarks: * orbital elements for (1203) Nanna : Mean anomaly = 323.26835949 deg Arg. of pericenter = 175.38844099 deg Long. of node = 224.79173523 deg Inclination = 5.95668094 deg Eccentricity = 0.24755805 Semimajor axis = 2.88803473 AU Perihelion dist = 2.17307848 AU Mag: H = 11.60, G = 0.15 Epoch of elements : MJD 55136.31000000 TDT (2009 Nov 01.310) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Nov 1 1203 Nanna 7h 27.4m UT 11.9 21 11 50.009- 9 38 52.50TYC 5776-00281-1 13.5 15.8 35 2.6 2.045 2.206 1.88 165.3953 -9.649 64.06 -14.50 7.4560 0.02859 -0.52155 7.58121 0.43525 0.00537 0.00157 2000 322.00120420091026.00000175.388441224.791735 5.9566810.24755805 2.8880347 2.173078511.2 5.00.15 RATE 2.0081700 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.062 0.043 78 2.81 0.043 0 54545.5020091101_0281-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 16:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org