IOTA/IOTA-ES occultation update for (2632) Guizhou / TYC 2411-01355-1 event on 2008 Mar 01, 22:17 UT Visible from Africa, Portugal Summary ------- On 2008 Mar 01 UT, the 29 km diameter asteroid (2632) Guizhou will occult a 8.5 mag star in the constellation Auriga for observers along a path across Africa, Portugal. In the case of an occultation, the combined light of the asteroid and the star will drop by 8.7 mag to 17.2 mag (the magnitude of the asteroid) for at most 2.9 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: 14 * date and approx. time of event: 2008 Mar 01, 22:13 - 2008 Mar 01, 22:26 UT * magnitude of target star: 8.5 * magnitude drop [mag]: 8.7 * estimated maximum duration [s]: 2.9 * Moon: 33 % sunlit, 168° distance * Sun: 101° distance * rough path description: Africa, Portugal The occultation path -------------------- * approximate projected width [km]: 31 * 1 sigma uncertainty interval [path widths]: +/- 4.66 * 1 sigma uncertainty interval [seconds]: +/- 11.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .069 +/- .064) * 1 sigma uncertainty ellipse (major, minor, PA): ( .069", .064", 77° ) * approx speed of asteroid's shadow [km/s]: 10.1707 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2411-01355-1 by 2632 Guizhou on 2008 Mar 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 - 74 0 0 63 47 9 22 13 5 58 143 0 63 38 32 63 55 47 62 18 36 65 16 41 - 73 0 0 63 42 4 22 13 10 58 144 -1 63 33 26 63 50 44 62 13 18 65 11 50 - 72 0 0 63 36 37 22 13 14 58 146 -1 63 27 58 63 45 18 62 7 38 65 6 37 - 71 0 0 63 30 48 22 13 19 59 147 -2 63 22 7 63 39 30 62 1 34 65 1 3 - 70 0 0 63 24 36 22 13 24 59 149 -2 63 15 53 63 33 19 61 55 6 64 55 6 - 69 0 0 63 18 1 22 13 29 59 150 -2 63 9 16 63 26 46 61 48 14 64 48 48 - 68 0 0 63 11 2 22 13 33 60 152 -3 63 2 16 63 19 49 61 40 58 64 42 7 - 67 0 0 63 3 40 22 13 38 60 153 -3 62 54 52 63 12 28 61 33 18 64 35 4 - 66 0 0 62 55 53 22 13 43 60 155 -4 62 47 3 63 4 44 61 25 12 64 27 37 - 65 0 0 62 47 42 22 13 48 61 157 -4 62 38 50 62 56 35 61 16 41 64 19 47 - 64 0 0 62 39 6 22 13 54 61 158 -5 62 30 12 62 48 1 61 7 44 64 11 33 - 63 0 0 62 30 5 22 13 59 61 160 -5 62 21 9 62 39 2 60 58 20 64 2 55 - 62 0 0 62 20 38 22 14 4 62 161 -6 62 11 40 62 29 37 60 48 30 63 53 52 - 61 0 0 62 10 45 22 14 9 62 163 -6 62 1 44 62 19 46 60 38 13 63 44 23 - 60 0 0 62 0 25 22 14 15 62 165 -7 61 51 22 62 9 29 60 27 28 63 34 29 - 59 0 0 61 49 37 22 14 20 63 167 -7 61 40 32 61 58 44 60 16 15 63 24 8 - 58 0 0 61 38 22 22 14 26 63 168 -7 61 29 14 61 47 31 60 4 32 63 13 21 - 57 0 0 61 26 39 22 14 31 63 170 -8 61 17 27 61 35 50 59 52 21 63 2 6 - 56 0 0 61 14 26 22 14 37 63 172 -8 61 5 12 61 23 41 59 39 40 62 50 23 - 55 0 0 61 1 44 22 14 43 64 174 -9 60 52 27 61 11 1 59 26 28 62 38 11 - 54 0 0 60 48 31 22 14 48 64 176 -9 60 39 11 60 57 52 59 12 45 62 25 31 - 53 0 0 60 34 48 22 14 54 64 178 -10 60 25 25 60 44 12 58 58 29 62 12 20 - 52 0 0 60 20 33 22 15 0 64 179 -11 60 11 7 60 30 0 58 43 42 61 58 39 - 51 0 0 60 5 46 22 15 6 65 181 -11 59 56 16 60 15 16 58 28 21 61 44 26 - 50 0 0 59 50 26 22 15 13 65 183 -12 59 40 53 59 59 59 58 12 26 61 29 42 - 49 0 0 59 34 32 22 15 19 65 186 -12 59 24 55 59 44 9 57 55 57 61 14 25 - 48 0 0 59 18 3 22 15 25 65 188 -13 59 8 23 59 27 44 57 38 52 60 58 34 - 47 0 0 59 0 59 22 15 32 66 190 -13 58 51 15 59 10 44 57 21 11 60 42 8 - 46 0 0 58 43 19 22 15 38 66 192 -14 58 33 32 58 53 7 57 2 53 60 25 8 - 45 0 0 58 25 2 22 15 45 66 194 -14 58 15 11 58 34 54 56 43 56 60 7 31 - 44 0 0 58 6 7 22 15 52 66 196 -15 57 56 12 58 16 3 56 24 21 59 49 18 - 43 0 0 57 46 33 22 15 59 66 199 -16 57 36 34 57 56 33 56 4 7 59 30 26 - 42 0 0 57 26 20 22 16 6 66 201 -16 57 16 16 57 36 24 55 43 12 59 10 56 - 41 0 0 57 5 26 22 16 13 66 203 -17 56 55 18 57 15 34 55 21 35 58 50 46 - 40 0 0 56 43 50 22 16 21 67 206 -17 56 33 38 56 54 3 54 59 17 58 29 55 - 39 0 0 56 21 32 22 16 28 67 208 -18 56 11 16 56 31 49 54 36 15 58 8 23 - 38 0 0 55 58 30 22 16 36 67 211 -19 55 48 10 56 8 52 54 12 29 57 46 8 - 37 0 0 55 34 44 22 16 43 67 213 -19 55 24 19 55 45 10 53 47 58 57 23 9 - 36 0 0 55 10 13 22 16 51 67 216 -20 54 59 44 55 20 43 53 22 40 56 59 25 - 35 0 0 54 44 55 22 16 59 67 218 -21 54 34 21 54 55 30 52 56 36 56 34 56 - 34 0 0 54 18 50 22 17 7 67 221 -21 54 8 12 54 29 30 52 29 44 56 9 40 - 33 0 0 53 51 57 22 17 15 67 224 -22 53 41 13 54 2 41 52 2 3 55 43 36 - 32 0 0 53 24 14 22 17 24 66 226 -23 53 13 26 53 35 3 51 33 33 55 16 43 - 31 0 0 52 55 41 22 17 32 66 229 -24 52 44 48 53 6 35 51 4 12 54 49 0 - 30 0 0 52 26 17 22 17 41 66 231 -24 52 15 19 52 37 15 50 33 59 54 20 26 - 29 0 0 51 56 0 22 17 50 66 234 -25 51 44 58 52 7 4 50 2 55 53 51 1 - 28 0 0 51 24 51 22 17 59 66 237 -26 51 13 44 51 35 59 49 30 57 53 20 42 - 27 0 0 50 52 47 22 18 8 65 239 -27 50 41 35 51 4 0 48 58 5 52 49 30 - 26 0 0 50 19 49 22 18 17 65 242 -28 50 8 33 50 31 7 48 24 19 52 17 23 - 25 0 0 49 45 56 22 18 27 65 244 -29 49 34 35 49 57 19 47 49 37 51 44 20 - 24 0 0 49 11 7 22 18 36 64 247 -29 48 59 40 49 22 34 47 14 0 51 10 21 - 23 0 0 48 35 20 22 18 46 64 249 -30 48 23 50 48 46 53 46 37 27 50 35 24 - 22 0 0 47 58 37 22 18 56 64 252 -31 47 47 2 48 10 14 45 59 57 49 59 30 - 21 0 0 47 20 56 22 19 6 63 254 -32 47 9 16 47 32 37 45 21 30 49 22 38 - 20 0 0 46 42 17 22 19 16 63 257 -33 46 30 32 46 54 3 44 42 6 48 44 46 - 19 0 0 46 2 40 22 19 27 62 259 -34 45 50 51 46 14 30 44 1 45 48 5 55 - 18 0 0 45 22 4 22 19 37 61 261 -35 45 10 11 45 33 58 43 20 26 47 26 5 - 17 0 0 44 40 30 22 19 48 61 263 -36 44 28 32 44 52 28 42 38 11 46 45 15 - 16 0 0 43 57 57 22 19 58 60 265 -37 43 45 56 44 10 0 41 54 58 46 3 26 - 15 0 0 43 14 27 22 20 9 59 267 -38 43 2 22 43 26 34 41 10 50 45 20 36 - 14 0 0 42 29 59 22 20 20 59 269 -39 42 17 51 42 42 10 40 25 45 44 36 48 - 13 0 0 41 44 35 22 20 31 58 271 -40 41 32 23 41 56 48 39 39 46 43 52 1 - 12 0 0 40 58 14 22 20 42 57 273 -41 40 45 59 41 10 31 38 52 53 43 6 15 - 11 0 0 40 10 59 22 20 53 56 275 -42 39 58 40 40 23 19 38 5 6 42 19 33 - 10 0 0 39 22 49 22 21 4 55 277 -43 39 10 28 39 35 12 37 16 29 41 31 54 - 9 0 0 38 33 47 22 21 16 55 278 -44 38 21 23 38 46 13 36 27 1 40 43 20 - 8 0 0 37 43 54 22 21 27 54 280 -46 37 31 28 37 56 22 35 36 45 39 53 53 - 7 0 0 36 53 12 22 21 38 53 281 -47 36 40 44 37 5 42 34 45 42 39 3 33 - 6 0 0 36 1 43 22 21 50 52 283 -48 35 49 13 36 14 15 33 53 55 38 12 23 - 5 0 0 35 9 29 22 22 1 51 284 -49 34 56 57 35 22 2 33 1 25 37 20 26 - 4 0 0 34 16 31 22 22 12 50 286 -50 34 3 58 34 29 6 32 8 16 36 27 42 - 3 0 0 33 22 54 22 22 23 48 287 -52 33 10 20 33 35 30 31 14 30 35 34 15 - 2 0 0 32 28 39 22 22 34 47 288 -53 32 16 5 32 41 15 30 20 9 34 40 7 - 1 0 0 31 33 49 22 22 45 46 289 -54 31 21 15 31 46 26 29 25 17 33 45 21 0 0 0 30 38 28 22 22 56 45 290 -55 30 25 53 30 51 5 28 29 55 32 50 0 1 0 0 29 42 38 22 23 7 44 292 -57 29 30 4 29 55 15 27 34 9 31 54 8 2 0 0 28 46 23 22 23 18 43 293 -58 28 33 49 28 58 59 26 38 0 30 57 46 3 0 0 27 49 46 22 23 28 41 293 -59 27 37 13 28 2 21 25 41 32 30 1 0 4 0 0 26 52 50 22 23 39 40 294 -61 26 40 19 27 5 24 24 44 49 29 3 52 5 0 0 25 55 40 22 23 49 39 295 -62 25 43 10 26 8 12 23 47 54 28 6 25 6 0 0 24 58 18 22 23 59 38 296 -63 24 45 49 25 10 48 22 50 50 27 8 45 7 0 0 24 0 48 22 24 8 36 297 -64 23 48 21 24 13 16 21 53 41 26 10 53 8 0 0 23 3 14 22 24 18 35 298 -66 22 50 49 23 15 39 20 56 30 25 12 54 9 0 0 22 5 39 22 24 27 34 298 -67 21 53 17 22 18 2 19 59 21 24 14 52 10 0 0 21 8 6 22 24 36 33 299 -69 20 55 48 21 20 27 19 2 18 23 16 50 11 0 0 20 10 40 22 24 44 31 299 -70 19 58 25 20 22 58 18 5 22 22 18 51 12 0 0 19 13 24 22 24 53 30 300 -71 19 1 12 19 25 38 17 8 39 21 21 1 13 0 0 18 16 21 22 25 1 29 300 -73 18 4 12 18 28 31 16 12 10 20 23 21 14 0 0 17 19 34 22 25 8 27 301 -74 17 7 28 17 31 41 15 16 0 19 25 55 15 0 0 16 23 6 22 25 16 26 301 -75 16 11 4 16 35 9 14 20 11 18 28 47 16 0 0 15 27 1 22 25 22 25 302 -77 15 15 3 15 39 0 13 24 45 17 31 59 17 0 0 14 31 20 22 25 29 23 302 -78 14 19 27 14 43 15 12 29 46 16 35 36 18 0 0 13 36 8 22 25 35 22 303 -79 13 24 19 13 47 59 11 35 16 15 39 38 19 0 0 12 41 26 22 25 41 21 303 -81 12 29 41 12 53 13 10 41 18 14 44 11 20 0 0 11 47 18 22 25 47 19 303 -82 11 35 37 11 59 0 9 47 53 13 49 15 21 0 0 10 53 44 22 25 52 18 303 -83 10 42 8 11 5 22 8 55 5 12 54 54 22 0 0 10 0 48 22 25 56 17 304 -85 9 49 16 10 12 21 8 2 55 12 1 9 23 0 0 9 8 31 22 26 1 15 304 -86 8 57 4 9 19 59 7 11 24 11 8 3 24 0 0 8 16 55 22 26 5 14 304 -87 8 5 33 8 28 19 6 20 35 10 15 38 25 0 0 7 26 2 22 26 8 13 304 -88 7 14 45 7 37 21 5 30 29 9 23 56 26 0 0 6 35 54 22 26 12 12 304 -89 6 24 41 6 47 8 4 41 8 8 32 57 27 0 0 5 46 31 22 26 15 10 304 -88 5 35 23 5 57 41 3 52 33 7 42 45 28 0 0 4 57 56 22 26 17 9 305 -87 4 46 52 5 9 1 3 4 44 6 53 19 29 0 0 4 10 8 22 26 19 8 305 -86 3 59 9 4 21 8 .. .. .. 6 4 42 30 0 0 3 23 10 22 26 21 6 305 -85 3 12 16 3 34 5 .. .. .. 5 16 54 31 0 0 2 37 1 22 26 23 5 305 -84 2 26 12 2 47 52 .. .. .. 4 29 57 32 0 0 1 51 44 22 26 24 4 305 -82 1 40 59 2 2 30 .. .. .. 3 43 50 33 0 0 1 7 18 22 26 25 3 305 -81 0 56 37 1 17 59 .. .. .. 2 58 36 34 0 0 0 23 43 22 26 25 1 305 -80 0 13 7 0 34 20 .. .. .. 2 14 14 35 0 0 - 0 18 59 22 26 25 0 305 -79 - 0 29 30 - 0 8 26 .. .. .. 1 30 44 Uncertainty in time = +/- 14 secs [Prediction of 2008 Feb 14.0] Data for the target star ------------------------ * name: TYC 2411-01355-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 27 55.0892 DE: +34 53 30.537 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .013, .014 ) * V mag [mag]: 8.5 * B mag [mag]: 9.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2632) Guizhou approx. diameter [km]: 29 approx. diameter ["]: .014 distance from Earth [AU]: 2.88300 * orbital information: orbit source: Preston date of fit: 2008 Jan 19 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 850 number of rejected observations: 20 time covered by the observations: 1948 Nov 05 - 2007 Sep 22 1 sigma uncertainty ellipse (major, minor, PA): 0.068, 0.062, 76° remarks: * orbital elements for (2632) Guizhou : Mean anomaly = 122.32763121 deg Arg. of pericenter = 310.96702756 deg Long. of node = 18.64519339 deg Inclination = 10.46636739 deg Eccentricity = 0.10270102 Semimajor axis = 3.04189624 AU Perihelion dist = 2.72949041 AU Mag: H = 11.48, G = 0.15 Epoch of elements : MJD 54526.92800000 TDT (2008 Mar 01.928) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Mar 1 2632 Guizhou 22h 16.8m UT 8.5 5 27 55.089 34 53 30.54TYC 2411-01355-1 9.4 17.2 29 2.9 2.883 1.307 -6.96 -52.3040 34.894 -151.15 -7.17 22.2798 0.15397 0.35806 5.26680 -2.28374 0.00584 0.00008 2000 121.0405812008 224.00000310.967028 18.645193 10.4663670.10270102 3.0418962 2.729490411.4 5.00.15 RATE 1.8577510 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.069 0.064 77 5.66 0.065 0 54510.5020080301_1355-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Feb 14, 02:30 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org