IOTA/IOTA-ES occultation update for (5) Astraea / TYC 0291-00146-1 event on 2008 Jun 06, 21:04 UT Visible from Europe, Arabia Summary ------- On 2008 Jun 06 UT, the 119 km diameter asteroid (5) Astraea will occult a 8.9 mag star in the constellation Virgo for observers along a path across Europe, Arabia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.2 mag to 11.0 mag (the magnitude of the asteroid) for at most 16.8 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, 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: 2008 Jun 06, 20:57 - 2008 Jun 06, 21:12 UT * magnitude of target star: 8.9 * magnitude drop [mag]: 2.2 * estimated maximum duration [s]: 16.8 * Moon: 13 % sunlit, 73° distance * Sun: 115° distance * rough path description: Europe, Arabia The occultation path -------------------- * approximate projected width [km]: 195 * 1 sigma uncertainty interval [path widths]: +/- 0.23 * 1 sigma uncertainty interval [seconds]: +/- 3.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .020 +/- .022) * 1 sigma uncertainty ellipse (major, minor, PA): ( .022", .020", 2° ) * approx speed of asteroid's shadow [km/s]: 7.1090 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0291-00146-1 by 5 Astraea on 2008 Jun 6 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude 5 50 45 60 58 1 20 57 49 28 206 -1 7 13 38 61 47 30 4 33 50 60 9 38 7 54 1 62 10 39 4 0 14 59 47 43 6 33 26 59 54 6 20 58 3 29 207 -2 7 53 34 60 42 2 5 18 45 59 7 9 8 32 29 61 4 26 4 46 2 58 45 52 7 15 21 58 52 0 20 58 17 30 208 -3 8 33 2 59 38 33 6 2 39 58 6 22 9 10 38 60 0 16 5 30 44 57 45 39 7 56 33 57 51 34 20 58 31 31 209 -4 9 12 4 58 36 50 6 45 40 57 7 6 9 48 31 58 57 57 6 14 28 56 46 55 8 37 10 56 52 38 20 58 45 31 210 -5 9 50 42 57 36 44 7 27 55 56 9 16 10 26 7 57 57 17 6 57 22 55 49 33 9 17 14 55 55 4 20 58 59 32 211 -6 10 29 0 56 38 7 8 9 28 55 12 43 11 3 29 56 58 9 7 39 32 54 53 26 9 56 50 54 58 47 20 59 14 33 212 -7 11 7 0 55 40 50 8 50 26 54 17 21 11 40 39 56 0 24 8 21 3 53 58 30 10 36 3 54 3 40 20 59 28 33 214 -8 11 44 45 54 44 49 9 30 53 53 23 6 12 17 39 55 3 57 9 2 1 53 4 37 11 14 54 53 9 38 20 59 42 34 215 -9 12 22 16 53 49 56 10 10 54 52 29 53 12 54 29 54 8 40 9 42 29 52 11 45 11 53 28 52 16 38 20 59 56 34 216 -10 12 59 37 52 56 8 10 50 30 51 37 37 13 31 12 53 14 29 10 22 32 51 19 49 12 31 47 51 24 33 21 0 10 35 217 -11 13 36 49 52 3 20 11 29 47 50 46 14 14 7 49 52 21 19 11 2 12 50 28 46 13 9 54 50 33 21 21 0 24 35 218 -12 14 13 54 51 11 27 12 8 47 49 55 42 14 44 23 51 29 7 11 41 35 49 38 31 13 47 50 49 42 59 21 0 38 35 219 -13 14 50 54 50 20 26 12 47 33 49 5 57 15 20 54 50 37 47 12 20 41 48 49 3 14 25 39 48 53 24 21 0 52 36 220 -14 15 27 51 49 30 13 13 26 8 48 16 56 15 57 25 49 47 17 12 59 35 48 0 18 15 3 23 48 4 32 21 1 6 36 222 -15 16 4 46 48 40 47 14 4 33 47 28 38 16 33 56 48 57 35 13 38 18 47 12 14 15 41 3 47 16 21 21 1 20 36 223 -15 16 41 43 47 52 3 14 42 52 46 40 58 17 10 30 48 8 36 14 16 53 46 24 48 16 18 42 46 28 48 21 1 34 37 224 -16 17 18 41 47 4 0 15 21 7 45 53 55 17 47 8 47 20 18 14 55 22 45 37 59 16 56 22 45 41 53 21 1 48 37 225 -17 17 55 44 46 16 35 15 59 19 45 7 28 18 23 52 46 32 39 15 33 48 44 51 44 17 34 4 44 55 32 21 2 2 37 226 -18 18 32 52 45 29 47 16 37 31 44 21 34 19 0 43 45 45 38 16 12 13 44 6 2 18 11 50 44 9 44 21 2 16 37 227 -19 19 10 7 44 43 32 17 15 45 43 36 12 19 37 43 44 59 11 16 50 38 43 20 51 18 49 42 43 24 28 21 2 30 37 228 -20 19 47 31 43 57 51 17 54 2 42 51 19 20 14 53 44 13 17 17 29 6 42 36 10 19 27 43 42 39 40 21 2 44 37 230 -21 20 25 6 43 12 39 18 32 25 42 6 55 20 52 15 43 27 54 18 7 39 41 51 56 20 5 53 41 55 21 21 2 58 37 231 -22 21 2 53 42 27 57 19 10 55 41 22 58 21 29 50 42 43 2 18 46 18 41 8 9 20 44 14 41 11 29 21 3 12 37 232 -23 21 40 54 41 43 43 19 49 35 40 39 27 22 7 41 41 58 37 19 25 5 40 24 47 21 22 49 40 28 2 21 3 26 37 233 -24 22 19 10 40 59 55 20 28 26 39 56 20 22 45 48 41 14 39 20 4 2 39 41 50 22 1 38 39 44 59 21 3 40 37 234 -24 22 57 44 40 16 32 21 7 30 39 13 37 23 24 14 40 31 7 20 43 12 38 59 15 22 40 45 39 2 19 21 3 54 37 235 -25 23 36 37 39 33 33 21 46 48 38 31 16 24 3 0 39 47 58 21 22 36 38 17 2 23 20 10 38 20 1 21 4 8 37 236 -26 24 15 51 38 50 57 22 26 24 37 49 16 24 42 9 39 5 13 22 2 16 37 35 11 23 59 57 37 38 5 21 4 22 37 238 -27 24 55 28 38 8 42 23 6 18 37 7 36 25 21 41 38 22 50 22 42 13 36 53 39 24 40 6 36 56 28 21 4 36 37 239 -28 25 35 31 37 26 48 23 46 33 36 26 16 26 1 40 37 40 48 23 22 31 36 12 26 25 20 40 36 15 10 21 4 51 37 240 -29 26 16 0 36 45 13 24 27 11 35 45 14 26 42 7 36 59 6 24 3 10 35 31 31 26 1 41 35 34 10 21 5 5 37 241 -30 26 56 59 36 3 58 25 8 14 35 4 30 27 23 5 36 17 43 24 44 14 34 50 54 26 43 12 34 53 27 21 5 19 37 242 -30 27 38 30 35 23 0 25 49 45 34 24 2 28 4 36 35 36 37 25 25 44 34 10 33 27 25 14 34 13 1 21 5 33 36 243 -31 28 20 35 34 42 19 26 31 45 33 43 50 28 46 42 34 55 49 26 7 44 33 30 27 28 7 51 33 32 51 21 5 47 36 244 -32 29 3 16 34 1 54 27 14 17 33 3 54 29 29 26 34 15 18 26 50 14 32 50 37 28 51 5 32 52 55 21 6 1 36 245 -33 29 46 38 33 21 44 27 57 24 32 24 12 30 12 51 33 35 2 27 33 18 32 11 1 29 35 0 32 13 14 21 6 15 35 246 -34 30 30 43 32 41 50 28 41 10 31 44 44 30 57 1 32 55 1 28 16 59 31 31 39 30 19 38 31 33 46 21 6 29 35 247 -34 31 15 34 32 2 9 29 25 36 31 5 28 31 41 58 32 15 14 29 1 20 30 52 29 31 5 3 30 54 31 21 6 43 35 248 -35 32 1 15 31 22 41 30 10 46 30 26 26 32 27 47 31 35 40 29 46 24 30 13 32 31 51 18 30 15 28 21 6 57 34 249 -36 32 47 49 30 43 26 30 56 43 29 47 35 33 14 31 30 56 19 30 32 14 29 34 47 32 38 28 29 36 37 21 7 11 34 250 -37 33 35 22 30 4 23 31 43 33 29 8 55 34 2 16 30 17 10 31 18 54 28 56 12 33 26 37 28 57 56 21 7 25 33 251 -38 34 23 58 29 25 30 32 31 18 28 30 26 34 51 5 29 38 12 32 6 29 28 17 48 34 15 50 28 19 26 21 7 39 33 252 -38 35 13 42 28 46 49 33 20 3 27 52 7 35 41 4 28 59 25 32 55 2 27 39 34 35 6 13 27 41 5 21 7 53 32 253 -39 36 4 41 28 8 17 34 9 54 27 13 57 36 32 20 28 20 48 33 44 39 27 1 29 35 57 52 27 2 54 21 8 7 32 254 -40 36 57 0 27 29 54 35 0 56 26 35 56 37 25 0 27 42 20 34 35 26 26 23 33 36 50 53 26 24 50 21 8 21 31 255 -41 37 50 48 26 51 39 35 53 15 25 58 3 38 19 11 27 4 0 35 27 27 25 45 44 37 45 25 25 46 54 21 8 35 30 256 -41 38 46 12 26 13 32 36 46 59 25 20 17 39 15 2 26 25 48 36 20 51 25 8 3 38 41 36 25 9 5 21 8 49 30 257 -42 39 43 24 25 35 33 37 42 16 24 42 38 40 12 45 25 47 43 37 15 45 24 30 29 39 39 37 24 31 22 21 9 3 29 258 -43 40 42 35 24 57 39 38 39 15 24 5 6 41 12 30 25 9 45 38 12 18 23 53 1 40 39 39 23 53 45 21 9 17 28 259 -43 41 43 58 24 19 51 39 38 8 23 27 39 42 14 33 24 31 51 39 10 40 23 15 38 41 41 58 23 16 12 21 9 31 27 260 -44 42 47 49 23 42 7 40 39 5 22 50 16 43 19 11 23 54 3 40 11 4 22 38 20 42 46 50 22 38 43 21 9 45 26 260 -45 43 54 27 23 4 27 41 42 23 22 12 57 44 26 45 23 16 17 41 13 42 22 1 6 43 54 34 22 1 16 21 9 59 25 261 -45 45 4 17 22 26 50 42 48 19 21 35 42 45 37 39 22 38 34 42 18 53 21 23 55 45 5 37 21 23 52 21 10 14 24 262 -46 46 17 49 21 49 13 43 57 14 20 58 28 46 52 28 22 0 52 43 26 56 20 46 46 46 20 30 20 46 27 21 10 28 23 263 -46 47 35 39 21 11 36 45 9 36 20 21 15 48 11 51 21 23 9 44 38 15 20 9 38 47 39 52 20 9 2 21 10 42 22 264 -47 48 58 38 20 33 57 46 25 57 19 44 1 49 36 45 20 45 23 45 53 22 19 32 30 49 4 38 19 31 33 21 10 56 20 264 -47 50 27 54 19 56 14 47 47 1 19 6 46 51 8 26 20 7 32 47 12 57 18 55 20 50 35 59 18 53 59 21 11 10 19 265 -48 52 5 2 19 18 22 49 13 45 18 29 26 52 48 43 19 29 32 48 37 50 18 18 6 52 15 42 18 16 15 21 11 24 17 266 -48 53 52 26 18 40 18 50 47 29 17 51 59 54 40 29 18 51 17 50 9 14 17 40 46 54 6 25 17 38 16 21 11 38 16 267 -48 55 54 3 18 1 54 52 30 8 17 14 21 56 48 34 18 12 38 51 48 50 17 3 17 56 12 36 16 59 55 21 11 52 14 268 -48 58 17 13 17 22 55 54 24 42 16 36 27 59 22 41 17 33 16 53 39 11 16 25 32 58 42 55 16 20 54 21 12 6 11 269 -48 61 19 16 16 42 50 56 36 22 15 58 5 62 49 19 16 52 23 55 44 31 15 47 25 61 59 22 15 40 32 21 12 20 8 270 -47 66 17 52 15 59 15 59 15 38 15 18 58 ... .. .. .. .. .. 58 12 55 15 8 40 68 45 47 14 53 50 21 12 34 1 271 -44 ... .. .. .. .. .. 62 52 19 14 38 9 ... .. .. .. .. .. 61 24 1 14 28 40 Uncertainty in time = +/- 4 secs [Prediction of 2008 May 22.0] Data for the target star ------------------------ * name: TYC 0291-00146-1 * constellation : Virgo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 12 53 46.4889 DE: +01 47 03.725 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .016, .021 ) * V mag [mag]: 8.9 * B mag [mag]: 10.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5) Astraea approx. diameter [km]: 119 approx. diameter ["]: .094 distance from Earth [AU]: 1.74700 * orbital information: orbit source: Preston date of fit: 2008 May 21 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1529 number of rejected observations: 218 time covered by the observations: 1901 May 25 - 2008 May 19 1 sigma uncertainty ellipse (major, minor, PA): 0.012, 0.008, 109° remarks: * orbital elements for (5) Astraea : Mean anomaly = 55.03709389 deg Arg. of pericenter = 357.49259496 deg Long. of node = 141.67773637 deg Inclination = 5.36899297 deg Eccentricity = 0.19236154 Semimajor axis = 2.57305753 AU Perihelion dist = 2.07810023 AU Mag: H = 6.87, G = 0.15 Epoch of elements : MJD 54623.87800000 TDT (2008 Jun 06.878) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jun 6 5 Astraea 21h 3.4m UT 8.9 12 53 46.489 1 47 3.72TYC 0291-00146-1 10.4 11.0 119 16.8 1.747 1.068 -12.33 -18.0586 1.789 -136.15 22.76 21.0573 0.48281 0.62742 3.17843 -2.44905 0.00441 -0.00217 2000 54.1110372008 6 3.00000357.492595141.677736 5.3689930.19236154 2.5730575 2.0781002 6.9 5.00.15 RATE 2.3879750 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.022 0.020 2 1.23 0.021 0 54608.5020080606_0146-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 May 22, 04:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org