IOTA/IOTA-ES occultation update for (679) Pax / TYC 0659-00050-1 event on 2008 Apr 02, 10:39 UT Visible from NE Russia Summary ------- On 2008 Apr 02 UT, the 52 km diameter asteroid (679) Pax will occult a 11.3 mag star in the constellation Taurus for observers along a path across NE Russia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.4 mag to 13.6 mag (the magnitude of the asteroid) for at most 1.2 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: 72 * date and approx. time of event: 2008 Apr 02, 10:41 - 2008 Apr 02, 10:41 UT * magnitude of target star: 11.3 * magnitude drop [mag]: 2.4 * estimated maximum duration [s]: 1.2 * Moon: 17 % sunlit, 95° distance * Sun: 47° distance * rough path description: NE Russia The occultation path -------------------- * approximate projected width [km]: 62 * 1 sigma uncertainty interval [path widths]: +/- 0.80 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .021) * 1 sigma uncertainty ellipse (major, minor, PA): ( .030", .021", 83° ) * approx speed of asteroid's shadow [km/s]: 43.5215 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0659-00050-1 by 679 Pax on 2008 Apr 2 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 120 0 0 59 32 47 10 41 0 27 241 0 59 15 49 59 49 48 58 48 48 60 17 9 121 0 0 59 37 56 10 41 1 27 242 -1 59 21 0 59 54 56 58 54 1 60 22 14 122 0 0 59 42 47 10 41 1 26 243 -1 59 25 53 59 59 45 58 58 56 60 27 1 123 0 0 59 47 20 10 41 2 26 243 -2 59 30 27 60 4 17 59 3 33 60 31 30 124 0 0 59 51 35 10 41 3 25 244 -2 59 34 44 60 8 31 59 7 51 60 35 42 125 0 0 59 55 33 10 41 3 25 245 -3 59 38 42 60 12 27 59 11 52 60 39 36 126 0 0 59 59 13 10 41 4 24 246 -3 59 42 23 60 16 5 59 15 34 60 43 13 127 0 0 60 2 35 10 41 5 24 247 -4 59 45 46 60 19 27 59 18 59 60 46 32 128 0 0 60 5 40 10 41 5 23 248 -4 59 48 52 60 22 30 59 22 6 60 49 34 129 0 0 60 8 27 10 41 6 23 249 -5 59 51 40 60 25 17 59 24 56 60 52 19 130 0 0 60 10 57 10 41 6 22 250 -5 59 54 11 60 27 46 59 27 28 60 54 47 131 0 0 60 13 9 10 41 7 22 251 -5 59 56 24 60 29 58 59 29 42 60 56 58 132 0 0 60 15 5 10 41 8 21 252 -6 59 58 20 60 31 53 59 31 39 60 58 52 133 0 0 60 16 43 10 41 8 21 253 -6 59 59 59 60 33 30 59 33 19 61 0 29 134 0 0 60 18 4 10 41 9 20 254 -7 60 1 20 60 34 51 59 34 41 61 1 49 135 0 0 60 19 8 10 41 9 20 255 -7 60 2 25 60 35 55 59 35 46 61 2 52 136 0 0 60 19 55 10 41 10 19 255 -8 60 3 12 60 36 41 59 36 33 61 3 38 137 0 0 60 20 25 10 41 10 19 256 -8 60 3 42 60 37 11 59 37 4 61 4 8 138 0 0 60 20 38 10 41 11 18 257 -9 60 3 55 60 37 24 59 37 17 61 4 21 139 0 0 60 20 34 10 41 11 18 258 -9 60 3 51 60 37 20 59 37 12 61 4 16 140 0 0 60 20 12 10 41 12 17 259 -9 60 3 29 60 36 59 59 36 51 61 3 56 141 0 0 60 19 34 10 41 12 17 260 -10 60 2 51 60 36 21 59 36 12 61 3 18 142 0 0 60 18 39 10 41 13 17 261 -10 60 1 55 60 35 26 59 35 16 61 2 24 143 0 0 60 17 27 10 41 13 16 262 -11 60 0 42 60 34 14 59 34 2 61 1 12 144 0 0 60 15 57 10 41 13 16 263 -11 59 59 12 60 32 45 59 32 32 60 59 44 145 0 0 60 14 11 10 41 14 15 264 -12 59 57 25 60 30 59 59 30 43 60 57 59 146 0 0 60 12 7 10 41 14 15 264 -12 59 55 21 60 28 56 59 28 38 60 55 57 147 0 0 60 9 46 10 41 15 14 265 -13 59 52 59 60 26 36 59 26 15 60 53 38 148 0 0 60 7 8 10 41 15 14 266 -13 59 50 20 60 23 58 59 23 34 60 51 2 149 0 0 60 4 12 10 41 15 13 267 -13 59 47 24 60 21 4 59 20 36 60 48 9 150 0 0 60 0 59 10 41 16 13 268 -14 59 44 10 60 17 52 59 17 21 60 44 59 151 0 0 59 57 29 10 41 16 12 269 -14 59 40 38 60 14 23 59 13 47 60 41 32 152 0 0 59 53 41 10 41 16 12 270 -15 59 36 49 60 10 36 59 9 56 60 37 47 153 0 0 59 49 35 10 41 17 11 271 -15 59 32 42 60 6 32 59 5 47 60 33 45 154 0 0 59 45 12 10 41 17 11 271 -16 59 28 17 60 2 10 59 1 20 60 29 25 155 0 0 59 40 31 10 41 17 10 272 -16 59 23 35 59 57 30 58 56 35 60 24 48 156 0 0 59 35 32 10 41 17 10 273 -16 59 18 34 59 52 33 58 51 32 60 19 53 157 0 0 59 30 15 10 41 18 9 274 -17 59 13 15 59 47 17 58 46 11 60 14 41 158 0 0 59 24 39 10 41 18 9 275 -17 59 7 38 59 41 44 58 40 31 60 9 10 159 0 0 59 18 46 10 41 18 8 276 -18 59 1 43 59 35 52 58 34 33 60 3 21 160 0 0 59 12 34 10 41 18 7 277 -18 58 55 29 59 29 42 58 28 16 59 57 14 161 0 0 59 6 3 10 41 19 7 278 -19 58 48 57 59 23 14 58 21 41 59 50 49 162 0 0 58 59 14 10 41 19 6 278 -19 58 42 5 59 16 26 58 14 46 59 44 5 163 0 0 58 52 6 10 41 19 6 279 -19 58 34 55 59 9 21 58 7 32 59 37 3 164 0 0 58 44 39 10 41 19 5 280 -20 58 27 26 59 1 56 58 0 0 59 29 42 165 0 0 58 36 53 10 41 19 5 281 -20 58 19 38 58 54 12 57 52 8 59 22 2 166 0 0 58 28 48 10 41 19 4 282 -21 58 11 30 58 46 9 57 43 56 59 14 3 167 0 0 58 20 23 10 41 20 4 283 -21 58 3 2 58 37 47 57 35 25 59 5 44 168 0 0 58 11 38 10 41 20 3 284 -22 57 54 15 58 29 5 57 26 34 58 57 7 169 0 0 58 2 34 10 41 20 3 284 -22 57 45 9 58 20 3 57 17 23 58 48 9 170 0 0 57 53 10 10 41 20 2 285 -22 57 35 42 58 10 42 57 7 52 58 38 52 171 0 0 57 43 25 10 41 20 2 286 -23 57 25 55 58 1 0 56 58 1 58 29 15 172 0 0 57 33 21 10 41 20 1 287 -23 57 15 47 57 50 58 56 47 49 58 19 18 173 0 0 57 22 56 10 41 20 0 288 -24 57 5 19 57 40 36 56 37 16 58 9 0 Uncertainty in time = +/- 1 secs [Prediction of 2008 Mar 28.0] Data for the target star ------------------------ * name: TYC 0659-00050-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 03 57 56.1362 DE: +09 51 08.762 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .027, .020 ) * V mag [mag]: 11.3 * B mag [mag]: 12.3 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (679) Pax approx. diameter [km]: 52 approx. diameter ["]: .028 distance from Earth [AU]: 2.55600 * orbital information: orbit source: Preston date of fit: 2008 Mar 27 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 699 number of rejected observations: 66 time covered by the observations: 1909 Jan 29 - 2008 Jan 15 1 sigma uncertainty ellipse (major, minor, PA): 0.013, 0.008, 52° remarks: * orbital elements for (679) Pax : Mean anomaly = 32.42891106 deg Arg. of pericenter = 266.81602837 deg Long. of node = 112.31298566 deg Inclination = 24.38029764 deg Eccentricity = 0.31098025 Semimajor axis = 2.58704703 AU Perihelion dist = 1.78252651 AU Mag: H = 8.97, G = 0.15 Epoch of elements : MJD 54558.44400000 TDT (2008 Apr 02.444) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Apr 2 679 Pax 10h 39.3m UT 11.3 3 57 56.136 9 51 8.76TYC 0659-00050-1 12.3 13.6 52 1.2 2.556 5.166 36.18 68.5131 9.843 21.05 5.16 10.6548 -0.23392 0.49166 22.19770 10.52090 0.00393 0.00015 2000 30.4288382008 325.00000266.816028112.312986 24.3802980.31098025 2.5870470 1.7825265 9.0 5.00.15 RATE 2.3686320 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.030 0.021 83 1.80 0.022 0 54553.5020080402_0050-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 28, 06:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org