IOTA/IOTA-ES occultation update for (701) Oriola / TYC 0246-00646-1 event on 2008 May 07, 09:30 UT Visible from E Australia Summary ------- On 2008 May 07 UT, the 40 km diameter asteroid (701) Oriola will occult a 10.2 mag star in the constellation Sextans for observers along a path across E Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.3 mag to 14.5 mag (the magnitude of the asteroid) for at most 5.8 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: 59 * date and approx. time of event: 2008 May 07, 09:22 - 2008 May 07, 09:45 UT * magnitude of target star: 10.2 * magnitude drop [mag]: 4.3 * estimated maximum duration [s]: 5.8 * Moon: 5 % sunlit, 85° distance * Sun: 111° distance * rough path description: E Australia The occultation path -------------------- * approximate projected width [km]: 43 * 1 sigma uncertainty interval [path widths]: +/- 1.05 * 1 sigma uncertainty interval [seconds]: +/- 6.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .027 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .027", .024", 100° ) * approx speed of asteroid's shadow [km/s]: 6.9055 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0246-00646-1 by 701 Oriola on 2008 May 7 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 121 0 0 -25 32 0 9 22 32 51 52 -1 -25 43 47 -25 20 14 -26 8 35 -24 55 33 122 0 0 -25 19 49 9 22 45 52 51 -2 -25 31 37 -25 8 3 -25 56 25 -24 43 22 123 0 0 -25 7 30 9 22 59 53 50 -2 -25 19 18 -24 55 43 -25 44 7 -24 31 2 124 0 0 -24 55 4 9 23 12 54 49 -3 -25 6 52 -24 43 17 -25 31 42 -24 18 34 125 0 0 -24 42 30 9 23 26 54 47 -4 -24 54 19 -24 30 43 -25 19 9 -24 5 59 126 0 0 -24 29 49 9 23 39 55 46 -5 -24 41 38 -24 18 1 -25 6 29 -23 53 17 127 0 0 -24 17 1 9 23 53 56 45 -6 -24 28 50 -24 5 13 -24 53 42 -23 40 28 128 0 0 -24 4 6 9 24 8 57 44 -7 -24 15 56 -23 52 18 -24 40 48 -23 27 33 129 0 0 -23 51 5 9 24 22 58 43 -8 -24 2 55 -23 39 16 -24 27 48 -23 14 31 130 0 0 -23 37 58 9 24 36 59 41 -8 -23 49 48 -23 26 9 -24 14 42 -23 1 22 131 0 0 -23 24 45 9 24 51 59 40 -9 -23 36 35 -23 12 55 -24 1 29 -22 48 8 132 0 0 -23 11 26 9 25 6 60 38 -10 -23 23 16 -22 59 36 -23 48 11 -22 34 48 133 0 0 -22 58 1 9 25 21 61 37 -11 -23 9 52 -22 46 11 -23 34 48 -22 21 23 134 0 0 -22 44 32 9 25 36 62 35 -12 -22 56 23 -22 32 42 -23 21 19 -22 7 53 135 0 0 -22 30 58 9 25 51 62 33 -13 -22 42 49 -22 19 7 -23 7 46 -21 54 18 136 0 0 -22 17 19 9 26 7 63 32 -14 -22 29 11 -22 5 29 -22 54 8 -21 40 39 137 0 0 -22 3 37 9 26 22 64 30 -15 -22 15 28 -21 51 46 -22 40 26 -21 26 56 138 0 0 -21 49 50 9 26 38 64 28 -16 -22 1 42 -21 37 59 -22 26 40 -21 13 9 139 0 0 -21 36 0 9 26 54 65 26 -17 -21 47 52 -21 24 9 -22 12 50 -20 59 18 140 0 0 -21 22 6 9 27 9 66 24 -18 -21 33 59 -21 10 15 -21 58 57 -20 45 24 141 0 0 -21 8 10 9 27 25 66 21 -18 -21 20 3 -20 56 19 -21 45 2 -20 31 27 142 0 0 -20 54 11 9 27 42 67 19 -19 -21 6 4 -20 42 20 -21 31 3 -20 17 28 143 0 0 -20 40 10 9 27 58 67 16 -20 -20 52 3 -20 28 19 -21 17 2 -20 3 27 144 0 0 -20 26 7 9 28 14 68 14 -21 -20 38 0 -20 14 16 -21 3 0 -19 49 24 145 0 0 -20 12 3 9 28 30 68 11 -22 -20 23 56 -20 0 11 -20 48 56 -19 35 19 146 0 0 -19 57 57 9 28 47 69 8 -23 -20 9 50 -19 46 5 -20 34 50 -19 21 13 147 0 0 -19 43 51 9 29 3 69 6 -24 -19 55 44 -19 31 59 -20 20 44 -19 7 6 148 0 0 -19 29 44 9 29 20 69 3 -25 -19 41 37 -19 17 52 -20 6 37 -18 52 59 149 0 0 -19 15 37 9 29 37 70 359 -26 -19 27 30 -19 3 44 -19 52 30 -18 38 52 150 0 0 -19 1 30 9 29 53 70 356 -27 -19 13 23 -18 49 37 -19 38 23 -18 24 45 151 0 0 -18 47 23 9 30 10 70 353 -28 -18 59 16 -18 35 31 -19 24 16 -18 10 38 152 0 0 -18 33 18 9 30 27 70 350 -29 -18 45 11 -18 21 26 -19 10 11 -17 56 33 153 0 0 -18 19 13 9 30 44 70 347 -30 -18 31 6 -18 7 21 -18 56 6 -17 42 29 154 0 0 -18 5 11 9 31 0 70 344 -31 -18 17 4 -17 53 19 -18 42 4 -17 28 26 155 0 0 -17 51 10 9 31 17 70 340 -32 -18 3 3 -17 39 18 -18 28 3 -17 14 26 156 0 0 -17 37 12 9 31 34 70 337 -33 -17 49 4 -17 25 20 -18 14 4 -17 0 28 157 0 0 -17 23 16 9 31 51 70 334 -34 -17 35 9 -17 11 24 -18 0 8 -16 46 33 158 0 0 -17 9 23 9 32 8 69 331 -35 -17 21 16 -16 57 32 -17 46 15 -16 32 40 159 0 0 -16 55 34 9 32 25 69 328 -36 -17 7 26 -16 43 43 -17 32 25 -16 18 52 160 0 0 -16 41 49 9 32 41 69 325 -37 -16 53 41 -16 29 57 -17 18 39 -16 5 7 161 0 0 -16 28 7 9 32 58 68 322 -38 -16 39 59 -16 16 16 -17 4 58 -15 51 26 162 0 0 -16 14 30 9 33 15 68 320 -39 -16 26 22 -16 2 40 -16 51 20 -15 37 49 163 0 0 -16 0 58 9 33 31 67 317 -40 -16 12 50 -15 49 8 -16 37 47 -15 24 18 164 0 0 -15 47 31 9 33 48 67 315 -41 -15 59 23 -15 35 41 -16 24 20 -15 10 52 165 0 0 -15 34 10 9 34 5 66 313 -41 -15 46 1 -15 22 20 -16 10 58 -14 57 31 166 0 0 -15 20 54 9 34 21 66 310 -42 -15 32 45 -15 9 4 -15 57 41 -14 44 16 167 0 0 -15 7 45 9 34 37 65 308 -43 -15 19 36 -14 55 55 -15 44 31 -14 31 7 168 0 0 -14 54 42 9 34 54 64 306 -44 -15 6 32 -14 42 52 -15 31 27 -14 18 5 169 0 0 -14 41 46 9 35 10 63 305 -45 -14 53 36 -14 29 56 -15 18 30 -14 5 10 170 0 0 -14 28 57 9 35 26 63 303 -46 -14 40 46 -14 17 7 -15 5 40 -13 52 21 171 0 0 -14 16 15 9 35 42 62 301 -47 -14 28 5 -14 4 26 -14 52 58 -13 39 41 172 0 0 -14 3 41 9 35 58 61 300 -48 -14 15 30 -13 51 53 -14 40 23 -13 27 8 173 0 0 -13 51 15 9 36 14 60 298 -49 -14 3 4 -13 39 27 -14 27 56 -13 14 43 174 0 0 -13 38 58 9 36 29 60 297 -50 -13 50 46 -13 27 10 -14 15 38 -13 2 26 175 0 0 -13 26 49 9 36 45 59 295 -51 -13 38 37 -13 15 1 -14 3 28 -12 50 18 176 0 0 -13 14 49 9 37 0 58 294 -52 -13 26 37 -13 3 2 -13 51 27 -12 38 19 177 0 0 -13 2 58 9 37 16 57 293 -53 -13 14 46 -12 51 11 -13 39 35 -12 26 30 178 0 0 -12 51 17 9 37 31 56 292 -54 -13 3 4 -12 39 30 -13 27 53 -12 14 50 179 0 0 -12 39 45 9 37 46 55 291 -55 -12 51 32 -12 27 59 -13 16 20 -12 3 19 180 0 0 -12 28 24 9 38 0 54 290 -56 -12 40 10 -12 16 38 -13 4 57 -11 51 59 -179 0 0 -12 17 13 9 38 15 53 289 -57 -12 28 59 -12 5 27 -12 53 45 -11 40 49 -178 0 0 -12 6 12 9 38 29 52 288 -58 -12 17 58 -11 54 27 -12 42 43 -11 29 49 -177 0 0 -11 55 22 9 38 43 52 287 -59 -12 7 7 -11 43 37 -12 31 52 -11 19 0 -176 0 0 -11 44 43 9 38 57 51 286 -60 -11 56 28 -11 32 59 -12 21 12 -11 8 22 -175 0 0 -11 34 15 9 39 11 50 286 -61 -11 46 0 -11 22 31 -12 10 43 -10 57 56 -174 0 0 -11 23 59 9 39 25 49 285 -62 -11 35 43 -11 12 15 -12 0 25 -10 47 41 -173 0 0 -11 13 54 9 39 38 48 284 -63 -11 25 38 -11 2 11 -11 50 19 -10 37 37 -172 0 0 -11 4 1 9 39 51 47 284 -64 -11 15 45 -10 52 18 -11 40 25 -10 27 45 -171 0 0 -10 54 20 9 40 4 46 283 -65 -11 6 3 -10 42 38 -11 30 43 -10 18 6 -170 0 0 -10 44 51 9 40 17 45 282 -66 -10 56 34 -10 33 9 -11 21 13 -10 8 38 -169 0 0 -10 35 35 9 40 30 44 282 -67 -10 47 17 -10 23 53 -11 11 56 - 9 59 23 -168 0 0 -10 26 31 9 40 42 43 281 -68 -10 38 13 -10 14 50 -11 2 51 - 9 50 20 -167 0 0 -10 17 40 9 40 54 42 281 -69 -10 29 22 -10 5 59 -10 53 58 - 9 41 31 -166 0 0 -10 9 2 9 41 6 41 280 -70 -10 20 44 - 9 57 22 -10 45 19 - 9 32 54 -165 0 0 -10 0 37 9 41 17 40 280 -70 -10 12 18 - 9 48 57 -10 36 53 - 9 24 30 -164 0 0 - 9 52 25 9 41 29 39 279 -71 -10 4 6 - 9 40 46 -10 28 40 - 9 16 19 -163 0 0 - 9 44 27 9 41 40 38 279 -72 - 9 56 7 - 9 32 47 -10 20 40 - 9 8 22 -162 0 0 - 9 36 42 9 41 50 37 279 -73 - 9 48 21 - 9 25 3 -10 12 54 - 9 0 38 -161 0 0 - 9 29 10 9 42 1 36 278 -74 - 9 40 50 - 9 17 31 -10 5 21 - 8 53 7 -160 0 0 - 9 21 52 9 42 11 35 278 -75 - 9 33 31 - 9 10 14 - 9 58 3 - 8 45 50 -159 0 0 - 9 14 48 9 42 21 34 278 -76 - 9 26 27 - 9 3 10 - 9 50 57 - 8 38 47 -158 0 0 - 9 7 58 9 42 31 33 277 -76 - 9 19 37 - 8 56 21 - 9 44 6 - 8 31 58 -157 0 0 - 9 1 22 9 42 41 32 277 -77 - 9 13 0 - 8 49 45 - 9 37 29 - 8 25 23 -156 0 0 - 8 55 0 9 42 50 31 277 -78 - 9 6 38 - 8 43 23 - 9 31 6 - 8 19 2 -155 0 0 - 8 48 52 9 42 59 30 276 -78 - 9 0 30 - 8 37 16 - 9 24 57 - 8 12 55 -154 0 0 - 8 42 59 9 43 7 29 276 -79 - 8 54 36 - 8 31 22 - 9 19 3 - 8 7 3 -153 0 0 - 8 37 19 9 43 16 28 276 -80 - 8 48 56 - 8 25 43 - 9 13 22 - 8 1 24 -152 0 0 - 8 31 54 9 43 24 27 276 -80 - 8 43 31 - 8 20 19 - 9 7 57 - 7 56 1 -151 0 0 - 8 26 44 9 43 32 26 275 -80 - 8 38 20 - 8 15 9 - 9 2 45 - 7 50 51 -150 0 0 - 8 21 48 9 43 39 25 275 -81 - 8 33 24 - 8 10 13 - 8 57 48 - 7 45 56 -149 0 0 - 8 17 7 9 43 46 24 275 -81 - 8 28 42 - 8 5 32 - 8 53 6 - 7 41 15 -148 0 0 - 8 12 40 9 43 53 23 275 -81 - 8 24 15 - 8 1 5 - 8 48 38 - 7 36 49 -147 0 0 - 8 8 27 9 44 0 22 274 -81 - 8 20 3 - 7 56 53 - 8 44 25 - 7 32 38 -146 0 0 - 8 4 30 9 44 6 21 274 -81 - 8 16 5 - 7 52 56 - 8 40 27 - 7 28 41 -145 0 0 - 8 0 47 9 44 12 20 274 -81 - 8 12 22 - 7 49 13 - 8 36 43 - 7 24 58 -144 0 0 - 7 57 19 9 44 18 19 274 -80 - 8 8 53 - 7 45 45 - 8 33 14 - 7 21 31 -143 0 0 - 7 54 5 9 44 23 18 274 -80 - 8 5 39 - 7 42 31 - 8 30 0 - 7 18 18 -142 0 0 - 7 51 6 9 44 29 17 274 -80 - 8 2 40 - 7 39 33 - 8 27 1 - 7 15 19 -141 0 0 - 7 48 22 9 44 33 16 273 -79 - 7 59 56 - 7 36 49 - 8 24 16 - 7 12 36 -140 0 0 - 7 45 52 9 44 38 15 273 -78 - 7 57 26 - 7 34 19 - 8 21 46 - 7 10 7 -139 0 0 - 7 43 37 9 44 42 14 273 -78 - 7 55 11 - 7 32 5 - 8 19 30 - 7 7 52 -138 0 0 - 7 41 37 9 44 46 13 273 -77 - 7 53 10 - 7 30 4 - 8 17 29 - 7 5 53 -137 0 0 - 7 39 51 9 44 50 12 273 -76 - 7 51 25 - 7 28 19 - 8 15 43 - 7 4 8 -136 0 0 - 7 38 21 9 44 53 11 273 -76 - 7 49 54 - 7 26 48 - 8 14 12 - 7 2 37 -135 0 0 - 7 37 4 9 44 56 10 272 -75 - 7 48 37 - 7 25 32 - 8 12 55 - 7 1 21 -134 0 0 - 7 36 2 9 44 59 9 272 -74 - 7 47 35 - 7 24 30 - 8 11 53 - 7 0 20 -133 0 0 - 7 35 15 9 45 1 8 272 -73 - 7 46 48 - 7 23 43 - 8 11 6 - 6 59 33 -132 0 0 - 7 34 42 9 45 4 7 272 -72 - 7 46 15 - 7 23 10 - 8 10 33 - 6 59 0 -131 0 0 - 7 34 24 9 45 5 6 272 -72 - 7 45 57 - 7 22 52 - 8 10 14 - 6 58 42 -130 0 0 - 7 34 20 9 45 7 5 272 -71 - 7 45 53 - 7 22 48 - 8 10 10 - 6 58 38 -129 0 0 - 7 34 30 9 45 8 4 272 -70 - 7 46 3 - 7 22 59 - 8 10 20 - 6 58 49 -128 0 0 - 7 34 55 9 45 9 3 271 -69 - 7 46 28 - 7 23 23 - 8 10 45 - 6 59 14 -127 0 0 - 7 35 34 9 45 10 2 271 -68 - 7 47 7 - 7 24 2 - 8 11 23 - 6 59 53 -126 0 0 - 7 36 27 9 45 10 1 271 -67 - 7 48 0 - 7 24 56 - 8 12 16 - 7 0 46 Uncertainty in time = +/- 7 secs [Prediction of 2008 Apr 23.0] Data for the target star ------------------------ * name: TYC 0246-00646-1 * constellation : Sextans * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 10 26 49.4933 DE: +01 09 54.034 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .020 ) * V mag [mag]: 10.2 * B mag [mag]: 10.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (701) Oriola approx. diameter [km]: 40 approx. diameter ["]: .023 distance from Earth [AU]: 2.41200 * orbital information: orbit source: Preston date of fit: 2008 Apr 22 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 884 number of rejected observations: 98 time covered by the observations: 1906 Oct 11 - 2008 Apr 05 1 sigma uncertainty ellipse (major, minor, PA): 0.019, 0.013, 111° remarks: * orbital elements for (701) Oriola : Mean anomaly = 339.70155731 deg Arg. of pericenter = 314.22718712 deg Long. of node = 244.13473512 deg Inclination = 7.11346890 deg Eccentricity = 0.03122520 Semimajor axis = 3.01432257 AU Perihelion dist = 2.92019974 AU Mag: H = 9.19, G = 0.15 Epoch of elements : MJD 54593.39600000 TDT (2008 May 07.396) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 7 701 Oriola 9h 30.7m UT 10.2 10 26 49.493 1 9 54.03TYC 0246-00646-1 10.5 14.5 40 5.8 2.412 0.927 3.01 148.4366 1.164 36.47 16.97 9.5113 0.07082 -0.33146 3.80888 0.82704 0.00506 -0.00171 2000 339.0619882008 5 4.00000314.227187244.134735 7.1134690.03122520 3.0143226 2.9201997 9.3 5.00.15 RATE 1.8833000 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.027 0.024 100 2.05 0.024 0 54579.5020080507_0646-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 23, 04:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org