IOTA/IOTA-ES occultation update for (255) Oppavia / TYC 2448-00546-1 event on 2008 Feb 01, 12:02 UT Visible from Australia Summary ------- On 2008 Feb 01 UT, the 57 km diameter asteroid (255) Oppavia will occult a 10.4 mag star in the constellation Auriga for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.9 mag to 14.3 mag (the magnitude of the asteroid) for at most 6.8 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: 89 * date and approx. time of event: 2008 Feb 01, 11:51 - 2008 Feb 01, 12:11 UT * magnitude of target star: 10.4 * magnitude drop [mag]: 3.9 * estimated maximum duration [s]: 6.8 * Moon: 29 % sunlit, 145° distance * Sun: 146° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 74 * 1 sigma uncertainty interval [path widths]: +/- 0.55 * 1 sigma uncertainty interval [seconds]: +/- 3.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .031 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .031", .024", 92° ) * approx speed of asteroid's shadow [km/s]: 8.3425 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2448-00546-1 by 255 Oppavia on 2008 Feb 01 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 ' " Longitude Longitude Longitude Longitude 102 5 5 -42 0 0 12 11 36 0 36 3 ... .. .. 102 38 46 ... .. .. 103 15 56 103 2 43 -41 0 0 12 11 36 1 35 2 102 29 28 103 36 4 ... .. .. 104 12 53 104 0 23 -40 0 0 12 11 35 3 34 1 103 27 26 104 33 27 ... .. .. 105 9 57 104 58 12 -39 0 0 12 11 34 4 34 0 104 25 31 105 31 0 ... .. .. 106 7 12 105 56 11 -38 0 0 12 11 32 5 33 -1 105 23 45 106 28 45 104 48 11 107 4 42 106 54 26 -37 0 0 12 11 30 6 33 -2 106 22 12 107 26 48 105 46 52 108 2 32 107 53 0 -36 0 0 12 11 28 8 32 -3 107 20 57 108 25 11 106 45 49 109 0 43 108 51 56 -35 0 0 12 11 25 9 31 -4 108 20 2 109 23 58 107 45 6 109 59 21 109 51 19 -34 0 0 12 11 21 10 31 -6 109 19 33 110 23 14 108 44 45 110 58 29 110 51 13 -33 0 0 12 11 17 11 30 -7 110 19 33 111 23 1 109 44 52 111 58 10 111 51 41 -32 0 0 12 11 12 13 30 -8 111 20 5 112 23 25 110 45 30 112 58 30 112 52 47 -31 0 0 12 11 7 14 29 -9 112 21 14 113 24 29 111 46 42 113 59 31 113 54 36 -30 0 0 12 11 1 15 29 -10 113 23 4 114 26 17 112 48 34 115 1 18 114 57 11 -29 0 0 12 10 55 17 28 -12 114 25 40 115 28 53 113 51 9 116 3 56 116 0 38 -28 0 0 12 10 48 18 27 -13 115 29 4 116 32 22 114 54 32 117 7 29 117 5 1 -27 0 0 12 10 41 19 27 -14 116 33 23 117 36 50 115 58 47 118 12 1 118 10 25 -26 0 0 12 10 33 20 26 -15 117 38 41 118 42 20 117 3 59 119 17 39 119 16 55 -25 0 0 12 10 24 22 25 -17 118 45 4 119 48 58 118 10 14 120 24 27 120 24 38 -24 0 0 12 10 15 23 25 -18 119 52 36 120 56 51 119 17 36 121 32 32 121 33 38 -23 0 0 12 10 5 24 24 -20 121 1 25 122 6 3 120 26 12 122 41 59 122 44 2 -22 0 0 12 9 55 26 23 -21 122 11 35 123 16 43 121 36 8 123 52 55 123 55 59 -21 0 0 12 9 43 27 23 -22 123 23 15 124 28 57 122 47 30 125 5 29 125 9 34 -20 0 0 12 9 31 28 22 -24 124 36 31 125 42 53 124 0 26 126 19 49 126 24 58 -19 0 0 12 9 19 30 21 -25 125 51 32 126 58 40 125 15 4 127 36 3 127 42 20 -18 0 0 12 9 5 31 20 -27 127 8 28 128 16 28 126 31 33 128 54 22 129 1 50 -17 0 0 12 8 51 33 20 -28 128 27 29 129 36 29 127 50 3 130 14 58 130 23 40 -16 0 0 12 8 36 34 19 -30 129 48 46 130 58 54 129 10 45 131 38 3 131 48 5 -15 0 0 12 8 20 35 18 -32 131 12 33 132 23 58 130 33 51 133 3 52 133 15 19 -14 0 0 12 8 3 37 17 -33 132 39 4 133 51 57 131 59 37 134 32 44 134 45 41 -13 0 0 12 7 45 38 15 -35 134 8 37 135 23 11 133 28 18 136 4 57 136 19 33 -12 0 0 12 7 27 39 14 -37 135 41 32 136 58 2 135 0 14 137 40 56 137 57 18 -11 0 0 12 7 7 41 13 -39 137 18 13 138 36 56 136 35 46 139 21 9 139 39 29 -10 0 0 12 6 45 42 11 -40 138 59 8 140 20 25 138 15 23 141 6 10 141 26 40 - 9 0 0 12 6 23 43 10 -42 140 44 51 142 9 10 139 59 35 142 56 43 143 19 40 - 8 0 0 12 5 58 44 8 -44 142 36 7 144 3 59 141 49 4 144 53 42 145 19 25 - 7 0 0 12 5 33 46 6 -46 144 33 48 146 5 56 143 44 37 146 58 15 147 27 12 - 6 0 0 12 5 5 47 4 -49 146 39 4 148 16 26 145 47 19 149 11 58 Latitude Latitude Latitude Latitude 148 0 0 - 5 45 16 12 4 58 47 3 -49 - 5 23 20 - 6 7 19 - 4 59 22 - 6 31 44 149 0 0 - 5 19 0 12 4 45 48 2 -50 - 4 57 13 - 5 40 56 - 4 33 23 - 6 5 11 150 0 0 - 4 53 38 12 4 31 48 1 -51 - 4 31 58 - 5 15 26 - 4 8 17 - 5 39 33 151 0 0 - 4 29 10 12 4 18 48 360 -52 - 4 7 37 - 4 50 50 - 3 44 3 - 5 14 49 152 0 0 - 4 5 35 12 4 5 49 359 -53 - 3 44 9 - 4 27 8 - 3 20 43 - 4 50 58 153 0 0 - 3 42 52 12 3 52 49 358 -54 - 3 21 33 - 4 4 18 - 2 58 14 - 4 28 1 154 0 0 - 3 21 2 12 3 39 49 356 -55 - 2 59 49 - 3 42 22 - 2 36 37 - 4 5 58 155 0 0 - 3 0 4 12 3 25 50 355 -56 - 2 38 57 - 3 21 17 - 2 15 52 - 3 44 46 156 0 0 - 2 39 58 12 3 12 50 354 -57 - 2 18 57 - 3 1 5 - 1 55 58 - 3 24 27 157 0 0 - 2 20 43 12 2 59 50 353 -58 - 1 59 47 - 2 41 45 - 1 36 54 - 3 5 0 158 0 0 - 2 2 19 12 2 46 50 352 -59 - 1 41 29 - 2 23 15 - 1 18 41 - 2 46 25 159 0 0 - 1 44 46 12 2 33 50 350 -60 - 1 24 1 - 2 5 37 - 1 1 19 - 2 28 42 160 0 0 - 1 28 4 12 2 20 51 349 -61 - 1 7 24 - 1 48 50 - 0 44 47 - 2 11 49 161 0 0 - 1 12 12 12 2 7 51 348 -62 - 0 51 36 - 1 32 54 - 0 29 4 - 1 55 47 162 0 0 - 0 57 10 12 1 53 51 347 -63 - 0 36 38 - 1 17 47 - 0 14 11 - 1 40 36 163 0 0 - 0 42 58 12 1 40 51 346 -63 - 0 22 30 - 1 3 31 - 0 0 7 - 1 26 16 164 0 0 - 0 29 35 12 1 28 51 344 -64 - 0 9 11 - 0 50 5 0 13 8 - 1 12 45 165 0 0 - 0 17 2 12 1 15 51 343 -65 0 3 19 - 0 37 28 0 25 34 - 1 0 4 166 0 0 - 0 5 18 12 1 2 50 342 -66 0 14 59 - 0 25 41 0 37 11 - 0 48 13 167 0 0 0 5 37 12 0 49 50 341 -67 0 25 52 - 0 14 43 0 48 0 - 0 37 12 168 0 0 0 15 44 12 0 36 50 340 -67 0 35 55 - 0 4 33 0 58 1 - 0 26 59 169 0 0 0 25 1 12 0 24 50 339 -68 0 45 10 0 4 47 1 7 13 - 0 17 36 170 0 0 0 33 31 12 0 11 50 337 -69 0 53 37 0 13 18 1 15 38 - 0 9 2 171 0 0 0 41 11 11 59 58 50 336 -69 1 1 16 0 21 1 1 23 14 - 0 1 17 172 0 0 0 48 4 11 59 46 49 335 -70 1 8 7 0 27 55 1 30 3 0 5 39 173 0 0 0 54 8 11 59 33 49 334 -71 1 14 9 0 34 1 1 36 4 0 11 47 174 0 0 0 59 25 11 59 21 49 333 -71 1 19 24 0 39 19 1 41 18 0 17 6 175 0 0 1 3 53 11 59 9 48 332 -72 1 23 52 0 43 48 1 45 44 0 21 37 176 0 0 1 7 33 11 58 57 48 331 -72 1 27 31 0 47 29 1 49 22 0 25 19 177 0 0 1 10 25 11 58 44 47 331 -73 1 30 22 0 50 22 1 52 13 0 28 12 178 0 0 1 12 29 11 58 32 47 330 -73 1 32 26 0 52 27 1 54 16 0 30 17 179 0 0 1 13 46 11 58 21 46 329 -73 1 33 42 0 53 43 1 55 32 0 31 34 180 0 0 1 14 14 11 58 9 46 328 -74 1 34 11 0 54 12 1 56 1 0 32 2 -179 0 0 1 13 54 11 57 57 45 327 -74 1 33 51 0 53 51 1 55 41 0 31 42 -178 0 0 1 12 46 11 57 45 45 326 -74 1 32 44 0 52 43 1 54 35 0 30 33 -177 0 0 1 10 50 11 57 34 44 326 -74 1 30 48 0 50 46 1 52 40 0 28 35 -176 0 0 1 8 5 11 57 22 44 325 -74 1 28 5 0 48 0 1 49 58 0 25 48 -175 0 0 1 4 33 11 57 11 43 324 -74 1 24 33 0 44 26 1 46 27 0 22 12 -174 0 0 1 0 11 11 57 0 43 324 -74 1 20 13 0 40 3 1 42 9 0 17 48 -173 0 0 0 55 1 11 56 49 42 323 -73 1 15 4 0 34 51 1 37 2 0 12 33 -172 0 0 0 49 1 11 56 38 41 322 -73 1 9 7 0 28 50 1 31 7 0 6 30 -171 0 0 0 42 13 11 56 27 41 322 -73 1 2 21 0 21 59 1 24 23 - 0 0 23 -170 0 0 0 34 35 11 56 16 40 321 -72 0 54 46 0 14 19 1 16 50 - 0 8 6 -169 0 0 0 26 8 11 56 5 39 321 -72 0 46 21 0 5 49 1 8 29 - 0 16 39 -168 0 0 0 16 51 11 55 55 38 320 -72 0 37 7 - 0 3 32 0 59 18 - 0 26 3 -167 0 0 0 6 43 11 55 45 38 320 -71 0 27 3 - 0 13 42 0 49 17 - 0 36 17 -166 0 0 - 0 4 14 11 55 34 37 319 -70 0 16 8 - 0 24 43 0 38 27 - 0 47 22 -165 0 0 - 0 16 3 11 55 24 36 319 -70 0 4 24 - 0 36 36 0 26 46 - 0 59 19 -164 0 0 - 0 28 42 11 55 14 35 318 -69 - 0 8 12 - 0 49 19 0 14 15 - 1 12 7 -163 0 0 - 0 42 13 11 55 5 35 318 -68 - 0 21 38 - 1 2 54 0 0 53 - 1 25 47 -162 0 0 - 0 56 36 11 54 55 34 318 -68 - 0 35 56 - 1 17 22 - 0 13 20 - 1 40 20 -161 0 0 - 1 11 51 11 54 46 33 317 -67 - 0 51 6 - 1 32 41 - 0 28 25 - 1 55 45 -160 0 0 - 1 27 58 11 54 37 32 317 -66 - 1 7 9 - 1 48 54 - 0 44 22 - 2 12 3 -159 0 0 - 1 44 58 11 54 27 31 316 -65 - 1 24 3 - 2 6 0 - 1 1 11 - 2 29 15 -158 0 0 - 2 2 52 11 54 19 30 316 -64 - 1 41 51 - 2 23 59 - 1 18 52 - 2 47 21 -157 0 0 - 2 21 39 11 54 10 29 316 -63 - 2 0 33 - 2 42 53 - 1 37 27 - 3 6 22 -156 0 0 - 2 41 21 11 54 1 29 316 -63 - 2 20 8 - 3 2 41 - 1 56 56 - 3 26 17 -155 0 0 - 3 1 58 11 53 53 28 315 -62 - 2 40 38 - 3 23 24 - 2 17 19 - 3 47 8 -154 0 0 - 3 23 30 11 53 45 27 315 -61 - 3 2 3 - 3 45 3 - 2 38 36 - 4 8 55 -153 0 0 - 3 45 57 11 53 37 26 315 -60 - 3 24 23 - 4 7 38 - 3 0 49 - 4 31 38 -152 0 0 - 4 9 21 11 53 29 25 314 -59 - 3 47 40 - 4 31 10 - 3 23 57 - 4 55 18 -151 0 0 - 4 33 42 11 53 22 24 314 -58 - 4 11 52 - 4 55 39 - 3 48 1 - 5 19 56 -150 0 0 - 4 59 0 11 53 15 23 314 -57 - 4 37 2 - 5 21 5 - 4 13 2 - 5 45 32 -149 0 0 - 5 25 16 11 53 8 22 314 -56 - 5 3 9 - 5 47 30 - 4 39 0 - 6 12 7 -148 0 0 - 5 52 30 11 53 1 21 314 -55 - 5 30 15 - 6 14 53 - 5 5 55 - 6 39 41 -147 0 0 - 6 20 43 11 52 55 20 313 -54 - 5 58 19 - 6 43 16 - 5 33 49 - 7 8 14 -146 0 0 - 6 49 56 11 52 49 19 313 -53 - 6 27 22 - 7 12 39 - 6 2 41 - 7 37 48 -145 0 0 - 7 20 9 11 52 43 18 313 -52 - 6 57 25 - 7 43 2 - 6 32 33 - 8 8 23 -144 0 0 - 7 51 23 11 52 37 17 313 -51 - 7 28 28 - 8 14 27 - 7 3 25 - 8 40 0 -143 0 0 - 8 23 38 11 52 32 16 312 -50 - 8 0 31 - 8 46 53 - 7 35 17 - 9 12 38 -142 0 0 - 8 56 54 11 52 27 14 312 -48 - 8 33 36 - 9 20 21 - 8 8 10 - 9 46 20 -141 0 0 - 9 31 13 11 52 22 13 312 -47 - 9 7 43 - 9 54 52 - 8 42 4 -10 21 4 -140 0 0 -10 6 34 11 52 18 12 312 -46 - 9 42 53 -10 30 26 - 9 17 0 -10 56 52 -139 0 0 -10 42 59 11 52 14 11 312 -45 -10 19 5 -11 7 4 - 9 52 58 -11 33 45 -138 0 0 -11 20 28 11 52 10 10 311 -44 -10 56 20 -11 44 46 -10 29 59 -12 11 42 -137 0 0 -11 59 0 11 52 7 9 311 -43 -11 34 39 -12 23 32 -11 8 3 -12 50 44 -136 0 0 -12 38 37 11 52 4 8 311 -42 -12 14 2 -13 3 24 -11 47 11 -13 30 52 -135 0 0 -13 19 19 11 52 2 7 311 -40 -12 54 29 -13 44 21 -12 27 23 -14 12 6 -134 0 0 -14 1 6 11 52 0 5 310 -39 -13 36 1 -14 26 23 -13 8 39 -14 54 26 -133 0 0 -14 43 59 11 51 58 4 310 -38 -14 18 38 -15 9 32 .. .. .. -15 37 52 -132 0 0 -15 27 57 11 51 57 3 310 -37 -15 2 20 -15 53 47 .. .. .. -16 22 26 -131 0 0 -16 13 2 11 51 56 2 310 -36 -15 47 8 -16 39 8 .. .. .. -17 8 6 -130 0 0 -16 59 11 11 51 55 1 309 -34 .. .. .. -17 25 35 .. .. .. .. .. .. Data for the target star ------------------------ * name: TYC 2448-00546-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 51 33.3526 DE: +37 10 45.090 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .015, .017 ) * V mag [mag]: 10.4 * B mag [mag]: 10.7 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (255) Oppavia approx. diameter [km]: 57 approx. diameter ["]: .045 distance from Earth [AU]: 1.73200 * orbital information: orbit source: Preston date of fit: 2008 Jan 17 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 843 number of rejected observations: 73 time covered by the observations: 1904 Mar 15 - 2008 Jan 15 1 sigma uncertainty ellipse (major, minor, PA): 0.027, 0.017, 93° remarks: * orbital elements for (255) Oppavia : Mean anomaly = 312.46847638 deg Arg. of pericenter = 152.94980580 deg Long. of node = 13.76498342 deg Inclination = 9.48372775 deg Eccentricity = 0.08012370 Semimajor axis = 2.74559986 AU Perihelion dist = 2.52561223 AU Mag: H = 10.21, G = 0.15 Epoch of elements : MJD 54497.50200000 TDT (2008 Feb 01.502) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Feb 01 255 Oppavia 12h 1.8m UT 10.4 6 51 33.353 37 10 45.09TYC 2448-00546-1 10.7 14.3 57 6.8 1.732 -1.905 -7.22 -208.631 37.180 2.94 -17.19 12.0295 .19156 -.60425 -4.48897 -1.42175 0.00291 -0.00151 2000 310.8432062008 125.00000152.949806 13.764983 9.4837280.080123702.745599862.5256122310.35 0.15 RATE 2.1664480 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.031 0.024 92.3 1.550 0.025 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 17, 18:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org