IOTA/IOTA-ES occultation update for (712) Boliviana / TYC 5702-02632-1 event on 2008 May 12, 19:56 UT Visible from N Australia, SE Asia, China, Russia Summary ------- On 2008 May 12 UT, the 128 km diameter asteroid (712) Boliviana will occult a 11.6 mag star in the constellation Scutum for observers along a path across N Australia, SE Asia, China, Russia. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.9 mag to 13.3 mag (the magnitude of the asteroid) for at most 16.4 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: . The event at a glimpse ---------------------- * Rank: 48 * date and approx. time of event: 2008 May 12, 19:47 - 2008 May 12, 20:09 UT * magnitude of target star: 11.6 * magnitude drop [mag]: 1.9 * estimated maximum duration [s]: 16.4 * Moon: 57 % sunlit, 126° distance * Sun: 135° distance * rough path description: N Australia, SE Asia, China, Russia The occultation path -------------------- * approximate projected width [km]: 137 * 1 sigma uncertainty interval [path widths]: +/- 1.34 * 1 sigma uncertainty interval [seconds]: +/- 21.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .080 +/- .134) * 1 sigma uncertainty ellipse (major, minor, PA): ( .134", .080", 360° ) * approx speed of asteroid's shadow [km/s]: 7.7897 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5702-02632-1 by 712 Boliviana on 2008 May 12 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 44 51 8 62 0 0 20 9 12 1 124 -9 47 11 34 42 24 44 53 4 52 ... .. .. 47 54 52 61 0 0 20 9 11 3 126 -10 50 4 38 45 40 35 55 34 25 ... .. .. Latitude Latitude Latitude Latitude 48 0 0 60 58 14 20 9 11 3 127 -10 61 43 48 60 12 55 63 47 24 58 12 46 49 0 0 60 37 9 20 9 10 4 127 -11 61 23 6 59 51 29 63 27 45 57 50 22 50 0 0 60 15 21 20 9 10 4 128 -11 61 1 41 59 29 18 63 7 23 57 27 13 51 0 0 59 52 47 20 9 9 5 129 -12 60 39 31 59 6 22 62 46 18 57 3 18 52 0 0 59 29 27 20 9 8 6 130 -12 60 16 35 58 42 39 62 24 28 56 38 35 53 0 0 59 5 20 20 9 7 6 131 -13 59 52 51 58 18 8 62 1 52 56 13 4 54 0 0 58 40 24 20 9 6 7 132 -13 59 28 19 57 52 48 61 38 28 55 46 42 55 0 0 58 14 38 20 9 4 8 133 -13 59 2 58 57 26 38 61 14 16 55 19 30 56 0 0 57 48 0 20 9 3 8 133 -14 58 36 45 56 59 36 60 49 13 54 51 25 57 0 0 57 20 30 20 9 1 9 134 -14 58 9 40 56 31 41 60 23 19 54 22 28 58 0 0 56 52 7 20 9 0 10 135 -15 57 41 42 56 2 53 59 56 31 53 52 36 59 0 0 56 22 48 20 8 58 11 136 -15 57 12 49 55 33 9 59 28 49 53 21 49 60 0 0 55 52 33 20 8 55 11 137 -16 56 42 59 55 2 29 59 0 12 52 50 5 61 0 0 55 21 20 20 8 53 12 138 -16 56 12 12 54 30 52 58 30 37 52 17 23 62 0 0 54 49 9 20 8 51 13 138 -17 55 40 26 53 58 15 58 0 4 51 43 43 63 0 0 54 15 58 20 8 48 14 139 -17 55 7 41 53 24 39 57 28 30 51 9 4 64 0 0 53 41 46 20 8 45 14 140 -18 54 33 54 52 50 3 56 55 56 50 33 24 65 0 0 53 6 32 20 8 42 15 141 -18 53 59 5 52 14 24 56 22 18 49 56 43 66 0 0 52 30 14 20 8 38 16 142 -19 53 23 13 51 37 43 55 47 37 49 18 59 67 0 0 51 52 54 20 8 34 17 143 -19 52 46 17 50 59 58 55 11 51 48 40 14 68 0 0 51 14 28 20 8 30 18 143 -20 52 8 16 50 21 9 54 34 59 48 0 24 69 0 0 50 34 57 20 8 26 19 144 -20 51 29 9 49 41 14 53 57 0 47 19 32 70 0 0 49 54 20 20 8 21 20 145 -21 50 48 55 49 0 15 53 17 52 46 37 35 71 0 0 49 12 36 20 8 16 21 146 -21 50 7 34 48 18 9 52 37 36 45 54 33 72 0 0 48 29 45 20 8 11 22 146 -22 49 25 5 47 34 57 51 56 10 45 10 28 73 0 0 47 45 48 20 8 6 23 147 -22 48 41 29 46 50 39 51 13 35 44 25 17 74 0 0 47 0 43 20 8 0 24 148 -23 47 56 44 46 5 14 50 29 48 43 39 3 75 0 0 46 14 31 20 7 53 25 149 -24 47 10 51 45 18 44 49 44 51 42 51 45 76 0 0 45 27 12 20 7 47 26 150 -24 46 23 51 44 31 7 48 58 44 42 3 24 77 0 0 44 38 47 20 7 40 27 150 -25 45 35 43 43 42 25 48 11 26 41 14 0 78 0 0 43 49 16 20 7 32 28 151 -25 44 46 28 42 52 39 47 22 58 40 23 34 79 0 0 42 58 40 20 7 24 29 152 -26 43 56 8 42 1 49 46 33 20 39 32 8 80 0 0 42 7 1 20 7 16 30 153 -26 43 4 42 41 9 56 45 42 34 38 39 43 81 0 0 41 14 19 20 7 7 31 154 -27 42 12 13 40 17 3 44 50 40 37 46 20 82 0 0 40 20 37 20 6 58 32 154 -27 41 18 41 39 23 10 43 57 40 36 52 0 83 0 0 39 25 55 20 6 48 33 155 -28 40 24 9 38 28 19 43 3 35 35 56 47 84 0 0 38 30 16 20 6 38 34 156 -28 39 28 38 37 32 33 42 8 27 35 0 41 85 0 0 37 33 43 20 6 28 36 157 -28 38 32 11 36 35 53 41 12 19 34 3 46 86 0 0 36 36 16 20 6 17 37 158 -29 37 34 49 35 38 22 40 15 11 33 6 3 87 0 0 35 38 0 20 6 6 38 158 -29 36 36 36 34 40 2 39 17 8 32 7 35 88 0 0 34 38 56 20 5 54 39 159 -30 35 37 34 33 40 56 38 18 11 31 8 25 89 0 0 33 39 7 20 5 41 40 160 -30 34 37 45 32 41 8 37 18 23 30 8 36 90 0 0 32 38 37 20 5 29 41 161 -30 33 37 14 31 40 39 36 17 49 29 8 11 91 0 0 31 37 30 20 5 15 43 162 -31 32 36 4 30 39 34 35 16 30 28 7 12 92 0 0 30 35 47 20 5 2 44 163 -31 31 34 17 29 37 55 34 14 30 27 5 44 93 0 0 29 33 33 20 4 48 45 164 -31 30 31 57 28 35 47 33 11 54 26 3 49 94 0 0 28 30 51 20 4 33 46 165 -32 29 29 8 27 33 12 32 8 45 25 1 32 95 0 0 27 27 45 20 4 18 48 166 -32 28 25 54 26 30 14 31 5 6 23 58 54 96 0 0 26 24 19 20 4 3 49 167 -32 27 22 17 25 26 57 30 1 1 22 56 1 97 0 0 25 20 36 20 3 47 50 168 -32 26 18 23 24 23 25 28 56 35 21 52 55 98 0 0 24 16 39 20 3 31 51 169 -32 25 14 15 23 19 40 27 51 51 20 49 40 99 0 0 23 12 34 20 3 15 52 170 -33 24 9 56 22 15 48 26 46 54 19 46 20 100 0 0 22 8 23 20 2 58 54 171 -33 23 5 30 21 11 51 25 41 47 18 42 58 101 0 0 21 4 10 20 2 42 55 173 -33 22 1 2 20 7 53 24 36 34 17 39 37 102 0 0 19 59 59 20 2 24 56 174 -33 20 56 35 19 3 57 23 31 19 16 36 21 103 0 0 18 55 53 20 2 7 57 176 -33 19 52 11 18 0 8 22 26 7 15 33 13 104 0 0 17 51 55 20 1 49 58 177 -33 18 47 56 16 56 28 21 21 0 14 30 16 105 0 0 16 48 10 20 1 31 59 179 -32 17 43 52 15 53 0 20 16 3 13 27 34 106 0 0 15 44 41 20 1 13 60 181 -32 16 40 3 14 49 49 19 11 19 12 25 10 107 0 0 14 41 29 20 0 55 61 183 -32 15 36 32 13 46 57 18 6 51 11 23 6 108 0 0 13 38 40 20 0 36 62 185 -32 14 33 22 12 44 27 17 2 42 10 21 26 109 0 0 12 36 15 20 0 18 63 187 -32 13 30 37 11 42 22 15 58 57 9 20 12 110 0 0 11 34 17 19 59 59 64 189 -32 12 28 18 10 40 45 14 55 38 8 19 26 111 0 0 10 32 49 19 59 40 65 192 -31 11 26 28 9 39 38 13 52 47 7 19 12 112 0 0 9 31 54 19 59 21 66 194 -31 10 25 11 8 39 4 12 50 28 6 19 31 113 0 0 8 31 33 19 59 2 67 197 -31 9 24 29 7 39 5 11 48 43 5 20 26 114 0 0 7 31 50 19 58 44 67 200 -30 8 24 24 6 39 43 10 47 35 4 21 59 115 0 0 6 32 46 19 58 25 68 203 -30 7 24 57 5 41 0 9 47 5 3 24 12 116 0 0 5 34 23 19 58 6 68 206 -29 6 26 12 4 42 59 8 47 16 2 27 6 117 0 0 4 36 43 19 57 47 69 209 -29 5 28 10 3 45 41 7 48 10 1 30 43 118 0 0 3 39 48 19 57 28 69 213 -29 4 30 52 2 49 8 6 49 49 0 35 6 119 0 0 2 43 39 19 57 10 69 216 -28 3 34 21 1 53 21 5 52 15 - 0 19 46 120 0 0 1 48 18 19 56 51 69 219 -28 2 38 37 0 58 21 4 55 28 - 1 13 49 121 0 0 0 53 46 19 56 33 70 223 -27 1 43 43 0 4 11 3 59 30 - 2 7 4 122 0 0 0 0 4 19 56 14 70 226 -26 0 49 38 - 0 49 10 3 4 24 - 2 59 29 123 0 0 - 0 52 47 19 55 56 69 230 -26 - 0 3 35 - 1 41 39 2 10 9 - 3 51 4 124 0 0 - 1 44 46 19 55 38 69 233 -25 - 0 55 55 - 2 33 17 1 16 47 - 4 41 46 125 0 0 - 2 35 52 19 55 20 69 236 -25 - 1 47 23 - 3 24 1 0 24 18 - 5 31 36 126 0 0 - 3 26 4 19 55 3 69 239 -24 - 2 37 56 - 4 13 52 - 0 27 16 - 6 20 33 127 0 0 - 4 15 21 19 54 45 68 242 -24 - 3 27 35 - 5 2 49 - 1 17 54 - 7 8 36 128 0 0 - 5 3 44 19 54 28 68 245 -23 - 4 16 19 - 5 50 51 - 2 7 37 - 7 55 45 129 0 0 - 5 51 11 19 54 11 67 247 -22 - 5 4 7 - 6 37 58 - 2 56 23 - 8 42 0 130 0 0 - 6 37 43 19 53 54 67 250 -22 - 5 50 59 - 7 24 10 - 3 44 13 - 9 27 19 131 0 0 - 7 23 19 19 53 37 66 252 -21 - 6 36 55 - 8 9 26 - 4 31 5 -10 11 44 132 0 0 - 8 7 58 19 53 21 65 254 -20 - 7 21 55 - 8 53 45 - 5 17 0 -10 55 13 133 0 0 - 8 51 41 19 53 5 65 256 -20 - 8 5 57 - 9 37 9 - 6 1 58 -11 37 47 134 0 0 - 9 34 28 19 52 49 64 258 -19 - 8 49 3 -10 19 37 - 6 45 58 -12 19 25 135 0 0 -10 16 18 19 52 33 63 259 -18 - 9 31 13 -11 1 8 - 7 29 0 -13 0 8 136 0 0 -10 57 12 19 52 17 62 261 -18 -10 12 25 -11 41 44 - 8 11 5 -13 39 56 137 0 0 -11 37 9 19 52 2 62 262 -17 -10 52 41 -12 21 23 - 8 52 12 -14 18 48 138 0 0 -12 16 11 19 51 47 61 263 -16 -11 32 0 -13 0 7 - 9 32 21 -14 56 45 139 0 0 -12 54 16 19 51 32 60 264 -15 -12 10 23 -13 37 54 -10 11 33 -15 33 48 140 0 0 -13 31 25 19 51 18 59 265 -15 -12 47 50 -14 14 47 -10 49 48 -16 9 56 141 0 0 -14 7 39 19 51 4 58 266 -14 -13 24 21 -14 50 44 -11 27 6 -16 45 9 142 0 0 -14 42 58 19 50 50 57 267 -13 -13 59 56 -15 25 46 -12 3 27 -17 19 29 143 0 0 -15 17 22 19 50 36 56 268 -13 -14 34 36 -15 59 54 -12 38 52 -17 52 55 144 0 0 -15 50 51 19 50 23 56 268 -12 -15 8 21 -16 33 7 -13 13 22 -18 25 27 145 0 0 -16 23 26 19 50 9 55 269 -11 -15 41 12 -17 5 27 -13 46 55 -18 57 7 146 0 0 -16 55 7 19 49 56 54 269 -10 -16 13 8 -17 36 53 -14 19 33 -19 27 54 147 0 0 -17 25 54 19 49 44 53 270 -10 -16 44 10 -18 7 26 -14 51 17 -19 57 48 148 0 0 -17 55 49 19 49 31 52 270 -9 -17 14 19 -18 37 6 -15 22 5 -20 26 51 149 0 0 -18 24 51 19 49 19 51 270 -8 -17 43 36 -19 5 54 -15 52 0 -20 55 3 150 0 0 -18 53 1 19 49 7 50 271 -7 -18 11 59 -19 33 51 -16 21 2 -21 22 24 151 0 0 -19 20 19 19 48 55 49 271 -7 -18 39 30 -20 0 55 -16 49 10 -21 48 54 152 0 0 -19 46 45 19 48 44 48 271 -6 -19 6 10 -20 27 9 -17 16 25 -22 14 35 153 0 0 -20 12 21 19 48 33 47 271 -5 -19 31 59 -20 52 33 -17 42 48 -22 39 26 154 0 0 -20 37 7 19 48 22 46 271 -5 -19 56 56 -21 17 6 -18 8 19 -23 3 28 155 0 0 -21 1 2 19 48 11 46 271 -4 -20 21 4 -21 40 50 -18 32 59 -23 26 41 156 0 0 -21 24 8 19 48 1 45 271 -3 -20 44 21 -22 3 45 -18 56 48 -23 49 6 157 0 0 -21 46 25 19 47 50 44 271 -2 -21 6 49 -22 25 51 -19 19 46 -24 10 43 158 0 0 -22 7 54 19 47 40 43 271 -2 -21 28 28 -22 47 9 -19 41 54 -24 31 33 159 0 0 -22 28 34 19 47 31 42 271 -1 -21 49 18 -23 7 39 -20 3 13 -24 51 37 160 0 0 -22 48 26 19 47 21 41 271 0 -22 9 21 -23 27 21 -20 23 42 -25 10 53 Uncertainty in time = +/- 27 secs [Prediction of 2008 May 8.0] Data for the target star ------------------------ * name: TYC 5702-02632-1 * constellation : Scutum * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 18 27 06.8118 DE: -13 56 37.308 * position source: mpos:TYC pm:TYC * standard error: RA,DE ["]: ( .078, .133 ) * V mag [mag]: 11.6 * B mag [mag]: 12.3 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (712) Boliviana approx. diameter [km]: 128 approx. diameter ["]: .082 distance from Earth [AU]: 2.15900 * orbital information: orbit source: Preston date of fit: 2008 May 07 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 760 number of rejected observations: 118 time covered by the observations: 1911 Mar 25 - 2008 Apr 27 1 sigma uncertainty ellipse (major, minor, PA): 0.017, 0.010, 78° remarks: * orbital elements for (712) Boliviana : Mean anomaly = 223.76132555 deg Arg. of pericenter = 181.17451220 deg Long. of node = 231.03660406 deg Inclination = 12.77080673 deg Eccentricity = 0.18680099 Semimajor axis = 2.57646653 AU Perihelion dist = 2.09518003 AU Mag: H = 8.40, G = 0.03 Epoch of elements : MJD 54598.83100000 TDT (2008 May 12.831) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 12 712 Boliviana 19h 56.4m UT 11.6 18 27 6.812-13 56 37.31TYC 5702-02632-1 12.3 13.3 128 16.4 2.159 -0.861 12.82 106.7100 -13.947 -120.02 18.39 19.9408 0.25006 0.24352 -3.07043 3.14699 -0.00390 -0.00085 2000 221.6566892008 5 4.00000181.174512231.036604 12.7708070.18680099 2.5764665 2.0951800 8.3 5.00.03 RATE 2.3832370 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.134 0.080 360 2.34 0.110 0 54594.5020080512_2632-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 May 08, 03:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org