IOTA/IOTA-ES occultation update for (93) Minerva / TYC 7354-00933-1 event on 2008 May 12, 02:13 UT Visible from Europe Summary ------- On 2008 May 12 UT, the 157 km diameter asteroid (93) Minerva will occult a 10.9 mag star in the constellation Scorpius for observers along a path across Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.9 mag to 11.1 mag (the magnitude of the asteroid) for at most 20.3 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 May 12, 02:06 - 2008 May 12, 02:19 UT * magnitude of target star: 10.9 * magnitude drop [mag]: 0.9 * estimated maximum duration [s]: 20.3 * Moon: 49 % sunlit, 112° distance * Sun: 155° distance * rough path description: Europe The occultation path -------------------- * approximate projected width [km]: 334 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 3.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .034 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .034", .027", 96° ) * approx speed of asteroid's shadow [km/s]: 7.7419 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7354-00933-1 by 93 Minerva 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 5 36 24 54 0 0 2 6 27 0 194 -11 2 48 51 ... .. .. 1 42 57 ... .. .. 5 10 3 53 0 0 2 6 27 1 193 -12 2 25 4 7 47 50 1 20 11 ... .. .. 4 41 12 52 0 0 2 6 28 2 193 -13 1 58 28 7 16 49 0 54 28 ... .. .. 4 9 55 51 0 0 2 6 29 3 193 -14 1 29 7 6 43 38 0 25 52 7 40 25 3 36 13 50 0 0 2 6 32 4 192 -15 0 57 5 6 8 18 - 0 5 32 7 4 29 3 0 9 49 0 0 2 6 34 5 192 -16 0 22 24 5 30 51 - 0 39 41 6 26 30 2 21 44 48 0 0 2 6 38 7 191 -17 - 0 14 55 4 51 17 - 1 16 36 5 46 29 1 40 58 47 0 0 2 6 42 8 191 -18 - 0 54 52 4 9 37 - 1 56 15 5 4 27 0 57 49 46 0 0 2 6 47 9 190 -19 - 1 37 28 3 25 48 - 2 38 41 4 20 22 0 12 15 45 0 0 2 6 52 10 189 -20 - 2 22 45 2 39 49 - 3 23 55 3 34 11 - 0 35 47 44 0 0 2 6 58 11 189 -21 - 3 10 48 1 51 36 - 4 12 2 2 45 53 - 1 26 21 43 0 0 2 7 5 12 188 -23 - 4 1 42 1 1 8 - 5 3 8 1 55 23 - 2 19 33 42 0 0 2 7 13 13 188 -24 - 4 55 32 0 8 18 - 5 57 18 1 2 38 - 3 15 29 41 0 0 2 7 22 14 187 -25 - 5 52 28 - 0 46 59 - 6 54 44 0 7 31 - 4 14 18 40 0 0 2 7 31 15 186 -26 - 6 52 39 - 1 44 51 - 7 55 36 - 0 50 3 - 5 16 10 39 0 0 2 7 41 16 185 -27 - 7 56 20 - 2 45 24 - 9 0 8 - 1 50 13 - 6 21 17 38 0 0 2 7 53 17 184 -29 - 9 3 45 - 3 48 50 - 10 8 38 - 2 53 8 - 7 29 55 37 0 0 2 8 5 18 183 -30 - 10 15 14 - 4 55 21 - 11 21 27 - 3 58 59 - 8 42 21 36 0 0 2 8 18 19 182 -31 - 11 31 11 - 6 5 11 - 12 39 4 - 5 8 0 - 9 58 58 35 0 0 2 8 33 20 181 -33 - 12 52 7 - 7 18 36 - 14 2 3 - 6 20 25 - 11 20 14 34 0 0 2 8 49 21 180 -34 - 14 18 40 - 8 35 59 - 15 31 9 - 7 36 36 - 12 46 44 33 0 0 2 9 6 22 179 -35 - 15 51 42 - 9 57 45 - 17 7 21 - 8 56 53 - 14 19 12 32 0 0 2 9 25 23 178 -37 - 17 32 18 - 11 24 26 - 18 52 0 - 10 21 48 - 15 58 37 31 0 0 2 9 46 24 176 -38 - 19 22 3 - 12 56 43 - 20 47 2 - 11 51 54 - 17 46 18 30 0 0 2 10 9 25 175 -40 - 21 23 12 - 14 35 27 - 22 55 21 - 13 27 59 - 19 44 7 29 0 0 2 10 34 26 173 -41 - 23 39 14 - 16 21 50 - 25 21 38 - 15 11 1 - 21 54 49 28 0 0 2 11 2 27 171 -43 - 26 16 3 - 18 17 26 - 28 14 39 - 17 2 22 Latitude Latitude Latitude Latitude - 23 0 0 27 32 34 2 11 16 27 170 -43 29 16 32 25 54 48 29 57 57 25 19 3 - 24 0 0 27 8 43 2 11 29 27 169 -44 28 51 30 25 31 57 29 32 24 24 56 32 - 25 0 0 26 46 13 2 11 42 27 168 -44 28 27 54 25 10 22 29 8 20 24 35 16 - 26 0 0 26 25 2 2 11 55 28 167 -45 28 5 42 24 50 2 28 45 42 24 15 12 - 27 0 0 26 5 9 2 12 8 28 167 -45 27 44 53 24 30 55 28 24 28 23 56 22 - 28 0 0 25 46 32 2 12 21 28 166 -46 27 25 25 24 13 1 28 4 38 23 38 42 - 29 0 0 25 29 10 2 12 34 28 165 -46 27 7 17 23 56 19 27 46 10 23 22 14 - 30 0 0 25 13 4 2 12 47 28 164 -47 26 50 28 23 40 48 27 29 2 23 6 56 - 31 0 0 24 58 11 2 13 0 28 163 -47 26 34 57 23 26 28 27 13 15 22 52 47 - 32 0 0 24 44 32 2 13 12 28 162 -47 26 20 42 23 13 18 26 58 45 22 39 47 - 33 0 0 24 32 5 2 13 25 28 161 -47 26 7 44 23 1 18 26 45 34 22 27 55 - 34 0 0 24 20 50 2 13 38 28 160 -48 25 56 2 22 50 26 26 33 40 22 17 12 - 35 0 0 24 10 46 2 13 50 28 160 -48 25 45 34 22 40 44 26 23 2 22 7 36 - 36 0 0 24 1 54 2 14 3 27 159 -48 25 36 21 22 32 9 26 13 40 21 59 8 - 37 0 0 23 54 12 2 14 15 27 158 -48 25 28 22 22 24 43 26 5 33 21 51 47 - 38 0 0 23 47 41 2 14 27 27 157 -48 25 21 36 22 18 24 25 58 41 21 45 32 - 39 0 0 23 42 20 2 14 39 27 156 -48 25 16 4 22 13 13 25 53 4 21 40 25 - 40 0 0 23 38 10 2 14 51 26 156 -48 25 11 45 22 9 9 25 48 41 21 36 23 - 41 0 0 23 35 9 2 15 3 26 155 -48 25 8 39 22 6 13 25 45 33 21 33 29 - 42 0 0 23 33 18 2 15 15 26 154 -48 25 6 46 22 4 24 25 43 39 21 31 41 - 43 0 0 23 32 38 2 15 27 25 153 -48 25 6 6 22 3 43 25 43 0 21 31 0 - 44 0 0 23 33 7 2 15 38 25 152 -47 25 6 40 22 4 10 25 43 35 21 31 25 - 45 0 0 23 34 47 2 15 49 25 152 -47 25 8 26 22 5 44 25 45 24 21 32 57 - 46 0 0 23 37 38 2 16 0 24 151 -47 25 11 27 22 8 26 25 48 29 21 35 36 - 47 0 0 23 41 39 2 16 11 24 150 -47 25 15 41 22 12 16 25 52 49 21 39 23 - 48 0 0 23 46 52 2 16 22 23 150 -46 25 21 10 22 17 15 25 58 24 21 44 17 - 49 0 0 23 53 17 2 16 32 23 149 -46 25 27 54 22 23 23 26 5 17 21 50 19 - 50 0 0 24 0 53 2 16 43 22 148 -45 25 35 53 22 30 41 26 13 26 21 57 30 - 51 0 0 24 9 43 2 16 53 21 148 -45 25 45 9 22 39 8 26 22 52 22 5 49 - 52 0 0 24 19 46 2 17 2 21 147 -45 25 55 41 22 48 45 26 33 38 22 15 18 - 53 0 0 24 31 3 2 17 12 20 146 -44 26 7 32 22 59 34 26 45 42 22 25 57 - 54 0 0 24 43 35 2 17 21 19 146 -43 26 20 41 23 11 35 26 59 7 22 37 47 - 55 0 0 24 57 23 2 17 30 19 145 -43 26 35 10 23 24 48 27 13 54 22 50 48 - 56 0 0 25 12 28 2 17 39 18 145 -42 26 51 0 23 39 15 27 30 4 23 5 2 - 57 0 0 25 28 51 2 17 48 17 144 -42 27 8 13 23 54 56 27 47 38 23 20 28 - 58 0 0 25 46 33 2 17 56 17 143 -41 27 26 50 24 11 52 28 6 38 23 37 9 - 59 0 0 26 5 36 2 18 4 16 143 -40 27 46 51 24 30 5 28 27 5 23 55 5 - 60 0 0 26 26 1 2 18 11 15 142 -40 28 8 21 24 49 35 28 49 3 24 14 17 - 61 0 0 26 47 49 2 18 19 14 142 -39 28 31 19 25 10 25 29 12 32 24 34 47 - 62 0 0 27 11 2 2 18 26 13 141 -38 28 55 48 25 32 35 29 37 34 24 56 35 - 63 0 0 27 35 42 2 18 32 13 141 -37 29 21 51 25 56 7 30 4 14 25 19 44 - 64 0 0 28 1 52 2 18 38 12 140 -36 29 49 31 26 21 2 30 32 33 25 44 14 - 65 0 0 28 29 32 2 18 44 11 140 -35 30 18 49 26 47 22 31 2 34 26 10 8 - 66 0 0 28 58 46 2 18 49 10 139 -35 30 49 49 27 15 10 31 34 21 26 37 27 - 67 0 0 29 29 37 2 18 54 9 138 -34 31 22 35 27 44 27 32 7 59 27 6 13 - 68 0 0 30 2 6 2 18 59 8 138 -33 31 57 10 28 15 16 32 43 30 27 36 28 - 69 0 0 30 36 18 2 19 3 7 137 -32 32 33 39 28 47 38 33 21 1 28 8 14 - 70 0 0 31 12 16 2 19 6 6 137 -31 33 12 6 29 21 38 34 0 37 28 41 35 - 71 0 0 31 50 4 2 19 9 5 136 -30 33 52 38 29 57 17 34 42 24 29 16 31 - 72 0 0 32 29 45 2 19 12 4 136 -29 34 35 19 30 34 39 35 26 30 29 53 8 - 73 0 0 33 11 26 2 19 14 3 135 -28 35 20 19 31 13 47 36 13 2 30 31 27 - 74 0 0 33 55 11 2 19 15 2 135 -26 36 7 44 31 54 45 .. .. .. 31 11 32 - 75 0 0 34 41 6 2 19 15 0 134 -25 .. .. .. 32 37 38 .. .. .. .. .. .. Uncertainty in time = +/- 5 secs [Prediction of 2008 May 8.0] Data for the target star ------------------------ * name: TYC 7354-00933-1 * constellation : Scorpius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 16 42 25.1205 DE: -34 43 37.495 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .022, .022 ) * V mag [mag]: 10.9 * B mag [mag]: 11.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (93) Minerva approx. diameter [km]: 157 approx. diameter ["]: .148 distance from Earth [AU]: 1.46600 * orbital information: orbit source: Preston date of fit: 2008 May 07 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 876 number of rejected observations: 119 time covered by the observations: 1913 Sep 28 - 2008 Apr 17 1 sigma uncertainty ellipse (major, minor, PA): 0.026, 0.015, 100° remarks: * orbital elements for (93) Minerva : Mean anomaly = 333.57708940 deg Arg. of pericenter = 275.75150734 deg Long. of node = 4.13919572 deg Inclination = 8.55697010 deg Eccentricity = 0.14193520 Semimajor axis = 2.75456297 AU Perihelion dist = 2.36359351 AU Mag: H = 7.81, G = 0.15 Epoch of elements : MJD 54598.09300000 TDT (2008 May 12.093) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 12 93 Minerva 2h 12.8m UT 10.9 16 42 25.121-34 43 37.50TYC 7354-00933-1 11.2 11.1 157 20.3 1.466 -2.024 -8.11 -12.8304 -34.723 145.89 18.20 2.2138 -0.27283 0.83942 -4.15507 -1.35281 -0.00187 0.00135 2000 331.8323342008 5 4.00000275.751507 4.139196 8.5569700.14193520 2.7545630 2.3635935 7.7 5.00.15 RATE 2.1558820 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.034 0.027 96 1.19 0.028 0 54594.5020080512_0933-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 May 08, 03:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org