IOTA/IOTA-ES occultation update for (46) Hestia / TYC 6184-00208-1 event on 2009 Jun 06, 07:50 UT Visible from S USA, N Mexico Summary ------- On 2009 Jun 06 UT, the 124 km diameter asteroid (46) Hestia will occult a 9.8 mag star in the constellation Libra for observers along a path across S USA, N Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.5 mag to 12.2 mag (the magnitude of the asteroid) for at most 11.9 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: 99 * date and approx. time of event: 2009 Jun 06, 07:43 - 2009 Jun 06, 07:56 UT * midpoint of event [JD]: 2454988.826625 * magnitude of target star: 9.8 * magnitude drop [mag]: 2.5 * estimated maximum duration [s]: 11.9 * Moon: 98 % sunlit, 9° distance * Sun: 159° distance * rough path description: S USA, N Mexico The occultation path -------------------- * approximate projected width [km]: 189 * 1 sigma uncertainty interval [path widths]: +/- 0.23 * 1 sigma uncertainty interval [seconds]: +/- 2.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .026 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .026", .024", 93° ) * approx speed of asteroid's shadow [km/s]: 10.4705 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6184-00208-1 by 46 Hestia on 2009 Jun 6 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 -179 0 0 50 2 36 7 56 22 16 141 0 51 4 12 49 2 28 51 33 4 48 35 16 -178 0 0 49 38 32 7 56 19 17 142 -1 50 40 3 48 38 29 51 8 52 48 11 20 -177 0 0 49 14 25 7 56 15 17 143 -2 50 15 49 48 14 27 50 44 36 47 47 20 -176 0 0 48 50 13 7 56 12 18 144 -3 49 51 32 47 50 22 50 20 15 47 23 17 -175 0 0 48 25 59 7 56 8 19 145 -3 49 27 11 47 26 14 49 55 51 46 59 12 -174 0 0 48 1 43 7 56 4 19 145 -4 49 2 48 47 2 4 49 31 25 46 35 5 -173 0 0 47 37 26 7 55 59 20 146 -5 48 38 23 46 37 54 49 6 57 46 10 58 -172 0 0 47 13 8 7 55 55 21 147 -6 48 13 58 46 13 44 48 42 27 45 46 51 -171 0 0 46 48 51 7 55 50 22 148 -6 47 49 32 45 49 34 48 17 58 45 22 44 -170 0 0 46 24 34 7 55 46 22 149 -7 47 25 8 45 25 25 47 53 29 44 58 39 -169 0 0 46 0 20 7 55 41 23 150 -8 47 0 44 45 1 19 47 29 2 44 34 36 -168 0 0 45 36 8 7 55 36 24 151 -9 46 36 23 44 37 15 47 4 36 44 10 36 -167 0 0 45 11 59 7 55 30 24 151 -10 46 12 5 44 13 15 46 40 14 43 46 40 -166 0 0 44 47 54 7 55 25 25 152 -10 45 47 51 43 49 19 46 15 55 43 22 47 -165 0 0 44 23 54 7 55 19 26 153 -11 45 23 41 43 25 28 45 51 40 42 59 0 -164 0 0 43 59 59 7 55 14 26 154 -12 44 59 37 43 1 42 45 27 31 42 35 19 -163 0 0 43 36 11 7 55 8 27 155 -13 44 35 38 42 38 3 45 3 28 42 11 44 -162 0 0 43 12 29 7 55 2 28 156 -13 44 11 46 42 14 31 44 39 31 41 48 16 -161 0 0 42 48 55 7 54 56 28 157 -14 43 48 2 41 51 7 44 15 42 41 24 56 -160 0 0 42 25 29 7 54 49 29 158 -15 43 24 26 41 27 51 43 52 0 41 1 44 -159 0 0 42 2 12 7 54 43 30 159 -16 43 0 58 41 4 44 43 28 28 40 38 42 -158 0 0 41 39 5 7 54 36 30 160 -16 42 37 40 40 41 47 43 5 5 40 15 49 -157 0 0 41 16 8 7 54 29 31 161 -17 42 14 33 40 19 0 42 41 52 39 53 6 -156 0 0 40 53 23 7 54 22 31 162 -18 41 51 36 39 56 24 42 18 50 39 30 35 -155 0 0 40 30 48 7 54 15 32 163 -19 41 28 51 39 34 0 41 56 0 39 8 15 -154 0 0 40 8 26 7 54 8 33 164 -19 41 6 18 39 11 48 41 33 21 38 46 8 -153 0 0 39 46 17 7 54 1 33 165 -20 40 43 58 38 49 49 41 10 56 38 24 13 -152 0 0 39 24 21 7 53 53 34 166 -21 40 21 51 38 28 3 40 48 44 38 2 32 -151 0 0 39 2 39 7 53 46 34 167 -21 39 59 58 38 6 31 40 26 46 37 41 5 -150 0 0 38 41 11 7 53 38 35 168 -22 39 38 20 37 45 14 40 5 2 37 19 52 -149 0 0 38 19 59 7 53 31 35 169 -23 39 16 57 37 24 12 39 43 34 36 58 54 -148 0 0 37 59 3 7 53 23 36 170 -24 38 55 49 37 3 25 39 22 21 36 38 12 -147 0 0 37 38 22 7 53 15 36 171 -24 38 34 58 36 42 55 39 1 25 36 17 46 -146 0 0 37 17 58 7 53 7 37 172 -25 38 14 24 36 22 41 38 40 45 35 57 37 -145 0 0 36 57 52 7 52 58 37 173 -25 37 54 7 36 2 45 38 20 23 35 37 45 -144 0 0 36 38 3 7 52 50 37 175 -26 37 34 7 35 43 5 38 0 19 35 18 10 -143 0 0 36 18 32 7 52 42 38 176 -27 37 14 26 35 23 44 37 40 33 34 58 53 -142 0 0 35 59 20 7 52 34 38 177 -27 36 55 4 35 4 42 37 21 6 34 39 55 -141 0 0 35 40 27 7 52 25 39 178 -28 36 36 1 34 45 58 37 1 57 34 21 15 -140 0 0 35 21 53 7 52 16 39 179 -29 36 17 17 34 27 34 36 43 9 34 2 55 -139 0 0 35 3 39 7 52 8 39 180 -29 35 58 53 34 9 29 36 24 41 33 44 54 -138 0 0 34 45 46 7 51 59 39 182 -30 35 40 50 33 51 45 36 6 33 33 27 14 -137 0 0 34 28 13 7 51 50 40 183 -30 35 23 8 33 34 21 35 48 46 33 9 54 -136 0 0 34 11 1 7 51 42 40 184 -31 35 5 47 33 17 18 35 31 20 32 52 55 -135 0 0 33 54 10 7 51 33 40 185 -31 34 48 47 33 0 36 35 14 16 32 36 17 -134 0 0 33 37 42 7 51 24 40 186 -32 34 32 9 32 44 15 34 57 34 32 20 0 -133 0 0 33 21 35 7 51 15 41 188 -32 34 15 54 32 28 17 34 41 15 32 4 5 -132 0 0 33 5 51 7 51 6 41 189 -33 34 0 1 32 12 41 34 25 18 31 48 33 -131 0 0 32 50 29 7 50 57 41 190 -33 33 44 31 31 57 27 34 9 44 31 33 22 -130 0 0 32 35 30 7 50 48 41 191 -34 33 29 24 31 42 36 33 54 33 31 18 35 -129 0 0 32 20 55 7 50 39 41 193 -34 33 14 41 31 28 8 33 39 46 31 4 10 -128 0 0 32 6 43 7 50 30 41 194 -35 33 0 22 31 14 4 33 25 23 30 50 9 -127 0 0 31 52 56 7 50 21 41 195 -35 32 46 26 31 0 23 33 11 24 30 36 32 -126 0 0 31 39 32 7 50 12 41 196 -35 32 32 55 30 47 6 32 57 49 30 23 18 -125 0 0 31 26 32 7 50 3 41 198 -36 32 19 49 30 34 14 32 44 39 30 10 28 -124 0 0 31 13 58 7 49 54 41 199 -36 32 7 7 30 21 45 32 31 54 29 58 3 -123 0 0 31 1 48 7 49 45 41 200 -36 31 54 50 30 9 42 32 19 35 29 46 2 -122 0 0 30 50 3 7 49 36 41 201 -36 31 42 59 29 58 3 32 7 40 29 34 25 -121 0 0 30 38 43 7 49 27 41 203 -37 31 31 33 29 46 49 31 56 12 29 23 14 -120 0 0 30 27 49 7 49 18 40 204 -37 31 20 33 29 36 0 31 45 9 29 12 28 -119 0 0 30 17 20 7 49 9 40 205 -37 31 9 59 29 25 37 31 34 32 29 2 7 -118 0 0 30 7 17 7 49 0 40 206 -37 30 59 51 29 15 39 31 24 21 28 52 12 -117 0 0 29 57 41 7 48 52 40 207 -37 30 50 9 29 6 7 31 14 37 28 42 42 -116 0 0 29 48 30 7 48 43 40 208 -38 30 40 54 28 57 1 31 5 19 28 33 38 -115 0 0 29 39 46 7 48 34 39 210 -38 30 32 5 28 48 22 30 56 28 28 25 0 -114 0 0 29 31 28 7 48 25 39 211 -38 30 23 43 28 40 8 30 48 4 28 16 48 -113 0 0 29 23 37 7 48 17 39 212 -38 30 15 48 28 32 21 30 40 7 28 9 3 -112 0 0 29 16 13 7 48 8 38 213 -38 30 8 20 28 25 0 30 32 37 28 1 44 -111 0 0 29 9 16 7 48 0 38 214 -38 30 1 19 28 18 6 30 25 35 27 54 52 -110 0 0 29 2 46 7 47 51 38 215 -38 29 54 45 28 11 39 30 18 59 27 48 26 -109 0 0 28 56 43 7 47 43 37 216 -38 29 48 39 28 5 39 30 12 52 27 42 27 -108 0 0 28 51 7 7 47 35 37 217 -38 29 43 1 28 0 6 30 7 12 27 36 55 -107 0 0 28 45 59 7 47 26 36 218 -38 29 37 50 27 55 0 30 2 0 27 31 50 -106 0 0 28 41 18 7 47 18 36 219 -38 29 33 7 27 50 22 29 57 16 27 27 13 -105 0 0 28 37 5 7 47 10 35 220 -38 29 28 52 27 46 11 29 53 0 27 23 2 -104 0 0 28 33 20 7 47 2 35 221 -37 29 25 5 27 42 27 29 49 12 27 19 19 -103 0 0 28 30 2 7 46 55 34 222 -37 29 21 46 27 39 11 29 45 53 27 16 4 -102 0 0 28 27 12 7 46 47 34 223 -37 29 18 55 27 36 22 29 43 1 27 13 16 -101 0 0 28 24 51 7 46 39 33 224 -37 29 16 33 27 34 1 29 40 39 27 10 55 -100 0 0 28 22 57 7 46 32 33 225 -37 29 14 39 27 32 8 29 38 44 27 9 2 - 99 0 0 28 21 32 7 46 24 32 225 -36 29 13 13 27 30 43 29 37 18 27 7 37 - 98 0 0 28 20 35 7 46 17 31 226 -36 29 12 16 27 29 46 29 36 21 27 6 40 - 97 0 0 28 20 6 7 46 10 31 227 -36 29 11 47 27 29 17 29 35 52 27 6 11 - 96 0 0 28 20 5 7 46 3 30 228 -35 29 11 47 27 29 15 29 35 52 27 6 9 - 95 0 0 28 20 32 7 45 56 30 229 -35 29 12 15 27 29 42 29 36 21 27 6 36 - 94 0 0 28 21 28 7 45 49 29 229 -35 29 13 12 27 30 37 29 37 19 27 7 31 - 93 0 0 28 22 53 7 45 43 28 230 -34 29 14 38 27 32 0 29 38 45 27 8 53 - 92 0 0 28 24 46 7 45 36 28 231 -34 29 16 33 27 33 52 29 40 40 27 10 44 - 91 0 0 28 27 7 7 45 30 27 232 -33 29 18 56 27 36 11 29 43 5 27 13 3 - 90 0 0 28 29 57 7 45 24 26 232 -33 29 21 48 27 38 59 29 45 58 27 15 49 - 89 0 0 28 33 15 7 45 18 25 233 -32 29 25 9 27 42 15 29 49 20 27 19 4 - 88 0 0 28 37 2 7 45 12 25 234 -32 29 28 58 27 45 59 29 53 11 27 22 47 - 87 0 0 28 41 18 7 45 6 24 234 -31 29 33 17 27 50 12 29 57 31 27 26 59 - 86 0 0 28 46 2 7 45 0 23 235 -31 29 38 4 27 54 53 30 2 19 27 31 38 - 85 0 0 28 51 14 7 44 55 22 236 -30 29 43 20 28 0 2 30 7 37 27 36 46 - 84 0 0 28 56 55 7 44 50 22 236 -30 29 49 5 28 5 39 30 13 24 27 42 21 - 83 0 0 29 3 4 7 44 45 21 237 -29 29 55 18 28 11 44 30 19 39 27 48 25 - 82 0 0 29 9 42 7 44 40 20 238 -29 30 2 0 28 18 18 30 26 23 27 54 56 - 81 0 0 29 16 48 7 44 35 19 238 -28 30 9 11 28 25 19 30 33 37 28 1 56 - 80 0 0 29 24 22 7 44 30 19 239 -27 30 16 51 28 32 49 30 41 18 28 9 24 - 79 0 0 29 32 25 7 44 26 18 239 -27 30 24 59 28 40 47 30 49 29 28 17 19 - 78 0 0 29 40 56 7 44 22 17 240 -26 30 33 35 28 49 12 30 58 8 28 25 42 - 77 0 0 29 49 55 7 44 18 16 241 -25 30 42 40 28 58 6 31 7 15 28 34 34 - 76 0 0 29 59 22 7 44 14 15 241 -25 30 52 13 29 7 27 31 16 51 28 43 52 - 75 0 0 30 9 17 7 44 11 14 242 -24 31 2 14 29 17 16 31 26 55 28 53 38 - 74 0 0 30 19 39 7 44 7 14 242 -23 31 12 43 29 27 32 31 37 28 29 3 52 - 73 0 0 30 30 30 7 44 4 13 243 -23 31 23 40 29 38 16 31 48 28 29 14 33 - 72 0 0 30 41 48 7 44 1 12 243 -22 31 35 6 29 49 28 31 59 57 29 25 41 - 71 0 0 30 53 33 7 43 58 11 244 -21 31 46 58 30 1 6 32 11 53 29 37 17 - 70 0 0 31 5 46 7 43 55 10 244 -20 31 59 18 30 13 11 32 24 17 29 49 19 - 69 0 0 31 18 26 7 43 53 9 245 -20 32 12 6 30 25 44 32 37 8 30 1 48 - 68 0 0 31 31 32 7 43 51 9 245 -19 32 25 21 30 38 43 32 50 27 30 14 43 - 67 0 0 31 45 6 7 43 49 8 246 -18 32 39 3 30 52 8 33 4 13 30 28 5 - 66 0 0 31 59 5 7 43 47 7 247 -17 32 53 11 31 6 0 33 18 25 30 41 54 - 65 0 0 32 13 32 7 43 46 6 247 -17 33 7 46 31 20 18 33 33 4 30 56 8 - 64 0 0 32 28 24 7 43 44 5 248 -16 33 22 47 31 35 1 33 48 10 31 10 48 - 63 0 0 32 43 42 7 43 43 4 248 -15 33 38 14 31 50 11 34 3 42 31 25 53 - 62 0 0 32 59 25 7 43 42 3 249 -14 33 54 7 32 5 45 34 19 39 31 41 24 - 61 0 0 33 15 34 7 43 41 2 249 -13 34 10 26 32 21 45 34 36 2 31 57 19 - 60 0 0 33 32 8 7 43 41 2 250 -12 34 27 10 32 38 9 34 52 51 32 13 40 - 59 0 0 33 49 6 7 43 41 1 250 -12 34 44 18 32 54 58 35 10 4 32 30 24 Uncertainty in time = +/- 3 secs [Prediction of 2008 Apr 28.0] Data for the target star ------------------------ * name: TYC 6184-00208-1 * constellation : Libra * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 15 33 46.5490 DE: -15 50 39.845 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .022, .022 ) * V mag [mag]: 9.8 * B mag [mag]: 10.5 * Apparent position with proper motion RA(deg): 233.5856870702 DE(deg): -15.8786403171 * Equation of equinoxes (radians) : 0.000060380230600 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (46) Hestia approx. diameter [km]: 124 approx. diameter ["]: .102 distance from Earth [AU]: 1.67100 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1387 number of rejected observations: 152 time covered by the observations: 1900 Mar 07 - 2008 Feb 13 1 sigma uncertainty ellipse (major, minor, PA): 0.014, 0.008, 102° remarks: * orbital elements for (46) Hestia : Mean anomaly = 263.67051765 deg Arg. of pericenter = 176.84038459 deg Long. of node = 181.15788596 deg Inclination = 2.34327667 deg Eccentricity = 0.17290078 Semimajor axis = 2.52433181 AU Perihelion dist = 2.08787286 AU Mag: H = 8.37, G = 0.06 Epoch of elements : MJD 54988.32600000 TDT (2009 Jun 06.326) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jun 6 46 Hestia 7h 50.3m UT 9.8 15 33 46.549-15 50 39.84TYC 6184-00208-1 10.5 12.2 124 11.9 1.671 -2.095 7.27 -139.0033 -15.845 62.09 22.68 7.8390 0.17597 0.73237 -5.74594 1.38229 0.00182 -0.00074 2000 261.6244462009 529.00000176.840385181.157886 2.3432770.17290078 2.5243318 2.0878729 8.4 5.00.06 RATE 2.4574490 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.026 0.024 93 1.23 0.024 0 54584.5020090606_0208-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 28, 02:03 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org