IOTA/IOTA-ES occultation update for (1004) Belopolskya / TYC 6200-00649-1 event on 2009 May 11, 10:15 UT Visible from Summary ------- On 2009 May 11 UT, the 72 km diameter asteroid (1004) Belopolskya will occult a 10.8 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.4 mag to 15.2 mag (the magnitude of the asteroid) for at most 5.3 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: 75 * date and approx. time of event: 2009 May 11, 10:09 - 2009 May 11, 10:19 UT * magnitude of target star: 10.8 * magnitude drop [mag]: 4.4 * estimated maximum duration [s]: 5.3 * Moon: 95 % sunlit, 17° distance * Sun: 168° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 110 * 1 sigma uncertainty interval [path widths]: +/- 0.76 * 1 sigma uncertainty interval [seconds]: +/- 5.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .039 +/- .029) * 1 sigma uncertainty ellipse (major, minor, PA): ( .039", .029", 97° ) * approx speed of asteroid's shadow [km/s]: 13.5271 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6200-00649-1 by 1004 Belopolskya on 2009 May 11 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 156 0 0 58 14 45 10 19 32 0 123 -4 .. .. .. 57 39 9 .. .. .. .. .. .. 157 0 0 57 54 4 10 19 32 1 124 -5 58 30 13 57 18 26 .. .. .. .. .. .. 158 0 0 57 33 7 10 19 32 1 125 -5 58 9 19 56 57 27 59 5 23 .. .. .. 159 0 0 57 11 54 10 19 32 2 126 -6 57 48 8 56 36 11 58 44 15 .. .. .. 160 0 0 56 50 24 10 19 32 3 126 -7 57 26 40 56 14 40 58 22 51 .. .. .. 161 0 0 56 28 40 10 19 31 3 127 -7 57 4 57 55 52 54 58 1 11 54 59 29 162 0 0 56 6 40 10 19 31 4 128 -8 56 42 59 55 30 53 57 39 15 54 37 26 163 0 0 55 44 26 10 19 30 5 129 -9 56 20 45 55 8 37 57 17 3 54 15 9 164 0 0 55 21 57 10 19 29 5 130 -9 55 58 18 54 46 8 56 54 36 53 52 39 165 0 0 54 59 15 10 19 29 6 131 -10 55 35 36 54 23 26 56 31 55 53 29 56 166 0 0 54 36 20 10 19 28 7 131 -11 55 12 41 54 0 30 56 9 0 53 7 0 167 0 0 54 13 12 10 19 26 7 132 -11 54 49 33 53 37 23 55 45 52 52 43 53 168 0 0 53 49 52 10 19 25 8 133 -12 54 26 13 53 14 4 55 22 31 52 20 35 169 0 0 53 26 21 10 19 24 9 134 -13 54 2 41 52 50 33 54 58 58 51 57 6 170 0 0 53 2 40 10 19 23 10 135 -13 53 38 58 52 26 53 54 35 13 51 33 27 171 0 0 52 38 48 10 19 21 10 135 -14 53 15 5 52 3 2 54 11 18 51 9 38 172 0 0 52 14 47 10 19 19 11 136 -15 52 51 2 51 39 3 53 47 12 50 45 41 173 0 0 51 50 37 10 19 17 12 137 -15 52 26 50 51 14 55 53 22 57 50 21 36 174 0 0 51 26 19 10 19 16 12 138 -16 52 2 30 50 50 39 52 58 33 49 57 24 175 0 0 51 1 54 10 19 13 13 139 -17 51 38 2 50 26 17 52 34 1 49 33 5 176 0 0 50 37 22 10 19 11 14 140 -17 51 13 27 50 1 48 52 9 22 49 8 40 177 0 0 50 12 44 10 19 9 15 140 -18 50 48 46 49 37 13 51 44 36 48 44 10 178 0 0 49 48 1 10 19 7 15 141 -18 50 24 0 49 12 34 51 19 44 48 19 35 179 0 0 49 23 14 10 19 4 16 142 -19 49 59 9 48 47 50 50 54 47 47 54 56 180 0 0 48 58 24 10 19 1 17 143 -20 49 34 15 48 23 3 50 29 47 47 30 15 -179 0 0 48 33 30 10 18 58 17 144 -20 49 9 17 47 58 14 50 4 42 47 5 31 -178 0 0 48 8 35 10 18 55 18 144 -21 48 44 18 47 33 23 49 39 36 46 40 46 -177 0 0 47 43 38 10 18 52 19 145 -22 48 19 16 47 8 30 49 14 27 46 16 0 -176 0 0 47 18 41 10 18 49 20 146 -22 47 54 15 46 43 38 48 49 18 45 51 15 -175 0 0 46 53 45 10 18 46 20 147 -23 47 29 13 46 18 46 48 24 8 45 26 30 -174 0 0 46 28 49 10 18 42 21 148 -24 47 4 13 45 53 56 47 58 59 45 1 47 -173 0 0 46 3 56 10 18 38 22 149 -24 46 39 14 45 29 7 47 33 52 44 37 6 -172 0 0 45 39 5 10 18 35 22 150 -25 46 14 18 45 4 22 47 8 47 44 12 28 -171 0 0 45 14 18 10 18 31 23 150 -25 45 49 25 44 39 40 46 43 45 43 47 54 -170 0 0 44 49 35 10 18 27 24 151 -26 45 24 36 44 15 3 46 18 47 43 23 25 -169 0 0 44 24 58 10 18 22 25 152 -27 44 59 53 43 50 31 45 53 54 42 59 1 -168 0 0 44 0 26 10 18 18 25 153 -27 44 35 15 43 26 5 45 29 7 42 34 44 -167 0 0 43 36 1 10 18 14 26 154 -28 44 10 44 43 1 46 45 4 26 42 10 33 -166 0 0 43 11 43 10 18 9 27 155 -28 43 46 20 42 37 34 44 39 52 41 46 30 -165 0 0 42 47 34 10 18 4 27 156 -29 43 22 4 42 13 31 44 15 26 41 22 35 -164 0 0 42 23 33 10 18 0 28 157 -29 42 57 57 41 49 36 43 51 9 40 58 50 -163 0 0 41 59 42 10 17 55 29 158 -30 42 33 59 41 25 52 43 27 1 40 35 14 -162 0 0 41 36 1 10 17 50 29 159 -30 42 10 12 41 2 17 43 3 3 40 11 48 -161 0 0 41 12 32 10 17 44 30 160 -31 41 46 36 40 38 54 42 39 17 39 48 34 -160 0 0 40 49 14 10 17 39 30 161 -31 41 23 12 40 15 42 42 15 42 39 25 32 -159 0 0 40 26 8 10 17 34 31 161 -32 40 59 59 39 52 43 41 52 19 39 2 42 -158 0 0 40 3 16 10 17 28 32 162 -32 40 37 0 39 29 57 41 29 9 38 40 5 -157 0 0 39 40 37 10 17 23 32 163 -32 40 14 15 39 7 24 41 6 13 38 17 41 -156 0 0 39 18 12 10 17 17 33 165 -33 39 51 44 38 45 6 40 43 32 37 55 32 -155 0 0 38 56 3 10 17 11 33 166 -33 39 29 27 38 23 3 40 21 5 37 33 38 -154 0 0 38 34 8 10 17 5 34 167 -34 39 7 27 38 1 15 39 58 54 37 12 0 -153 0 0 38 12 30 10 16 59 34 168 -34 38 45 42 37 39 43 39 36 59 36 50 37 -152 0 0 37 51 9 10 16 53 35 169 -34 38 24 14 37 18 28 39 15 20 36 29 31 -151 0 0 37 30 5 10 16 47 35 170 -35 38 3 4 36 57 30 38 54 0 36 8 42 -150 0 0 37 9 19 10 16 41 36 171 -35 37 42 11 36 36 50 38 32 57 35 48 11 -149 0 0 36 48 51 10 16 34 36 172 -35 37 21 37 36 16 28 38 12 12 35 27 58 -148 0 0 36 28 41 10 16 28 37 173 -35 37 1 21 35 56 25 37 51 47 35 8 4 -147 0 0 36 8 51 10 16 22 37 174 -35 36 41 25 35 36 41 37 31 40 34 48 28 -146 0 0 35 49 21 10 16 15 38 175 -36 36 21 48 35 17 17 37 11 54 34 29 13 -145 0 0 35 30 11 10 16 9 38 177 -36 36 2 32 34 58 12 36 52 28 34 10 17 -144 0 0 35 11 22 10 16 2 38 178 -36 35 43 37 34 39 29 36 33 24 33 51 42 -143 0 0 34 52 53 10 15 55 39 179 -36 35 25 3 34 21 6 36 14 40 33 33 27 -142 0 0 34 34 46 10 15 48 39 180 -36 35 6 50 34 3 5 35 56 18 33 15 34 -141 0 0 34 17 1 10 15 42 39 181 -36 34 48 59 33 45 25 35 38 18 32 58 3 -140 0 0 33 59 39 10 15 35 39 183 -36 34 31 31 33 28 8 35 20 41 32 40 53 -139 0 0 33 42 39 10 15 28 40 184 -36 34 14 26 33 11 13 35 3 27 32 24 6 -138 0 0 33 26 1 10 15 21 40 185 -36 33 57 43 32 54 41 34 46 36 32 7 42 -137 0 0 33 9 48 10 15 14 40 186 -36 33 41 24 32 38 32 34 30 9 31 51 40 -136 0 0 32 53 58 10 15 7 40 187 -36 33 25 29 32 22 47 34 14 6 31 36 2 -135 0 0 32 38 32 10 15 0 40 189 -36 33 9 58 32 7 26 33 58 27 31 20 48 -134 0 0 32 23 30 10 14 53 41 190 -36 32 54 51 31 52 29 33 43 12 31 5 58 -133 0 0 32 8 53 10 14 46 41 191 -36 32 40 9 31 37 56 33 28 23 30 51 32 -132 0 0 31 54 40 10 14 39 41 192 -36 32 25 52 31 23 48 33 13 59 30 37 30 -131 0 0 31 40 53 10 14 32 41 194 -36 32 12 1 31 10 5 33 0 0 30 23 54 -130 0 0 31 27 31 10 14 25 41 195 -35 31 58 35 30 56 48 32 46 27 30 10 42 -129 0 0 31 14 35 10 14 18 41 196 -35 31 45 34 30 43 56 32 33 20 29 57 56 -128 0 0 31 2 5 10 14 11 41 197 -35 31 33 0 30 31 29 32 20 39 29 45 35 -127 0 0 30 50 1 10 14 4 41 199 -35 31 20 52 30 19 29 32 8 25 29 33 40 -126 0 0 30 38 23 10 13 57 41 200 -34 31 9 10 30 7 55 31 56 38 29 22 11 -125 0 0 30 27 11 10 13 50 40 201 -34 30 57 55 29 56 47 31 45 17 29 11 9 -124 0 0 30 16 27 10 13 43 40 202 -34 30 47 7 29 46 5 31 34 23 29 0 32 -123 0 0 30 6 9 10 13 36 40 204 -33 30 36 46 29 35 51 31 23 57 28 50 22 -122 0 0 29 56 19 10 13 29 40 205 -33 30 26 53 29 26 3 31 13 59 28 40 39 -121 0 0 29 46 55 10 13 22 40 206 -33 30 17 26 29 16 43 31 4 28 28 31 23 -120 0 0 29 37 59 10 13 15 39 207 -32 30 8 28 29 7 50 30 55 24 28 22 34 -119 0 0 29 29 31 10 13 8 39 208 -32 29 59 57 28 59 24 30 46 49 28 14 12 -118 0 0 29 21 31 10 13 1 39 209 -31 29 51 54 28 51 26 30 38 42 28 6 18 -117 0 0 29 13 58 10 12 55 39 210 -31 29 44 19 28 43 56 30 31 4 27 58 51 -116 0 0 29 6 54 10 12 48 38 212 -30 29 37 12 28 36 54 30 23 53 27 51 51 -115 0 0 29 0 17 10 12 41 38 213 -30 29 30 34 28 30 19 30 17 12 27 45 20 -114 0 0 28 54 9 10 12 35 37 214 -29 29 24 24 28 24 13 30 10 59 27 39 16 -113 0 0 28 48 29 10 12 28 37 215 -29 29 18 42 28 18 35 30 5 15 27 33 40 -112 0 0 28 43 18 10 12 22 37 216 -28 29 13 29 28 13 25 29 59 59 27 28 33 -111 0 0 28 38 35 10 12 15 36 217 -28 29 8 45 28 8 44 29 55 13 27 23 54 -110 0 0 28 34 21 10 12 9 36 218 -27 29 4 30 28 4 31 29 50 56 27 19 42 -109 0 0 28 30 36 10 12 3 35 219 -26 29 0 44 28 0 47 29 47 8 27 16 0 -108 0 0 28 27 20 10 11 56 35 220 -26 28 57 27 27 57 31 29 43 49 27 12 46 -107 0 0 28 24 32 10 11 50 34 221 -25 28 54 38 27 54 44 29 41 0 27 10 0 -106 0 0 28 22 14 10 11 44 34 222 -25 28 52 19 27 52 26 29 38 40 27 7 43 -105 0 0 28 20 25 10 11 38 33 222 -24 28 50 30 27 50 38 29 36 50 27 5 54 -104 0 0 28 19 4 10 11 32 33 223 -23 28 49 9 27 49 18 29 35 29 27 4 35 -103 0 0 28 18 13 10 11 26 32 224 -23 28 48 18 27 48 27 29 34 38 27 3 44 -102 0 0 28 17 51 10 11 21 31 225 -22 28 47 56 27 48 5 29 34 16 27 3 22 -101 0 0 28 17 59 10 11 15 31 226 -21 28 48 4 27 48 12 29 34 24 27 3 29 -100 0 0 28 18 36 10 11 10 30 227 -21 28 48 41 27 48 48 29 35 2 27 4 4 - 99 0 0 28 19 42 10 11 4 30 227 -20 28 49 48 27 49 54 29 36 10 27 5 9 - 98 0 0 28 21 17 10 10 59 29 228 -19 28 51 24 27 51 28 29 37 47 27 6 42 - 97 0 0 28 23 22 10 10 54 28 229 -18 28 53 30 27 53 32 29 39 55 27 8 45 - 96 0 0 28 25 56 10 10 49 28 230 -18 28 56 5 27 56 5 29 42 32 27 11 16 - 95 0 0 28 29 0 10 10 44 27 230 -17 28 59 10 27 59 8 29 45 39 27 14 17 - 94 0 0 28 32 33 10 10 39 26 231 -16 29 2 45 28 2 39 29 49 15 27 17 46 - 93 0 0 28 36 35 10 10 34 25 232 -15 29 6 49 28 6 40 29 53 22 27 21 45 - 92 0 0 28 41 7 10 10 29 25 233 -15 29 11 22 28 11 10 29 57 58 27 26 12 - 91 0 0 28 46 8 10 10 25 24 233 -14 29 16 25 28 16 9 30 3 4 27 31 9 - 90 0 0 28 51 38 10 10 21 23 234 -13 29 21 57 28 21 37 30 8 40 27 36 34 - 89 0 0 28 57 38 10 10 16 22 235 -12 29 27 59 28 27 34 30 14 45 27 42 28 - 88 0 0 29 4 6 10 10 12 22 235 -11 29 34 30 28 34 1 30 21 21 27 48 51 - 87 0 0 29 11 4 10 10 8 21 236 -11 29 41 31 28 40 56 30 28 25 27 55 43 - 86 0 0 29 18 31 10 10 4 20 236 -10 29 49 1 28 48 21 30 36 0 28 3 3 - 85 0 0 29 26 27 10 10 1 19 237 -9 29 57 0 28 56 14 30 44 3 28 10 52 - 84 0 0 29 34 53 10 9 57 19 238 -8 30 5 28 29 4 36 30 52 36 28 19 10 - 83 0 0 29 43 46 10 9 54 18 238 -7 30 14 25 29 13 27 31 1 39 28 27 56 - 82 0 0 29 53 9 10 9 51 17 239 -6 30 23 51 29 22 46 31 11 10 28 37 10 - 81 0 0 30 3 0 10 9 47 16 239 -6 30 33 46 29 32 34 31 21 11 28 46 53 - 80 0 0 30 13 20 10 9 44 15 240 -5 30 44 10 29 42 50 31 31 40 28 57 4 - 79 0 0 30 24 9 10 9 42 14 241 -4 30 55 2 29 53 35 31 42 39 29 7 43 - 78 0 0 30 35 25 10 9 39 14 241 -3 31 6 23 30 4 47 31 54 6 29 18 50 - 77 0 0 30 47 10 10 9 36 13 242 -2 31 18 12 30 16 28 32 6 1 29 30 24 - 76 0 0 30 59 22 10 9 34 12 242 -1 31 30 29 30 28 36 32 18 25 29 42 26 - 75 0 0 31 12 3 10 9 32 11 243 0 31 43 13 30 41 12 32 31 17 29 54 56 Uncertainty in time = +/- 5 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 6200-00649-1 * constellation : Scorpius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 16 04 10.4738 DE: -16 35 28.851 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .022 ) * V mag [mag]: 10.8 * B mag [mag]: 11.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1004) Belopolskya approx. diameter [km]: 72 approx. diameter ["]: .038 distance from Earth [AU]: 2.59700 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1054 number of rejected observations: 82 time covered by the observations: 1923 Sep 13 - 2008 Feb 13 1 sigma uncertainty ellipse (major, minor, PA): 0.032, 0.018, 101° remarks: * orbital elements for (1004) Belopolskya : Mean anomaly = 232.06500799 deg Arg. of pericenter = 220.23410818 deg Long. of node = 153.83291234 deg Inclination = 2.97880962 deg Eccentricity = 0.08357411 Semimajor axis = 3.40156929 AU Perihelion dist = 3.11728615 AU Mag: H = 9.77, G = 0.15 Epoch of elements : MJD 54962.42700000 TDT (2009 May 11.427) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 May 11 1004 Belopolskya 10h 14.4m UT 10.8 16 4 10.474-16 35 28.85TYC 6200-00649-1 11.4 15.2 72 5.3 2.597 -1.752 5.88 -141.8988 -16.592 25.49 17.97 10.2405 0.17218 0.73667 -7.43517 1.73577 -0.00122 -0.00017 2000 231.6837182009 5 9.00000220.234108153.832912 2.9788100.08357411 3.4015693 3.117286210.0 5.00.15 RATE 1.5710330 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.039 0.029 97 1.76 0.029 0 54545.5020090511_0649-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 08:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org