IOTA/IOTA-ES occultation update for (2649) Oongaq / TYC 5724-02553-1 event on 2009 Jul 01, 15:35 UT Visible from Summary ------- On 2009 Jul 01 UT, the 33 km diameter asteroid (2649) Oongaq will occult a 10.5 mag star in the constellation Aquila for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.4 mag to 15.9 mag (the magnitude of the asteroid) for at most 2.8 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: 29 * date and approx. time of event: 2009 Jul 01, 15:29 - 2009 Jul 01, 15:42 UT * magnitude of target star: 10.5 * magnitude drop [mag]: 5.4 * estimated maximum duration [s]: 2.8 * Moon: 73 % sunlit, 81° distance * Sun: 159° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 43 * 1 sigma uncertainty interval [path widths]: +/- 2.29 * 1 sigma uncertainty interval [seconds]: +/- 7.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .072 +/- .054) * 1 sigma uncertainty ellipse (major, minor, PA): ( .073", .053", 75° ) * approx speed of asteroid's shadow [km/s]: 11.8126 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5724-02553-1 by 2649 Oongaq on 2009 Jul 1 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 66 0 0 49 30 35 15 42 9 4 107 0 49 42 39 49 18 34 50 38 22 .. .. .. 67 0 0 49 21 6 15 42 8 5 108 -1 49 33 10 49 9 4 50 28 56 .. .. .. 68 0 0 49 11 27 15 42 7 5 108 -2 49 23 32 48 59 24 50 19 21 48 4 41 69 0 0 49 1 38 15 42 7 6 109 -2 49 13 44 48 49 35 50 9 35 47 54 49 70 0 0 48 51 40 15 42 6 7 110 -3 49 3 46 48 39 36 49 59 40 47 44 47 71 0 0 48 41 31 15 42 5 7 111 -3 48 53 38 48 29 27 49 49 36 47 34 36 72 0 0 48 31 14 15 42 3 8 111 -4 48 43 21 48 19 9 49 39 21 47 24 15 73 0 0 48 20 47 15 42 2 9 112 -5 48 32 55 48 8 41 49 28 58 47 13 45 74 0 0 48 10 11 15 42 1 9 113 -5 48 22 19 47 58 4 49 18 25 47 3 6 75 0 0 47 59 25 15 41 59 10 114 -6 48 11 34 47 47 19 49 7 43 46 52 17 76 0 0 47 48 31 15 41 58 11 114 -7 48 0 41 47 36 24 48 56 52 46 41 20 77 0 0 47 37 28 15 41 56 12 115 -7 47 49 38 47 25 20 48 45 52 46 30 14 78 0 0 47 26 16 15 41 54 12 116 -8 47 38 27 47 14 8 48 34 43 46 19 0 79 0 0 47 14 56 15 41 53 13 117 -8 47 27 7 47 2 47 48 23 25 46 7 37 80 0 0 47 3 27 15 41 51 14 117 -9 47 15 39 46 51 18 48 11 59 45 56 5 81 0 0 46 51 50 15 41 49 14 118 -9 47 4 2 46 39 40 48 0 25 45 44 26 82 0 0 46 40 5 15 41 46 15 119 -10 46 52 18 46 27 55 47 48 43 45 32 38 83 0 0 46 28 12 15 41 44 16 120 -11 46 40 25 46 16 1 47 36 52 45 20 43 84 0 0 46 16 11 15 41 42 16 121 -11 46 28 25 46 4 0 47 24 54 45 8 40 85 0 0 46 4 3 15 41 39 17 121 -12 46 16 17 45 51 52 47 12 48 44 56 29 86 0 0 45 51 48 15 41 36 18 122 -12 46 4 2 45 39 36 47 0 35 44 44 11 87 0 0 45 39 25 15 41 34 18 123 -13 45 51 39 45 27 12 46 48 14 44 31 47 88 0 0 45 26 55 15 41 31 19 124 -14 45 39 10 45 14 42 46 35 46 44 19 15 89 0 0 45 14 18 15 41 28 20 124 -14 45 26 33 45 2 5 46 23 11 44 6 36 90 0 0 45 1 35 15 41 25 20 125 -15 45 13 50 44 49 22 46 10 30 43 53 51 91 0 0 44 48 45 15 41 22 21 126 -15 45 1 1 44 36 32 45 57 42 43 41 0 92 0 0 44 35 49 15 41 18 22 127 -16 44 48 6 44 23 36 45 44 47 43 28 3 93 0 0 44 22 48 15 41 15 23 128 -16 44 35 4 44 10 33 45 31 47 43 15 0 94 0 0 44 9 40 15 41 11 23 128 -17 44 21 57 43 57 26 45 18 41 43 1 51 95 0 0 43 56 27 15 41 8 24 129 -17 44 8 44 43 44 12 45 5 29 42 48 37 96 0 0 43 43 9 15 41 4 25 130 -18 43 55 26 43 30 54 44 52 11 42 35 18 97 0 0 43 29 45 15 41 0 25 131 -19 43 42 2 43 17 30 44 38 49 42 21 53 98 0 0 43 16 17 15 40 56 26 132 -19 43 28 34 43 4 2 44 25 21 42 8 24 99 0 0 43 2 44 15 40 52 27 132 -20 43 15 2 42 50 29 44 11 49 41 54 51 100 0 0 42 49 7 15 40 48 27 133 -20 43 1 25 42 36 52 43 58 13 41 41 13 101 0 0 42 35 26 15 40 43 28 134 -21 42 47 43 42 23 11 43 44 32 41 27 32 102 0 0 42 21 41 15 40 39 29 135 -21 42 33 59 42 9 26 43 30 47 41 13 47 103 0 0 42 7 52 15 40 34 29 136 -22 42 20 10 41 55 37 43 16 59 40 59 58 104 0 0 41 54 1 15 40 30 30 137 -22 42 6 18 41 41 45 43 3 7 40 46 6 105 0 0 41 40 6 15 40 25 31 138 -23 41 52 23 41 27 51 42 49 12 40 32 12 106 0 0 41 26 8 15 40 20 31 138 -23 41 38 26 41 13 53 42 35 14 40 18 15 107 0 0 41 12 8 15 40 15 32 139 -24 41 24 26 40 59 53 42 21 14 40 4 15 108 0 0 40 58 6 15 40 10 33 140 -24 41 10 23 40 45 51 42 7 11 39 50 13 109 0 0 40 44 2 15 40 5 33 141 -24 40 56 19 40 31 47 41 53 6 39 36 10 110 0 0 40 29 56 15 39 59 34 142 -25 40 42 13 40 17 41 41 38 59 39 22 5 111 0 0 40 15 49 15 39 54 35 143 -25 40 28 6 40 3 34 41 24 51 39 7 59 112 0 0 40 1 41 15 39 48 35 144 -26 40 13 57 39 49 26 41 10 42 38 53 51 113 0 0 39 47 32 15 39 43 36 145 -26 39 59 48 39 35 18 40 56 32 38 39 44 114 0 0 39 33 22 15 39 37 37 146 -27 39 45 39 39 21 8 40 42 21 38 25 35 115 0 0 39 19 13 15 39 31 37 147 -27 39 31 29 39 6 59 40 28 10 38 11 27 116 0 0 39 5 3 15 39 25 38 148 -27 39 17 19 38 52 50 40 13 59 37 57 19 117 0 0 38 50 54 15 39 19 38 149 -28 39 3 10 38 38 41 39 59 48 37 43 11 118 0 0 38 36 46 15 39 13 39 150 -28 38 49 1 38 24 33 39 45 38 37 29 5 119 0 0 38 22 38 15 39 7 40 151 -28 38 34 53 38 10 26 39 31 29 37 14 59 120 0 0 38 8 32 15 39 1 40 152 -29 38 20 46 37 56 20 39 17 21 37 0 55 121 0 0 37 54 27 15 38 54 41 153 -29 38 6 42 37 42 16 39 3 14 36 46 52 122 0 0 37 40 25 15 38 48 41 154 -29 37 52 38 37 28 13 38 49 9 36 32 51 123 0 0 37 26 24 15 38 41 42 155 -30 37 38 37 37 14 13 38 35 6 36 18 53 124 0 0 37 12 26 15 38 34 42 157 -30 37 24 39 37 0 15 38 21 6 36 4 57 125 0 0 36 58 31 15 38 28 43 158 -30 37 10 43 36 46 21 38 7 8 35 51 4 126 0 0 36 44 39 15 38 21 43 159 -30 36 56 51 36 32 29 37 53 13 35 37 14 127 0 0 36 30 50 15 38 14 44 160 -31 36 43 1 36 18 40 37 39 22 35 23 28 128 0 0 36 17 5 15 38 7 44 161 -31 36 29 16 36 4 56 37 25 34 35 9 46 129 0 0 36 3 23 15 38 0 45 163 -31 36 15 34 35 51 15 37 11 50 34 56 7 130 0 0 35 49 46 15 37 53 45 164 -31 36 1 57 35 37 38 36 58 10 34 42 33 131 0 0 35 36 14 15 37 46 46 165 -31 35 48 24 35 24 7 36 44 35 34 29 3 132 0 0 35 22 46 15 37 38 46 166 -31 35 34 55 35 10 39 36 31 4 34 15 38 133 0 0 35 9 24 15 37 31 46 168 -32 35 21 32 34 57 18 36 17 39 34 2 19 134 0 0 34 56 7 15 37 24 47 169 -32 35 8 15 34 44 1 36 4 19 33 49 4 135 0 0 34 42 55 15 37 16 47 170 -32 34 55 3 34 30 50 35 51 4 33 35 56 136 0 0 34 29 50 15 37 9 47 172 -32 34 41 57 34 17 45 35 37 55 33 22 54 137 0 0 34 16 51 15 37 1 48 173 -32 34 28 57 34 4 47 35 24 53 33 9 58 138 0 0 34 3 58 15 36 54 48 175 -32 34 16 4 33 51 55 35 11 57 32 57 8 139 0 0 33 51 12 15 36 46 48 176 -32 34 3 18 33 39 9 34 59 8 32 44 25 140 0 0 33 38 34 15 36 38 49 177 -32 33 50 38 33 26 31 34 46 26 32 31 50 141 0 0 33 26 2 15 36 31 49 179 -32 33 38 6 33 14 0 34 33 51 32 19 22 142 0 0 33 13 38 15 36 23 49 180 -32 33 25 42 33 1 37 34 21 24 32 7 1 143 0 0 33 1 23 15 36 15 49 182 -32 33 13 25 32 49 22 34 9 5 31 54 48 144 0 0 32 49 15 15 36 7 49 183 -32 33 1 17 32 37 15 33 56 54 31 42 44 145 0 0 32 37 15 15 35 59 50 185 -32 32 49 17 32 25 16 33 44 51 31 30 48 146 0 0 32 25 25 15 35 51 50 186 -32 32 37 26 32 13 26 33 32 57 31 19 0 147 0 0 32 13 43 15 35 44 50 188 -32 32 25 43 32 1 45 33 21 11 31 7 22 148 0 0 32 2 10 15 35 36 50 189 -32 32 14 10 31 50 12 33 9 35 30 55 52 149 0 0 31 50 47 15 35 28 50 191 -31 32 2 46 31 38 50 32 58 8 30 44 32 150 0 0 31 39 33 15 35 20 50 192 -31 31 51 32 31 27 37 32 46 51 30 33 22 151 0 0 31 28 29 15 35 12 50 194 -31 31 40 27 31 16 33 32 35 44 30 22 21 152 0 0 31 17 36 15 35 4 50 195 -31 31 29 33 31 5 40 32 24 47 30 11 31 153 0 0 31 6 52 15 34 56 50 197 -31 31 18 49 30 54 58 32 14 0 30 0 50 154 0 0 30 56 19 15 34 48 50 198 -30 31 8 16 30 44 25 32 3 24 29 50 21 155 0 0 30 45 57 15 34 40 50 200 -30 30 57 53 30 34 4 31 52 59 29 40 2 156 0 0 30 35 46 15 34 32 50 201 -30 30 47 41 30 23 53 31 42 45 29 29 54 157 0 0 30 25 46 15 34 24 49 203 -30 30 37 41 30 13 54 31 32 41 29 19 57 158 0 0 30 15 58 15 34 16 49 204 -29 30 27 52 30 4 6 31 22 50 29 10 12 159 0 0 30 6 21 15 34 8 49 206 -29 30 18 15 29 54 30 31 13 10 29 0 38 160 0 0 29 56 56 15 34 0 49 207 -29 30 8 49 29 45 5 31 3 42 28 51 16 161 0 0 29 47 43 15 33 52 48 208 -28 29 59 36 29 35 53 30 54 26 28 42 6 162 0 0 29 38 42 15 33 45 48 210 -28 29 50 34 29 26 53 30 45 22 28 33 8 163 0 0 29 29 54 15 33 37 48 211 -27 29 41 45 29 18 5 30 36 30 28 24 22 164 0 0 29 21 18 15 33 29 48 213 -27 29 33 9 29 9 29 30 27 52 28 15 49 165 0 0 29 12 55 15 33 21 47 214 -27 29 24 45 29 1 7 30 19 26 28 7 29 166 0 0 29 4 45 15 33 13 47 215 -26 29 16 35 28 52 57 30 11 13 27 59 21 167 0 0 28 56 48 15 33 6 46 216 -26 29 8 37 28 45 0 30 3 13 27 51 27 168 0 0 28 49 4 15 32 58 46 218 -25 29 0 53 28 37 17 29 55 27 27 43 45 169 0 0 28 41 34 15 32 51 46 219 -25 28 53 22 28 29 47 29 47 54 27 36 17 170 0 0 28 34 17 15 32 43 45 220 -24 28 46 5 28 22 31 29 40 34 27 29 3 171 0 0 28 27 14 15 32 35 45 221 -24 28 39 1 28 15 28 29 33 29 27 22 2 172 0 0 28 20 25 15 32 28 44 222 -23 28 32 12 28 8 40 29 26 38 27 15 15 173 0 0 28 13 50 15 32 21 44 224 -23 28 25 37 28 2 5 29 20 0 27 8 42 174 0 0 28 7 29 15 32 13 43 225 -22 28 19 15 27 55 44 29 13 37 27 2 24 175 0 0 28 1 22 15 32 6 43 226 -22 28 13 8 27 49 38 29 7 29 26 56 19 176 0 0 27 55 30 15 31 59 42 227 -21 28 7 16 27 43 46 29 1 34 26 50 29 177 0 0 27 49 53 15 31 52 42 228 -21 28 1 38 27 38 9 28 55 55 26 44 53 178 0 0 27 44 30 15 31 45 41 229 -20 27 56 15 27 32 47 28 50 30 26 39 32 179 0 0 27 39 22 15 31 38 40 230 -19 27 51 6 27 27 39 28 45 21 26 34 26 180 0 0 27 34 29 15 31 31 40 231 -19 27 46 13 27 22 46 28 40 26 26 29 34 -179 0 0 27 29 51 15 31 24 39 232 -18 27 41 35 27 18 8 28 35 46 26 24 57 -178 0 0 27 25 28 15 31 18 39 233 -18 27 37 12 27 13 46 28 31 22 26 20 36 -177 0 0 27 21 20 15 31 11 38 234 -17 27 33 4 27 9 38 28 27 13 26 16 30 -176 0 0 27 17 28 15 31 5 37 234 -16 27 29 11 27 5 46 28 23 20 26 12 38 -175 0 0 27 13 51 15 30 58 37 235 -16 27 25 34 27 2 10 28 19 42 26 9 3 -174 0 0 27 10 30 15 30 52 36 236 -15 27 22 13 26 58 49 28 16 20 26 5 42 -173 0 0 27 7 24 15 30 46 35 237 -14 27 19 7 26 55 43 28 13 13 26 2 38 -172 0 0 27 4 34 15 30 39 34 238 -14 27 16 17 26 52 54 28 10 22 25 59 49 -171 0 0 27 2 0 15 30 33 34 239 -13 27 13 43 26 50 20 28 7 48 25 57 15 -170 0 0 26 59 42 15 30 28 33 239 -12 27 11 25 26 48 1 28 5 29 25 54 57 -169 0 0 26 57 40 15 30 22 32 240 -12 27 9 22 26 45 59 28 3 26 25 52 55 -168 0 0 26 55 53 15 30 16 32 241 -11 27 7 36 26 44 13 28 1 39 25 51 9 -167 0 0 26 54 23 15 30 11 31 241 -10 27 6 5 26 42 42 28 0 9 25 49 39 -166 0 0 26 53 9 15 30 5 30 242 -9 27 4 51 26 41 28 27 58 54 25 48 25 -165 0 0 26 52 11 15 30 0 29 243 -9 27 3 53 26 40 30 27 57 56 25 47 27 -164 0 0 26 51 29 15 29 55 28 244 -8 27 3 11 26 39 48 27 57 14 25 46 45 -163 0 0 26 51 3 15 29 50 28 244 -7 27 2 45 26 39 23 27 56 49 25 46 19 -162 0 0 26 50 54 15 29 45 27 245 -6 27 2 36 26 39 13 27 56 40 25 46 10 -161 0 0 26 51 0 15 29 40 26 245 -6 27 2 43 26 39 20 27 56 47 25 46 16 -160 0 0 26 51 24 15 29 35 25 246 -5 27 3 6 26 39 43 27 57 11 25 46 39 -159 0 0 26 52 3 15 29 31 25 247 -4 27 3 46 26 40 22 27 57 51 25 47 18 -158 0 0 26 52 59 15 29 26 24 247 -3 27 4 42 26 41 18 27 58 48 25 48 13 -157 0 0 26 54 11 15 29 22 23 248 -3 27 5 54 26 42 30 28 0 1 25 49 24 -156 0 0 26 55 40 15 29 18 22 248 -2 27 7 23 26 43 59 28 1 30 25 50 52 -155 0 0 26 57 25 15 29 14 21 249 -1 27 9 8 26 45 44 28 3 16 25 52 36 -154 0 0 26 59 26 15 29 10 20 249 0 27 11 10 26 47 45 28 5 19 25 54 36 Uncertainty in time = +/- 8 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 5724-02553-1 * constellation : Aquila * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 19 42 24.2312 DE: -07 49 44.401 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .020 ) * V mag [mag]: 10.5 * B mag [mag]: 11.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2649) Oongaq approx. diameter [km]: 33 approx. diameter ["]: .025 distance from Earth [AU]: 1.82200 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 618 number of rejected observations: 12 time covered by the observations: 1959 Dec 04 - 2008 Feb 16 1 sigma uncertainty ellipse (major, minor, PA): 0.069, 0.049, 73° remarks: * orbital elements for (2649) Oongaq : Mean anomaly = 250.56536586 deg Arg. of pericenter = 169.09624177 deg Long. of node = 245.49957156 deg Inclination = 12.19349240 deg Eccentricity = 0.14195451 Semimajor axis = 2.62758989 AU Perihelion dist = 2.25459165 AU Mag: H = 11.76, G = 0.15 Epoch of elements : MJD 55013.64900000 TDT (2009 Jul 01.649) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jul 1 2649 Oongaq 15h 35.3m UT 10.5 19 42 24.231- 7 49 44.40TYC 5724-02553-1 11.1 15.9 33 2.8 1.822 -2.128 6.03 141.9535 -7.830 -52.84 23.07 15.5883 0.12079 0.63095 -6.54898 1.25095 -0.00129 -0.00147 2000 249.7209792009 628.00000169.096242245.499572 12.1934920.14195451 2.6275899 2.254591711.8 5.00.15 RATE 2.3140230 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.073 0.053 75 3.29 0.057 0 54581.5020090701_2553-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 07:21 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org