IOTA/IOTA-ES occultation update for (4505) Okamura / TYC 6264-02190-1 event on 2007 Jul 02, 07:11 UT Visible from Canada, USA Summary ------- On 2007 Jul 02 UT, the 19 km diameter asteroid (4505) Okamura will occult a 9.5 mag star in the constellation Sagittarius for observers along a path across Canada, USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.0 mag to 15.5 mag (the magnitude of the asteroid) for at most 1.4 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: 12 * date and approx. time of event: 2007 Jul 02, 07:06 - 2007 Jul 02, 07:15 UT * magnitude of target star: 9.5 * magnitude drop [mag]: 6.0 * estimated maximum duration [s]: 1.4 * Moon: 97 % sunlit, 28° distance * Sun: 170° distance * rough path description: Canada, USA The occultation path -------------------- * approximate projected width [km]: 34 * 1 sigma uncertainty interval [path widths]: +/- 5.76 * 1 sigma uncertainty interval [seconds]: +/- 10.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .099 +/- .062) * 1 sigma uncertainty ellipse (major, minor, PA): ( .100", .062", 98° ) * approx speed of asteroid's shadow [km/s]: 13.2307 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6264-02190-1 by 4505 Okamura on 2007 Jul 02 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 ... .. .. 68 0 0 .. .. .. .. .. .. ... .. .. ... .. .. - 70 59 21 ... .. .. - 66 13 48 67 0 0 7 6 54 0 224 5 - 66 47 22 ... .. .. - 73 13 59 ... .. .. - 68 39 44 66 0 0 7 6 55 1 222 3 - 69 11 58 - 68 7 30 - 75 24 1 ... .. .. Latitude Latitude Latitude Latitude - 70 0 0 65 25 56 7 6 55 2 221 2 65 39 31 65 12 27 .. .. .. .. .. .. - 71 0 0 64 59 59 7 6 55 3 220 2 65 13 34 64 46 30 67 59 43 .. .. .. - 72 0 0 64 33 38 7 6 56 3 219 1 64 47 13 64 20 10 67 33 15 .. .. .. - 73 0 0 64 6 55 7 6 57 4 218 1 64 20 29 63 53 28 67 6 20 .. .. .. - 74 0 0 63 39 49 7 6 57 5 217 0 63 53 23 63 26 23 66 38 59 .. .. .. - 75 0 0 63 12 23 7 6 58 5 216 -1 63 25 55 62 58 58 66 11 14 .. .. .. - 76 0 0 62 44 36 7 6 59 6 216 -1 62 58 6 62 31 13 65 43 4 .. .. .. - 77 0 0 62 16 31 7 7 0 7 215 -2 62 29 59 62 3 9 65 14 31 .. .. .. - 78 0 0 61 48 7 7 7 1 7 214 -2 62 1 33 61 34 47 64 45 37 59 8 34 - 79 0 0 61 19 26 7 7 3 8 213 -3 61 32 50 61 6 9 64 16 22 58 40 18 - 80 0 0 60 50 30 7 7 4 9 212 -4 61 3 51 60 37 15 63 46 48 58 11 49 - 81 0 0 60 21 19 7 7 6 9 211 -4 60 34 37 60 8 7 63 16 57 57 43 8 - 82 0 0 59 51 54 7 7 8 10 210 -5 60 5 10 59 38 45 62 46 49 57 14 16 - 83 0 0 59 22 18 7 7 10 11 209 -6 59 35 30 59 9 12 62 16 26 56 45 14 - 84 0 0 58 52 31 7 7 12 11 208 -6 59 5 40 58 39 28 61 45 50 56 16 3 - 85 0 0 58 22 34 7 7 14 12 207 -7 58 35 40 58 9 35 61 15 2 55 46 44 - 86 0 0 57 52 29 7 7 16 13 207 -8 58 5 31 57 39 34 60 44 4 55 17 19 - 87 0 0 57 22 18 7 7 19 13 206 -8 57 35 15 57 9 26 60 12 57 54 47 49 - 88 0 0 56 52 0 7 7 21 14 205 -9 57 4 54 56 39 12 59 41 42 54 18 15 - 89 0 0 56 21 39 7 7 24 15 204 -9 56 34 29 56 8 55 59 10 21 53 48 38 - 90 0 0 55 51 15 7 7 27 15 203 -10 56 4 0 55 38 35 58 38 56 53 18 59 - 91 0 0 55 20 49 7 7 30 16 202 -11 55 33 30 55 8 13 58 7 28 52 49 20 - 92 0 0 54 50 23 7 7 33 17 201 -11 55 3 0 54 37 51 57 35 59 52 19 42 - 93 0 0 54 19 58 7 7 37 17 200 -12 54 32 30 54 7 31 57 4 30 51 50 5 - 94 0 0 53 49 35 7 7 41 18 199 -13 54 2 3 53 37 13 56 33 2 51 20 32 - 95 0 0 53 19 16 7 7 44 19 198 -13 53 31 40 53 6 58 56 1 38 50 51 3 - 96 0 0 52 49 2 7 7 48 19 197 -14 53 1 21 52 36 49 55 30 17 50 21 40 - 97 0 0 52 18 55 7 7 52 20 197 -14 52 31 9 52 6 46 54 59 3 49 52 23 - 98 0 0 51 48 54 7 7 56 21 196 -15 52 1 4 51 36 50 54 27 56 49 23 14 - 99 0 0 51 19 2 7 8 1 21 195 -16 51 31 7 51 7 2 53 56 57 48 54 14 -100 0 0 50 49 20 7 8 5 22 194 -16 51 1 20 50 37 25 53 26 8 48 25 23 -101 0 0 50 19 49 7 8 10 23 193 -17 50 31 45 50 7 58 52 55 30 47 56 43 -102 0 0 49 50 30 7 8 15 23 192 -17 50 2 21 49 38 43 52 25 5 47 28 16 -103 0 0 49 21 23 7 8 19 24 191 -18 49 33 10 49 9 42 51 54 53 47 0 1 -104 0 0 48 52 31 7 8 24 24 190 -18 49 4 13 48 40 54 51 24 55 46 32 0 -105 0 0 48 23 54 7 8 30 25 189 -19 48 35 31 48 12 21 50 55 13 46 4 14 -106 0 0 47 55 33 7 8 35 26 188 -19 48 7 5 47 44 5 50 25 47 45 36 43 -107 0 0 47 27 29 7 8 40 26 187 -20 47 38 57 47 16 5 49 56 40 45 9 29 -108 0 0 46 59 43 7 8 46 27 186 -20 47 11 6 46 48 23 49 27 51 44 42 33 -109 0 0 46 32 15 7 8 51 27 185 -21 46 43 34 46 21 0 48 59 21 44 15 55 -110 0 0 46 5 7 7 8 57 28 184 -21 46 16 22 45 53 57 48 31 12 43 49 36 -111 0 0 45 38 20 7 9 3 28 183 -21 45 49 30 45 27 14 48 3 25 43 23 36 -112 0 0 45 11 54 7 9 9 29 182 -22 45 23 0 45 0 52 47 36 0 42 57 58 -113 0 0 44 45 50 7 9 15 29 181 -22 44 56 52 44 34 52 47 8 58 42 32 40 -114 0 0 44 20 9 7 9 21 30 179 -22 44 31 7 44 9 14 46 42 19 42 7 45 -115 0 0 43 54 51 7 9 27 30 178 -23 44 5 45 43 44 0 46 16 6 41 43 12 -116 0 0 43 29 57 7 9 33 30 177 -23 43 40 47 43 19 11 45 50 17 41 19 3 -117 0 0 43 5 28 7 9 40 31 176 -23 43 16 14 42 54 45 45 24 54 40 55 17 -118 0 0 42 41 24 7 9 46 31 175 -24 42 52 7 42 30 45 44 59 58 40 31 56 -119 0 0 42 17 46 7 9 53 31 174 -24 42 28 25 42 7 11 44 35 29 40 9 0 -120 0 0 41 54 35 7 9 59 32 173 -24 42 5 10 41 44 3 44 11 28 39 46 29 -121 0 0 41 31 51 7 10 6 32 172 -24 41 42 22 41 21 23 43 47 55 39 24 25 -122 0 0 41 9 34 7 10 12 32 171 -24 41 20 2 40 59 9 43 24 51 39 2 47 -123 0 0 40 47 45 7 10 19 32 169 -24 40 58 10 40 37 24 43 2 16 38 41 37 -124 0 0 40 26 25 7 10 26 33 168 -25 40 36 47 40 16 7 42 40 10 38 20 53 -125 0 0 40 5 34 7 10 33 33 167 -25 40 15 52 39 55 19 42 18 35 38 0 38 -126 0 0 39 45 12 7 10 39 33 166 -25 39 55 27 39 35 0 41 57 31 37 40 51 -127 0 0 39 25 19 7 10 46 33 165 -25 39 35 32 39 15 10 41 36 57 37 21 33 -128 0 0 39 5 57 7 10 53 33 164 -25 39 16 7 38 55 51 41 16 55 37 2 44 -129 0 0 38 47 6 7 11 0 33 163 -25 38 57 12 38 37 2 40 57 25 36 44 25 -130 0 0 38 28 45 7 11 7 33 161 -25 38 38 49 38 18 44 40 38 27 36 26 35 -131 0 0 38 10 55 7 11 14 33 160 -25 38 20 56 38 0 57 40 20 1 36 9 15 -132 0 0 37 53 37 7 11 21 33 159 -25 38 3 35 37 43 41 40 2 8 35 52 26 -133 0 0 37 36 50 7 11 28 33 158 -25 37 46 47 37 26 57 39 44 48 35 36 8 -134 0 0 37 20 36 7 11 34 33 157 -25 37 30 30 37 10 45 39 28 1 35 20 21 -135 0 0 37 4 54 7 11 41 33 156 -24 37 14 45 36 55 5 39 11 48 35 5 4 -136 0 0 36 49 44 7 11 48 33 155 -24 36 59 34 36 39 58 38 56 9 34 50 20 -137 0 0 36 35 8 7 11 55 33 154 -24 36 44 55 36 25 23 38 41 4 34 36 7 -138 0 0 36 21 4 7 12 2 33 152 -24 36 30 49 36 11 22 38 26 33 34 22 27 -139 0 0 36 7 34 7 12 8 33 151 -24 36 17 17 35 57 53 38 12 36 34 9 18 -140 0 0 35 54 37 7 12 15 32 150 -23 36 4 18 35 44 58 37 59 14 33 56 42 -141 0 0 35 42 13 7 12 22 32 149 -23 35 51 53 35 32 36 37 46 27 33 44 39 -142 0 0 35 30 24 7 12 29 32 148 -23 35 40 2 35 20 48 37 34 16 33 33 8 -143 0 0 35 19 9 7 12 35 32 147 -23 35 28 45 35 9 35 37 22 39 33 22 11 -144 0 0 35 8 27 7 12 42 31 146 -22 35 18 2 34 58 55 37 11 38 33 11 47 -145 0 0 34 58 21 7 12 48 31 145 -22 35 7 54 34 48 49 37 1 12 33 1 56 -146 0 0 34 48 48 7 12 55 31 144 -22 34 58 20 34 39 18 36 51 22 32 52 38 -147 0 0 34 39 50 7 13 1 30 143 -21 34 49 22 34 30 22 36 42 8 32 43 54 -148 0 0 34 31 28 7 13 7 30 142 -21 34 40 58 34 22 0 36 33 30 32 35 44 -149 0 0 34 23 40 7 13 13 30 141 -20 34 33 9 34 14 13 36 25 28 32 28 8 -150 0 0 34 16 27 7 13 20 29 140 -20 34 25 55 34 7 1 36 18 2 32 21 6 -151 0 0 34 9 49 7 13 26 29 139 -19 34 19 16 34 0 24 36 11 13 32 14 38 -152 0 0 34 3 46 7 13 32 28 138 -19 34 13 13 33 54 22 36 5 0 32 8 45 -153 0 0 33 58 19 7 13 37 28 138 -18 34 7 45 33 48 56 35 59 24 32 3 25 -154 0 0 33 53 28 7 13 43 27 137 -18 34 2 53 33 44 5 35 54 24 31 58 41 -155 0 0 33 49 12 7 13 49 27 136 -17 33 58 36 33 39 49 35 50 1 31 54 30 -156 0 0 33 45 31 7 13 55 26 135 -17 33 54 56 33 36 9 35 46 15 31 50 55 -157 0 0 33 42 27 7 14 0 26 134 -16 33 51 51 33 33 5 35 43 6 31 47 54 -158 0 0 33 39 58 7 14 5 25 133 -16 33 49 22 33 30 37 35 40 34 31 45 28 -159 0 0 33 38 5 7 14 11 25 132 -15 33 47 29 33 28 44 35 38 39 31 43 37 -160 0 0 33 36 48 7 14 16 24 132 -15 33 46 12 33 27 27 35 37 21 31 42 21 -161 0 0 33 36 8 7 14 21 24 131 -14 33 45 31 33 26 47 35 36 41 31 41 40 -162 0 0 33 36 3 7 14 26 23 130 -13 33 45 27 33 26 42 35 36 38 31 41 34 -163 0 0 33 36 35 7 14 31 22 129 -13 33 45 58 33 27 13 35 37 12 31 42 4 -164 0 0 33 37 42 7 14 35 22 129 -12 33 47 6 33 28 21 35 38 23 31 43 8 -165 0 0 33 39 26 7 14 40 21 128 -11 33 48 51 33 30 4 35 40 12 31 44 48 -166 0 0 33 41 47 7 14 44 20 127 -11 33 51 12 33 32 24 35 42 39 31 47 3 -167 0 0 33 44 43 7 14 48 20 126 -10 33 54 9 33 35 20 35 45 43 31 49 53 -168 0 0 33 48 17 7 14 53 19 126 -9 33 57 43 33 38 53 35 49 25 31 53 19 -169 0 0 33 52 26 7 14 57 18 125 -9 34 1 53 33 43 2 35 53 44 31 57 20 -170 0 0 33 57 12 7 15 0 17 124 -8 34 6 40 33 47 47 35 58 41 32 1 57 -171 0 0 34 2 35 7 15 4 17 124 -7 34 12 3 33 53 8 36 4 16 32 7 9 -172 0 0 34 8 33 7 15 8 16 123 -6 34 18 3 33 59 6 36 10 28 32 12 56 -173 0 0 34 15 9 7 15 11 15 122 -6 34 24 39 34 5 41 36 17 18 32 19 19 -174 0 0 34 22 21 7 15 14 15 122 -5 34 31 52 34 12 51 36 24 46 32 26 17 -175 0 0 34 30 9 7 15 17 14 121 -4 34 39 42 34 20 38 36 32 51 32 33 51 -176 0 0 34 38 33 7 15 20 13 120 -3 34 48 8 34 29 2 36 41 34 32 42 0 -177 0 0 34 47 34 7 15 23 12 120 -3 34 57 10 34 38 1 36 50 55 32 50 44 -178 0 0 34 57 12 7 15 26 11 119 -2 35 6 49 34 47 37 37 0 53 33 0 4 -179 0 0 35 7 26 7 15 28 11 119 -1 35 17 4 34 57 49 37 11 29 33 9 59 -180 0 0 35 18 15 7 15 30 10 118 0 35 27 56 35 8 37 37 22 42 33 20 29 179 0 0 35 29 41 7 15 32 9 117 0 35 39 24 35 20 1 37 34 33 33 31 34 178 0 0 35 41 44 7 15 34 8 117 1 35 51 28 35 32 2 37 47 1 .. .. .. 177 0 0 35 54 22 7 15 36 7 116 2 36 4 8 35 44 38 38 0 6 .. .. .. 176 0 0 36 7 36 7 15 38 7 116 3 36 17 24 35 57 50 38 13 49 .. .. .. 175 0 0 36 21 25 7 15 39 6 115 4 36 31 16 36 11 37 38 28 9 .. .. .. 174 0 0 36 35 51 7 15 40 5 114 5 36 45 44 36 26 0 38 43 5 .. .. .. 173 0 0 36 50 52 7 15 41 4 114 5 37 0 47 36 40 59 38 58 39 .. .. .. 172 0 0 37 6 28 7 15 42 3 113 6 37 16 26 36 56 32 39 14 49 .. .. .. 171 0 0 37 22 39 7 15 43 2 113 7 37 32 39 37 12 41 39 31 35 .. .. .. 170 0 0 37 39 25 7 15 43 2 112 8 37 49 28 37 29 25 39 48 58 .. .. .. 169 0 0 37 56 46 7 15 43 1 111 9 38 6 52 37 46 43 .. .. .. .. .. .. Data for the target star ------------------------ * name: TYC 6264-02190-1 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 18 14 37.0515 DE: -16 17 55.803 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .021 ) * V mag [mag]: 9.5 * B mag [mag]: 10.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4505) Okamura approx. diameter [km]: 19 approx. diameter ["]: .012 distance from Earth [AU]: 2.10200 * orbital information: orbit source: Preston date of fit: 2007 Jun 28 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 494 number of rejected observations: 12 time covered by the observations: 1943 Mar 09 - 2007 Jun 28 1 sigma uncertainty ellipse (major, minor, PA): 0.098, 0.058, 98° remarks: * orbital elements for (4505) Okamura : Mean anomaly = 129.68562685 deg Arg. of pericenter = 22.21107301 deg Long. of node = 119.21811290 deg Inclination = 11.83431664 deg Eccentricity = 0.04795498 Semimajor axis = 3.01319953 AU Perihelion dist = 2.86870161 AU Mag: H = 11.21, G = 0.15 Epoch of elements : MJD 54283.30000000 TDT (2007 Jul 02.300) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Jul 02 4505 Okamura 7h 11.3m UT 9.5 18 14 37.051-16 17 55.80TYC 6264-02190-1 10.4 15.5 19 1.4 2.102 -2.078 -8.96 245.877 -16.295 73.16 23.06 7.1884 -.23917 .79865 -7.15417 -2.14129 0.00063 -0.00067 2000 129.0637902007 629.00000 22.211073119.218113 11.8343170.047954983.013199532.8687016111.15 0.15 RATE 1.8843530 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.100 0.062 97.7 6.760 0.072 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Jun 29, 01:55 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org