IOTA/IOTA-ES occultation update for (192) Nausikaa / TYC 6891-02482-1 event on 2007 Nov 04, 02:04 UT Visible from NW USA, SW Canada Summary ------- On 2007 Nov 04 UT, the 103 km diameter asteroid (192) Nausikaa will occult a 11.6 mag star in the constellation Sagittarius for observers along a path across NW USA, SW Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.7 mag to 11.5 mag (the magnitude of the asteroid) for at most 3.8 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: 98 * date and approx. time of event: 2007 Nov 04, 02:02 - 2007 Nov 04, 02:06 UT * magnitude of target star: 11.6 * magnitude drop [mag]: 0.7 * estimated maximum duration [s]: 3.8 * Moon: 29 % sunlit, 139° distance * Sun: 74° distance * rough path description: NW USA, SW Canada The occultation path -------------------- * approximate projected width [km]: 188 * 1 sigma uncertainty interval [path widths]: +/- 0.37 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .025 +/- .026) * 1 sigma uncertainty ellipse (major, minor, PA): ( .026", .025", 358° ) * approx speed of asteroid's shadow [km/s]: 27.1846 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6891-02482-1 by 192 Nausikaa on 2007 Nov 04 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 ... .. .. 63 0 0 .. .. .. .. .. .. ... .. .. ... .. .. ... .. .. -105 9 21 -102 39 26 62 0 0 2 6 44 0 211 -24 ... .. .. -104 47 26 ... .. .. -106 23 13 -103 58 38 61 0 0 2 6 43 2 210 -24 -101 55 14 -106 3 31 ... .. .. -107 37 0 -105 17 23 60 0 0 2 6 43 3 209 -23 -103 16 51 -107 19 26 ... .. .. -108 50 51 -106 35 50 59 0 0 2 6 43 4 208 -23 -104 37 54 -108 35 20 ... .. .. -110 4 53 -107 54 9 58 0 0 2 6 42 5 207 -22 -105 58 33 -109 51 21 ... .. .. -111 19 14 -109 12 28 57 0 0 2 6 41 6 206 -22 -107 18 58 -111 7 36 ... .. .. -112 34 0 -110 30 56 56 0 0 2 6 40 8 205 -21 -108 39 18 -112 24 15 -107 17 42 -113 49 19 -111 49 41 55 0 0 2 6 38 9 204 -20 -109 59 44 -113 41 23 -108 39 23 -115 5 18 -113 8 52 54 0 0 2 6 37 10 202 -20 -111 20 22 -114 59 10 -110 1 8 -116 22 5 -114 28 36 53 0 0 2 6 35 11 201 -19 -112 41 23 -116 17 42 -111 23 7 -117 39 47 -115 49 3 52 0 0 2 6 33 13 200 -18 -114 2 54 -117 37 9 -112 45 29 -118 58 31 -117 10 20 51 0 0 2 6 31 14 199 -17 -115 25 4 -118 57 37 -114 8 21 -120 18 27 -118 32 37 50 0 0 2 6 28 15 198 -16 -116 48 3 -120 19 17 -115 31 54 -121 39 44 -119 56 3 49 0 0 2 6 26 16 196 -15 -118 12 0 -121 42 18 -116 56 17 -123 2 30 -121 20 47 48 0 0 2 6 23 17 195 -14 -119 37 3 -123 6 50 -118 21 38 -124 26 58 -122 47 2 47 0 0 2 6 19 19 194 -13 -121 3 25 -124 33 5 -119 48 10 -125 53 19 -124 14 57 46 0 0 2 6 16 20 193 -12 -122 31 15 -126 1 15 -121 16 1 -127 21 45 -125 44 48 45 0 0 2 6 12 21 191 -11 -124 0 47 -127 31 34 -122 45 24 -128 52 34 -127 16 48 44 0 0 2 6 8 22 190 -9 -125 32 14 -129 4 19 -124 16 33 -130 26 1 -128 51 14 43 0 0 2 6 4 23 188 -8 -127 5 50 -130 39 49 -125 49 40 -132 2 27 -130 28 26 42 0 0 2 5 59 25 187 -7 -128 41 55 -132 18 24 -127 25 4 -133 42 16 -132 8 46 41 0 0 2 5 54 26 185 -5 -130 20 47 -134 0 31 -129 3 2 -135 25 57 -133 52 40 40 0 0 2 5 48 27 183 -3 -132 2 50 -135 46 40 -130 43 55 -137 14 4 -135 40 41 39 0 0 2 5 42 28 181 -2 -133 48 31 -137 37 29 -132 28 8 -139 7 22 -137 33 28 38 0 0 2 5 36 29 179 0 -135 38 25 -139 33 46 -134 16 13 -141 6 45 -139 31 50 37 0 0 2 5 29 30 177 2 -137 33 11 -141 36 32 -136 8 44 -143 13 25 -141 36 52 36 0 0 2 5 21 31 175 4 -139 33 43 -143 47 6 -138 6 26 -145 29 0 Latitude Latitude Latitude Latitude -143 0 0 35 22 3 2 5 16 31 173 5 34 24 37 36 21 11 33 43 9 37 6 10 -144 0 0 34 55 38 2 5 13 32 172 6 33 58 39 35 54 17 33 17 28 36 38 53 -145 0 0 34 30 2 2 5 9 32 171 7 33 33 28 35 28 14 32 52 35 36 12 28 -146 0 0 34 5 16 2 5 5 32 170 8 33 9 7 35 3 1 32 28 31 35 46 54 -147 0 0 33 41 20 2 5 2 32 169 9 32 45 34 34 38 40 32 5 14 35 22 12 -148 0 0 33 18 13 2 4 58 33 168 10 32 22 50 34 15 9 31 42 45 34 58 22 -149 0 0 32 55 57 2 4 54 33 167 11 32 0 55 33 52 30 31 21 5 34 35 24 -150 0 0 32 34 31 2 4 50 33 165 12 31 39 50 33 30 42 31 0 14 34 13 18 -151 0 0 32 13 56 2 4 47 33 164 12 31 19 34 33 9 45 30 40 12 33 52 5 -152 0 0 31 54 11 2 4 43 33 163 13 31 0 8 32 49 40 30 20 59 33 31 44 -153 0 0 31 35 17 2 4 39 33 162 14 30 41 31 32 30 27 30 2 35 33 12 15 -154 0 0 31 17 14 2 4 35 33 161 15 30 23 45 32 12 6 29 45 0 32 53 39 -155 0 0 31 0 1 2 4 32 33 160 16 30 6 48 31 54 36 29 28 14 32 35 56 -156 0 0 30 43 39 2 4 28 33 159 17 29 50 41 31 37 58 29 12 18 32 19 5 -157 0 0 30 28 8 2 4 24 33 158 18 29 35 25 31 22 11 28 57 11 32 3 6 -158 0 0 30 13 28 2 4 20 33 157 19 29 20 58 31 7 17 28 42 54 31 48 0 -159 0 0 29 59 39 2 4 17 33 155 20 29 7 22 30 53 14 28 29 26 31 33 47 -160 0 0 29 46 41 2 4 13 32 154 20 28 54 35 30 40 3 28 16 48 31 20 26 -161 0 0 29 34 34 2 4 9 32 153 21 28 42 39 30 27 44 28 4 59 31 7 58 -162 0 0 29 23 17 2 4 6 32 152 22 28 31 33 30 16 17 27 54 0 30 56 22 -163 0 0 29 12 52 2 4 2 32 151 23 28 21 17 30 5 41 27 43 51 30 45 38 -164 0 0 29 3 17 2 3 59 31 150 24 28 11 51 29 55 57 27 34 31 30 35 47 -165 0 0 28 54 34 2 3 55 31 149 25 28 3 15 29 47 5 27 26 1 30 26 48 -166 0 0 28 46 41 2 3 52 31 148 25 27 55 29 29 39 4 27 18 20 30 18 41 -167 0 0 28 39 39 2 3 48 30 147 26 27 48 34 29 31 56 27 11 29 30 11 27 -168 0 0 28 33 27 2 3 45 30 146 27 27 42 28 29 25 38 27 5 27 30 5 5 -169 0 0 28 28 7 2 3 42 30 145 28 27 37 13 29 20 12 27 0 15 29 59 35 -170 0 0 28 23 37 2 3 38 29 144 28 27 32 47 29 15 38 26 55 53 29 54 57 -171 0 0 28 19 58 2 3 35 29 144 29 27 29 11 29 11 55 26 52 19 29 51 11 -172 0 0 28 17 10 2 3 32 28 143 30 27 26 26 29 9 4 26 49 36 29 48 18 -173 0 0 28 15 12 2 3 29 28 142 31 27 24 30 29 7 4 26 47 41 29 46 16 -174 0 0 28 14 4 2 3 26 27 141 31 27 23 24 29 5 55 26 46 36 29 45 6 -175 0 0 28 13 48 2 3 23 27 140 32 27 23 8 29 5 38 26 46 20 29 44 48 -176 0 0 28 14 22 2 3 20 26 139 33 27 23 41 29 6 12 26 46 54 29 45 22 -177 0 0 28 15 46 2 3 17 25 139 33 27 25 5 29 7 37 26 48 17 29 46 48 -178 0 0 28 18 0 2 3 14 25 138 34 27 27 18 29 9 54 26 50 29 29 49 6 -179 0 0 28 21 6 2 3 11 24 137 34 27 30 21 29 13 1 26 53 30 29 52 16 -180 0 0 28 25 1 2 3 8 23 136 35 27 34 13 29 17 0 26 57 20 29 56 17 179 0 0 28 29 47 2 3 6 23 136 35 27 38 55 29 21 49 27 2 0 30 1 10 178 0 0 28 35 23 2 3 3 22 135 36 27 44 27 29 27 30 27 7 28 30 6 54 177 0 0 28 41 49 2 3 1 21 134 36 27 50 48 29 34 2 27 13 45 30 13 30 176 0 0 28 49 5 2 2 58 21 133 37 27 57 58 29 41 25 27 20 52 30 20 58 175 0 0 28 57 12 2 2 56 20 133 37 28 5 58 29 49 38 27 28 47 30 29 17 174 0 0 29 6 9 2 2 54 19 132 38 28 14 47 29 58 43 27 37 31 30 38 28 173 0 0 29 15 55 2 2 52 18 131 38 28 24 26 30 8 39 27 47 4 30 48 31 172 0 0 29 26 32 2 2 50 18 131 38 28 34 54 30 19 25 27 57 26 30 59 24 171 0 0 29 37 59 2 2 48 17 130 39 28 46 11 30 31 2 28 8 36 31 11 10 170 0 0 29 50 15 2 2 46 16 130 39 28 58 17 30 43 29 28 20 35 31 23 46 169 0 0 30 3 21 2 2 44 15 129 39 29 11 12 30 56 48 28 33 22 31 37 14 168 0 0 30 17 17 2 2 42 14 128 40 29 24 56 31 10 57 28 46 58 31 51 33 167 0 0 30 32 3 2 2 40 14 128 40 29 39 29 31 25 56 29 1 22 32 6 44 166 0 0 30 47 38 2 2 39 13 127 40 29 54 50 31 41 46 29 16 34 32 22 45 165 0 0 31 4 3 2 2 38 12 127 40 30 11 1 31 58 27 29 32 34 32 39 38 164 0 0 31 21 17 2 2 36 11 126 40 30 28 0 32 15 57 29 49 23 32 57 22 163 0 0 31 39 21 2 2 35 10 125 40 30 45 47 32 34 18 30 6 59 33 15 56 162 0 0 31 58 13 2 2 34 9 125 40 31 4 23 32 53 29 30 25 23 33 35 22 161 0 0 32 17 55 2 2 33 8 124 40 31 23 47 33 13 30 30 44 34 33 55 38 160 0 0 32 38 25 2 2 32 7 124 40 31 43 58 33 34 20 31 4 33 34 16 45 159 0 0 32 59 45 2 2 31 7 123 40 32 4 58 33 56 1 31 25 19 34 38 42 158 0 0 33 21 52 2 2 30 6 123 40 32 26 45 34 18 31 .. .. .. 35 1 30 157 0 0 33 44 48 2 2 30 5 122 40 32 49 20 34 41 50 .. .. .. 35 25 8 156 0 0 34 8 33 2 2 29 4 122 40 33 12 42 35 5 59 .. .. .. 35 49 36 155 0 0 34 33 5 2 2 29 3 121 40 33 36 50 35 30 56 .. .. .. 36 14 54 154 0 0 34 58 24 2 2 28 2 120 39 .. .. .. 35 56 43 .. .. .. 36 41 1 153 0 0 35 24 32 2 2 28 1 120 39 .. .. .. 36 23 17 .. .. .. 37 7 58 152 0 0 35 51 26 2 2 28 0 119 39 .. .. .. .. .. .. .. .. .. .. .. .. Data for the target star ------------------------ * name: TYC 6891-02482-1 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 19 49 05.5551 DE: -23 19 07.146 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .022, .025 ) * V mag [mag]: 11.6 * B mag [mag]: 12.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (192) Nausikaa approx. diameter [km]: 103 approx. diameter ["]: .072 distance from Earth [AU]: 1.97500 * orbital information: orbit source: Preston date of fit: 2007 Oct 23 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1172 number of rejected observations: 147 time covered by the observations: 1907 Nov 05 - 2007 Sep 19 1 sigma uncertainty ellipse (major, minor, PA): 0.012, 0.008, 72° remarks: * orbital elements for (192) Nausikaa : Mean anomaly = 329.61677042 deg Arg. of pericenter = 30.07724223 deg Long. of node = 343.30959293 deg Inclination = 6.81576354 deg Eccentricity = 0.24560005 Semimajor axis = 2.40297791 AU Perihelion dist = 1.81280643 AU Mag: H = 7.08, G = 0.03 Epoch of elements : MJD 54408.08700000 TDT (2007 Nov 04.087) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Nov 04 192 Nausikaa 2h 4.6m UT 11.6 19 49 5.555-23 19 7.15TYC 6891-02482-1 12.5 11.5 103 3.8 1.975 4.733 20.46 223.176 -23.323 144.75 -15.21 2.0767 -.25096 .79830 14.63968 4.59465 0.00505 0.00088 2000 327.47700120071027.00000 30.077242343.309593 6.8157640.245600052.402977911.812806437.135 0.03 RATE 2.6459360 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.026 0.025 358.4 1.370 0.026 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Oct 23, 22:23 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org