IOTA/IOTA-ES occultation update for (3334) Somov / TYC 6844-02016-1 event on 2008 Jun 01, 12:43 UT Visible from Hawaii Summary ------- On 2008 Jun 01 UT, the 15 km diameter asteroid (3334) Somov will occult a 9.3 mag star in the constellation Sagittarius for observers along a path across Hawaii. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.6 mag to 15.9 mag (the magnitude of the asteroid) for at most 1.6 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: 2008 Jun 01, 12:35 - 2008 Jun 01, 12:51 UT * midpoint of event [JD]: 2454619.03006667 * magnitude of target star: 9.3 * magnitude drop [mag]: 6.6 * estimated maximum duration [s]: 1.6 * Moon: 8 % sunlit, 125° distance * Sun: 157° distance * rough path description: Hawaii The occultation path -------------------- * approximate projected width [km]: 20 * 1 sigma uncertainty interval [path widths]: +/- 5.72 * 1 sigma uncertainty interval [seconds]: +/- 12.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .096 +/- .062) * 1 sigma uncertainty ellipse (major, minor, PA): ( .096", .062", 91° ) * approx speed of asteroid's shadow [km/s]: 8.9883 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6844-02016-1 by 3334 Somov on 2008 Jun 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 118 0 0 30 58 56 12 51 57 1 118 -20 31 5 17 30 52 36 32 18 52 .. .. .. 119 0 0 30 32 27 12 51 56 2 119 -20 30 38 47 30 26 9 31 52 4 .. .. .. 120 0 0 30 6 20 12 51 56 3 119 -21 30 12 38 30 0 3 31 25 38 .. .. .. 121 0 0 29 40 35 12 51 55 4 120 -22 29 46 52 29 34 19 30 59 34 .. .. .. 122 0 0 29 15 13 12 51 53 5 120 -23 29 21 29 29 8 59 30 33 54 .. .. .. 123 0 0 28 50 15 12 51 52 6 121 -24 28 56 29 28 44 2 30 8 37 .. .. .. 124 0 0 28 25 41 12 51 50 7 121 -25 28 31 53 28 19 29 29 43 44 27 9 25 125 0 0 28 1 31 12 51 48 8 121 -26 28 7 42 27 55 21 29 19 17 26 45 33 126 0 0 27 37 47 12 51 46 9 122 -27 27 43 57 27 31 38 28 55 14 26 22 5 127 0 0 27 14 28 12 51 43 10 122 -28 27 20 37 27 8 21 28 31 38 25 59 3 128 0 0 26 51 36 12 51 41 10 123 -29 26 57 43 26 45 30 28 8 28 25 36 27 129 0 0 26 29 10 12 51 38 11 123 -29 26 35 15 26 23 5 27 45 45 25 14 17 130 0 0 26 7 11 12 51 34 12 124 -30 26 13 15 26 1 8 27 23 29 24 52 34 131 0 0 25 45 39 12 51 31 13 124 -31 25 51 42 25 39 37 27 1 40 24 31 18 132 0 0 25 24 36 12 51 27 14 125 -32 25 30 37 25 18 35 26 40 20 24 10 30 133 0 0 25 4 0 12 51 23 15 125 -33 25 10 0 24 58 0 26 19 28 23 50 9 134 0 0 24 43 52 12 51 19 16 126 -34 24 49 51 24 37 54 25 59 5 23 30 17 135 0 0 24 24 14 12 51 14 17 126 -34 24 30 12 24 18 17 25 39 11 23 10 53 136 0 0 24 5 4 12 51 9 18 127 -35 24 11 1 23 59 8 25 19 46 22 51 57 137 0 0 23 46 24 12 51 4 19 127 -36 23 52 19 23 40 29 25 0 50 22 33 31 138 0 0 23 28 12 12 50 59 20 128 -37 23 34 7 23 22 19 24 42 25 22 15 33 139 0 0 23 10 31 12 50 53 21 128 -37 23 16 24 23 4 38 24 24 29 21 58 5 140 0 0 22 53 20 12 50 48 21 129 -38 22 59 12 22 47 28 24 7 4 21 41 7 141 0 0 22 36 38 12 50 42 22 129 -39 22 42 29 22 30 48 23 50 9 21 24 38 142 0 0 22 20 27 12 50 36 23 130 -39 22 26 17 22 14 38 23 33 45 21 8 39 143 0 0 22 4 47 12 50 29 24 130 -40 22 10 36 21 58 58 23 17 52 20 53 11 144 0 0 21 49 37 12 50 23 25 131 -41 21 55 25 21 43 49 23 2 29 20 38 12 145 0 0 21 34 57 12 50 16 26 131 -41 21 40 44 21 29 11 22 47 38 20 23 44 146 0 0 21 20 49 12 50 9 27 132 -42 21 26 35 21 15 3 22 33 18 20 9 46 147 0 0 21 7 11 12 50 2 27 133 -43 21 12 57 21 1 26 22 19 29 19 56 19 148 0 0 20 54 4 12 49 54 28 133 -43 20 59 49 20 48 20 22 6 12 19 43 22 149 0 0 20 41 29 12 49 47 29 134 -44 20 47 13 20 35 46 21 53 26 19 30 57 150 0 0 20 29 25 12 49 39 30 134 -44 20 35 8 20 23 42 21 41 12 19 19 2 151 0 0 20 17 52 12 49 31 31 135 -45 20 23 34 20 12 10 21 29 30 19 7 38 152 0 0 20 6 50 12 49 23 31 136 -45 20 12 32 20 1 9 21 18 19 18 56 45 153 0 0 19 56 20 12 49 15 32 136 -46 20 2 1 19 50 40 21 7 40 18 46 23 154 0 0 19 46 22 12 49 7 33 137 -46 19 52 2 19 40 42 20 57 33 18 36 32 155 0 0 19 36 54 12 48 58 34 138 -47 19 42 34 19 31 15 20 47 58 18 27 12 156 0 0 19 27 59 12 48 49 34 138 -47 19 33 38 19 22 20 20 38 55 18 18 24 157 0 0 19 19 35 12 48 41 35 139 -47 19 25 13 19 13 57 20 30 24 18 10 6 158 0 0 19 11 42 12 48 32 36 140 -48 19 17 20 19 6 5 20 22 25 18 2 20 159 0 0 19 4 21 12 48 23 36 141 -48 19 9 59 18 58 44 20 14 58 17 55 5 160 0 0 18 57 32 12 48 13 37 141 -48 19 3 9 18 51 55 20 8 3 17 48 21 161 0 0 18 51 14 12 48 4 38 142 -49 18 56 51 18 45 38 20 1 39 17 42 8 162 0 0 18 45 28 12 47 54 38 143 -49 18 51 4 18 39 52 19 55 48 17 36 27 163 0 0 18 40 14 12 47 45 39 144 -49 18 45 50 18 34 38 19 50 30 17 31 17 164 0 0 18 35 31 12 47 35 39 145 -49 18 41 6 18 29 56 19 45 43 17 26 38 165 0 0 18 31 20 12 47 25 40 146 -49 18 36 55 18 25 45 19 41 28 17 22 30 166 0 0 18 27 40 12 47 15 41 147 -49 18 33 15 18 22 6 19 37 45 17 18 54 167 0 0 18 24 32 12 47 5 41 147 -50 18 30 7 18 18 58 19 34 34 17 15 49 168 0 0 18 21 56 12 46 55 42 148 -50 18 27 30 18 16 22 19 31 55 17 13 15 169 0 0 18 19 51 12 46 45 42 149 -50 18 25 25 18 14 17 19 29 48 17 11 12 170 0 0 18 18 18 12 46 34 43 150 -50 18 23 52 18 12 44 19 28 13 17 9 40 171 0 0 18 17 16 12 46 24 43 151 -50 18 22 50 18 11 42 19 27 10 17 8 39 172 0 0 18 16 46 12 46 13 44 153 -49 18 22 20 18 11 12 19 26 39 17 8 10 173 0 0 18 16 47 12 46 3 44 154 -49 18 22 21 18 11 13 19 26 40 17 8 12 174 0 0 18 17 20 12 45 52 44 155 -49 18 22 54 18 11 46 19 27 13 17 8 44 175 0 0 18 18 24 12 45 41 45 156 -49 18 23 58 18 12 50 19 28 17 17 9 48 176 0 0 18 19 59 12 45 30 45 157 -49 18 25 33 18 14 25 19 29 53 17 11 22 177 0 0 18 22 6 12 45 19 45 158 -49 18 27 40 18 16 32 19 32 1 17 13 28 178 0 0 18 24 44 12 45 8 46 159 -48 18 30 18 18 19 10 19 34 41 17 16 4 179 0 0 18 27 53 12 44 57 46 160 -48 18 33 28 18 22 19 19 37 52 17 19 12 180 0 0 18 31 33 12 44 46 46 162 -48 18 37 8 18 25 59 19 41 35 17 22 50 -179 0 0 18 35 45 12 44 35 46 163 -48 18 41 20 18 30 10 19 45 49 17 26 59 -178 0 0 18 40 28 12 44 24 47 164 -47 18 46 3 18 34 53 19 50 35 17 31 38 -177 0 0 18 45 41 12 44 13 47 165 -47 18 51 17 18 40 6 19 55 53 17 36 49 -176 0 0 18 51 26 12 44 2 47 167 -46 18 57 2 18 45 51 20 1 41 17 42 29 -175 0 0 18 57 41 12 43 51 47 168 -46 19 3 18 18 52 6 20 8 1 17 48 41 -174 0 0 19 4 28 12 43 39 47 169 -45 19 10 4 18 58 52 20 14 53 17 55 23 -173 0 0 19 11 45 12 43 28 47 170 -45 19 17 22 19 6 9 20 22 15 18 2 35 -172 0 0 19 19 33 12 43 17 47 172 -45 19 25 10 19 13 56 20 30 9 18 10 17 -171 0 0 19 27 52 12 43 6 47 173 -44 19 33 29 19 22 14 20 38 33 18 18 30 -170 0 0 19 36 41 12 42 54 47 174 -43 19 42 19 19 31 3 20 47 29 18 27 13 -169 0 0 19 46 0 12 42 43 47 176 -43 19 51 39 19 40 22 20 56 55 18 36 26 -168 0 0 19 55 50 12 42 32 47 177 -42 20 1 30 19 50 11 21 6 53 18 46 9 -167 0 0 20 6 10 12 42 21 47 178 -42 20 11 51 20 0 31 21 17 20 18 56 22 -166 0 0 20 17 1 12 42 9 46 179 -41 20 22 42 20 11 21 21 28 19 19 7 5 -165 0 0 20 28 21 12 41 58 46 181 -40 20 34 3 20 22 40 21 39 48 19 18 18 -164 0 0 20 40 12 12 41 47 46 182 -40 20 45 54 20 34 30 21 51 47 19 30 0 -163 0 0 20 52 32 12 41 36 46 183 -39 20 58 15 20 46 50 22 4 17 19 42 12 -162 0 0 21 5 22 12 41 25 46 185 -38 21 11 6 20 59 39 22 17 16 19 54 53 -161 0 0 21 18 42 12 41 14 45 186 -38 21 24 26 21 12 58 22 30 46 20 8 3 -160 0 0 21 32 31 12 41 3 45 187 -37 21 38 16 21 26 46 22 44 45 20 21 42 -159 0 0 21 46 49 12 40 52 45 188 -36 21 52 35 21 41 3 22 59 14 20 35 50 -158 0 0 22 1 36 12 40 41 44 189 -36 22 7 23 21 55 50 23 14 12 20 50 27 -157 0 0 22 16 53 12 40 30 44 190 -35 22 22 40 22 11 5 23 29 40 21 5 33 -156 0 0 22 32 38 12 40 19 43 192 -34 22 38 26 22 26 50 23 45 37 21 21 7 -155 0 0 22 48 51 12 40 9 43 193 -33 22 54 41 22 43 2 24 2 3 21 37 9 -154 0 0 23 5 33 12 39 58 42 194 -33 23 11 24 22 59 43 24 18 58 21 53 40 -153 0 0 23 22 44 12 39 48 42 195 -32 23 28 35 23 16 53 24 36 21 22 10 38 -152 0 0 23 40 22 12 39 37 41 196 -31 23 46 14 23 34 30 24 54 12 22 28 3 -151 0 0 23 58 28 12 39 27 41 197 -30 24 4 21 23 52 35 25 12 31 22 45 57 -150 0 0 24 17 1 12 39 17 40 198 -29 24 22 56 24 11 7 25 31 18 23 4 17 -149 0 0 24 36 1 12 39 6 40 199 -28 24 41 57 24 30 6 25 50 33 23 23 4 -148 0 0 24 55 29 12 38 56 39 200 -28 25 1 26 24 49 32 26 10 15 23 42 18 -147 0 0 25 15 23 12 38 47 39 201 -27 25 21 21 25 9 25 26 30 24 24 1 58 -146 0 0 25 35 43 12 38 37 38 202 -26 25 41 42 25 29 44 26 50 59 24 22 4 -145 0 0 25 56 29 12 38 27 37 203 -25 26 2 30 25 50 29 27 12 1 24 42 36 -144 0 0 26 17 41 12 38 18 37 204 -24 26 23 43 26 11 40 27 33 28 25 3 33 -143 0 0 26 39 18 12 38 8 36 205 -23 26 45 21 26 33 16 27 55 21 25 24 55 -142 0 0 27 1 20 12 37 59 35 206 -22 27 7 24 26 55 16 28 17 39 25 46 42 -141 0 0 27 23 46 12 37 50 35 206 -22 27 29 52 27 17 41 28 40 22 26 8 53 -140 0 0 27 46 37 12 37 41 34 207 -21 27 52 43 27 40 31 29 3 29 26 31 28 -139 0 0 28 9 51 12 37 33 33 208 -20 28 15 59 28 3 43 29 27 0 26 54 27 -138 0 0 28 33 28 12 37 24 32 209 -19 28 39 37 28 27 19 29 50 54 27 17 48 -137 0 0 28 57 28 12 37 16 32 210 -18 29 3 38 28 51 18 30 15 11 27 41 32 -136 0 0 29 21 50 12 37 8 31 211 -17 29 28 2 29 15 38 30 39 50 28 5 37 -135 0 0 29 46 33 12 37 0 30 211 -16 29 52 47 29 40 20 31 4 51 28 30 4 -134 0 0 30 11 38 12 36 52 29 212 -15 30 17 53 30 5 24 31 30 13 28 54 53 -133 0 0 30 37 3 12 36 44 28 213 -14 30 43 19 30 30 47 31 55 56 29 20 1 -132 0 0 31 2 48 12 36 37 28 214 -13 31 9 5 30 56 31 32 21 59 29 45 30 -131 0 0 31 28 52 12 36 29 27 214 -12 31 35 11 31 22 34 32 48 21 30 11 17 -130 0 0 31 55 15 12 36 22 26 215 -12 32 1 36 31 48 55 33 15 2 30 37 24 -129 0 0 32 21 56 12 36 16 25 216 -11 32 28 18 32 15 35 33 42 1 31 3 48 -128 0 0 32 48 54 12 36 9 24 216 -10 32 55 17 32 42 32 34 9 17 31 30 29 -127 0 0 33 16 9 12 36 3 23 217 -9 33 22 34 33 9 45 34 36 50 31 57 28 -126 0 0 33 43 40 12 35 56 23 218 -8 33 50 6 33 37 15 35 4 38 32 24 42 -125 0 0 34 11 25 12 35 51 22 219 -7 34 17 53 34 4 59 35 32 42 32 52 11 -124 0 0 34 39 25 12 35 45 21 219 -6 34 45 54 34 32 58 36 1 0 33 19 55 -123 0 0 35 7 39 12 35 39 20 220 -5 35 14 9 35 1 10 36 29 31 33 47 52 -122 0 0 35 36 5 12 35 34 19 221 -4 35 42 37 35 29 35 36 58 14 34 16 2 -121 0 0 36 4 43 12 35 29 18 221 -3 36 11 16 35 58 11 37 27 9 34 44 24 -120 0 0 36 33 32 12 35 24 17 222 -2 36 40 6 36 26 59 37 56 15 35 12 57 -119 0 0 37 2 31 12 35 20 16 223 -1 37 9 6 36 55 56 38 25 31 35 41 41 -118 0 0 37 31 39 12 35 16 16 223 0 37 38 16 37 25 3 38 54 55 36 10 34 Uncertainty in time = +/- 14 secs [Prediction of 2008 Apr 27.0] Data for the target star ------------------------ * name: TYC 6844-02016-1 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 18 20 35.9041 DE: -23 19 49.826 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .021 ) * V mag [mag]: 9.3 * B mag [mag]: 9.4 * Apparent position with proper motion RA(deg): 275.2860232734 DE(deg): -23.3278552377 * Equation of equinoxes (radians) : 0.000041295195301 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3334) Somov approx. diameter [km]: 15 approx. diameter ["]: .011 distance from Earth [AU]: 1.81600 * orbital information: orbit source: Preston date of fit: 2008 Apr 22 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 734 number of rejected observations: 20 time covered by the observations: 1942 Nov 05 - 2007 Jul 25 1 sigma uncertainty ellipse (major, minor, PA): 0.094, 0.058, 91° remarks: * orbital elements for (3334) Somov : Mean anomaly = 344.66223071 deg Arg. of pericenter = 195.91156234 deg Long. of node = 86.65974919 deg Inclination = 3.26214304 deg Eccentricity = 0.02766775 Semimajor axis = 2.85125122 AU Perihelion dist = 2.77236352 AU Mag: H = 11.65, G = 0.15 Epoch of elements : MJD 54618.53000000 TDT (2008 Jun 01.530) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jun 1 3334 Somov 12h 43.3m UT 9.3 18 20 35.904-23 19 49.83TYC 6844-02016-1 9.4 15.9 15 1.6 1.816 -1.765 -3.68 -166.0474 -23.329 -11.35 22.15 12.7216 -0.10150 0.67347 -5.01615 -0.75913 -0.00225 -0.00009 2000 342.9160072008 524.00000195.911562 86.659749 3.2621430.02766775 2.8512512 2.772363511.8 5.00.15 RATE 2.0471560 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.096 0.062 91 6.72 0.063 0 54583.5020080601_2016-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 27, 20:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org