IOTA/IOTA-ES occultation update for (1540) Kevola / TYC 6966-00148-1 event on 2009 Jul 06, 19:54 UT Visible from Summary ------- On 2009 Jul 06 UT, the 38 km diameter asteroid (1540) Kevola will occult a 10.8 mag star in the constellation Piscis Austrinus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.0 mag to 15.8 mag (the magnitude of the asteroid) for at most 5.8 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: 38 * date and approx. time of event: 2009 Jul 06, 19:47 - 2009 Jul 06, 20:08 UT * magnitude of target star: 10.8 * magnitude drop [mag]: 5.0 * estimated maximum duration [s]: 5.8 * Moon: 100 % sunlit, 54° distance * Sun: 131° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 43 * 1 sigma uncertainty interval [path widths]: +/- 1.74 * 1 sigma uncertainty interval [seconds]: +/- 9.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .043 +/- .034) * 1 sigma uncertainty ellipse (major, minor, PA): ( .044", .032", 71° ) * approx speed of asteroid's shadow [km/s]: 6.6544 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6966-00148-1 by 1540 Kevola on 2009 Jul 6 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude 155 15 38 - 2 4 40 19 47 13 47 233 0 155 27 53 - 2 4 37 155 3 25 - 2 4 42 156 10 45 - 2 4 13 154 21 10 - 2 4 36 154 44 2 - 3 31 24 19 47 34 48 234 -1 154 56 14 - 3 31 24 154 31 53 - 3 31 22 155 38 55 - 3 31 12 153 49 48 - 3 31 5 154 14 3 - 4 56 53 19 47 56 49 235 -2 154 26 12 - 4 56 56 154 1 56 - 4 56 49 155 8 44 - 4 56 56 153 19 58 - 4 56 21 153 45 33 - 6 21 15 19 48 17 51 236 -3 153 57 41 - 6 21 21 153 33 27 - 6 21 8 154 40 6 - 6 21 30 152 51 35 - 6 20 32 153 18 25 - 7 44 36 19 48 38 52 238 -4 153 30 32 - 7 44 45 153 6 20 - 7 44 27 154 12 55 - 7 45 3 152 24 30 - 7 43 42 152 52 35 - 9 7 2 19 48 59 53 239 -4 153 4 42 - 9 7 13 152 40 30 - 9 6 50 153 47 3 - 9 7 39 151 58 40 - 9 5 57 152 27 57 -10 28 37 19 49 20 54 240 -5 152 40 4 -10 28 50 152 15 52 -10 28 23 153 22 28 -10 29 24 151 34 0 -10 27 23 152 4 28 -11 49 27 19 49 41 54 242 -6 152 16 36 -11 49 42 151 52 22 -11 49 11 152 59 3 -11 50 22 151 10 25 -11 48 5 151 42 4 -13 9 35 19 50 2 55 243 -7 151 54 14 -13 9 52 151 29 56 -13 9 17 152 36 47 -13 10 39 150 47 53 -13 8 5 151 20 42 -14 29 6 19 50 23 56 245 -8 151 32 55 -14 29 24 151 8 31 -14 28 47 152 15 35 -14 30 17 150 26 20 -14 27 29 151 0 20 -15 48 4 19 50 45 57 247 -8 151 12 35 -15 48 23 150 48 6 -15 47 43 151 55 26 -15 49 21 150 5 45 -15 46 19 150 40 55 -17 6 31 19 51 6 58 248 -9 150 53 14 -17 6 52 150 28 38 -17 6 8 151 36 17 -17 7 55 149 46 5 -17 4 41 150 22 27 -18 24 31 19 51 27 58 250 -10 150 34 49 -18 24 54 150 10 5 -18 24 8 151 18 6 -18 26 1 149 27 18 -18 22 35 150 4 52 -19 42 8 19 51 48 59 252 -10 150 17 20 -19 42 32 149 52 27 -19 41 43 151 0 53 -19 43 43 149 9 23 -19 40 7 149 48 12 -20 59 24 19 52 9 59 254 -11 150 0 44 -20 59 48 149 35 41 -20 58 58 150 44 35 -21 1 4 148 52 19 -20 57 18 149 32 24 -22 16 22 19 52 30 60 256 -11 149 45 2 -22 16 47 149 19 47 -22 15 55 150 29 13 -22 18 6 148 36 5 -22 14 11 149 17 28 -23 33 4 19 52 51 60 259 -12 149 30 13 -23 33 31 149 4 45 -23 32 36 150 14 46 -23 34 53 148 20 41 -23 30 49 149 3 24 -24 49 34 19 53 13 61 261 -13 149 16 16 -24 50 2 148 50 34 -24 49 6 150 1 14 -24 51 27 148 6 6 -24 47 16 148 50 13 -26 5 54 19 53 34 61 263 -13 149 3 12 -26 6 22 148 37 15 -26 5 25 149 48 37 -26 7 50 147 52 21 -26 3 32 148 37 55 -27 22 6 19 53 55 61 265 -14 148 51 2 -27 22 35 148 24 49 -27 21 36 149 36 55 -27 24 5 147 39 26 -27 19 41 148 26 30 -28 38 13 19 54 16 61 268 -14 148 39 46 -28 38 42 148 13 15 -28 37 42 149 26 11 -28 40 14 147 27 21 -28 35 45 148 15 59 -29 54 16 19 54 37 61 270 -15 148 29 25 -29 54 46 148 2 35 -29 53 45 149 16 24 -29 56 20 147 16 7 -29 51 46 148 6 25 -31 10 20 19 54 58 61 272 -15 148 20 1 -31 10 50 147 52 50 -31 9 48 149 7 37 -31 12 25 147 5 46 -31 7 47 147 57 48 -32 26 24 19 55 19 61 275 -15 148 11 36 -32 26 55 147 44 2 -32 25 52 148 59 51 -32 28 31 146 56 19 -32 23 50 147 50 11 -33 42 33 19 55 41 61 277 -16 148 4 11 -33 43 4 147 36 13 -33 42 1 148 53 9 -33 44 41 146 47 48 -33 39 57 147 43 37 -34 58 48 19 56 2 61 279 -16 147 57 50 -34 59 20 147 29 26 -34 58 16 148 47 34 -35 0 57 146 40 16 -34 56 11 147 38 9 -36 15 12 19 56 23 61 282 -17 147 52 36 -36 15 43 147 23 43 -36 14 39 148 43 8 -36 17 20 146 33 45 -36 12 34 147 33 49 -37 31 47 19 56 44 61 284 -17 147 48 32 -37 32 18 147 19 9 -37 31 14 148 39 58 -37 33 55 146 28 18 -37 29 9 147 30 44 -38 48 35 19 57 5 60 286 -17 147 45 43 -38 49 6 147 15 47 -38 48 2 148 38 6 -38 50 42 146 24 0 -38 45 57 147 28 57 -40 5 38 19 57 26 60 288 -17 147 44 13 -40 6 9 147 13 42 -40 5 6 148 37 38 -40 7 44 146 20 55 -40 3 1 147 28 34 -41 23 0 19 57 47 59 290 -18 147 44 10 -41 23 30 147 13 1 -41 22 27 148 38 41 -41 25 3 146 19 8 -41 20 24 147 29 43 -42 40 42 19 58 9 59 292 -18 147 45 39 -42 41 11 147 13 49 -42 40 10 148 41 22 -42 42 42 146 18 45 -42 38 7 147 32 30 -43 58 47 19 58 30 58 294 -18 147 48 48 -43 59 16 147 16 14 -43 58 16 148 45 49 -44 0 44 146 19 54 -43 56 15 147 37 6 -45 17 17 19 58 51 57 296 -18 147 53 48 -45 17 45 147 20 26 -45 16 47 148 52 13 -45 19 10 146 22 43 -45 14 49 147 43 40 -46 36 16 19 59 12 57 297 -19 148 0 48 -46 36 43 147 26 34 -46 35 47 149 0 45 -46 38 3 146 27 22 -46 33 52 147 52 25 -47 55 46 19 59 33 56 299 -19 148 10 2 -47 56 12 147 34 51 -47 55 18 149 11 39 -47 57 26 146 34 1 -47 53 27 148 3 37 -49 15 49 19 59 54 55 300 -19 148 21 45 -49 16 13 147 45 32 -49 15 23 149 25 10 -49 17 22 146 42 55 -49 13 36 148 17 32 -50 36 29 20 0 15 54 301 -19 148 36 14 -50 36 51 147 58 53 -50 36 4 149 41 38 -50 37 52 146 54 20 -50 34 24 148 34 31 -51 57 48 20 0 37 53 302 -19 148 53 50 -51 58 8 148 15 16 -51 57 26 150 1 24 -51 59 0 147 8 35 -51 55 52 148 55 0 -53 19 49 20 0 58 52 303 -19 149 14 59 -53 20 6 148 35 3 -53 19 29 150 24 57 -53 20 47 147 26 2 -53 18 4 149 19 27 -54 42 35 20 1 19 51 304 -19 149 40 11 -54 42 48 148 58 45 -54 42 18 150 52 47 -54 43 17 147 47 9 -54 41 3 149 48 29 -56 6 8 20 1 40 50 305 -19 150 10 3 -56 6 18 149 26 57 -56 5 55 151 25 34 -56 6 32 148 12 28 -56 4 53 150 22 50 -57 30 31 20 2 1 49 305 -19 150 45 20 -57 30 36 150 0 23 -57 30 23 152 4 6 -57 30 33 148 42 42 -57 29 35 151 3 24 -58 55 47 20 2 22 48 306 -19 151 26 57 -58 55 46 150 39 55 -58 55 44 152 49 21 -58 55 21 149 18 40 -58 55 13 151 51 20 -60 21 56 20 2 43 47 306 -19 152 16 3 -60 21 48 151 26 41 -60 22 0 153 42 33 -60 20 58 150 1 24 -60 21 50 152 48 2 -61 48 59 20 3 5 46 306 -19 153 14 4 -61 48 43 152 22 4 -61 49 11 154 45 11 -61 47 22 150 52 14 -61 49 28 153 55 20 -63 16 56 20 3 26 44 306 -18 154 22 52 -63 16 30 153 27 52 -63 17 18 155 59 13 -63 14 32 151 52 50 -63 18 6 155 15 33 -64 45 44 20 3 47 43 305 -18 155 44 48 -64 45 6 154 46 22 -64 46 18 157 27 8 -64 42 22 153 5 24 -64 47 44 156 51 43 -66 15 16 20 4 8 41 305 -18 157 22 57 -66 14 22 156 20 35 -66 16 4 159 12 7 -66 10 42 154 32 46 -66 18 19 158 47 53 -67 45 20 20 4 29 40 303 -18 159 21 22 -67 44 8 158 14 27 -67 46 27 161 18 25 -67 39 17 156 18 42 -67 49 43 161 9 23 -69 15 37 20 4 50 38 302 -17 161 45 29 -69 14 1 160 33 19 -69 17 8 163 51 35 -69 7 41 158 28 21 -69 21 41 164 3 30 -70 45 33 20 5 11 37 300 -17 164 42 38 -70 43 26 163 24 24 -70 47 34 166 59 5 -70 35 12 161 8 42 -70 53 46 167 40 7 -72 14 13 20 5 33 35 297 -16 168 22 42 -72 11 26 166 57 32 -72 16 53 170 50 50 -72 0 46 164 29 27 -72 25 14 172 12 35 -73 40 7 20 5 54 33 293 -16 172 58 59 -73 36 27 171 26 8 -73 43 38 175 39 49 -73 22 38 168 44 4 -73 54 50 177 58 31 -75 0 49 20 6 15 31 288 -15 178 48 49 -74 56 0 177 8 1 -75 5 28 -178 17 35 -74 38 2 174 11 1 -75 20 27 -174 40 43 -76 12 21 20 6 36 29 281 -14 -173 47 0 -76 6 2 -175 34 47 -76 18 30 -170 42 56 -75 42 40 -178 45 39 -76 38 31 -165 23 53 -77 8 33 20 6 57 27 272 -13 -164 28 36 -77 0 17 -166 19 47 -77 16 37 -161 20 42 -76 30 3 -169 38 58 -77 43 13 -154 1 53 -77 40 16 20 7 18 24 261 -12 -153 8 41 -77 29 37 -154 55 53 -77 50 43 -150 9 21 -76 51 0 -158 10 16 -78 25 33 -140 56 57 -77 35 36 20 7 39 22 249 -11 -140 10 47 -77 22 12 -141 43 53 -77 48 48 -137 35 30 -76 33 53 -144 33 44 -78 33 10 -127 11 39 -76 40 55 20 8 1 19 235 -9 -126 36 1 -76 24 24 -127 47 41 -76 57 12 -124 34 37 -75 24 47 -129 56 49 -77 52 2 -114 0 46 -74 39 38 20 8 22 15 223 -7 -113 34 47 -74 18 55 -114 26 34 -74 59 55 -112 2 15 -73 3 3 -115 55 23 -76 7 33 -101 54 1 -70 52 19 20 8 43 10 211 -4 -101 29 59 -70 21 42 -102 16 39 -71 21 29 - 99 51 10 -68 19 19 -103 26 46 -72 54 14 Uncertainty in time = +/- 11 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 6966-00148-1 * constellation : Piscis Austrinus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 22 38 35.9553 DE: -25 49 46.262 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .024, .023 ) * V mag [mag]: 10.8 * B mag [mag]: 11.3 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1540) Kevola approx. diameter [km]: 38 approx. diameter ["]: .023 distance from Earth [AU]: 2.28800 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 791 number of rejected observations: 42 time covered by the observations: 1926 Apr 14 - 2008 Mar 05 1 sigma uncertainty ellipse (major, minor, PA): 0.038, 0.023, 64° remarks: * orbital elements for (1540) Kevola : Mean anomaly = 148.11162819 deg Arg. of pericenter = 111.85726003 deg Long. of node = 52.70156886 deg Inclination = 11.94770389 deg Eccentricity = 0.08124544 Semimajor axis = 2.85432108 AU Perihelion dist = 2.62242051 AU Mag: H = 10.77, G = 0.15 Epoch of elements : MJD 55018.82900000 TDT (2009 Jul 06.829) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jul 6 1540 Kevola 19h 55.0m UT 10.8 22 38 35.955-25 49 46.26TYC 6966-00148-1 11.3 15.8 38 5.8 2.288 -0.333 -13.73 115.9787 -25.826 -117.53 22.61 19.9162 0.45368 -0.14755 -1.16564 -3.57048 -0.00415 -0.00060 2000 146.3071092009 628.00000111.857260 52.701569 11.9477040.08124544 2.8543211 2.622420510.8 5.00.15 RATE 2.0438540 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.044 0.032 71 2.74 0.040 0 54545.5020090706_0148-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 10:25 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org