IOTA/IOTA-ES occultation update for (752) Sulamitis / TYC 1945-01990-1 event on 2009 Apr 10, 23:09 UT Visible from Summary ------- On 2009 Apr 10 UT, the 63 km diameter asteroid (752) Sulamitis will occult a 11.1 mag star in the constellation Cancer for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.3 mag to 14.4 mag (the magnitude of the asteroid) for at most 6.0 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: 91 * date and approx. time of event: 2009 Apr 10, 23:06 - 2009 Apr 10, 23:17 UT * magnitude of target star: 11.1 * magnitude drop [mag]: 3.3 * estimated maximum duration [s]: 6.0 * Moon: 98 % sunlit, 92° distance * Sun: 105° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 76 * 1 sigma uncertainty interval [path widths]: +/- 0.50 * 1 sigma uncertainty interval [seconds]: +/- 3.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .023) * 1 sigma uncertainty ellipse (major, minor, PA): ( .030", .023", 95° ) * approx speed of asteroid's shadow [km/s]: 10.5327 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1945-01990-1 by 752 Sulamitis on 2009 Apr 10 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 - 58 0 0 64 16 4 23 6 32 51 176 0 63 52 48 64 39 28 63 29 39 65 2 58 - 57 0 0 64 1 56 23 6 37 51 178 -1 63 38 33 64 25 28 63 15 16 64 49 6 - 56 0 0 63 47 20 23 6 42 51 179 -1 63 23 49 64 10 59 63 0 24 64 34 46 - 55 0 0 63 32 15 23 6 47 52 181 -2 63 8 36 63 56 3 62 45 3 64 19 58 - 54 0 0 63 16 41 23 6 53 52 182 -2 62 52 53 63 40 37 62 29 13 64 4 40 - 53 0 0 63 0 36 23 6 58 52 184 -3 62 36 40 63 24 41 62 12 52 63 48 53 - 52 0 0 62 44 1 23 7 4 52 185 -3 62 19 57 63 8 14 61 56 0 63 32 35 - 51 0 0 62 26 55 23 7 9 53 187 -4 62 2 42 62 51 16 61 38 36 63 15 46 - 50 0 0 62 9 16 23 7 15 53 189 -5 61 44 54 62 33 46 61 20 40 62 58 25 - 49 0 0 61 51 5 23 7 21 53 190 -5 61 26 34 62 15 44 61 2 12 62 40 32 - 48 0 0 61 32 21 23 7 27 53 192 -6 61 7 41 61 57 9 60 43 10 62 22 6 - 47 0 0 61 13 2 23 7 33 54 193 -6 60 48 14 61 37 59 60 23 34 62 3 5 - 46 0 0 60 53 9 23 7 39 54 195 -7 60 28 12 61 18 16 60 3 23 61 43 31 - 45 0 0 60 32 41 23 7 46 54 197 -8 60 7 34 60 57 57 59 42 36 61 23 21 - 44 0 0 60 11 37 23 7 52 54 199 -8 59 46 21 60 37 2 59 21 14 61 2 36 - 43 0 0 59 49 56 23 7 59 54 200 -9 59 24 31 60 15 30 58 59 15 60 41 14 - 42 0 0 59 27 38 23 8 5 54 202 -9 59 2 4 59 53 22 58 36 39 60 19 15 - 41 0 0 59 4 42 23 8 12 55 204 -10 58 38 59 59 30 35 58 13 25 59 56 38 - 40 0 0 58 41 8 23 8 19 55 206 -11 58 15 15 59 7 10 57 49 32 59 33 23 - 39 0 0 58 16 55 23 8 26 55 207 -11 57 50 53 58 43 6 57 25 0 59 9 28 - 38 0 0 57 52 2 23 8 33 55 209 -12 57 25 51 58 18 23 56 59 49 58 44 54 - 37 0 0 57 26 28 23 8 41 55 211 -13 57 0 8 57 52 59 56 33 58 58 19 40 - 36 0 0 57 0 15 23 8 48 55 213 -14 56 33 46 57 26 54 56 7 27 57 53 45 - 35 0 0 56 33 20 23 8 56 55 215 -14 56 6 42 57 0 9 55 40 14 57 27 8 - 34 0 0 56 5 43 23 9 4 55 217 -15 55 38 57 56 32 41 55 12 20 56 59 50 - 33 0 0 55 37 25 23 9 12 55 219 -16 55 10 30 56 4 32 54 43 45 56 31 49 - 32 0 0 55 8 24 23 9 20 55 221 -16 54 41 20 55 35 40 54 14 27 56 3 6 - 31 0 0 54 38 41 23 9 28 55 223 -17 54 11 29 55 6 5 53 44 27 55 33 40 - 30 0 0 54 8 15 23 9 36 55 225 -18 53 40 55 54 35 47 53 13 45 55 3 31 - 29 0 0 53 37 6 23 9 45 55 227 -19 53 9 38 54 4 46 52 42 21 54 32 38 - 28 0 0 53 5 14 23 9 53 55 229 -20 52 37 38 53 33 2 52 10 14 54 1 2 - 27 0 0 52 32 39 23 10 2 55 231 -20 52 4 56 53 0 35 51 37 24 53 28 42 - 26 0 0 51 59 22 23 10 11 55 233 -21 51 31 31 52 27 24 51 3 52 52 55 39 - 25 0 0 51 25 21 23 10 20 55 235 -22 50 57 24 51 53 30 50 29 38 52 21 52 - 24 0 0 50 50 38 23 10 29 54 237 -23 50 22 34 51 18 54 49 54 43 51 47 23 - 23 0 0 50 15 13 23 10 38 54 239 -24 49 47 3 50 43 35 49 19 5 51 12 10 - 22 0 0 49 39 6 23 10 47 54 241 -25 49 10 50 50 7 34 48 42 47 50 36 15 - 21 0 0 49 2 18 23 10 57 54 243 -26 48 33 57 49 30 51 48 5 49 49 59 38 - 20 0 0 48 24 50 23 11 7 53 245 -27 47 56 24 48 53 28 47 28 11 49 22 19 - 19 0 0 47 46 42 23 11 16 53 247 -28 47 18 12 48 15 24 46 49 55 48 44 20 - 18 0 0 47 7 55 23 11 26 52 248 -28 46 39 21 47 36 42 46 11 0 48 5 42 - 17 0 0 46 28 31 23 11 36 52 250 -29 45 59 54 46 57 21 45 31 29 47 26 25 - 16 0 0 45 48 30 23 11 46 52 252 -30 45 19 50 46 17 23 44 51 22 46 46 30 - 15 0 0 45 7 54 23 11 56 51 254 -31 44 39 11 45 36 49 44 10 41 46 5 59 - 14 0 0 44 26 43 23 12 6 51 256 -32 43 57 59 44 55 41 43 29 28 45 24 52 - 13 0 0 43 45 1 23 12 16 50 258 -33 43 16 15 44 14 0 42 47 42 44 43 13 - 12 0 0 43 2 47 23 12 26 49 259 -34 42 34 1 43 31 47 42 5 27 44 1 1 - 11 0 0 42 20 5 23 12 36 49 261 -35 41 51 18 42 49 5 41 22 44 43 18 19 - 10 0 0 41 36 55 23 12 46 48 263 -36 41 8 8 42 5 55 40 39 35 42 35 9 - 9 0 0 40 53 19 23 12 57 47 264 -37 40 24 34 41 22 19 39 56 1 41 51 32 - 8 0 0 40 9 20 23 13 7 47 266 -38 39 40 36 40 38 18 39 12 4 41 7 30 - 7 0 0 39 25 0 23 13 17 46 267 -39 38 56 17 39 53 56 38 27 48 40 23 6 - 6 0 0 38 40 20 23 13 27 45 269 -40 38 11 40 39 9 14 37 43 13 39 38 21 - 5 0 0 37 55 23 23 13 37 44 270 -41 37 26 46 38 24 14 36 58 22 38 53 19 - 4 0 0 37 10 12 23 13 47 43 271 -42 36 41 38 37 38 59 36 13 17 38 8 0 - 3 0 0 36 24 48 23 13 57 43 273 -43 35 56 17 36 53 31 35 28 0 37 22 28 - 2 0 0 35 39 13 23 14 7 42 274 -44 35 10 47 36 7 52 34 42 34 36 36 44 - 1 0 0 34 53 31 23 14 16 41 275 -45 34 25 10 35 22 5 33 57 1 35 50 52 0 0 0 34 7 43 23 14 26 40 276 -46 33 39 27 34 36 11 33 11 24 35 4 53 1 0 0 33 21 52 23 14 35 39 277 -47 32 53 42 33 50 15 32 25 44 34 18 50 2 0 0 32 36 0 23 14 44 38 278 -48 32 7 56 33 4 17 31 40 5 33 32 46 3 0 0 31 50 10 23 14 54 37 279 -49 31 22 13 32 18 20 30 54 28 32 46 43 4 0 0 31 4 24 23 15 2 36 280 -50 30 36 34 31 32 27 30 8 55 32 0 43 5 0 0 30 18 44 23 15 11 35 281 -51 29 51 1 30 46 40 29 23 29 31 14 48 6 0 0 29 33 13 23 15 20 34 282 -52 29 5 37 30 1 1 28 38 13 30 29 2 7 0 0 28 47 53 23 15 28 33 283 -53 28 20 25 29 15 33 27 53 8 29 43 26 8 0 0 28 2 46 23 15 36 32 284 -54 27 35 25 28 30 18 27 8 17 28 58 2 9 0 0 27 17 53 23 15 44 31 285 -54 26 50 41 27 45 17 26 23 41 28 12 53 10 0 0 26 33 18 23 15 52 30 285 -55 26 6 15 27 0 33 25 39 22 27 28 0 11 0 0 25 49 2 23 15 59 29 286 -56 25 22 7 26 16 9 24 55 23 26 43 27 12 0 0 25 5 8 23 16 6 28 287 -57 24 38 21 25 32 5 24 11 46 25 59 14 13 0 0 24 21 36 23 16 13 26 287 -57 23 54 58 24 48 24 23 28 32 25 15 24 14 0 0 23 38 28 23 16 20 25 288 -58 23 12 0 24 5 8 22 45 42 24 31 58 15 0 0 22 55 47 23 16 26 24 289 -59 22 29 28 23 22 17 22 3 19 23 48 58 16 0 0 22 13 34 23 16 32 23 289 -59 21 47 24 22 39 55 21 21 24 23 6 26 17 0 0 21 31 50 23 16 38 22 290 -60 21 5 50 21 58 2 20 39 59 22 24 23 18 0 0 20 50 37 23 16 44 21 290 -60 20 24 46 21 16 39 19 59 4 21 42 52 19 0 0 20 9 57 23 16 49 20 291 -61 19 44 14 20 35 49 19 18 41 21 1 52 20 0 0 19 29 49 23 16 54 19 291 -61 19 4 16 19 55 32 18 38 52 20 21 25 21 0 0 18 50 16 23 16 58 17 292 -61 18 24 52 19 15 50 17 59 38 19 41 33 22 0 0 18 11 19 23 17 3 16 292 -61 17 46 4 18 36 43 17 20 58 19 2 17 23 0 0 17 32 58 23 17 7 15 292 -62 17 7 52 17 58 13 16 42 56 18 23 37 24 0 0 16 55 15 23 17 10 14 293 -62 16 30 18 17 20 20 16 5 30 17 45 36 25 0 0 16 18 10 23 17 14 13 293 -62 15 53 22 16 43 6 15 28 43 17 8 12 26 0 0 15 41 44 23 17 17 12 293 -62 15 17 5 16 6 32 14 52 35 16 31 28 27 0 0 15 5 58 23 17 20 11 294 -62 14 41 28 15 30 37 14 17 7 15 55 24 28 0 0 14 30 53 23 17 22 9 294 -62 14 6 32 14 55 23 13 42 19 15 20 1 29 0 0 13 56 28 23 17 25 8 294 -61 13 32 16 14 20 49 13 8 11 14 45 19 30 0 0 13 22 46 23 17 27 7 294 -61 12 58 41 13 46 58 12 34 45 14 11 19 31 0 0 12 49 45 23 17 28 6 295 -61 12 25 49 13 13 49 12 2 1 13 38 1 32 0 0 12 17 27 23 17 30 5 295 -61 11 53 39 12 41 22 11 29 59 13 5 26 33 0 0 11 45 51 23 17 31 4 295 -60 11 22 11 12 9 39 10 58 39 12 33 34 34 0 0 11 14 59 23 17 32 3 295 -60 10 51 27 11 38 38 10 28 2 12 2 26 35 0 0 10 44 50 23 17 32 2 295 -59 10 21 25 11 8 21 .. .. .. 11 32 1 36 0 0 10 15 24 23 17 33 1 296 -59 9 52 7 10 38 48 .. .. .. 11 2 20 Uncertainty in time = +/- 4 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 1945-01990-1 * constellation : Cancer * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 08 41 19.2326 DE: +25 20 31.903 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .018 ) * V mag [mag]: 11.1 * B mag [mag]: 11.8 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (752) Sulamitis approx. diameter [km]: 63 approx. diameter ["]: .047 distance from Earth [AU]: 1.84900 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 896 number of rejected observations: 74 time covered by the observations: 1917 May 21 - 2008 Jan 13 1 sigma uncertainty ellipse (major, minor, PA): 0.023, 0.015, 99° remarks: * orbital elements for (752) Sulamitis : Mean anomaly = 36.13400174 deg Arg. of pericenter = 24.17231436 deg Long. of node = 85.22368329 deg Inclination = 5.95673764 deg Eccentricity = 0.07495072 Semimajor axis = 2.46264487 AU Perihelion dist = 2.27806785 AU Mag: H = 10.11, G = 0.15 Epoch of elements : MJD 54931.96500000 TDT (2009 Apr 10.965) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Apr 10 752 Sulamitis 23h 9.2m UT 11.1 8 41 19.233 25 20 31.90TYC 1945-01990-1 11.8 14.4 63 6.0 1.849 1.914 -11.26 -56.2842 25.346 -167.01 8.28 23.1536 0.22455 0.51939 5.45355 -2.36675 0.00507 -0.00153 2000 35.6328562009 4 9.00000 24.172314 85.223683 5.9567380.07495072 2.4626449 2.278067910.1 5.00.15 RATE 2.5503600 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.030 0.023 95 1.50 0.024 0 54545.5020090410_1990-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 07:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org