IOTA/IOTA-ES occultation update for (1201) Strenua / TYC 1297-01235-1 event on 2008 Apr 01, 22:57 UT Visible from N Africa Summary ------- On 2008 Apr 01 UT, the 35 km diameter asteroid (1201) Strenua will occult a 10.4 mag star in the constellation Taurus for observers along a path across N Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.4 mag to 16.8 mag (the magnitude of the asteroid) for at most 1.3 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: 43 * date and approx. time of event: 2008 Apr 01, 22:58 - 2008 Apr 01, 23:01 UT * magnitude of target star: 10.4 * magnitude drop [mag]: 6.4 * estimated maximum duration [s]: 1.3 * Moon: 21 % sunlit, 126° distance * Sun: 72° distance * rough path description: N Africa The occultation path -------------------- * approximate projected width [km]: 38 * 1 sigma uncertainty interval [path widths]: +/- 1.51 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .032 +/- .025) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .025", 91° ) * approx speed of asteroid's shadow [km/s]: 26.2297 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1297-01235-1 by 1201 Strenua on 2008 Apr 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 - 69 0 0 40 12 32 22 58 47 59 226 0 40 2 20 40 22 44 39 31 37 40 53 38 - 68 0 0 40 12 47 22 58 50 59 228 -1 40 2 35 40 22 59 39 31 53 40 53 53 - 67 0 0 40 12 45 22 58 53 58 230 -2 40 2 34 40 22 58 39 31 51 40 53 51 - 66 0 0 40 12 27 22 58 56 58 231 -3 40 2 16 40 22 40 39 31 33 40 53 33 - 65 0 0 40 11 53 22 58 59 57 232 -4 40 1 41 40 22 5 39 30 58 40 52 59 - 64 0 0 40 11 1 22 59 2 57 234 -4 40 0 49 40 21 14 39 30 6 40 52 8 - 63 0 0 40 9 53 22 59 5 56 235 -5 39 59 41 40 20 6 39 28 58 40 51 0 - 62 0 0 40 8 28 22 59 8 55 236 -6 39 58 16 40 18 41 39 27 33 40 49 36 - 61 0 0 40 6 47 22 59 11 55 238 -7 39 56 35 40 17 0 39 25 51 40 47 55 - 60 0 0 40 4 49 22 59 14 54 239 -7 39 54 37 40 15 2 39 23 52 40 45 58 - 59 0 0 40 2 35 22 59 17 53 240 -8 39 52 22 40 12 48 39 21 37 40 43 44 - 58 0 0 40 0 4 22 59 19 53 241 -9 39 49 51 40 10 17 39 19 5 40 41 14 - 57 0 0 39 57 16 22 59 22 52 243 -10 39 47 3 40 7 30 39 16 16 40 38 27 - 56 0 0 39 54 11 22 59 25 51 244 -10 39 43 58 40 4 25 39 13 11 40 35 24 - 55 0 0 39 50 51 22 59 28 51 245 -11 39 40 37 40 1 5 39 9 49 40 32 4 - 54 0 0 39 47 13 22 59 31 50 246 -12 39 36 59 39 57 28 39 6 10 40 28 28 - 53 0 0 39 43 19 22 59 33 49 247 -13 39 33 5 39 53 34 39 2 14 40 24 35 - 52 0 0 39 39 8 22 59 36 49 248 -13 39 28 54 39 49 23 38 58 2 40 20 26 - 51 0 0 39 34 41 22 59 39 48 249 -14 39 24 26 39 44 57 38 53 34 40 16 0 - 50 0 0 39 29 57 22 59 41 47 250 -15 39 19 42 39 40 13 38 48 48 40 11 18 - 49 0 0 39 24 57 22 59 44 47 251 -16 39 14 41 39 35 13 38 43 46 40 6 19 - 48 0 0 39 19 40 22 59 47 46 252 -17 39 9 24 39 29 57 38 38 28 40 1 4 - 47 0 0 39 14 7 22 59 49 45 253 -17 39 3 50 39 24 24 38 32 53 39 55 32 - 46 0 0 39 8 17 22 59 52 44 254 -18 38 58 0 39 18 34 38 27 1 39 49 44 - 45 0 0 39 2 10 22 59 54 44 255 -19 38 51 53 39 12 29 38 20 53 39 43 40 - 44 0 0 38 55 48 22 59 57 43 256 -20 38 45 30 39 6 6 38 14 28 39 37 19 - 43 0 0 38 49 8 22 59 59 42 257 -20 38 38 50 38 59 27 38 7 47 39 30 42 - 42 0 0 38 42 13 23 0 2 41 258 -21 38 31 54 38 52 32 38 0 49 39 23 48 - 41 0 0 38 35 1 23 0 4 41 259 -22 38 24 41 38 45 21 37 53 35 39 16 38 - 40 0 0 38 27 32 23 0 6 40 259 -23 38 17 12 38 37 53 37 46 4 39 9 12 - 39 0 0 38 19 47 23 0 9 39 260 -23 38 9 27 38 30 9 37 38 17 39 1 30 - 38 0 0 38 11 46 23 0 11 38 261 -24 38 1 25 38 22 8 37 30 14 38 53 31 - 37 0 0 38 3 29 23 0 13 38 262 -25 37 53 7 38 13 52 37 21 54 38 45 16 - 36 0 0 37 54 56 23 0 16 37 263 -26 37 44 33 38 5 19 37 13 18 38 36 45 - 35 0 0 37 46 6 23 0 18 36 264 -26 37 35 43 37 56 30 37 4 26 38 27 58 - 34 0 0 37 37 0 23 0 20 35 264 -27 37 26 36 37 47 24 36 55 17 38 18 55 - 33 0 0 37 27 38 23 0 22 35 265 -28 37 17 14 37 38 3 36 45 53 38 9 35 - 32 0 0 37 18 0 23 0 24 34 266 -29 37 7 35 37 28 26 36 36 12 38 0 0 - 31 0 0 37 8 6 23 0 26 33 267 -29 36 57 40 37 18 32 36 26 16 37 50 9 - 30 0 0 36 57 56 23 0 28 32 267 -30 36 47 30 37 8 23 36 16 3 37 40 2 - 29 0 0 36 47 30 23 0 30 31 268 -31 36 37 3 36 57 58 36 5 35 37 29 39 - 28 0 0 36 36 49 23 0 32 31 269 -32 36 26 21 36 47 17 35 54 50 37 19 0 - 27 0 0 36 25 52 23 0 34 30 270 -33 36 15 23 36 36 21 35 43 50 37 8 5 - 26 0 0 36 14 39 23 0 36 29 270 -33 36 4 10 36 25 9 35 32 35 36 56 55 - 25 0 0 36 3 10 23 0 38 28 271 -34 35 52 41 36 13 41 35 21 4 36 45 30 - 24 0 0 35 51 27 23 0 40 27 272 -35 35 40 56 36 1 58 35 9 17 36 33 49 - 23 0 0 35 39 27 23 0 41 27 272 -36 35 28 56 35 49 59 34 57 15 36 21 53 - 22 0 0 35 27 13 23 0 43 26 273 -36 35 16 41 35 37 46 34 44 58 36 9 41 - 21 0 0 35 14 44 23 0 45 25 274 -37 35 4 11 35 25 17 34 32 25 35 57 14 - 20 0 0 35 1 59 23 0 46 24 274 -38 34 51 26 35 12 33 34 19 38 35 44 33 - 19 0 0 34 49 0 23 0 48 23 275 -39 34 38 26 34 59 34 34 6 36 35 31 36 - 18 0 0 34 35 45 23 0 50 22 275 -39 34 25 11 34 46 21 33 53 19 35 18 25 - 17 0 0 34 22 17 23 0 51 21 276 -40 34 11 41 34 32 53 33 39 47 35 4 59 - 16 0 0 34 8 33 23 0 52 21 277 -41 33 57 57 34 19 10 33 26 1 34 51 18 - 15 0 0 33 54 36 23 0 54 20 277 -42 33 43 59 34 5 13 33 12 1 34 37 24 - 14 0 0 33 40 24 23 0 55 19 278 -42 33 29 46 33 51 2 32 57 46 34 23 15 - 13 0 0 33 25 58 23 0 56 18 279 -43 33 15 20 33 36 37 32 43 18 34 8 52 - 12 0 0 33 11 18 23 0 58 17 279 -44 33 0 40 33 21 58 32 28 35 33 54 15 - 11 0 0 32 56 25 23 0 59 16 280 -45 32 45 46 33 7 6 32 13 39 33 39 24 - 10 0 0 32 41 19 23 1 0 15 280 -45 32 30 38 32 52 0 31 58 30 33 24 20 - 9 0 0 32 25 59 23 1 1 15 281 -46 32 15 18 32 36 40 31 43 8 33 9 3 - 8 0 0 32 10 26 23 1 2 14 281 -47 31 59 44 32 21 8 31 27 32 32 53 33 - 7 0 0 31 54 40 23 1 3 13 282 -47 31 43 58 32 5 23 31 11 44 32 37 49 - 6 0 0 31 38 42 23 1 4 12 282 -48 31 27 59 31 49 25 30 55 43 32 21 54 - 5 0 0 31 22 31 23 1 5 11 283 -49 31 11 48 31 33 15 30 39 30 32 5 45 - 4 0 0 31 6 8 23 1 5 10 284 -49 30 55 24 31 16 53 30 23 5 31 49 25 - 3 0 0 30 49 33 23 1 6 9 284 -50 30 38 49 31 0 19 30 6 28 31 32 52 - 2 0 0 30 32 47 23 1 7 8 285 -51 30 22 2 30 43 33 29 49 39 31 16 8 - 1 0 0 30 15 49 23 1 7 7 285 -51 30 5 4 30 26 36 29 32 39 30 59 13 0 0 0 29 58 41 23 1 8 6 286 -52 29 47 55 30 9 27 29 15 29 30 42 6 1 0 0 29 41 21 23 1 8 6 286 -53 29 30 35 29 52 9 28 58 7 30 24 49 2 0 0 29 23 51 23 1 9 5 287 -53 29 13 4 29 34 39 28 40 35 30 7 21 3 0 0 29 6 11 23 1 9 4 287 -54 28 55 24 29 16 59 28 22 53 29 49 43 4 0 0 28 48 21 23 1 9 3 288 -55 28 37 33 28 59 10 28 5 2 29 31 55 5 0 0 28 30 22 23 1 9 2 288 -55 28 19 33 28 41 11 .. .. .. 29 13 57 6 0 0 28 12 13 23 1 9 1 289 -56 28 1 24 28 23 3 .. .. .. 28 55 50 7 0 0 27 53 56 23 1 9 0 289 -56 .. .. .. 28 4 46 .. .. .. 28 37 34 Uncertainty in time = +/- 3 secs [Prediction of 2008 Mar 28.0] Data for the target star ------------------------ * name: TYC 1297-01235-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 34 58.2478 DE: +16 43 48.789 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .018 ) * V mag [mag]: 10.4 * B mag [mag]: 12.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1201) Strenua approx. diameter [km]: 35 approx. diameter ["]: .017 distance from Earth [AU]: 2.84400 * orbital information: orbit source: Preston date of fit: 2008 Mar 27 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 858 number of rejected observations: 45 time covered by the observations: 1907 Apr 02 - 2008 Feb 09 1 sigma uncertainty ellipse (major, minor, PA): 0.026, 0.018, 91° remarks: * orbital elements for (1201) Strenua : Mean anomaly = 89.19759146 deg Arg. of pericenter = 167.82015313 deg Long. of node = 203.20889001 deg Inclination = 7.00478401 deg Eccentricity = 0.03934976 Semimajor axis = 2.69896785 AU Perihelion dist = 2.59276411 AU Mag: H = 11.21, G = 0.15 Epoch of elements : MJD 54557.95700000 TDT (2008 Apr 01.957) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Apr 1 1201 Strenua 22h 57.4m UT 10.4 5 34 58.248 16 43 48.79TYC 1297-01235-1 12.0 16.8 35 1.3 2.844 3.161 5.80 -91.2752 16.729 -163.44 4.97 22.9566 -0.04719 0.36804 14.68529 1.87696 0.00546 0.00003 2000 87.4288802008 325.00000167.820153203.208890 7.0047840.03934976 2.6989679 2.592764111.4 5.00.15 RATE 2.2228360 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.025 91 2.51 0.026 0 54553.5020080401_1235-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 28, 06:23 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org