IOTA/IOTA-ES occultation update for (5036) Tuttle / TYC 1308-00324-1 event on 2008 Nov 06, 08:29 UT Visible from S USA Summary ------- On 2008 Nov 06 UT, the 17 km diameter asteroid (5036) Tuttle will occult a 9.3 mag star in the constellation Taurus for observers along a path across S USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 7.0 mag to 16.3 mag (the magnitude of the asteroid) for at most 2.5 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: 13 * date and approx. time of event: 2008 Nov 06, 08:17 - 2008 Nov 06, 08:44 UT * midpoint of event [JD]: 2454776.85365 * magnitude of target star: 9.3 * magnitude drop [mag]: 7.0 * estimated maximum duration [s]: 2.5 * Moon: 52 % sunlit, 126° distance * Sun: 142° distance * rough path description: S USA The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 5.17 * 1 sigma uncertainty interval [seconds]: +/- 16.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .077 +/- .057) * 1 sigma uncertainty ellipse (major, minor, PA): ( .077", .057", 84° ) * approx speed of asteroid's shadow [km/s]: 6.8771 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1308-00324-1 by 5036 Tuttle on 2008 Nov 6 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 171 0 0 11 30 50 8 44 13 1 69 -38 11 35 55 11 25 44 12 28 39 .. .. .. 172 0 0 11 53 59 8 44 13 2 69 -39 11 59 5 11 48 54 12 51 49 .. .. .. 173 0 0 12 17 10 8 44 12 3 69 -40 12 22 15 12 12 4 13 15 1 .. .. .. 174 0 0 12 40 21 8 44 11 4 70 -41 12 45 26 12 35 15 13 38 12 11 42 44 175 0 0 13 3 32 8 44 9 5 70 -42 13 8 37 12 58 26 14 1 24 12 5 54 176 0 0 13 26 42 8 44 8 6 70 -43 13 31 48 13 21 36 14 24 35 12 29 4 177 0 0 13 49 51 8 44 6 7 70 -44 13 54 57 13 44 46 14 47 44 12 52 13 178 0 0 14 12 59 8 44 3 8 70 -45 14 18 4 14 7 53 15 10 52 13 15 20 179 0 0 14 36 4 8 44 1 9 71 -46 14 41 10 14 30 59 15 33 57 13 38 26 180 0 0 14 59 7 8 43 58 10 71 -47 15 4 12 14 54 1 15 57 0 14 1 28 -179 0 0 15 22 6 8 43 54 11 71 -48 15 27 12 15 17 1 16 19 59 14 24 28 -178 0 0 15 45 2 8 43 51 12 71 -49 15 50 7 15 39 56 16 42 54 14 47 24 -177 0 0 16 7 53 8 43 47 13 72 -50 16 12 59 16 2 48 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41 35 37 10 36 36 1 34 48 3 - 91 0 0 35 44 7 8 28 54 75 183 -49 35 48 52 35 39 21 36 38 11 34 50 15 - 90 0 0 35 46 1 8 28 42 75 187 -48 35 50 46 35 41 15 36 40 4 34 52 10 - 89 0 0 35 47 38 8 28 29 75 190 -48 35 52 23 35 42 52 36 41 41 34 53 48 - 88 0 0 35 48 58 8 28 17 75 193 -47 35 53 43 35 44 12 36 43 0 34 55 8 - 87 0 0 35 50 1 8 28 4 74 197 -46 35 54 46 35 45 15 36 44 2 34 56 12 - 86 0 0 35 50 46 8 27 52 74 200 -45 35 55 32 35 46 1 36 44 48 34 56 58 - 85 0 0 35 51 15 8 27 39 74 203 -45 35 56 0 35 46 30 36 45 16 34 57 26 - 84 0 0 35 51 27 8 27 27 74 206 -44 35 56 12 35 46 41 36 45 28 34 57 38 - 83 0 0 35 51 21 8 27 15 73 209 -43 35 56 6 35 46 36 36 45 22 34 57 33 - 82 0 0 35 50 58 8 27 2 73 212 -42 35 55 44 35 46 13 36 45 0 34 57 10 - 81 0 0 35 50 19 8 26 50 72 214 -42 35 55 4 35 45 33 36 44 20 34 56 30 - 80 0 0 35 49 22 8 26 38 72 217 -41 35 54 7 35 44 37 36 43 24 34 55 33 - 79 0 0 35 48 8 8 26 25 72 219 -40 35 52 53 35 43 23 36 42 10 34 54 18 - 78 0 0 35 46 37 8 26 13 71 222 -39 35 51 22 35 41 51 36 40 40 34 52 47 - 77 0 0 35 44 48 8 26 1 71 224 -39 35 49 34 35 40 3 36 38 52 34 50 58 - 76 0 0 35 42 43 8 25 49 70 226 -38 35 47 29 35 37 58 36 36 47 34 48 52 - 75 0 0 35 40 21 8 25 37 70 228 -37 35 45 6 35 35 35 36 34 26 34 46 28 - 74 0 0 35 37 41 8 25 25 69 230 -36 35 42 27 35 32 55 36 31 47 34 43 48 - 73 0 0 35 34 44 8 25 12 68 232 -36 35 39 30 35 29 58 36 28 51 34 40 50 - 72 0 0 35 31 30 8 25 0 68 234 -35 35 36 16 35 26 44 36 25 38 34 37 35 - 71 0 0 35 27 59 8 24 48 67 236 -34 35 32 45 35 23 13 36 22 8 34 34 2 - 70 0 0 35 24 10 8 24 36 67 237 -33 35 28 56 35 19 24 36 18 21 34 30 12 - 69 0 0 35 20 4 8 24 24 66 239 -33 35 24 51 35 15 18 36 14 17 34 26 5 - 68 0 0 35 15 42 8 24 13 65 241 -32 35 20 28 35 10 55 36 9 55 34 21 41 - 67 0 0 35 11 1 8 24 1 65 242 -31 35 15 48 35 6 15 36 5 17 34 16 59 - 66 0 0 35 6 4 8 23 49 64 243 -30 35 10 51 35 1 17 36 0 21 34 12 0 - 65 0 0 35 0 49 8 23 37 63 245 -29 35 5 36 34 56 3 35 55 8 34 6 43 - 64 0 0 34 55 17 8 23 25 63 246 -29 35 0 4 34 50 30 35 49 38 34 1 9 - 63 0 0 34 49 28 8 23 14 62 248 -28 34 54 15 34 44 41 35 43 51 33 55 18 - 62 0 0 34 43 21 8 23 2 61 249 -27 34 48 9 34 38 34 35 37 47 33 49 9 - 61 0 0 34 36 58 8 22 50 61 250 -26 34 41 45 34 32 10 35 31 25 33 42 43 - 60 0 0 34 30 16 8 22 39 60 251 -26 34 35 4 34 25 29 35 24 46 33 36 0 - 59 0 0 34 23 18 8 22 27 59 252 -25 34 28 6 34 18 30 35 17 50 33 28 59 - 58 0 0 34 16 2 8 22 16 59 253 -24 34 20 50 34 11 14 35 10 36 33 21 41 - 57 0 0 34 8 29 8 22 5 58 255 -23 34 13 17 34 3 40 35 3 6 33 14 5 - 56 0 0 34 0 38 8 21 53 57 256 -22 34 5 27 33 55 49 34 55 18 33 6 12 - 55 0 0 33 52 30 8 21 42 56 257 -22 33 57 19 33 47 41 34 47 13 32 58 1 - 54 0 0 33 44 5 8 21 31 56 258 -21 33 48 54 33 39 16 34 38 50 32 49 33 - 53 0 0 33 35 22 8 21 20 55 259 -20 33 40 11 33 30 33 34 30 10 32 40 47 - 52 0 0 33 26 22 8 21 9 54 260 -19 33 31 12 33 21 32 34 21 13 32 31 44 - 51 0 0 33 17 4 8 20 58 53 260 -18 33 21 54 33 12 15 34 11 59 32 22 24 - 50 0 0 33 7 29 8 20 47 53 261 -18 33 12 20 33 2 39 34 2 27 32 12 46 - 49 0 0 32 57 37 8 20 36 52 262 -17 33 2 28 32 52 47 33 52 38 32 2 50 - 48 0 0 32 47 28 8 20 25 51 263 -16 32 52 18 32 42 37 33 42 31 31 52 38 - 47 0 0 32 37 1 8 20 14 50 264 -15 32 41 52 32 32 10 33 32 8 31 42 7 - 46 0 0 32 26 16 8 20 4 50 265 -14 32 31 8 32 21 25 33 21 27 31 31 20 - 45 0 0 32 15 15 8 19 53 49 266 -13 32 20 7 32 10 23 33 10 29 31 20 15 - 44 0 0 32 3 56 8 19 43 48 266 -13 32 8 48 31 59 4 32 59 13 31 8 53 - 43 0 0 31 52 20 8 19 33 47 267 -12 31 57 12 31 47 28 32 47 40 30 57 13 - 42 0 0 31 40 26 8 19 22 46 268 -11 31 45 19 31 35 34 32 35 50 30 45 16 - 41 0 0 31 28 16 8 19 12 46 269 -10 31 33 9 31 23 23 32 23 43 30 33 2 - 40 0 0 31 15 48 8 19 2 45 269 -9 31 20 41 31 10 55 32 11 19 30 20 30 - 39 0 0 31 3 3 8 18 52 44 270 -8 31 7 56 30 58 9 31 58 38 30 7 42 - 38 0 0 30 50 1 8 18 42 43 271 -8 30 54 55 30 45 7 31 45 39 29 54 36 - 37 0 0 30 36 41 8 18 33 42 271 -7 30 41 36 30 31 47 31 32 24 29 41 13 - 36 0 0 30 23 5 8 18 23 41 272 -6 30 28 0 30 18 11 31 18 52 29 27 33 - 35 0 0 30 9 12 8 18 14 41 273 -5 30 14 7 30 4 17 31 5 2 29 13 36 - 34 0 0 29 55 2 8 18 4 40 273 -4 29 59 57 29 50 7 30 50 56 28 59 22 - 33 0 0 29 40 35 8 17 55 39 274 -3 29 45 31 29 35 40 30 36 33 28 44 52 - 32 0 0 29 25 52 8 17 46 38 275 -2 29 30 48 29 20 56 30 21 53 28 30 4 - 31 0 0 29 10 51 8 17 37 37 275 -1 29 15 48 29 5 55 30 6 57 28 15 0 - 30 0 0 28 55 35 8 17 28 36 276 -1 29 0 31 28 50 38 29 51 44 27 59 40 Uncertainty in time = +/- 18 secs [Prediction of 2008 Oct 1.0] Data for the target star ------------------------ * name: TYC 1308-00324-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 24 43.1499 DE: +20 52 49.431 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .017, .020 ) * V mag [mag]: 9.3 * B mag [mag]: 9.5 * Apparent position with proper motion RA(deg): 81.3197746931 DE(deg): 20.8902573014 * Equation of equinoxes (radians) : 0.000048462064088 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5036) Tuttle approx. diameter [km]: 17 approx. diameter ["]: .011 distance from Earth [AU]: 2.22100 * orbital information: orbit source: Preston date of fit: 2008 Sep 30 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 800 number of rejected observations: 11 time covered by the observations: 1965 Feb 25 - 2007 Nov 12 1 sigma uncertainty ellipse (major, minor, PA): 0.075, 0.053, 84° remarks: * orbital elements for (5036) Tuttle : Mean anomaly = 288.25466816 deg Arg. of pericenter = 58.04884510 deg Long. of node = 105.11324368 deg Inclination = 2.93045083 deg Eccentricity = 0.18388670 Semimajor axis = 3.14394841 AU Perihelion dist = 2.56581810 AU Mag: H = 11.81, G = 0.15 Epoch of elements : MJD 54776.35300000 TDT (2008 Nov 06.353) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Nov 6 5036 Tuttle 8h 29.3m UT 9.3 5 24 43.150 20 52 49.43TYC 1308-00324-1 9.5 16.3 17 2.5 2.221 -1.097 -0.73 -92.0663 20.881 48.60 -16.13 8.4876 -0.01114 0.25177 -3.87721 -0.18547 -0.00359 -0.00003 2000 287.13143520081031.00000 58.048845105.113244 2.9304510.18388670 3.1439484 2.565818111.4 5.00.15 RATE 1.7680360 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.077 0.057 84 6.17 0.057 0 54740.5020081106_0324-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 01, 23:51 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org