IOTA/IOTA-ES occultation update for (387) Aquitania / TYC 5851-00500-1 event on 2009 Dec 02, 22:22 UT Visible from Summary ------- On 2009 Dec 02 UT, the 101 km diameter asteroid (387) Aquitania will occult a 10.9 mag star in the constellation Cetus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.6 mag to 12.2 mag (the magnitude of the asteroid) for at most 11.7 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: 88 * date and approx. time of event: 2009 Dec 02, 22:13 - 2009 Dec 02, 22:30 UT * magnitude of target star: 10.9 * magnitude drop [mag]: 1.6 * estimated maximum duration [s]: 11.7 * Moon: 99 % sunlit, 74° distance * Sun: 115° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 144 * 1 sigma uncertainty interval [path widths]: +/- 0.56 * 1 sigma uncertainty interval [seconds]: +/- 4.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .036 +/- .025) * 1 sigma uncertainty ellipse (major, minor, PA): ( .037", .025", 88° ) * approx speed of asteroid's shadow [km/s]: 8.6046 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5851-00500-1 by 387 Aquitania on 2009 Dec 2 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 76 31 39 -49 13 12 22 13 26 4 247 -5 71 47 37 -50 45 1 ... .. .. .. .. .. 68 13 50 -51 51 18 ... .. .. .. .. .. 67 14 37 -50 33 47 22 13 39 10 254 -8 64 40 49 -51 19 33 70 18 48 -49 37 9 62 9 21 -52 3 12 75 18 39 -48 1 7 61 32 3 -50 41 33 22 13 53 13 258 -10 59 30 11 -51 15 35 63 45 37 -50 3 10 57 23 46 -51 49 53 66 36 11 -49 12 34 57 1 48 -50 26 24 22 14 6 16 261 -12 55 16 23 -50 54 17 58 53 53 -49 55 58 53 24 35 -51 23 3 61 9 48 -49 17 58 53 14 42 -49 58 45 22 14 19 18 264 -14 51 39 51 -50 22 39 54 54 1 -49 33 5 49 58 1 -50 47 38 56 51 47 -49 1 48 49 58 3 -49 23 4 22 14 32 20 266 -15 48 30 48 -49 44 6 51 28 36 -49 0 41 46 56 25 -50 6 16 53 14 37 -48 33 46 47 4 46 -48 41 47 22 14 46 22 268 -16 45 43 22 -49 0 39 48 28 44 -48 21 51 44 14 51 -49 20 38 50 6 19 -47 58 5 44 30 16 -47 56 27 22 14 59 24 269 -18 43 13 34 -48 13 34 45 49 2 -47 38 26 41 49 52 -48 31 47 47 20 6 -47 17 4 42 11 18 -47 8 3 22 15 12 25 271 -19 40 58 32 -47 23 45 43 25 50 -46 51 35 39 38 53 -47 40 31 44 51 39 -46 32 8 40 5 31 -46 17 19 22 15 25 27 272 -20 38 56 4 -46 31 50 41 16 28 -46 2 8 37 39 55 -46 47 22 42 37 56 -45 44 15 38 11 1 -45 24 46 22 15 38 28 273 -21 37 4 28 -45 38 17 39 18 55 -45 10 39 35 51 21 -45 52 45 40 36 40 -44 54 5 36 26 22 -44 30 47 22 15 52 29 273 -23 35 22 21 -44 43 26 37 31 35 -44 17 36 34 11 55 -44 57 0 38 46 9 -44 2 9 34 50 21 -43 35 40 22 16 5 31 274 -24 33 48 34 -43 47 34 35 53 11 -43 23 17 32 40 32 -44 0 21 37 4 57 -43 8 48 33 21 57 -42 39 39 22 16 18 32 275 -25 32 22 11 -42 50 54 34 22 41 -42 27 58 31 16 18 -43 2 59 35 31 58 -42 14 19 32 0 21 -41 42 56 22 16 31 33 275 -26 31 2 23 -41 53 35 32 59 12 -41 31 51 29 58 28 -42 5 3 34 6 16 -41 18 56 30 44 50 -40 45 37 22 16 45 34 275 -27 29 48 31 -40 55 45 31 41 59 -40 35 5 28 46 22 -41 6 40 32 47 3 -40 22 49 29 34 48 -39 47 50 22 16 58 35 275 -28 28 39 59 -39 57 31 30 30 24 -39 37 48 27 39 26 -40 7 56 31 33 40 -39 26 6 28 29 44 -38 49 41 22 17 11 35 275 -29 27 36 16 -38 58 57 29 23 55 -38 40 5 26 37 12 -39 8 56 30 25 32 -38 28 54 27 29 10 -37 51 14 22 17 24 36 275 -30 26 36 57 -38 0 7 28 22 3 -37 42 1 25 39 15 -38 9 42 29 22 10 -37 31 17 26 32 42 -36 52 32 22 17 38 37 275 -31 25 41 39 -37 1 5 27 24 25 -36 43 40 24 45 11 -37 10 18 28 23 9 -36 33 21 25 40 0 -35 53 37 22 17 51 38 275 -32 24 50 1 -36 1 52 26 30 37 -35 45 5 23 54 42 -36 10 46 27 28 5 -35 35 8 24 50 46 -34 54 33 22 18 4 39 275 -33 24 1 45 -35 2 32 25 40 22 -34 46 18 23 7 31 -35 11 8 26 36 41 -34 36 42 24 4 43 -33 55 21 22 18 17 39 274 -34 23 16 37 -34 3 4 24 53 24 -33 47 21 22 23 22 -34 11 24 25 48 38 -33 38 4 23 21 37 -32 56 2 22 18 31 40 274 -35 22 34 21 -33 3 31 24 9 26 -32 48 16 21 42 2 -33 11 37 25 3 40 -32 39 16 22 41 16 -31 56 36 22 18 44 40 273 -36 21 54 47 -32 3 53 23 28 17 -31 49 4 21 3 19 -32 11 46 24 21 36 -31 40 19 22 3 28 -30 57 6 22 18 57 41 273 -37 21 17 42 -31 4 12 22 49 44 -30 49 45 20 27 2 -31 11 52 23 42 12 -30 41 14 21 28 2 -29 57 31 22 19 10 41 272 -38 20 42 57 -30 4 26 22 13 37 -29 50 21 19 53 1 -30 11 55 23 5 18 -29 42 2 20 54 51 -28 57 51 22 19 23 42 272 -39 20 10 23 -29 4 37 21 39 48 -28 50 51 19 21 8 -29 11 56 22 30 44 -28 42 44 20 23 45 -27 58 7 22 19 37 42 271 -40 19 39 53 -28 4 44 21 8 7 -27 51 16 18 51 16 -28 11 54 21 58 23 -27 43 19 19 54 39 -26 58 19 22 19 50 43 270 -41 19 11 18 -27 4 48 20 38 27 -26 51 36 18 23 17 -27 11 49 21 28 5 -26 43 48 19 27 24 -25 58 26 22 20 3 43 269 -42 18 44 34 -26 4 48 20 10 41 -25 51 50 17 57 6 -26 11 41 20 59 45 -25 44 11 19 1 55 -24 58 28 22 20 16 43 269 -43 18 19 33 -25 4 44 19 44 45 -24 51 59 17 32 36 -25 11 30 20 33 16 -24 44 28 18 38 8 -23 58 25 22 20 30 44 268 -44 17 56 11 -24 4 35 19 20 31 -23 52 2 17 9 42 -24 11 15 20 8 32 -23 44 38 18 15 57 -22 58 16 22 20 43 44 267 -45 17 34 24 -23 4 21 18 57 56 -22 51 59 16 48 21 -23 10 56 19 45 30 -22 44 41 17 55 18 -21 58 2 22 20 56 44 266 -46 17 14 7 -22 4 2 18 36 55 -21 51 49 16 28 29 -22 10 32 19 24 3 -21 44 37 17 36 8 -20 57 40 22 21 9 44 265 -47 16 55 17 -21 3 37 18 17 24 -20 51 32 16 10 0 -21 10 2 19 4 10 -20 44 24 17 18 23 -19 57 11 22 21 23 44 264 -48 16 37 50 -20 3 4 17 59 21 -19 51 7 15 52 54 -20 9 26 18 45 45 -19 44 3 17 2 0 -18 56 34 22 21 36 45 263 -49 16 21 44 -19 2 24 17 42 41 -18 50 33 15 37 6 -19 8 42 18 28 46 -18 43 33 16 46 57 -17 55 48 22 21 49 45 262 -50 16 6 56 -18 1 35 17 27 23 -17 49 49 15 22 35 -18 7 51 18 13 11 -17 42 53 16 33 11 -16 54 52 22 22 2 45 261 -51 15 53 23 -17 0 37 17 13 23 -16 48 56 15 9 17 -17 6 50 17 58 56 -16 42 1 16 20 41 -15 53 46 22 22 16 45 260 -52 15 41 5 -15 59 29 17 0 41 -15 47 51 14 57 12 -16 5 40 17 46 1 -15 40 58 16 9 24 -14 52 27 22 22 29 45 259 -53 15 29 59 -14 58 9 16 49 15 -14 46 33 14 46 18 -15 4 19 17 34 23 -14 39 43 15 59 20 -13 50 56 22 22 42 44 259 -54 15 20 4 -13 56 37 16 39 2 -13 45 3 14 36 33 -14 2 46 17 24 1 -13 38 13 15 50 28 -12 49 11 22 22 55 44 258 -55 15 11 19 -12 54 52 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8 5 30 22 27 7 35 242 -76 16 21 7 7 58 2 17 47 37 8 13 17 15 33 54 7 49 59 18 37 23 8 22 22 17 24 16 9 18 52 22 27 20 34 241 -77 16 40 40 9 11 7 18 8 39 9 26 55 15 52 41 9 2 48 18 59 21 9 36 21 17 47 1 10 33 27 22 27 33 33 241 -78 17 2 36 10 25 24 18 32 18 10 41 50 16 13 46 10 16 46 19 24 4 10 51 40 18 12 33 11 49 25 22 27 46 32 240 -79 17 27 10 11 41 1 18 58 50 11 58 10 16 37 22 11 32 2 19 51 51 12 8 26 18 41 9 13 6 53 22 28 0 31 240 -81 17 54 41 12 58 6 19 28 37 13 16 4 17 3 45 12 48 42 20 23 3 13 26 51 19 13 13 14 26 3 22 28 13 30 239 -82 18 25 29 14 16 48 20 2 3 14 35 44 17 33 14 14 6 56 20 58 10 14 47 7 19 49 14 15 47 7 22 28 26 28 239 -83 19 0 1 15 37 21 20 39 41 15 57 23 18 6 14 15 26 55 21 37 48 16 9 28 20 29 48 17 10 22 22 28 39 27 239 -85 19 38 50 16 59 58 21 22 11 17 21 18 18 43 15 16 48 54 22 22 41 17 34 14 21 15 43 18 36 6 22 28 53 26 239 -86 20 22 38 18 24 57 22 10 25 18 47 51 19 24 55 18 13 8 23 13 50 19 1 49 22 8 1 20 4 45 22 29 6 24 239 -87 21 12 21 19 52 42 23 5 35 20 17 31 20 12 2 19 39 57 24 12 37 20 32 45 23 8 6 21 36 52 22 29 19 23 239 -87 22 9 13 21 23 41 24 9 17 21 50 54 21 5 42 21 9 49 25 20 59 22 7 46 24 17 59 23 13 14 22 29 32 21 239 -86 23 14 58 22 58 36 25 23 55 23 28 55 22 7 24 22 43 18 26 41 52 23 47 57 25 40 42 24 54 57 22 29 46 19 239 -84 24 32 7 24 38 23 26 53 10 25 12 54 23 19 13 24 21 13 28 19 58 25 34 59 27 21 10 26 43 48 22 29 59 17 240 -82 26 4 39 26 24 30 28 43 19 27 5 6 24 44 22 26 4 46 30 24 0 27 31 56 29 28 28 28 43 1 22 30 12 14 241 -79 27 59 26 28 19 24 31 6 58 29 9 53 26 28 6 27 55 52 33 13 38 29 45 33 32 23 22 30 59 45 22 30 25 10 242 -76 30 30 30 30 28 1 34 38 19 31 38 57 28 40 12 29 57 59 38 5 45 32 41 41 37 29 49 34 2 17 22 30 38 5 245 -70 34 18 12 33 4 6 ... .. .. .. .. .. 31 43 40 32 19 5 ... .. .. .. .. .. Uncertainty in time = +/- 7 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 5851-00500-1 * constellation : Cetus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 04 51.4301 DE: -17 48 05.199 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .034, .024 ) * V mag [mag]: 10.9 * B mag [mag]: 11.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (387) Aquitania approx. diameter [km]: 101 approx. diameter ["]: .065 distance from Earth [AU]: 2.15600 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 960 number of rejected observations: 102 time covered by the observations: 1900 Sep 15 - 2008 Mar 12 1 sigma uncertainty ellipse (major, minor, PA): 0.013, 0.009, 78° remarks: * orbital elements for (387) Aquitania : Mean anomaly = 74.74718911 deg Arg. of pericenter = 157.55315623 deg Long. of node = 128.30954418 deg Inclination = 18.13842046 deg Eccentricity = 0.23763329 Semimajor axis = 2.73782969 AU Perihelion dist = 2.08723021 AU Mag: H = 7.51, G = 0.15 Epoch of elements : MJD 55167.93200000 TDT (2009 Dec 02.932) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Dec 2 387 Aquitania 22h 22.0m UT 10.9 1 4 51.430-17 48 5.20TYC 5851-00500-1 11.1 12.2 101 11.7 2.156 0.153 19.70 -31.1852 -17.807 -158.09 -22.08 22.3673 0.70681 -0.07865 0.53048 4.82764 0.00434 0.00310 2000 73.02144220091125.00000157.553156128.309544 18.1384200.23763329 2.7378297 2.0872302 7.4 5.00.15 RATE 2.1756770 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.037 0.025 88 1.56 0.036 0 54545.5020091202_0500-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 17:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org