IOTA/IOTA-ES occultation update for (460) Scania / TYC 1286-00242-1 event on 2009 Feb 10, 14:11 UT Visible from Summary ------- On 2009 Feb 10 UT, the 22 km diameter asteroid (460) Scania will occult a 9.6 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.7 mag to 15.3 mag (the magnitude of the asteroid) for at most 4.8 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: 35 * date and approx. time of event: 2009 Feb 10, 14:05 - 2009 Feb 10, 14:30 UT * magnitude of target star: 9.6 * magnitude drop [mag]: 5.7 * estimated maximum duration [s]: 4.8 * Moon: 99 % sunlit, 77° distance * Sun: 116° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 26 * 1 sigma uncertainty interval [path widths]: +/- 1.92 * 1 sigma uncertainty interval [seconds]: +/- 11.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .036 +/- .025) * 1 sigma uncertainty ellipse (major, minor, PA): ( .036", .025", 89° ) * approx speed of asteroid's shadow [km/s]: 4.5617 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1286-00242-1 by 460 Scania on 2009 Feb 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 52 0 0 38 5 45 14 5 32 54 116 -1 37 56 24 38 15 7 37 20 40 38 51 17 53 0 0 38 45 57 14 5 58 55 118 -2 38 36 36 38 55 19 38 0 54 39 31 28 54 0 0 39 25 46 14 6 24 55 120 -3 39 16 26 39 35 7 38 40 45 40 11 14 55 0 0 40 5 11 14 6 49 56 122 -4 39 55 51 40 14 32 39 20 13 40 50 36 56 0 0 40 44 10 14 7 15 56 125 -5 40 34 51 40 53 30 39 59 16 41 29 31 57 0 0 41 22 41 14 7 40 56 127 -6 41 13 23 41 32 0 40 37 52 42 7 57 58 0 0 42 0 43 14 8 6 56 129 -7 41 51 27 42 10 1 41 16 0 42 45 54 59 0 0 42 38 15 14 8 30 57 131 -8 42 29 0 42 47 32 41 53 37 43 23 20 60 0 0 43 15 15 14 8 55 57 134 -9 43 6 1 43 24 30 42 30 44 44 0 13 61 0 0 43 51 43 14 9 20 57 136 -10 43 42 30 44 0 56 43 7 19 44 36 33 62 0 0 44 27 36 14 9 44 57 138 -10 44 18 25 44 36 48 43 43 20 45 12 18 63 0 0 45 2 55 14 10 8 57 140 -11 44 53 46 45 12 5 44 18 47 45 47 29 64 0 0 45 37 38 14 10 31 57 143 -12 45 28 31 45 46 47 44 53 39 46 22 3 65 0 0 46 11 46 14 10 54 57 145 -13 46 2 40 46 20 52 45 27 56 46 56 1 66 0 0 46 45 16 14 11 17 57 147 -14 46 36 13 46 54 20 46 1 36 47 29 21 67 0 0 47 18 9 14 11 40 57 150 -15 47 9 8 47 27 11 46 34 39 48 2 3 68 0 0 47 50 24 14 12 2 57 152 -15 47 41 25 47 59 24 47 7 4 48 34 7 69 0 0 48 22 1 14 12 24 57 154 -16 48 13 4 48 30 59 47 38 52 49 5 33 70 0 0 48 52 59 14 12 46 57 156 -17 48 44 5 49 1 55 48 10 2 49 36 20 71 0 0 49 23 19 14 13 7 56 158 -18 49 14 27 49 32 12 48 40 34 50 6 29 72 0 0 49 53 1 14 13 28 56 160 -18 49 44 11 50 1 51 49 10 27 50 35 58 73 0 0 50 22 3 14 13 48 56 162 -19 50 13 16 50 30 51 49 39 41 51 4 48 74 0 0 50 50 27 14 14 8 56 164 -20 50 41 43 50 59 13 50 8 17 51 33 0 75 0 0 51 18 13 14 14 28 55 166 -20 51 9 31 51 26 55 50 36 15 52 0 32 76 0 0 51 45 20 14 14 47 55 168 -21 51 36 40 51 54 0 51 3 34 52 27 27 77 0 0 52 11 48 14 15 6 55 170 -22 52 3 12 52 20 26 51 30 16 52 53 43 78 0 0 52 37 39 14 15 25 54 172 -22 52 29 5 52 46 14 51 56 19 53 19 21 79 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59 55 33 59 10 26 60 25 26 178 0 0 59 34 47 14 29 42 10 286 -39 59 27 0 59 42 34 58 57 16 60 12 34 179 0 0 59 21 21 14 29 45 10 287 -39 59 13 33 59 29 10 58 43 41 59 59 18 180 0 0 59 7 31 14 29 48 9 288 -39 58 59 41 59 15 22 58 29 41 59 45 38 -179 0 0 58 53 16 14 29 51 9 289 -38 58 45 24 59 1 9 58 15 16 59 31 33 -178 0 0 58 38 36 14 29 53 8 290 -38 58 30 41 58 46 31 58 0 26 59 17 2 -177 0 0 58 23 30 14 29 56 8 291 -38 58 15 33 58 31 27 57 45 11 59 2 7 -176 0 0 58 7 58 14 29 58 7 292 -38 58 0 0 58 15 57 57 29 29 58 46 45 -175 0 0 57 52 0 14 30 0 6 292 -37 57 44 0 58 0 2 57 13 21 58 30 58 -174 0 0 57 35 37 14 30 2 6 293 -37 57 27 34 57 43 40 56 56 47 58 14 44 -173 0 0 57 18 46 14 30 3 5 294 -37 57 10 41 57 26 52 56 39 47 57 58 4 -172 0 0 57 1 29 14 30 5 5 295 -37 56 53 22 57 9 36 56 22 19 57 40 57 -171 0 0 56 43 44 14 30 6 4 296 -36 56 35 35 56 51 54 56 4 25 57 23 23 -170 0 0 56 25 32 14 30 8 3 297 -36 56 17 21 56 33 44 55 46 3 57 5 22 -169 0 0 56 6 53 14 30 9 3 297 -36 55 58 40 56 15 7 55 27 13 56 46 53 -168 0 0 55 47 46 14 30 9 2 298 -36 55 39 30 55 56 2 .. .. .. 56 27 56 -167 0 0 55 28 11 14 30 10 1 299 -35 55 19 53 55 36 29 .. .. .. 56 8 31 -166 0 0 55 8 8 14 30 10 1 300 -35 54 59 48 55 16 28 .. .. .. 55 48 39 -165 0 0 54 47 37 14 30 11 0 301 -35 .. .. .. 54 55 59 .. .. .. 55 28 18 Uncertainty in time = +/- 12 secs [Prediction of 2008 Nov 6.0] Data for the target star ------------------------ * name: TYC 1286-00242-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 09 09.9487 DE: +17 16 50.751 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .018 ) * V mag [mag]: 9.6 * B mag [mag]: 11.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (460) Scania approx. diameter [km]: 22 approx. diameter ["]: .014 distance from Earth [AU]: 2.10600 * orbital information: orbit source: Preston date of fit: 2008 Nov 05 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 853 number of rejected observations: 80 time covered by the observations: 1900 Oct 25 - 2008 Jul 29 1 sigma uncertainty ellipse (major, minor, PA): 0.026, 0.017, 89° remarks: * orbital elements for (460) Scania : Mean anomaly = 77.76066769 deg Arg. of pericenter = 162.24754664 deg Long. of node = 205.38649418 deg Inclination = 4.63576308 deg Eccentricity = 0.10336445 Semimajor axis = 2.71835887 AU Perihelion dist = 2.43737721 AU Mag: H = 10.66, G = 0.15 Epoch of elements : MJD 54872.59100000 TDT (2009 Feb 10.591) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Feb 10 460 Scania 14h 10.6m UT 9.6 5 9 9.949 17 16 50.75TYC 1286-00242-1 11.3 15.3 22 4.8 2.106 0.677 4.69 83.8500 17.280 -29.09 -14.18 14.1769 -0.23607 0.48520 2.31648 1.12399 0.00521 0.00071 2000 77.1908832009 2 8.00000162.247547205.386494 4.6357630.10336445 2.7183589 2.437377210.6 5.00.15 RATE 2.1990940 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.036 0.025 89 2.92 0.028 0 54776.5020090210_0242-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 06, 05:35 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org