IOTA/IOTA-ES occultation update for (219) Thusnelda / TYC 0016-00821-1 event on 2010 Oct 18, 09:35 UT Visible from Summary ------- On 2010 Oct 18 UT, the 40 km diameter asteroid (219) Thusnelda will occult a 11.4 mag star in the constellation Pisces for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 0.6 mag to 11.0 mag (the magnitude of the asteroid) for at most 5.5 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: 75 * date and approx. time of event: 2010 Oct 18, 09:20 - 2010 Oct 18, 09:49 UT * magnitude of target star: 11.4 * magnitude drop [mag]: 0.6 * estimated maximum duration [s]: 5.5 * Moon: 81 % sunlit, 39° distance * Sun: 166° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 40 * 1 sigma uncertainty interval [path widths]: +/- 0.75 * 1 sigma uncertainty interval [seconds]: +/- 3.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .051 +/- .035) * 1 sigma uncertainty ellipse (major, minor, PA): ( .051", .035", 80° ) * approx speed of asteroid's shadow [km/s]: 7.2202 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0016-00821-1 by 219 Thusnelda on 2010 Oct 18 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 ' " Longitude Longitude Longitude Longitude Latitude Latitude Latitude Latitude 140 0 0 -64 18 1 9 49 57 9 56 0 -64 5 8 -64 30 53 -63 45 51 -64 50 13 141 0 0 -64 1 3 9 49 56 10 55 -1 -63 48 3 -64 14 3 -63 28 35 -64 33 33 142 0 0 -63 43 22 9 49 55 10 55 -1 -63 30 15 -63 56 29 -63 10 35 -64 16 11 143 0 0 -63 24 56 9 49 53 11 54 -2 -63 11 41 -63 38 11 -62 51 50 -63 58 5 144 0 0 -63 5 44 9 49 52 11 53 -2 -62 52 21 -63 19 7 -62 32 17 -63 39 13 145 0 0 -62 45 44 9 49 50 12 52 -3 -62 32 12 -62 59 15 -62 11 56 -63 19 34 146 0 0 -62 24 53 9 49 48 12 51 -3 -62 11 13 -62 38 34 -61 50 44 -62 59 6 147 0 0 -62 3 11 9 49 46 13 50 -4 -61 49 22 -62 17 1 -61 28 40 -62 37 46 148 0 0 -61 40 35 9 49 44 14 49 -5 -61 26 37 -61 54 34 -61 5 41 -62 15 33 149 0 0 -61 17 3 9 49 41 14 48 -5 -61 2 56 -61 31 12 -60 41 45 -61 52 25 150 0 0 -60 52 33 9 49 39 15 48 -6 -60 38 16 -61 6 51 -60 16 51 -61 28 20 151 0 0 -60 27 3 9 49 36 16 47 -7 -60 12 35 -60 41 31 -59 50 55 -61 3 15 152 0 0 -60 0 30 9 49 34 16 46 -7 -59 45 52 -60 15 8 -59 23 56 -60 37 7 153 0 0 -59 32 51 9 49 31 17 45 -8 -59 18 2 -59 47 40 -58 55 51 -60 9 56 154 0 0 -59 4 4 9 49 27 18 44 -9 -58 49 5 -59 19 5 -58 26 37 -59 41 37 155 0 0 -58 34 7 9 49 24 18 43 -9 -58 18 56 -58 49 19 -57 56 12 -59 12 8 156 0 0 -58 2 57 9 49 20 19 42 -10 -57 47 34 -58 18 20 -57 24 32 -58 41 26 157 0 0 -57 30 30 9 49 17 20 42 -11 -57 14 55 -57 46 5 -56 51 35 -58 9 29 158 0 0 -56 56 43 9 49 12 21 41 -12 -56 40 57 -57 12 30 -56 17 19 -57 36 13 159 0 0 -56 21 34 9 49 8 21 40 -12 -56 5 35 -56 37 34 -55 41 39 -57 1 35 160 0 0 -55 44 59 9 49 3 22 39 -13 -55 28 48 -56 1 12 -55 4 32 -56 25 33 161 0 0 -55 6 55 9 48 58 23 38 -14 -54 50 31 -55 23 21 -54 25 56 -55 48 1 162 0 0 -54 27 19 9 48 53 24 37 -15 -54 10 42 -54 43 58 -53 45 47 -55 8 58 163 0 0 -53 46 7 9 48 47 25 37 -16 -53 29 16 -54 2 59 -53 4 2 -54 28 20 164 0 0 -53 3 16 9 48 41 26 36 -17 -52 46 11 -53 20 22 -52 20 36 -53 46 3 165 0 0 -52 18 41 9 48 35 27 35 -18 -52 1 23 -52 36 1 -51 35 28 -53 2 3 166 0 0 -51 32 20 9 48 28 28 34 -19 -51 14 48 -51 49 54 -50 48 32 -52 16 18 167 0 0 -50 44 10 9 48 20 29 33 -20 -50 26 23 -51 1 58 -49 59 46 -51 28 42 168 0 0 -49 54 6 9 48 13 30 33 -21 -49 36 5 -50 12 8 -49 9 7 -50 39 14 169 0 0 -49 2 5 9 48 4 31 32 -22 -48 43 50 -49 20 21 -48 16 30 -49 47 49 170 0 0 -48 8 4 9 47 55 32 31 -23 -47 49 35 -48 26 34 -47 21 54 -48 54 24 171 0 0 -47 11 59 9 47 46 33 30 -24 -46 53 16 -47 30 44 -46 25 14 -47 58 55 172 0 0 -46 13 49 9 47 36 34 30 -25 -45 54 51 -46 32 48 -45 26 29 -47 1 20 173 0 0 -45 13 29 9 47 25 35 29 -26 -44 54 18 -45 32 42 -44 25 34 -46 1 36 174 0 0 -44 10 58 9 47 14 37 28 -27 -43 51 33 -44 30 25 -43 22 29 -44 59 40 175 0 0 -43 6 14 9 47 2 38 27 -29 -42 46 35 -43 25 55 -42 17 11 -43 55 30 176 0 0 -41 59 14 9 46 49 39 27 -30 -41 39 23 -42 19 9 -41 9 39 -42 49 4 177 0 0 -40 49 59 9 46 36 41 26 -31 -40 29 54 -41 10 6 -39 59 51 -41 40 20 178 0 0 -39 38 26 9 46 22 42 25 -33 -39 18 9 -39 58 45 -38 47 48 -40 29 19 179 0 0 -38 24 36 9 46 7 43 24 -34 -38 4 7 -38 45 7 -37 33 28 -39 15 59 180 0 0 -37 8 29 9 45 51 45 24 -36 -36 47 49 -37 29 12 -36 16 53 -38 0 21 -179 0 0 -35 50 7 9 45 34 46 23 -37 -35 29 17 -36 11 1 -34 58 5 -36 42 26 -178 0 0 -34 29 32 9 45 17 48 22 -39 -34 8 31 -34 50 35 -33 37 4 -35 22 16 -177 0 0 -33 6 45 9 44 58 49 21 -40 -32 45 35 -33 27 58 -32 13 55 -33 59 53 -176 0 0 -31 41 51 9 44 39 51 21 -42 -31 20 33 -32 3 13 -30 48 40 -32 35 20 -175 0 0 -30 14 54 9 44 19 53 20 -43 -29 53 28 -30 36 23 -29 21 24 -31 8 42 -174 0 0 -28 45 58 9 43 58 54 19 -45 -28 24 25 -29 7 34 -27 52 11 -29 40 3 -173 0 0 -27 15 10 9 43 37 56 18 -47 -26 53 31 -27 36 52 -26 21 8 -28 9 29 -172 0 0 -25 42 36 9 43 14 58 17 -49 -25 20 52 -26 4 22 -24 48 22 -26 37 7 -171 0 0 -24 8 23 9 42 51 59 17 -50 -23 46 35 -24 30 13 -23 13 59 -25 3 4 -170 0 0 -22 32 39 9 42 27 61 16 -52 -22 10 48 -22 54 32 -21 38 7 -23 27 27 -169 0 0 -20 55 32 9 42 2 63 15 -54 -20 33 39 -21 17 27 -20 0 56 -21 50 25 -168 0 0 -19 17 12 9 41 36 65 13 -56 -18 55 18 -19 39 8 -18 22 33 -20 12 8 -167 0 0 -17 37 48 9 41 10 67 12 -58 -17 15 54 -17 59 44 -16 43 8 -18 32 44 -166 0 0 -15 57 30 9 40 43 68 11 -59 -15 35 37 -16 19 25 -15 2 52 -16 52 24 -165 0 0 -14 16 27 9 40 16 70 9 -61 -13 54 36 -14 38 21 -13 21 54 -15 11 17 -164 0 0 -12 34 51 9 39 48 72 7 -63 -12 13 3 -12 56 43 -11 40 24 -13 29 34 -163 0 0 -10 52 52 9 39 20 74 4 -65 -10 31 7 -11 14 40 - 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99 0 0 52 4 27 9 22 10 23 248 -34 52 16 23 51 52 30 52 34 17 51 34 34 - 98 0 0 52 21 14 9 22 6 23 248 -33 52 33 6 52 9 22 52 50 53 51 51 33 - 97 0 0 52 37 17 9 22 2 22 249 -33 52 49 4 52 25 29 53 6 44 52 7 47 - 96 0 0 52 52 36 9 21 58 21 250 -32 53 4 19 52 40 53 53 21 53 52 23 18 - 95 0 0 53 7 13 9 21 55 21 251 -31 53 18 52 52 55 34 53 36 20 52 38 5 - 94 0 0 53 21 9 9 21 51 20 251 -31 53 32 44 53 9 34 53 50 6 52 52 11 - 93 0 0 53 34 25 9 21 48 19 252 -30 53 45 56 53 22 53 54 3 12 53 5 36 - 92 0 0 53 47 0 9 21 45 19 253 -30 53 58 28 53 35 33 54 15 39 53 18 20 - 91 0 0 53 58 57 9 21 42 18 254 -29 54 10 21 53 47 33 54 27 27 53 30 26 - 90 0 0 54 10 16 9 21 39 18 255 -28 54 21 37 53 58 55 54 38 38 53 41 53 - 89 0 0 54 20 57 9 21 36 17 255 -28 54 32 15 54 9 39 54 49 12 53 52 42 - 88 0 0 54 31 2 9 21 34 16 256 -27 54 42 17 54 19 47 54 59 9 54 2 54 - 87 0 0 54 40 31 9 21 31 16 257 -27 54 51 43 54 29 18 55 8 31 54 12 29 - 86 0 0 54 49 24 9 21 29 15 258 -26 55 0 33 54 38 14 55 17 17 54 21 28 - 85 0 0 54 57 42 9 21 26 15 259 -25 55 8 49 54 46 34 55 25 30 54 29 53 - 84 0 0 55 5 25 9 21 24 14 259 -25 55 16 30 54 54 20 55 33 8 54 37 42 - 83 0 0 55 12 35 9 21 22 13 260 -24 55 23 38 55 1 32 55 40 12 54 44 57 - 82 0 0 55 19 11 9 21 20 13 261 -24 55 30 12 55 8 10 55 46 43 54 51 37 - 81 0 0 55 25 14 9 21 18 12 262 -23 55 36 13 55 14 15 55 52 42 54 57 45 - 80 0 0 55 30 44 9 21 16 12 263 -23 55 41 42 55 19 46 55 58 8 55 3 19 - 79 0 0 55 35 42 9 21 14 11 263 -22 55 46 38 55 24 45 56 3 2 55 8 20 - 78 0 0 55 40 7 9 21 13 11 264 -21 55 51 2 55 29 12 56 7 24 55 12 49 - 77 0 0 55 44 1 9 21 11 10 265 -21 55 54 55 55 33 7 56 11 15 55 16 45 - 76 0 0 55 47 23 9 21 10 9 266 -20 55 58 15 55 36 29 56 14 34 55 20 9 - 75 0 0 55 50 13 9 21 8 9 267 -20 56 1 5 55 39 20 56 17 23 55 23 1 - 74 0 0 55 52 32 9 21 7 8 267 -19 56 3 23 55 41 40 56 19 40 55 25 22 - 73 0 0 55 54 19 9 21 6 8 268 -19 56 5 10 55 43 28 56 21 26 55 27 11 - 72 0 0 55 55 35 9 21 5 7 269 -18 56 6 26 55 44 45 56 22 42 55 28 28 - 71 0 0 55 56 21 9 21 4 7 270 -17 56 7 11 55 45 30 56 23 26 55 29 13 - 70 0 0 55 56 35 9 21 3 6 271 -17 56 7 25 55 45 44 56 23 40 55 29 27 - 69 0 0 55 56 18 9 21 2 5 272 -16 56 7 8 55 45 27 56 23 24 55 29 10 - 68 0 0 55 55 29 9 21 1 5 272 -16 56 6 20 55 44 38 56 22 36 55 28 21 - 67 0 0 55 54 10 9 21 0 4 273 -15 56 5 1 55 43 18 56 21 17 55 27 0 - 66 0 0 55 52 19 9 21 0 4 274 -15 56 3 11 55 41 27 56 19 28 55 25 8 - 65 0 0 55 49 56 9 20 59 3 275 -14 56 0 49 55 39 3 56 17 7 55 22 44 - 64 0 0 55 47 2 9 20 59 3 276 -14 55 57 55 55 36 8 56 14 15 55 19 47 - 63 0 0 55 43 36 9 20 58 2 276 -13 55 54 30 55 32 41 56 10 52 55 16 18 - 62 0 0 55 39 37 9 20 58 2 277 -12 55 50 33 55 28 41 56 6 56 55 12 16 - 61 0 0 55 35 6 9 20 58 1 278 -12 55 46 3 55 24 9 56 2 29 55 7 42 - 60 0 0 55 30 2 9 20 58 0 279 -11 55 41 1 55 19 3 55 57 29 55 2 34 Uncertainty in time = +/- 5 secs Prediction of 2009 Apr 19.0 Data for the target star ------------------------ * name: TYC 0016-00821-1 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 00 38 46.0479 DE: +05 21 12.991 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .022, .030 ) * V mag [mag]: 11.4 * B mag [mag]: 12.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (219) Thusnelda approx. diameter [km]: 40 approx. diameter ["]: .061 distance from Earth [AU]: 0.90600 * orbital information: orbit source: Preston date of fit: 2009 Apr 18 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 913 number of rejected observations: 109 time covered by the observations: 1913 Dec 19 - 2009 Apr 07 1 sigma uncertainty ellipse (major, minor, PA): 0.046, 0.017, 78° remarks: * orbital elements for (219) Thusnelda : Mean anomaly = 22.07452583 deg Arg. of pericenter = 142.31427204 deg Long. of node = 200.92306923 deg Inclination = 10.84667731 deg Eccentricity = 0.22398108 Semimajor axis = 2.35424554 AU Perihelion dist = 1.82693908 AU Mag: H = 9.12, G = 0.15 Epoch of elements : MJD 55487.40000000 TDT (2010 Oct 18.400) ------ occelmnt file for Occult BEGIN ----------------------------------- 2010 Oct 18 219 Thusnelda 9h 35.6m UT 11.4 0 38 46.048 5 21 12.99TYC 0016-00821-1 12.1 11.0 40 5.5 0.906 -1.238 -34.92 -160.9718 5.363 32.42 -9.64 9.5927 0.09901 -0.05270 -1.90779 -3.60113 0.00119 0.00040 2000 20.05542420101011.00000142.314272200.923069 10.8466770.22398108 2.3542455 1.8269391 9.3 5.00.15 RATE 2.7285160 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.051 0.035 80 1.75 0.046 0 54940.0020101018_0821-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2009 Apr 18, 23:23 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org