IOTA/IOTA-ES occultation update for (2599) Veseli / TYC 5805-01648-1 event on 2012 Dec 11, 03:04 UT Visible from W Canada, W USA Summary ------- On 2012 Dec 11 UT, the 19 km diameter asteroid (2599) Veseli will occult a 9.0 mag star in the constellation Aquarius for observers along a path across W Canada, W USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.8 mag to 15.8 mag (the magnitude of the asteroid) for at most 0.6 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: 17 * date and approx. time of event: 2012 Dec 11, 03:05 - 2012 Dec 11, 03:07 UT * geocentric midpoint of event [JD]: 2456272.6280375 * magnitude of target star: 9.0 * magnitude drop [mag]: 6.8 * estimated maximum duration [s]: 0.6 * Moon: 7 % sunlit, 100° distance * Sun: 69° distance * rough path description: W Canada, W USA Additional comments ------------------- 20" double star The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 4.07 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .045) * 1 sigma uncertainty ellipse (major, minor, PA): ( .046", .029", 347° ) * approx speed of asteroid's shadow [km/s]: 31.0706 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5805-01648-1 by 2599 Veseli on 2012 Dec 11 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 -149 0 0 24 56 30 3 5 45 53 191 0 24 49 15 25 3 44 23 50 42 26 3 5 -148 0 0 25 37 56 3 5 49 52 193 -1 25 30 41 25 45 11 24 32 1 26 44 38 -147 0 0 26 19 20 3 5 52 51 194 -3 26 12 4 26 26 36 25 13 19 27 26 9 -146 0 0 27 0 41 3 5 56 50 196 -4 26 53 25 27 7 58 25 54 34 28 7 36 -145 0 0 27 41 57 3 5 59 49 197 -5 27 34 40 27 49 14 26 35 45 28 48 58 -144 0 0 28 23 6 3 6 3 48 198 -6 28 15 48 28 30 24 27 16 49 29 30 11 -143 0 0 29 4 7 3 6 6 47 199 -7 28 56 49 29 11 25 27 57 46 30 11 16 -142 0 0 29 44 57 3 6 9 46 200 -8 29 37 39 29 52 16 28 38 34 30 52 10 -141 0 0 30 25 37 3 6 12 45 201 -9 30 18 18 30 32 56 29 19 11 31 32 52 -140 0 0 31 6 3 3 6 16 44 202 -10 30 58 44 31 13 22 29 59 36 32 13 20 -139 0 0 31 46 15 3 6 19 43 204 -11 31 38 56 31 53 34 30 39 47 32 53 32 -138 0 0 32 26 10 3 6 22 42 205 -12 32 18 52 32 33 30 31 19 42 33 33 28 -137 0 0 33 5 49 3 6 24 41 206 -13 32 58 30 33 13 8 31 59 21 34 13 5 -136 0 0 33 45 8 3 6 27 41 207 -14 33 37 50 33 52 27 32 38 42 34 52 23 -135 0 0 34 24 7 3 6 30 40 207 -15 34 16 49 34 31 26 33 17 43 35 31 20 -134 0 0 35 2 45 3 6 33 39 208 -16 34 55 27 35 10 3 33 56 24 36 9 55 -133 0 0 35 41 0 3 6 35 38 209 -17 35 33 43 35 48 18 34 34 43 36 48 6 -132 0 0 36 18 52 3 6 38 37 210 -18 36 11 35 36 26 9 35 12 39 37 25 53 -131 0 0 36 56 18 3 6 40 36 211 -19 36 49 2 37 3 35 35 50 10 38 3 15 -130 0 0 37 33 19 3 6 43 35 212 -20 37 26 3 37 40 36 36 27 17 38 40 10 -129 0 0 38 9 53 3 6 45 34 213 -21 38 2 38 38 17 9 37 3 57 39 16 37 -128 0 0 38 45 59 3 6 47 33 214 -22 38 38 45 38 53 14 37 40 10 39 52 36 -127 0 0 39 21 37 3 6 49 32 214 -23 39 14 23 39 28 51 38 15 56 40 28 6 -126 0 0 39 56 45 3 6 51 31 215 -24 39 49 33 40 3 58 38 51 12 41 3 6 -125 0 0 40 31 23 3 6 53 30 216 -25 40 24 12 40 38 35 39 25 59 41 37 35 -124 0 0 41 5 31 3 6 55 29 217 -25 40 58 20 41 12 42 40 0 16 42 11 32 -123 0 0 41 39 7 3 6 57 28 218 -26 41 31 58 41 46 17 40 34 2 42 44 58 -122 0 0 42 12 12 3 6 59 27 219 -27 42 5 3 42 19 20 41 7 17 43 17 52 -121 0 0 42 44 44 3 7 0 27 219 -28 42 37 37 42 51 51 41 40 0 43 50 13 -120 0 0 43 16 43 3 7 2 26 220 -29 43 9 37 43 23 50 42 12 11 44 22 1 -119 0 0 43 48 10 3 7 3 25 221 -29 43 41 5 43 55 15 42 43 49 44 53 15 -118 0 0 44 19 3 3 7 5 24 222 -30 44 12 0 44 26 7 43 14 55 45 23 56 -117 0 0 44 49 22 3 7 6 23 223 -31 44 42 21 44 56 25 43 45 27 45 54 2 -116 0 0 45 19 8 3 7 8 22 223 -32 45 12 8 45 26 9 44 15 26 46 23 35 -115 0 0 45 48 20 3 7 9 21 224 -32 45 41 21 45 55 20 44 44 51 46 52 33 -114 0 0 46 16 58 3 7 10 21 225 -33 46 10 1 46 23 56 45 13 42 47 20 57 -113 0 0 46 45 2 3 7 11 20 226 -34 46 38 7 46 51 59 45 42 0 47 48 47 -112 0 0 47 12 32 3 7 12 19 226 -34 47 5 38 47 19 27 46 9 44 48 16 2 -111 0 0 47 39 28 3 7 13 18 227 -35 47 32 36 47 46 22 46 36 55 48 42 44 -110 0 0 48 5 50 3 7 14 17 228 -36 47 58 59 48 12 42 47 3 31 49 8 51 -109 0 0 48 31 39 3 7 15 17 229 -36 48 24 49 48 38 29 47 29 34 49 34 24 -108 0 0 48 56 53 3 7 16 16 230 -37 48 50 5 49 3 42 47 55 3 49 59 23 -107 0 0 49 21 34 3 7 17 15 230 -38 49 14 48 49 28 21 48 19 59 50 23 49 -106 0 0 49 45 42 3 7 18 14 231 -38 49 38 57 49 52 27 48 44 22 50 47 41 -105 0 0 50 9 17 3 7 18 13 232 -39 50 2 34 50 16 0 49 8 11 51 11 1 -104 0 0 50 32 18 3 7 19 13 233 -39 50 25 37 50 39 0 49 31 28 51 33 47 -103 0 0 50 54 47 3 7 20 12 234 -40 50 48 8 51 1 27 49 54 12 51 56 0 -102 0 0 51 16 44 3 7 20 11 234 -40 51 10 6 51 23 22 50 16 24 52 17 42 -101 0 0 51 38 9 3 7 21 11 235 -41 51 31 32 51 44 45 50 38 3 52 38 51 -100 0 0 51 59 2 3 7 21 10 236 -41 51 52 27 52 5 37 50 59 11 52 59 28 - 99 0 0 52 19 23 3 7 22 9 237 -42 52 12 50 52 25 56 51 19 48 53 19 34 - 98 0 0 52 39 13 3 7 22 8 238 -42 52 32 42 52 45 45 51 39 53 53 39 9 - 97 0 0 52 58 33 3 7 23 8 238 -43 52 52 3 53 5 3 51 59 27 53 58 14 - 96 0 0 53 17 22 3 7 23 7 239 -43 53 10 54 53 23 51 52 18 31 54 16 48 - 95 0 0 53 35 41 3 7 23 6 240 -44 53 29 15 53 42 8 52 37 5 54 34 52 - 94 0 0 53 53 31 3 7 24 6 241 -44 53 47 6 53 59 56 52 55 9 54 52 27 - 93 0 0 54 10 51 3 7 24 5 242 -44 54 4 28 54 17 15 53 12 43 55 9 33 - 92 0 0 54 27 42 3 7 24 4 242 -45 54 21 21 54 34 4 53 29 48 55 26 10 - 91 0 0 54 44 5 3 7 24 4 243 -45 54 37 45 54 50 25 53 46 24 55 42 18 - 90 0 0 54 59 59 3 7 24 3 244 -46 54 53 41 55 6 18 .. .. .. 55 57 58 - 89 0 0 55 15 26 3 7 25 3 245 -46 55 9 9 55 21 43 .. .. .. 56 13 11 - 88 0 0 55 30 25 3 7 25 2 246 -46 55 24 9 55 36 41 .. .. .. 56 27 57 - 87 0 0 55 44 57 3 7 25 1 246 -47 55 38 42 55 51 11 .. .. .. 56 42 15 - 86 0 0 55 59 2 3 7 25 1 247 -47 55 52 49 56 5 15 .. .. .. 56 56 7 - 85 0 0 56 12 41 3 7 25 0 248 -47 56 6 29 56 18 52 .. .. .. .. .. .. Uncertainty in time = +/- 2 secs Prediction of 2012 Dec 3.0 Data for the target star ------------------------ * name: TYC 5805-01648-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 22 01 42.2844 DE: -11 59 40.637 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .033, .050 ) * V mag [mag]: 9.0 * B mag [mag]: 9.8 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2599) Veseli approx. diameter [km]: 19 approx. diameter ["]: .011 distance from Earth [AU]: 2.27900 * orbital information: orbit source: Preston date of fit: 2012 Nov 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 982 number of rejected observations: 15 time covered by the observations: 1934 Apr 03 - 2012 Nov 01 1 sigma uncertainty ellipse (major, minor, PA): 0.026, 0.018, -135° remarks: * orbital elements for (2599) Veseli : Mean anomaly = 13.50081858 deg Arg. of pericenter = 341.35244480 deg Long. of node = 353.49808744 deg Inclination = 15.34502203 deg Eccentricity = 0.16418843 Semimajor axis = 2.53420598 AU Perihelion dist = 2.11811868 AU Mag: H = 11.40, G = 0.15 Epoch of elements : MJD 56272.12800000 TDT (2012 Dec 11.128) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 11 2599 Veseli 3h 4.4m UT 9.0 22 1 42.284-11 59 40.64TYC 5805-01648-1 9.8 15.8 19 0.6 2.279 3.955 34.80 -155.9061 -12.004 132.23 -23.02 3.0729 -0.23336 0.38923 15.04017 9.01911 0.00494 0.00183 2000 12.980927201212 9.00000341.352445353.498087 15.3450220.16418843 2.5342060 2.118118711.2 5.00.15 RATE 2.4431000 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.046 0.029 347 5.07 0.047 0 0 4 3 056264.0020121211_1648-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 16, 10:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org