IOTA/IOTA-ES occultation update for (663) Gerlinde / 2UCAC 35341094 event on 2008 Mar 31, 03:10 UT Visible from USA, Canada Summary ------- On 2008 Mar 31 UT, the 101 km diameter asteroid (663) Gerlinde will occult a 13.3 mag star in the constellation Orion for observers along a path across USA, Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.8 mag to 14.9 mag (the magnitude of the asteroid) for at most 4.2 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: 43 * date and approx. time of event: 2008 Mar 31, 03:11 - 2008 Mar 31, 03:13 UT * magnitude of target star: 13.3 * magnitude drop [mag]: 1.8 * estimated maximum duration [s]: 4.2 * Moon: 38 % sunlit, 145° distance * Sun: 73° distance * rough path description: USA, Canada The occultation path -------------------- * approximate projected width [km]: 121 * 1 sigma uncertainty interval [path widths]: +/- 1.54 * 1 sigma uncertainty interval [seconds]: +/- 6.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .071 +/- .071) * 1 sigma uncertainty ellipse (major, minor, PA): ( .071", .071", 91° ) * approx speed of asteroid's shadow [km/s]: 23.7867 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 35341094 by 663 Gerlinde on 2008 Mar 31 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 -132 0 0 45 25 30 3 11 33 50 214 0 44 52 52 45 58 20 43 13 34 47 40 49 -131 0 0 45 27 59 3 11 36 50 216 -1 44 55 21 46 0 48 43 16 5 47 43 16 -130 0 0 45 30 17 3 11 39 49 217 -2 44 57 40 46 3 6 43 18 25 47 45 32 -129 0 0 45 32 23 3 11 42 49 218 -2 44 59 46 46 5 12 43 20 33 47 47 36 -128 0 0 45 34 18 3 11 45 48 220 -3 45 1 42 46 7 6 43 22 29 47 49 29 -127 0 0 45 36 1 3 11 48 48 221 -4 45 3 25 46 8 49 43 24 14 47 51 11 -126 0 0 45 37 33 3 11 51 47 222 -5 45 4 57 46 10 21 43 25 47 47 52 42 -125 0 0 45 38 53 3 11 54 47 224 -5 45 6 18 46 11 41 43 27 8 47 54 1 -124 0 0 45 40 2 3 11 57 46 225 -6 45 7 27 46 12 49 43 28 18 47 55 9 -123 0 0 45 41 0 3 12 0 46 226 -7 45 8 25 46 13 47 43 29 16 47 56 6 -122 0 0 45 41 46 3 12 2 45 227 -7 45 9 11 46 14 33 43 30 3 47 56 51 -121 0 0 45 42 20 3 12 5 45 229 -8 45 9 46 46 15 7 43 30 38 47 57 25 -120 0 0 45 42 43 3 12 8 44 230 -9 45 10 9 46 15 30 43 31 1 47 57 48 -119 0 0 45 42 55 3 12 11 44 231 -9 45 10 21 46 15 42 43 31 13 47 58 0 -118 0 0 45 42 55 3 12 14 43 232 -10 45 10 21 46 15 42 43 31 13 47 58 0 -117 0 0 45 42 44 3 12 16 43 233 -11 45 10 9 46 15 31 43 31 1 47 57 49 -116 0 0 45 42 21 3 12 19 42 234 -11 45 9 46 46 15 8 43 30 38 47 57 27 -115 0 0 45 41 47 3 12 22 41 235 -12 45 9 12 46 14 34 43 30 3 47 56 54 -114 0 0 45 41 1 3 12 24 41 236 -13 45 8 26 46 13 49 43 29 17 47 56 9 -113 0 0 45 40 4 3 12 27 40 237 -13 45 7 29 46 12 52 43 28 18 47 55 13 -112 0 0 45 38 56 3 12 29 40 239 -14 45 6 20 46 11 44 43 27 9 47 54 6 -111 0 0 45 37 36 3 12 32 39 240 -15 45 5 0 46 10 24 43 25 48 47 52 47 -110 0 0 45 36 5 3 12 34 39 241 -15 45 3 28 46 8 53 43 24 15 47 51 17 -109 0 0 45 34 22 3 12 37 38 242 -16 45 1 45 46 7 11 43 22 31 47 49 36 -108 0 0 45 32 28 3 12 39 37 243 -17 44 59 51 46 5 17 43 20 35 47 47 44 -107 0 0 45 30 23 3 12 42 37 244 -17 44 57 45 46 3 13 43 18 27 47 45 41 -106 0 0 45 28 6 3 12 44 36 245 -18 44 55 28 46 0 56 43 16 8 47 43 26 -105 0 0 45 25 38 3 12 46 35 246 -19 44 52 59 45 58 29 43 13 38 47 41 1 -104 0 0 45 22 58 3 12 49 35 246 -19 44 50 19 45 55 50 43 10 56 47 38 24 -103 0 0 45 20 8 3 12 51 34 247 -20 44 47 27 45 53 0 43 8 3 47 35 36 -102 0 0 45 17 6 3 12 53 34 248 -21 44 44 25 45 49 59 43 4 58 47 32 37 -101 0 0 45 13 52 3 12 55 33 249 -21 44 41 11 45 46 46 43 1 42 47 29 27 -100 0 0 45 10 28 3 12 57 32 250 -22 44 37 46 45 43 22 42 58 15 47 26 6 - 99 0 0 45 6 52 3 13 0 32 251 -23 44 34 9 45 39 48 42 54 36 47 22 33 - 98 0 0 45 3 5 3 13 2 31 252 -23 44 30 22 45 36 2 42 50 46 47 18 50 - 97 0 0 44 59 7 3 13 4 30 253 -24 44 26 23 45 32 4 42 46 45 47 14 56 - 96 0 0 44 54 58 3 13 6 30 254 -24 44 22 13 45 27 56 42 42 32 47 10 50 - 95 0 0 44 50 38 3 13 8 29 255 -25 44 17 52 45 23 37 42 38 8 47 6 34 - 94 0 0 44 46 7 3 13 10 28 255 -26 44 13 19 45 19 7 42 33 33 47 2 7 - 93 0 0 44 41 25 3 13 11 28 256 -26 44 8 36 45 14 25 42 28 47 46 57 29 - 92 0 0 44 36 31 3 13 13 27 257 -27 44 3 42 45 9 33 42 23 50 46 52 40 - 91 0 0 44 31 27 3 13 15 26 258 -28 43 58 37 45 4 30 42 18 42 46 47 40 - 90 0 0 44 26 12 3 13 17 26 259 -28 43 53 21 44 59 16 42 13 22 46 42 29 - 89 0 0 44 20 46 3 13 19 25 260 -29 43 47 54 44 53 51 42 7 52 46 37 8 - 88 0 0 44 15 9 3 13 20 24 260 -29 43 42 16 44 48 15 42 2 11 46 31 36 - 87 0 0 44 9 22 3 13 22 23 261 -30 43 36 27 44 42 29 41 56 19 46 25 53 - 86 0 0 44 3 23 3 13 24 23 262 -31 43 30 28 44 36 32 41 50 16 46 19 59 - 85 0 0 43 57 15 3 13 25 22 263 -31 43 24 18 44 30 24 41 44 3 46 13 55 - 84 0 0 43 50 55 3 13 27 21 263 -32 43 17 57 44 24 6 41 37 39 46 7 41 - 83 0 0 43 44 25 3 13 28 21 264 -32 43 11 25 44 17 37 41 31 4 46 1 16 - 82 0 0 43 37 44 3 13 30 20 265 -33 43 4 44 44 10 57 41 24 18 45 54 40 - 81 0 0 43 30 53 3 13 31 19 266 -33 42 57 51 44 4 8 41 17 23 45 47 54 - 80 0 0 43 23 52 3 13 32 19 266 -34 42 50 49 43 57 7 41 10 16 45 40 58 - 79 0 0 43 16 40 3 13 34 18 267 -35 42 43 36 43 49 57 41 3 0 45 33 52 - 78 0 0 43 9 18 3 13 35 17 268 -35 42 36 13 43 42 36 40 55 33 45 26 35 - 77 0 0 43 1 46 3 13 36 16 269 -36 42 28 39 43 35 5 40 47 56 45 19 8 - 76 0 0 42 54 4 3 13 37 16 269 -36 42 20 56 43 27 24 40 40 9 45 11 31 - 75 0 0 42 46 12 3 13 38 15 270 -37 42 13 2 43 19 34 40 32 11 45 3 45 - 74 0 0 42 38 9 3 13 39 14 271 -37 42 4 59 43 11 33 40 24 4 44 55 48 - 73 0 0 42 29 57 3 13 40 13 272 -38 41 56 46 43 3 22 40 15 47 44 47 41 - 72 0 0 42 21 36 3 13 41 13 272 -38 41 48 23 42 55 2 40 7 21 44 39 25 - 71 0 0 42 13 4 3 13 42 12 273 -39 41 39 50 42 46 32 39 58 44 44 30 59 - 70 0 0 42 4 24 3 13 43 11 274 -39 41 31 8 42 37 52 39 49 59 44 22 24 - 69 0 0 41 55 33 3 13 44 10 274 -40 41 22 17 42 29 3 39 41 3 44 13 39 - 68 0 0 41 46 34 3 13 45 10 275 -40 41 13 16 42 20 5 39 31 59 44 4 44 - 67 0 0 41 37 25 3 13 45 9 276 -41 41 4 6 42 10 57 39 22 45 43 55 41 - 66 0 0 41 28 7 3 13 46 8 276 -41 40 54 46 42 1 40 39 13 22 43 46 28 - 65 0 0 41 18 40 3 13 47 7 277 -42 40 45 18 41 52 14 .. .. .. 43 37 6 - 64 0 0 41 9 4 3 13 47 7 278 -42 40 35 41 41 42 40 .. .. .. 43 27 35 - 63 0 0 40 59 19 3 13 48 6 278 -43 40 25 55 41 32 56 .. .. .. 43 17 56 - 62 0 0 40 49 26 3 13 48 5 279 -43 40 16 1 41 23 4 .. .. .. 43 8 7 - 61 0 0 40 39 24 3 13 48 4 280 -43 40 5 58 41 13 4 .. .. .. 42 58 11 - 60 0 0 40 29 14 3 13 49 3 280 -44 39 55 47 41 2 55 .. .. .. 42 48 5 - 59 0 0 40 18 56 3 13 49 3 281 -44 39 45 27 40 52 37 .. .. .. 42 37 52 - 58 0 0 40 8 29 3 13 49 2 282 -45 39 35 0 40 42 12 .. .. .. 42 27 30 - 57 0 0 39 57 55 3 13 49 1 282 -45 39 24 24 40 31 39 .. .. .. 42 17 0 - 56 0 0 39 47 13 3 13 49 0 283 -45 39 13 41 40 20 58 .. .. .. 42 6 23 Uncertainty in time = +/- 7 secs [Prediction of 2008 Mar 28.0] Data for the target star ------------------------ * name: 2UCAC 35341094 * constellation : Orion * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 32 45.2026 DE: +10 04 15.201 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .070, .070 ) * V mag [mag]: 13.3 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (663) Gerlinde approx. diameter [km]: 101 approx. diameter ["]: .046 distance from Earth [AU]: 3.04000 * orbital information: orbit source: Preston date of fit: 2008 Mar 27 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 785 number of rejected observations: 71 time covered by the observations: 1908 Jun 24 - 2008 Jan 22 1 sigma uncertainty ellipse (major, minor, PA): 0.014, 0.010, 105° remarks: * orbital elements for (663) Gerlinde : Mean anomaly = 297.46825955 deg Arg. of pericenter = 310.53437289 deg Long. of node = 233.02710912 deg Inclination = 17.84921593 deg Eccentricity = 0.15307154 Semimajor axis = 3.06212629 AU Perihelion dist = 2.59340190 AU Mag: H = 9.08, G = 0.15 Epoch of elements : MJD 54556.13200000 TDT (2008 Mar 31.132) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Mar 31 663 Gerlinde 3h 10.1m UT 13.3 5 32 45.203 10 4 15.202UCAC 35341094 0.0 14.9 101 4.2 3.040 2.610 4.74 -153.2027 10.070 133.53 4.27 3.1681 -0.06772 0.54334 13.32525 1.64080 0.00555 -0.00012 2000 296.3403572008 325.00000310.534373233.027109 17.8492160.15307154 3.0621263 2.5934019 9.2 5.00.15 RATE 1.8393720 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.071 0.071 91 2.54 0.070 0 54553.5020080331_341094 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 28, 06:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org