IOTA/IOTA-ES occultation update for (467) Laura / TYC 5543-00211-1 event on 2008 Feb 02, 07:04 UT Visible from Africa Summary ------- On 2008 Feb 02 UT, the 42 km diameter asteroid (467) Laura will occult a 11.1 mag star in the constellation Virgo for observers along a path across Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.9 mag to 16.0 mag (the magnitude of the asteroid) for at most 7.7 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: 43 * date and approx. time of event: 2008 Feb 02, 06:49 - 2008 Feb 02, 07:22 UT * magnitude of target star: 11.1 * magnitude drop [mag]: 4.9 * estimated maximum duration [s]: 7.7 * Moon: 22 % sunlit, 55° distance * Sun: 111° distance * rough path description: Africa The occultation path -------------------- * approximate projected width [km]: 50 * 1 sigma uncertainty interval [path widths]: +/- 1.53 * 1 sigma uncertainty interval [seconds]: +/- 11.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .039 +/- .028) * 1 sigma uncertainty ellipse (major, minor, PA): ( .040", .026", 106° ) * approx speed of asteroid's shadow [km/s]: 5.4898 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5543-00211-1 by 467 Laura on 2008 Feb 02 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 - 20 57 40 76 0 0 6 49 26 1 195 -19 - 21 54 6 - 20 0 50 ... .. .. - 17 4 17 - 21 56 57 75 0 0 6 49 27 2 194 -20 - 22 49 19 - 21 4 16 ... .. .. - 18 20 52 - 22 46 19 74 0 0 6 49 27 3 193 -20 - 23 35 12 - 21 57 10 ... .. .. - 19 24 57 - 23 27 35 73 0 0 6 49 29 4 193 -20 - 24 13 27 - 22 41 30 - 26 32 32 - 20 18 56 - 24 2 12 72 0 0 6 49 30 5 192 -21 - 24 45 26 - 23 18 47 - 26 56 35 - 21 4 38 - 24 31 16 71 0 0 6 49 33 6 192 -21 - 25 12 9 - 23 50 13 - 27 16 18 - 21 43 27 - 24 55 38 70 0 0 6 49 35 7 191 -21 - 25 34 27 - 24 16 41 - 27 32 21 - 22 16 28 - 25 16 1 69 0 0 6 49 38 8 191 -22 - 25 52 58 - 24 38 56 - 27 45 16 - 22 44 35 - 25 32 58 68 0 0 6 49 41 9 191 -22 - 26 8 14 - 24 57 34 - 27 55 30 - 23 8 28 - 25 46 56 67 0 0 6 49 45 10 191 -22 - 26 20 42 - 25 13 4 - 28 3 23 - 23 28 44 - 25 58 20 66 0 0 6 49 49 11 190 -22 - 26 30 43 - 25 25 51 - 28 9 14 - 23 45 49 - 26 7 27 65 0 0 6 49 54 12 190 -22 - 26 38 35 - 25 36 14 - 28 13 18 - 24 0 7 - 26 14 34 64 0 0 6 49 59 13 190 -23 - 26 44 33 - 25 44 30 - 28 15 47 - 24 11 59 - 26 19 54 63 0 0 6 50 4 14 190 -23 - 26 48 49 - 25 50 55 - 28 16 52 - 24 21 41 - 26 23 39 62 0 0 6 50 10 15 190 -23 - 26 51 36 - 25 55 38 - 28 16 41 - 24 29 27 - 26 25 58 61 0 0 6 50 17 16 190 -23 - 26 53 1 - 25 58 52 - 28 15 23 - 24 35 29 - 26 27 1 60 0 0 6 50 23 17 190 -23 - 26 53 13 - 26 0 45 - 28 13 3 - 24 39 57 - 26 26 54 59 0 0 6 50 30 18 190 -23 - 26 52 20 - 26 1 24 - 28 9 48 - 24 43 1 - 26 25 43 58 0 0 6 50 38 19 191 -23 - 26 50 26 - 26 0 57 - 28 5 43 - 24 44 47 - 26 23 34 57 0 0 6 50 45 20 191 -23 - 26 47 37 - 25 59 29 - 28 0 52 - 24 45 24 - 26 20 32 56 0 0 6 50 54 20 191 -23 - 26 43 57 - 25 57 5 - 27 55 18 - 24 44 57 - 26 16 42 55 0 0 6 51 2 21 191 -23 - 26 39 31 - 25 53 49 - 27 49 5 - 24 43 31 - 26 12 6 54 0 0 6 51 11 22 191 -23 - 26 34 23 - 25 49 47 - 27 42 16 - 24 41 10 - 26 6 48 53 0 0 6 51 20 23 191 -23 - 26 28 34 - 25 45 0 - 27 34 53 - 24 37 59 - 26 0 51 52 0 0 6 51 30 24 192 -23 - 26 22 8 - 25 39 32 - 27 26 59 - 24 34 0 - 25 54 17 51 0 0 6 51 40 25 192 -23 - 26 15 7 - 25 33 25 - 27 18 35 - 24 29 18 - 25 47 9 50 0 0 6 51 51 26 192 -23 - 26 7 33 - 25 26 43 - 27 9 43 - 24 23 55 - 25 39 29 49 0 0 6 52 2 27 192 -23 - 25 59 28 - 25 19 27 - 27 0 25 - 24 17 54 - 25 31 17 48 0 0 6 52 13 28 193 -23 - 25 50 54 - 25 11 38 - 26 50 42 - 24 11 15 - 25 22 37 47 0 0 6 52 24 29 193 -23 - 25 41 52 - 25 3 19 - 26 40 34 - 24 4 2 - 25 13 28 46 0 0 6 52 36 30 193 -23 - 25 32 23 - 24 54 31 - 26 30 4 - 23 56 17 - 25 3 53 45 0 0 6 52 48 31 194 -23 - 25 22 29 - 24 45 15 - 26 19 11 - 23 47 59 - 24 53 52 44 0 0 6 53 1 32 194 -22 - 25 12 10 - 24 35 32 - 26 7 57 - 23 39 12 - 24 43 26 43 0 0 6 53 14 33 195 -22 - 25 1 27 - 24 25 22 - 25 56 22 - 23 29 55 - 24 32 35 42 0 0 6 53 27 34 195 -22 - 24 50 20 - 24 14 48 - 25 44 27 - 23 20 10 - 24 21 22 41 0 0 6 53 41 35 196 -22 - 24 38 51 - 24 3 50 - 25 32 12 - 23 9 58 - 24 9 45 40 0 0 6 53 55 36 196 -21 - 24 27 0 - 23 52 27 - 25 19 37 - 22 59 20 - 23 57 45 39 0 0 6 54 10 37 197 -21 - 24 14 47 - 23 40 41 - 25 6 43 - 22 48 15 - 23 45 24 38 0 0 6 54 24 37 197 -21 - 24 2 13 - 23 28 32 - 24 53 30 - 22 36 46 - 23 32 40 37 0 0 6 54 39 38 198 -21 - 23 49 17 - 23 16 1 - 24 39 57 - 22 24 51 - 23 19 34 36 0 0 6 54 55 39 198 -20 - 23 36 0 - 23 3 6 - 24 26 6 - 22 12 31 - 23 6 7 35 0 0 6 55 10 40 199 -20 - 23 22 22 - 22 49 50 - 24 11 56 - 21 59 47 - 22 52 18 34 0 0 6 55 26 41 199 -19 - 23 8 24 - 22 36 11 - 23 57 26 - 21 46 39 - 22 38 8 33 0 0 6 55 43 42 200 -19 - 22 54 3 - 22 22 10 - 23 42 38 - 21 33 7 - 22 23 35 32 0 0 6 55 59 43 201 -19 - 22 39 22 - 22 7 46 - 23 27 29 - 21 19 10 - 22 8 41 31 0 0 6 56 16 43 202 -18 - 22 24 20 - 21 53 0 - 23 12 2 - 21 4 49 - 21 53 24 30 0 0 6 56 33 44 202 -18 - 22 8 56 - 21 37 51 - 22 56 14 - 20 50 4 - 21 37 45 29 0 0 6 56 51 45 203 -17 - 21 53 10 - 21 22 19 - 22 40 6 - 20 34 54 - 21 21 44 28 0 0 6 57 9 46 204 -17 - 21 37 1 - 21 6 24 - 22 23 38 - 20 19 19 - 21 5 19 27 0 0 6 57 27 47 205 -16 - 21 20 31 - 20 50 6 - 22 6 48 - 20 3 19 - 20 48 31 26 0 0 6 57 45 47 206 -16 - 21 3 37 - 20 33 23 - 21 49 37 - 19 46 53 - 20 31 18 25 0 0 6 58 4 48 207 -15 - 20 46 19 - 20 16 16 - 21 32 4 - 19 30 2 - 20 13 41 24 0 0 6 58 23 49 208 -15 - 20 28 37 - 19 58 43 - 21 14 8 - 19 12 44 - 19 55 39 23 0 0 6 58 42 50 209 -14 - 20 10 31 - 19 40 45 - 20 55 48 - 18 54 58 - 19 37 11 22 0 0 6 59 1 50 210 -14 - 19 51 59 - 19 22 21 - 20 37 5 - 18 36 45 - 19 18 16 21 0 0 6 59 21 51 211 -13 - 19 33 1 - 19 3 30 - 20 17 57 - 18 18 3 - 18 58 54 20 0 0 6 59 41 52 212 -12 - 19 13 36 - 18 44 10 - 19 58 23 - 17 58 53 - 18 39 4 19 0 0 7 0 1 52 214 -12 - 18 53 43 - 18 24 22 - 19 38 23 - 17 39 12 - 18 18 44 18 0 0 7 0 21 53 215 -11 - 18 33 22 - 18 4 4 - 19 17 55 - 17 19 0 - 17 57 54 17 0 0 7 0 42 53 216 -11 - 18 12 31 - 17 43 16 - 18 56 59 - 16 58 16 - 17 36 34 16 0 0 7 1 3 54 218 -10 - 17 51 9 - 17 21 56 - 18 35 34 - 16 36 58 - 17 14 40 15 0 0 7 1 24 54 219 -9 - 17 29 15 - 17 0 4 - 18 13 38 - 16 15 7 - 16 52 13 14 0 0 7 1 46 55 221 -9 - 17 6 48 - 16 37 37 - 17 51 10 - 15 52 40 - 16 29 12 13 0 0 7 2 7 55 222 -8 - 16 43 46 - 16 14 35 - 17 28 9 - 15 29 37 - 16 5 33 12 0 0 7 2 29 56 224 -7 - 16 20 9 - 15 50 56 - 17 4 34 - 15 5 55 - 15 41 18 11 0 0 7 2 51 56 225 -6 - 15 55 55 - 15 26 39 - 16 40 23 - 14 41 33 - 15 16 23 10 0 0 7 3 13 56 227 -6 - 15 31 1 - 15 1 42 - 16 15 35 - 14 16 31 - 14 50 46 9 0 0 7 3 36 57 229 -5 - 15 5 27 - 14 36 3 - 15 50 8 - 13 50 44 - 14 24 27 8 0 0 7 3 58 57 231 -4 - 14 39 11 - 14 9 41 - 15 24 0 - 13 24 13 - 13 57 24 7 0 0 7 4 21 57 232 -3 - 14 12 11 - 13 42 34 - 14 57 9 - 12 56 55 - 13 29 33 6 0 0 7 4 44 57 234 -2 - 13 44 24 - 13 14 39 - 14 29 34 - 12 28 48 - 13 0 53 5 0 0 7 5 8 57 236 -2 - 13 15 48 - 12 45 55 - 14 1 11 - 11 59 49 - 12 31 22 4 0 0 7 5 31 58 238 -1 - 12 46 22 - 12 16 18 - 13 32 0 - 11 29 56 - 12 0 56 3 0 0 7 5 55 58 240 0 - 12 16 2 - 11 45 47 - 13 1 57 - 10 59 6 - 11 29 34 2 0 0 7 6 18 57 242 1 - 11 44 46 - 11 14 18 - 12 31 0 - 10 27 16 - 10 57 11 1 0 0 7 6 42 57 243 2 - 11 12 31 - 10 41 48 - 11 59 5 - 9 54 24 - 10 23 45 0 0 0 7 7 6 57 245 3 - 10 39 13 - 10 8 14 - 11 26 11 - 9 20 25 - 9 49 13 - 1 0 0 7 7 31 57 247 4 - 10 4 49 - 9 33 33 - 10 52 12 - 8 45 15 Latitude Latitude Latitude Latitude - 9 0 0 - 2 22 9 7 8 4 57 250 5 - 2 47 53 - 1 56 10 - 4 5 12 - 0 35 5 - 8 0 0 - 3 57 18 7 8 43 56 252 7 - 4 22 5 - 3 32 17 - 5 36 40 - 2 14 18 - 7 0 0 - 5 27 18 7 9 21 55 255 8 - 5 51 14 - 5 3 9 - 7 3 19 - 3 48 0 - 6 0 0 - 6 52 30 7 9 56 55 257 10 - 7 15 40 - 6 29 10 - 8 25 27 - 5 16 34 - 5 0 0 - 8 13 14 7 10 30 54 259 11 - 8 35 41 - 7 50 37 - 9 43 22 - 6 40 22 - 4 0 0 - 9 29 46 7 11 3 53 261 13 - 9 51 33 - 9 7 50 -10 57 19 - 7 59 42 - 3 0 0 -10 42 22 7 11 34 52 262 14 -11 3 33 -10 21 3 -12 7 31 - 9 14 54 - 2 0 0 -11 51 17 7 12 4 51 264 15 -12 11 54 -11 30 32 -13 14 13 -10 26 11 - 1 0 0 -12 56 43 7 12 33 50 265 17 -13 16 49 -12 36 29 -14 17 37 -11 33 49 0 0 0 -13 58 52 7 13 0 49 266 18 -14 18 30 -13 39 8 -15 17 52 -12 38 1 1 0 0 -14 57 56 7 13 26 48 267 19 -15 17 7 -14 38 39 -16 15 10 -13 38 58 2 0 0 -15 54 5 7 13 51 47 268 20 -16 12 50 -15 35 13 -17 9 40 -14 36 51 3 0 0 -16 47 27 7 14 15 46 268 22 -17 5 49 -16 28 58 -18 1 30 -15 31 51 4 0 0 -17 38 11 7 14 38 45 269 23 -17 56 12 -17 20 5 -18 50 48 -16 24 7 5 0 0 -18 26 26 7 15 0 44 269 24 -18 44 7 -18 8 40 -19 37 43 -17 13 46 6 0 0 -19 12 18 7 15 21 43 270 25 -19 29 40 -18 54 51 -20 22 20 -18 0 58 7 0 0 -19 55 54 7 15 42 42 270 26 -20 12 58 -19 38 45 -21 4 46 -18 45 48 8 0 0 -20 37 21 7 16 1 41 270 27 -20 54 8 -20 20 29 -21 45 7 -19 28 24 9 0 0 -21 16 43 7 16 20 40 270 29 -21 33 16 -21 0 7 -22 23 27 -20 8 52 10 0 0 -21 54 7 7 16 38 39 270 30 -22 10 25 -21 37 46 -22 59 54 -20 47 17 11 0 0 -22 29 38 7 16 55 38 271 31 -22 45 42 -22 13 30 -23 34 30 -21 23 44 12 0 0 -23 3 19 7 17 11 37 271 32 -23 19 10 -22 47 24 -24 7 20 -21 58 19 13 0 0 -23 35 16 7 17 27 36 270 33 -23 50 55 -23 19 33 -24 38 29 -22 31 6 14 0 0 -24 5 31 7 17 42 35 270 34 -24 20 59 -23 50 0 -25 7 59 -23 2 8 15 0 0 -24 34 9 7 17 57 34 270 35 -24 49 27 -24 18 49 -25 35 56 -23 31 31 16 0 0 -25 1 14 7 18 11 33 270 36 -25 16 22 -24 46 3 -26 2 21 -23 59 16 17 0 0 -25 26 48 7 18 24 32 270 37 -25 41 46 -25 11 46 -26 27 17 -24 25 29 18 0 0 -25 50 54 7 18 37 31 270 38 -26 5 44 -25 36 1 -26 50 49 -24 50 11 19 0 0 -26 13 35 7 18 50 30 270 39 -26 28 16 -25 58 50 -27 12 57 -25 13 26 20 0 0 -26 34 53 7 19 2 29 269 40 -26 49 27 -26 20 17 -27 33 45 -25 35 16 21 0 0 -26 54 52 7 19 13 28 269 41 -27 9 19 -26 40 22 -27 53 15 -25 55 44 22 0 0 -27 13 32 7 19 24 27 269 41 -27 27 52 -26 59 9 -28 11 29 -26 14 52 23 0 0 -27 30 57 7 19 35 26 268 42 -27 45 11 -27 16 40 -28 28 29 -26 32 43 24 0 0 -27 47 7 7 19 45 25 268 43 -28 1 15 -27 32 56 -28 44 16 -26 49 17 25 0 0 -28 2 5 7 19 54 25 268 44 -28 16 8 -27 48 0 -28 58 53 -27 4 37 26 0 0 -28 15 52 7 20 4 24 267 45 -28 29 50 -28 1 52 -29 12 21 -27 18 45 27 0 0 -28 28 30 7 20 13 23 267 46 -28 42 24 -28 14 34 -29 24 41 -27 31 41 28 0 0 -28 40 0 7 20 21 22 267 47 -28 53 50 -28 26 8 -29 35 54 -27 43 28 29 0 0 -28 50 23 7 20 29 21 266 48 -29 4 9 -28 36 35 -29 46 2 -27 54 7 30 0 0 -28 59 41 7 20 37 20 266 49 -29 13 23 -28 45 57 -29 55 6 -28 3 39 31 0 0 -29 7 54 7 20 44 19 265 50 -29 21 33 -28 54 13 -30 3 7 -28 12 5 32 0 0 -29 15 3 7 20 51 18 265 50 -29 28 40 -29 1 25 -30 10 6 -28 19 26 33 0 0 -29 21 10 7 20 58 17 264 51 -29 34 44 -29 7 34 -30 16 2 -28 25 42 34 0 0 -29 26 14 7 21 4 16 264 52 -29 39 46 -29 12 40 -30 20 58 -28 30 55 35 0 0 -29 30 17 7 21 10 16 264 53 -29 43 47 -29 16 45 -30 24 54 -28 35 6 36 0 0 -29 33 19 7 21 16 15 263 54 -29 46 48 -29 19 48 -30 27 50 -28 38 14 37 0 0 -29 35 20 7 21 21 14 263 55 -29 48 48 -29 21 51 -30 29 47 -28 40 20 38 0 0 -29 36 22 7 21 26 13 262 56 -29 49 49 -29 22 53 -30 30 45 -28 41 25 39 0 0 -29 36 23 7 21 31 12 262 56 -29 49 50 -29 22 55 -30 30 44 -28 41 29 40 0 0 -29 35 26 7 21 35 11 261 57 -29 48 51 -29 21 58 -30 29 45 -28 40 33 41 0 0 -29 33 28 7 21 39 10 261 58 -29 46 54 -29 20 0 -30 27 48 -28 38 35 42 0 0 -29 30 32 7 21 42 9 260 59 -29 43 58 -29 17 4 -30 24 53 -28 35 38 43 0 0 -29 26 36 7 21 46 9 260 60 -29 40 3 -29 13 7 -30 20 59 -28 31 40 44 0 0 -29 21 41 7 21 49 8 259 61 -29 35 9 -29 8 12 -30 16 7 -28 26 42 45 0 0 -29 15 47 7 21 52 7 259 62 -29 29 15 -29 2 16 -30 10 18 -28 20 43 46 0 0 -29 8 53 7 21 54 6 258 62 -29 22 23 -28 55 21 -30 3 29 -28 13 43 47 0 0 -29 0 59 7 21 56 5 258 63 -29 14 31 -28 47 25 .. .. .. -28 5 42 48 0 0 -28 52 5 7 21 58 4 257 64 -29 5 38 -28 38 29 .. .. .. -27 56 40 49 0 0 -28 42 10 7 21 59 3 257 65 -28 55 46 -28 28 32 .. .. .. -27 46 37 50 0 0 -28 31 15 7 22 0 2 256 66 -28 44 53 -28 17 34 .. .. .. -27 35 31 51 0 0 -28 19 17 7 22 1 1 256 67 -28 32 59 -28 5 34 .. .. .. -27 23 22 52 0 0 -28 6 18 7 22 1 1 255 68 -28 20 2 -27 52 32 .. .. .. -27 10 10 Data for the target star ------------------------ * name: TYC 5543-00211-1 * constellation : Virgo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 13 11 05.4729 DE: -13 03 19.715 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .020 ) * V mag [mag]: 11.1 * B mag [mag]: 11.7 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (467) Laura approx. diameter [km]: 42 approx. diameter ["]: .022 distance from Earth [AU]: 2.63300 * orbital information: orbit source: Preston date of fit: 2008 Jan 17 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 784 number of rejected observations: 35 time covered by the observations: 1901 Jan 09 - 2007 May 18 1 sigma uncertainty ellipse (major, minor, PA): 0.032, 0.018, 116° remarks: * orbital elements for (467) Laura : Mean anomaly = 118.89678912 deg Arg. of pericenter = 92.40415649 deg Long. of node = 322.62078137 deg Inclination = 6.45122941 deg Eccentricity = 0.11239438 Semimajor axis = 2.94152959 AU Perihelion dist = 2.61091818 AU Mag: H = 10.77, G = 0.15 Epoch of elements : MJD 54498.29500000 TDT (2008 Feb 02.295) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Feb 02 467 Laura 7h 5.7m UT 11.1 13 11 5.473-13 3 19.71TYC 5543-00211-1 11.7 16.0 42 7.7 2.633 0.341 -9.06 -40.516 -13.053 76.98 -16.97 7.0952 .47065 .25859 1.49665 -2.71321 -0.00513 0.00232 2000 117.2762452008 125.00000 92.404156322.620781 6.4512290.112394382.941529592.6109181810.55 0.15 RATE 1.9536390 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.040 0.026 106.3 2.530 0.034 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 17, 18:21 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org