IOTA/IOTA-ES occultation update for (22) Kalliope / UCAC2 19691490 event on 2009 Sep 04, 20:33 UT Visible from Summary ------- On 2009 Sep 04 UT, the 181 km diameter asteroid (22) Kalliope will occult a 10.8 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.6 mag to 12.2 mag (the magnitude of the asteroid) for at most 12.9 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: 99 * date and approx. time of event: 2009 Sep 04, 20:33 - 2009 Sep 04, 20:41 UT * magnitude of target star: 10.8 * magnitude drop [mag]: 1.6 * estimated maximum duration [s]: 12.9 * Moon: 100 % sunlit, 90° distance * Sun: 92° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 183 * 1 sigma uncertainty interval [path widths]: +/- 0.30 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .026 +/- .025) * 1 sigma uncertainty ellipse (major, minor, PA): ( .026", .025", 94° ) * approx speed of asteroid's shadow [km/s]: 13.9885 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 19691490 by 22 Kalliope on 2009 Sep 4 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 - 43 0 0 -37 12 34 20 33 36 81 15 -1 -38 3 1 -36 22 13 -38 33 21 -35 52 3 - 42 0 0 -37 21 46 20 33 43 81 8 -2 -38 12 8 -36 31 30 -38 42 24 -36 1 23 - 41 0 0 -37 30 30 20 33 49 81 2 -2 -38 20 47 -36 40 19 -38 51 0 -36 10 15 - 40 0 0 -37 38 46 20 33 56 81 356 -3 -38 28 58 -36 48 40 -38 59 9 -36 18 40 - 39 0 0 -37 46 35 20 34 2 81 350 -4 -38 36 43 -36 56 34 -39 6 50 -36 26 36 - 38 0 0 -37 53 56 20 34 9 81 344 -5 -38 43 59 -37 3 59 -39 14 4 -36 34 4 - 37 0 0 -38 0 50 20 34 15 80 339 -6 -38 50 49 -37 10 57 -39 20 52 -36 41 4 - 36 0 0 -38 7 17 20 34 22 80 334 -6 -38 57 12 -37 17 28 -39 27 12 -36 47 37 - 35 0 0 -38 13 16 20 34 28 79 330 -7 -39 3 8 -37 23 30 -39 33 6 -36 53 42 - 34 0 0 -38 18 48 20 34 35 79 326 -8 -39 8 37 -37 29 6 -39 38 33 -36 59 19 - 33 0 0 -38 23 54 20 34 41 78 322 -9 -39 13 39 -37 34 14 -39 43 33 -37 4 29 - 32 0 0 -38 28 32 20 34 47 78 319 -10 -39 18 14 -37 38 55 -39 48 7 -37 9 12 - 31 0 0 -38 32 43 20 34 54 77 315 -11 -39 22 23 -37 43 9 -39 52 14 -37 13 27 - 30 0 0 -38 36 28 20 35 0 77 312 -11 -39 26 5 -37 46 56 -39 55 55 -37 17 15 - 29 0 0 -38 39 45 20 35 6 76 310 -12 -39 29 21 -37 50 15 -39 59 10 -37 20 36 - 28 0 0 -38 42 36 20 35 13 75 307 -13 -39 32 10 -37 53 8 -40 1 58 -37 23 30 - 27 0 0 -38 45 1 20 35 19 75 305 -14 -39 34 33 -37 55 34 -40 4 20 -37 25 56 - 26 0 0 -38 46 59 20 35 25 74 303 -15 -39 36 30 -37 57 33 -40 6 16 -37 27 56 - 25 0 0 -38 48 30 20 35 31 73 301 -15 -39 38 0 -37 59 5 -40 7 46 -37 29 29 - 24 0 0 -38 49 34 20 35 37 73 299 -16 -39 39 4 -38 0 10 -40 8 50 -37 30 34 - 23 0 0 -38 50 13 20 35 44 72 297 -17 -39 39 42 -38 0 49 -40 9 27 -37 31 13 - 22 0 0 -38 50 24 20 35 50 71 295 -18 -39 39 54 -38 1 1 -40 9 39 -37 31 25 - 21 0 0 -38 50 10 20 35 56 71 294 -19 -39 39 39 -38 0 46 -40 9 24 -37 31 10 - 20 0 0 -38 49 28 20 36 2 70 292 -19 -39 38 58 -38 0 4 -40 8 44 -37 30 28 - 19 0 0 -38 48 20 20 36 8 69 291 -20 -39 37 51 -37 58 55 -40 7 37 -37 29 19 - 18 0 0 -38 46 46 20 36 14 68 289 -21 -39 36 18 -37 57 20 -40 6 4 -37 27 43 - 17 0 0 -38 44 45 20 36 20 68 288 -22 -39 34 19 -37 55 18 -40 4 5 -37 25 40 - 16 0 0 -38 42 18 20 36 26 67 287 -22 -39 31 53 -37 52 49 -40 1 41 -37 23 11 - 15 0 0 -38 39 24 20 36 32 66 285 -23 -39 29 1 -37 49 54 -39 58 50 -37 20 14 - 14 0 0 -38 36 4 20 36 38 65 284 -24 -39 25 42 -37 46 31 -39 55 33 -37 16 50 - 13 0 0 -38 32 17 20 36 43 65 283 -25 -39 21 58 -37 42 42 -39 51 49 -37 13 0 - 12 0 0 -38 28 3 20 36 49 64 282 -26 -39 17 46 -37 38 26 -39 47 40 -37 8 42 - 11 0 0 -38 23 23 20 36 55 63 281 -26 -39 13 9 -37 33 42 -39 43 4 -37 3 57 - 10 0 0 -38 18 15 20 37 1 62 280 -27 -39 8 5 -37 28 32 -39 38 1 -36 58 45 - 9 0 0 -38 12 41 20 37 7 61 279 -28 -39 2 34 -37 22 55 -39 32 33 -36 53 5 - 8 0 0 -38 6 40 20 37 12 61 278 -29 -38 56 37 -37 16 50 -39 26 38 -36 46 59 - 7 0 0 -38 0 13 20 37 18 60 277 -30 -38 50 13 -37 10 18 -39 20 16 -36 40 25 - 6 0 0 -37 53 18 20 37 24 59 276 -31 -38 43 22 -37 3 19 -39 13 27 -36 33 23 - 5 0 0 -37 45 55 20 37 29 58 275 -31 -38 36 4 -36 55 53 -39 6 12 -36 25 54 - 4 0 0 -37 38 6 20 37 35 58 274 -32 -38 28 19 -36 47 59 -38 58 30 -36 17 58 - 3 0 0 -37 29 50 20 37 41 57 273 -33 -38 20 8 -36 39 38 -38 50 22 -36 9 33 - 2 0 0 -37 21 6 20 37 46 56 272 -34 -38 11 29 -36 30 49 -38 41 46 -36 0 41 - 1 0 0 -37 11 54 20 37 52 55 271 -35 -38 2 23 -36 21 32 -38 32 43 -35 51 22 0 0 0 -37 2 15 20 37 57 54 270 -35 -37 52 49 -36 11 48 -38 23 13 -35 41 34 1 0 0 -36 52 8 20 38 2 54 269 -36 -37 42 48 -36 1 35 -38 13 15 -35 31 18 2 0 0 -36 41 34 20 38 8 53 269 -37 -37 32 20 -35 50 55 -38 2 50 -35 20 34 3 0 0 -36 30 32 20 38 13 52 268 -38 -37 21 24 -35 39 46 -37 51 58 -35 9 22 4 0 0 -36 19 1 20 38 19 51 267 -39 -37 10 0 -35 28 10 -37 40 38 -34 57 41 5 0 0 -36 7 3 20 38 24 50 266 -40 -36 58 8 -35 16 5 -37 28 50 -34 45 33 6 0 0 -35 54 37 20 38 29 49 265 -40 -36 45 48 -35 3 31 -37 16 35 -34 32 55 7 0 0 -35 41 42 20 38 34 49 265 -41 -36 33 0 -34 50 30 -37 3 51 -34 19 49 8 0 0 -35 28 19 20 38 39 48 264 -42 -36 19 45 -34 36 59 -36 50 40 -34 6 15 9 0 0 -35 14 27 20 38 45 47 263 -43 -36 6 0 -34 23 0 -36 37 0 -33 52 11 10 0 0 -35 0 7 20 38 50 46 262 -44 -35 51 48 -34 8 33 -36 22 52 -33 37 39 11 0 0 -34 45 18 20 38 55 45 262 -45 -35 37 7 -33 53 36 -36 8 15 -33 22 38 12 0 0 -34 30 1 20 39 0 44 261 -46 -35 21 57 -33 38 11 -35 53 11 -33 7 8 13 0 0 -34 14 14 20 39 5 43 260 -46 -35 6 19 -33 22 17 -35 37 37 -32 51 9 14 0 0 -33 57 59 20 39 9 42 260 -47 -34 50 12 -33 5 53 -35 21 35 -32 34 41 15 0 0 -33 41 15 20 39 14 42 259 -48 -34 33 36 -32 49 1 -35 5 4 -32 17 44 16 0 0 -33 24 2 20 39 19 41 258 -49 -34 16 31 -32 31 40 -34 48 5 -32 0 17 17 0 0 -33 6 20 20 39 24 40 258 -50 -33 58 58 -32 13 49 -34 30 36 -31 42 22 18 0 0 -32 48 9 20 39 28 39 257 -51 -33 40 55 -31 55 29 -34 12 39 -31 23 57 19 0 0 -32 29 28 20 39 33 38 256 -52 -33 22 24 -31 36 40 -33 54 13 -31 5 2 20 0 0 -32 10 19 20 39 37 37 256 -53 -33 3 23 -31 17 22 -33 35 18 -30 45 39 21 0 0 -31 50 40 20 39 42 36 255 -53 -32 43 54 -30 57 34 -33 15 54 -30 25 46 22 0 0 -31 30 33 20 39 46 35 255 -54 -32 23 55 -30 37 18 -32 56 1 -30 5 24 23 0 0 -31 9 56 20 39 51 34 254 -55 -32 3 28 -30 16 32 -32 35 39 -29 44 33 24 0 0 -30 48 50 20 39 55 33 253 -56 -31 42 31 -29 55 17 -32 14 47 -29 23 13 25 0 0 -30 27 16 20 39 59 32 253 -57 -31 21 5 -29 33 34 -31 53 27 -29 1 24 26 0 0 -30 5 12 20 40 3 32 252 -58 -30 59 11 -29 11 21 -31 31 39 -28 39 6 27 0 0 -29 42 40 20 40 7 31 252 -59 -30 36 48 -28 48 39 -31 9 21 -28 16 19 28 0 0 -29 19 39 20 40 11 30 251 -60 -30 13 56 -28 25 29 -30 46 35 -27 53 3 29 0 0 -28 56 9 20 40 15 29 251 -61 -29 50 36 -28 1 50 -30 23 20 -27 29 19 30 0 0 -28 32 11 20 40 18 28 250 -62 -29 26 47 -27 37 43 -29 59 37 -27 5 6 31 0 0 -28 7 45 20 40 22 27 250 -62 -29 2 30 -27 13 8 -29 35 25 -26 40 26 32 0 0 -27 42 51 20 40 26 26 249 -63 -28 37 45 -26 48 5 -29 10 46 -26 15 17 33 0 0 -27 17 29 20 40 29 25 249 -64 -28 12 32 -26 22 34 -28 45 38 -25 49 41 34 0 0 -26 51 39 20 40 32 24 248 -65 -27 46 51 -25 56 36 -28 20 3 -25 23 38 35 0 0 -26 25 23 20 40 35 23 248 -66 -27 20 44 -25 30 11 -27 54 1 -24 57 7 36 0 0 -25 58 39 20 40 39 22 247 -67 -26 54 9 -25 3 19 -27 27 31 -24 30 10 37 0 0 -25 31 29 20 40 42 21 247 -68 -26 27 7 -24 36 0 -27 0 35 -24 2 47 38 0 0 -25 3 53 20 40 44 20 246 -69 -25 59 40 -24 8 16 -26 33 12 -23 34 57 39 0 0 -24 35 51 20 40 47 19 246 -70 -25 31 46 -23 40 6 -26 5 24 -23 6 43 40 0 0 -24 7 24 20 40 50 18 245 -71 -25 3 27 -23 11 31 -25 37 10 -22 38 3 41 0 0 -23 38 32 20 40 52 17 245 -71 -24 34 43 -22 42 31 -25 8 30 -22 8 58 42 0 0 -23 9 16 20 40 54 16 245 -72 -24 5 34 -22 13 7 -24 39 26 -21 39 30 43 0 0 -22 39 36 20 40 57 14 244 -73 -23 36 2 -21 43 19 -24 9 58 -21 9 38 44 0 0 -22 9 32 20 40 59 13 244 -74 -23 6 5 -21 13 9 -23 40 6 -20 39 23 45 0 0 -21 39 6 20 41 1 12 243 -75 -22 35 46 -20 42 36 -23 9 52 -20 8 46 46 0 0 -21 8 18 20 41 2 11 243 -75 -22 5 5 -20 11 41 -22 39 14 -19 37 47 47 0 0 -20 37 9 20 41 4 10 243 -76 -21 34 2 -19 40 25 -22 8 15 -19 6 27 48 0 0 -20 5 39 20 41 5 9 242 -77 -21 2 38 -19 8 49 -21 36 55 -18 34 47 49 0 0 -19 33 49 20 41 7 8 242 -77 -20 30 54 -18 36 53 -21 5 15 -18 2 48 50 0 0 -19 1 39 20 41 8 7 242 -78 -19 58 51 -18 4 38 -20 33 15 -17 30 30 51 0 0 -18 29 12 20 41 9 6 241 -78 -19 26 28 -17 32 5 -20 0 55 -16 57 54 52 0 0 -17 56 27 20 41 10 5 241 -79 -18 53 48 -16 59 15 -19 28 18 -16 25 1 53 0 0 -17 23 25 20 41 10 4 241 -79 -18 20 51 -16 26 9 -18 55 24 -15 51 52 54 0 0 -16 50 7 20 41 11 3 240 -79 -17 47 37 -15 52 47 -18 22 13 -15 18 27 55 0 0 -16 16 34 20 41 11 1 240 -79 -17 14 8 -15 19 10 -17 48 46 -14 44 48 56 0 0 -15 42 47 20 41 11 0 240 -79 -16 40 25 .. .. .. -17 15 5 .. .. .. Uncertainty in time = +/- 4 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: UCAC2 19691490 * constellation : Scorpius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 16 46 50.4894 DE: -29 02 54.261 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .024, .024 ) * V mag [mag]: 10.8 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (22) Kalliope approx. diameter [km]: 181 approx. diameter ["]: .084 distance from Earth [AU]: 2.95800 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1483 number of rejected observations: 166 time covered by the observations: 1904 May 05 - 2008 Mar 07 1 sigma uncertainty ellipse (major, minor, PA): 0.010, 0.007, 114° remarks: * orbital elements for (22) Kalliope : Mean anomaly = 218.17621836 deg Arg. of pericenter = 355.57477434 deg Long. of node = 66.22622559 deg Inclination = 13.70940274 deg Eccentricity = 0.10259317 Semimajor axis = 2.90806227 AU Perihelion dist = 2.60971495 AU Mag: H = 6.39, G = 0.21 Epoch of elements : MJD 55078.85700000 TDT (2009 Sep 04.857) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Sep 4 22 Kalliope 20h 33.7m UT 10.8 16 46 50.489-29 2 54.26UCAC2 19691490 0.0 12.2 181 12.9 2.958 1.766 -3.90 -40.7991 -29.047 -128.70 6.89 20.5610 -0.02498 -0.13994 7.78580 -1.31170 0.00566 -0.00070 2000 216.4159242009 827.00000355.574774 66.226226 13.7094030.10259317 2.9080623 2.6097149 6.5 5.00.21 RATE 1.9874610 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.026 0.025 94 1.30 0.025 1 38 1065 54545.5020090904_691490 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 12:53 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org