IOTA/IOTA-ES occultation update for (566) Stereoskopia / TYC 6359-01324-1 event on 2012 Nov 12, 22:39 UT Visible from Africa Summary ------- On 2012 Nov 12 UT, the 167 km diameter asteroid (566) Stereoskopia will occult a 11.2 mag star in the constellation Capricornus 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 2.7 mag to 13.8 mag (the magnitude of the asteroid) for at most 8.3 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 96 * date and approx. time of event: 2012 Nov 12, 22:40 - 2012 Nov 12, 22:44 UT * geocentric midpoint of event [JD]: 2456244.4442125 * magnitude of target star: 11.2 * magnitude drop [mag]: 2.7 * estimated maximum duration [s]: 8.3 * Moon: 1 % sunlit, 97° distance * Sun: 84° distance * rough path description: Africa The occultation path -------------------- * approximate projected width [km]: 178 * 1 sigma uncertainty interval [path widths]: +/- 0.41 * 1 sigma uncertainty interval [seconds]: +/- 3.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .037 +/- .030) * 1 sigma uncertainty ellipse (major, minor, PA): ( .038", .030", 87° ) * approx speed of asteroid's shadow [km/s]: 20.1392 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6359-01324-1 by 566 Stereoskopia on 2012 Nov 12 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 - 59 0 0 -37 14 10 22 40 6 69 317 -1 -38 9 15 -36 19 26 -38 54 42 -35 34 49 - 58 0 0 -36 47 33 22 40 11 69 314 -1 -37 42 48 -35 52 40 -38 28 22 -35 7 55 - 57 0 0 -36 20 29 22 40 17 69 311 -2 -37 15 52 -35 25 27 -38 1 35 -34 40 34 - 56 0 0 -35 52 57 22 40 22 68 308 -3 -36 48 29 -34 57 46 -37 34 19 -34 12 46 - 55 0 0 -35 24 57 22 40 27 68 305 -4 -36 20 39 -34 29 38 -37 6 36 -33 44 31 - 54 0 0 -34 56 31 22 40 32 67 303 -5 -35 52 22 -34 1 3 -36 38 26 -33 15 50 - 53 0 0 -34 27 39 22 40 37 67 300 -6 -35 23 37 -33 32 3 -36 9 49 -32 46 43 - 52 0 0 -33 58 20 22 40 43 66 297 -7 -34 54 27 -33 2 36 -35 40 45 -32 17 10 - 51 0 0 -33 28 36 22 40 48 66 295 -8 -34 24 51 -32 32 45 -35 11 16 -31 47 12 - 50 0 0 -32 58 27 22 40 53 65 293 -9 -33 54 49 -32 2 28 -34 41 21 -31 16 49 - 49 0 0 -32 27 54 22 40 59 65 290 -10 -33 24 23 -31 31 47 -34 11 0 -30 46 3 - 48 0 0 -31 56 56 22 41 4 64 288 -11 -32 53 32 -31 0 43 -33 40 15 -30 14 53 - 47 0 0 -31 25 35 22 41 9 63 286 -12 -32 22 18 -30 29 15 -33 9 7 -29 43 20 - 46 0 0 -30 53 51 22 41 15 63 284 -13 -31 50 41 -29 57 26 -32 37 34 -29 11 26 - 45 0 0 -30 21 46 22 41 20 62 282 -14 -31 18 41 -29 25 14 -32 5 40 -28 39 10 - 44 0 0 -29 49 19 22 41 25 61 280 -15 -30 46 19 -28 52 42 -31 33 23 -28 6 33 - 43 0 0 -29 16 31 22 41 31 60 279 -16 -30 13 37 -28 19 50 -31 0 45 -27 33 37 - 42 0 0 -28 43 24 22 41 36 60 277 -17 -29 40 35 -27 46 38 -30 27 46 -27 0 22 - 41 0 0 -28 9 59 22 41 42 59 275 -18 -29 7 13 -27 13 8 -29 54 29 -26 26 48 - 40 0 0 -27 36 15 22 41 47 58 274 -20 -28 33 33 -26 39 21 -29 20 52 -25 52 58 - 39 0 0 -27 2 14 22 41 52 57 273 -21 -27 59 36 -26 5 17 -28 46 58 -25 18 51 - 38 0 0 -26 27 58 22 41 57 56 271 -22 -27 25 23 -25 30 57 -28 12 46 -24 44 30 - 37 0 0 -25 53 26 22 42 3 55 270 -23 -26 50 54 -24 56 23 -27 38 20 -24 9 54 - 36 0 0 -25 18 41 22 42 8 54 269 -24 -26 16 10 -24 21 36 -27 3 38 -23 35 5 - 35 0 0 -24 43 43 22 42 13 53 267 -25 -25 41 14 -23 46 36 -26 28 43 -23 0 4 - 34 0 0 -24 8 33 22 42 18 52 266 -26 -25 6 5 -23 11 25 -25 53 35 -22 24 52 - 33 0 0 -23 33 12 22 42 23 52 265 -27 -24 30 45 -22 36 4 -25 18 15 -21 49 30 - 32 0 0 -22 57 42 22 42 29 51 264 -28 -23 55 15 -22 0 34 -24 42 45 -21 14 0 - 31 0 0 -22 22 4 22 42 34 50 263 -29 -23 19 36 -21 24 56 -24 7 6 -20 38 22 - 30 0 0 -21 46 18 22 42 39 49 262 -30 -22 43 50 -20 49 11 -23 31 20 -20 2 38 - 29 0 0 -21 10 27 22 42 43 47 261 -32 -22 7 57 -20 13 21 -22 55 26 -19 26 49 - 28 0 0 -20 34 31 22 42 48 46 261 -33 -21 31 59 -19 37 27 -22 19 27 -18 50 56 - 27 0 0 -19 58 31 22 42 53 45 260 -34 -20 55 58 -19 1 29 -21 43 23 -18 15 1 - 26 0 0 -19 22 30 22 42 58 44 259 -35 -20 19 54 -18 25 30 -21 7 17 -17 39 4 - 25 0 0 -18 46 27 22 43 2 43 258 -36 -19 43 48 -17 49 31 -20 31 9 -17 3 7 - 24 0 0 -18 10 25 22 43 7 42 258 -37 -19 7 42 -17 13 32 -19 55 0 -16 27 11 - 23 0 0 -17 34 24 22 43 11 41 257 -38 -18 31 38 -16 37 36 -19 18 52 -15 51 18 - 22 0 0 -16 58 26 22 43 16 40 256 -39 -17 55 35 -16 1 42 -18 42 46 -15 15 28 - 21 0 0 -16 22 33 22 43 20 39 256 -41 -17 19 37 -15 25 53 -18 6 44 -14 39 42 - 20 0 0 -15 46 44 22 43 24 38 255 -42 -16 43 43 -14 50 10 -17 30 46 -14 4 3 - 19 0 0 -15 11 2 22 43 28 37 255 -43 -16 7 56 -14 14 33 -16 54 54 -13 28 31 - 18 0 0 -14 35 28 22 43 32 36 254 -44 -15 32 15 -13 39 5 -16 19 8 -12 53 7 - 17 0 0 -14 0 3 22 43 36 35 254 -45 -14 56 44 -13 3 45 -15 43 32 -12 17 53 - 16 0 0 -13 24 47 22 43 40 33 253 -46 -14 21 22 -12 28 37 -15 8 4 -11 42 50 - 15 0 0 -12 49 43 22 43 44 32 253 -47 -13 46 11 -11 53 39 -14 32 47 -11 7 58 - 14 0 0 -12 14 52 22 43 47 31 253 -48 -13 11 12 -11 18 55 -13 57 42 -10 33 19 - 13 0 0 -11 40 13 22 43 51 30 252 -49 -12 36 26 -10 44 24 -13 22 50 - 9 58 54 - 12 0 0 -11 5 50 22 43 54 29 252 -51 -12 1 54 -10 10 8 -12 48 12 - 9 24 44 - 11 0 0 -10 31 41 22 43 57 28 252 -52 -11 27 38 - 9 36 8 -12 13 49 - 8 50 50 - 10 0 0 - 9 57 50 22 44 0 27 251 -53 -10 53 38 - 9 2 24 -11 39 42 - 8 17 14 - 9 0 0 - 9 24 16 22 44 3 26 251 -54 -10 19 56 - 8 28 59 -11 5 53 - 7 43 55 - 8 0 0 - 8 51 0 22 44 6 25 251 -55 - 9 46 32 - 7 55 52 -10 32 21 - 7 10 55 - 7 0 0 - 8 18 4 22 44 9 23 251 -56 - 9 13 27 - 7 23 4 - 9 59 9 - 6 38 15 - 6 0 0 - 7 45 29 22 44 11 22 250 -57 - 8 40 42 - 6 50 38 - 9 26 16 - 6 5 55 - 5 0 0 - 7 13 14 22 44 14 21 250 -58 - 8 8 18 - 6 18 32 - 8 53 45 - 5 33 57 - 4 0 0 - 6 41 22 22 44 16 20 250 -59 - 7 36 16 - 5 46 49 - 8 21 35 - 5 2 21 - 3 0 0 - 6 9 52 22 44 18 19 250 -60 - 7 4 37 - 5 15 29 - 7 49 48 - 4 31 8 - 2 0 0 - 5 38 46 22 44 21 18 250 -61 - 6 33 21 - 4 44 32 - 7 18 24 - 4 0 19 - 1 0 0 - 5 8 4 22 44 23 17 250 -62 - 6 2 29 - 4 13 59 - 6 47 24 - 3 29 54 0 0 0 - 4 37 47 22 44 24 16 249 -63 - 5 32 2 - 3 43 52 - 6 16 49 - 2 59 55 1 0 0 - 4 7 55 22 44 26 14 249 -64 - 5 2 1 - 3 14 10 - 5 46 40 - 2 30 21 2 0 0 - 3 38 30 22 44 28 13 249 -65 - 4 32 26 - 2 44 55 - 5 16 56 - 2 1 13 3 0 0 - 3 9 32 22 44 29 12 249 -66 - 4 3 18 - 2 16 6 - 4 47 40 - 1 32 32 4 0 0 - 2 41 0 22 44 30 11 249 -67 - 3 34 37 - 1 47 45 - 4 18 50 - 1 4 19 5 0 0 - 2 12 57 22 44 32 10 249 -68 - 3 6 23 - 1 19 51 - 3 50 29 - 0 36 33 6 0 0 - 1 45 22 22 44 33 9 249 -68 - 2 38 38 - 0 52 26 - 3 22 35 - 0 9 15 7 0 0 - 1 18 16 22 44 34 8 249 -69 - 2 11 22 - 0 25 29 - 2 55 11 0 17 33 8 0 0 - 0 51 39 22 44 34 7 249 -70 - 1 44 35 0 0 58 - 2 28 16 0 43 53 9 0 0 - 0 25 31 22 44 35 6 249 -71 - 1 18 18 0 26 56 - 2 1 50 1 9 43 10 0 0 0 0 6 22 44 36 5 249 -71 - 0 52 31 0 52 24 - 1 35 55 1 35 3 11 0 0 0 25 14 22 44 36 3 249 -72 - 0 27 14 1 17 22 - 1 10 30 1 59 54 12 0 0 0 49 51 22 44 36 2 249 -73 - 0 2 28 1 41 49 - 0 45 36 2 24 14 13 0 0 1 13 56 22 44 37 1 249 -73 0 21 48 2 5 46 - 0 21 13 2 48 3 14 0 0 1 37 31 22 44 37 0 249 -74 0 45 32 .. .. .. 0 2 39 .. .. .. Uncertainty in time = +/- 4 secs Prediction of 2012 Oct 26.0 Data for the target star ------------------------ * name: TYC 6359-01324-1 * constellation : Capricornus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 13 07.1242 DE: -21 04 40.664 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .034, .029 ) * V mag [mag]: 11.2 * B mag [mag]: 12.1 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (566) Stereoskopia approx. diameter [km]: 167 approx. diameter ["]: .076 distance from Earth [AU]: 3.03100 * orbital information: orbit source: Preston date of fit: 2012 Oct 25 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1038 number of rejected observations: 155 time covered by the observations: 1905 Jun 04 - 2012 Oct 19 1 sigma uncertainty ellipse (major, minor, PA): 0.017, 0.009, 76° remarks: * orbital elements for (566) Stereoskopia : Mean anomaly = 325.64688252 deg Arg. of pericenter = 295.36938126 deg Long. of node = 80.22559592 deg Inclination = 4.89969868 deg Eccentricity = 0.11222322 Semimajor axis = 3.37963863 AU Perihelion dist = 3.00036469 AU Mag: H = 7.89, G = 0.15 Epoch of elements : MJD 56243.94400000 TDT (2012 Nov 12.944) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 12 566 Stereoskopia 22h 39.7m UT 11.2 21 13 7.124-21 4 40.66TYC 6359-01324-1 12.1 13.8 167 8.3 3.031 2.188 12.25 -74.0959 -21.082 -163.85 -17.99 22.6611 0.12947 -0.31638 10.55412 4.22158 0.00569 0.00172 2000 325.021227201211 9.00000295.369381 80.225596 4.8996990.11222322 3.3796386 3.0003647 8.0 5.00.15 RATE 1.5863490 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.038 0.030 87 1.41 0.031 0 0 2-4 056226.0020121112_1324-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 22:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org