IOTA/IOTA-ES occultation update for (67) Asia / UCAC2 27000649 event on 2012 Oct 03, 21:47 UT Visible from Africa Summary ------- On 2012 Oct 03 UT, the 62 km diameter asteroid (67) Asia will occult a 11.8 mag star in the constellation Sagittarius 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 0.8 mag to 11.8 mag (the magnitude of the asteroid) for at most 5.0 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: 40 * date and approx. time of event: 2012 Oct 03, 21:44 - 2012 Oct 03, 21:55 UT * geocentric midpoint of event [JD]: 2456204.40804583 * magnitude of target star: 11.8 * magnitude drop [mag]: 0.8 * estimated maximum duration [s]: 5.0 * Moon: 87 % sunlit, 114° distance * Sun: 108° distance * rough path description: Africa The occultation path -------------------- * approximate projected width [km]: 64 * 1 sigma uncertainty interval [path widths]: +/- 1.65 * 1 sigma uncertainty interval [seconds]: +/- 8.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .098 +/- .097) * 1 sigma uncertainty ellipse (major, minor, PA): ( .098", .097", 90° ) * approx speed of asteroid's shadow [km/s]: 12.3912 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 27000649 by 67 Asia on 2012 Oct 3 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 3 58 7 21 44 28 64 132 0 3 40 28 4 15 48 2 42 23 5 14 18 - 58 0 0 3 47 47 21 44 37 65 134 -1 3 30 9 4 5 27 2 32 6 5 3 56 - 57 0 0 3 37 42 21 44 46 65 135 -2 3 20 4 3 55 21 2 22 3 4 53 47 - 56 0 0 3 27 50 21 44 55 66 136 -3 3 10 13 3 45 29 2 12 14 4 43 53 - 55 0 0 3 18 13 21 45 4 67 138 -4 3 0 36 3 35 51 2 2 39 4 34 13 - 54 0 0 3 8 50 21 45 13 68 140 -5 2 51 14 3 26 27 1 53 19 4 24 48 - 53 0 0 2 59 42 21 45 22 69 141 -6 2 42 7 3 17 19 1 44 14 4 15 37 - 52 0 0 2 50 49 21 45 31 69 143 -7 2 33 15 3 8 25 1 35 24 4 6 42 - 51 0 0 2 42 12 21 45 40 70 146 -8 2 24 37 2 59 47 1 26 49 3 58 1 - 50 0 0 2 33 49 21 45 49 71 148 -9 2 16 16 2 51 24 1 18 29 3 49 36 - 49 0 0 2 25 42 21 45 58 71 150 -10 2 8 9 2 43 17 1 10 24 3 41 27 - 48 0 0 2 17 51 21 46 8 72 153 -11 2 0 19 2 35 25 1 2 36 3 33 33 - 47 0 0 2 10 16 21 46 17 73 156 -12 1 52 44 2 27 49 0 55 2 3 25 56 - 46 0 0 2 2 56 21 46 26 73 159 -14 1 45 25 2 20 29 0 47 45 3 18 34 - 45 0 0 1 55 53 21 46 36 74 162 -15 1 38 22 2 13 25 0 40 44 3 11 28 - 44 0 0 1 49 6 21 46 45 74 165 -16 1 31 35 2 6 37 0 33 59 3 4 39 - 43 0 0 1 42 35 21 46 54 74 169 -17 1 25 5 2 0 6 0 27 30 2 58 6 - 42 0 0 1 36 21 21 47 4 75 172 -18 1 18 51 1 53 51 0 21 18 2 51 50 - 41 0 0 1 30 23 21 47 13 75 176 -19 1 12 54 1 47 53 0 15 22 2 45 50 - 40 0 0 1 24 42 21 47 22 75 180 -20 1 7 13 1 42 12 0 9 43 2 40 7 - 39 0 0 1 19 17 21 47 32 75 184 -21 1 1 49 1 36 47 0 4 20 2 34 41 - 38 0 0 1 14 10 21 47 41 75 188 -22 0 56 42 1 31 39 - 0 0 45 2 29 32 - 37 0 0 1 9 20 21 47 50 75 192 -23 0 51 52 1 26 48 - 0 5 34 2 24 40 - 36 0 0 1 4 46 21 48 0 75 196 -24 0 47 19 1 22 15 - 0 10 6 2 20 5 - 35 0 0 1 0 30 21 48 9 74 199 -25 0 43 3 1 17 58 - 0 14 21 2 15 47 - 34 0 0 0 56 31 21 48 18 74 203 -26 0 39 5 1 13 59 - 0 18 18 2 11 47 - 33 0 0 0 52 49 21 48 28 74 206 -27 0 35 23 1 10 17 - 0 21 59 2 8 4 - 32 0 0 0 49 25 21 48 37 73 209 -28 0 31 59 1 6 52 - 0 25 22 2 4 38 - 31 0 0 0 46 18 21 48 46 73 213 -29 0 28 52 1 3 44 - 0 28 28 2 1 30 - 30 0 0 0 43 28 21 48 55 72 215 -30 0 26 3 1 0 55 - 0 31 17 1 58 39 - 29 0 0 0 40 56 21 49 5 72 218 -31 0 23 31 0 58 22 - 0 33 48 1 56 6 - 28 0 0 0 38 41 21 49 14 71 220 -32 0 21 16 0 56 7 - 0 36 2 1 53 50 - 27 0 0 0 36 44 21 49 23 70 223 -33 0 19 19 0 54 10 - 0 37 58 1 51 53 - 26 0 0 0 35 4 21 49 32 70 225 -34 0 17 40 0 52 30 - 0 39 37 1 50 12 - 25 0 0 0 33 42 21 49 41 69 227 -35 0 16 18 0 51 8 - 0 40 59 1 48 50 - 24 0 0 0 32 38 21 49 50 68 229 -36 0 15 14 0 50 4 - 0 42 3 1 47 45 - 23 0 0 0 31 51 21 49 59 67 230 -37 0 14 27 0 49 17 - 0 42 49 1 46 58 - 22 0 0 0 31 22 21 50 8 67 232 -38 0 13 58 0 48 47 - 0 43 18 1 46 28 - 21 0 0 0 31 10 21 50 17 66 233 -39 0 13 46 0 48 36 - 0 43 30 1 46 16 - 20 0 0 0 31 16 21 50 25 65 235 -40 0 13 52 0 48 42 - 0 43 24 1 46 22 - 19 0 0 0 31 40 21 50 34 64 236 -41 0 14 16 0 49 5 - 0 43 0 1 46 46 - 18 0 0 0 32 21 21 50 43 63 237 -42 0 14 57 0 49 46 - 0 42 19 1 47 27 - 17 0 0 0 33 19 21 50 51 62 238 -43 0 15 55 0 50 45 - 0 41 21 1 48 26 - 16 0 0 0 34 35 21 51 0 61 239 -44 0 17 11 0 52 1 - 0 40 5 1 49 42 - 15 0 0 0 36 9 21 51 8 61 240 -45 0 18 45 0 53 35 - 0 38 32 1 51 16 - 14 0 0 0 38 0 21 51 17 60 241 -47 0 20 35 0 55 26 - 0 36 42 1 53 8 - 13 0 0 0 40 8 21 51 25 59 242 -48 0 22 44 0 57 34 - 0 34 34 1 55 17 - 12 0 0 0 42 34 21 51 33 58 242 -49 0 25 9 1 0 0 - 0 32 9 1 57 43 - 11 0 0 0 45 17 21 51 41 57 243 -50 0 27 52 1 2 43 - 0 29 27 2 0 27 - 10 0 0 0 48 17 21 51 49 56 244 -51 0 30 52 1 5 44 - 0 26 28 2 3 28 - 9 0 0 0 51 34 21 51 57 55 244 -52 0 34 9 1 9 1 - 0 23 12 2 6 46 - 8 0 0 0 55 8 21 52 5 54 245 -53 0 37 43 1 12 36 - 0 19 39 2 10 22 - 7 0 0 0 59 0 21 52 13 53 245 -54 0 41 34 1 16 27 - 0 15 49 2 14 14 - 6 0 0 1 3 8 21 52 20 52 246 -55 0 45 41 1 20 35 - 0 11 42 2 18 23 - 5 0 0 1 7 33 21 52 28 51 246 -56 0 50 6 1 25 1 - 0 7 18 2 22 50 - 4 0 0 1 12 14 21 52 35 50 247 -57 0 54 47 1 29 43 - 0 2 38 2 27 33 - 3 0 0 1 17 13 21 52 43 49 247 -58 0 59 45 1 34 41 0 2 19 2 32 33 - 2 0 0 1 22 27 21 52 50 48 248 -59 1 5 0 1 39 56 0 7 32 2 37 49 - 1 0 0 1 27 58 21 52 57 47 248 -60 1 10 30 1 45 28 0 13 1 2 43 22 0 0 0 1 33 46 21 53 4 46 248 -61 1 16 17 1 51 16 0 18 47 2 49 11 1 0 0 1 39 49 21 53 11 45 249 -62 1 22 20 1 57 20 0 24 49 2 55 16 2 0 0 1 46 9 21 53 18 44 249 -63 1 28 39 2 3 39 0 31 6 3 1 38 3 0 0 1 52 44 21 53 24 43 249 -64 1 35 14 2 10 15 0 37 40 3 8 15 4 0 0 1 59 35 21 53 31 42 250 -65 1 42 5 2 17 7 0 44 29 3 15 8 5 0 0 2 6 42 21 53 37 41 250 -66 1 49 11 2 24 14 0 51 34 3 22 17 6 0 0 2 14 4 21 53 43 40 250 -67 1 56 33 2 31 37 0 58 54 3 29 41 7 0 0 2 21 42 21 53 50 39 250 -68 2 4 10 2 39 15 1 6 29 3 37 21 8 0 0 2 29 34 21 53 56 38 250 -69 2 12 2 2 47 8 1 14 19 3 45 16 9 0 0 2 37 42 21 54 1 37 251 -70 2 20 9 2 55 16 1 22 25 3 53 26 10 0 0 2 46 4 21 54 7 36 251 -71 2 28 31 3 3 39 1 30 45 4 1 50 11 0 0 2 54 41 21 54 13 35 251 -72 2 37 7 3 12 17 1 39 19 4 10 30 12 0 0 3 3 33 21 54 18 34 251 -73 2 45 58 3 21 9 1 48 8 4 19 24 13 0 0 3 12 38 21 54 23 33 251 -74 2 55 3 3 30 15 1 57 12 4 28 32 14 0 0 3 21 58 21 54 29 32 252 -75 3 4 23 3 39 35 2 6 29 4 37 54 15 0 0 3 31 32 21 54 34 31 252 -76 3 13 56 3 49 9 2 16 0 4 47 30 16 0 0 3 41 19 21 54 39 30 252 -77 3 23 42 3 58 57 2 25 45 4 57 20 17 0 0 3 51 20 21 54 43 29 252 -79 3 33 43 4 8 59 2 35 43 5 7 23 18 0 0 4 1 34 21 54 48 28 252 -80 3 43 56 4 19 13 2 45 55 5 17 40 19 0 0 4 12 1 21 54 52 27 252 -81 3 54 22 4 29 41 2 56 19 5 28 9 20 0 0 4 22 41 21 54 57 26 253 -82 4 5 2 4 40 21 3 6 56 5 38 52 21 0 0 4 33 33 21 55 1 25 253 -83 4 15 53 4 51 14 3 17 46 5 49 47 22 0 0 4 44 38 21 55 5 24 253 -84 4 26 57 5 2 20 3 28 48 6 0 54 23 0 0 4 55 55 21 55 8 23 253 -85 4 38 14 5 13 37 3 40 2 6 12 13 24 0 0 5 7 23 21 55 12 22 253 -86 4 49 42 5 25 6 3 51 28 6 23 45 25 0 0 5 19 3 21 55 16 21 253 -86 5 1 21 5 36 47 4 3 6 6 35 28 26 0 0 5 30 55 21 55 19 20 253 -87 5 13 12 5 48 39 4 14 55 6 47 22 27 0 0 5 42 58 21 55 22 19 253 -88 5 25 15 6 0 43 4 26 55 6 59 27 28 0 0 5 55 11 21 55 25 18 254 -88 5 37 28 6 12 57 4 39 6 7 11 43 29 0 0 6 7 36 21 55 28 17 254 -88 5 49 51 6 25 22 4 51 28 7 24 10 30 0 0 6 20 10 21 55 31 16 254 -87 6 2 25 6 37 57 5 4 0 7 36 47 31 0 0 6 32 55 21 55 33 15 254 -87 6 15 9 6 50 42 5 16 42 7 49 34 32 0 0 6 45 49 21 55 35 14 254 -86 6 28 3 7 3 37 5 29 34 8 2 31 33 0 0 6 58 53 21 55 38 13 254 -85 6 41 6 7 16 41 5 42 35 8 15 37 34 0 0 7 12 6 21 55 40 12 254 -84 6 54 18 7 29 54 5 55 46 8 28 52 35 0 0 7 25 27 21 55 41 11 255 -83 7 7 39 7 43 17 6 9 5 8 42 17 36 0 0 7 38 58 21 55 43 10 255 -82 7 21 9 7 56 48 6 22 34 8 55 49 37 0 0 7 52 37 21 55 45 9 255 -81 7 34 48 8 10 27 6 36 10 9 9 30 38 0 0 8 6 23 21 55 46 8 255 -80 7 48 34 8 24 14 6 49 55 9 23 19 39 0 0 8 20 18 21 55 47 7 255 -79 8 2 28 8 38 9 7 3 47 9 37 16 40 0 0 8 34 20 21 55 48 6 255 -78 8 16 29 8 52 12 7 17 47 9 51 20 41 0 0 8 48 29 21 55 49 5 255 -77 8 30 38 9 6 21 7 31 54 10 5 31 42 0 0 9 2 45 21 55 50 3 256 -76 8 44 54 9 20 38 7 46 8 10 19 49 43 0 0 9 17 7 21 55 50 2 256 -75 8 59 15 9 35 1 8 0 28 10 34 14 44 0 0 9 31 36 21 55 50 1 256 -74 9 13 44 9 49 30 8 14 55 10 48 44 45 0 0 9 46 10 21 55 51 0 256 -73 9 28 18 10 4 5 8 29 28 11 3 20 Uncertainty in time = +/- 8 secs Prediction of 2012 Sep 27.0 Data for the target star ------------------------ * name: UCAC2 27000649 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 19 58 30.2578 DE: -13 40 15.359 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .097, .097 ) * V mag [mag]: 11.8 * B mag [mag]: 0.0 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (67) Asia approx. diameter [km]: 62 approx. diameter ["]: .059 distance from Earth [AU]: 1.44200 * orbital information: orbit source: Preston date of fit: 2012 Sep 26 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1304 number of rejected observations: 135 time covered by the observations: 1907 Nov 02 - 2012 Sep 16 1 sigma uncertainty ellipse (major, minor, PA): 0.011, 0.008, 79° remarks: * orbital elements for (67) Asia : Mean anomaly = 12.62223532 deg Arg. of pericenter = 106.22951844 deg Long. of node = 202.66389046 deg Inclination = 6.02765586 deg Eccentricity = 0.18409776 Semimajor axis = 2.42146591 AU Perihelion dist = 1.97567945 AU Mag: H = 8.28, G = 0.15 Epoch of elements : MJD 56203.90800000 TDT (2012 Oct 03.908) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 3 67 Asia 21h 47.6m UT 11.8 19 58 30.258-13 40 15.36UCAC2 27000649 0.0 11.8 62 5.0 1.442 2.917 -3.63 -40.2684 -13.669 -149.70 -4.39 21.7931 0.02535 0.25729 6.96856 -0.59557 0.00491 0.00079 2000 11.6000232012 930.00000106.229518202.663890 6.0276560.18409776 2.4214659 1.9756795 8.3 5.00.15 RATE 2.6156910 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.098 0.097 90 2.65 0.098 0 0-2 1 056197.0020121003_000649 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Sep 26, 21:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org