IOTA/IOTA-ES occultation update for (914) Palisana / 2UCAC 45297926 event on 2012 Aug 22, 07:43 UT Visible from SE Canada, USA, Mexico Summary ------- On 2012 Aug 22 UT, the 99 km diameter asteroid (914) Palisana will occult a 12.6 mag star in the constellation Perseus for observers along a path across SE Canada, USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.2 mag to 13.4 mag (the magnitude of the asteroid) for at most 6.6 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: 60 * date and approx. time of event: 2012 Aug 22, 07:36 - 2012 Aug 22, 07:43 UT * geocentric midpoint of event [JD]: 2456161.8220375 * magnitude of target star: 12.6 * magnitude drop [mag]: 1.2 * estimated maximum duration [s]: 6.6 * Moon: 25 % sunlit, 144° distance * Sun: 87° distance * rough path description: SE Canada, USA, Mexico The occultation path -------------------- * approximate projected width [km]: 103 * 1 sigma uncertainty interval [path widths]: +/- 1.02 * 1 sigma uncertainty interval [seconds]: +/- 5.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .066 +/- .065) * 1 sigma uncertainty ellipse (major, minor, PA): ( .066", .065", 91° ) * approx speed of asteroid's shadow [km/s]: 14.9672 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 45297926 by 914 Palisana on 2012 Aug 22 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 -120 0 0 1 8 38 7 36 57 0 51 -76 .. .. .. 1 44 55 .. .. .. 2 59 27 -119 0 0 1 57 38 7 36 57 2 51 -75 1 21 18 2 34 7 0 7 39 3 49 5 -118 0 0 2 47 17 7 36 58 3 51 -75 2 10 45 3 23 58 0 56 43 4 39 20 -117 0 0 3 37 33 7 36 58 4 51 -74 3 0 50 4 14 26 1 46 24 5 30 12 -116 0 0 4 28 24 7 36 59 6 51 -74 3 51 29 5 5 28 2 36 41 6 21 39 -115 0 0 5 19 49 7 37 0 7 52 -73 4 42 43 5 57 4 3 27 32 7 13 38 -114 0 0 6 11 45 7 37 2 8 52 -72 5 34 28 6 49 12 4 18 56 8 6 9 -113 0 0 7 4 11 7 37 3 9 52 -71 6 26 44 7 41 48 5 10 51 8 59 7 -112 0 0 7 57 5 7 37 5 11 52 -70 7 19 27 8 34 52 6 3 14 9 52 33 -111 0 0 8 50 24 7 37 7 12 52 -69 8 12 37 9 28 21 6 56 3 10 46 22 -110 0 0 9 44 5 7 37 9 13 52 -68 9 6 9 10 22 13 7 49 17 11 40 33 -109 0 0 10 38 8 7 37 12 15 52 -67 10 0 3 11 16 24 8 42 52 12 35 4 -108 0 0 11 32 28 7 37 15 16 53 -66 10 54 15 12 10 53 9 36 48 13 29 50 -107 0 0 12 27 4 7 37 18 17 53 -65 11 48 43 13 5 37 10 31 0 14 24 51 -106 0 0 13 21 53 7 37 21 19 53 -64 12 43 24 14 0 33 11 25 26 15 20 3 -105 0 0 14 16 51 7 37 24 20 53 -63 13 38 15 14 55 39 12 20 4 16 15 22 -104 0 0 15 11 57 7 37 28 21 54 -62 14 33 15 15 50 50 13 14 51 17 10 47 -103 0 0 16 7 7 7 37 32 23 54 -60 15 28 19 16 46 6 14 9 43 18 6 15 -102 0 0 17 2 18 7 37 36 24 55 -59 16 23 25 17 41 22 15 4 40 19 1 41 -101 0 0 17 57 27 7 37 40 25 55 -58 17 18 30 18 36 36 15 59 36 19 57 4 -100 0 0 18 52 32 7 37 45 27 55 -57 18 13 31 19 31 44 16 54 30 20 52 19 - 99 0 0 19 47 29 7 37 50 28 56 -55 19 8 26 20 26 44 17 49 18 21 47 25 - 98 0 0 20 42 16 7 37 55 29 56 -54 20 3 10 21 21 33 18 43 58 22 42 19 - 97 0 0 21 36 49 7 38 0 31 57 -53 20 57 42 22 16 7 19 38 27 23 36 56 - 96 0 0 22 31 5 7 38 5 32 57 -52 21 51 58 23 10 25 20 32 41 24 31 15 - 95 0 0 23 25 3 7 38 11 33 58 -51 22 45 55 24 4 22 21 26 39 25 25 12 - 94 0 0 24 18 38 7 38 16 34 58 -49 23 39 31 24 57 57 22 20 17 26 18 44 - 93 0 0 25 11 49 7 38 22 36 59 -48 24 32 44 25 51 6 23 13 32 27 11 50 - 92 0 0 26 4 33 7 38 28 37 60 -47 25 25 29 26 43 47 24 6 22 28 4 26 - 91 0 0 26 56 46 7 38 34 38 60 -46 26 17 46 27 35 58 24 58 45 28 56 30 - 90 0 0 27 48 28 7 38 40 39 61 -44 27 9 32 28 27 35 25 50 38 29 48 0 - 89 0 0 28 39 35 7 38 46 41 62 -43 28 0 43 29 18 38 26 41 58 30 38 53 - 88 0 0 29 30 6 7 38 52 42 63 -42 28 51 19 30 9 3 27 32 44 31 29 7 - 87 0 0 30 19 58 7 38 59 43 63 -41 29 41 17 30 58 49 28 22 53 32 18 40 - 86 0 0 31 9 9 7 39 5 44 64 -40 30 30 35 31 47 54 29 12 24 33 7 32 - 85 0 0 31 57 38 7 39 12 45 65 -38 31 19 11 32 36 16 30 1 14 33 55 39 - 84 0 0 32 45 24 7 39 18 46 66 -37 32 7 4 33 23 54 30 49 23 34 43 0 - 83 0 0 33 32 24 7 39 25 47 67 -36 32 54 13 34 10 46 31 36 48 35 29 34 - 82 0 0 34 18 38 7 39 32 49 68 -35 33 40 35 34 56 51 32 23 28 36 15 20 - 81 0 0 35 4 4 7 39 38 50 69 -34 34 26 11 35 42 7 33 9 22 37 0 17 - 80 0 0 35 48 41 7 39 45 51 70 -33 35 10 58 36 26 35 33 54 28 37 44 24 - 79 0 0 36 32 29 7 39 52 52 71 -32 35 54 56 37 10 12 34 38 47 38 27 40 - 78 0 0 37 15 27 7 39 58 53 72 -31 36 38 4 37 52 59 35 22 16 39 10 4 - 77 0 0 37 57 33 7 40 5 54 74 -29 37 20 21 38 34 54 36 4 55 39 51 36 - 76 0 0 38 38 48 7 40 12 55 75 -28 38 1 48 39 15 58 36 46 45 40 32 16 - 75 0 0 39 19 12 7 40 18 56 76 -27 38 42 23 39 56 10 37 27 43 41 12 3 - 74 0 0 39 58 43 7 40 25 56 77 -26 39 22 6 40 35 29 38 7 50 41 50 58 - 73 0 0 40 37 22 7 40 32 57 79 -25 40 0 58 41 13 56 38 47 5 42 28 59 - 72 0 0 41 15 10 7 40 38 58 80 -24 40 38 57 41 51 31 39 25 29 43 6 8 - 71 0 0 41 52 4 7 40 45 59 82 -23 41 16 4 42 28 13 40 3 2 43 42 23 - 70 0 0 42 28 7 7 40 51 60 83 -22 41 52 20 43 4 3 40 39 43 44 17 47 - 69 0 0 43 3 18 7 40 58 61 85 -21 42 27 44 43 39 1 41 15 32 44 52 18 - 68 0 0 43 37 38 7 41 4 61 86 -21 43 2 16 44 13 8 41 50 30 45 25 58 - 67 0 0 44 11 6 7 41 10 62 88 -20 43 35 57 44 46 23 42 24 38 45 58 46 - 66 0 0 44 43 44 7 41 17 63 90 -19 44 8 48 45 18 48 42 57 54 46 30 44 - 65 0 0 45 15 32 7 41 23 64 92 -18 44 40 49 45 50 22 43 30 21 47 1 51 - 64 0 0 45 46 29 7 41 29 64 94 -17 45 11 59 46 21 7 44 1 57 47 32 8 - 63 0 0 46 16 38 7 41 35 65 96 -16 45 42 21 46 51 2 44 32 45 48 1 37 - 62 0 0 46 45 58 7 41 41 66 98 -15 46 11 54 47 20 10 45 2 44 48 30 17 - 61 0 0 47 14 30 7 41 47 66 100 -14 46 40 39 47 48 29 45 31 54 48 58 10 - 60 0 0 47 42 15 7 41 53 67 102 -13 47 8 36 48 16 1 46 0 18 49 25 15 - 59 0 0 48 9 14 7 41 59 67 104 -13 47 35 47 48 42 47 46 27 54 49 51 35 - 58 0 0 48 35 26 7 42 5 68 106 -12 48 2 12 49 8 47 46 54 44 50 17 9 - 57 0 0 49 0 54 7 42 11 68 108 -11 48 27 52 49 34 2 47 20 48 50 41 58 - 56 0 0 49 25 37 7 42 16 69 111 -10 48 52 47 49 58 33 47 46 8 51 6 3 - 55 0 0 49 49 36 7 42 22 69 113 -9 49 16 59 50 22 20 48 10 43 51 29 26 - 54 0 0 50 12 52 7 42 28 70 116 -9 49 40 27 50 45 24 48 34 35 51 52 6 - 53 0 0 50 35 27 7 42 33 70 118 -8 50 3 13 51 7 47 48 57 44 52 14 4 - 52 0 0 50 57 19 7 42 39 71 121 -7 50 25 17 51 29 28 49 20 12 52 35 21 - 51 0 0 51 18 32 7 42 44 71 124 -6 50 46 40 51 50 29 49 41 58 52 55 59 - 50 0 0 51 39 4 7 42 49 71 126 -6 51 7 23 52 10 50 50 3 3 53 15 57 - 49 0 0 51 58 56 7 42 55 72 129 -5 51 27 27 52 30 32 50 23 28 53 35 16 - 48 0 0 52 18 11 7 43 0 72 132 -4 51 46 51 52 49 35 50 43 14 53 53 58 - 47 0 0 52 36 47 7 43 5 72 135 -4 52 5 38 53 8 1 51 2 22 54 12 2 - 46 0 0 52 54 46 7 43 10 72 138 -3 52 23 48 53 25 50 51 20 51 54 29 30 - 45 0 0 53 12 9 7 43 15 72 141 -2 52 41 20 53 43 3 51 38 44 54 46 23 - 44 0 0 53 28 56 7 43 20 73 143 -2 52 58 17 53 59 41 51 56 0 55 2 40 - 43 0 0 53 45 8 7 43 25 73 146 -1 53 14 38 54 15 43 52 12 40 55 18 23 - 42 0 0 54 0 45 7 43 30 73 149 0 53 30 24 54 31 11 52 28 45 55 33 33 Uncertainty in time = +/- 7 secs Prediction of 2012 Jul 8.0 Data for the target star ------------------------ * name: 2UCAC 45297926 * constellation : Perseus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 03 42 08.3152 DE: +38 43 28.957 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .065, .065 ) * V mag [mag]: 12.6 * B mag [mag]: 0.0 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (914) Palisana approx. diameter [km]: 99 approx. diameter ["]: .064 distance from Earth [AU]: 2.14500 * orbital information: orbit source: Preston date of fit: 2012 Jul 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 836 number of rejected observations: 45 time covered by the observations: 1931 Oct 13 - 2011 Aug 23 1 sigma uncertainty ellipse (major, minor, PA): 0.016, 0.010, 109° remarks: * orbital elements for (914) Palisana : Mean anomaly = 63.73258131 deg Arg. of pericenter = 48.82031748 deg Long. of node = 255.84808214 deg Inclination = 25.21854962 deg Eccentricity = 0.21257453 Semimajor axis = 2.45872493 AU Perihelion dist = 1.93606265 AU Mag: H = 9.04, G = 0.15 Epoch of elements : MJD 56161.32200000 TDT (2012 Aug 22.322) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Aug 22 914 Palisana 7h 43.7m UT 12.6 3 42 8.315 38 43 28.962UCAC 45297926 0.0 13.4 99 6.6 2.145 2.853 9.21 -31.4224 38.722 64.78 11.60 7.7289 -0.07891 0.27478 8.14391 2.24580 -0.00528 -0.00121 2000 63.3946172012 821.00000 48.820317255.848082 25.2185500.21257453 2.4587249 1.9360626 8.8 5.00.15 RATE 2.5564610 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.066 0.065 91 2.02 0.065 0 0 2-3 056116.0020120822_297926 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Jul 07, 23:41 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org