IOTA/IOTA-ES occultation update for (5144) Achates / TYC 0598-00772-1 event on 2012 Nov 14, 22:31 UT Visible from SE Canada, NE USA Summary ------- On 2012 Nov 14 UT, the 90 km diameter asteroid (5144) Achates will occult a 11.4 mag star in the constellation Pisces for observers along a path across SE Canada, NE USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.4 mag to 15.8 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: 52 * date and approx. time of event: 2012 Nov 14, 22:22 - 2012 Nov 14, 22:36 UT * geocentric midpoint of event [JD]: 2456246.438925 * magnitude of target star: 11.4 * magnitude drop [mag]: 4.4 * estimated maximum duration [s]: 12.9 * Moon: 2 % sunlit, 120° distance * Sun: 135° distance * rough path description: SE Canada, NE USA The occultation path -------------------- * approximate projected width [km]: 136 * 1 sigma uncertainty interval [path widths]: +/- 1.24 * 1 sigma uncertainty interval [seconds]: +/- 18.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .045 +/- .040) * 1 sigma uncertainty ellipse (major, minor, PA): ( .046", .039", 67° ) * approx speed of asteroid's shadow [km/s]: 6.9889 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0598-00772-1 by 5144 Achates on 2012 Nov 14 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude 107 36 26 86 8 31 22 22 20 8 314 -19 78 32 56 86 51 23 127 25 59 84 18 35 26 37 8 85 23 25 ... .. .. .. .. .. 41 49 37 87 48 2 22 22 35 12 248 -20 19 33 46 86 48 0 87 21 36 88 3 4 3 5 49 84 1 55 144 14 29 83 3 33 - 5 53 15 86 17 35 22 22 50 15 200 -22 - 7 57 47 85 5 10 - 0 45 32 87 35 20 - 9 40 32 82 24 3 140 55 56 88 8 55 - 20 54 44 84 17 8 22 23 6 17 185 -23 - 19 38 25 83 12 24 - 22 43 2 85 25 58 - 17 30 29 80 45 45 - 40 46 23 88 38 52 - 28 0 22 82 22 34 22 23 21 19 178 -23 - 26 8 56 81 24 42 - 30 25 46 83 23 4 - 22 53 33 79 10 50 - 42 32 28 86 5 11 - 32 23 26 80 35 58 22 23 36 20 174 -24 - 30 28 52 79 43 24 - 34 43 47 81 30 20 - 26 54 51 77 39 59 - 43 59 26 83 52 57 - 35 31 55 78 56 21 22 23 52 22 170 -24 - 33 41 46 78 7 56 - 37 41 28 79 46 4 - 30 6 7 76 13 5 - 45 17 7 81 54 49 - 37 59 31 77 22 36 22 24 7 23 167 -25 - 36 15 26 76 37 31 - 39 58 34 78 8 39 - 32 44 28 74 49 47 - 46 28 30 80 6 52 - 40 1 57 75 53 45 22 24 22 25 165 -25 - 38 23 55 75 11 27 - 41 51 53 76 36 49 - 34 59 55 73 29 42 - 47 35 11 78 26 43 - 41 47 37 74 29 6 22 24 38 26 163 -25 - 40 15 8 73 49 6 - 43 29 48 75 9 41 - 36 58 43 72 12 31 - 48 38 14 76 52 45 - 43 21 26 73 8 2 22 24 53 27 161 -25 - 41 53 55 72 30 2 - 44 57 1 73 46 30 - 38 44 59 70 57 54 - 49 38 21 75 23 52 - 44 46 30 71 50 4 22 25 8 28 160 -25 - 43 23 22 71 13 48 - 46 16 27 72 26 44 - 40 21 33 69 45 37 - 50 36 4 73 59 13 - 46 4 52 70 34 52 22 25 24 29 158 -25 - 44 45 38 70 0 7 - 47 29 58 71 9 56 - 41 50 26 68 35 24 - 51 31 47 72 38 11 - 47 17 58 69 22 4 22 25 39 30 156 -25 - 46 2 12 68 48 40 - 48 38 51 69 55 44 - 43 13 6 67 27 4 - 52 25 47 71 20 17 - 48 26 50 68 11 26 22 25 55 31 155 -25 - 47 14 9 67 39 15 - 49 44 2 68 43 52 - 44 30 41 66 20 27 - 53 18 21 70 5 7 - 49 32 15 67 2 45 22 26 10 32 153 -25 - 48 22 20 66 31 39 - 50 46 11 67 34 3 - 45 44 1 65 15 23 - 54 9 40 68 52 22 - 50 34 48 65 55 49 22 26 25 33 152 -25 - 49 27 23 65 25 42 - 51 45 51 66 26 5 - 46 53 48 64 11 45 - 54 59 54 67 41 45 - 51 34 57 64 50 28 22 26 41 34 151 -25 - 50 29 46 64 21 15 - 52 43 24 65 19 49 - 48 0 32 63 9 26 - 55 49 11 66 33 4 - 52 33 3 63 46 34 22 26 56 34 149 -24 - 51 29 54 63 18 11 - 53 39 11 64 15 4 - 49 4 41 62 8 19 - 56 37 40 65 26 7 - 53 29 25 62 44 0 22 27 11 35 148 -24 - 52 28 7 62 16 22 - 54 33 26 63 11 43 - 50 6 35 61 8 19 - 57 25 25 64 20 45 - 54 24 17 61 42 39 22 27 27 36 146 -24 - 53 24 40 61 15 44 - 55 26 24 62 9 38 - 51 6 33 60 9 21 - 58 12 33 63 16 49 - 55 17 50 60 42 25 22 27 42 36 145 -24 - 54 19 46 60 16 9 - 56 18 14 61 8 44 - 52 4 49 59 11 20 - 58 59 8 62 14 11 - 56 10 17 59 43 13 22 27 57 37 144 -23 - 55 13 38 59 17 34 - 57 9 5 60 8 54 - 53 1 37 58 14 13 - 59 45 15 61 12 46 - 57 1 45 58 44 59 22 28 13 37 142 -23 - 56 6 24 58 19 54 - 57 59 6 59 10 5 - 53 57 6 57 17 55 - 60 30 57 60 12 26 - 57 52 22 57 47 38 22 28 28 38 141 -22 - 56 58 14 57 23 6 - 58 48 23 58 12 11 - 54 51 27 56 22 24 - 61 16 18 59 13 9 - 58 42 14 56 51 6 22 28 43 38 139 -22 - 57 49 13 56 27 5 - 59 37 2 57 15 9 - 55 44 47 55 27 36 - 62 1 22 58 14 48 - 59 31 29 55 55 21 22 28 59 39 138 -22 - 58 39 29 55 31 48 - 60 25 9 56 18 55 - 56 37 14 54 33 29 - 62 46 11 57 17 19 - 60 20 10 55 0 19 22 29 14 39 137 -21 - 59 29 8 54 37 13 - 61 12 47 55 23 25 - 57 28 55 53 39 59 - 63 30 48 56 20 39 - 61 8 22 54 5 58 22 29 30 40 135 -21 - 60 18 13 53 43 17 - 62 0 2 54 28 37 - 58 19 55 52 47 5 - 64 15 16 55 24 45 - 61 56 10 53 12 13 22 29 45 40 134 -20 - 61 6 51 52 49 57 - 62 46 56 53 34 28 - 59 10 19 51 54 44 - 64 59 36 54 29 32 - 62 43 38 52 19 4 22 30 0 40 133 -20 - 61 55 5 51 57 11 - 63 33 35 52 40 55 - 60 0 12 51 2 54 - 65 43 52 53 34 59 - 63 30 49 51 26 27 22 30 16 40 131 -19 - 62 42 59 51 4 57 - 64 20 0 51 47 56 - 60 49 38 50 11 33 - 66 28 6 52 41 3 - 64 17 47 50 34 21 22 30 31 41 130 -19 - 63 30 36 50 13 12 - 65 6 14 50 55 29 - 61 38 42 49 20 40 - 67 12 20 51 47 41 - 65 4 34 49 42 44 22 30 46 41 128 -18 - 64 18 0 49 21 55 - 65 52 22 50 3 31 - 62 27 27 48 30 12 - 67 56 35 50 54 50 - 65 51 14 48 51 33 22 31 2 41 127 -17 - 65 5 14 48 31 4 - 66 38 25 49 12 0 - 63 15 56 47 40 8 - 68 40 55 50 2 30 - 66 37 49 48 0 47 22 31 17 41 126 -17 - 65 52 21 47 40 37 - 67 24 26 48 20 55 - 64 4 12 46 50 26 - 69 25 20 49 10 37 - 67 24 22 47 10 25 22 31 32 41 124 -16 - 66 39 24 46 50 33 - 68 10 28 47 30 15 - 64 52 20 46 1 6 - 70 9 54 48 19 9 - 68 10 56 46 20 24 22 31 48 41 123 -16 - 67 26 25 46 0 49 - 68 56 32 46 39 56 - 65 40 21 45 12 4 - 70 54 37 47 28 6 - 68 57 33 45 30 43 22 32 3 41 122 -15 - 68 13 26 45 11 25 - 69 42 42 45 49 58 - 66 28 18 44 23 21 - 71 39 32 46 37 25 - 69 44 15 44 41 21 22 32 18 41 120 -14 - 69 0 32 44 22 20 - 70 29 0 45 0 20 - 67 16 14 43 34 55 - 72 24 42 45 47 4 - 70 31 5 43 52 17 22 32 34 41 119 -14 - 69 47 43 43 33 31 - 71 15 27 44 10 59 - 68 4 12 42 46 44 - 73 10 7 44 57 3 - 71 18 6 43 3 28 22 32 49 41 118 -13 - 70 35 3 42 44 57 - 72 2 8 43 21 54 - 68 52 15 41 58 48 - 73 55 51 44 7 19 - 72 5 19 42 14 54 22 33 5 41 116 -12 - 71 22 33 41 56 38 - 72 49 2 42 33 5 - 69 40 24 41 11 5 - 74 41 55 43 17 51 - 72 52 47 41 26 33 22 33 20 41 115 -12 - 72 10 17 41 8 32 - 73 36 14 41 44 29 - 70 28 43 40 23 34 - 75 28 22 42 28 37 - 73 40 34 40 38 24 22 33 35 41 114 -11 - 72 58 17 40 20 37 - 74 23 46 40 56 6 - 71 17 14 39 36 14 - 76 15 14 41 39 37 - 74 28 40 39 50 26 22 33 51 41 112 -10 - 73 46 36 39 32 53 - 75 11 40 40 7 54 - 72 5 59 38 49 4 - 77 2 33 40 50 48 - 75 17 10 39 2 37 22 34 6 40 111 -9 - 74 35 15 38 45 18 - 75 59 59 39 19 51 - 72 55 1 38 2 2 - 77 50 22 40 2 10 - 76 6 5 38 14 57 22 34 21 40 110 -9 - 75 24 19 37 57 52 - 76 48 45 38 31 57 - 73 44 24 37 15 8 - 78 38 44 39 13 41 - 76 55 28 37 27 24 22 34 37 40 109 -8 - 76 13 49 37 10 32 - 77 38 1 37 44 11 - 74 34 9 36 28 20 - 79 27 42 38 25 20 - 77 45 23 36 39 58 22 34 52 39 107 -7 - 77 3 49 36 23 19 - 78 27 51 36 56 31 - 75 24 20 35 41 38 - 80 17 19 37 37 5 - 78 35 53 35 52 35 22 35 7 39 106 -6 - 77 54 21 35 36 9 - 79 18 18 36 8 55 - 76 14 59 34 55 0 - 81 7 38 36 48 56 - 79 27 0 35 5 17 22 35 23 39 105 -5 - 78 45 30 34 49 4 - 80 9 24 35 21 23 - 77 6 10 34 8 26 - 81 58 42 36 0 50 - 80 18 49 34 18 0 22 35 38 38 104 -4 - 79 37 18 34 2 0 - 81 1 15 34 33 54 - 77 57 56 33 21 53 - 82 50 37 35 12 46 - 81 11 24 33 30 45 22 35 53 38 102 -3 - 80 29 49 33 14 58 - 81 53 53 33 46 25 - 78 50 21 32 35 21 - 83 43 25 34 24 43 - 82 4 48 32 43 29 22 36 9 37 101 -2 - 81 23 8 32 27 55 - 82 47 23 32 58 56 - 79 43 28 31 48 49 - 84 37 12 33 36 39 - 82 59 6 31 56 11 22 36 24 37 100 -2 - 82 17 18 31 40 50 - 83 41 49 32 11 24 - 80 37 22 31 2 15 - 85 32 3 32 48 33 - 83 54 24 31 8 49 22 36 40 36 99 -1 - 83 12 26 30 53 42 - 84 37 18 31 23 49 - 81 32 6 30 15 39 - 86 28 4 32 0 22 Uncertainty in time = +/- 19 secs Prediction of 2012 Oct 26.0 Data for the target star ------------------------ * name: TYC 0598-00772-1 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 00 15 43.4394 DE: +11 04 22.969 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .025 ) * V mag [mag]: 11.4 * B mag [mag]: 12.2 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5144) Achates approx. diameter [km]: 90 approx. diameter ["]: .032 distance from Earth [AU]: 3.91200 * orbital information: orbit source: Preston date of fit: 2012 Oct 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 927 number of rejected observations: 16 time covered by the observations: 1949 May 04 - 2012 Oct 22 1 sigma uncertainty ellipse (major, minor, PA): 0.039, 0.031, 58° remarks: * orbital elements for (5144) Achates : Mean anomaly = 52.90580069 deg Arg. of pericenter = 331.50760457 deg Long. of node = 322.84750377 deg Inclination = 8.90162301 deg Eccentricity = 0.27202024 Semimajor axis = 5.20778505 AU Perihelion dist = 3.79116212 AU Mag: H = 9.06, G = 0.15 Epoch of elements : MJD 56245.93900000 TDT (2012 Nov 14.939) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 14 5144 Achates 22h 32.1m UT 11.4 0 15 43.439 11 4 22.97TYC 0598-00772-1 12.2 15.8 90 12.9 3.912 -0.476 -5.42 -28.5068 11.075 -161.86 -18.51 22.5342 -0.45705 0.59343 -3.12081 -2.41281 0.00422 0.00114 2000 52.413265201211 9.00000331.507605322.847504 8.9016230.27202024 5.2077851 3.7911621 8.9 5.00.15 RATE 0.8293250 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.046 0.039 67 2.24 0.039 0 0 4-1 056226.0020121114_0772-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 22:24 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org