IOTA/IOTA-ES occultation update for (342) Endymion / TYC 0234-00547-1 event on 2012 Nov 22, 18:56 UT Visible from Japan, Russia Summary ------- On 2012 Nov 22 UT, the 56 km diameter asteroid (342) Endymion will occult a 9.6 mag star in the constellation Leo for observers along a path across Japan, Russia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.9 mag to 14.5 mag (the magnitude of the asteroid) for at most 4.0 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: 54 * date and approx. time of event: 2012 Nov 22, 18:49 - 2012 Nov 22, 18:57 UT * geocentric midpoint of event [JD]: 2456254.2893375 * magnitude of target star: 9.6 * magnitude drop [mag]: 4.9 * estimated maximum duration [s]: 4.0 * Moon: 72 % sunlit, 144° distance * Sun: 100° distance * rough path description: Japan, Russia The occultation path -------------------- * approximate projected width [km]: 60 * 1 sigma uncertainty interval [path widths]: +/- 1.16 * 1 sigma uncertainty interval [seconds]: +/- 4.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .037 +/- .052) * 1 sigma uncertainty ellipse (major, minor, PA): ( .052", .037", 1° ) * approx speed of asteroid's shadow [km/s]: 13.7191 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0234-00547-1 by 342 Endymion on 2012 Nov 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 ' " Longitude Longitude Longitude Longitude Latitude Latitude Latitude Latitude 170 0 0 20 59 47 18 57 11 69 230 0 20 38 49 21 20 48 19 50 24 22 9 49 169 0 0 21 46 18 18 57 1 70 226 -2 21 25 19 22 7 21 20 36 52 22 56 24 168 0 0 22 32 41 18 56 51 70 222 -3 22 11 41 22 53 44 21 23 12 23 42 49 167 0 0 23 18 53 18 56 41 70 219 -4 22 57 53 23 39 57 22 9 23 24 29 3 166 0 0 24 4 53 18 56 31 70 215 -5 23 43 52 24 25 56 22 55 22 25 15 3 165 0 0 24 50 37 18 56 21 70 211 -6 24 29 37 25 11 41 23 41 6 26 0 47 164 0 0 25 36 5 18 56 12 69 208 -7 25 15 5 25 57 8 24 26 35 26 46 13 163 0 0 26 21 14 18 56 2 69 204 -8 26 0 15 26 42 16 25 11 47 27 31 20 162 0 0 27 6 2 18 55 52 69 201 -10 26 45 4 27 27 4 25 56 38 28 16 5 161 0 0 27 50 28 18 55 43 68 197 -11 27 29 31 28 11 29 26 41 8 29 0 26 160 0 0 28 34 30 18 55 33 68 194 -12 28 13 35 28 55 29 27 25 15 29 44 23 159 0 0 29 18 6 18 55 24 67 191 -13 28 57 13 29 39 3 28 8 57 30 27 53 158 0 0 30 1 15 18 55 15 67 188 -14 29 40 24 30 22 10 28 52 13 31 10 55 157 0 0 30 43 55 18 55 6 66 185 -15 30 23 6 31 4 47 29 35 1 31 53 27 156 0 0 31 26 5 18 54 57 66 183 -16 31 5 18 31 46 55 30 17 19 32 35 28 155 0 0 32 7 43 18 54 48 65 180 -17 31 47 0 32 28 30 30 59 7 33 16 56 154 0 0 32 48 49 18 54 40 64 178 -18 32 28 8 33 9 33 31 40 23 33 57 51 153 0 0 33 29 21 18 54 31 64 175 -19 33 8 44 33 50 1 32 21 5 34 38 12 152 0 0 34 9 18 18 54 23 63 173 -20 33 48 44 34 29 55 33 1 14 35 17 57 151 0 0 34 48 39 18 54 14 62 171 -21 34 28 9 35 9 12 33 40 48 35 57 6 150 0 0 35 27 24 18 54 6 61 169 -22 35 6 58 35 47 53 34 19 45 36 35 37 149 0 0 36 5 31 18 53 58 60 167 -23 35 45 9 36 25 56 34 58 6 37 13 31 148 0 0 36 43 0 18 53 51 60 166 -24 36 22 43 37 3 21 35 35 49 37 50 46 147 0 0 37 19 51 18 53 43 59 164 -25 36 59 38 37 40 7 36 12 55 38 27 22 146 0 0 37 56 3 18 53 35 58 162 -26 37 35 54 38 16 14 36 49 21 39 3 18 145 0 0 38 31 35 18 53 28 57 161 -26 38 11 31 38 51 42 37 25 9 39 38 34 144 0 0 39 6 27 18 53 21 56 159 -27 38 46 28 39 26 29 38 0 17 40 13 10 143 0 0 39 40 39 18 53 14 56 158 -28 39 20 45 40 0 36 38 34 45 40 47 6 142 0 0 40 14 11 18 53 7 55 156 -29 39 54 22 40 34 3 39 8 33 41 20 21 141 0 0 40 47 2 18 53 0 54 155 -30 40 27 18 41 6 49 39 41 42 41 52 55 140 0 0 41 19 13 18 52 54 53 154 -31 40 59 34 41 38 55 40 14 9 42 24 48 139 0 0 41 50 43 18 52 47 52 152 -31 41 31 9 42 10 20 40 45 57 42 56 1 138 0 0 42 21 33 18 52 41 51 151 -32 42 2 4 42 41 4 41 17 4 43 26 32 137 0 0 42 51 42 18 52 35 51 150 -33 42 32 19 43 11 8 41 47 31 43 56 24 136 0 0 43 21 11 18 52 29 50 149 -34 43 1 53 43 40 32 42 17 17 44 25 35 135 0 0 43 50 0 18 52 23 49 148 -34 43 30 48 44 9 15 42 46 24 44 54 5 134 0 0 44 18 9 18 52 18 48 147 -35 43 59 2 44 37 19 43 14 51 45 21 56 133 0 0 44 45 38 18 52 12 47 145 -36 44 26 37 45 4 42 43 42 38 45 49 7 132 0 0 45 12 28 18 52 7 47 144 -36 44 53 32 45 31 27 44 9 46 46 15 39 131 0 0 45 38 39 18 52 2 46 143 -37 45 19 48 45 57 32 44 36 15 46 41 32 130 0 0 46 4 11 18 51 56 45 142 -38 45 45 26 46 22 59 45 2 5 47 6 46 129 0 0 46 29 5 18 51 51 44 141 -38 46 10 25 46 47 48 45 27 16 47 31 22 128 0 0 46 53 21 18 51 47 44 140 -39 46 34 46 47 11 58 45 51 50 47 55 20 127 0 0 47 17 0 18 51 42 43 139 -39 46 58 30 47 35 31 46 15 45 48 18 40 126 0 0 47 40 1 18 51 37 42 138 -40 47 21 37 47 58 27 46 39 4 48 41 24 125 0 0 48 2 25 18 51 33 41 137 -41 47 44 6 48 20 47 47 1 46 49 3 31 124 0 0 48 24 14 18 51 28 41 136 -41 48 6 0 48 42 30 47 23 51 49 25 2 123 0 0 48 45 26 18 51 24 40 135 -42 48 27 17 49 3 37 47 45 20 49 45 58 122 0 0 49 6 3 18 51 20 39 134 -42 48 48 0 49 24 9 48 6 14 50 6 18 121 0 0 49 26 6 18 51 16 39 133 -43 49 8 7 49 44 7 48 26 32 50 26 4 120 0 0 49 45 34 18 51 12 38 132 -43 49 27 40 50 3 30 48 46 16 50 45 15 119 0 0 50 4 27 18 51 8 37 132 -44 49 46 38 50 22 19 49 5 26 51 3 53 118 0 0 50 22 48 18 51 4 36 131 -44 50 5 3 50 40 35 49 24 2 51 21 58 117 0 0 50 40 35 18 51 1 36 130 -45 50 22 56 50 58 17 49 42 5 51 39 30 116 0 0 50 57 50 18 50 57 35 129 -45 50 40 15 51 15 28 49 59 34 51 56 29 115 0 0 51 14 33 18 50 54 34 128 -45 50 57 2 51 32 6 50 16 32 52 12 57 114 0 0 51 30 44 18 50 50 34 127 -46 51 13 18 51 48 13 50 32 57 52 28 54 113 0 0 51 46 24 18 50 47 33 126 -46 51 29 2 52 3 49 50 48 51 52 44 20 112 0 0 52 1 34 18 50 44 32 125 -47 51 44 15 52 18 54 51 4 14 52 59 15 111 0 0 52 16 13 18 50 41 32 124 -47 51 58 58 52 33 29 51 19 6 53 13 41 110 0 0 52 30 22 18 50 38 31 123 -47 52 13 11 52 47 34 51 33 29 53 27 37 109 0 0 52 44 1 18 50 35 30 122 -48 52 26 55 53 1 10 51 47 21 53 41 3 108 0 0 52 57 12 18 50 32 30 122 -48 52 40 9 53 14 17 52 0 44 53 54 1 107 0 0 53 9 54 18 50 30 29 121 -49 52 52 55 53 26 55 52 13 37 54 6 31 106 0 0 53 22 7 18 50 27 29 120 -49 53 5 12 53 39 5 52 26 3 54 18 33 105 0 0 53 33 53 18 50 24 28 119 -49 53 17 1 53 50 47 52 38 0 54 30 8 104 0 0 53 45 12 18 50 22 27 118 -49 53 28 23 54 2 2 52 49 29 54 41 15 103 0 0 53 56 3 18 50 19 27 117 -50 53 39 17 54 12 50 53 0 30 54 51 55 102 0 0 54 6 27 18 50 17 26 116 -50 53 49 44 54 23 12 53 11 5 55 2 9 101 0 0 54 16 25 18 50 15 26 115 -50 53 59 45 54 33 7 53 21 12 55 11 57 100 0 0 54 25 57 18 50 12 25 115 -51 54 9 20 54 42 35 53 30 53 55 21 20 99 0 0 54 35 2 18 50 10 24 114 -51 54 18 28 54 51 39 53 40 8 55 30 17 98 0 0 54 43 43 18 50 8 24 113 -51 54 27 11 55 0 16 53 48 57 55 38 48 97 0 0 54 51 58 18 50 6 23 112 -51 54 35 29 55 8 29 53 57 20 55 46 55 96 0 0 54 59 48 18 50 4 23 111 -52 54 43 21 55 16 17 54 5 18 55 54 37 95 0 0 55 7 13 18 50 2 22 110 -52 54 50 49 55 23 40 54 12 51 56 1 55 94 0 0 55 14 14 18 50 0 21 109 -52 54 57 52 55 30 39 54 19 59 56 8 49 93 0 0 55 20 51 18 49 58 21 109 -52 55 4 31 55 37 13 54 26 42 56 15 19 92 0 0 55 27 4 18 49 57 20 108 -52 55 10 45 55 43 24 54 33 1 56 21 25 91 0 0 55 32 53 18 49 55 20 107 -53 55 16 36 55 49 11 54 38 56 56 27 8 90 0 0 55 38 18 18 49 53 19 106 -53 55 22 3 55 54 35 54 44 27 56 32 28 89 0 0 55 43 20 18 49 52 19 105 -53 55 27 6 55 59 36 54 49 34 56 37 25 88 0 0 55 47 59 18 49 50 18 104 -53 55 31 47 56 4 13 54 54 17 56 41 59 87 0 0 55 52 15 18 49 49 17 103 -53 55 36 3 56 8 27 54 58 37 56 46 11 86 0 0 55 56 7 18 49 47 17 103 -53 55 39 57 56 12 19 55 2 33 56 49 59 85 0 0 55 59 37 18 49 46 16 102 -53 55 43 28 56 15 48 55 6 7 56 53 26 84 0 0 56 2 45 18 49 44 16 101 -54 55 46 37 56 18 54 55 9 17 56 56 30 83 0 0 56 5 30 18 49 43 15 100 -54 55 49 22 56 21 38 55 12 5 56 59 12 82 0 0 56 7 52 18 49 42 15 99 -54 55 51 45 56 24 0 55 14 30 57 1 32 81 0 0 56 9 52 18 49 41 14 98 -54 55 53 46 56 25 59 55 16 32 57 3 31 80 0 0 56 11 30 18 49 39 13 97 -54 55 55 24 56 27 37 55 18 11 57 5 7 79 0 0 56 12 45 18 49 38 13 97 -54 55 56 40 56 28 52 55 19 28 57 6 21 78 0 0 56 13 39 18 49 37 12 96 -54 55 57 34 56 29 45 55 20 22 57 7 14 77 0 0 56 14 10 18 49 36 12 95 -54 55 58 6 56 30 17 55 20 54 57 7 45 76 0 0 56 14 20 18 49 35 11 94 -54 55 58 15 56 30 26 55 21 3 57 7 55 75 0 0 56 14 7 18 49 34 11 93 -54 55 58 2 56 30 13 55 20 50 57 7 42 74 0 0 56 13 32 18 49 34 10 92 -54 55 57 27 56 29 39 55 20 14 57 7 8 73 0 0 56 12 35 18 49 33 10 92 -54 55 56 30 56 28 42 55 19 16 57 6 13 72 0 0 56 11 16 18 49 32 9 91 -54 55 55 10 56 27 24 55 17 55 57 4 56 71 0 0 56 9 35 18 49 31 8 90 -54 55 53 29 56 25 44 55 16 12 57 3 17 70 0 0 56 7 32 18 49 30 8 89 -54 55 51 25 56 23 41 55 14 7 57 1 16 69 0 0 56 5 7 18 49 30 7 88 -54 55 48 59 56 21 17 55 11 39 56 58 53 68 0 0 56 2 19 18 49 29 7 87 -54 55 46 10 56 18 30 55 8 48 56 56 9 67 0 0 55 59 10 18 49 29 6 87 -54 55 42 59 56 15 21 55 5 35 56 53 3 66 0 0 55 55 37 18 49 28 6 86 -54 55 39 26 56 11 50 55 1 59 56 49 34 65 0 0 55 51 42 18 49 28 5 85 -54 55 35 30 56 7 57 54 57 59 56 45 44 64 0 0 55 47 25 18 49 27 4 84 -54 55 31 11 56 3 41 54 53 37 56 41 31 63 0 0 55 42 45 18 49 27 4 83 -54 55 26 29 55 59 2 54 48 52 56 36 56 62 0 0 55 37 42 18 49 27 3 82 -54 55 21 24 55 54 1 54 43 44 56 31 58 61 0 0 55 32 16 18 49 26 3 82 -53 55 15 57 55 48 36 54 38 12 56 26 38 60 0 0 55 26 26 18 49 26 2 81 -53 55 10 5 55 42 49 54 32 16 56 20 55 59 0 0 55 20 14 18 49 26 2 80 -53 55 3 51 55 36 38 54 25 57 56 14 49 58 0 0 55 13 37 18 49 26 1 79 -53 54 57 13 55 30 4 54 19 14 56 8 20 57 0 0 55 6 38 18 49 26 0 78 -53 54 50 10 55 23 7 54 12 7 56 1 28 Uncertainty in time = +/- 5 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: TYC 0234-00547-1 * constellation : Leo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 09 22 37.7487 DE: +07 04 41.086 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .050 ) * V mag [mag]: 9.6 * B mag [mag]: 11.2 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (342) Endymion approx. diameter [km]: 56 approx. diameter ["]: .041 distance from Earth [AU]: 1.86200 * orbital information: orbit source: Preston date of fit: 2012 Jul 10 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1074 number of rejected observations: 68 time covered by the observations: 1900 Sep 29 - 2012 Jan 21 1 sigma uncertainty ellipse (major, minor, PA): 0.027, 0.014, 108° remarks: * orbital elements for (342) Endymion : Mean anomaly = 13.89827544 deg Arg. of pericenter = 224.42054393 deg Long. of node = 232.71244959 deg Inclination = 7.34941086 deg Eccentricity = 0.12841705 Semimajor axis = 2.56868543 AU Perihelion dist = 2.23882242 AU Mag: H = 10.17, G = 0.15 Epoch of elements : MJD 56253.78900000 TDT (2012 Nov 22.789) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 22 342 Endymion 18h 56.6m UT 9.6 9 22 37.749 7 4 41.09TYC 0234-00547-1 11.2 14.5 56 4.0 1.862 2.005 -21.12 154.3325 7.084 -107.57 -20.33 18.9441 0.19455 0.28383 6.32082 -4.47305 -0.00524 0.00185 2000 12.99116020121119.00000224.420544232.712450 7.3494110.12841705 2.5686854 2.238822410.2 5.00.15 RATE 2.3940750 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.052 0.037 1 2.16 0.048 0 0-3-4 056247.0020121122_0547-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Jul 10, 03:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org