IOTA/IOTA-ES occultation update for (478) Tergeste / 2UCAC 36628416 event on 2012 Oct 26, 11:28 UT Visible from USA, Canada Summary ------- On 2012 Oct 26 UT, the 86 km diameter asteroid (478) Tergeste will occult a 13.3 mag star in the constellation Gemini for observers along a path across USA, Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.7 mag to 13.1 mag (the magnitude of the asteroid) for at most 7.7 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 72 * date and approx. time of event: 2012 Oct 26, 11:20 - 2012 Oct 26, 11:30 UT * geocentric midpoint of event [JD]: 2456226.97865417 * magnitude of target star: 13.3 * magnitude drop [mag]: 0.7 * estimated maximum duration [s]: 7.7 * Moon: 89 % sunlit, 112° distance * Sun: 106° distance * rough path description: USA, Canada The occultation path -------------------- * approximate projected width [km]: 90 * 1 sigma uncertainty interval [path widths]: +/- 0.80 * 1 sigma uncertainty interval [seconds]: +/- 6.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .046 +/- .036) * 1 sigma uncertainty ellipse (major, minor, PA): ( .046", .036", 93° ) * approx speed of asteroid's shadow [km/s]: 11.1440 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 36628416 by 478 Tergeste on 2012 Oct 26 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 - 82 0 0 21 30 20 11 30 13 71 249 0 20 50 56 22 9 59 19 48 18 23 13 53 - 83 0 0 22 41 11 11 29 58 72 244 -2 22 1 43 23 20 53 20 58 59 24 24 53 - 84 0 0 23 51 37 11 29 43 72 239 -3 23 12 6 24 31 21 22 9 19 25 35 25 - 85 0 0 25 1 32 11 29 28 72 234 -4 24 22 0 25 41 17 23 19 10 26 45 22 - 86 0 0 26 10 50 11 29 13 72 229 -5 25 31 18 26 50 35 24 28 29 27 54 39 - 87 0 0 27 19 27 11 28 58 72 224 -6 26 39 57 27 59 10 25 37 10 29 3 11 - 88 0 0 28 27 17 11 28 43 72 219 -8 27 47 50 29 6 57 26 45 8 30 10 53 - 89 0 0 29 34 15 11 28 29 71 214 -9 28 54 53 30 13 51 27 52 18 31 17 40 - 90 0 0 30 40 19 11 28 15 71 210 -10 30 1 1 31 19 48 28 58 35 32 23 27 - 91 0 0 31 45 22 11 28 1 70 205 -11 31 6 12 32 24 45 30 3 56 33 28 12 - 92 0 0 32 49 22 11 27 47 70 201 -12 32 10 20 33 28 36 31 8 16 34 31 50 - 93 0 0 33 52 15 11 27 34 69 198 -13 33 13 22 34 31 20 32 11 33 35 34 19 - 94 0 0 34 53 59 11 27 21 68 194 -14 34 15 16 35 32 53 33 13 43 36 35 35 - 95 0 0 35 54 30 11 27 8 67 191 -15 35 15 59 36 33 14 34 14 43 37 35 36 - 96 0 0 36 53 47 11 26 55 67 188 -16 36 15 28 37 32 18 35 14 32 38 34 21 - 97 0 0 37 51 48 11 26 43 66 185 -17 37 13 42 38 30 6 36 13 6 39 31 47 - 98 0 0 38 48 31 11 26 31 65 182 -17 38 10 39 39 26 35 37 10 24 40 27 53 - 99 0 0 39 43 55 11 26 19 64 180 -18 39 6 17 40 21 44 38 6 26 41 22 38 -100 0 0 40 38 0 11 26 8 63 178 -19 40 0 37 41 15 33 39 1 10 42 16 2 -101 0 0 41 30 44 11 25 57 62 176 -20 40 53 37 42 8 2 39 54 35 43 8 4 -102 0 0 42 22 8 11 25 46 61 174 -21 41 45 17 42 59 9 40 46 40 43 58 44 -103 0 0 43 12 11 11 25 36 60 172 -21 42 35 37 43 48 55 41 37 27 44 48 3 -104 0 0 44 0 54 11 25 26 59 170 -22 43 24 37 44 37 21 42 26 54 45 36 1 -105 0 0 44 48 17 11 25 16 58 168 -23 44 12 18 45 24 26 43 15 2 46 22 37 -106 0 0 45 34 21 11 25 7 58 167 -23 44 58 40 46 10 12 44 1 51 47 7 54 -107 0 0 46 19 7 11 24 57 57 165 -24 45 43 43 46 54 40 44 47 23 47 51 52 -108 0 0 47 2 35 11 24 49 56 164 -25 46 27 29 47 37 50 45 31 37 48 34 32 -109 0 0 47 44 47 11 24 40 55 162 -25 47 9 59 48 19 43 46 14 36 49 15 56 -110 0 0 48 25 44 11 24 32 54 161 -26 47 51 14 49 0 22 46 56 20 49 56 5 -111 0 0 49 5 26 11 24 24 53 159 -26 48 31 15 49 39 46 47 36 49 50 34 59 -112 0 0 49 43 57 11 24 16 52 158 -27 49 10 4 50 17 58 48 16 7 51 12 41 -113 0 0 50 21 16 11 24 8 52 157 -27 49 47 41 50 54 59 48 54 13 51 49 13 -114 0 0 50 57 26 11 24 1 51 156 -28 50 24 9 51 30 51 49 31 9 52 24 35 -115 0 0 51 32 28 11 23 54 50 154 -28 50 59 29 52 5 35 50 6 57 52 58 50 -116 0 0 52 6 24 11 23 47 49 153 -29 51 33 42 52 39 12 50 41 38 53 31 58 -117 0 0 52 39 14 11 23 41 48 152 -29 52 6 50 53 11 45 51 15 14 54 4 3 -118 0 0 53 11 2 11 23 34 48 151 -30 52 38 55 53 43 15 51 47 46 54 35 4 -119 0 0 53 41 47 11 23 28 47 150 -30 53 9 58 54 13 44 52 19 15 55 5 5 -120 0 0 54 11 33 11 23 22 46 149 -30 53 40 0 54 43 13 52 49 44 55 34 6 -121 0 0 54 40 20 11 23 17 45 148 -31 54 9 4 55 11 43 53 19 14 56 2 10 -122 0 0 55 8 10 11 23 11 45 146 -31 54 37 10 55 39 17 53 47 46 56 29 17 -123 0 0 55 35 5 11 23 6 44 145 -31 55 4 21 56 5 55 54 15 22 56 55 30 -124 0 0 56 1 6 11 23 0 43 144 -32 55 30 37 56 31 40 54 42 4 57 20 49 -125 0 0 56 26 14 11 22 55 43 143 -32 55 56 1 56 56 33 55 7 52 57 45 17 -126 0 0 56 50 32 11 22 50 42 142 -32 56 20 33 57 20 36 55 32 48 58 8 55 -127 0 0 57 13 59 11 22 46 41 141 -33 56 44 16 57 43 49 55 56 53 58 31 44 -128 0 0 57 36 39 11 22 41 41 140 -33 57 7 10 58 6 14 56 20 10 58 53 45 -129 0 0 57 58 32 11 22 37 40 139 -33 57 29 16 58 27 52 56 42 39 59 15 1 -130 0 0 58 19 39 11 22 32 39 138 -33 57 50 37 58 48 45 57 4 22 59 35 32 -131 0 0 58 40 1 11 22 28 39 137 -34 58 11 13 59 8 55 57 25 19 59 55 19 -132 0 0 58 59 41 11 22 24 38 136 -34 58 31 6 59 28 21 57 45 32 60 14 25 -133 0 0 59 18 39 11 22 20 38 135 -34 58 50 17 59 47 6 58 5 3 60 32 49 -134 0 0 59 36 56 11 22 16 37 134 -34 59 8 46 60 5 11 58 23 51 60 50 34 -135 0 0 59 54 33 11 22 13 36 133 -35 59 26 35 60 22 36 58 42 0 61 7 39 -136 0 0 60 11 32 11 22 9 36 132 -35 59 43 46 60 39 23 58 59 29 61 24 8 -137 0 0 60 27 53 11 22 6 35 131 -35 60 0 18 60 55 33 59 16 19 61 39 59 -138 0 0 60 43 38 11 22 2 35 130 -35 60 16 14 61 11 7 59 32 32 61 55 15 -139 0 0 60 58 47 11 21 59 34 129 -35 60 31 33 61 26 5 59 48 8 62 9 56 -140 0 0 61 13 21 11 21 56 34 128 -35 60 46 18 61 40 29 60 3 9 62 24 3 -141 0 0 61 27 21 11 21 52 33 127 -36 61 0 28 61 54 19 60 17 35 62 37 37 -142 0 0 61 40 49 11 21 49 33 126 -36 61 14 5 62 7 37 60 31 27 62 50 39 -143 0 0 61 53 44 11 21 46 32 125 -36 61 27 9 62 20 23 60 44 46 63 3 10 -144 0 0 62 6 8 11 21 44 32 125 -36 61 39 42 62 32 37 60 57 33 63 15 10 -145 0 0 62 18 1 11 21 41 31 124 -36 61 51 43 62 44 22 61 9 48 63 26 41 -146 0 0 62 29 24 11 21 38 31 123 -36 62 3 15 62 55 37 61 21 33 63 37 42 -147 0 0 62 40 17 11 21 35 30 122 -36 62 14 16 63 6 22 61 32 47 63 48 15 -148 0 0 62 50 42 11 21 33 30 121 -36 62 24 49 63 16 40 61 43 32 63 58 20 -149 0 0 63 0 39 11 21 30 29 120 -37 62 34 53 63 26 29 61 53 48 64 7 57 -150 0 0 63 10 9 11 21 28 29 119 -37 62 44 30 63 35 52 62 3 35 64 17 8 -151 0 0 63 19 11 11 21 25 28 118 -37 62 53 39 63 44 48 62 12 55 64 25 53 -152 0 0 63 27 48 11 21 23 28 117 -37 63 2 22 63 53 17 62 21 48 64 34 13 -153 0 0 63 35 58 11 21 21 27 116 -37 63 10 38 64 1 21 62 30 14 64 42 7 -154 0 0 63 43 43 11 21 19 27 115 -37 63 18 29 64 9 0 62 38 14 64 49 37 -155 0 0 63 51 3 11 21 16 26 114 -37 63 25 54 64 16 15 62 45 48 64 56 42 -156 0 0 63 57 58 11 21 14 26 113 -37 63 32 55 64 23 5 62 52 57 65 3 24 -157 0 0 64 4 29 11 21 12 25 112 -37 63 39 31 64 29 31 62 59 40 65 9 42 -158 0 0 64 10 37 11 21 10 25 111 -37 63 45 43 64 35 34 63 6 0 65 15 37 -159 0 0 64 16 20 11 21 8 25 110 -37 63 51 31 64 41 14 63 11 55 65 21 10 -160 0 0 64 21 41 11 21 6 24 109 -37 63 56 56 64 46 30 63 17 26 65 26 20 -161 0 0 64 26 39 11 21 4 24 108 -37 64 1 58 64 51 25 63 22 34 65 31 8 -162 0 0 64 31 15 11 21 2 23 108 -37 64 6 37 64 55 57 63 27 18 65 35 35 -163 0 0 64 35 28 11 21 1 23 107 -38 64 10 53 65 0 7 63 31 40 65 39 40 -164 0 0 64 39 19 11 20 59 22 106 -38 64 14 47 65 3 55 63 35 38 65 43 23 -165 0 0 64 42 49 11 20 57 22 105 -38 64 18 19 65 7 22 63 39 14 65 46 46 -166 0 0 64 45 57 11 20 55 22 104 -38 64 21 29 65 10 27 63 42 28 65 49 47 -167 0 0 64 48 43 11 20 54 21 103 -38 64 24 18 65 13 11 63 45 20 65 52 28 -168 0 0 64 51 8 11 20 52 21 102 -38 64 26 45 65 15 35 63 47 50 65 54 49 -169 0 0 64 53 12 11 20 51 20 101 -38 64 28 50 65 17 37 63 49 58 65 56 49 -170 0 0 64 54 55 11 20 49 20 100 -38 64 30 34 65 19 19 63 51 44 65 58 28 -171 0 0 64 56 17 11 20 48 19 99 -38 64 31 57 65 20 40 63 53 8 65 59 48 -172 0 0 64 57 18 11 20 46 19 98 -38 64 32 59 65 21 41 63 54 11 66 0 47 -173 0 0 64 57 59 11 20 45 19 97 -38 64 33 40 65 22 21 63 54 53 66 1 27 -174 0 0 64 58 18 11 20 43 18 96 -38 64 34 0 65 22 40 63 55 13 66 1 46 -175 0 0 64 58 17 11 20 42 18 95 -38 64 33 59 65 22 39 63 55 12 66 1 45 -176 0 0 64 57 56 11 20 41 17 95 -38 64 33 37 65 22 18 63 54 49 66 1 25 -177 0 0 64 57 14 11 20 39 17 94 -38 64 32 54 65 21 36 63 54 5 66 0 44 -178 0 0 64 56 10 11 20 38 16 93 -38 64 31 50 65 20 34 63 53 0 65 59 44 -179 0 0 64 54 47 11 20 37 16 92 -38 64 30 25 65 19 12 63 51 33 65 58 23 -180 0 0 64 53 2 11 20 35 16 91 -38 64 28 39 65 17 28 63 49 44 65 56 42 179 0 0 64 50 56 11 20 34 15 90 -38 64 26 31 65 15 25 63 47 34 65 54 41 178 0 0 64 48 30 11 20 33 15 89 -38 64 24 3 65 13 0 63 45 2 65 52 20 177 0 0 64 45 42 11 20 32 14 88 -38 64 21 13 65 10 14 63 42 9 65 49 38 176 0 0 64 42 33 11 20 31 14 87 -38 64 18 1 65 7 8 63 38 53 65 46 35 175 0 0 64 39 2 11 20 30 13 86 -38 64 14 28 65 3 40 63 35 15 65 43 12 174 0 0 64 35 10 11 20 29 13 85 -37 64 10 32 64 59 51 63 31 15 65 39 28 173 0 0 64 30 56 11 20 28 13 84 -37 64 6 15 64 55 41 63 26 52 65 35 23 172 0 0 64 26 20 11 20 27 12 84 -37 64 1 35 64 51 8 63 22 7 65 30 57 171 0 0 64 21 22 11 20 26 12 83 -37 63 56 33 64 46 14 63 16 58 65 26 9 170 0 0 64 16 1 11 20 25 11 82 -37 63 51 8 64 40 57 63 11 27 65 20 59 169 0 0 64 10 17 11 20 24 11 81 -37 63 45 20 64 35 18 63 5 31 65 15 27 168 0 0 64 4 10 11 20 23 10 80 -37 63 39 8 64 29 16 62 59 12 65 9 32 167 0 0 63 57 40 11 20 22 10 79 -37 63 32 33 64 22 51 62 52 29 65 3 15 166 0 0 63 50 46 11 20 21 9 78 -37 63 25 34 64 16 2 62 45 21 64 56 35 165 0 0 63 43 28 11 20 21 9 77 -37 63 18 10 64 8 49 62 37 49 64 49 32 164 0 0 63 35 45 11 20 20 8 76 -37 63 10 21 64 1 13 62 29 51 64 42 5 163 0 0 63 27 37 11 20 19 8 75 -37 63 2 7 63 53 11 62 21 27 64 34 13 162 0 0 63 19 4 11 20 18 8 75 -37 62 53 28 63 44 45 62 12 37 64 25 57 161 0 0 63 10 5 11 20 18 7 74 -37 62 44 22 63 35 52 62 3 21 64 17 16 160 0 0 63 0 40 11 20 17 7 73 -36 62 34 50 63 26 34 61 53 38 64 8 9 159 0 0 62 50 48 11 20 17 6 72 -36 62 24 51 63 16 50 61 43 27 63 58 37 158 0 0 62 40 29 11 20 16 6 71 -36 62 14 24 63 6 38 61 32 48 63 48 37 157 0 0 62 29 42 11 20 16 5 70 -36 62 3 29 62 55 59 61 21 40 63 38 11 156 0 0 62 18 26 11 20 15 5 69 -36 61 52 5 62 44 52 61 10 3 63 27 17 155 0 0 62 6 41 11 20 15 4 68 -36 61 40 12 62 33 15 60 57 56 63 15 55 154 0 0 61 54 27 11 20 14 4 67 -36 61 27 48 62 21 10 60 45 19 63 4 4 153 0 0 61 41 42 11 20 14 3 67 -36 61 14 55 62 8 34 60 32 11 62 51 43 152 0 0 61 28 26 11 20 14 3 66 -35 61 1 29 61 55 28 60 18 31 62 38 52 151 0 0 61 14 39 11 20 14 2 65 -35 60 47 32 61 41 50 60 4 19 62 25 30 150 0 0 61 0 19 11 20 13 1 64 -35 60 33 2 61 27 40 59 49 33 62 11 36 149 0 0 60 45 26 11 20 13 1 63 -35 60 17 59 61 12 57 59 34 13 61 57 10 148 0 0 60 29 58 11 20 13 0 62 -35 60 2 21 60 57 41 .. .. .. 61 42 11 Uncertainty in time = +/- 7 secs Prediction of 2012 Sep 3.0 Data for the target star ------------------------ * name: 2UCAC 36628416 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 10 28.4621 DE: +13 42 51.163 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .041, .035 ) * V mag [mag]: 13.3 * B mag [mag]: 0.0 * Apparent position with proper motion RA(deg): 107.8048537848 DE(deg): 13.6914395275 * Equation of equinoxes (radians) : 0.000059255182304 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (478) Tergeste approx. diameter [km]: 86 approx. diameter ["]: .051 distance from Earth [AU]: 2.34300 * orbital information: orbit source: Preston date of fit: 2012 Jul 10 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1044 number of rejected observations: 85 time covered by the observations: 1901 Sep 22 - 2012 Feb 02 1 sigma uncertainty ellipse (major, minor, PA): 0.020, 0.011, 106° remarks: * orbital elements for (478) Tergeste : Mean anomaly = 338.59205248 deg Arg. of pericenter = 239.17595193 deg Long. of node = 233.93849673 deg Inclination = 13.18660672 deg Eccentricity = 0.08517689 Semimajor axis = 3.01871528 AU Perihelion dist = 2.76159050 AU Mag: H = 7.93, G = 0.15 Epoch of elements : MJD 56226.47800000 TDT (2012 Oct 26.478) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 26 478 Tergeste 11h 29.3m UT 13.3 7 10 28.462 13 42 51.162UCAC 36628416 0.0 13.1 86 7.7 2.343 1.137 -16.80 -99.9402 13.719 3.67 -12.67 11.4877 0.21685 0.21603 4.41902 -4.47618 -0.00550 0.00092 2000 337.37471220121020.00000239.175952233.938497 13.1866070.08517689 3.0187153 2.7615905 8.0 5.00.15 RATE 1.8791910 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.046 0.036 93 1.80 0.041 0 0 1 3 056173.0020121026_628416 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Sep 03, 20:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org