IOTA/IOTA-ES occultation update for (345) Tercidina / 2UCAC 25372814 event on 2008 Mar 28, 13:54 UT Visible from Pacific Islands Summary ------- On 2008 Mar 28 UT, the 108 km diameter asteroid (345) Tercidina will occult a 12.3 mag star in the constellation Sagittarius for observers along a path across Pacific Islands. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.5 mag to 13.5 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 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: 97 * date and approx. time of event: 2008 Mar 28, 13:47 - 2008 Mar 28, 13:55 UT * magnitude of target star: 12.3 * magnitude drop [mag]: 1.5 * estimated maximum duration [s]: 7.7 * Moon: 62 % sunlit, 13° distance * Sun: 98° distance * rough path description: Pacific Islands The occultation path -------------------- * approximate projected width [km]: 108 * 1 sigma uncertainty interval [path widths]: +/- 0.38 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .034 +/- .025) * 1 sigma uncertainty ellipse (major, minor, PA): ( .034", .025", 88° ) * approx speed of asteroid's shadow [km/s]: 14.0378 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 25372814 by 345 Tercidina on 2008 Mar 28 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 142 0 0 -18 47 15 13 47 8 1 108 -70 -19 18 1 -18 16 29 -19 41 23 -17 53 6 143 0 0 -19 5 28 13 47 9 2 108 -71 -19 36 10 -18 34 46 -19 59 30 -18 11 26 144 0 0 -19 23 17 13 47 9 3 107 -71 -19 53 55 -18 52 38 -20 17 12 -18 29 20 145 0 0 -19 40 40 13 47 9 4 107 -71 -20 11 15 -19 10 5 -20 34 29 -18 46 50 146 0 0 -19 57 38 13 47 10 5 107 -71 -20 28 10 -19 27 7 -20 51 21 -19 3 54 147 0 0 -20 14 11 13 47 11 6 106 -72 -20 44 39 -19 43 43 -21 7 48 -19 20 33 148 0 0 -20 30 19 13 47 11 6 106 -72 -21 0 43 -19 59 54 -21 23 50 -19 36 47 149 0 0 -20 46 1 13 47 12 7 106 -72 -21 16 22 -20 15 39 -21 39 26 -19 52 35 150 0 0 -21 1 17 13 47 13 8 105 -72 -21 31 35 -20 30 59 -21 54 36 -20 7 57 151 0 0 -21 16 8 13 47 15 9 105 -72 -21 46 22 -20 45 53 -22 9 21 -20 22 53 152 0 0 -21 30 32 13 47 16 10 104 -72 -22 0 44 -21 0 21 -22 23 40 -20 37 23 153 0 0 -21 44 31 13 47 17 11 104 -72 -22 14 39 -21 14 23 -22 37 33 -20 51 28 154 0 0 -21 58 4 13 47 19 12 104 -71 -22 28 9 -21 27 58 -22 51 0 -21 5 6 155 0 0 -22 11 10 13 47 21 13 103 -71 -22 41 12 -21 41 8 -23 4 2 -21 18 18 156 0 0 -22 23 51 13 47 22 14 103 -71 -22 53 50 -21 53 51 -23 16 37 -21 31 3 157 0 0 -22 36 5 13 47 24 15 103 -71 -23 6 1 -22 6 9 -23 28 46 -21 43 23 158 0 0 -22 47 53 13 47 26 16 102 -70 -23 17 47 -22 17 59 -23 40 29 -21 55 16 159 0 0 -22 59 15 13 47 28 17 102 -70 -23 29 6 -22 29 24 -23 51 46 -22 6 42 160 0 0 -23 10 10 13 47 31 18 101 -69 -23 39 58 -22 40 22 -24 2 37 -22 17 42 161 0 0 -23 20 39 13 47 33 19 101 -69 -23 50 25 -22 50 53 -24 13 1 -22 28 15 162 0 0 -23 30 41 13 47 36 20 101 -69 -24 0 25 -23 0 58 -24 22 59 -22 38 22 163 0 0 -23 40 17 13 47 38 21 100 -68 -24 9 58 -23 10 36 -24 32 31 -22 48 2 164 0 0 -23 49 27 13 47 41 22 100 -67 -24 19 5 -23 19 48 -24 41 37 -22 57 16 165 0 0 -23 58 10 13 47 44 23 99 -67 -24 27 46 -23 28 33 -24 50 16 -23 6 2 166 0 0 -24 6 26 13 47 47 24 99 -66 -24 36 0 -23 36 52 -24 58 29 -23 14 22 167 0 0 -24 14 16 13 47 50 25 99 -66 -24 43 48 -23 44 43 -25 6 15 -23 22 16 168 0 0 -24 21 39 13 47 53 26 98 -65 -24 51 10 -23 52 8 -25 13 35 -23 29 42 169 0 0 -24 28 36 13 47 56 26 98 -65 -24 58 4 -23 59 7 -25 20 28 -23 36 42 170 0 0 -24 35 6 13 47 59 27 97 -64 -25 4 33 -24 5 38 -25 26 55 -23 43 15 171 0 0 -24 41 9 13 48 3 28 97 -63 -25 10 34 -24 11 43 -25 32 56 -23 49 21 172 0 0 -24 46 46 13 48 6 29 97 -63 -25 16 10 -24 17 21 -25 38 30 -23 55 0 173 0 0 -24 51 56 13 48 10 30 96 -62 -25 21 18 -24 22 32 -25 43 37 -24 0 12 174 0 0 -24 56 39 13 48 14 31 96 -61 -25 26 0 -24 27 17 -25 48 18 -24 4 57 175 0 0 -25 0 55 13 48 18 32 95 -60 -25 30 15 -24 31 34 -25 52 33 -24 9 16 176 0 0 -25 4 45 13 48 22 33 95 -60 -25 34 4 -24 35 25 -25 56 21 -24 13 7 177 0 0 -25 8 8 13 48 26 34 94 -59 -25 37 26 -24 38 49 -25 59 42 -24 16 32 178 0 0 -25 11 4 13 48 30 35 94 -58 -25 40 22 -24 41 46 -26 2 37 -24 19 29 179 0 0 -25 13 33 13 48 34 36 94 -58 -25 42 50 -24 44 16 -26 5 5 -24 22 0 180 0 0 -25 15 36 13 48 38 37 93 -57 -25 44 52 -24 46 19 -26 7 7 -24 24 3 -179 0 0 -25 17 12 13 48 43 38 93 -56 -25 46 27 -24 47 55 -26 8 42 -24 25 40 -178 0 0 -25 18 20 13 48 47 38 92 -55 -25 47 36 -24 49 4 -26 9 50 -24 26 49 -177 0 0 -25 19 2 13 48 52 39 92 -55 -25 48 18 -24 49 46 -26 10 31 -24 27 31 -176 0 0 -25 19 17 13 48 56 40 92 -54 -25 48 32 -24 50 1 -26 10 46 -24 27 46 -175 0 0 -25 19 5 13 49 1 41 91 -53 -25 48 20 -24 49 49 -26 10 34 -24 27 34 -174 0 0 -25 18 26 13 49 6 42 91 -52 -25 47 42 -24 49 10 -26 9 56 -24 26 55 -173 0 0 -25 17 20 13 49 11 43 90 -51 -25 46 36 -24 48 3 -26 8 50 -24 25 48 -172 0 0 -25 15 47 13 49 16 44 90 -51 -25 45 3 -24 46 30 -26 7 18 -24 24 14 -171 0 0 -25 13 47 13 49 21 45 90 -50 -25 43 3 -24 44 29 -26 5 18 -24 22 13 -170 0 0 -25 11 19 13 49 27 46 89 -49 -25 40 37 -24 42 1 -26 2 52 -24 19 44 -169 0 0 -25 8 25 13 49 32 47 89 -48 -25 37 43 -24 39 6 -25 59 59 -24 16 48 -168 0 0 -25 5 3 13 49 37 48 88 -47 -25 34 22 -24 35 43 -25 56 39 -24 13 25 -167 0 0 -25 1 14 13 49 43 49 88 -47 -25 30 34 -24 31 53 -25 52 52 -24 9 34 -166 0 0 -24 56 58 13 49 48 50 88 -46 -25 26 19 -24 27 36 -25 48 37 -24 5 16 -165 0 0 -24 52 14 13 49 54 50 87 -45 -25 21 37 -24 22 51 -25 43 56 -24 0 30 -164 0 0 -24 47 3 13 50 0 51 87 -44 -25 16 27 -24 17 38 -25 38 47 -23 55 16 -163 0 0 -24 41 24 13 50 6 52 86 -43 -25 10 50 -24 11 58 -25 33 12 -23 49 35 -162 0 0 -24 35 18 13 50 12 53 86 -42 -25 4 46 -24 5 51 -25 27 9 -23 43 26 -161 0 0 -24 28 45 13 50 18 54 86 -42 -24 58 14 -23 59 15 -25 20 38 -23 36 50 -160 0 0 -24 21 44 13 50 24 55 85 -41 -24 51 15 -23 52 12 -25 13 40 -23 29 46 -159 0 0 -24 14 15 13 50 30 56 85 -40 -24 43 48 -23 44 42 -25 6 15 -23 22 13 -158 0 0 -24 6 19 13 50 36 57 85 -39 -24 35 54 -23 36 43 -24 58 23 -23 14 13 -157 0 0 -23 57 55 13 50 42 58 84 -38 -24 27 32 -23 28 17 -24 50 3 -23 5 46 -156 0 0 -23 49 3 13 50 49 59 84 -37 -24 18 43 -23 19 23 -24 41 15 -22 56 50 -155 0 0 -23 39 44 13 50 55 60 84 -36 -24 9 26 -23 10 1 -24 32 0 -22 47 26 -154 0 0 -23 29 56 13 51 2 61 83 -35 -23 59 41 -23 0 11 -24 22 17 -22 37 34 -153 0 0 -23 19 41 13 51 9 62 83 -35 -23 49 28 -22 49 53 -24 12 6 -22 27 14 -152 0 0 -23 8 58 13 51 15 63 83 -34 -23 38 48 -22 39 7 -24 1 28 -22 16 26 -151 0 0 -22 57 47 13 51 22 64 82 -33 -23 27 40 -22 27 54 -23 50 22 -22 5 10 -150 0 0 -22 46 8 13 51 29 65 82 -32 -23 16 4 -22 16 12 -23 38 48 -21 53 26 -149 0 0 -22 34 1 13 51 36 66 82 -31 -23 4 0 -22 4 2 -23 26 47 -21 41 14 -148 0 0 -22 21 26 13 51 43 67 82 -30 -22 51 28 -21 51 24 -23 14 17 -21 28 33 -147 0 0 -22 8 23 13 51 50 68 81 -29 -22 38 28 -21 38 17 -23 1 20 -21 15 25 -146 0 0 -21 54 52 13 51 58 69 81 -28 -22 25 1 -21 24 43 -22 47 55 -21 1 48 -145 0 0 -21 40 53 13 52 5 70 81 -27 -22 11 5 -21 10 41 -22 34 2 -20 47 43 -144 0 0 -21 26 27 13 52 12 71 81 -26 -21 56 42 -20 56 10 -22 19 41 -20 33 10 -143 0 0 -21 11 32 13 52 20 72 81 -26 -21 41 51 -20 41 12 -22 4 53 -20 18 9 -142 0 0 -20 56 9 13 52 27 73 81 -25 -21 26 31 -20 25 46 -21 49 36 -20 2 39 -141 0 0 -20 40 18 13 52 35 74 81 -24 -21 10 44 -20 9 51 -21 33 52 -19 46 42 -140 0 0 -20 24 0 13 52 42 75 81 -23 -20 54 30 -19 53 29 -21 17 40 -19 30 17 -139 0 0 -20 7 13 13 52 50 75 81 -22 -20 37 47 -19 36 39 -21 1 1 -19 13 24 -138 0 0 -19 49 59 13 52 58 76 81 -21 -20 20 37 -19 19 21 -20 43 53 -18 56 3 -137 0 0 -19 32 17 13 53 6 77 81 -20 -20 2 59 -19 1 35 -20 26 19 -18 38 14 -136 0 0 -19 14 8 13 53 14 79 82 -19 -19 44 54 -18 43 21 -20 8 16 -18 19 57 -135 0 0 -18 55 31 13 53 22 80 82 -18 -19 26 21 -18 24 41 -19 49 47 -18 1 13 -134 0 0 -18 36 27 13 53 30 81 83 -17 -19 7 21 -18 5 32 -19 30 50 -17 42 2 -133 0 0 -18 16 56 13 53 38 82 84 -16 -18 47 54 -17 45 57 -19 11 26 -17 22 23 -132 0 0 -17 56 58 13 53 46 83 85 -15 -18 28 0 -17 25 54 -18 51 35 -17 2 18 -131 0 0 -17 36 32 13 53 54 83 87 -14 -18 7 39 -17 5 25 -18 31 17 -16 41 45 -130 0 0 -17 15 40 13 54 2 84 90 -13 -17 46 51 -16 44 29 -18 10 33 -16 20 46 -129 0 0 -16 54 22 13 54 11 85 95 -12 -17 25 37 -16 23 6 -17 49 22 -15 59 20 -128 0 0 -16 32 38 13 54 19 86 102 -11 -17 3 57 -16 1 17 -17 27 45 -15 37 28 -127 0 0 -16 10 27 13 54 28 87 114 -10 -16 41 51 -15 39 3 -17 5 42 -15 15 10 -126 0 0 -15 47 51 13 54 36 88 135 -9 -16 19 19 -15 16 22 -16 43 13 -14 52 26 -125 0 0 -15 24 49 13 54 44 88 167 -8 -15 56 21 -14 53 16 -16 20 19 -14 29 17 -124 0 0 -15 1 22 13 54 53 87 195 -7 -15 32 59 -14 29 45 -15 57 0 -14 5 42 -123 0 0 -14 37 31 13 55 1 87 211 -6 -15 9 11 -14 5 49 -15 33 15 -13 41 43 -122 0 0 -14 13 14 13 55 10 86 221 -5 -14 44 59 -13 41 29 -15 9 7 -13 17 20 -121 0 0 -13 48 34 13 55 19 85 226 -4 -14 20 24 -13 16 45 -14 44 34 -12 52 33 -120 0 0 -13 23 31 13 55 27 84 230 -3 -13 55 24 -12 51 37 -14 19 38 -12 27 22 -119 0 0 -12 58 4 13 55 36 83 232 -2 -13 30 1 -12 26 6 -13 54 18 -12 1 48 -118 0 0 -12 32 14 13 55 44 82 234 -1 -13 4 16 -12 0 12 -13 28 35 -11 35 51 Uncertainty in time = +/- 4 secs [Prediction of 2008 Mar 13.0] Data for the target star ------------------------ * name: 2UCAC 25372814 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 18 01 21.8212 DE: -17 06 13.331 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .031, .023 ) * V mag [mag]: 12.3 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (345) Tercidina approx. diameter [km]: 108 approx. diameter ["]: .070 distance from Earth [AU]: 2.11900 * orbital information: orbit source: Preston date of fit: 2008 Mar 12 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 743 number of rejected observations: 140 time covered by the observations: 1901 Mar 27 - 2008 Jan 20 1 sigma uncertainty ellipse (major, minor, PA): 0.016, 0.010, 83° remarks: * orbital elements for (345) Tercidina : Mean anomaly = 162.44073005 deg Arg. of pericenter = 229.72092644 deg Long. of node = 212.78639818 deg Inclination = 9.74965629 deg Eccentricity = 0.06090939 Semimajor axis = 2.32562833 AU Perihelion dist = 2.18397573 AU Mag: H = 8.67, G = 0.10 Epoch of elements : MJD 54553.58000000 TDT (2008 Mar 28.580) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Mar 28 345 Tercidina 13h 54.7m UT 12.3 18 1 21.821-17 6 13.332UCAC 25372814 0.0 13.5 108 7.7 2.119 2.137 11.90 -124.6900 -17.107 -27.44 3.28 13.9118 -0.01114 0.02969 7.38702 2.86549 -0.00559 -0.00009 2000 161.4458362008 325.00000229.720926212.786398 9.7496560.06090939 2.3256283 2.1839757 8.7 5.00.10 RATE 2.7790330 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.034 0.025 88 1.38 0.026 0 54538.5020080328_372814 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 13, 00:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org