IOTA/IOTA-ES occultation update for (147) Protogeneia / 2UCAC 22545416 event on 2008 Mar 25, 13:51 UT Visible from New Zealand, Australia Summary ------- On 2008 Mar 25 UT, the 133 km diameter asteroid (147) Protogeneia will occult a 11.6 mag star in the constellation Sagittarius for observers along a path across New Zealand, Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.6 mag to 14.1 mag (the magnitude of the asteroid) for at most 7.9 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: 96 * date and approx. time of event: 2008 Mar 25, 13:45 - 2008 Mar 25, 13:50 UT * magnitude of target star: 11.6 * magnitude drop [mag]: 2.6 * estimated maximum duration [s]: 7.9 * Moon: 86 % sunlit, 48° distance * Sun: 89° distance * rough path description: New Zealand, Australia The occultation path -------------------- * approximate projected width [km]: 157 * 1 sigma uncertainty interval [path widths]: +/- 0.42 * 1 sigma uncertainty interval [seconds]: +/- 3.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .028 +/- .025) * 1 sigma uncertainty ellipse (major, minor, PA): ( .028", .025", 89° ) * approx speed of asteroid's shadow [km/s]: 16.8781 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 22545416 by 147 Protogeneia on 2008 Mar 25 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 140 0 0 -34 0 5 13 45 48 0 118 -55 -34 49 1 .. .. .. -35 30 31 .. .. .. 141 0 0 -34 26 45 13 45 48 1 117 -55 -35 15 42 -33 38 19 -35 57 13 -32 57 59 142 0 0 -34 53 20 13 45 48 2 117 -55 -35 42 17 -34 4 52 -36 23 48 -33 24 32 143 0 0 -35 19 47 13 45 49 3 116 -55 -36 8 45 -34 31 19 -36 50 17 -33 50 59 144 0 0 -35 46 8 13 45 49 4 116 -55 -36 35 7 -34 57 40 -37 16 39 -34 17 19 145 0 0 -36 12 21 13 45 50 5 115 -55 -37 1 20 -35 23 53 -37 42 52 -34 43 32 146 0 0 -36 38 26 13 45 50 6 115 -55 -37 27 24 -35 49 58 -38 8 56 -35 9 37 147 0 0 -37 4 22 13 45 51 6 114 -54 -37 53 19 -36 15 54 -38 34 51 -35 35 34 148 0 0 -37 30 7 13 45 52 7 113 -54 -38 19 4 -36 41 41 -39 0 35 -36 1 21 149 0 0 -37 55 43 13 45 53 8 113 -54 -38 44 38 -37 7 17 -39 26 8 -36 26 58 150 0 0 -38 21 7 13 45 54 9 112 -54 -39 10 1 -37 32 43 -39 51 30 -36 52 25 151 0 0 -38 46 20 13 45 55 10 111 -53 -39 35 12 -37 57 57 -40 16 40 -37 17 41 152 0 0 -39 11 20 13 45 57 11 111 -53 -40 0 11 -38 23 0 -40 41 36 -37 42 45 153 0 0 -39 36 8 13 45 58 12 110 -53 -40 24 56 -38 47 49 -41 6 20 -38 7 36 154 0 0 -40 0 42 13 45 59 13 109 -52 -40 49 28 -39 12 26 -41 30 50 -38 32 15 155 0 0 -40 25 3 13 46 1 14 109 -52 -41 13 46 -39 36 49 -41 55 5 -38 56 40 156 0 0 -40 49 9 13 46 3 14 108 -51 -41 37 49 -40 0 58 -42 19 6 -39 20 51 157 0 0 -41 13 0 13 46 4 15 107 -51 -42 1 37 -40 24 53 -42 42 51 -39 44 48 158 0 0 -41 36 36 13 46 6 16 107 -50 -42 25 10 -40 48 32 -43 6 20 -40 8 30 159 0 0 -41 59 56 13 46 8 17 106 -50 -42 48 26 -41 11 56 -43 29 34 -40 31 57 160 0 0 -42 23 0 13 46 10 18 105 -50 -43 11 26 -41 35 3 -43 52 30 -40 55 8 161 0 0 -42 45 48 13 46 12 19 105 -49 -43 34 9 -41 57 55 -44 15 10 -41 18 3 162 0 0 -43 8 18 13 46 14 19 104 -49 -43 56 35 -42 20 29 -44 37 32 -41 40 41 163 0 0 -43 30 31 13 46 16 20 103 -48 -44 18 44 -42 42 47 -44 59 37 -42 3 2 164 0 0 -43 52 27 13 46 19 21 102 -48 -44 40 35 -43 4 47 -45 21 23 -42 25 6 165 0 0 -44 14 4 13 46 21 22 101 -47 -45 2 7 -43 26 30 -45 42 52 -42 46 52 166 0 0 -44 35 24 13 46 23 23 101 -46 -45 23 21 -43 47 54 -46 4 1 -43 8 21 167 0 0 -44 56 24 13 46 26 23 100 -46 -45 44 17 -44 9 0 -46 24 52 -43 29 31 168 0 0 -45 17 6 13 46 28 24 99 -45 -46 4 53 -44 29 47 -46 45 24 -43 50 22 169 0 0 -45 37 30 13 46 31 25 98 -45 -46 25 11 -44 50 16 -47 5 36 -44 10 55 170 0 0 -45 57 33 13 46 33 26 97 -44 -46 45 9 -45 10 25 -47 25 30 -44 31 9 171 0 0 -46 17 18 13 46 36 26 97 -44 -47 4 47 -45 30 15 -47 45 3 -44 51 4 172 0 0 -46 36 43 13 46 39 27 96 -43 -47 24 6 -45 49 46 -48 4 17 -45 10 40 173 0 0 -46 55 48 13 46 41 28 95 -43 -47 43 5 -46 8 57 -48 23 11 -45 29 56 174 0 0 -47 14 33 13 46 44 28 94 -42 -48 1 45 -46 27 49 -48 41 44 -45 48 52 175 0 0 -47 32 59 13 46 47 29 93 -41 -48 20 4 -46 46 20 -48 59 58 -46 7 29 176 0 0 -47 51 4 13 46 50 30 92 -41 -48 38 3 -47 4 32 -49 17 51 -46 25 45 177 0 0 -48 8 49 13 46 53 31 91 -40 -48 55 41 -47 22 23 -49 35 25 -46 43 42 178 0 0 -48 26 14 13 46 56 31 90 -40 -49 13 0 -47 39 55 -49 52 37 -47 1 19 179 0 0 -48 43 19 13 46 59 32 89 -39 -49 29 58 -47 57 6 -50 9 30 -47 18 35 180 0 0 -49 0 4 13 47 2 33 89 -38 -49 46 36 -48 13 57 -50 26 2 -47 35 31 -179 0 0 -49 16 28 13 47 5 33 88 -38 -50 2 53 -48 30 27 -50 42 14 -47 52 7 -178 0 0 -49 32 31 13 47 8 34 87 -37 -50 18 50 -48 46 37 -50 58 5 -48 8 23 -177 0 0 -49 48 15 13 47 11 34 86 -37 -50 34 27 -49 2 27 -51 13 36 -48 24 18 -176 0 0 -50 3 38 13 47 14 35 85 -36 -50 49 43 -49 17 57 -51 28 46 -48 39 53 -175 0 0 -50 18 40 13 47 17 36 84 -35 -51 4 39 -49 33 6 -51 43 37 -48 55 7 -174 0 0 -50 33 23 13 47 21 36 83 -35 -51 19 15 -49 47 55 -51 58 7 -49 10 2 -173 0 0 -50 47 45 13 47 24 37 82 -34 -51 33 31 -50 2 24 -52 12 16 -49 24 36 -172 0 0 -51 1 47 13 47 27 38 81 -34 -51 47 26 -50 16 32 -52 26 6 -49 38 49 -171 0 0 -51 15 29 13 47 30 38 80 -33 -52 1 1 -50 30 20 -52 39 35 -49 52 43 -170 0 0 -51 28 50 13 47 34 39 78 -32 -52 14 16 -50 43 48 -52 52 45 -50 6 16 -169 0 0 -51 41 52 13 47 37 39 77 -32 -52 27 11 -50 56 56 -53 5 34 -50 19 29 -168 0 0 -51 54 33 13 47 40 40 76 -31 -52 39 46 -51 9 44 -53 18 4 -50 32 22 -167 0 0 -52 6 55 13 47 43 40 75 -31 -52 52 1 -51 22 11 -53 30 13 -50 44 55 -166 0 0 -52 18 56 13 47 47 41 74 -30 -53 3 57 -51 34 19 -53 42 3 -50 57 8 -165 0 0 -52 30 38 13 47 50 41 73 -30 -53 15 32 -51 46 7 -53 53 34 -51 9 1 -164 0 0 -52 42 1 13 47 53 42 72 -29 -53 26 49 -51 57 36 -54 4 45 -51 20 34 -163 0 0 -52 53 3 13 47 57 42 71 -28 -53 37 45 -52 8 44 -54 15 36 -51 31 47 -162 0 0 -53 3 47 13 48 0 43 70 -28 -53 48 22 -52 19 33 -54 26 8 -51 42 41 -161 0 0 -53 14 10 13 48 4 44 68 -27 -53 58 40 -52 30 3 -54 36 21 -51 53 15 -160 0 0 -53 24 15 13 48 7 44 67 -27 -54 8 39 -52 40 13 -54 46 15 -52 3 30 -159 0 0 -53 34 0 13 48 10 44 66 -26 -54 18 19 -52 50 4 -54 55 50 -52 13 25 -158 0 0 -53 43 26 13 48 14 45 65 -25 -54 27 40 -52 59 35 -55 5 6 -52 23 1 -157 0 0 -53 52 34 13 48 17 45 64 -25 -54 36 42 -53 8 48 -55 14 4 -52 32 18 -156 0 0 -54 1 22 13 48 21 46 62 -24 -54 45 25 -53 17 41 -55 22 42 -52 41 15 -155 0 0 -54 9 51 13 48 24 46 61 -24 -54 53 49 -53 26 15 -55 31 2 -52 49 54 -154 0 0 -54 18 2 13 48 28 47 60 -23 -55 1 55 -53 34 31 -55 39 4 -52 58 13 -153 0 0 -54 25 54 13 48 31 47 59 -23 -55 9 42 -53 42 28 -55 46 47 -53 6 14 -152 0 0 -54 33 28 13 48 35 48 57 -22 -55 17 11 -53 50 6 -55 54 12 -53 13 56 -151 0 0 -54 40 43 13 48 38 48 56 -21 -55 24 22 -53 57 26 -56 1 19 -53 21 19 -150 0 0 -54 47 40 13 48 42 49 55 -21 -55 31 14 -54 4 27 -56 8 8 -53 28 24 -149 0 0 -54 54 19 13 48 45 49 53 -20 -55 37 49 -54 11 9 -56 14 38 -53 35 10 -148 0 0 -55 0 39 13 48 49 49 52 -20 -55 44 5 -54 17 34 -56 20 51 -53 41 38 -147 0 0 -55 6 42 13 48 52 50 51 -19 -55 50 4 -54 23 40 -56 26 47 -53 47 47 -146 0 0 -55 12 26 13 48 56 50 49 -19 -55 55 45 -54 29 28 -56 32 24 -53 53 38 -145 0 0 -55 17 52 13 48 59 50 48 -18 -56 1 8 -54 34 58 -56 37 44 -53 59 11 -144 0 0 -55 23 1 13 49 3 51 47 -17 -56 6 13 -54 40 10 -56 42 47 -54 4 25 -143 0 0 -55 27 52 13 49 6 51 45 -17 -56 11 1 -54 45 4 -56 47 32 -54 9 22 -142 0 0 -55 32 25 13 49 10 52 44 -16 -56 15 31 -54 49 40 -56 51 59 -54 14 0 -141 0 0 -55 36 41 13 49 14 52 42 -16 -56 19 43 -54 53 58 -56 56 9 -54 18 21 -140 0 0 -55 40 39 13 49 17 52 41 -15 -56 23 39 -54 57 59 -57 0 3 -54 22 24 -139 0 0 -55 44 19 13 49 21 53 39 -15 -56 27 17 -55 1 42 -57 3 39 -54 26 8 -138 0 0 -55 47 42 13 49 24 53 38 -14 -56 30 38 -55 5 7 -57 6 57 -54 29 36 -137 0 0 -55 50 48 13 49 28 53 36 -13 -56 33 41 -55 8 15 -57 9 59 -54 32 45 -136 0 0 -55 53 36 13 49 31 53 35 -13 -56 36 28 -55 11 5 -57 12 44 -54 35 37 -135 0 0 -55 56 7 13 49 35 54 33 -12 -56 38 57 -55 13 38 -57 15 12 -54 38 11 -134 0 0 -55 58 21 13 49 39 54 32 -12 -56 41 9 -55 15 53 -57 17 23 -54 40 27 -133 0 0 -56 0 17 13 49 42 54 30 -11 -56 43 4 -55 17 51 -57 19 17 -54 42 26 -132 0 0 -56 1 57 13 49 46 55 29 -11 -56 44 42 -55 19 31 -57 20 54 -54 44 7 -131 0 0 -56 3 19 13 49 50 55 27 -10 -56 46 4 -55 20 54 -57 22 14 -54 45 31 -130 0 0 -56 4 24 13 49 53 55 26 -10 -56 47 8 -55 22 0 -57 23 18 -54 46 37 -129 0 0 -56 5 12 13 49 57 55 24 -9 -56 47 55 -55 22 48 -57 24 4 -54 47 26 -128 0 0 -56 5 42 13 50 0 55 22 -8 -56 48 25 -55 23 19 -57 24 34 -54 47 58 -127 0 0 -56 5 56 13 50 4 56 21 -8 -56 48 39 -55 23 33 -57 24 47 -54 48 11 -126 0 0 -56 5 52 13 50 8 56 19 -7 -56 48 35 -55 23 29 -57 24 44 -54 48 8 -125 0 0 -56 5 31 13 50 12 56 17 -7 -56 48 14 -55 23 8 -57 24 23 -54 47 47 -124 0 0 -56 4 53 13 50 15 56 16 -6 -56 47 37 -55 22 30 -57 23 46 -54 47 8 -123 0 0 -56 3 58 13 50 19 56 14 -6 -56 46 43 -55 21 34 -57 22 52 -54 46 12 -122 0 0 -56 2 46 13 50 23 56 12 -5 -56 45 31 -55 20 21 -57 21 42 -54 44 59 -121 0 0 -56 1 17 13 50 26 57 11 -4 -56 44 3 -55 18 51 -57 20 14 -54 43 27 -120 0 0 -55 59 30 13 50 30 57 9 -4 -56 42 17 -55 17 3 -57 18 30 -54 41 39 -119 0 0 -55 57 26 13 50 34 57 7 -3 -56 40 15 -55 14 58 -57 16 28 -54 39 33 -118 0 0 -55 55 5 13 50 38 57 6 -3 -56 37 55 -55 12 36 -57 14 10 -54 37 9 -117 0 0 -55 52 27 13 50 41 57 4 -2 -56 35 19 -55 9 55 -57 11 35 -54 34 27 -116 0 0 -55 49 31 13 50 45 57 2 -2 -56 32 25 -55 6 58 -57 8 43 -54 31 28 -115 0 0 -55 46 18 13 50 49 57 0 -1 -56 29 14 -55 3 43 -57 5 33 -54 28 11 -114 0 0 -55 42 47 13 50 53 57 359 0 -56 25 45 -55 0 10 -57 2 7 -54 24 36 Uncertainty in time = +/- 4 secs [Prediction of 2008 Mar 12.0] Data for the target star ------------------------ * name: 2UCAC 22545416 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 18 24 58.8946 DE: -23 00 44.864 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .023 ) * V mag [mag]: 11.6 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (147) Protogeneia approx. diameter [km]: 133 approx. diameter ["]: .061 distance from Earth [AU]: 2.99500 * orbital information: orbit source: Preston date of fit: 2008 Mar 12 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 881 number of rejected observations: 117 time covered by the observations: 1903 Aug 05 - 2007 Aug 14 1 sigma uncertainty ellipse (major, minor, PA): 0.017, 0.011, 86° remarks: * orbital elements for (147) Protogeneia : Mean anomaly = 267.65573754 deg Arg. of pericenter = 104.69128312 deg Long. of node = 248.72487301 deg Inclination = 1.93455111 deg Eccentricity = 0.03326303 Semimajor axis = 3.13866467 AU Perihelion dist = 3.03426318 AU Mag: H = 8.55, G = 0.15 Epoch of elements : MJD 54550.57700000 TDT (2008 Mar 25.577) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Mar 25 147 Protogeneia 13h 51.1m UT 11.6 18 24 58.895-23 0 44.862UCAC 22545416 0.0 14.1 133 7.9 2.995 2.019 2.35 -114.9296 -23.014 -26.31 2.10 13.8520 0.04559 -0.53322 9.49281 0.80004 -0.00583 -0.00025 2000 267.5534652008 325.00000104.691283248.724873 1.9345510.03326303 3.1386647 3.0342632 8.3 5.00.15 RATE 1.7725010 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.028 0.025 89 1.42 0.025 0 54537.5020080325_545416 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 12, 23:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org