IOTA/IOTA-ES occultation update for (524) Fidelio / TYC 7396-00088-1 event on 2008 Mar 27, 14:21 UT Visible from SE Australia Summary ------- On 2008 Mar 27 UT, the 72 km diameter asteroid (524) Fidelio will occult a 11.0 mag star in the constellation Sagittarius for observers along a path across SE Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.4 mag to 15.3 mag (the magnitude of the asteroid) for at most 4.9 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: 81 * date and approx. time of event: 2008 Mar 27, 14:15 - 2008 Mar 27, 14:22 UT * midpoint of event [JD]: 2454553.0983625 * magnitude of target star: 11.0 * magnitude drop [mag]: 4.4 * estimated maximum duration [s]: 4.9 * Moon: 72 % sunlit, 22° distance * Sun: 94° distance * rough path description: SE Australia The occultation path -------------------- * approximate projected width [km]: 92 * 1 sigma uncertainty interval [path widths]: +/- 0.67 * 1 sigma uncertainty interval [seconds]: +/- 3.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .030", .024", 87° ) * approx speed of asteroid's shadow [km/s]: 14.6281 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7396-00088-1 by 524 Fidelio on 2008 Mar 27 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 129 0 0 -24 34 13 14 15 58 0 125 -62 -25 5 34 -24 3 8 -25 48 3 .. .. .. 130 0 0 -25 13 58 14 15 59 2 125 -62 -25 45 32 -24 42 42 -26 28 18 .. .. .. 131 0 0 -25 54 15 14 15 59 3 124 -62 -26 26 1 -25 22 46 -27 9 5 .. .. .. 132 0 0 -26 35 1 14 16 0 4 124 -62 -27 7 0 -26 3 21 -27 50 21 .. .. .. 133 0 0 -27 16 17 14 16 1 5 124 -62 -27 48 28 -26 44 24 -28 32 6 -26 2 8 134 0 0 -27 57 59 14 16 2 6 123 -62 -28 30 23 -27 25 54 -29 14 18 -26 43 23 135 0 0 -28 40 7 14 16 3 7 123 -62 -29 12 43 -28 7 50 -29 56 56 -27 25 3 136 0 0 -29 22 40 14 16 4 8 122 -61 -29 55 28 -28 50 10 -30 39 58 -28 7 8 137 0 0 -30 5 34 14 16 6 9 122 -61 -30 38 35 -29 32 53 -31 23 22 -28 49 35 138 0 0 -30 48 50 14 16 8 11 121 -61 -31 22 3 -30 15 57 -32 7 7 -29 32 24 139 0 0 -31 32 25 14 16 10 12 120 -60 -32 5 50 -30 59 20 -32 51 11 -30 15 31 140 0 0 -32 16 17 14 16 13 13 120 -60 -32 49 54 -31 43 0 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21 0 -40 34 53 154 0 0 -42 40 58 14 17 4 27 110 -50 -43 16 45 -42 5 36 -44 5 24 -41 18 48 155 0 0 -43 24 51 14 17 9 28 109 -49 -44 0 44 -42 49 24 -44 49 30 -42 2 30 156 0 0 -44 8 27 14 17 14 29 108 -48 -44 44 24 -43 32 55 -45 33 17 -42 45 55 157 0 0 -44 51 42 14 17 19 30 107 -47 -45 27 44 -44 16 6 -46 16 42 -43 29 1 158 0 0 -45 34 36 14 17 24 31 106 -46 -46 10 41 -44 58 56 -46 59 43 -44 11 47 159 0 0 -46 17 5 14 17 29 32 105 -45 -46 53 13 -45 41 23 -47 42 19 -44 54 11 160 0 0 -46 59 9 14 17 34 33 104 -45 -47 35 18 -46 23 25 -48 24 27 -45 36 10 161 0 0 -47 40 44 14 17 40 34 102 -44 -48 16 55 -47 4 59 -49 6 5 -46 17 43 162 0 0 -48 21 50 14 17 45 34 101 -43 -48 58 1 -47 46 5 -49 47 12 -46 58 48 163 0 0 -49 2 25 14 17 50 35 100 -42 -49 38 35 -48 26 39 -50 27 45 -47 39 23 164 0 0 -49 42 26 14 17 56 36 99 -41 -50 18 36 -49 6 42 -51 7 44 -48 19 27 165 0 0 -50 21 54 14 18 1 37 98 -40 -50 58 1 -49 46 12 -51 47 7 -48 58 59 166 0 0 -51 0 46 14 18 6 37 97 -39 -51 36 51 -50 25 6 -52 25 53 -49 37 56 167 0 0 -51 39 1 14 18 12 38 95 -38 -52 15 2 -51 3 24 -53 4 0 -50 16 18 168 0 0 -52 16 38 14 18 17 39 94 -38 -52 52 35 -51 41 5 -53 41 28 -50 54 4 169 0 0 -52 53 36 14 18 23 39 93 -37 -53 29 29 -52 18 8 -54 18 14 -51 31 13 170 0 0 -53 29 54 14 18 28 40 92 -36 -54 5 42 -52 54 31 -54 54 20 -52 7 43 171 0 0 -54 5 32 14 18 33 41 90 -35 -54 41 13 -53 30 14 -55 29 43 -52 43 34 172 0 0 -54 40 28 14 18 39 41 89 -34 -55 16 3 -54 5 17 -56 4 23 -53 18 45 173 0 0 -55 14 42 14 18 44 42 88 -34 -55 50 10 -54 39 39 -56 38 20 -53 53 15 174 0 0 -55 48 15 14 18 49 42 86 -33 -56 23 35 -55 13 18 -57 11 34 -54 27 5 175 0 0 -56 21 4 14 18 55 43 85 -32 -56 56 16 -55 46 16 -57 44 4 -55 0 13 176 0 0 -56 53 11 14 19 0 43 83 -31 -57 28 14 -56 18 32 -58 15 49 -55 32 39 177 0 0 -57 24 35 14 19 5 44 82 -30 -57 59 29 -56 50 5 -58 46 51 -56 4 24 178 0 0 -57 55 16 14 19 10 44 81 -30 -58 30 0 -57 20 55 -59 17 9 -56 35 27 179 0 0 -58 25 14 14 19 15 45 79 -29 -58 59 48 -57 51 3 -59 46 42 -57 5 47 180 0 0 -58 54 29 14 19 20 45 78 -28 -59 28 52 -58 20 28 -60 15 32 -57 35 26 -179 0 0 -59 23 2 14 19 25 46 76 -28 -59 57 14 -58 49 11 -60 43 39 -58 4 23 -178 0 0 -59 50 52 14 19 30 46 75 -27 -60 24 53 -59 17 13 -61 11 2 -58 32 38 -177 0 0 -60 18 0 14 19 35 46 73 -26 -60 51 50 -59 44 32 -61 37 43 -59 0 11 -176 0 0 -60 44 27 14 19 40 47 72 -26 -61 18 5 -60 11 10 -62 3 42 -59 27 4 -175 0 0 -61 10 12 14 19 44 47 70 -25 -61 43 38 -60 37 7 -62 28 58 -59 53 16 -174 0 0 -61 35 17 14 19 49 47 69 -24 -62 8 30 -61 2 23 -62 53 34 -60 18 48 -173 0 0 -61 59 41 14 19 54 48 67 -24 -62 32 43 -61 26 59 -63 17 29 -60 43 40 -172 0 0 -62 23 26 14 19 58 48 66 -23 -62 56 15 -61 50 56 -63 40 44 -61 7 52 -171 0 0 -62 46 32 14 20 3 48 64 -22 -63 19 8 -62 14 14 -64 3 20 -61 31 26 -170 0 0 -63 8 59 14 20 7 48 63 -22 -63 41 23 -62 36 54 -64 25 18 -61 54 21 -169 0 0 -63 30 49 14 20 11 49 61 -21 -64 3 0 -62 58 56 -64 46 37 -62 16 39 -168 0 0 -63 52 2 14 20 15 49 60 -21 -64 24 0 -63 20 21 -65 7 20 -62 38 20 -167 0 0 -64 12 38 14 20 20 49 58 -20 -64 44 24 -63 41 9 -65 27 26 -62 59 24 -166 0 0 -64 32 38 14 20 24 49 57 -20 -65 4 11 -64 1 22 -65 46 56 -63 19 53 -165 0 0 -64 52 3 14 20 28 49 55 -19 -65 23 24 -64 20 59 -66 5 52 -63 39 46 -164 0 0 -65 10 55 14 20 32 50 54 -18 -65 42 3 -64 40 2 -66 24 13 -63 59 5 -163 0 0 -65 29 12 14 20 36 50 52 -18 -66 0 8 -64 58 32 -66 42 1 -64 17 51 -162 0 0 -65 46 57 14 20 40 50 51 -17 -66 17 40 -65 16 29 -66 59 16 -64 36 3 -161 0 0 -66 4 9 14 20 43 50 49 -17 -66 34 40 -65 33 53 -67 16 0 -64 53 43 -160 0 0 -66 20 50 14 20 47 50 48 -16 -66 51 9 -65 50 46 -67 32 12 -65 10 51 -159 0 0 -66 37 0 14 20 51 50 46 -16 -67 7 7 -66 7 7 -67 47 54 -65 27 28 -158 0 0 -66 52 40 14 20 54 50 45 -15 -67 22 36 -66 22 59 -68 3 6 -65 43 34 -157 0 0 -67 7 51 14 20 58 50 43 -15 -67 37 35 -66 38 21 -68 17 49 -65 59 11 -156 0 0 -67 22 32 14 21 1 50 42 -15 -67 52 5 -66 53 14 -68 32 3 -66 14 18 -155 0 0 -67 36 46 14 21 5 51 40 -14 -68 6 7 -67 7 38 -68 45 50 -66 28 57 -154 0 0 -67 50 32 14 21 8 51 39 -14 -68 19 43 -67 21 36 -68 59 10 -66 43 9 -153 0 0 -68 3 52 14 21 12 51 37 -13 -68 32 51 -67 35 6 -69 12 4 -66 56 53 -152 0 0 -68 16 45 14 21 15 51 36 -13 -68 45 34 -67 48 9 -69 24 32 -67 10 10 -151 0 0 -68 29 13 14 21 18 51 34 -12 -68 57 51 -68 0 47 -69 36 35 -67 23 1 -150 0 0 -68 41 15 14 21 21 51 33 -12 -69 9 43 -68 13 0 -69 48 13 -67 35 27 -149 0 0 -68 52 53 14 21 25 51 31 -11 -69 21 12 -68 24 48 -69 59 27 -67 47 27 -148 0 0 -69 4 8 14 21 28 51 30 -11 -69 32 16 -68 36 11 -70 10 18 -67 59 4 -147 0 0 -69 14 59 14 21 31 51 28 -11 -69 42 57 -68 47 12 -70 20 47 -68 10 16 -146 0 0 -69 25 27 14 21 34 51 27 -10 -69 53 16 -68 57 49 -70 30 53 -68 21 5 -145 0 0 -69 35 32 14 21 37 51 25 -10 -70 3 13 -69 8 3 -70 40 37 -68 31 32 -144 0 0 -69 45 16 14 21 40 51 24 -10 -70 12 48 -69 17 56 -70 50 0 -68 41 35 -143 0 0 -69 54 39 14 21 43 51 23 -9 -70 22 2 -69 27 27 -70 59 2 -68 51 17 -142 0 0 -70 3 40 14 21 46 51 21 -9 -70 30 55 -69 36 37 -71 7 44 -69 0 38 -141 0 0 -70 12 22 14 21 48 51 20 -8 -70 39 28 -69 45 26 -71 16 6 -69 9 37 -140 0 0 -70 20 43 14 21 51 51 18 -8 -70 47 42 -69 53 55 -71 24 9 -69 18 16 -139 0 0 -70 28 44 14 21 54 51 17 -8 -70 55 36 -70 2 4 -71 31 52 -69 26 35 -138 0 0 -70 36 27 14 21 57 51 15 -7 -71 3 11 -70 9 53 -71 39 17 -69 34 34 -137 0 0 -70 43 50 14 21 59 51 14 -7 -71 10 27 -70 17 23 -71 46 24 -69 42 13 -136 0 0 -70 50 55 14 22 2 51 13 -7 -71 17 25 -70 24 35 -71 53 13 -69 49 34 -135 0 0 -70 57 42 14 22 5 51 11 -6 -71 24 5 -70 31 28 -71 59 44 -69 56 35 -134 0 0 -71 4 11 14 22 7 51 10 -6 -71 30 28 -70 38 4 -72 5 58 -70 3 19 -133 0 0 -71 10 22 14 22 10 51 9 -6 -71 36 33 -70 44 21 -72 11 55 -70 9 44 -132 0 0 -71 16 17 14 22 13 50 7 -5 -71 42 22 -70 50 21 -72 17 36 -70 15 52 -131 0 0 -71 21 54 14 22 15 50 6 -5 -71 47 54 -70 56 4 -72 23 0 -70 21 42 -130 0 0 -71 27 15 14 22 18 50 4 -5 -71 53 9 -71 1 30 -72 28 8 -70 27 15 -129 0 0 -71 32 19 14 22 20 50 3 -4 -71 58 9 -71 6 39 -72 33 0 -70 32 30 -128 0 0 -71 37 7 14 22 23 50 2 -4 -72 2 52 -71 11 32 -72 37 37 -70 37 30 -127 0 0 -71 41 40 14 22 25 50 0 -4 -72 7 20 -71 16 9 -72 41 59 -70 42 13 -126 0 0 -71 45 57 14 22 28 50 359 -3 -72 11 32 -71 20 30 -72 46 5 -70 46 39 -125 0 0 -71 49 58 14 22 30 50 358 -3 -72 15 30 -71 24 36 -72 49 57 -70 50 50 -124 0 0 -71 53 44 14 22 32 50 356 -3 -72 19 12 -71 28 25 -72 53 34 -70 54 44 -123 0 0 -71 57 15 14 22 35 50 355 -2 -72 22 39 -71 32 0 -72 56 56 -70 58 24 -122 0 0 -72 0 31 14 22 37 50 354 -2 -72 25 52 -71 35 19 -73 0 5 -71 1 47 -121 0 0 -72 3 32 14 22 40 50 352 -2 -72 28 50 -71 38 24 -73 2 59 -71 4 56 -120 0 0 -72 6 19 14 22 42 50 351 -1 -72 31 34 -71 41 13 -73 5 39 -71 7 49 -119 0 0 -72 8 51 14 22 44 50 350 -1 -72 34 4 -71 43 48 -73 8 5 -71 10 27 -118 0 0 -72 11 9 14 22 47 49 348 -1 -72 36 19 -71 46 8 -73 10 17 -71 12 50 -117 0 0 -72 13 13 14 22 49 49 347 0 -72 38 21 -71 48 14 -73 12 16 -71 14 59 -116 0 0 -72 15 3 14 22 51 49 346 0 -72 40 9 -71 50 6 -73 14 1 -71 16 53 Uncertainty in time = +/- 4 secs [Prediction of 2008 Feb 14.0] Data for the target star ------------------------ * name: TYC 7396-00088-1 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 18 16 31.2698 DE: -31 58 18.339 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .022 ) * V mag [mag]: 11.0 * B mag [mag]: 12.0 * Apparent position with proper motion RA(deg): 274.2677024776 DE(deg): -31.9696991805 * Equation of equinoxes (radians) : 0.000040731013344 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (524) Fidelio approx. diameter [km]: 72 approx. diameter ["]: .037 distance from Earth [AU]: 2.69000 * orbital information: orbit source: Preston date of fit: 2008 Feb 13 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 798 number of rejected observations: 82 time covered by the observations: 1904 Mar 15 - 2007 Aug 07 1 sigma uncertainty ellipse (major, minor, PA): 0.017, 0.011, 82° remarks: * orbital elements for (524) Fidelio : Mean anomaly = 214.48720866 deg Arg. of pericenter = 79.31292822 deg Long. of node = 326.80303867 deg Inclination = 8.22287349 deg Eccentricity = 0.12805558 Semimajor axis = 2.63616057 AU Perihelion dist = 2.29858549 AU Mag: H = 9.81, G = 0.15 Epoch of elements : MJD 54552.59800000 TDT (2008 Mar 27.598) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Mar 27 524 Fidelio 14h 21.6m UT 11.0 18 16 31.270-31 58 18.34TYC 7396-00088-1 12.0 15.3 72 4.9 2.690 2.089 -4.66 -126.6667 -31.971 -34.10 2.90 14.3607 -0.10684 -0.61717 8.13255 -1.42538 -0.00578 -0.00011 2000 213.8889552008 325.00000 79.312928326.803039 8.2228730.12805558 2.6361606 2.2985855 9.8 5.00.15 RATE 2.3027480 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.030 0.024 87 1.67 0.025 0 54510.5020080327_0088-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Feb 14, 19:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org