IOTA/IOTA-ES occultation update for (37) Fides / TYC 1916-00059-1 event on 2007 Feb 05, 02:18 UT Visible from S Europe, E Canada, W USA Summary ------- On 2007 Feb 05 UT, the 108 km diameter asteroid (37) Fides will occult a 10.6 mag star in the constellation Gemini for observers along a path across S Europe, E Canada, W USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.7 mag to 10.4 mag (the magnitude of the asteroid) for at most 14.9 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Ron Stone, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 99 * date and approx. time of event: 2007 Feb 05, 02:05 - 2007 Feb 05, 02:31 UT * magnitude of target star: 10.6 * magnitude drop [mag]: 0.7 * estimated maximum duration [s]: 14.9 * Moon: 92 % sunlit, 56° distance * Sun: 157° distance * rough path description: S Europe, E Canada, W USA The occultation path -------------------- * approximate projected width [km]: 120 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 3.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .029 +/- .026) * 1 sigma uncertainty ellipse (major, minor, PA): ( .029", .026", 98° ) * approx speed of asteroid's shadow [km/s]: 7.2661 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1916-00059-1 by 37 Fides on 2007 Feb 05 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 -159 0 0 23 37 29 2 31 57 0 62 23 24 14 14 23 0 57 24 31 57 .. .. .. -158 0 0 24 7 43 2 31 57 1 62 22 24 44 29 23 31 9 25 2 12 .. .. .. -157 0 0 24 37 54 2 31 56 2 62 21 25 14 41 24 1 19 25 32 25 23 43 49 -156 0 0 25 8 2 2 31 55 3 63 20 25 44 51 24 31 26 26 2 35 24 13 56 -155 0 0 25 38 6 2 31 54 4 63 19 26 14 56 25 1 29 26 32 41 24 43 59 -154 0 0 26 8 6 2 31 53 5 64 18 26 44 56 25 31 28 27 2 41 25 13 57 -153 0 0 26 37 59 2 31 51 6 64 17 27 14 50 26 1 21 27 32 36 25 43 50 -152 0 0 27 7 47 2 31 49 8 64 16 27 44 38 26 31 8 28 2 24 26 13 37 -151 0 0 27 37 27 2 31 46 9 65 15 28 14 19 27 0 48 28 32 5 26 43 17 -150 0 0 28 7 0 2 31 44 10 65 14 28 43 51 27 30 21 29 1 37 27 12 49 -149 0 0 28 36 23 2 31 41 11 66 13 29 13 15 27 59 44 29 31 1 27 42 13 -148 0 0 29 5 38 2 31 37 11 66 12 29 42 29 28 28 59 30 0 15 28 11 28 -147 0 0 29 34 42 2 31 34 12 67 11 30 11 32 28 58 4 30 29 18 28 40 33 -146 0 0 30 3 35 2 31 30 13 67 10 30 40 25 29 26 58 30 58 10 29 9 27 -145 0 0 30 32 17 2 31 26 14 68 9 31 9 6 29 55 41 31 26 51 29 38 10 -144 0 0 31 0 47 2 31 22 15 68 8 31 37 35 30 24 11 31 55 20 30 6 42 -143 0 0 31 29 4 2 31 17 16 69 7 32 5 51 30 52 30 32 23 35 30 35 1 -142 0 0 31 57 8 2 31 13 17 70 6 32 33 54 31 20 35 32 51 37 31 3 6 -141 0 0 32 24 58 2 31 8 18 70 5 33 1 42 31 48 26 33 19 25 31 30 59 -140 0 0 32 52 33 2 31 2 19 71 4 33 29 16 32 16 3 33 46 58 31 58 37 -139 0 0 33 19 54 2 30 57 20 71 3 33 56 35 32 43 26 34 14 16 32 26 0 -138 0 0 33 46 59 2 30 51 21 72 2 34 23 38 33 10 33 34 41 18 32 53 8 -137 0 0 34 13 48 2 30 46 22 73 1 34 50 25 33 37 24 35 8 4 33 20 0 -136 0 0 34 40 21 2 30 40 23 73 0 35 16 55 34 3 59 35 34 33 33 46 36 -135 0 0 35 6 37 2 30 34 24 74 -1 35 43 9 34 30 17 36 0 45 34 12 55 -134 0 0 35 32 35 2 30 27 25 74 -1 36 9 5 34 56 18 36 26 40 34 38 58 -133 0 0 35 58 16 2 30 21 25 75 -2 36 34 43 35 22 2 36 52 17 35 4 43 -132 0 0 36 23 39 2 30 14 26 76 -3 37 0 3 35 47 28 37 17 36 35 30 10 -131 0 0 36 48 44 2 30 7 27 76 -4 37 25 5 36 12 35 37 42 37 35 55 18 -130 0 0 37 13 30 2 30 0 28 77 -5 37 49 48 36 37 24 38 7 18 36 20 9 -129 0 0 37 37 57 2 29 53 29 78 -6 38 14 12 37 1 54 38 31 40 36 44 40 -128 0 0 38 2 5 2 29 46 30 79 -7 38 38 16 37 26 5 38 55 43 37 8 53 -127 0 0 38 25 53 2 29 39 30 79 -8 39 2 1 37 49 57 39 19 26 37 32 46 -126 0 0 38 49 21 2 29 31 31 80 -8 39 25 26 38 13 28 39 42 50 37 56 19 -125 0 0 39 12 30 2 29 24 32 81 -9 39 48 31 38 36 40 40 5 53 38 19 33 -124 0 0 39 35 18 2 29 16 33 82 -10 40 11 15 38 59 32 40 28 36 38 42 26 -123 0 0 39 57 46 2 29 8 34 82 -11 40 33 40 39 22 3 40 50 58 39 4 59 -122 0 0 40 19 53 2 29 0 34 83 -12 40 55 43 39 44 14 41 13 0 39 27 12 -121 0 0 40 41 39 2 28 52 35 84 -12 41 17 26 40 6 5 41 34 40 39 49 4 -120 0 0 41 3 5 2 28 44 36 85 -13 41 38 48 40 27 35 41 56 0 40 10 36 -119 0 0 41 24 10 2 28 36 37 86 -14 41 59 49 40 48 43 42 16 59 40 31 47 -118 0 0 41 44 54 2 28 28 37 87 -15 42 20 28 41 9 31 42 37 37 40 52 36 -117 0 0 42 5 17 2 28 19 38 87 -15 42 40 47 41 29 58 42 57 54 41 13 5 -116 0 0 42 25 18 2 28 11 39 88 -16 43 0 44 41 50 3 43 17 49 41 33 12 -115 0 0 42 44 58 2 28 2 40 89 -17 43 20 20 42 9 48 43 37 23 41 52 59 -114 0 0 43 4 17 2 27 54 40 90 -18 43 39 35 42 29 11 43 56 36 42 12 24 -113 0 0 43 23 15 2 27 45 41 91 -18 43 58 29 42 48 13 44 15 27 42 31 28 -112 0 0 43 41 51 2 27 37 42 92 -19 44 17 1 43 6 53 44 33 57 42 50 10 -111 0 0 44 0 6 2 27 28 42 93 -20 44 35 11 43 25 13 44 52 6 43 8 32 -110 0 0 44 18 0 2 27 19 43 94 -21 44 53 1 43 43 11 45 9 53 43 26 31 -109 0 0 44 35 32 2 27 10 44 95 -21 45 10 29 44 0 47 45 27 19 43 44 10 -108 0 0 44 52 43 2 27 2 44 96 -22 45 27 36 44 18 2 45 44 24 44 1 27 -107 0 0 45 9 33 2 26 53 45 97 -23 45 44 21 44 34 57 46 1 7 44 18 23 -106 0 0 45 26 2 2 26 44 46 98 -23 46 0 45 44 51 29 46 17 29 44 34 58 -105 0 0 45 42 9 2 26 35 46 99 -24 46 16 48 45 7 41 46 33 30 44 51 12 -104 0 0 45 57 55 2 26 26 47 100 -25 46 32 30 45 23 31 46 49 10 45 7 4 -103 0 0 46 13 20 2 26 17 48 101 -25 46 47 51 45 39 1 47 4 29 45 22 36 -102 0 0 46 28 25 2 26 8 48 102 -26 47 2 51 45 54 9 47 19 27 45 37 46 -101 0 0 46 43 8 2 25 59 49 104 -27 47 17 30 46 8 56 47 34 3 45 52 35 -100 0 0 46 57 30 2 25 50 49 105 -27 47 31 48 46 23 23 47 48 20 46 7 4 - 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Data for the target star ------------------------ * name: TYC 1916-00059-1 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 42 33.8033 DE: +26 06 43.902 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .016, .023 ) * V mag [mag]: 10.6 * B mag [mag]: 11.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (37) Fides approx. diameter [km]: 108 approx. diameter ["]: .109 distance from Earth [AU]: 1.37100 * orbital information: orbit source: Preston date of fit: 2007 Jan 25 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1165 number of rejected observations: 148 time covered by the observations: 1900 Feb 24 - 2007 Jan 07 1 sigma uncertainty ellipse (major, minor, PA): 0.025, 0.013, 101° remarks: * orbital elements for (37) Fides : Mean anomaly = 37.60823757 deg Arg. of pericenter = 62.67830353 deg Long. of node = 7.40862310 deg Inclination = 3.07326665 deg Eccentricity = 0.17660277 Semimajor axis = 2.64118930 AU Perihelion dist = 2.17474795 AU Mag: H = 7.37, G = 0.24 Epoch of elements : MJD 54136.09600000 TDT (2007 Feb 05.096) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Feb 05 37 Fides 2h 18.8m UT 10.6 7 42 33.803 26 6 43.90TYC 1916-00059-1 11.0 10.4 108 14.9 1.371 -1.951 0.15 -53.919 26.113 148.79 -16.07 2.3133 .00210 .43551 -4.10111 0.02439 0.00209 -0.00080 2000 36.20849032007 130.00000 62.678304 7.408623 3.0732670.176602772.641189302.174747957.295 0.24 RATE 2.2961739 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.029 0.026 97.9 1.240 0.026 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Jan 26, 07:32 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org