IOTA/IOTA-ES occultation update for (6326) Idamiyoshi / 2UCAC 32013739 event on 2008 Jan 05, 05:44 UT Visible from Venezuela/Colombia Summary ------- On 2008 Jan 05 UT, the 12 km diameter asteroid (6326) Idamiyoshi will occult a 10.5 mag star in the constellation Canis Minor for observers along a path across Venezuela/Colombia. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.2 mag to 15.7 mag (the magnitude of the asteroid) for at most 1.3 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: 7 * date and approx. time of event: 2008 Jan 05, 05:33 - 2008 Jan 05, 05:55 UT * magnitude of target star: 10.5 * magnitude drop [mag]: 5.2 * estimated maximum duration [s]: 1.3 * Moon: 10 % sunlit, 129° distance * Sun: 157° distance * rough path description: Venezuela/Colombia The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 8.73 * 1 sigma uncertainty interval [seconds]: +/- 17.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .160 +/- .105) * 1 sigma uncertainty ellipse (major, minor, PA): ( .161", .104", 97° ) * approx speed of asteroid's shadow [km/s]: 9.4138 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 32013739 by 6326 Idamiyoshi on 2008 Jan 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 -172 0 0 6 50 56 5 55 47 1 90 -8 6 54 12 6 47 39 7 51 23 .. .. .. -171 0 0 6 51 30 5 55 47 2 90 -9 6 54 46 6 48 13 7 51 57 .. .. .. -170 0 0 6 52 2 5 55 47 3 90 -10 6 55 19 6 48 46 7 52 29 5 51 41 -169 0 0 6 52 34 5 55 46 4 90 -11 6 55 50 6 49 17 7 53 1 5 52 13 -168 0 0 6 53 4 5 55 45 5 90 -12 6 56 20 6 49 48 7 53 31 5 52 43 -167 0 0 6 53 33 5 55 44 6 90 -12 6 56 49 6 50 17 7 54 0 5 53 12 -166 0 0 6 54 1 5 55 43 7 90 -13 6 57 17 6 50 44 7 54 28 5 53 40 -165 0 0 6 54 27 5 55 41 8 90 -14 6 57 43 6 51 11 7 54 54 5 54 6 -164 0 0 6 54 52 5 55 40 9 90 -15 6 58 9 6 51 36 7 55 19 5 54 31 -163 0 0 6 55 16 5 55 38 10 91 -16 6 58 32 6 52 0 7 55 43 5 54 55 -162 0 0 6 55 39 5 55 36 11 91 -17 6 58 55 6 52 22 7 56 6 5 55 18 -161 0 0 6 56 0 5 55 33 12 91 -18 6 59 16 6 52 44 7 56 27 5 55 39 -160 0 0 6 56 20 5 55 31 13 91 -19 6 59 36 6 53 4 7 56 47 5 55 59 -159 0 0 6 56 39 5 55 28 14 91 -20 6 59 55 6 53 22 7 57 6 5 56 18 -158 0 0 6 56 56 5 55 25 15 91 -21 7 0 12 6 53 40 7 57 23 5 56 35 -157 0 0 6 57 12 5 55 22 16 91 -22 7 0 29 6 53 56 7 57 39 5 56 51 -156 0 0 6 57 27 5 55 19 17 91 -23 7 0 43 6 54 11 7 57 54 5 57 6 -155 0 0 6 57 41 5 55 16 18 92 -23 7 0 57 6 54 24 7 58 8 5 57 20 -154 0 0 6 57 53 5 55 12 19 92 -24 7 1 9 6 54 36 7 58 20 5 57 32 -153 0 0 6 58 4 5 55 8 20 92 -25 7 1 20 6 54 47 7 58 31 5 57 43 -152 0 0 6 58 13 5 55 4 21 92 -26 7 1 29 6 54 57 7 58 40 5 57 52 -151 0 0 6 58 21 5 55 0 22 92 -27 7 1 38 6 55 5 7 58 49 5 58 1 -150 0 0 6 58 28 5 54 56 23 92 -28 7 1 45 6 55 12 7 58 56 5 58 8 -149 0 0 6 58 34 5 54 51 23 92 -29 7 1 50 6 55 18 7 59 1 5 58 13 -148 0 0 6 58 39 5 54 46 24 93 -30 7 1 55 6 55 22 7 59 6 5 58 18 -147 0 0 6 58 42 5 54 42 25 93 -31 7 1 58 6 55 25 7 59 9 5 58 21 -146 0 0 6 58 43 5 54 36 26 93 -32 7 2 0 6 55 27 7 59 11 5 58 23 -145 0 0 6 58 44 5 54 31 27 93 -32 7 2 0 6 55 28 7 59 11 5 58 23 -144 0 0 6 58 43 5 54 26 28 93 -33 7 1 59 6 55 27 7 59 10 5 58 22 -143 0 0 6 58 41 5 54 20 29 93 -34 7 1 57 6 55 25 7 59 8 5 58 20 -142 0 0 6 58 38 5 54 15 30 93 -35 7 1 54 6 55 21 7 59 5 5 58 17 -141 0 0 6 58 33 5 54 9 31 94 -36 7 1 49 6 55 17 7 59 0 5 58 12 -140 0 0 6 58 27 5 54 3 32 94 -37 7 1 43 6 55 11 7 58 54 5 58 6 -139 0 0 6 58 20 5 53 56 33 94 -38 7 1 36 6 55 4 7 58 47 5 57 59 -138 0 0 6 58 11 5 53 50 34 94 -39 7 1 28 6 54 55 7 58 39 5 57 51 -137 0 0 6 58 2 5 53 44 35 94 -40 7 1 18 6 54 45 7 58 29 5 57 41 -136 0 0 6 57 51 5 53 37 36 94 -40 7 1 7 6 54 34 7 58 18 5 57 30 -135 0 0 6 57 39 5 53 30 37 95 -41 7 0 55 6 54 22 7 58 6 5 57 18 -134 0 0 6 57 25 5 53 23 38 95 -42 7 0 41 6 54 9 7 57 52 5 57 4 -133 0 0 6 57 10 5 53 16 39 95 -43 7 0 27 6 53 54 7 57 38 5 56 49 -132 0 0 6 56 54 5 53 9 40 95 -44 7 0 11 6 53 38 7 57 22 5 56 33 -131 0 0 6 56 37 5 53 1 41 95 -45 6 59 54 6 53 21 7 57 5 5 56 16 -130 0 0 6 56 19 5 52 54 42 95 -46 6 59 35 6 53 3 7 56 46 5 55 58 -129 0 0 6 55 59 5 52 46 43 96 -47 6 59 16 6 52 43 7 56 27 5 55 38 -128 0 0 6 55 39 5 52 38 44 96 -47 6 58 55 6 52 22 7 56 6 5 55 18 -127 0 0 6 55 17 5 52 30 45 96 -48 6 58 33 6 52 0 7 55 44 5 54 56 -126 0 0 6 54 53 5 52 22 46 96 -49 6 58 10 6 51 37 7 55 21 5 54 32 -125 0 0 6 54 29 5 52 14 47 96 -50 6 57 45 6 51 13 7 54 56 5 54 8 -124 0 0 6 54 4 5 52 6 48 97 -51 6 57 20 6 50 47 7 54 31 5 53 43 -123 0 0 6 53 37 5 51 57 48 97 -52 6 56 53 6 50 21 7 54 4 5 53 16 -122 0 0 6 53 9 5 51 49 49 97 -53 6 56 25 6 49 53 7 53 36 5 52 48 -121 0 0 6 52 40 5 51 40 50 97 -53 6 55 56 6 49 24 7 53 8 5 52 19 -120 0 0 6 52 10 5 51 31 51 98 -54 6 55 26 6 48 54 7 52 37 5 51 49 -119 0 0 6 51 39 5 51 22 52 98 -55 6 54 55 6 48 23 7 52 6 5 51 18 -118 0 0 6 51 7 5 51 13 53 98 -56 6 54 23 6 47 50 7 51 34 5 50 45 -117 0 0 6 50 33 5 51 4 54 99 -57 6 53 49 6 47 17 7 51 1 5 50 12 -116 0 0 6 49 59 5 50 55 55 99 -57 6 53 15 6 46 42 7 50 26 5 49 37 -115 0 0 6 49 23 5 50 45 56 99 -58 6 52 39 6 46 7 7 49 51 5 49 2 -114 0 0 6 48 46 5 50 36 57 99 -59 6 52 3 6 45 30 7 49 14 5 48 25 -113 0 0 6 48 9 5 50 26 58 100 -60 6 51 25 6 44 52 7 48 36 5 47 47 -112 0 0 6 47 30 5 50 17 59 100 -61 6 50 46 6 44 14 7 47 57 5 47 9 -111 0 0 6 46 50 5 50 7 60 101 -61 6 50 6 6 43 34 7 47 18 5 46 29 -110 0 0 6 46 9 5 49 57 61 101 -62 6 49 26 6 42 53 7 46 37 5 45 48 -109 0 0 6 45 28 5 49 47 62 101 -63 6 48 44 6 42 11 7 45 55 5 45 6 -108 0 0 6 44 45 5 49 37 63 102 -64 6 48 1 6 41 28 7 45 12 5 44 23 -107 0 0 6 44 1 5 49 27 64 102 -64 6 47 17 6 40 45 7 44 29 5 43 40 -106 0 0 6 43 16 5 49 17 65 103 -65 6 46 33 6 40 0 7 43 44 5 42 55 -105 0 0 6 42 30 5 49 7 65 103 -66 6 45 47 6 39 14 7 42 58 5 42 9 -104 0 0 6 41 44 5 48 56 66 104 -66 6 45 0 6 38 28 7 42 11 5 41 23 -103 0 0 6 40 56 5 48 46 67 105 -67 6 44 13 6 37 40 7 41 24 5 40 35 -102 0 0 6 40 8 5 48 36 68 105 -68 6 43 24 6 36 51 7 40 35 5 39 46 -101 0 0 6 39 18 5 48 25 69 106 -68 6 42 35 6 36 2 7 39 46 5 38 57 -100 0 0 6 38 28 5 48 15 70 107 -69 6 41 44 6 35 12 7 38 56 5 38 7 - 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Data for the target star ------------------------ * name: 2UCAC 32013739 * constellation : Canis Minor * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 20 54.0359 DE: +00 34 45.125 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .062, .062 ) * V mag [mag]: 10.5 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (6326) Idamiyoshi approx. diameter [km]: 12 approx. diameter ["]: .012 distance from Earth [AU]: 1.39800 * orbital information: orbit source: Preston date of fit: 2008 Jan 02 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 597 number of rejected observations: 5 time covered by the observations: 1978 Apr 11 - 2007 Dec 14 1 sigma uncertainty ellipse (major, minor, PA): 0.149, 0.084, 98° remarks: * orbital elements for (6326) Idamiyoshi : Mean anomaly = 350.34918429 deg Arg. of pericenter = 281.48877890 deg Long. of node = 199.69025035 deg Inclination = 12.58147799 deg Eccentricity = 0.13116959 Semimajor axis = 2.68188833 AU Perihelion dist = 2.33010614 AU Mag: H = 12.53, G = 0.15 Epoch of elements : MJD 54470.23900000 TDT (2008 Jan 05.239) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jan 05 6326 Idamiyoshi 5h 44.6m UT 10.5 7 20 54.036 0 34 45.132UCAC 32013739 0.0 15.7 12 1.3 1.398 -2.228 0.64 -80.122 0.579 95.13 -22.68 5.7426 .00195 .09945 -5.31249 0.10031 -0.00047 0.00218 2000 348.05144520071226.00000281.488779199.690250 12.5814780.131169592.681888332.3301061412.55 0.15 RATE 2.2441040 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.161 0.104 96.8 9.730 0.103 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 02, 23:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org