IOTA/IOTA-ES occultation update for (5192) Yabuki / HIP 67955 event on 2009 Jan 05, 10:27 UT Visible from Summary ------- On 2009 Jan 05 UT, the 36 km diameter asteroid (5192) Yabuki will occult a 9.3 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.3 mag to 16.6 mag (the magnitude of the asteroid) for at most 1.7 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: 25 * date and approx. time of event: 2009 Jan 05, 10:23 - 2009 Jan 05, 10:27 UT * magnitude of target star: 9.3 * magnitude drop [mag]: 7.3 * estimated maximum duration [s]: 1.7 * Moon: 60 % sunlit, 161° distance * Sun: 80° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 39 * 1 sigma uncertainty interval [path widths]: +/- 2.73 * 1 sigma uncertainty interval [seconds]: +/- 6.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .054 +/- .040) * 1 sigma uncertainty ellipse (major, minor, PA): ( .058", .035", 115° ) * approx speed of asteroid's shadow [km/s]: 20.8070 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 67955 by 5192 Yabuki on 2009 Jan 5 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 -144 0 0 28 0 55 10 23 0 0 86 -79 27 50 15 28 11 35 .. .. .. 29 10 6 -143 0 0 28 4 56 10 23 0 1 86 -78 27 54 16 28 15 36 .. .. .. 29 14 6 -142 0 0 28 8 52 10 23 0 2 87 -77 27 58 12 28 19 32 .. .. .. 29 18 2 -141 0 0 28 12 43 10 23 0 3 87 -77 28 2 3 28 23 23 .. .. .. 29 21 52 -140 0 0 28 16 29 10 23 1 4 88 -76 28 5 50 28 27 8 .. .. .. 29 25 37 -139 0 0 28 20 9 10 23 1 4 88 -75 28 9 30 28 30 49 .. .. .. 29 29 18 -138 0 0 28 23 45 10 23 2 5 89 -74 28 13 6 28 34 25 27 15 13 29 32 53 -137 0 0 28 27 16 10 23 2 6 89 -73 28 16 37 28 37 55 27 18 44 29 36 23 -136 0 0 28 30 41 10 23 3 7 89 -72 28 20 2 28 41 20 27 22 9 29 39 47 -135 0 0 28 34 1 10 23 3 8 90 -71 28 23 22 28 44 40 27 25 30 29 43 7 -134 0 0 28 37 15 10 23 4 9 90 -71 28 26 36 28 47 54 27 28 45 29 46 21 -133 0 0 28 40 24 10 23 5 10 91 -70 28 29 45 28 51 3 27 31 54 29 49 29 -132 0 0 28 43 27 10 23 6 11 91 -69 28 32 49 28 54 7 27 34 58 29 52 32 -131 0 0 28 46 25 10 23 7 12 92 -68 28 35 47 28 57 4 27 37 56 29 55 29 -130 0 0 28 49 17 10 23 8 12 92 -67 28 38 39 28 59 57 27 40 49 29 58 21 -129 0 0 28 52 4 10 23 9 13 93 -66 28 41 26 29 2 43 27 43 36 30 1 7 -128 0 0 28 54 45 10 23 10 14 93 -65 28 44 7 29 5 24 27 46 17 30 3 48 -127 0 0 28 57 20 10 23 12 15 94 -64 28 46 42 29 7 59 27 48 53 30 6 22 -126 0 0 28 59 49 10 23 13 16 94 -64 28 49 11 29 10 28 27 51 23 30 8 51 -125 0 0 29 2 13 10 23 14 17 95 -63 28 51 35 29 12 51 27 53 46 30 11 14 -124 0 0 29 4 30 10 23 16 18 95 -62 28 53 52 29 15 9 27 56 4 30 13 31 -123 0 0 29 6 42 10 23 18 19 96 -61 28 56 4 29 17 21 27 58 16 30 15 43 -122 0 0 29 8 48 10 23 19 19 97 -60 28 58 10 29 19 26 28 0 22 30 17 48 -121 0 0 29 10 47 10 23 21 20 97 -59 29 0 10 29 21 26 28 2 22 30 19 47 -120 0 0 29 12 41 10 23 23 21 98 -58 29 2 3 29 23 19 28 4 16 30 21 40 -119 0 0 29 14 28 10 23 25 22 98 -57 29 3 51 29 25 7 28 6 4 30 23 27 -118 0 0 29 16 10 10 23 27 23 99 -57 29 5 32 29 26 48 28 7 46 30 25 9 -117 0 0 29 17 45 10 23 29 24 99 -56 29 7 8 29 28 23 28 9 22 30 26 43 -116 0 0 29 19 14 10 23 31 25 100 -55 29 8 37 29 29 52 28 10 51 30 28 12 -115 0 0 29 20 37 10 23 33 25 100 -54 29 10 0 29 31 15 28 12 14 30 29 35 -114 0 0 29 21 54 10 23 35 26 101 -53 29 11 16 29 32 32 28 13 31 30 30 51 -113 0 0 29 23 4 10 23 37 27 102 -52 29 12 27 29 33 42 28 14 42 30 32 1 -112 0 0 29 24 8 10 23 40 28 102 -51 29 13 31 29 34 46 28 15 46 30 33 5 -111 0 0 29 25 6 10 23 42 29 103 -50 29 14 29 29 35 44 28 16 44 30 34 3 -110 0 0 29 25 57 10 23 45 30 103 -50 29 15 20 29 36 35 28 17 36 30 34 54 -109 0 0 29 26 43 10 23 47 31 104 -49 29 16 6 29 37 21 28 18 21 30 35 39 -108 0 0 29 27 21 10 23 50 31 105 -48 29 16 44 29 37 59 28 19 0 30 36 18 -107 0 0 29 27 54 10 23 53 32 105 -47 29 17 17 29 38 32 28 19 33 30 36 50 -106 0 0 29 28 20 10 23 56 33 106 -46 29 17 43 29 38 58 28 19 59 30 37 16 -105 0 0 29 28 40 10 23 58 34 107 -45 29 18 3 29 39 18 28 20 19 30 37 36 -104 0 0 29 28 53 10 24 1 35 107 -44 29 18 16 29 39 31 28 20 32 30 37 49 -103 0 0 29 29 0 10 24 4 36 108 -43 29 18 23 29 39 38 28 20 39 30 37 56 -102 0 0 29 29 0 10 24 7 37 109 -43 29 18 23 29 39 38 28 20 40 30 37 56 -101 0 0 29 28 55 10 24 10 37 109 -42 29 18 18 29 39 32 28 20 34 30 37 50 -100 0 0 29 28 42 10 24 14 38 110 -41 29 18 5 29 39 20 28 20 22 30 37 38 - 99 0 0 29 28 23 10 24 17 39 111 -40 29 17 46 29 39 1 28 20 3 30 37 19 - 98 0 0 29 27 58 10 24 20 40 112 -39 29 17 21 29 38 36 28 19 38 30 36 54 - 97 0 0 29 27 27 10 24 23 41 112 -38 29 16 50 29 38 4 28 19 6 30 36 22 - 96 0 0 29 26 49 10 24 27 41 113 -37 29 16 12 29 37 26 28 18 28 30 35 44 - 95 0 0 29 26 4 10 24 30 42 114 -36 29 15 27 29 36 42 28 17 43 30 35 0 - 94 0 0 29 25 13 10 24 34 43 115 -35 29 14 36 29 35 51 28 16 52 30 34 9 - 93 0 0 29 24 16 10 24 37 44 116 -35 29 13 39 29 34 54 28 15 55 30 33 12 - 92 0 0 29 23 12 10 24 41 45 117 -34 29 12 35 29 33 50 28 14 51 30 32 9 - 91 0 0 29 22 2 10 24 45 46 117 -33 29 11 25 29 32 40 28 13 41 30 30 59 - 90 0 0 29 20 46 10 24 48 46 118 -32 29 10 9 29 31 24 28 12 24 30 29 43 - 89 0 0 29 19 23 10 24 52 47 119 -31 29 8 46 29 30 1 28 11 1 30 28 20 - 88 0 0 29 17 54 10 24 56 48 120 -30 29 7 17 29 28 32 28 9 32 30 26 51 - 87 0 0 29 16 19 10 25 0 49 121 -29 29 5 42 29 26 57 28 7 57 30 25 16 - 86 0 0 29 14 37 10 25 4 49 122 -28 29 4 0 29 25 15 28 6 15 30 23 35 - 85 0 0 29 12 49 10 25 8 50 123 -28 29 2 12 29 23 27 28 4 27 30 21 47 - 84 0 0 29 10 55 10 25 12 51 124 -27 29 0 18 29 21 33 28 2 32 30 19 53 - 83 0 0 29 8 55 10 25 16 52 125 -26 28 58 17 29 19 33 28 0 31 30 17 53 - 82 0 0 29 6 48 10 25 20 52 126 -25 28 56 11 29 17 27 27 58 25 30 15 47 - 81 0 0 29 4 35 10 25 24 53 128 -24 28 53 58 29 15 14 27 56 11 30 13 35 - 80 0 0 29 2 17 10 25 28 54 129 -23 28 51 39 29 12 55 27 53 52 30 11 16 - 79 0 0 28 59 52 10 25 32 55 130 -22 28 49 14 29 10 30 27 51 27 30 8 52 - 78 0 0 28 57 21 10 25 36 55 131 -21 28 46 43 29 7 59 27 48 56 30 6 21 - 77 0 0 28 54 44 10 25 41 56 133 -21 28 44 6 29 5 22 27 46 18 30 3 44 - 76 0 0 28 52 1 10 25 45 57 134 -20 28 41 23 29 2 39 27 43 35 30 1 2 - 75 0 0 28 49 12 10 25 49 57 135 -19 28 38 34 28 59 50 27 40 45 29 58 13 - 74 0 0 28 46 17 10 25 54 58 137 -18 28 35 39 28 56 56 27 37 50 29 55 19 - 73 0 0 28 43 16 10 25 58 59 138 -17 28 32 38 28 53 55 27 34 49 29 52 19 - 72 0 0 28 40 10 10 26 3 59 140 -16 28 29 31 28 50 49 27 31 42 29 49 12 - 71 0 0 28 36 57 10 26 7 60 142 -15 28 26 19 28 47 36 27 28 29 29 46 1 - 70 0 0 28 33 39 10 26 12 60 143 -15 28 23 1 28 44 18 27 25 11 29 42 43 - 69 0 0 28 30 16 10 26 16 61 145 -14 28 19 37 28 40 55 27 21 46 29 39 20 - 68 0 0 28 26 46 10 26 21 62 147 -13 28 16 8 28 37 26 27 18 17 29 35 51 - 67 0 0 28 23 11 10 26 26 62 149 -12 28 12 33 28 33 51 27 14 41 29 32 17 - 66 0 0 28 19 31 10 26 30 63 150 -11 28 8 53 28 30 11 27 11 0 29 28 37 - 65 0 0 28 15 45 10 26 35 63 152 -10 28 5 7 28 26 25 27 7 14 29 24 52 - 64 0 0 28 11 54 10 26 40 64 154 -9 28 1 15 28 22 34 27 3 22 29 21 1 - 63 0 0 28 7 58 10 26 44 64 157 -8 27 57 19 28 18 37 26 59 25 29 17 5 - 62 0 0 28 3 56 10 26 49 64 159 -8 27 53 17 28 14 36 26 55 23 29 13 4 - 61 0 0 27 59 49 10 26 54 65 161 -7 27 49 10 28 10 29 26 51 16 29 8 58 - 60 0 0 27 55 37 10 26 59 65 163 -6 27 44 58 28 6 17 26 47 3 29 4 46 - 59 0 0 27 51 20 10 27 3 65 166 -5 27 40 41 28 2 0 26 42 46 29 0 30 - 58 0 0 27 46 58 10 27 8 66 168 -4 27 36 19 27 57 38 26 38 23 28 56 8 - 57 0 0 27 42 31 10 27 13 66 170 -3 27 31 52 27 53 11 26 33 55 28 51 42 - 56 0 0 27 37 59 10 27 18 66 173 -2 27 27 20 27 48 39 26 29 23 28 47 11 - 55 0 0 27 33 23 10 27 23 66 175 -2 27 22 43 27 44 3 26 24 46 28 42 35 - 54 0 0 27 28 41 10 27 28 66 178 -1 27 18 2 27 39 22 26 20 4 28 37 54 Uncertainty in time = +/- 7 secs [Prediction of 2008 Nov 16.0] Data for the target star ------------------------ * name: HIP 67955 * constellation : Virgo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 13 54 59.2188 DE: +03 53 52.856 * position source: mpos:UCAC2 pm:UCAC2 plx:HIP2 * standard error: RA,DE ["]: ( .018, .020 ) * V mag [mag]: 9.3 * B mag [mag]: 10.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5192) Yabuki approx. diameter [km]: 36 approx. diameter ["]: .014 distance from Earth [AU]: 3.45300 * orbital information: orbit source: Preston date of fit: 2008 Apr 24 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 671 number of rejected observations: 18 time covered by the observations: 1963 Mar 28 - 2008 Mar 11 1 sigma uncertainty ellipse (major, minor, PA): 0.055, 0.029, 118° remarks: * orbital elements for (5192) Yabuki : Mean anomaly = 147.58702620 deg Arg. of pericenter = 304.50661664 deg Long. of node = 91.23664629 deg Inclination = 14.90081637 deg Eccentricity = 0.08386216 Semimajor axis = 3.19245566 AU Perihelion dist = 2.92472945 AU Mag: H = 10.58, G = 0.15 Epoch of elements : MJD 54836.43600000 TDT (2009 Jan 05.436) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jan 5 5192 Yabuki 10h 27.7m UT 9.3 13 54 59.219 3 53 52.86HIP 67955 10.2 16.6 36 1.7 3.453 1.992 -2.39 -53.3296 3.899 24.45 -22.57 10.4616 0.03309 0.39428 11.70636 -0.94045 -0.00549 0.00240 2000 146.47495420081230.00000304.506617 91.236646 14.9008160.08386216 3.1924557 2.924729410.4 5.00.15 RATE 1.7278930 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.058 0.035 115 3.73 0.039 0 54786.5020090105__67955 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 16, 16:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org