IOTA/IOTA-ES occultation update for (4266) Waltari / TYC 0846-01318-1 event on 2009 Nov 03, 18:54 UT Visible from Summary ------- On 2009 Nov 03 UT, the 24 km diameter asteroid (4266) Waltari will occult a 9.8 mag star in the constellation Leo 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 17.1 mag (the magnitude of the asteroid) for at most 0.7 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: 20 * date and approx. time of event: 2009 Nov 03, 18:51 - 2009 Nov 03, 18:53 UT * magnitude of target star: 9.8 * magnitude drop [mag]: 7.3 * estimated maximum duration [s]: 0.7 * Moon: 98 % sunlit, 106° distance * Sun: 60° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 3.36 * 1 sigma uncertainty interval [seconds]: +/- 4.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .057 +/- .048) * 1 sigma uncertainty ellipse (major, minor, PA): ( .065", .037", 125° ) * approx speed of asteroid's shadow [km/s]: 32.4857 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0846-01318-1 by 4266 Waltari on 2009 Nov 3 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 100 0 0 44 56 58 18 51 42 1 80 -53 44 50 12 45 3 43 44 4 51 45 49 15 101 0 0 45 4 20 18 51 42 1 81 -52 44 57 35 45 11 5 44 12 19 45 56 33 102 0 0 45 11 18 18 51 42 2 81 -51 45 4 33 45 18 2 44 19 21 46 3 25 103 0 0 45 17 49 18 51 42 3 82 -51 45 11 6 45 24 33 44 25 57 46 9 52 104 0 0 45 23 56 18 51 43 3 83 -50 45 17 13 45 30 39 44 32 8 46 15 54 105 0 0 45 29 37 18 51 43 4 84 -50 45 22 54 45 36 20 44 37 53 46 21 31 106 0 0 45 34 53 18 51 43 5 84 -49 45 28 11 45 41 35 44 43 13 46 26 43 107 0 0 45 39 44 18 51 43 6 85 -48 45 33 2 45 46 26 44 48 8 46 31 31 108 0 0 45 44 10 18 51 43 6 86 -48 45 37 29 45 50 51 44 52 37 46 35 54 109 0 0 45 48 11 18 51 44 7 86 -47 45 41 30 45 54 52 44 56 41 46 39 52 110 0 0 45 51 48 18 51 44 8 87 -47 45 45 7 45 58 28 45 0 20 46 43 25 111 0 0 45 54 59 18 51 44 8 88 -46 45 48 19 46 1 40 45 3 34 46 46 35 112 0 0 45 57 46 18 51 45 9 89 -45 45 51 6 46 4 26 45 6 23 46 49 19 113 0 0 46 0 8 18 51 45 10 89 -45 45 53 29 46 6 48 45 8 47 46 51 40 114 0 0 46 2 6 18 51 46 11 90 -44 45 55 27 46 8 46 45 10 47 46 53 36 115 0 0 46 3 39 18 51 46 11 91 -43 45 57 0 46 10 19 45 12 21 46 55 8 116 0 0 46 4 48 18 51 47 12 92 -43 45 58 9 46 11 27 45 13 30 46 56 16 117 0 0 46 5 32 18 51 47 13 92 -42 45 58 53 46 12 11 45 14 15 46 56 59 118 0 0 46 5 52 18 51 48 13 93 -41 45 59 13 46 12 31 45 14 35 46 57 19 119 0 0 46 5 47 18 51 48 14 94 -41 45 59 8 46 12 26 45 14 30 46 57 14 120 0 0 46 5 17 18 51 49 15 94 -40 45 58 38 46 11 57 45 14 1 46 56 45 121 0 0 46 4 24 18 51 49 15 95 -40 45 57 44 46 11 3 45 13 6 46 55 51 122 0 0 46 3 5 18 51 50 16 96 -39 45 56 26 46 9 45 45 11 47 46 54 34 123 0 0 46 1 22 18 51 51 17 97 -38 45 54 42 46 8 2 45 10 2 46 52 52 124 0 0 45 59 14 18 51 52 17 97 -38 45 52 34 46 5 54 45 7 53 46 50 46 125 0 0 45 56 42 18 51 52 18 98 -37 45 50 2 46 3 22 45 5 19 46 48 15 126 0 0 45 53 44 18 51 53 19 99 -36 45 47 4 46 0 25 45 2 19 46 45 20 127 0 0 45 50 22 18 51 54 20 100 -36 45 43 42 45 57 3 44 58 55 46 42 0 128 0 0 45 46 35 18 51 55 20 100 -35 45 39 54 45 53 16 44 55 5 46 38 16 129 0 0 45 42 23 18 51 56 21 101 -34 45 35 42 45 49 5 44 50 50 46 34 7 130 0 0 45 37 46 18 51 57 22 102 -34 45 31 5 45 44 28 44 46 10 46 29 33 131 0 0 45 32 44 18 51 57 22 103 -33 45 26 2 45 39 26 44 41 4 46 24 34 132 0 0 45 27 16 18 51 58 23 103 -32 45 20 34 45 33 59 44 35 33 46 19 10 133 0 0 45 21 23 18 51 59 24 104 -32 45 14 40 45 28 6 44 29 35 46 13 22 134 0 0 45 15 4 18 52 0 24 105 -31 45 8 21 45 21 48 44 23 12 46 7 7 135 0 0 45 8 20 18 52 2 25 105 -30 45 1 36 45 15 5 44 16 23 46 0 28 136 0 0 45 1 10 18 52 3 26 106 -30 44 54 25 45 7 55 44 9 8 45 53 23 137 0 0 44 53 34 18 52 4 27 107 -29 44 46 48 45 0 20 44 1 26 45 45 52 138 0 0 44 45 31 18 52 5 27 108 -28 44 38 45 44 52 18 43 53 18 45 37 55 139 0 0 44 37 3 18 52 6 28 108 -28 44 30 15 44 43 50 43 44 44 45 29 32 140 0 0 44 28 7 18 52 7 29 109 -27 44 21 19 44 34 56 43 35 43 45 20 43 141 0 0 44 18 45 18 52 9 30 110 -26 44 11 57 44 25 34 43 26 14 45 11 28 142 0 0 44 8 57 18 52 10 30 111 -25 44 2 7 44 15 47 43 16 19 45 1 46 143 0 0 43 58 41 18 52 11 31 111 -25 43 51 50 44 5 32 43 5 56 44 51 37 144 0 0 43 47 58 18 52 13 32 112 -24 43 41 6 43 54 50 42 55 6 44 41 1 145 0 0 43 36 47 18 52 14 33 113 -23 43 29 55 43 43 40 42 43 48 44 29 58 146 0 0 43 25 9 18 52 15 33 114 -23 43 18 16 43 32 3 42 32 2 44 18 28 147 0 0 43 13 3 18 52 17 34 115 -22 43 6 8 43 19 58 42 19 48 44 6 30 148 0 0 43 0 29 18 52 18 35 115 -21 42 53 33 43 7 25 42 7 5 43 54 4 149 0 0 42 47 26 18 52 20 36 116 -20 42 40 30 42 54 23 41 53 54 43 41 10 150 0 0 42 33 55 18 52 22 36 117 -20 42 26 57 42 40 53 41 40 14 43 27 48 151 0 0 42 19 55 18 52 23 37 118 -19 42 12 56 42 26 55 41 26 6 43 13 57 152 0 0 42 5 27 18 52 25 38 118 -18 41 58 26 42 12 27 41 11 28 42 59 38 153 0 0 41 50 29 18 52 27 39 119 -17 41 43 27 41 57 30 40 56 20 42 44 49 154 0 0 41 35 1 18 52 28 39 120 -17 41 27 59 41 42 4 40 40 43 42 29 31 155 0 0 41 19 4 18 52 30 40 121 -16 41 12 0 41 26 8 40 24 36 42 13 44 156 0 0 41 2 37 18 52 32 41 122 -15 40 55 32 41 9 43 40 7 59 41 57 27 157 0 0 40 45 40 18 52 34 42 122 -14 40 38 33 40 52 47 39 50 52 41 40 41 158 0 0 40 28 13 18 52 36 43 123 -13 40 21 5 40 35 21 39 33 14 41 23 24 159 0 0 40 10 15 18 52 38 43 124 -13 40 3 5 40 17 24 39 15 5 41 5 37 160 0 0 39 51 46 18 52 40 44 125 -12 39 44 35 39 58 57 38 56 26 40 47 19 161 0 0 39 32 46 18 52 42 45 126 -11 39 25 34 39 39 59 38 37 15 40 28 30 162 0 0 39 13 15 18 52 44 46 126 -10 39 6 2 39 20 29 38 17 33 40 9 10 163 0 0 38 53 13 18 52 46 47 127 -9 38 45 58 39 0 28 37 57 20 39 49 19 164 0 0 38 32 39 18 52 48 47 128 -8 38 25 23 38 39 56 37 36 35 39 28 57 165 0 0 38 11 34 18 52 51 48 129 -8 38 4 16 38 18 52 37 15 18 39 8 3 166 0 0 37 49 57 18 52 53 49 130 -7 37 42 37 37 57 16 36 53 29 38 46 38 167 0 0 37 27 47 18 52 55 50 131 -6 37 20 26 37 35 8 36 31 8 38 24 40 168 0 0 37 5 6 18 52 58 51 132 -5 36 57 43 37 12 29 36 8 15 38 2 11 169 0 0 36 41 52 18 53 0 52 133 -4 36 34 28 36 49 16 35 44 49 37 39 9 170 0 0 36 18 6 18 53 3 53 134 -3 36 10 40 36 25 32 35 20 52 37 15 35 171 0 0 35 53 48 18 53 5 53 135 -2 35 46 21 36 1 15 34 56 21 36 51 28 172 0 0 35 28 57 18 53 8 54 136 -1 35 21 28 35 36 26 34 31 19 36 26 50 173 0 0 35 3 34 18 53 11 55 137 0 34 56 3 35 11 4 34 5 43 36 1 38 Uncertainty in time = +/- 4 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 0846-01318-1 * constellation : Leo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 10 50 15.5080 DE: +07 32 32.934 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .022, .020 ) * V mag [mag]: 9.8 * B mag [mag]: 10.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4266) Waltari approx. diameter [km]: 24 approx. diameter ["]: .011 distance from Earth [AU]: 2.99700 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 552 number of rejected observations: 8 time covered by the observations: 1940 Dec 28 - 2007 Dec 16 1 sigma uncertainty ellipse (major, minor, PA): 0.062, 0.032, 129° remarks: * orbital elements for (4266) Waltari : Mean anomaly = 15.48461716 deg Arg. of pericenter = 157.26267355 deg Long. of node = 322.56676035 deg Inclination = 16.49283768 deg Eccentricity = 0.17479052 Semimajor axis = 3.17464081 AU Perihelion dist = 2.61974369 AU Mag: H = 11.80, G = 0.15 Epoch of elements : MJD 55138.78800000 TDT (2009 Nov 03.788) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Nov 3 4266 Waltari 18h 54.9m UT 9.8 10 50 15.508 7 32 32.93TYC 0846-01318-1 10.2 17.1 24 0.7 2.997 3.064 -28.63 -164.3221 7.551 -107.82 -15.28 18.9148 0.11964 0.18982 15.52472 -9.75636 -0.00463 0.00190 2000 13.95334520091026.00000157.262674322.566760 16.4928380.17479052 3.1746408 2.619743711.6 5.00.15 RATE 1.7424580 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.065 0.037 125 4.36 0.037 0 54581.5020091103_1318-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 09:25 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org