IOTA/IOTA-ES occultation update for (1300) Marcelle / HIP 76329 event on 2009 Oct 07, 09:41 UT Visible from Summary ------- On 2009 Oct 07 UT, the 28 km diameter asteroid (1300) Marcelle will occult a 8.9 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.7 mag to 16.6 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: . The event at a glimpse ---------------------- * Rank: 29 * date and approx. time of event: 2009 Oct 07, 09:43 - 2009 Oct 07, 09:44 UT * magnitude of target star: 8.9 * magnitude drop [mag]: 7.7 * estimated maximum duration [s]: 0.7 * Moon: 88 % sunlit, 174° distance * Sun: 42° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 28 * 1 sigma uncertainty interval [path widths]: +/- 2.31 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .031 +/- .026) * 1 sigma uncertainty ellipse (major, minor, PA): ( .031", .025", 101° ) * approx speed of asteroid's shadow [km/s]: 39.7298 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 76329 by 1300 Marcelle on 2009 Oct 7 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 124 0 0 -26 38 56 9 43 46 41 269 0 -26 46 31 -26 31 20 -27 21 35 -25 56 17 125 0 0 -26 37 4 9 43 48 40 269 -1 -26 44 39 -26 29 28 -27 19 43 -25 54 24 126 0 0 -26 34 47 9 43 49 39 269 -2 -26 42 23 -26 27 12 -27 17 28 -25 52 7 127 0 0 -26 32 6 9 43 51 38 268 -3 -26 39 42 -26 24 31 -27 14 48 -25 49 25 128 0 0 -26 29 1 9 43 53 38 268 -4 -26 36 37 -26 21 25 -27 11 44 -25 46 19 129 0 0 -26 25 32 9 43 54 37 267 -5 -26 33 8 -26 17 56 -27 8 16 -25 42 49 130 0 0 -26 21 38 9 43 56 36 267 -6 -26 29 15 -26 14 2 -27 4 23 -25 38 54 131 0 0 -26 17 20 9 43 57 35 266 -6 -26 24 57 -26 9 44 -27 0 7 -25 34 34 132 0 0 -26 12 38 9 43 58 34 266 -7 -26 20 15 -26 5 1 -26 55 27 -25 29 50 133 0 0 -26 7 32 9 44 0 33 265 -8 -26 15 9 -25 59 54 -26 50 22 -25 24 42 134 0 0 -26 2 1 9 44 1 32 265 -9 -26 9 38 -25 54 23 -26 44 53 -25 19 9 135 0 0 -25 56 6 9 44 3 31 264 -10 -26 3 44 -25 48 28 -26 39 0 -25 13 12 136 0 0 -25 49 46 9 44 4 30 264 -11 -25 57 25 -25 42 8 -26 32 43 -25 6 50 137 0 0 -25 43 3 9 44 5 29 264 -12 -25 50 42 -25 35 24 -26 26 2 -25 0 5 138 0 0 -25 35 55 9 44 6 28 263 -13 -25 43 34 -25 28 16 -26 18 56 -24 52 54 139 0 0 -25 28 23 9 44 8 28 263 -14 -25 36 2 -25 20 43 -26 11 27 -24 45 19 140 0 0 -25 20 26 9 44 9 27 262 -15 -25 28 7 -25 12 46 -26 3 33 -24 37 20 141 0 0 -25 12 6 9 44 10 26 262 -16 -25 19 47 -25 4 25 -25 55 15 -24 28 57 142 0 0 -25 3 21 9 44 11 25 261 -16 -25 11 2 -24 55 40 -25 46 33 -24 20 9 143 0 0 -24 54 12 9 44 12 24 261 -17 -25 1 54 -24 46 30 -25 37 28 -24 10 57 144 0 0 -24 44 39 9 44 13 23 261 -18 -24 52 21 -24 36 56 -25 27 58 -24 1 21 145 0 0 -24 34 41 9 44 14 22 260 -19 -24 42 24 -24 26 58 -25 18 3 -23 51 20 146 0 0 -24 24 20 9 44 15 21 260 -20 -24 32 3 -24 16 36 -25 7 45 -23 40 55 147 0 0 -24 13 34 9 44 16 20 259 -21 -24 21 18 -24 5 50 -24 57 3 -23 30 6 148 0 0 -24 2 24 9 44 17 19 259 -22 -24 10 9 -23 54 40 -24 45 57 -23 18 52 149 0 0 -23 50 51 9 44 18 18 258 -23 -23 58 36 -23 43 5 -24 34 27 -23 7 15 150 0 0 -23 38 53 9 44 18 17 258 -24 -23 46 39 -23 31 7 -24 22 33 -22 55 13 151 0 0 -23 26 31 9 44 19 16 258 -25 -23 34 18 -23 18 44 -24 10 15 -22 42 48 152 0 0 -23 13 45 9 44 20 15 257 -26 -23 21 33 -23 5 58 -23 57 33 -22 29 58 153 0 0 -23 0 36 9 44 21 14 257 -27 -23 8 24 -22 52 47 -23 44 28 -22 16 44 154 0 0 -22 47 2 9 44 21 14 256 -28 -22 54 51 -22 39 13 -23 30 59 -22 3 7 155 0 0 -22 33 5 9 44 22 13 256 -29 -22 40 55 -22 25 16 -23 17 6 -21 49 6 156 0 0 -22 18 45 9 44 22 12 256 -30 -22 26 35 -22 10 54 -23 2 49 -21 34 41 157 0 0 -22 4 0 9 44 23 11 255 -31 -22 11 52 -21 56 9 -22 48 10 -21 19 52 158 0 0 -21 48 53 9 44 23 10 255 -31 -21 56 45 -21 41 0 -22 33 6 -21 4 40 159 0 0 -21 33 21 9 44 24 9 255 -32 -21 41 14 -21 25 29 -22 17 40 -20 49 4 160 0 0 -21 17 27 9 44 24 8 254 -33 -21 25 21 -21 9 33 -22 1 50 -20 33 5 161 0 0 -21 1 10 9 44 25 7 254 -34 -21 9 4 -20 53 15 -21 45 37 -20 16 43 162 0 0 -20 44 29 9 44 25 6 254 -35 -20 52 24 -20 36 34 -21 29 1 -19 59 58 163 0 0 -20 27 26 9 44 25 5 253 -36 -20 35 22 -20 19 29 -21 12 2 -19 42 50 164 0 0 -20 9 59 9 44 25 4 253 -37 -20 17 56 -20 2 3 -20 54 41 -19 25 19 165 0 0 -19 52 11 9 44 26 3 252 -38 -20 0 9 -19 44 13 -20 36 57 -19 7 26 166 0 0 -19 34 0 9 44 26 2 252 -39 -19 41 58 -19 26 1 -20 18 50 -18 49 10 167 0 0 -19 15 26 9 44 26 1 252 -40 -19 23 26 -19 7 27 -20 0 22 -18 30 32 Uncertainty in time = +/- 2 secs [Prediction of 2008 Nov 16.0] Data for the target star ------------------------ * name: HIP 76329 * constellation : Libra * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 15 35 28.3455 DE: -17 24 29.110 * position source: mpos:HIP2 pm:HIP2 plx:HIP2 * standard error: RA,DE ["]: ( .022, .023 ) * V mag [mag]: 8.9 * B mag [mag]: 9.8 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1300) Marcelle approx. diameter [km]: 28 approx. diameter ["]: .011 distance from Earth [AU]: 3.47400 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 737 number of rejected observations: 34 time covered by the observations: 1934 Feb 10 - 2008 Feb 13 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.011, 113° remarks: * orbital elements for (1300) Marcelle : Mean anomaly = 179.98270890 deg Arg. of pericenter = 346.16529536 deg Long. of node = 83.10136915 deg Inclination = 9.53832307 deg Eccentricity = 0.00942783 Semimajor axis = 2.78063901 AU Perihelion dist = 2.75442363 AU Mag: H = 11.39, G = 0.15 Epoch of elements : MJD 55111.40400000 TDT (2009 Oct 07.404) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Oct 7 1300 Marcelle 9h 41.8m UT 8.9 15 35 28.345-17 24 29.11HIP 76329 9.8 16.6 28 0.7 3.474 3.764 -17.91 72.2564 -17.403 31.52 -5.63 9.6959 -0.00852 -0.02316 21.27910 -7.07559 0.00375 -0.00077 2000 179.684271200910 6.00000346.165295 83.101369 9.5383230.00942783 2.7806390 2.754423610.9 5.00.15 RATE 2.1256270 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.031 0.025 101 3.31 0.026 0 54786.5020091007__76329 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 16, 16:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org