IOTA/IOTA-ES occultation update for (654) Zelinda / UCAC2 32186710 event on 2009 Feb 05, 05:28 UT Visible from Summary ------- On 2009 Feb 05 UT, the 129 km diameter asteroid (654) Zelinda will occult a 11.9 mag star in the constellation Canis Minor for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 0.2 mag to 10.2 mag (the magnitude of the asteroid) for at most 17.7 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: 96 * date and approx. time of event: 2009 Feb 05, 05:14 - 2009 Feb 05, 05:40 UT * magnitude of target star: 11.9 * magnitude drop [mag]: 0.2 * estimated maximum duration [s]: 17.7 * Moon: 74 % sunlit, 48° distance * Sun: 153° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 133 * 1 sigma uncertainty interval [path widths]: +/- 0.41 * 1 sigma uncertainty interval [seconds]: +/- 7.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .092 +/- .087) * 1 sigma uncertainty ellipse (major, minor, PA): ( .092", .087", 93° ) * approx speed of asteroid's shadow [km/s]: 7.2832 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 32186710 by 654 Zelinda on 2009 Feb 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 -167 0 0 -14 38 5 5 40 57 26 81 0 -14 0 56 -15 15 9 -13 30 23 -15 45 28 -166 0 0 -14 22 9 5 40 50 27 81 -1 -13 44 55 -14 59 17 -13 14 18 -15 29 40 -165 0 0 -14 5 42 5 40 43 28 81 -2 -13 28 23 -14 42 55 -12 57 43 -15 13 22 -164 0 0 -13 48 44 5 40 35 29 81 -3 -13 11 21 -14 26 3 -12 40 36 -14 56 34 -163 0 0 -13 31 17 5 40 27 30 81 -4 -12 53 48 -14 8 40 -12 22 59 -14 39 15 -162 0 0 -13 13 19 5 40 19 31 81 -5 -12 35 45 -13 50 47 -12 4 52 -14 21 26 -161 0 0 -12 54 50 5 40 11 32 80 -6 -12 17 11 -13 32 24 -11 46 14 -14 3 8 -160 0 0 -12 35 52 5 40 3 33 80 -7 -11 58 8 -13 13 31 -11 27 6 -13 44 19 -159 0 0 -12 16 24 5 39 54 34 80 -8 -11 38 34 -12 54 8 -11 7 28 -13 25 0 -158 0 0 -11 56 26 5 39 45 35 80 -9 -11 18 31 -12 34 16 -10 47 20 -13 5 12 -157 0 0 -11 35 59 5 39 36 36 80 -10 -10 57 58 -12 13 54 -10 26 43 -12 44 55 -156 0 0 -11 15 2 5 39 27 37 80 -11 -10 36 55 -11 53 3 -10 5 36 -12 24 8 -155 0 0 -10 53 36 5 39 17 38 80 -12 -10 15 24 -11 31 42 - 9 43 59 -12 2 53 -154 0 0 -10 31 41 5 39 7 39 80 -13 - 9 53 23 -11 9 53 - 9 21 54 -11 41 8 -153 0 0 -10 9 17 5 38 57 40 80 -14 - 9 30 53 -10 47 35 - 8 59 19 -11 18 55 -152 0 0 - 9 46 25 5 38 47 41 80 -15 - 9 7 55 -10 24 48 - 8 36 16 -10 56 13 -151 0 0 - 9 23 4 5 38 36 42 80 -16 - 8 44 28 -10 1 34 - 8 12 45 -10 33 3 -150 0 0 - 8 59 15 5 38 25 43 80 -17 - 8 20 34 - 9 37 51 - 7 48 45 -10 9 25 -149 0 0 - 8 34 59 5 38 14 44 80 -18 - 7 56 11 - 9 13 40 - 7 24 18 - 9 45 19 -148 0 0 - 8 10 15 5 38 3 45 80 -19 - 7 31 21 - 8 49 2 - 6 59 23 - 9 20 46 -147 0 0 - 7 45 4 5 37 51 46 80 -21 - 7 6 4 - 8 23 57 - 6 34 0 - 8 55 46 -146 0 0 - 7 19 26 5 37 39 47 81 -22 - 6 40 20 - 7 58 25 - 6 8 11 - 8 30 19 -145 0 0 - 6 53 21 5 37 27 48 81 -23 - 6 14 9 - 7 32 27 - 5 41 56 - 8 4 25 -144 0 0 - 6 26 51 5 37 15 49 81 -24 - 5 47 33 - 7 6 2 - 5 15 14 - 7 38 6 -143 0 0 - 5 59 54 5 37 2 50 81 -25 - 5 20 30 - 6 39 12 - 4 48 7 - 7 11 20 -142 0 0 - 5 32 33 5 36 50 51 81 -26 - 4 53 3 - 6 11 56 - 4 20 34 - 6 44 9 -141 0 0 - 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25 0 0 44 51 16 5 14 32 13 259 -39 45 27 35 44 15 2 45 57 25 43 45 24 - 24 0 0 44 57 11 5 14 29 12 259 -38 45 33 27 44 21 1 46 3 16 43 51 25 - 23 0 0 45 2 43 5 14 27 11 260 -38 45 38 56 44 26 36 46 8 42 43 57 2 - 22 0 0 45 7 51 5 14 25 11 261 -37 45 44 1 44 31 46 46 13 45 44 2 14 - 21 0 0 45 12 34 5 14 23 10 261 -36 45 48 42 44 36 32 46 18 24 44 7 2 - 20 0 0 45 16 54 5 14 21 9 262 -36 45 53 0 44 40 54 46 22 40 44 11 26 - 19 0 0 45 20 50 5 14 19 8 263 -35 45 56 53 44 44 52 46 26 32 44 15 26 - 18 0 0 45 24 22 5 14 18 8 264 -34 46 0 23 44 48 25 46 30 0 44 19 1 - 17 0 0 45 27 30 5 14 16 7 264 -33 46 3 30 44 51 35 46 33 5 44 22 12 - 16 0 0 45 30 14 5 14 15 6 265 -33 46 6 12 44 54 21 46 35 46 44 24 59 - 15 0 0 45 32 34 5 14 14 6 266 -32 46 8 31 44 56 43 46 38 4 44 27 22 - 14 0 0 45 34 31 5 14 13 5 266 -31 46 10 27 44 58 40 46 39 59 44 29 21 - 13 0 0 45 36 4 5 14 12 4 267 -31 46 11 59 45 0 14 46 41 30 44 30 55 - 12 0 0 45 37 13 5 14 11 4 268 -30 46 13 7 45 1 24 46 42 37 44 32 5 - 11 0 0 45 37 58 5 14 11 3 269 -29 46 13 51 45 2 9 46 43 21 44 32 51 - 10 0 0 45 38 19 5 14 10 2 269 -29 46 14 12 45 2 31 46 43 42 44 33 13 - 9 0 0 45 38 16 5 14 10 1 270 -28 46 14 9 45 2 28 46 43 39 44 33 11 - 8 0 0 45 37 49 5 14 10 1 271 -27 46 13 42 45 2 2 46 43 12 44 32 44 - 7 0 0 45 36 59 5 14 9 0 271 -27 46 12 52 45 1 11 46 42 22 44 31 53 Uncertainty in time = +/- 8 secs [Prediction of 2008 Nov 6.0] Data for the target star ------------------------ * name: UCAC2 32186710 * constellation : Canis Minor * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 43 51.3438 DE: +01 03 50.045 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .087, .086 ) * V mag [mag]: 11.9 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (654) Zelinda approx. diameter [km]: 129 approx. diameter ["]: .215 distance from Earth [AU]: 0.82700 * orbital information: orbit source: Preston date of fit: 2008 Nov 05 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 957 number of rejected observations: 68 time covered by the observations: 1908 Jan 04 - 2008 Sep 05 1 sigma uncertainty ellipse (major, minor, PA): 0.029, 0.014, 120° remarks: * orbital elements for (654) Zelinda : Mean anomaly = 358.15708772 deg Arg. of pericenter = 213.93756635 deg Long. of node = 278.57131116 deg Inclination = 18.12808873 deg Eccentricity = 0.23239459 Semimajor axis = 2.29658619 AU Perihelion dist = 1.76287198 AU Mag: H = 8.51, G = 0.15 Epoch of elements : MJD 54867.22800000 TDT (2009 Feb 05.228) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Feb 5 654 Zelinda 5h 28.3m UT 11.9 7 43 51.344 1 3 50.04UCAC2 32186710 0.0 10.2 129 17.7 0.827 -2.471 -23.09 -101.6211 1.071 101.42 -15.88 5.4722 -0.12382 0.19768 -3.48928 -2.17348 0.00194 0.00130 2000 356.1101812009 129.00000213.937566278.571311 18.1280890.23239459 2.2965862 1.7628720 8.5 5.00.15 RATE 2.8319130 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.092 0.087 93 1.41 0.089 0 54776.5020090205_186710 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 06, 05:09 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org