IOTA/IOTA-ES occultation update for (216) Kleopatra / UCAC2 33505934 event on 2009 Feb 02, 00:33 UT Visible from Summary ------- On 2009 Feb 02 UT, the 135 km diameter asteroid (216) Kleopatra will occult a 11.9 mag star in the constellation Pisces for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 0.7 mag to 11.7 mag (the magnitude of the asteroid) for at most 3.9 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 99 * date and approx. time of event: 2009 Feb 02, 00:34 - 2009 Feb 02, 00:36 UT * magnitude of target star: 11.9 * magnitude drop [mag]: 0.7 * estimated maximum duration [s]: 3.9 * Moon: 39 % sunlit, 16° distance * Sun: 63° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 147 * 1 sigma uncertainty interval [path widths]: +/- 0.30 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .026 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .026", .024", 89° ) * approx speed of asteroid's shadow [km/s]: 34.4959 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 33505934 by 216 Kleopatra on 2009 Feb 2 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 - 91 0 0 -11 22 2 0 34 56 51 294 -1 -12 2 45 -10 41 32 -12 27 17 -10 17 19 - 90 0 0 -11 12 0 0 34 59 50 293 -2 -11 52 41 -10 31 31 -12 17 13 -10 7 20 - 89 0 0 -11 2 14 0 35 2 50 292 -3 -11 42 53 -10 21 47 -12 7 24 - 9 57 37 - 88 0 0 -10 52 43 0 35 4 49 291 -4 -11 33 21 -10 12 18 -11 57 50 - 9 48 9 - 87 0 0 -10 43 29 0 35 7 48 290 -5 -11 24 5 -10 3 6 -11 48 33 - 9 38 57 - 86 0 0 -10 34 31 0 35 10 47 290 -6 -11 15 5 - 9 54 9 -11 39 32 - 9 30 2 - 85 0 0 -10 25 49 0 35 12 46 289 -7 -11 6 22 - 9 45 29 -11 30 48 - 9 21 22 - 84 0 0 -10 17 23 0 35 15 45 288 -8 -10 57 55 - 9 37 5 -11 22 20 - 9 12 59 - 83 0 0 -10 9 15 0 35 17 44 288 -9 -10 49 44 - 9 28 58 -11 14 8 - 9 4 53 - 82 0 0 -10 1 23 0 35 20 43 287 -10 -10 41 51 - 9 21 7 -11 6 14 - 8 57 3 - 81 0 0 - 9 53 47 0 35 22 42 287 -11 -10 34 14 - 9 13 33 -10 58 36 - 8 49 31 - 80 0 0 - 9 46 29 0 35 25 42 286 -12 -10 26 54 - 9 6 17 -10 51 16 - 8 42 15 - 79 0 0 - 9 39 28 0 35 27 41 286 -13 -10 19 52 - 8 59 17 -10 44 13 - 8 35 16 - 78 0 0 - 9 32 44 0 35 29 40 285 -14 -10 13 7 - 8 52 34 -10 37 27 - 8 28 34 - 77 0 0 - 9 26 18 0 35 31 39 285 -15 -10 6 39 - 8 46 9 -10 30 58 - 8 22 10 - 76 0 0 - 9 20 9 0 35 34 38 284 -16 -10 0 29 - 8 40 2 -10 24 47 - 8 16 3 - 75 0 0 - 9 14 18 0 35 36 37 284 -17 - 9 54 37 - 8 34 12 -10 18 54 - 8 10 13 - 74 0 0 - 9 8 44 0 35 38 36 283 -17 - 9 49 2 - 8 28 39 -10 13 18 - 8 4 42 - 73 0 0 - 9 3 28 0 35 40 35 283 -18 - 9 43 45 - 8 23 24 -10 8 1 - 7 59 27 - 72 0 0 - 8 58 30 0 35 42 34 283 -19 - 9 38 46 - 8 18 27 -10 3 1 - 7 54 31 - 71 0 0 - 8 53 50 0 35 44 33 282 -20 - 9 34 4 - 8 13 48 - 9 58 19 - 7 49 52 - 70 0 0 - 8 49 28 0 35 46 32 282 -21 - 9 29 41 - 8 9 27 - 9 53 55 - 7 45 32 - 69 0 0 - 8 45 23 0 35 48 31 282 -22 - 9 25 36 - 8 5 23 - 9 49 50 - 7 41 29 - 68 0 0 - 8 41 37 0 35 49 30 281 -23 - 9 21 49 - 8 1 38 - 9 46 2 - 7 37 44 - 67 0 0 - 8 38 9 0 35 51 29 281 -24 - 9 18 20 - 7 58 11 - 9 42 33 - 7 34 17 - 66 0 0 - 8 35 0 0 35 53 28 281 -25 - 9 15 10 - 7 55 2 - 9 39 22 - 7 31 8 - 65 0 0 - 8 32 8 0 35 54 27 281 -26 - 9 12 18 - 7 52 11 - 9 36 30 - 7 28 18 - 64 0 0 - 8 29 35 0 35 56 26 280 -27 - 9 9 44 - 7 49 38 - 9 33 55 - 7 25 45 - 63 0 0 - 8 27 20 0 35 58 25 280 -28 - 9 7 28 - 7 47 23 - 9 31 40 - 7 23 31 - 62 0 0 - 8 25 23 0 35 59 24 280 -29 - 9 5 31 - 7 45 27 - 9 29 42 - 7 21 35 - 61 0 0 - 8 23 45 0 36 0 23 280 -30 - 9 3 53 - 7 43 49 - 9 28 3 - 7 19 58 - 60 0 0 - 8 22 25 0 36 2 22 279 -31 - 9 2 32 - 7 42 30 - 9 26 43 - 7 18 38 - 59 0 0 - 8 21 23 0 36 3 21 279 -32 - 9 1 30 - 7 41 28 - 9 25 41 - 7 17 37 - 58 0 0 - 8 20 40 0 36 4 20 279 -32 - 9 0 47 - 7 40 45 - 9 24 57 - 7 16 54 - 57 0 0 - 8 20 15 0 36 6 20 279 -33 - 9 0 22 - 7 40 20 - 9 24 32 - 7 16 29 - 56 0 0 - 8 20 8 0 36 7 19 278 -34 - 9 0 15 - 7 40 14 - 9 24 25 - 7 16 23 - 55 0 0 - 8 20 20 0 36 8 18 278 -35 - 9 0 27 - 7 40 26 - 9 24 37 - 7 16 35 - 54 0 0 - 8 20 50 0 36 9 17 278 -36 - 9 0 57 - 7 40 56 - 9 25 7 - 7 17 5 - 53 0 0 - 8 21 39 0 36 10 16 278 -37 - 9 1 46 - 7 41 44 - 9 25 56 - 7 17 53 - 52 0 0 - 8 22 46 0 36 11 15 278 -38 - 9 2 53 - 7 42 51 - 9 27 3 - 7 19 0 - 51 0 0 - 8 24 11 0 36 12 14 278 -39 - 9 4 18 - 7 44 16 - 9 28 28 - 7 20 24 - 50 0 0 - 8 25 54 0 36 12 13 277 -39 - 9 6 1 - 7 45 58 - 9 30 12 - 7 22 7 - 49 0 0 - 8 27 55 0 36 13 12 277 -40 - 9 8 3 - 7 47 59 - 9 32 14 - 7 24 8 - 48 0 0 - 8 30 15 0 36 14 11 277 -41 - 9 10 23 - 7 50 19 - 9 34 34 - 7 26 27 - 47 0 0 - 8 32 52 0 36 14 10 277 -42 - 9 13 1 - 7 52 56 - 9 37 12 - 7 29 3 - 46 0 0 - 8 35 48 0 36 15 9 277 -43 - 9 15 57 - 7 55 51 - 9 40 9 - 7 31 58 - 45 0 0 - 8 39 1 0 36 15 8 277 -44 - 9 19 11 - 7 59 4 - 9 43 23 - 7 35 11 - 44 0 0 - 8 42 33 0 36 16 7 276 -44 - 9 22 43 - 8 2 34 - 9 46 55 - 7 38 41 - 43 0 0 - 8 46 22 0 36 16 6 276 -45 - 9 26 33 - 8 6 23 - 9 50 46 - 7 42 29 - 42 0 0 - 8 50 29 0 36 17 5 276 -46 - 9 30 41 - 8 10 29 - 9 54 54 - 7 46 35 - 41 0 0 - 8 54 54 0 36 17 4 276 -47 - 9 35 6 - 8 14 53 - 9 59 20 - 7 50 58 - 40 0 0 - 8 59 36 0 36 17 3 276 -47 - 9 39 49 - 8 19 34 -10 4 4 - 7 55 39 - 39 0 0 - 9 4 35 0 36 17 2 276 -48 - 9 44 50 - 8 24 33 -10 9 5 - 8 0 38 - 38 0 0 - 9 9 53 0 36 17 1 276 -49 - 9 50 8 - 8 29 49 -10 14 24 - 8 5 53 Uncertainty in time = +/- 1 secs [Prediction of 2008 Nov 6.0] Data for the target star ------------------------ * name: UCAC2 33505934 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 00 59 32.4006 DE: +05 16 51.185 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .024, .023 ) * V mag [mag]: 11.9 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (216) Kleopatra approx. diameter [km]: 135 approx. diameter ["]: .079 distance from Earth [AU]: 2.36700 * orbital information: orbit source: Preston date of fit: 2008 Nov 05 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1687 number of rejected observations: 170 time covered by the observations: 1905 Aug 03 - 2008 Oct 15 1 sigma uncertainty ellipse (major, minor, PA): 0.009, 0.005, 84° remarks: * orbital elements for (216) Kleopatra : Mean anomaly = 2.91502730 deg Arg. of pericenter = 179.94443286 deg Long. of node = 215.51374103 deg Inclination = 13.09612780 deg Eccentricity = 0.24818407 Semimajor axis = 2.79586511 AU Perihelion dist = 2.10197593 AU Mag: H = 7.11, G = 0.29 Epoch of elements : MJD 54864.02300000 TDT (2009 Feb 02.023) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Feb 2 216 Kleopatra 0h 33.5m UT 11.9 0 59 32.401 5 16 51.19UCAC2 33505934 0.0 11.7 135 3.9 2.367 4.689 18.10 -125.8238 5.275 175.06 -16.83 0.5577 0.09939 -0.38942 18.85128 4.87120 0.00457 0.00185 2000 2.0668632009 129.00000179.944433215.513741 13.0961280.24818407 2.7958651 2.1019759 7.3 5.00.29 RATE 2.1082870 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.026 0.024 89 1.30 0.024 2 5 650 3 380 54776.5020090202_505934 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 06, 04:43 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org