IOTA/IOTA-ES occultation update for (49) Pales / TYC 5240-00803-1 event on 2009 Jun 04, 01:39 UT Visible from Summary ------- On 2009 Jun 04 UT, the 150 km diameter asteroid (49) Pales will occult a 10.6 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.6 mag to 13.1 mag (the magnitude of the asteroid) for at most 8.4 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: 99 * date and approx. time of event: 2009 Jun 04, 01:33 - 2009 Jun 04, 01:39 UT * magnitude of target star: 10.6 * magnitude drop [mag]: 2.6 * estimated maximum duration [s]: 8.4 * Moon: 87 % sunlit, 130° distance * Sun: 92° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 150 * 1 sigma uncertainty interval [path widths]: +/- 0.27 * 1 sigma uncertainty interval [seconds]: +/- 2.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .026 +/- .022) * 1 sigma uncertainty ellipse (major, minor, PA): ( .026", .021", 82° ) * approx speed of asteroid's shadow [km/s]: 17.7313 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5240-00803-1 by 49 Pales on 2009 Jun 4 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 - 27 0 0 -30 24 52 1 33 26 0 96 -81 -31 5 47 .. .. .. -31 27 54 .. .. .. - 26 0 0 -30 30 26 1 33 26 1 96 -82 -31 11 19 -29 49 34 -31 33 24 -29 27 30 - 25 0 0 -30 35 34 1 33 26 2 95 -82 -31 16 25 -29 54 44 -31 38 29 -29 32 42 - 24 0 0 -30 40 16 1 33 26 3 95 -82 -31 21 6 -29 59 29 -31 43 9 -29 37 27 - 23 0 0 -30 44 34 1 33 27 3 94 -81 -31 25 21 -30 3 47 -31 47 23 -29 41 47 - 22 0 0 -30 48 25 1 33 27 4 94 -81 -31 29 11 -30 7 41 -31 51 13 -29 45 41 - 21 0 0 -30 51 51 1 33 27 5 93 -81 -31 32 36 -30 11 8 -31 54 37 -29 49 9 - 20 0 0 -30 54 52 1 33 28 6 93 -81 -31 35 35 -30 14 10 -31 57 35 -29 52 11 - 19 0 0 -30 57 27 1 33 29 7 92 -80 -31 38 9 -30 16 46 -32 0 9 -29 54 48 - 18 0 0 -30 59 36 1 33 29 8 92 -80 -31 40 18 -30 18 56 -32 2 17 -29 56 59 - 17 0 0 -31 1 20 1 33 30 9 91 -79 -31 42 1 -30 20 41 -32 4 0 -29 58 44 - 16 0 0 -31 2 39 1 33 31 10 91 -79 -31 43 19 -30 22 0 -32 5 18 -30 0 3 - 15 0 0 -31 3 32 1 33 32 10 90 -78 -31 44 12 -30 22 53 -32 6 10 -30 0 57 - 14 0 0 -31 3 59 1 33 33 11 90 -78 -31 44 39 -30 23 21 -32 6 37 -30 1 24 - 13 0 0 -31 4 1 1 33 34 12 89 -77 -31 44 40 -30 23 22 -32 6 38 -30 1 26 - 12 0 0 -31 3 37 1 33 35 13 89 -76 -31 44 17 -30 22 58 -32 6 15 -30 1 2 - 11 0 0 -31 2 47 1 33 36 14 88 -76 -31 43 27 -30 22 8 -32 5 26 -30 0 12 - 10 0 0 -31 1 32 1 33 38 15 88 -75 -31 42 12 -30 20 53 -32 4 11 -29 58 56 - 9 0 0 -30 59 51 1 33 39 16 87 -74 -31 40 32 -30 19 11 -32 2 31 -29 57 14 - 8 0 0 -30 57 44 1 33 41 16 87 -73 -31 38 26 -30 17 3 -32 0 25 -29 55 6 - 7 0 0 -30 55 11 1 33 42 17 86 -73 -31 35 54 -30 14 30 -31 57 54 -29 52 32 - 6 0 0 -30 52 13 1 33 44 18 86 -72 -31 32 57 -30 11 30 -31 54 58 -29 49 31 - 5 0 0 -30 48 49 1 33 46 19 85 -71 -31 29 34 -30 8 4 -31 51 35 -29 46 5 - 4 0 0 -30 44 58 1 33 47 20 84 -70 -31 25 45 -30 4 13 -31 47 47 -29 42 12 - 3 0 0 -30 40 42 1 33 49 21 84 -70 -31 21 31 -29 59 55 -31 43 33 -29 37 53 - 2 0 0 -30 36 0 1 33 51 22 83 -69 -31 16 50 -29 55 10 -31 38 54 -29 33 8 - 1 0 0 -30 30 51 1 33 53 22 83 -68 -31 11 44 -29 50 0 -31 33 49 -29 27 57 0 0 0 -30 25 16 1 33 55 23 82 -67 -31 6 11 -29 44 23 -31 28 17 -29 22 19 1 0 0 -30 19 15 1 33 58 24 82 -66 -31 0 12 -29 38 20 -31 22 20 -29 16 14 2 0 0 -30 12 48 1 34 0 25 81 -65 -30 53 48 -29 31 50 -31 15 57 -29 9 43 3 0 0 -30 5 55 1 34 2 26 81 -65 -30 46 57 -29 24 54 -31 9 7 -29 2 45 4 0 0 -29 58 35 1 34 5 27 80 -64 -30 39 40 -29 17 31 -31 1 51 -28 55 21 5 0 0 -29 50 48 1 34 7 28 80 -63 -30 31 56 -29 9 41 -30 54 9 -28 47 30 6 0 0 -29 42 35 1 34 10 29 79 -62 -30 23 46 -29 1 25 -30 46 1 -28 39 12 7 0 0 -29 33 55 1 34 13 30 79 -61 -30 15 10 -28 52 42 -30 37 27 -28 30 27 8 0 0 -29 24 49 1 34 16 30 78 -60 -30 6 7 -28 43 32 -30 28 25 -28 21 15 9 0 0 -29 15 15 1 34 18 31 78 -60 -29 56 37 -28 33 55 -30 18 58 -28 11 36 10 0 0 -29 5 15 1 34 21 32 77 -59 -29 46 41 -28 23 51 -30 9 3 -28 1 30 11 0 0 -28 54 48 1 34 25 33 77 -58 -29 36 18 -28 13 20 -29 58 42 -27 50 57 12 0 0 -28 43 54 1 34 28 34 76 -57 -29 25 28 -28 2 22 -29 47 55 -27 39 57 13 0 0 -28 32 33 1 34 31 35 76 -56 -29 14 11 -27 50 57 -29 36 40 -27 28 29 14 0 0 -28 20 45 1 34 34 36 75 -55 -29 2 27 -27 39 4 -29 24 58 -27 16 34 15 0 0 -28 8 29 1 34 38 37 75 -54 -28 50 16 -27 26 44 -29 12 50 -27 4 12 16 0 0 -27 55 47 1 34 41 38 74 -53 -28 37 38 -27 13 57 -29 0 14 -26 51 22 17 0 0 -27 42 37 1 34 45 39 74 -53 -28 24 32 -27 0 42 -28 47 12 -26 38 4 18 0 0 -27 28 59 1 34 48 40 73 -52 -28 11 0 -26 47 0 -28 33 42 -26 24 20 19 0 0 -27 14 54 1 34 52 40 73 -51 -27 57 0 -26 32 50 -28 19 45 -26 10 7 20 0 0 -27 0 22 1 34 56 41 72 -50 -27 42 33 -26 18 12 -28 5 20 -25 55 27 21 0 0 -26 45 22 1 35 0 42 72 -49 -27 27 38 -26 3 7 -27 50 28 -25 40 19 22 0 0 -26 29 55 1 35 4 43 71 -48 -27 12 16 -25 47 35 -27 35 9 -25 24 43 23 0 0 -26 14 0 1 35 8 44 71 -47 -26 56 27 -25 31 34 -27 19 23 -25 8 40 24 0 0 -25 57 37 1 35 12 45 70 -46 -26 40 10 -25 15 6 -27 3 9 -24 52 9 25 0 0 -25 40 47 1 35 17 46 70 -45 -26 23 26 -24 58 10 -26 46 28 -24 35 10 26 0 0 -25 23 30 1 35 21 47 69 -44 -26 6 14 -24 40 47 -26 29 19 -24 17 44 27 0 0 -25 5 45 1 35 26 48 69 -43 -25 48 34 -24 22 56 -26 11 43 -23 59 49 28 0 0 -24 47 32 1 35 30 49 68 -42 -25 30 28 -24 4 37 -25 53 39 -23 41 28 29 0 0 -24 28 52 1 35 35 50 68 -41 -25 11 54 -23 45 51 -25 35 8 -23 22 38 30 0 0 -24 9 44 1 35 40 51 67 -40 -24 52 52 -23 26 38 -25 16 10 -23 3 21 31 0 0 -23 50 9 1 35 44 52 67 -39 -24 33 23 -23 6 56 -24 56 44 -22 43 37 32 0 0 -23 30 7 1 35 49 53 66 -38 -24 13 27 -22 46 48 -24 36 52 -22 23 25 33 0 0 -23 9 37 1 35 54 54 66 -37 -23 53 4 -22 26 12 -24 16 32 -22 2 46 34 0 0 -22 48 40 1 36 0 55 65 -36 -23 32 13 -22 5 9 -23 55 45 -21 41 40 35 0 0 -22 27 17 1 36 5 56 65 -35 -23 10 56 -21 43 39 -23 34 31 -21 20 6 36 0 0 -22 5 26 1 36 10 57 64 -34 -22 49 12 -21 21 43 -23 12 50 -20 58 6 37 0 0 -21 43 9 1 36 16 58 64 -33 -22 27 1 -20 59 19 -22 50 43 -20 35 39 38 0 0 -21 20 26 1 36 21 59 63 -32 -22 4 24 -20 36 29 -22 28 9 -20 12 46 39 0 0 -20 57 16 1 36 27 60 63 -31 -21 41 20 -20 13 13 -22 5 9 -19 49 26 40 0 0 -20 33 40 1 36 32 61 62 -30 -21 17 50 -19 49 31 -21 41 42 -19 25 41 41 0 0 -20 9 38 1 36 38 62 62 -29 -20 53 55 -19 25 23 -21 17 50 -19 1 29 42 0 0 -19 45 11 1 36 44 63 61 -28 -20 29 34 -19 0 49 -20 53 33 -18 36 52 43 0 0 -19 20 18 1 36 50 64 61 -27 -20 4 47 -18 35 50 -20 28 50 -18 11 50 44 0 0 -18 55 1 1 36 56 65 60 -26 -19 39 36 -18 10 27 -20 3 42 -17 46 23 45 0 0 -18 29 19 1 37 2 66 59 -25 -19 14 0 -17 44 39 -19 38 9 -17 20 32 46 0 0 -18 3 13 1 37 8 67 59 -24 -18 48 0 -17 18 27 -19 12 12 -16 54 17 47 0 0 -17 36 43 1 37 14 68 58 -23 -18 21 36 -16 51 51 -18 45 52 -16 27 38 48 0 0 -17 9 49 1 37 21 70 57 -22 -17 54 49 -16 24 52 -18 19 7 -16 0 35 49 0 0 -16 42 33 1 37 27 71 57 -21 -17 27 38 -15 57 30 -17 52 0 -15 33 10 50 0 0 -16 14 54 1 37 33 72 56 -20 -17 0 5 -15 29 45 -17 24 30 -15 5 23 51 0 0 -15 46 54 1 37 40 73 55 -19 -16 32 10 -15 1 39 -16 56 38 -14 37 14 52 0 0 -15 18 32 1 37 47 74 54 -18 -16 3 54 -14 33 12 -16 28 24 -14 8 44 53 0 0 -14 49 49 1 37 53 75 53 -17 -15 35 16 -14 4 24 -15 59 50 -13 39 53 54 0 0 -14 20 46 1 38 0 76 52 -15 -15 6 19 -13 35 16 -15 30 55 -13 10 42 55 0 0 -13 51 24 1 38 7 77 51 -14 -14 37 1 -13 5 49 -15 1 40 -12 41 12 56 0 0 -13 21 43 1 38 14 78 49 -13 -14 7 25 -12 36 3 -14 32 6 -12 11 24 57 0 0 -12 51 43 1 38 20 79 48 -12 -13 37 30 -12 5 59 -14 2 14 -11 41 17 58 0 0 -12 21 26 1 38 27 80 46 -11 -13 7 17 -11 35 37 -13 32 3 -11 10 53 59 0 0 -11 50 53 1 38 34 81 43 -10 -12 36 48 -11 4 59 -13 1 36 -10 40 13 60 0 0 -11 20 3 1 38 41 82 40 -9 -12 6 2 -10 34 6 -12 30 53 -10 9 18 61 0 0 -10 48 58 1 38 49 83 36 -8 -11 35 1 -10 2 57 -11 59 54 - 9 38 7 62 0 0 -10 17 39 1 38 56 84 31 -6 -11 3 45 - 9 31 35 -11 28 40 - 9 6 42 63 0 0 - 9 46 6 1 39 3 85 23 -5 -10 32 16 - 8 59 59 -10 57 13 - 8 35 5 64 0 0 - 9 14 21 1 39 10 86 11 -4 -10 0 34 - 8 28 10 -10 25 32 - 8 3 15 65 0 0 - 8 42 24 1 39 17 87 355 -3 - 9 28 40 - 7 56 11 - 9 53 39 - 7 31 14 66 0 0 - 8 10 16 1 39 24 87 334 -2 - 8 56 35 - 7 24 0 - 9 21 36 - 6 59 2 67 0 0 - 7 37 59 1 39 32 87 312 -1 - 8 24 19 - 6 51 41 - 8 49 22 - 6 26 41 Uncertainty in time = +/- 3 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 5240-00803-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 22 48 12.2543 DE: -05 31 42.456 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .019 ) * V mag [mag]: 10.6 * B mag [mag]: 11.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (49) Pales approx. diameter [km]: 150 approx. diameter ["]: .081 distance from Earth [AU]: 2.54700 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 859 number of rejected observations: 173 time covered by the observations: 1908 Jan 13 - 2008 Feb 08 1 sigma uncertainty ellipse (major, minor, PA): 0.015, 0.010, 66° remarks: * orbital elements for (49) Pales : Mean anomaly = 308.40075759 deg Arg. of pericenter = 109.70413351 deg Long. of node = 286.11322187 deg Inclination = 3.17621083 deg Eccentricity = 0.22944423 Semimajor axis = 3.09438531 AU Perihelion dist = 2.38439647 AU Mag: H = 7.52, G = 0.15 Epoch of elements : MJD 54986.06900000 TDT (2009 Jun 04.069) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jun 4 49 Pales 1h 39.4m UT 10.6 22 48 12.254- 5 31 42.46TYC 5240-00803-1 11.2 13.1 150 8.4 2.547 2.053 15.93 64.5582 -5.533 154.72 22.43 1.6570 0.02474 -0.04500 8.88101 4.61394 -0.00513 -0.00210 2000 307.3018542009 529.00000109.704134286.113222 3.1762110.22944423 3.0943853 2.3843965 7.8 5.00.15 RATE 1.8106840 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.026 0.021 82 1.27 0.022 0 54545.5020090604_0803-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 08:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org