IOTA/IOTA-ES occultation update for (589) Croatia / TYC 0664-00875-1 event on 2009 Aug 02, 03:13 UT Visible from Summary ------- On 2009 Aug 02 UT, the 88 km diameter asteroid (589) Croatia will occult a 10.3 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.7 mag to 15.0 mag (the magnitude of the asteroid) for at most 3.4 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: 81 * date and approx. time of event: 2009 Aug 02, 03:10 - 2009 Aug 02, 03:11 UT * magnitude of target star: 10.3 * magnitude drop [mag]: 4.7 * estimated maximum duration [s]: 3.4 * Moon: 87 % sunlit, 149° distance * Sun: 73° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 131 * 1 sigma uncertainty interval [path widths]: +/- 0.65 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .027 +/- .025) * 1 sigma uncertainty ellipse (major, minor, PA): ( .027", .025", 87° ) * approx speed of asteroid's shadow [km/s]: 25.6442 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0664-00875-1 by 589 Croatia on 2009 Aug 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 - 44 0 0 45 27 23 3 10 12 1 72 -27 44 50 6 46 5 9 .. .. .. 46 55 0 - 43 0 0 45 41 43 3 10 12 1 73 -27 45 4 24 46 19 30 .. .. .. 47 9 23 - 42 0 0 45 56 4 3 10 12 2 74 -26 45 18 43 46 33 53 .. .. .. 47 23 47 - 41 0 0 46 10 26 3 10 13 3 74 -26 45 33 4 46 48 16 .. .. .. 47 38 12 - 40 0 0 46 24 49 3 10 13 4 75 -26 45 47 26 47 2 40 .. .. .. 47 52 38 - 39 0 0 46 39 12 3 10 13 4 76 -25 46 1 49 47 17 5 .. .. .. 48 7 4 - 38 0 0 46 53 36 3 10 14 5 76 -25 46 16 11 47 31 30 45 28 14 48 21 30 - 37 0 0 47 7 59 3 10 14 6 77 -25 46 30 34 47 45 54 45 42 36 48 35 56 - 36 0 0 47 22 22 3 10 15 6 78 -24 46 44 56 48 0 18 45 56 57 48 50 21 - 35 0 0 47 36 44 3 10 15 7 79 -24 46 59 17 48 14 40 46 11 17 49 4 45 - 34 0 0 47 51 5 3 10 16 8 79 -24 47 13 37 48 29 2 46 25 36 49 19 7 - 33 0 0 48 5 24 3 10 16 9 80 -23 47 27 56 48 43 22 46 39 54 49 33 28 - 32 0 0 48 19 42 3 10 17 9 81 -23 47 42 13 48 57 39 46 54 10 49 47 46 - 31 0 0 48 33 57 3 10 18 10 82 -22 47 56 28 49 11 55 47 8 25 50 2 2 - 30 0 0 48 48 9 3 10 19 11 82 -22 48 10 40 49 26 8 47 22 37 50 16 16 - 29 0 0 49 2 19 3 10 20 11 83 -22 48 24 50 49 40 18 47 36 46 50 30 26 - 28 0 0 49 16 26 3 10 21 12 84 -21 48 38 56 49 54 25 47 50 53 50 44 33 - 27 0 0 49 30 29 3 10 21 13 85 -21 48 52 59 50 8 28 48 4 56 50 58 36 - 26 0 0 49 44 29 3 10 22 13 86 -20 49 6 59 50 22 28 48 18 56 51 12 35 - 25 0 0 49 58 24 3 10 24 14 86 -20 49 20 55 50 36 23 48 32 52 51 26 31 - 24 0 0 50 12 16 3 10 25 15 87 -19 49 34 46 50 50 14 48 46 43 51 40 21 - 23 0 0 50 26 2 3 10 26 15 88 -19 49 48 33 51 4 0 49 0 31 51 54 7 - 22 0 0 50 39 44 3 10 27 16 89 -19 50 2 16 51 17 41 49 14 14 52 7 48 - 21 0 0 50 53 21 3 10 28 17 90 -18 50 15 53 51 31 18 49 27 51 52 21 23 - 20 0 0 51 6 52 3 10 30 17 91 -18 50 29 25 51 44 48 49 41 24 52 34 53 - 19 0 0 51 20 18 3 10 31 18 91 -17 50 42 51 51 58 13 49 54 51 52 48 17 - 18 0 0 51 33 37 3 10 32 19 92 -17 50 56 12 52 11 32 50 8 13 53 1 34 - 17 0 0 51 46 51 3 10 34 19 93 -16 51 9 26 52 24 45 50 21 29 53 14 46 - 16 0 0 51 59 58 3 10 35 20 94 -16 51 22 34 52 37 51 50 34 38 53 27 51 - 15 0 0 52 12 59 3 10 36 20 95 -15 51 35 36 52 50 51 50 47 41 53 40 49 - 14 0 0 52 25 53 3 10 38 21 96 -15 51 48 31 53 3 43 51 0 38 53 53 40 - 13 0 0 52 38 40 3 10 39 22 97 -14 52 1 19 53 16 29 51 13 27 54 6 24 - 12 0 0 52 51 19 3 10 41 22 98 -14 52 14 0 53 29 7 51 26 10 54 19 0 - 11 0 0 53 3 51 3 10 43 23 99 -13 52 26 34 53 41 38 51 38 45 54 31 29 - 10 0 0 53 16 16 3 10 44 23 100 -13 52 39 0 53 54 1 51 51 13 54 43 50 - 9 0 0 53 28 33 3 10 46 24 100 -12 52 51 18 54 6 16 52 3 33 54 56 3 - 8 0 0 53 40 41 3 10 48 24 101 -12 53 3 28 54 18 23 52 15 45 55 8 7 - 7 0 0 53 52 42 3 10 49 25 102 -11 53 15 30 54 30 22 52 27 49 55 20 4 - 6 0 0 54 4 34 3 10 51 25 103 -11 53 27 24 54 42 12 52 39 45 55 31 52 - 5 0 0 54 16 18 3 10 53 26 104 -10 53 39 10 54 53 54 52 51 33 55 43 31 - 4 0 0 54 27 53 3 10 55 26 105 -9 53 50 47 55 5 27 53 3 12 55 55 2 - 3 0 0 54 39 19 3 10 56 27 106 -9 54 2 15 55 16 51 53 14 43 56 6 23 - 2 0 0 54 50 36 3 10 58 27 107 -8 54 13 34 55 28 7 53 26 5 56 17 36 - 1 0 0 55 1 45 3 11 0 28 108 -8 54 24 44 55 39 13 53 37 18 56 28 39 0 0 0 55 12 44 3 11 2 28 109 -7 54 35 46 55 50 10 53 48 21 56 39 33 1 0 0 55 23 34 3 11 4 29 110 -7 54 46 37 56 0 57 53 59 16 56 50 18 2 0 0 55 34 14 3 11 6 29 111 -6 54 57 20 56 11 35 54 10 1 57 0 53 3 0 0 55 44 45 3 11 8 30 112 -6 55 7 53 56 22 4 54 20 37 57 11 18 4 0 0 55 55 6 3 11 9 30 113 -5 55 18 16 56 32 23 54 31 3 57 21 34 5 0 0 56 5 17 3 11 11 31 115 -5 55 28 30 56 42 32 54 41 20 57 31 40 6 0 0 56 15 19 3 11 13 31 116 -4 55 38 34 56 52 31 54 51 27 57 41 36 7 0 0 56 25 11 3 11 15 32 117 -4 55 48 28 57 2 21 55 1 24 57 51 22 8 0 0 56 34 53 3 11 17 32 118 -3 55 58 13 57 12 0 55 11 11 58 0 58 9 0 0 56 44 25 3 11 19 32 119 -3 56 7 47 57 21 29 55 20 48 58 10 24 10 0 0 56 53 46 3 11 21 33 120 -2 56 17 11 57 30 49 55 30 15 58 19 40 11 0 0 57 2 58 3 11 23 33 121 -2 56 26 25 57 39 58 55 39 32 58 28 46 12 0 0 57 11 59 3 11 25 34 122 -1 56 35 28 57 48 56 55 48 39 58 37 41 13 0 0 57 20 50 3 11 27 34 123 0 56 44 22 57 57 45 55 57 35 58 46 26 Uncertainty in time = +/- 2 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 0664-00875-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 03 46 59.2710 DE: +12 57 30.378 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .023 ) * V mag [mag]: 10.3 * B mag [mag]: 11.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (589) Croatia approx. diameter [km]: 88 approx. diameter ["]: .038 distance from Earth [AU]: 3.15500 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 840 number of rejected observations: 67 time covered by the observations: 1906 Mar 04 - 2007 Sep 22 1 sigma uncertainty ellipse (major, minor, PA): 0.018, 0.010, 84° remarks: * orbital elements for (589) Croatia : Mean anomaly = 3.09874646 deg Arg. of pericenter = 218.05919721 deg Long. of node = 177.64098710 deg Inclination = 10.81458770 deg Eccentricity = 0.03926183 Semimajor axis = 3.13258651 AU Perihelion dist = 3.00959543 AU Mag: H = 8.95, G = 0.15 Epoch of elements : MJD 55045.13400000 TDT (2009 Aug 02.134) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Aug 2 589 Croatia 3h 13.0m UT 10.3 3 46 59.271 12 57 30.38TYC 0664-00875-1 11.2 15.0 88 3.4 3.155 2.759 0.80 57.6440 12.959 133.33 17.74 3.2165 -0.01370 0.73849 14.47147 0.28747 -0.00517 -0.00137 2000 2.1860942009 728.00000218.059197177.640987 10.8145880.03926183 3.1325865 3.0095954 9.1 5.00.15 RATE 1.7776630 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.027 0.025 87 1.65 0.025 0 54545.5020090802_0875-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 11:35 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org