IOTA/IOTA-ES occultation update for (3193) Elliot / TYC 5822-00304-1 event on 2008 May 21, 08:10 UT Visible from Florida Summary ------- On 2008 May 21 UT, the 25 km diameter asteroid (3193) Elliot will occult a 8.9 mag star in the constellation Aquarius for observers along a path across Florida. In the case of an occultation, the combined light of the asteroid and the star will drop by 9.5 mag to 18.4 mag (the magnitude of the asteroid) for at most 0.9 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: 21 * date and approx. time of event: 2008 May 21, 08:08 - 2008 May 21, 08:09 UT * midpoint of event [JD]: 2454607.84073333 * magnitude of target star: 8.9 * magnitude drop [mag]: 9.5 * estimated maximum duration [s]: 0.9 * Moon: 99 % sunlit, 94° distance * Sun: 72° distance * rough path description: Florida The occultation path -------------------- * approximate projected width [km]: 44 * 1 sigma uncertainty interval [path widths]: +/- 3.15 * 1 sigma uncertainty interval [seconds]: +/- 3.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .054 +/- .046) * 1 sigma uncertainty ellipse (major, minor, PA): ( .056", .044", 67° ) * approx speed of asteroid's shadow [km/s]: 27.1220 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5822-00304-1 by 3193 Elliot on 2008 May 21 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 ' " Longitude Longitude Longitude Longitude Latitude Latitude Latitude Latitude - 50 0 0 37 19 17 8 9 52 32 132 0 37 6 8 37 32 31 35 45 3 38 57 52 - 51 0 0 36 58 59 8 9 49 31 131 -1 36 45 54 37 12 9 35 25 12 38 37 2 - 52 0 0 36 39 16 8 9 46 31 130 -2 36 26 15 36 52 22 35 5 56 38 16 50 - 53 0 0 36 20 11 8 9 42 30 129 -3 36 7 13 36 33 13 34 47 16 37 57 15 - 54 0 0 36 1 42 8 9 39 30 128 -4 35 48 48 36 14 40 34 29 12 37 38 18 - 55 0 0 35 43 50 8 9 36 29 127 -5 35 31 0 35 56 45 34 11 44 37 19 59 - 56 0 0 35 26 36 8 9 33 29 126 -6 35 13 49 35 39 27 33 54 53 37 2 18 - 57 0 0 35 9 59 8 9 30 28 125 -6 34 57 15 35 22 48 33 38 38 36 45 16 - 58 0 0 34 54 1 8 9 27 28 124 -7 34 41 20 35 6 46 33 23 1 36 28 54 - 59 0 0 34 38 40 8 9 24 27 123 -8 34 26 2 34 51 23 33 8 1 36 13 10 - 60 0 0 34 23 59 8 9 21 27 122 -9 34 11 23 34 36 38 32 53 39 35 58 6 - 61 0 0 34 9 55 8 9 18 26 122 -10 33 57 23 34 22 32 32 39 55 35 43 42 - 62 0 0 33 56 31 8 9 15 26 121 -11 33 44 1 34 9 5 32 26 48 35 29 57 - 63 0 0 33 43 45 8 9 13 25 120 -11 33 31 18 33 56 17 32 14 20 35 16 53 - 64 0 0 33 31 39 8 9 10 24 119 -12 33 19 14 33 44 8 32 2 29 35 4 28 - 65 0 0 33 20 12 8 9 7 24 118 -13 33 7 49 33 32 39 31 51 18 34 52 44 - 66 0 0 33 9 25 8 9 5 23 117 -14 32 57 4 33 21 49 31 40 44 34 41 40 - 67 0 0 32 59 16 8 9 2 22 117 -15 32 46 58 33 11 39 31 30 50 34 31 17 - 68 0 0 32 49 48 8 9 0 22 116 -15 32 37 31 33 2 9 31 21 34 34 21 34 - 69 0 0 32 40 59 8 8 58 21 115 -16 32 28 44 32 53 18 31 12 57 34 12 32 - 70 0 0 32 32 50 8 8 55 20 114 -17 32 20 36 32 45 8 31 4 59 34 4 10 - 71 0 0 32 25 21 8 8 53 20 114 -18 32 13 8 32 37 37 30 57 40 33 56 30 - 72 0 0 32 18 31 8 8 51 19 113 -18 32 6 20 32 30 46 30 51 0 33 49 30 - 73 0 0 32 12 22 8 8 49 18 112 -19 32 0 12 32 24 35 30 44 59 33 43 11 - 74 0 0 32 6 52 8 8 47 17 112 -20 31 54 43 32 19 5 30 39 37 33 37 33 - 75 0 0 32 2 2 8 8 46 17 111 -20 31 49 55 32 14 14 30 34 54 33 32 35 - 76 0 0 31 57 53 8 8 44 16 110 -21 31 45 46 32 10 3 30 30 50 33 28 19 - 77 0 0 31 54 23 8 8 42 15 110 -22 31 42 17 32 6 33 30 27 25 33 24 43 - 78 0 0 31 51 33 8 8 41 14 109 -22 31 39 27 32 3 42 30 24 40 33 21 49 - 79 0 0 31 49 23 8 8 39 13 109 -23 31 37 18 32 1 32 30 22 33 33 19 35 - 80 0 0 31 47 53 8 8 38 13 108 -24 31 35 49 32 0 2 30 21 6 33 18 2 - 81 0 0 31 47 3 8 8 36 12 107 -24 31 34 59 31 59 11 30 20 18 33 17 10 - 82 0 0 31 46 53 8 8 35 11 107 -25 31 34 49 31 59 1 30 20 8 33 16 59 - 83 0 0 31 47 23 8 8 34 10 106 -25 31 35 18 31 59 31 30 20 38 33 17 28 - 84 0 0 31 48 32 8 8 33 9 106 -26 31 36 28 32 0 40 30 21 47 33 18 39 - 85 0 0 31 50 21 8 8 32 8 105 -27 31 38 16 32 2 29 30 23 34 33 20 29 - 86 0 0 31 52 50 8 8 31 8 105 -27 31 40 45 32 4 59 30 26 1 33 23 1 - 87 0 0 31 55 58 8 8 30 7 104 -28 31 43 53 32 8 7 .. .. .. 33 26 13 - 88 0 0 31 59 46 8 8 30 6 103 -28 31 47 40 32 11 56 .. .. .. 33 30 5 - 89 0 0 32 4 13 8 8 29 5 103 -28 31 52 7 32 16 24 .. .. .. 33 34 38 - 90 0 0 32 9 20 8 8 28 4 102 -29 31 57 12 32 21 31 .. .. .. 33 39 51 - 91 0 0 32 15 6 8 8 28 3 102 -29 32 2 57 32 27 18 .. .. .. 33 45 44 - 92 0 0 32 21 30 8 8 28 3 101 -30 32 9 21 32 33 44 .. .. .. 33 52 17 - 93 0 0 32 28 34 8 8 27 2 101 -30 32 16 24 32 40 49 .. .. .. 33 59 30 - 94 0 0 32 36 17 8 8 27 1 100 -30 32 24 5 32 48 33 .. .. .. 34 7 23 Uncertainty in time = +/- 4 secs [Prediction of 2008 Apr 13.0] Data for the target star ------------------------ * name: TYC 5822-00304-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 23 24 25.6867 DE: -08 11 06.737 * position source: mpos:TYC pm:TYC * standard error: RA,DE ["]: ( .027, .029 ) * V mag [mag]: 8.9 * B mag [mag]: 9.8 * Apparent position with proper motion RA(deg): 351.2162745466 DE(deg): -8.1387489093 * Equation of equinoxes (radians) : 0.000040255688860 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3193) Elliot approx. diameter [km]: 25 approx. diameter ["]: .014 distance from Earth [AU]: 2.52400 * orbital information: orbit source: Preston date of fit: 2008 Feb 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 563 number of rejected observations: 21 time covered by the observations: 1977 Nov 10 - 2007 Sep 06 1 sigma uncertainty ellipse (major, minor, PA): 0.050, 0.034, 61° remarks: * orbital elements for (3193) Elliot : Mean anomaly = 246.85990117 deg Arg. of pericenter = 76.67326796 deg Long. of node = 11.83624603 deg Inclination = 5.73233920 deg Eccentricity = 0.10529211 Semimajor axis = 2.29577881 AU Perihelion dist = 2.05405142 AU Mag: H = 13.01, G = 0.15 Epoch of elements : MJD 54607.34100000 TDT (2008 May 21.341) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 21 3193 Elliot 8h 10.7m UT 8.9 23 24 25.687- 8 11 6.74TYC 5822-00304-1 9.8 18.4 25 0.9 2.524 3.309 20.77 -10.9015 -8.190 56.49 20.29 8.1776 -0.32114 0.76189 14.10066 5.95981 -0.00469 -0.00213 2000 244.7798972008 514.00000 76.673268 11.836246 5.7323390.10529211 2.2957788 2.054051413.4 5.00.15 RATE 2.8334070 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.056 0.044 67 4.15 0.044 0 54569.5020080521_0304-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 13, 03:42 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org