IOTA/IOTA-ES occultation update for (185) Eunike / TYC 5343-00009-1 event on 2003 Nov 16, 13:21 UT Visible from W USA, Hawaii, N Australia Summary ------- On 2003 Nov 16 UT, the 157 km diameter asteroid (185) Eunike will occult a 9.7 mag star in the constellation Lepus for observers along a path across W USA, Hawaii, N Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.0 mag to 11.5 mag (the magnitude of the asteroid) for at most 16.3 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Ron Stone, TMO astrometry for the asteroid kindly provided by Bill Owen, Observatoire de Geneve astrometry for the asteroid kindly provided by Raoul Behrend, 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: 2003 Nov 16, 13:13 - 2003 Nov 16, 13:34 UT * magnitude of target star: 9.7 * magnitude drop [mag]: 2.0 * estimated maximum duration [s]: 16.3 * Moon: 56 % sunlit, 69° distance * Sun: 138° distance * rough path description: W USA, Hawaii, N Australia The occultation path -------------------- * approximate projected width [km]: 164 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 3.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .031 +/- .028) * 1 sigma uncertainty ellipse (major, minor, PA): ( .031", .028", 82° ) * approx speed of asteroid's shadow [km/s]: 9.6473 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5343-00009-1 by 185 Eunike on 2003 Nov 16 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 88 0 0 -12 50 37 13 34 30 1 103 -19 -12 4 38 -13 36 24 -11 44 20 -13 56 29 89 0 0 -13 4 7 13 34 30 2 103 -20 -12 18 14 -13 49 47 -11 57 59 -14 9 49 90 0 0 -13 17 1 13 34 30 3 103 -21 -12 31 15 -14 2 35 -12 11 2 -14 22 35 91 0 0 -13 29 20 13 34 29 4 103 -21 -12 43 39 -14 14 48 -12 23 29 -14 34 45 92 0 0 -13 41 3 13 34 28 5 102 -22 -12 55 28 -14 26 26 -12 35 21 -14 46 20 93 0 0 -13 52 11 13 34 27 5 102 -23 -13 6 41 -14 37 28 -12 46 36 -14 57 21 94 0 0 -14 2 43 13 34 26 6 102 -24 -13 17 19 -14 47 56 -12 57 17 -15 7 46 95 0 0 -14 12 41 13 34 25 7 102 -24 -13 27 22 -14 57 49 -13 7 21 -15 17 37 96 0 0 -14 22 4 13 34 23 8 102 -25 -13 36 49 -15 7 7 -13 16 51 -15 26 53 97 0 0 -14 30 52 13 34 21 9 101 -26 -13 45 42 -15 15 51 -13 25 45 -15 35 35 98 0 0 -14 39 5 13 34 19 10 101 -27 -13 53 59 -15 24 0 -13 34 5 -15 43 43 99 0 0 -14 46 45 13 34 17 11 101 -28 -14 1 42 -15 31 36 -13 41 49 -15 51 16 100 0 0 -14 53 49 13 34 14 12 101 -28 -14 8 50 -15 38 37 -13 48 59 -15 58 16 101 0 0 -15 0 20 13 34 12 13 100 -29 -14 15 24 -15 45 4 -13 55 34 -16 4 42 102 0 0 -15 6 16 13 34 9 14 100 -30 -14 21 24 -15 50 58 -14 1 35 -16 10 34 103 0 0 -15 11 39 13 34 6 15 100 -31 -14 26 49 -15 56 17 -14 7 2 -16 15 53 104 0 0 -15 16 27 13 34 3 16 100 -31 -14 31 40 -16 1 4 -14 11 54 -16 20 38 105 0 0 -15 20 42 13 34 0 17 99 -32 -14 35 57 -16 5 16 -14 16 12 -16 24 49 106 0 0 -15 24 23 13 33 56 18 99 -33 -14 39 40 -16 8 56 -14 19 56 -16 28 28 107 0 0 -15 27 31 13 33 53 19 99 -34 -14 42 50 -16 12 2 -14 23 7 -16 31 33 108 0 0 -15 30 6 13 33 49 20 99 -34 -14 45 26 -16 14 34 -14 25 43 -16 34 5 109 0 0 -15 32 7 13 33 45 21 98 -35 -14 47 28 -16 16 34 -14 27 46 -16 36 5 110 0 0 -15 33 34 13 33 41 22 98 -36 -14 48 57 -16 18 1 -14 29 15 -16 37 31 111 0 0 -15 34 29 13 33 36 23 98 -37 -14 49 52 -16 18 55 -14 30 11 -16 38 25 112 0 0 -15 34 50 13 33 32 24 98 -37 -14 50 14 -16 19 16 -14 30 33 -16 38 46 113 0 0 -15 34 39 13 33 27 25 98 -38 -14 50 3 -16 19 4 -14 30 22 -16 38 34 114 0 0 -15 33 54 13 33 22 26 97 -39 -14 49 18 -16 18 20 -14 29 37 -16 37 49 115 0 0 -15 32 37 13 33 17 26 97 -39 -14 48 1 -16 17 3 -14 28 19 -16 36 32 116 0 0 -15 30 47 13 33 12 27 97 -40 -14 46 10 -16 15 13 -14 26 29 -16 34 43 117 0 0 -15 28 24 13 33 7 28 97 -41 -14 43 46 -16 12 51 -14 24 5 -16 32 21 118 0 0 -15 25 28 13 33 1 29 97 -42 -14 40 50 -16 9 56 -14 21 7 -16 29 27 119 0 0 -15 22 0 13 32 56 30 97 -42 -14 37 20 -16 6 29 -14 17 37 -16 26 0 120 0 0 -15 17 59 13 32 50 31 96 -43 -14 33 18 -16 2 30 -14 13 34 -16 22 1 121 0 0 -15 13 25 13 32 44 32 96 -44 -14 28 42 -15 57 58 -14 8 58 -16 17 30 122 0 0 -15 8 19 13 32 38 33 96 -44 -14 23 34 -15 52 54 -14 3 49 -16 12 27 123 0 0 -15 2 41 13 32 32 34 96 -45 -14 17 54 -15 47 17 -13 58 8 -16 6 52 124 0 0 -14 56 30 13 32 25 35 96 -46 -14 11 40 -15 41 9 -13 51 53 -16 0 44 125 0 0 -14 49 46 13 32 19 36 96 -47 -14 4 54 -15 34 28 -13 45 6 -15 54 4 126 0 0 -14 42 30 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13 40 54 47 -110 0 0 42 25 34 13 13 37 9 243 -11 43 14 38 41 36 44 43 36 18 41 15 20 -109 0 0 42 45 24 13 13 35 8 243 -10 43 34 18 41 56 44 43 55 53 41 35 23 -108 0 0 43 4 44 13 13 34 8 244 -10 43 53 29 42 16 14 44 15 0 41 54 57 -107 0 0 43 23 36 13 13 33 7 245 -9 44 12 11 42 35 15 44 33 38 42 14 3 -106 0 0 43 41 59 13 13 32 6 245 -8 44 30 24 42 53 48 44 51 47 42 32 40 -105 0 0 43 59 53 13 13 31 5 246 -8 44 48 9 43 11 51 45 9 27 42 50 47 -104 0 0 44 17 19 13 13 30 4 247 -7 45 5 25 43 29 27 45 26 40 43 8 27 -103 0 0 44 34 17 13 13 29 4 248 -7 45 22 14 43 46 33 45 43 24 43 25 37 -102 0 0 44 50 46 13 13 29 3 248 -6 45 38 34 44 3 12 45 59 40 43 42 20 -101 0 0 45 6 48 13 13 29 2 249 -6 45 54 26 44 19 22 46 15 28 43 58 34 -100 0 0 45 22 21 13 13 28 1 250 -5 46 9 51 44 35 4 46 30 49 44 14 20 - 99 0 0 45 37 27 13 13 28 1 250 -4 46 24 48 44 50 19 46 45 42 44 29 38 - 98 0 0 .. .. .. .. .. .. .. .. .. .. .. .. 45 5 6 .. .. .. 44 44 29 Data for the target star ------------------------ * name: TYC 5343-00009-1 * constellation : Lepus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 17 02.2930 DE: -13 09 39.237 * position source: Pos: UCAC2, pm: UCAC2, pi: * standard error: RA,DE ["]: ( .019, .023 ) * V mag [mag]: 9.7 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (185) Eunike approx. diameter [km]: 157 approx. diameter ["]: .130 distance from Earth [AU]: 1.66400 * orbital information: orbit source: Preston date of fit: 2003 Oct 12 source of used astrometry: FASTT TMO Geneva MPC (via Astdys) number of used observations: 1028 number of rejected observations: 58 time covered by the observations: 1905 Mar 13 - 2003 Oct 05 1 sigma uncertainty ellipse (major, minor, PA): 0.025, 0.017, 77° remarks: * orbital elements for (185) Eunike : Mean anomaly = 39.21997981 deg Arg. of pericenter = 223.14907238 deg Long. of node = 154.05816972 deg Inclination = 23.25259089 deg Eccentricity = 0.12770202 Semimajor axis = 2.73812652 AU Perihelion dist = 2.38846223 AU Mag: H = 7.55, G = 0.15 Epoch of elements : MJD 52959.55700000 TDT (2003 Nov 16.557) ------ occelmnt file for Occult BEGIN ------------------------------------ 2003 Nov 16 185 Eunike 13h 24.0m UT 9.7 5 17 2.293-13 9 39.24TYC 5343-00009-1 0.0 11.5 157 16.3 1.664 -1.705 -14.42 -176.943 -13.157 -24.81 -18.72 13.3996 -.14740 .25468 -4.71068 -2.73124 -0.00259 0.00289 2000 37.1410237200311 7.00000223.149072154.058170 23.2525910.127702022.738126522.388462237.555 0.15 RATE 2.1753232 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 ------ occelmnt file for Occult END ------------------------------------ ============================================ Calculator (s): Steve Preston Date of update: 2003 Oct 13, 23:03 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@ acm.org