IOTA/IOTA-ES occultation update for (59) Elpis / TYC 0265-01149-1 event on 2009 Nov 08, 10:10 UT Visible from Summary ------- On 2009 Nov 08 UT, the 165 km diameter asteroid (59) Elpis will occult a 11.5 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.3 mag to 13.7 mag (the magnitude of the asteroid) for at most 5.4 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 Nov 08, 10:08 - 2009 Nov 08, 10:09 UT * magnitude of target star: 11.5 * magnitude drop [mag]: 2.3 * estimated maximum duration [s]: 5.4 * Moon: 64 % sunlit, 47° distance * Sun: 59° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 202 * 1 sigma uncertainty interval [path widths]: +/- 0.34 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .025 +/- .023) * 1 sigma uncertainty ellipse (major, minor, PA): ( .025", .023", 93° ) * approx speed of asteroid's shadow [km/s]: 30.4441 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0265-01149-1 by 59 Elpis on 2009 Nov 8 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 -126 0 0 55 39 31 10 8 3 1 86 -45 54 45 2 56 34 36 54 8 20 57 12 25 -125 0 0 55 42 0 10 8 3 1 87 -44 54 47 34 56 37 3 54 10 53 57 14 51 -124 0 0 55 44 14 10 8 3 2 88 -44 54 49 49 56 39 15 54 13 9 57 17 2 -123 0 0 55 46 13 10 8 3 2 88 -44 54 51 50 56 41 12 54 15 11 57 18 58 -122 0 0 55 47 56 10 8 3 3 89 -43 54 53 35 56 42 55 54 16 57 57 20 40 -121 0 0 55 49 25 10 8 3 3 90 -43 54 55 4 56 44 22 54 18 27 57 22 6 -120 0 0 55 50 38 10 8 3 4 91 -42 54 56 18 56 45 34 54 19 42 57 23 17 -119 0 0 55 51 36 10 8 3 4 92 -42 54 57 17 56 46 31 54 20 41 57 24 14 -118 0 0 55 52 19 10 8 4 5 93 -41 54 58 1 56 47 13 54 21 25 57 24 56 -117 0 0 55 52 47 10 8 4 6 93 -41 54 58 29 56 47 41 54 21 54 57 25 23 -116 0 0 55 52 59 10 8 4 6 94 -40 54 58 42 56 47 53 54 22 7 57 25 35 -115 0 0 55 52 57 10 8 4 7 95 -40 54 58 39 56 47 50 54 22 4 57 25 32 -114 0 0 55 52 39 10 8 5 7 96 -40 54 58 21 56 47 33 54 21 46 57 25 14 -113 0 0 55 52 6 10 8 5 8 97 -39 54 57 48 56 47 0 54 21 13 57 24 42 -112 0 0 55 51 18 10 8 5 8 98 -39 54 57 0 56 46 12 54 20 24 57 23 55 -111 0 0 55 50 14 10 8 6 9 98 -38 54 55 56 56 45 10 54 19 20 57 22 53 -110 0 0 55 48 56 10 8 6 10 99 -38 54 54 36 56 43 52 54 18 0 57 21 35 -109 0 0 55 47 22 10 8 7 10 100 -37 54 53 2 56 42 19 54 16 24 57 20 3 -108 0 0 55 45 33 10 8 7 11 101 -37 54 51 11 56 40 31 54 14 33 57 18 16 -107 0 0 55 43 29 10 8 8 11 102 -36 54 49 6 56 38 29 54 12 27 57 16 15 -106 0 0 55 41 9 10 8 8 12 103 -36 54 46 44 56 36 11 54 10 4 57 13 58 -105 0 0 55 38 34 10 8 9 12 103 -35 54 44 8 56 33 37 54 7 27 57 11 26 -104 0 0 55 35 44 10 8 9 13 104 -35 54 41 15 56 30 49 54 4 33 57 8 39 -103 0 0 55 32 38 10 8 10 13 105 -34 54 38 8 56 27 45 54 1 24 57 5 37 -102 0 0 55 29 17 10 8 10 14 106 -34 54 34 44 56 24 26 53 57 59 57 2 19 -101 0 0 55 25 40 10 8 11 15 107 -33 54 31 5 56 20 52 53 54 18 56 58 47 -100 0 0 55 21 48 10 8 12 15 108 -33 54 27 10 56 17 3 53 50 22 56 54 59 - 99 0 0 55 17 40 10 8 12 16 109 -32 54 23 0 56 12 58 53 46 9 56 50 56 - 98 0 0 55 13 17 10 8 13 16 109 -32 54 18 33 56 8 37 53 41 41 56 46 38 - 97 0 0 55 8 37 10 8 14 17 110 -31 54 13 51 56 4 2 53 36 57 56 42 5 - 96 0 0 55 3 43 10 8 15 17 111 -31 54 8 53 55 59 10 53 31 56 56 37 16 - 95 0 0 54 58 32 10 8 15 18 112 -30 54 3 39 55 54 3 53 26 40 56 32 11 - 94 0 0 54 53 6 10 8 16 19 113 -29 53 58 9 55 48 40 53 21 8 56 26 51 - 93 0 0 54 47 23 10 8 17 19 114 -29 53 52 23 55 43 2 53 15 19 56 21 15 - 92 0 0 54 41 25 10 8 18 20 115 -28 53 46 21 55 37 8 53 9 14 56 15 24 - 91 0 0 54 35 11 10 8 19 20 115 -28 53 40 2 55 30 58 53 2 53 56 9 16 - 90 0 0 54 28 40 10 8 20 21 116 -27 53 33 28 55 24 32 52 56 16 56 2 54 - 89 0 0 54 21 54 10 8 21 21 117 -27 53 26 37 55 17 49 52 49 22 55 56 15 - 88 0 0 54 14 51 10 8 22 22 118 -26 53 19 30 55 10 51 52 42 12 55 49 20 - 87 0 0 54 7 32 10 8 23 23 119 -26 53 12 6 55 3 37 52 34 45 55 42 9 - 86 0 0 53 59 57 10 8 24 23 120 -25 53 4 26 54 56 7 52 27 2 55 34 42 - 85 0 0 53 52 5 10 8 25 24 121 -24 52 56 29 54 48 20 52 19 3 55 26 59 - 84 0 0 53 43 57 10 8 26 24 122 -24 52 48 16 54 40 17 52 10 46 55 19 0 - 83 0 0 53 35 33 10 8 27 25 123 -23 52 39 47 54 31 58 52 2 13 55 10 44 - 82 0 0 53 26 51 10 8 28 25 123 -23 52 31 0 54 23 22 51 53 23 55 2 12 - 81 0 0 53 17 54 10 8 29 26 124 -22 52 21 57 54 14 30 51 44 16 54 53 24 - 80 0 0 53 8 39 10 8 31 27 125 -21 52 12 37 54 5 21 51 34 53 54 44 19 - 79 0 0 52 59 8 10 8 32 27 126 -21 52 3 0 53 55 56 51 25 12 54 34 57 - 78 0 0 52 49 20 10 8 33 28 127 -20 51 53 7 53 46 13 51 15 15 54 25 19 - 77 0 0 52 39 15 10 8 35 28 128 -20 51 42 56 53 36 15 51 5 1 54 15 24 - 76 0 0 52 28 53 10 8 36 29 129 -19 51 32 28 53 25 59 50 54 29 54 5 13 - 75 0 0 52 18 14 10 8 37 30 130 -18 51 21 44 53 15 26 50 43 41 53 54 44 - 74 0 0 52 7 18 10 8 39 30 131 -18 51 10 42 53 4 36 50 32 35 53 43 59 - 73 0 0 51 56 6 10 8 40 31 132 -17 50 59 23 52 53 30 50 21 12 53 32 57 - 72 0 0 51 44 36 10 8 42 31 133 -16 50 47 47 52 42 6 50 9 32 53 21 38 - 71 0 0 51 32 49 10 8 43 32 134 -16 50 35 54 52 30 25 49 57 35 53 10 1 - 70 0 0 51 20 44 10 8 45 32 135 -15 50 23 44 52 18 28 49 45 20 52 58 8 - 69 0 0 51 8 23 10 8 47 33 136 -15 50 11 16 52 6 13 49 32 49 52 45 58 - 68 0 0 50 55 44 10 8 48 34 137 -14 49 58 31 51 53 40 49 20 0 52 33 30 - 67 0 0 50 42 49 10 8 50 34 138 -13 49 45 29 51 40 51 49 6 53 52 20 45 - 66 0 0 50 29 35 10 8 52 35 139 -13 49 32 10 51 27 45 48 53 30 52 7 43 - 65 0 0 50 16 5 10 8 53 35 140 -12 49 18 33 51 14 21 48 39 49 51 54 24 - 64 0 0 50 2 18 10 8 55 36 141 -11 49 4 39 51 0 40 48 25 51 51 40 48 - 63 0 0 49 48 13 10 8 57 37 142 -11 48 50 28 50 46 42 48 11 36 51 26 54 - 62 0 0 49 33 51 10 8 59 37 143 -10 48 36 0 50 32 26 47 57 4 51 12 43 - 61 0 0 49 19 12 10 9 1 38 144 -9 48 21 15 50 17 54 47 42 15 50 58 15 - 60 0 0 49 4 16 10 9 3 38 145 -8 48 6 13 50 3 4 47 27 8 50 43 30 - 59 0 0 48 49 3 10 9 5 39 146 -8 47 50 53 49 47 57 47 11 45 50 28 28 - 58 0 0 48 33 33 10 9 7 40 147 -7 47 35 17 49 32 33 46 56 4 50 13 8 - 57 0 0 48 17 46 10 9 9 40 148 -6 47 19 24 49 16 52 46 40 7 49 57 32 - 56 0 0 48 1 42 10 9 11 41 149 -6 47 3 14 49 0 55 46 23 53 49 41 38 - 55 0 0 47 45 21 10 9 13 41 150 -5 46 46 47 48 44 40 46 7 23 49 25 28 - 54 0 0 47 28 43 10 9 15 42 152 -4 46 30 4 48 28 9 45 50 36 49 9 1 - 53 0 0 47 11 49 10 9 17 42 153 -3 46 13 4 48 11 21 45 33 32 48 52 17 - 52 0 0 46 54 39 10 9 20 43 154 -3 45 55 48 47 54 16 45 16 13 48 35 17 - 51 0 0 46 37 13 10 9 22 44 155 -2 45 38 16 47 36 55 44 58 37 48 18 0 - 50 0 0 46 19 30 10 9 24 44 156 -1 45 20 28 47 19 18 44 40 45 48 0 27 - 49 0 0 46 1 31 10 9 27 45 158 0 45 2 24 47 1 25 44 22 38 47 42 37 Uncertainty in time = +/- 2 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 0265-01149-1 * constellation : Leo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 11 06 32.4655 DE: +02 46 01.476 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .022, .022 ) * V mag [mag]: 11.5 * B mag [mag]: 11.8 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (59) Elpis approx. diameter [km]: 165 approx. diameter ["]: .070 distance from Earth [AU]: 3.25800 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 885 number of rejected observations: 114 time covered by the observations: 1900 Sep 20 - 2007 Dec 05 1 sigma uncertainty ellipse (major, minor, PA): 0.011, 0.008, 103° remarks: * orbital elements for (59) Elpis : Mean anomaly = 116.27896903 deg Arg. of pericenter = 211.53475168 deg Long. of node = 170.15398050 deg Inclination = 8.63327406 deg Eccentricity = 0.11698404 Semimajor axis = 2.71439286 AU Perihelion dist = 2.39685221 AU Mag: H = 7.92, G = 0.15 Epoch of elements : MJD 55143.42400000 TDT (2009 Nov 08.424) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Nov 8 59 Elpis 10h 10.9m UT 11.5 11 6 32.465 2 46 1.48TYC 0265-01149-1 11.8 13.7 165 5.4 3.258 2.904 -16.05 -33.8213 2.772 23.22 -16.67 10.1815 0.20019 0.54044 16.12187 -5.94623 -0.00470 0.00182 2000 115.524348200911 5.00000211.534752170.153981 8.6332740.11698404 2.7143929 2.3968522 7.9 5.00.15 RATE 2.2039160 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.025 0.023 93 1.34 0.023 0 54545.5020091108_1149-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 16:15 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org