IOTA/IOTA-ES occultation update for (692) Hippodamia / TYC 5281-00158-1 event on 2012 Nov 04, 01:36 UT Visible from Europe, NE Canada Summary ------- On 2012 Nov 04 UT, the 45 km diameter asteroid (692) Hippodamia will occult a 10.9 mag star in the constellation Cetus for observers along a path across Europe, NE Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.3 mag to 14.1 mag (the magnitude of the asteroid) for at most 2.8 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: 27 * date and approx. time of event: 2012 Nov 04, 01:32 - 2012 Nov 04, 01:40 UT * geocentric midpoint of event [JD]: 2456235.567 * magnitude of target star: 10.9 * magnitude drop [mag]: 3.3 * estimated maximum duration [s]: 2.8 * Moon: 77 % sunlit, 70° distance * Sun: 156° distance * rough path description: Europe, NE Canada The occultation path -------------------- * approximate projected width [km]: 76 * 1 sigma uncertainty interval [path widths]: +/- 2.51 * 1 sigma uncertainty interval [seconds]: +/- 7.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .073 +/- .065) * 1 sigma uncertainty ellipse (major, minor, PA): ( .073", .065", 82° ) * approx speed of asteroid's shadow [km/s]: 16.0974 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5281-00158-1 by 692 Hippodamia on 2012 Nov 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 -109 0 0 62 25 36 1 40 21 0 108 -18 62 47 30 62 3 55 .. .. .. .. .. .. -108 0 0 62 16 40 1 40 21 1 109 -19 62 38 36 61 54 57 64 31 53 .. .. .. -107 0 0 62 7 35 1 40 21 1 110 -19 62 29 32 61 45 51 64 22 58 .. .. .. -106 0 0 61 58 21 1 40 21 2 111 -20 62 20 19 61 36 35 64 13 54 .. .. .. -105 0 0 61 48 57 1 40 20 2 112 -20 62 10 57 61 27 10 64 4 41 .. .. .. -104 0 0 61 39 25 1 40 20 3 113 -21 62 1 26 61 17 36 63 55 18 .. .. .. -103 0 0 61 29 43 1 40 20 3 113 -21 61 51 46 61 7 52 63 45 46 .. .. .. -102 0 0 61 19 52 1 40 19 4 114 -22 61 41 57 60 58 0 63 36 5 .. .. .. -101 0 0 61 9 53 1 40 19 4 115 -22 61 31 59 60 47 59 63 26 14 .. .. .. -100 0 0 60 59 44 1 40 18 5 116 -23 61 21 52 60 37 50 63 16 15 .. .. .. - 99 0 0 60 49 27 1 40 18 5 117 -23 61 11 36 60 27 31 63 6 7 .. .. .. - 98 0 0 60 39 2 1 40 17 6 118 -24 61 1 12 60 17 4 62 55 50 .. .. .. - 97 0 0 60 28 28 1 40 17 6 119 -24 60 50 39 60 6 29 62 45 24 .. .. .. - 96 0 0 60 17 45 1 40 16 7 120 -25 60 39 57 59 55 45 62 34 49 .. .. .. - 95 0 0 60 6 54 1 40 15 8 120 -25 60 29 8 59 44 53 62 24 6 57 57 18 - 94 0 0 59 55 56 1 40 14 8 121 -26 60 18 10 59 33 53 62 13 15 57 46 12 - 93 0 0 59 44 49 1 40 13 9 122 -26 60 7 4 59 22 46 62 2 15 57 35 0 - 92 0 0 59 33 34 1 40 12 9 123 -27 59 55 51 59 11 30 61 51 7 57 23 39 - 91 0 0 59 22 12 1 40 11 10 124 -27 59 44 29 59 0 7 61 39 51 57 12 12 - 90 0 0 59 10 42 1 40 10 10 125 -28 59 33 0 58 48 36 61 28 27 57 0 37 - 89 0 0 58 59 4 1 40 9 11 126 -29 59 21 24 58 36 58 61 16 55 56 48 55 - 88 0 0 58 47 20 1 40 8 11 127 -29 59 9 40 58 25 12 61 5 16 56 37 6 - 87 0 0 58 35 28 1 40 7 12 127 -30 58 57 49 58 13 20 60 53 29 56 25 10 - 86 0 0 58 23 30 1 40 5 12 128 -30 58 45 51 58 1 21 60 41 35 56 13 8 - 85 0 0 58 11 25 1 40 4 13 129 -31 58 33 47 57 49 15 60 29 34 56 0 59 - 84 0 0 57 59 13 1 40 2 13 130 -31 58 21 36 57 37 3 60 17 26 55 48 45 - 83 0 0 57 46 55 1 40 1 14 131 -32 58 9 18 57 24 44 60 5 11 55 36 24 - 82 0 0 57 34 31 1 39 59 14 132 -32 57 56 55 57 12 20 59 52 50 55 23 58 - 81 0 0 57 22 1 1 39 57 15 133 -33 57 44 25 56 59 50 59 40 23 55 11 26 - 80 0 0 57 9 26 1 39 56 15 134 -34 57 31 50 56 47 14 59 27 49 54 58 49 - 79 0 0 56 56 45 1 39 54 16 135 -34 57 19 10 56 34 33 59 15 10 54 46 7 - 78 0 0 56 43 59 1 39 52 17 135 -35 57 6 24 56 21 47 59 2 25 54 33 20 - 77 0 0 56 31 8 1 39 50 17 136 -35 56 53 33 56 8 56 58 49 35 54 20 28 - 76 0 0 56 18 12 1 39 48 18 137 -36 56 40 37 55 56 0 58 36 40 54 7 32 - 75 0 0 56 5 12 1 39 46 18 138 -37 56 27 37 55 43 0 58 23 40 53 54 32 - 74 0 0 55 52 8 1 39 43 19 139 -37 56 14 33 55 29 56 58 10 35 53 41 29 - 73 0 0 55 39 0 1 39 41 19 140 -38 56 1 25 55 16 48 57 57 26 53 28 21 - 72 0 0 55 25 48 1 39 39 20 141 -38 55 48 12 55 3 36 57 44 12 53 15 11 - 71 0 0 55 12 33 1 39 36 20 142 -39 55 34 57 54 50 21 57 30 55 53 1 57 - 70 0 0 54 59 14 1 39 34 21 143 -39 55 21 38 54 37 3 57 17 35 52 48 41 - 69 0 0 54 45 53 1 39 31 21 144 -40 55 8 17 54 23 43 57 4 11 52 35 22 - 68 0 0 54 32 30 1 39 28 22 145 -41 54 54 53 54 10 19 56 50 44 52 22 1 - 67 0 0 54 19 4 1 39 26 22 146 -41 54 41 26 53 56 54 56 37 15 52 8 38 - 66 0 0 54 5 36 1 39 23 23 147 -42 54 27 58 53 43 27 56 23 44 51 55 13 - 65 0 0 53 52 7 1 39 20 23 147 -42 54 14 28 53 29 58 56 10 10 51 41 48 - 64 0 0 53 38 36 1 39 17 24 148 -43 54 0 57 53 16 28 55 56 35 51 28 21 - 63 0 0 53 25 4 1 39 14 24 149 -44 53 47 24 53 2 57 55 42 58 51 14 54 - 62 0 0 53 11 32 1 39 11 25 150 -44 53 33 51 52 49 26 55 29 20 51 1 26 - 61 0 0 52 57 59 1 39 8 25 151 -45 53 20 17 52 35 54 55 15 42 50 47 58 - 60 0 0 52 44 27 1 39 5 26 152 -45 53 6 44 52 22 22 55 2 3 50 34 30 - 59 0 0 52 30 54 1 39 1 26 153 -46 52 53 10 52 8 50 54 48 24 50 21 3 - 58 0 0 52 17 22 1 38 58 27 154 -47 52 39 37 51 55 19 54 34 45 50 7 37 - 57 0 0 52 3 51 1 38 54 27 155 -47 52 26 5 51 41 49 54 21 7 49 54 12 - 56 0 0 51 50 21 1 38 51 28 156 -48 52 12 34 51 28 21 54 7 30 49 40 48 - 55 0 0 51 36 53 1 38 47 28 157 -48 51 59 5 51 14 54 53 53 54 49 27 26 - 54 0 0 51 23 26 1 38 44 29 158 -49 51 45 37 51 1 28 53 40 20 49 14 7 - 53 0 0 51 10 2 1 38 40 29 159 -49 51 32 11 50 48 5 53 26 47 49 0 49 - 52 0 0 50 56 41 1 38 36 29 161 -50 51 18 49 50 34 45 53 13 17 48 47 35 - 51 0 0 50 43 22 1 38 32 30 162 -50 51 5 28 50 21 28 52 59 50 48 34 24 - 50 0 0 50 30 6 1 38 28 30 163 -51 50 52 11 50 8 13 52 46 25 48 21 16 - 49 0 0 50 16 54 1 38 24 31 164 -52 50 38 58 49 55 3 52 33 4 48 8 11 - 48 0 0 50 3 46 1 38 20 31 165 -52 50 25 48 49 41 56 52 19 46 47 55 11 - 47 0 0 49 50 42 1 38 16 31 166 -53 50 12 43 49 28 53 52 6 33 47 42 15 - 46 0 0 49 37 43 1 38 12 32 167 -53 49 59 42 49 15 55 51 53 24 47 29 24 - 45 0 0 49 24 48 1 38 8 32 168 -54 49 46 46 49 3 2 51 40 19 47 16 38 - 44 0 0 49 11 58 1 38 4 32 169 -54 49 33 55 48 50 14 51 27 20 47 3 57 - 43 0 0 48 59 14 1 38 0 33 170 -54 49 21 9 48 37 32 51 14 26 46 51 21 - 42 0 0 48 46 36 1 37 55 33 171 -55 49 8 29 48 24 55 51 1 37 46 38 52 - 41 0 0 48 34 4 1 37 51 33 173 -55 48 55 56 48 12 25 50 48 55 46 26 28 - 40 0 0 48 21 39 1 37 46 34 174 -56 48 43 28 48 0 1 50 36 18 46 14 12 - 39 0 0 48 9 20 1 37 42 34 175 -56 48 31 8 47 47 43 50 23 49 46 2 2 - 38 0 0 47 57 8 1 37 37 34 176 -57 48 18 54 47 35 33 50 11 27 45 49 59 - 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22 0 0 45 1 56 1 36 21 36 195 -60 45 23 16 44 40 46 47 13 26 42 57 9 - 21 0 0 44 52 27 1 36 16 36 197 -60 45 13 46 44 31 19 47 3 48 42 47 49 - 20 0 0 44 43 11 1 36 11 36 198 -60 45 4 29 44 22 4 46 54 22 42 38 41 - 19 0 0 44 34 7 1 36 6 36 199 -60 44 55 23 44 13 2 46 45 9 42 29 45 - 18 0 0 44 25 15 1 36 1 36 200 -60 44 46 30 44 4 11 46 36 8 42 21 1 - 17 0 0 44 16 36 1 35 56 36 201 -60 44 37 49 43 55 33 46 27 19 42 12 30 - 16 0 0 44 8 10 1 35 51 35 203 -60 44 29 22 43 47 8 46 18 44 42 4 11 - 15 0 0 43 59 56 1 35 46 35 204 -59 44 21 7 43 38 56 46 10 22 41 56 5 - 14 0 0 43 51 56 1 35 42 35 205 -59 44 13 6 43 30 58 46 2 14 41 48 12 - 13 0 0 43 44 9 1 35 37 35 206 -59 44 5 18 43 23 12 45 54 19 41 40 33 - 12 0 0 43 36 36 1 35 32 35 207 -59 43 57 43 43 15 40 45 46 38 41 33 7 - 11 0 0 43 29 17 1 35 27 35 208 -58 43 50 23 43 8 22 45 39 11 41 25 54 - 10 0 0 43 22 12 1 35 22 34 209 -58 43 43 16 43 1 18 45 31 58 41 18 55 - 9 0 0 43 15 21 1 35 17 34 211 -58 43 36 24 42 54 28 45 24 59 41 12 10 - 8 0 0 43 8 44 1 35 13 34 212 -58 43 29 46 42 47 52 45 18 16 41 5 40 - 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Uncertainty in time = +/- 8 secs Prediction of 2012 Oct 8.0 Data for the target star ------------------------ * name: TYC 5281-00158-1 * constellation : Cetus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 02 12 47.4338 DE: -08 01 20.357 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .066, .063 ) * V mag [mag]: 10.9 * B mag [mag]: 12.4 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (692) Hippodamia approx. diameter [km]: 45 approx. diameter ["]: .026 distance from Earth [AU]: 2.34300 * orbital information: orbit source: Preston date of fit: 2012 Oct 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 829 number of rejected observations: 34 time covered by the observations: 1901 Nov 05 - 2012 Oct 03 1 sigma uncertainty ellipse (major, minor, PA): 0.034, 0.015, 50° remarks: * orbital elements for (692) Hippodamia : Mean anomaly = 290.53030650 deg Arg. of pericenter = 54.89078192 deg Long. of node = 63.53945820 deg Inclination = 26.11140278 deg Eccentricity = 0.17066394 Semimajor axis = 3.38196343 AU Perihelion dist = 2.80478422 AU Mag: H = 8.93, G = 0.15 Epoch of elements : MJD 56235.06700000 TDT (2012 Nov 04.067) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 4 692 Hippodamia 1h 36.5m UT 10.9 2 12 47.434- 8 1 20.36TYC 5281-00158-1 12.4 14.1 45 2.8 2.343 -2.265 5.62 -34.6308 -8.023 151.78 -15.45 1.6080 0.13253 0.79621 -8.96222 1.49349 0.00060 0.00235 2000 289.72733320121030.00000 54.890782 63.539458 26.1114030.17066394 3.3819634 2.8047842 9.2 5.00.15 RATE 1.5847130 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.073 0.065 82 3.51 0.067 0 0-2 3 056208.0020121104_0158-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 07, 19:59 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org