IOTA/IOTA-ES occultation update for (835) Olivia / UCAC2 21641037 event on 2007 Jul 04, 03:58 UT Visible from Africa, Venezuela, Colombia Summary ------- On 2007 Jul 04 UT, the 36 km diameter asteroid (835) Olivia will occult a 12.0 mag star in the constellation Sagittarius for observers along a path across Africa, Venezuela, Colombia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.3 mag to 16.2 mag (the magnitude of the asteroid) for at most 2.9 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 26 * date and approx. time of event: 2007 Jul 04, 03:51 - 2007 Jul 04, 04:05 UT * magnitude of target star: 12.0 * magnitude drop [mag]: 4.3 * estimated maximum duration [s]: 2.9 * Moon: 86 % sunlit, 42° distance * Sun: 177° distance * rough path description: Africa, Venezuela, Colombia The occultation path -------------------- * approximate projected width [km]: 41 * 1 sigma uncertainty interval [path widths]: +/- 2.55 * 1 sigma uncertainty interval [seconds]: +/- 7.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .070 +/- .059) * 1 sigma uncertainty ellipse (major, minor, PA): ( .070", .059", 84° ) * approx speed of asteroid's shadow [km/s]: 12.5573 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 21641037 by 835 Olivia on 2007 Jul 04 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 -135 0 0 24 12 30 4 5 56 1 118 -4 24 25 13 23 59 49 25 30 32 .. .. .. -134 0 0 23 43 40 4 5 56 2 119 -5 23 56 21 23 31 0 25 1 34 .. .. .. -133 0 0 23 14 57 4 5 55 3 119 -6 23 27 37 23 2 18 24 32 42 .. .. .. -132 0 0 22 46 22 4 5 55 4 119 -7 22 59 1 22 33 45 24 3 59 .. .. .. -131 0 0 22 17 57 4 5 54 5 120 -8 22 30 34 22 5 21 23 35 25 .. .. .. -130 0 0 21 49 41 4 5 53 6 120 -9 22 2 17 21 37 7 23 7 0 20 33 27 -129 0 0 21 21 37 4 5 52 7 120 -10 21 34 11 21 9 4 22 38 46 20 5 32 -128 0 0 20 53 44 4 5 50 8 121 -11 21 6 17 20 41 13 22 10 44 19 37 48 -127 0 0 20 26 3 4 5 49 9 121 -12 20 38 35 20 13 34 21 42 53 19 10 17 -126 0 0 19 58 36 4 5 47 10 122 -13 20 11 5 19 46 8 21 15 15 18 42 59 -125 0 0 19 31 22 4 5 45 11 122 -14 19 43 50 19 18 56 20 47 51 18 15 56 -124 0 0 19 4 23 4 5 43 12 122 -15 19 16 49 18 51 58 20 20 42 17 49 6 -123 0 0 18 37 39 4 5 41 13 123 -16 18 50 3 18 25 16 19 53 47 17 22 32 -122 0 0 18 11 10 4 5 38 14 123 -17 18 23 33 17 58 49 19 27 8 16 56 14 -121 0 0 17 44 59 4 5 36 15 123 -18 17 57 20 17 32 39 19 0 45 16 30 13 -120 0 0 17 19 4 4 5 33 16 124 -19 17 31 23 17 6 46 18 34 40 16 4 29 -119 0 0 16 53 27 4 5 30 17 124 -20 17 5 44 16 41 11 18 8 52 15 39 2 -118 0 0 16 28 8 4 5 27 18 124 -21 16 40 24 16 15 54 17 43 22 15 13 54 -117 0 0 16 3 8 4 5 23 19 125 -22 16 15 22 15 50 56 17 18 11 14 49 5 -116 0 0 15 38 28 4 5 20 20 125 -23 15 50 40 15 26 17 16 53 19 14 24 35 -115 0 0 15 14 7 4 5 16 21 125 -24 15 26 18 15 1 58 16 28 47 14 0 26 -114 0 0 14 50 7 4 5 12 22 126 -25 15 2 16 14 38 0 16 4 36 13 36 36 -113 0 0 14 26 28 4 5 8 23 126 -26 14 38 34 14 14 22 15 40 45 13 13 8 -112 0 0 14 3 10 4 5 4 24 126 -27 14 15 15 13 51 6 15 17 16 12 50 0 -111 0 0 13 40 13 4 5 0 25 127 -28 13 52 16 13 28 12 14 54 9 12 27 15 -110 0 0 13 17 39 4 4 55 26 127 -29 13 29 41 13 5 40 14 31 24 12 4 51 -109 0 0 12 55 28 4 4 50 27 127 -30 13 7 27 12 43 30 14 9 1 11 42 50 -108 0 0 12 33 39 4 4 46 28 128 -31 12 45 37 12 21 43 13 47 2 11 21 12 -107 0 0 12 12 14 4 4 41 29 128 -32 12 24 10 12 0 20 13 25 26 10 59 58 -106 0 0 11 51 13 4 4 35 30 129 -33 12 3 7 11 39 20 13 4 13 10 39 7 -105 0 0 11 30 35 4 4 30 31 129 -34 11 42 28 11 18 44 12 43 25 10 18 39 -104 0 0 11 10 22 4 4 25 32 129 -35 11 22 13 10 58 33 12 23 2 9 58 36 -103 0 0 10 50 34 4 4 19 33 130 -36 11 2 23 10 38 46 12 3 3 9 38 58 -102 0 0 10 31 10 4 4 14 34 130 -37 10 42 58 10 19 24 11 43 29 9 19 44 -101 0 0 10 12 12 4 4 8 35 131 -38 10 23 58 10 0 27 11 24 20 9 0 56 -100 0 0 9 53 39 4 4 2 36 131 -39 10 5 23 9 41 56 11 5 37 8 42 32 - 99 0 0 9 35 31 4 3 56 37 132 -40 9 47 14 9 23 50 10 47 20 8 24 34 - 98 0 0 9 17 50 4 3 50 38 132 -41 9 29 31 9 6 10 10 29 29 8 7 2 - 97 0 0 9 0 34 4 3 43 39 133 -42 9 12 14 8 48 56 10 12 4 7 49 56 - 96 0 0 8 43 45 4 3 37 40 133 -43 8 55 24 8 32 9 9 55 6 7 33 16 - 95 0 0 8 27 23 4 3 31 40 134 -43 8 39 0 8 15 48 9 38 34 7 17 2 - 94 0 0 8 11 27 4 3 24 41 134 -44 8 23 2 7 59 53 9 22 30 7 1 15 - 93 0 0 7 55 58 4 3 17 42 135 -45 8 7 32 7 44 25 9 6 52 6 45 54 - 92 0 0 7 40 56 4 3 10 43 135 -46 7 52 28 7 29 25 8 51 41 6 31 0 - 91 0 0 7 26 21 4 3 3 44 136 -47 7 37 52 7 14 51 8 36 58 6 16 33 - 90 0 0 7 12 13 4 2 56 45 137 -48 7 23 43 7 0 44 8 22 42 6 2 33 - 89 0 0 6 58 32 4 2 49 46 137 -49 7 10 1 6 47 5 8 8 54 5 49 0 - 88 0 0 6 45 19 4 2 42 46 138 -49 6 56 47 6 33 53 7 55 33 5 35 54 - 87 0 0 6 32 34 4 2 35 47 139 -50 6 44 0 6 21 9 7 42 41 5 23 16 - 86 0 0 6 20 16 4 2 28 48 139 -51 6 31 41 6 8 53 7 30 16 5 11 5 - 85 0 0 6 8 26 4 2 20 49 140 -52 6 19 50 5 57 4 7 18 19 4 59 22 - 84 0 0 5 57 4 4 2 13 49 141 -53 6 8 27 5 45 43 7 6 50 4 48 6 - 83 0 0 5 46 10 4 2 5 50 142 -53 5 57 32 5 34 50 6 55 50 4 37 18 - 82 0 0 5 35 44 4 1 57 51 143 -54 5 47 5 5 24 25 6 45 18 4 26 58 - 81 0 0 5 25 46 4 1 50 52 144 -55 5 37 6 5 14 27 6 35 14 4 17 5 - 80 0 0 5 16 16 4 1 42 52 145 -55 5 27 35 5 4 58 6 25 38 4 7 41 - 79 0 0 5 7 14 4 1 34 53 146 -56 5 18 33 4 55 58 6 16 31 3 58 44 - 78 0 0 4 58 41 4 1 26 54 147 -57 5 9 58 4 47 25 6 7 53 3 50 15 - 77 0 0 4 50 36 4 1 18 54 148 -57 5 1 52 4 39 20 5 59 43 3 42 15 - 76 0 0 4 42 59 4 1 10 55 149 -58 4 54 15 4 31 44 5 52 1 3 34 42 - 75 0 0 4 35 50 4 1 2 55 150 -58 4 47 5 4 24 36 5 44 49 3 27 38 - 74 0 0 4 29 10 4 0 54 56 151 -59 4 40 25 4 17 57 5 38 4 3 21 1 - 73 0 0 4 22 58 4 0 46 57 153 -60 4 34 12 4 11 46 5 31 49 3 14 53 - 72 0 0 4 17 15 4 0 38 57 154 -60 4 28 28 4 6 3 5 26 2 3 9 13 - 71 0 0 4 12 0 4 0 29 58 155 -61 4 23 13 4 0 49 5 20 44 3 4 1 - 70 0 0 4 7 14 4 0 21 58 157 -61 4 18 26 3 56 3 5 15 55 2 59 18 - 69 0 0 4 2 56 4 0 13 58 158 -61 4 14 8 3 51 45 5 11 35 2 55 2 - 68 0 0 3 59 7 4 0 4 59 160 -62 4 10 18 3 47 56 5 7 43 2 51 15 - 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51 0 0 4 6 55 3 57 40 60 189 -62 4 18 7 3 55 44 5 15 35 2 59 0 - 50 0 0 4 11 39 3 57 32 60 191 -62 4 22 52 4 0 27 5 20 22 3 3 41 - 49 0 0 4 16 51 3 57 23 60 193 -61 4 28 5 4 5 39 5 25 38 3 8 51 - 48 0 0 4 22 32 3 57 15 60 194 -61 4 33 46 4 11 20 5 31 22 3 14 28 - 47 0 0 4 28 42 3 57 6 59 196 -61 4 39 56 4 17 28 5 37 35 3 20 34 - 46 0 0 4 35 19 3 56 58 59 197 -60 4 46 34 4 24 5 5 44 16 3 27 8 - 45 0 0 4 42 25 3 56 49 58 199 -60 4 53 41 4 31 11 5 51 26 3 34 10 - 44 0 0 4 49 59 3 56 41 58 200 -59 5 1 15 4 38 44 5 59 4 3 41 40 - 43 0 0 4 58 1 3 56 33 57 202 -59 5 9 18 4 46 45 6 7 11 3 49 37 - 42 0 0 5 6 32 3 56 25 57 203 -58 5 17 50 4 55 15 6 15 47 3 58 3 - 41 0 0 5 15 30 3 56 16 56 204 -57 5 26 49 5 4 13 6 24 50 4 6 57 - 40 0 0 5 24 57 3 56 8 56 206 -57 5 36 16 5 13 38 6 34 22 4 16 18 - 39 0 0 5 34 51 3 56 0 55 207 -56 5 46 12 5 23 32 6 44 23 4 26 7 - 38 0 0 5 45 14 3 55 52 55 208 -55 5 56 35 5 33 54 6 54 51 4 36 24 - 37 0 0 5 56 4 3 55 44 54 209 -55 6 7 27 5 44 43 7 5 48 4 47 8 - 36 0 0 6 7 22 3 55 36 53 210 -54 6 18 46 5 56 0 7 17 12 4 58 20 - 35 0 0 6 19 8 3 55 28 53 212 -53 6 30 33 6 7 45 7 29 5 5 9 59 - 34 0 0 6 31 21 3 55 20 52 213 -53 6 42 47 6 19 57 7 41 25 5 22 6 - 33 0 0 6 44 2 3 55 12 51 214 -52 6 55 29 6 32 37 7 54 13 5 34 40 - 32 0 0 6 57 10 3 55 4 51 215 -51 7 8 38 6 45 44 8 7 29 5 47 41 - 31 0 0 7 10 46 3 54 57 50 215 -50 7 22 15 6 59 18 8 21 12 6 1 9 - 30 0 0 7 24 49 3 54 49 49 216 -49 7 36 19 7 13 19 8 35 22 6 15 4 - 29 0 0 7 39 18 3 54 41 48 217 -49 7 50 50 7 27 48 8 50 0 6 29 26 - 28 0 0 7 54 15 3 54 34 48 218 -48 8 5 48 7 42 43 9 5 5 6 44 14 - 27 0 0 8 9 38 3 54 27 47 219 -47 8 21 13 7 58 5 9 20 37 6 59 30 - 26 0 0 8 25 28 3 54 19 46 219 -46 8 37 4 8 13 54 9 36 36 7 15 11 - 25 0 0 8 41 45 3 54 12 45 220 -45 8 53 22 8 30 9 9 53 1 7 31 19 - 24 0 0 8 58 27 3 54 5 44 221 -44 9 10 6 8 46 50 10 9 53 7 47 53 - 23 0 0 9 15 36 3 53 58 44 222 -43 9 27 17 9 3 57 10 27 11 8 4 53 - 22 0 0 9 33 11 3 53 51 43 222 -43 9 44 53 9 21 30 10 44 55 8 22 18 - 21 0 0 9 51 11 3 53 44 42 223 -42 10 2 55 9 39 29 11 3 5 8 40 9 - 20 0 0 10 9 37 3 53 37 41 223 -41 10 21 22 9 57 53 11 21 41 8 58 26 - 19 0 0 10 28 28 3 53 31 40 224 -40 10 40 15 10 16 43 11 40 42 9 17 7 - 18 0 0 10 47 44 3 53 24 39 225 -39 10 59 32 10 35 57 12 0 8 9 36 13 - 17 0 0 11 7 24 3 53 18 38 225 -38 11 19 14 10 55 36 12 19 58 9 55 44 - 16 0 0 11 27 29 3 53 12 37 226 -37 11 39 21 11 15 39 12 40 14 10 15 39 - 15 0 0 11 47 58 3 53 5 36 226 -36 11 59 52 11 36 6 13 0 53 10 35 58 - 14 0 0 12 8 51 3 52 59 36 227 -35 12 20 46 11 56 58 13 21 57 10 56 40 - 13 0 0 12 30 8 3 52 54 35 227 -34 12 42 4 12 18 12 13 43 24 11 17 46 - 12 0 0 12 51 47 3 52 48 34 228 -33 13 3 46 12 39 50 14 5 14 11 39 16 - 11 0 0 13 13 49 3 52 42 33 228 -32 13 25 50 13 1 50 14 27 27 12 1 7 - 10 0 0 13 36 14 3 52 37 32 229 -31 13 48 16 13 24 13 14 50 3 12 23 22 - 9 0 0 13 59 1 3 52 31 31 229 -30 14 11 4 13 46 58 15 13 0 12 45 58 - 8 0 0 14 22 9 3 52 26 30 229 -29 14 34 14 14 10 5 15 36 20 13 8 55 - 7 0 0 14 45 38 3 52 21 29 230 -28 14 57 46 14 33 32 16 0 0 13 32 14 - 6 0 0 15 9 28 3 52 16 28 230 -27 15 21 37 14 57 21 16 24 1 13 55 53 - 5 0 0 15 33 38 3 52 11 27 231 -26 15 45 49 15 21 29 16 48 23 14 19 53 - 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Data for the target star ------------------------ * name: UCAC2 21641037 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 19 00 20.7963 DE: -25 08 29.316 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .040, .040 ) * V mag [mag]: 12.0 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (835) Olivia approx. diameter [km]: 36 approx. diameter ["]: .023 distance from Earth [AU]: 2.16100 * orbital information: orbit source: Preston date of fit: 2007 Jun 28 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 676 number of rejected observations: 26 time covered by the observations: 1916 Sep 30 - 2007 May 22 1 sigma uncertainty ellipse (major, minor, PA): 0.058, 0.043, 81° remarks: * orbital elements for (835) Olivia : Mean anomaly = 283.67879122 deg Arg. of pericenter = 60.43740710 deg Long. of node = 309.28171115 deg Inclination = 3.70588533 deg Eccentricity = 0.09150834 Semimajor axis = 3.21998359 AU Perihelion dist = 2.92532824 AU Mag: H = 11.43, G = 0.15 Epoch of elements : MJD 54285.16500000 TDT (2007 Jul 04.165) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Jul 04 835 Olivia 3h 58.5m UT 12.0 19 0 20.796-25 8 29.32UCAC2 21641037 0.0 16.2 36 2.9 2.161 -2.123 -0.88 -56.336 -25.141 -238.56 22.91 3.9755 -.01485 .48342 -7.08438 -0.21743 -0.00024 0.00021 2000 282.7977542007 629.00000 60.437407309.281711 3.7058850.091508343.219983592.9253282411.95 0.15 RATE 1.7057820 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.070 0.059 83.9 3.550 0.059 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Jun 29, 02:31 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org