IOTA/IOTA-ES occultation update for (1030) Vitja / UCAC2 31189712 event on 2007 Jul 03, 02:38 UT Visible from Africa, Venezuela, Colombia Summary ------- On 2007 Jul 03 UT, the 64 km diameter asteroid (1030) Vitja will occult a 11.8 mag star in the constellation Ophiuchus 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 3.1 mag to 14.9 mag (the magnitude of the asteroid) for at most 6.8 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: 57 * date and approx. time of event: 2007 Jul 03, 02:26 - 2007 Jul 03, 02:49 UT * magnitude of target star: 11.8 * magnitude drop [mag]: 3.1 * estimated maximum duration [s]: 6.8 * Moon: 93 % sunlit, 58° distance * Sun: 148° distance * rough path description: Africa, Venezuela, Colombia The occultation path -------------------- * approximate projected width [km]: 65 * 1 sigma uncertainty interval [path widths]: +/- 1.10 * 1 sigma uncertainty interval [seconds]: +/- 8.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .054 +/- .047) * 1 sigma uncertainty ellipse (major, minor, PA): ( .054", .047", 89° ) * approx speed of asteroid's shadow [km/s]: 9.3844 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 31189712 by 1030 Vitja on 2007 Jul 03 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 -155 0 0 1 12 19 2 49 8 0 92 22 1 30 5 0 54 34 2 9 15 .. .. .. -154 0 0 1 10 39 2 49 7 1 92 21 1 28 25 0 52 54 2 7 35 .. .. .. -153 0 0 1 9 11 2 49 7 2 92 20 1 26 57 0 51 27 2 6 7 0 12 28 -152 0 0 1 7 56 2 49 6 3 92 19 1 25 42 0 50 11 2 4 51 0 11 13 -151 0 0 1 6 52 2 49 6 4 92 19 1 24 38 0 49 8 2 3 47 0 10 10 -150 0 0 1 6 1 2 49 5 5 92 18 1 23 46 0 48 16 2 2 55 0 9 18 -149 0 0 1 5 21 2 49 3 6 92 17 1 23 7 0 47 37 2 2 15 0 8 39 -148 0 0 1 4 54 2 49 2 7 92 16 1 22 39 0 47 10 2 1 48 0 8 12 -147 0 0 1 4 39 2 49 0 8 92 15 1 22 24 0 46 54 2 1 32 0 7 57 -146 0 0 1 4 35 2 48 58 9 92 14 1 22 21 0 46 51 2 1 29 0 7 54 -145 0 0 1 4 44 2 48 56 10 92 13 1 22 29 0 47 0 2 1 37 0 8 2 -144 0 0 1 5 4 2 48 54 11 92 12 1 22 50 0 47 20 2 1 58 0 8 23 -143 0 0 1 5 37 2 48 52 12 92 11 1 23 22 0 47 53 2 2 30 0 8 55 -142 0 0 1 6 21 2 48 49 13 92 10 1 24 6 0 48 37 2 3 14 0 9 40 -141 0 0 1 7 17 2 48 46 14 92 9 1 25 2 0 49 33 2 4 10 0 10 36 -140 0 0 1 8 25 2 48 43 15 92 9 1 26 10 0 50 41 2 5 18 0 11 43 -139 0 0 1 9 44 2 48 40 16 92 8 1 27 30 0 52 0 2 6 38 0 13 3 -138 0 0 1 11 16 2 48 36 17 92 7 1 29 1 0 53 31 2 8 10 0 14 34 -137 0 0 1 12 59 2 48 33 18 92 6 1 30 44 0 55 14 2 9 53 0 16 16 -136 0 0 1 14 53 2 48 29 19 92 5 1 32 39 0 57 8 2 11 47 0 18 10 -135 0 0 1 16 59 2 48 25 20 92 4 1 34 45 0 59 14 2 13 53 0 20 16 -134 0 0 1 19 16 2 48 21 21 92 3 1 37 2 1 1 31 2 16 11 0 22 33 -133 0 0 1 21 45 2 48 16 22 92 2 1 39 31 1 4 0 2 18 40 0 25 1 -132 0 0 1 24 25 2 48 12 23 93 1 1 42 11 1 6 40 2 21 20 0 27 41 -131 0 0 1 27 16 2 48 7 24 93 1 1 45 2 1 9 31 2 24 12 0 30 32 -130 0 0 1 30 19 2 48 2 25 93 0 1 48 5 1 12 33 2 27 15 0 33 34 -129 0 0 1 33 32 2 47 57 26 93 -1 1 51 19 1 15 47 2 30 29 0 36 47 -128 0 0 1 36 57 2 47 51 27 93 -2 1 54 43 1 19 11 2 33 54 0 40 11 -127 0 0 1 40 32 2 47 46 28 93 -3 1 58 19 1 22 46 2 37 30 0 43 46 -126 0 0 1 44 18 2 47 40 29 93 -4 2 2 5 1 26 33 2 41 17 0 47 32 -125 0 0 1 48 16 2 47 34 30 93 -5 2 6 3 1 30 30 2 45 15 0 51 28 -124 0 0 1 52 23 2 47 28 31 93 -6 2 10 11 1 34 37 2 49 23 0 55 35 -123 0 0 1 56 42 2 47 22 32 93 -6 2 14 29 1 38 55 2 53 42 0 59 53 -122 0 0 2 1 11 2 47 16 33 93 -7 2 18 59 1 43 24 2 58 12 1 4 21 -121 0 0 2 5 50 2 47 9 34 94 -8 2 23 38 1 48 3 3 2 52 1 9 0 -120 0 0 2 10 40 2 47 3 35 94 -9 2 28 28 1 52 53 3 7 42 1 13 49 -119 0 0 2 15 40 2 46 56 36 94 -10 2 33 28 1 57 52 3 12 43 1 18 48 -118 0 0 2 20 50 2 46 49 37 94 -11 2 38 38 2 3 2 3 17 54 1 23 57 -117 0 0 2 26 10 2 46 42 38 94 -12 2 43 59 2 8 22 3 23 15 1 29 17 -116 0 0 2 31 40 2 46 34 39 94 -12 2 49 29 2 13 52 3 28 45 1 34 46 -115 0 0 2 37 19 2 46 27 40 94 -13 2 55 9 2 19 31 3 34 26 1 40 25 -114 0 0 2 43 9 2 46 19 41 95 -14 3 0 59 2 25 20 3 40 16 1 46 13 -113 0 0 2 49 8 2 46 12 42 95 -15 3 6 58 2 31 19 3 46 16 1 52 12 -112 0 0 2 55 17 2 46 4 42 95 -16 3 13 7 2 37 27 3 52 26 1 58 19 -111 0 0 3 1 34 2 45 56 43 95 -17 3 19 25 2 43 45 3 58 44 2 4 36 -110 0 0 3 8 2 2 45 48 44 96 -17 3 25 52 2 50 12 4 5 12 2 11 3 -109 0 0 3 14 38 2 45 39 45 96 -18 3 32 29 2 56 48 4 11 50 2 17 38 -108 0 0 3 21 23 2 45 31 46 96 -19 3 39 15 3 3 33 4 18 36 2 24 22 -107 0 0 3 28 17 2 45 22 47 96 -20 3 46 9 3 10 27 4 25 31 2 31 15 -106 0 0 3 35 20 2 45 14 48 97 -21 3 53 12 3 17 29 4 32 35 2 38 17 -105 0 0 3 42 32 2 45 5 49 97 -22 4 0 24 3 24 41 4 39 47 2 45 28 -104 0 0 3 49 52 2 44 56 50 97 -22 4 7 44 3 32 0 4 47 8 2 52 47 -103 0 0 3 57 20 2 44 47 51 98 -23 4 15 13 3 39 28 4 54 38 3 0 14 -102 0 0 4 4 57 2 44 38 52 98 -24 4 22 50 3 47 5 5 2 15 3 7 50 -101 0 0 4 12 41 2 44 28 53 98 -25 4 30 35 3 54 49 5 10 1 3 15 34 -100 0 0 4 20 34 2 44 19 54 99 -25 4 38 28 4 2 41 5 17 55 3 23 25 - 99 0 0 4 28 34 2 44 9 55 99 -26 4 46 29 4 10 42 5 25 56 3 31 25 - 98 0 0 4 36 43 2 44 0 56 100 -27 4 54 37 4 18 49 5 34 5 3 39 32 - 97 0 0 4 44 58 2 43 50 57 100 -28 5 2 53 4 27 5 5 42 22 3 47 47 - 96 0 0 4 53 21 2 43 40 57 101 -29 5 11 16 4 35 27 5 50 46 3 56 9 - 95 0 0 5 1 52 2 43 30 58 102 -29 5 19 47 4 43 57 5 59 17 4 4 38 - 94 0 0 5 10 29 2 43 20 59 102 -30 5 28 25 4 52 34 6 7 55 4 13 14 - 93 0 0 5 19 13 2 43 10 60 103 -31 5 37 9 5 1 18 6 16 41 4 21 58 - 92 0 0 5 28 4 2 43 0 61 104 -32 5 46 0 5 10 9 6 25 33 4 30 48 - 91 0 0 5 37 2 2 42 50 62 104 -32 5 54 58 5 19 6 6 34 31 4 39 44 - 90 0 0 5 46 6 2 42 39 63 105 -33 6 4 3 5 28 10 6 43 36 4 48 48 - 89 0 0 5 55 16 2 42 29 64 106 -34 6 13 14 5 37 20 6 52 48 4 57 57 - 88 0 0 6 4 33 2 42 19 65 107 -34 6 22 30 5 46 37 7 2 5 5 7 13 - 87 0 0 6 13 56 2 42 8 65 108 -35 6 31 53 5 55 59 7 11 29 5 16 34 - 86 0 0 6 23 24 2 41 57 66 109 -36 6 41 22 6 5 27 7 20 58 5 26 2 - 85 0 0 6 32 58 2 41 47 67 110 -37 6 50 56 6 15 1 7 30 33 5 35 35 - 84 0 0 6 42 37 2 41 36 68 112 -37 7 0 36 6 24 40 7 40 14 5 45 14 - 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67 0 0 9 38 3 2 38 26 78 159 -47 9 56 5 9 20 1 10 35 51 8 40 26 - 66 0 0 9 48 51 2 38 15 78 164 -48 10 6 54 9 30 50 10 46 41 8 51 14 - 65 0 0 9 59 42 2 38 4 78 169 -48 10 17 45 9 41 40 10 57 32 9 2 5 - 64 0 0 10 10 35 2 37 52 78 173 -48 10 28 38 9 52 33 11 8 25 9 12 57 - 63 0 0 10 21 29 2 37 41 78 178 -49 10 39 32 10 3 27 11 19 20 9 23 51 - 62 0 0 10 32 25 2 37 30 78 183 -49 10 50 28 10 14 23 11 30 16 9 34 46 - 61 0 0 10 43 22 2 37 18 77 187 -50 11 1 26 10 25 20 11 41 14 9 45 43 - 60 0 0 10 54 21 2 37 7 77 191 -50 11 12 24 10 36 18 11 52 12 9 56 41 - 59 0 0 11 5 20 2 36 56 77 195 -50 11 23 24 10 47 18 12 3 12 10 7 40 - 58 0 0 11 16 20 2 36 45 76 199 -51 11 34 24 10 58 18 12 14 13 10 18 40 - 57 0 0 11 27 21 2 36 33 76 202 -51 11 45 25 11 9 19 12 25 14 10 29 41 - 56 0 0 11 38 23 2 36 22 75 205 -51 11 56 26 11 20 20 12 36 15 10 40 42 - 55 0 0 11 49 24 2 36 11 75 208 -51 12 7 28 11 31 21 12 47 17 10 51 44 - 54 0 0 12 0 26 2 36 0 74 211 -52 12 18 30 11 42 23 12 58 19 11 2 45 - 53 0 0 12 11 27 2 35 49 73 214 -52 12 29 31 11 53 24 13 9 21 11 13 46 - 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38 0 0 14 54 26 2 33 10 61 236 -52 15 12 29 14 36 24 15 52 17 13 56 47 - 37 0 0 15 5 0 2 33 0 61 237 -52 15 23 3 14 46 58 16 2 50 14 7 22 - 36 0 0 15 15 30 2 32 50 60 238 -52 15 33 33 14 57 29 16 13 21 14 17 53 - 35 0 0 15 25 58 2 32 40 59 239 -52 15 44 1 15 7 56 16 23 47 14 28 21 - 34 0 0 15 36 21 2 32 31 58 240 -51 15 54 24 15 18 20 16 34 11 14 38 45 - 33 0 0 15 46 41 2 32 21 57 241 -51 16 4 44 15 28 40 16 44 30 14 49 5 - 32 0 0 15 56 57 2 32 11 56 241 -51 16 15 0 15 38 56 16 54 45 14 59 22 - 31 0 0 16 7 9 2 32 2 55 242 -51 16 25 11 15 49 8 17 4 57 15 9 34 - 30 0 0 16 17 17 2 31 53 54 243 -50 16 35 19 15 59 16 17 15 4 15 19 42 - 29 0 0 16 27 20 2 31 44 53 243 -50 16 45 22 16 9 19 17 25 6 15 29 46 - 28 0 0 16 37 18 2 31 34 53 244 -50 16 55 20 16 19 18 17 35 4 15 39 45 - 27 0 0 16 47 12 2 31 25 52 244 -49 17 5 13 16 29 12 17 44 57 15 49 40 - 26 0 0 16 57 1 2 31 17 51 245 -49 17 15 2 16 39 1 17 54 45 15 59 29 - 25 0 0 17 6 44 2 31 8 50 246 -48 17 24 45 16 48 44 18 4 27 16 9 13 - 24 0 0 17 16 22 2 30 59 49 246 -48 17 34 23 16 58 23 18 14 5 16 18 52 - 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Data for the target star ------------------------ * name: UCAC2 31189712 * constellation : Ophiuchus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 17 09 54.4945 DE: -01 44 36.568 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .041, .041 ) * V mag [mag]: 11.8 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1030) Vitja approx. diameter [km]: 64 approx. diameter ["]: .043 distance from Earth [AU]: 2.04000 * orbital information: orbit source: Preston date of fit: 2007 Jun 28 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 689 number of rejected observations: 65 time covered by the observations: 1924 Jun 06 - 2007 Jun 28 1 sigma uncertainty ellipse (major, minor, PA): 0.035, 0.023, 88° remarks: * orbital elements for (1030) Vitja : Mean anomaly = 56.90858225 deg Arg. of pericenter = 7.99348987 deg Long. of node = 187.98981475 deg Inclination = 14.77152330 deg Eccentricity = 0.12010338 Semimajor axis = 3.12422316 AU Perihelion dist = 2.74899340 AU Mag: H = 10.18, G = 0.15 Epoch of elements : MJD 54284.11000000 TDT (2007 Jul 03.110) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Jul 03 1030 Vitja 2h 38.0m UT 11.8 17 9 54.494- 1 44 36.57UCAC2 31189712 0.0 14.9 64 6.8 2.040 -1.496 -4.24 -62.785 -1.742 -218.48 23.00 2.6341 -.03862 .20269 -5.20484 -0.98277 0.00208 -0.00203 2000 56.17502672007 629.00000 7.993490187.989815 14.7715230.120103383.124223162.7489934010.35 0.15 RATE 1.7848060 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.054 0.047 89.2 2.100 0.048 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Jun 29, 02:12 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org