IOTA/IOTA-ES occultation update for (482) Petrina / TYC 5131-00253-1 event on 2007 Jul 05, 00:22 UT Visible from Europe Summary ------- On 2007 Jul 05 UT, the 46 km diameter asteroid (482) Petrina will occult a 8.9 mag star in the constellation Aquila for observers along a path across Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.9 mag to 12.8 mag (the magnitude of the asteroid) for at most 4.6 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: 76 * date and approx. time of event: 2007 Jul 05, 00:14 - 2007 Jul 05, 00:30 UT * magnitude of target star: 8.9 * magnitude drop [mag]: 3.9 * estimated maximum duration [s]: 4.6 * Moon: 79 % sunlit, 49° distance * Sun: 156° distance * rough path description: Europe The occultation path -------------------- * approximate projected width [km]: 60 * 1 sigma uncertainty interval [path widths]: +/- 0.73 * 1 sigma uncertainty interval [seconds]: +/- 4.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .032 +/- .026) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .026", 88° ) * approx speed of asteroid's shadow [km/s]: 10.0737 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5131-00253-1 by 482 Petrina on 2007 Jul 05 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 - 89 0 0 29 53 58 0 30 31 0 90 5 30 10 15 29 37 46 30 34 7 .. .. .. - 88 0 0 29 53 52 0 30 31 1 91 4 30 10 8 29 37 39 30 34 0 .. .. .. - 87 0 0 29 53 57 0 30 30 2 91 3 30 10 13 29 37 45 30 34 6 .. .. .. - 86 0 0 29 54 15 0 30 30 3 92 3 30 10 31 29 38 3 30 34 24 .. .. .. - 85 0 0 29 54 46 0 30 29 4 92 2 30 11 2 29 38 33 30 34 54 .. .. .. - 84 0 0 29 55 28 0 30 28 5 93 1 30 11 44 29 39 16 30 35 36 29 15 43 - 83 0 0 29 56 23 0 30 27 5 93 0 30 12 39 29 40 11 30 36 31 29 16 38 - 82 0 0 29 57 31 0 30 26 6 94 0 30 13 47 29 41 18 30 37 39 29 17 46 - 81 0 0 29 58 50 0 30 24 7 94 -1 30 15 6 29 42 38 30 38 58 29 19 5 - 80 0 0 30 0 22 0 30 23 8 95 -2 30 16 38 29 44 9 30 40 30 29 20 37 - 79 0 0 30 2 5 0 30 21 9 95 -3 30 18 21 29 45 53 30 42 13 29 22 20 - 78 0 0 30 4 1 0 30 19 10 96 -3 30 20 17 29 47 49 30 44 9 29 24 16 - 77 0 0 30 6 8 0 30 17 11 97 -4 30 22 25 29 49 56 30 46 17 29 26 23 - 76 0 0 30 8 28 0 30 14 11 97 -5 30 24 44 29 52 16 30 48 36 29 28 43 - 75 0 0 30 10 59 0 30 12 12 98 -6 30 27 16 29 54 47 30 51 8 29 31 14 - 74 0 0 30 13 42 0 30 9 13 98 -6 30 29 59 29 57 30 30 53 51 29 33 56 - 73 0 0 30 16 37 0 30 6 14 99 -7 30 32 53 30 0 24 30 56 46 29 36 51 - 72 0 0 30 19 43 0 30 3 15 99 -8 30 36 0 30 3 30 30 59 52 29 39 56 - 71 0 0 30 23 0 0 30 0 16 100 -8 30 39 17 30 6 47 31 3 10 29 43 14 - 70 0 0 30 26 29 0 29 57 16 100 -9 30 42 46 30 10 16 31 6 40 29 46 42 - 69 0 0 30 30 10 0 29 53 17 101 -10 30 46 27 30 13 56 31 10 20 29 50 22 - 68 0 0 30 34 1 0 29 49 18 101 -10 30 50 18 30 17 47 31 14 12 29 54 13 - 67 0 0 30 38 3 0 29 45 19 102 -11 30 54 21 30 21 50 31 18 15 29 58 15 - 66 0 0 30 42 17 0 29 41 20 103 -12 30 58 34 30 26 3 31 22 29 30 2 28 - 65 0 0 30 46 41 0 29 37 21 103 -12 31 2 59 30 30 27 31 26 54 30 6 51 - 64 0 0 30 51 16 0 29 33 21 104 -13 31 7 34 30 35 1 31 31 29 30 11 26 - 63 0 0 30 56 1 0 29 28 22 104 -14 31 12 20 30 39 47 31 36 15 30 16 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82 0 0 49 49 2 0 14 27 8 260 14 50 5 19 49 32 49 50 29 12 49 9 16 83 0 0 49 51 6 0 14 26 7 261 14 50 7 23 49 34 54 50 31 15 49 11 21 84 0 0 49 53 1 0 14 25 7 262 15 50 9 17 49 36 49 50 33 9 49 13 16 85 0 0 49 54 47 0 14 24 6 263 16 50 11 3 49 38 35 50 34 55 49 15 3 86 0 0 49 56 24 0 14 23 5 263 16 50 12 40 49 40 12 50 36 31 49 16 40 87 0 0 49 57 52 0 14 22 5 264 17 50 14 8 49 41 41 50 37 59 49 18 9 88 0 0 49 59 11 0 14 21 4 265 18 50 15 26 49 43 0 50 39 17 49 19 28 89 0 0 50 0 21 0 14 21 3 266 18 50 16 36 49 44 10 50 40 26 .. .. .. 90 0 0 50 1 21 0 14 20 3 266 19 50 17 36 49 45 10 50 41 27 .. .. .. 91 0 0 50 2 13 0 14 20 2 267 19 50 18 28 49 46 2 50 42 18 .. .. .. 92 0 0 50 2 55 0 14 20 1 268 20 50 19 10 49 46 45 50 43 0 .. .. .. 93 0 0 50 3 29 0 14 20 1 269 21 50 19 43 49 47 18 50 43 32 .. .. .. 94 0 0 50 3 53 0 14 19 0 269 21 50 20 7 49 47 42 50 43 56 .. .. .. Data for the target star ------------------------ * name: TYC 5131-00253-1 * constellation : Aquila * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 19 22 40.1454 DE: -00 17 10.446 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .016, .020 ) * V mag [mag]: 8.9 * B mag [mag]: 9.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (482) Petrina approx. diameter [km]: 46 approx. diameter ["]: .036 distance from Earth [AU]: 1.74400 * orbital information: orbit source: Preston date of fit: 2007 Jul 04 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 685 number of rejected observations: 98 time covered by the observations: 1904 Oct 03 - 2007 Jul 03 1 sigma uncertainty ellipse (major, minor, PA): 0.028, 0.017, 87° remarks: * orbital elements for (482) Petrina : Mean anomaly = 16.77968254 deg Arg. of pericenter = 87.84759847 deg Long. of node = 179.49507029 deg Inclination = 14.46260232 deg Eccentricity = 0.10257200 Semimajor axis = 2.99752016 AU Perihelion dist = 2.69005851 AU Mag: H = 8.79, G = 0.15 Epoch of elements : MJD 54286.01500000 TDT (2007 Jul 05.015) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Jul 05 482 Petrina 0h 22.4m UT 8.9 19 22 40.145- 0 17 10.45TYC 5131-00253-1 9.1 12.8 46 4.6 1.744 -1.883 -5.01 2.437 -0.284 -184.49 22.84 0.3735 -.11131 .62957 -5.59873 -0.99161 -0.00065 -0.00211 2000 15.63733992007 629.00000 87.847598179.495070 14.4626020.102572002.997520162.690058518.845 0.15 RATE 1.8991572 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.032 0.026 87.7 1.730 0.027 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Jul 04, 18:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org