IOTA/IOTA-ES occultation update for (64) Angelina / TYC 6859-01103-1 event on 2007 Aug 02, 14:30 UT Visible from Papua New Guinea Summary ------- On 2007 Aug 02 UT, the 53 km diameter asteroid (64) Angelina will occult a 12.1 mag star in the constellation Sagittarius for observers along a path across Papua New Guinea. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.7 mag to 12.0 mag (the magnitude of the asteroid) for at most 5.7 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: 75 * date and approx. time of event: 2007 Aug 02, 14:19 - 2007 Aug 02, 14:41 UT * magnitude of target star: 12.1 * magnitude drop [mag]: 0.7 * estimated maximum duration [s]: 5.7 * Moon: 85 % sunlit, 75° distance * Sun: 150° distance * rough path description: Papua New Guinea The occultation path -------------------- * approximate projected width [km]: 54 * 1 sigma uncertainty interval [path widths]: +/- 0.76 * 1 sigma uncertainty interval [seconds]: +/- 4.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .028 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .028", .027", 88° ) * approx speed of asteroid's shadow [km/s]: 9.3498 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6859-01103-1 by 64 Angelina on 2007 Aug 02 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 24 0 0 8 58 30 14 41 39 0 114 28 .. .. .. 8 42 24 .. .. .. .. .. .. 25 0 0 8 32 0 14 41 38 1 114 27 8 48 7 8 15 55 9 12 37 7 51 30 26 0 0 8 5 35 14 41 38 2 114 26 8 21 41 7 49 30 8 46 11 7 25 6 27 0 0 7 39 15 14 41 38 3 114 25 7 55 20 7 23 11 8 19 49 6 58 48 28 0 0 7 13 2 14 41 37 4 115 24 7 29 6 6 56 59 7 53 33 6 32 37 29 0 0 6 46 55 14 41 36 5 115 23 7 2 58 6 30 53 7 27 24 6 6 32 30 0 0 6 20 55 14 41 34 6 115 22 6 36 58 6 4 54 7 1 23 5 40 35 31 0 0 5 55 4 14 41 33 8 115 21 6 11 5 5 39 3 6 35 29 5 14 46 32 0 0 5 29 21 14 41 31 9 115 20 5 45 21 5 13 22 6 9 43 4 49 5 33 0 0 5 3 47 14 41 29 10 115 19 5 19 47 4 47 49 5 44 7 4 23 34 34 0 0 4 38 24 14 41 26 11 115 18 4 54 22 4 22 26 5 18 40 3 58 13 35 0 0 4 13 10 14 41 24 12 115 17 4 29 7 3 57 14 4 53 24 3 33 2 36 0 0 3 48 7 14 41 21 13 115 16 4 4 3 3 32 12 4 28 19 3 8 3 37 0 0 3 23 16 14 41 18 14 115 15 3 39 11 3 7 23 4 3 25 2 43 15 38 0 0 2 58 37 14 41 15 15 115 14 3 14 31 2 42 45 3 38 42 2 18 39 39 0 0 2 34 11 14 41 11 16 116 12 2 50 3 2 18 20 3 14 13 1 54 15 40 0 0 2 9 57 14 41 8 17 116 11 2 25 48 1 54 7 2 49 56 1 30 5 41 0 0 1 45 57 14 41 4 18 116 10 2 1 47 1 30 9 2 25 53 1 6 9 42 0 0 1 22 11 14 41 0 19 116 9 1 38 0 1 6 24 2 2 3 0 42 26 43 0 0 0 58 40 14 40 55 20 116 8 1 14 27 0 42 54 1 38 28 0 18 58 44 0 0 0 35 23 14 40 51 21 116 7 0 51 9 0 19 39 1 15 8 - 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2007 Jul 04 1 sigma uncertainty ellipse (major, minor, PA): 0.014, 0.012, 84° remarks: * orbital elements for (64) Angelina : Mean anomaly = 155.90391115 deg Arg. of pericenter = 179.62650281 deg Long. of node = 309.21609289 deg Inclination = 1.30931592 deg Eccentricity = 0.12480043 Semimajor axis = 2.68280937 AU Perihelion dist = 2.34799362 AU Mag: H = 7.78, G = 0.48 Epoch of elements : MJD 54314.60400000 TDT (2007 Aug 02.604) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Aug 02 64 Angelina 14h 30.5m UT 12.1 18 44 37.099-23 40 25.20TYC 6859-01103-1 12.6 12.0 53 5.7 2.070 -1.630 -0.56 112.723 -23.673 -36.05 17.76 14.5083 -.00559 .19400 -5.27560 -0.13334 0.00273 0.00026 2000 154.8712572007 729.00000179.626503309.216093 1.3093160.124800432.682809372.347993627.675 0.48 RATE 2.2429490 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.028 0.027 88.5 1.760 0.027 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Jul 29, 02:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org