IOTA/IOTA-ES occultation update for (654) Zelinda / UCAC2 34030931 event on 2007 Jul 03, 04:32 UT Visible from Brazil, Colombia Summary ------- On 2007 Jul 03 UT, the 127 km diameter asteroid (654) Zelinda will occult a 12.0 mag star in the constellation Pegasus for observers along a path across Brazil, Colombia. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.7 mag to 13.4 mag (the magnitude of the asteroid) for at most 13.8 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: 99 * date and approx. time of event: 2007 Jul 03, 04:24 - 2007 Jul 03, 04:40 UT * magnitude of target star: 12.0 * magnitude drop [mag]: 1.7 * estimated maximum duration [s]: 13.8 * Moon: 92 % sunlit, 31° distance * Sun: 122° distance * rough path description: Brazil, Colombia Additional comments ------------------- 28" double star. The occultation path -------------------- * approximate projected width [km]: 184 * 1 sigma uncertainty interval [path widths]: +/- 0.31 * 1 sigma uncertainty interval [seconds]: +/- 3.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .026 +/- .023) * 1 sigma uncertainty ellipse (major, minor, PA): ( .026", .023", 84° ) * approx speed of asteroid's shadow [km/s]: 9.2188 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 34030931 by 654 Zelinda 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 ' " Longitude Longitude Longitude Longitude - 83 28 19 -72 0 0 4 24 23 0 69 -40 - 77 13 12 ... .. .. ... .. .. ... .. .. - 76 56 36 -71 0 0 4 24 24 3 63 -41 - 72 16 26 - 82 43 41 ... .. .. ... .. .. - 72 22 14 -70 0 0 4 24 26 4 59 -43 - 68 30 4 - 76 48 29 - 66 18 2 - 80 0 19 - 68 49 51 -69 0 0 4 24 29 6 55 -44 - 65 28 4 - 72 33 0 - 63 31 5 - 75 6 11 - 65 57 38 -68 0 0 4 24 32 8 53 -45 - 62 57 20 - 69 12 50 - 61 11 29 - 71 23 33 - 63 34 7 -67 0 0 4 24 35 9 50 -46 - 60 50 2 - 66 29 19 - 59 12 54 - 68 24 51 - 61 32 23 -66 0 0 4 24 39 10 49 -47 - 59 1 7 - 64 12 19 - 57 31 0 - 65 56 44 - 59 47 50 -65 0 0 4 24 43 11 47 -48 - 57 27 0 - 62 15 39 - 56 2 42 - 63 51 27 - 58 17 14 -64 0 0 4 24 47 13 46 -49 - 56 5 7 - 60 35 8 - 54 45 44 - 62 4 1 - 56 58 12 -63 0 0 4 24 52 14 45 -50 - 54 53 30 - 59 7 49 - 53 38 21 - 60 30 59 - 55 48 58 -62 0 0 4 24 57 15 44 -50 - 53 50 39 - 57 51 30 - 52 39 11 - 59 9 52 - 54 48 6 -61 0 0 4 25 2 16 43 -51 - 52 55 22 - 56 44 31 - 51 47 8 - 57 58 46 - 53 54 29 -60 0 0 4 25 7 17 42 -52 - 52 6 41 - 55 45 33 - 51 1 18 - 56 56 13 - 53 7 13 -59 0 0 4 25 13 18 41 -53 - 51 23 47 - 54 53 33 - 50 20 58 - 56 1 5 - 52 25 33 -58 0 0 4 25 19 19 41 -54 - 50 46 2 - 54 7 41 - 49 45 32 - 55 12 27 - 51 48 52 -57 0 0 4 25 25 20 41 -55 - 50 12 53 - 53 27 14 - 49 14 27 - 54 29 31 - 51 16 39 -56 0 0 4 25 31 21 40 -55 - 49 43 51 - 52 51 36 - 48 47 19 - 53 51 40 - 50 48 27 -55 0 0 4 25 38 22 40 -56 - 49 18 34 - 52 20 20 - 48 23 45 - 53 18 23 - 50 23 54 -54 0 0 4 25 45 23 40 -57 - 48 56 40 - 51 52 58 - 48 3 26 - 52 49 12 - 50 2 40 -53 0 0 4 25 52 24 40 -58 - 48 37 52 - 51 29 11 - 47 46 5 - 52 23 45 - 49 44 28 -52 0 0 4 25 59 25 40 -59 - 48 21 55 - 51 8 38 - 47 31 28 - 52 1 42 - 49 29 5 -51 0 0 4 26 7 25 40 -59 - 48 8 34 - 50 51 5 - 47 19 22 - 51 42 45 - 49 16 16 -50 0 0 4 26 14 26 40 -60 - 47 57 40 - 50 36 17 - 47 9 36 - 51 26 41 - 49 5 51 -49 0 0 4 26 22 27 40 -61 - 47 49 0 - 50 24 3 - 47 2 0 - 51 13 15 - 48 57 40 -48 0 0 4 26 30 28 40 -62 - 47 42 27 - 50 14 10 - 46 56 26 - 51 2 17 - 48 51 34 -47 0 0 4 26 39 29 40 -62 - 47 37 53 - 50 6 30 - 46 52 45 - 50 53 36 - 48 47 26 -46 0 0 4 26 47 30 40 -63 - 47 35 9 - 50 0 54 - 46 50 53 - 50 47 5 - 48 45 8 -45 0 0 4 26 56 30 41 -64 - 47 34 9 - 49 57 15 - 46 50 41 - 50 42 34 - 48 44 35 -44 0 0 4 27 5 31 41 -65 - 47 34 49 - 49 55 26 - 46 52 5 - 50 39 57 - 48 45 41 -43 0 0 4 27 14 32 42 -65 - 47 37 3 - 49 55 22 - 46 55 0 - 50 39 8 - 48 48 21 -42 0 0 4 27 24 33 42 -66 - 47 40 46 - 49 56 57 - 46 59 21 - 50 40 2 - 48 52 31 -41 0 0 4 27 33 33 42 -67 - 47 45 55 - 50 0 7 - 47 5 6 - 50 42 33 - 48 58 8 -40 0 0 4 27 43 34 43 -68 - 47 52 26 - 50 4 47 - 47 12 10 - 50 46 37 - 49 5 6 -39 0 0 4 27 53 35 43 -68 - 48 0 16 - 50 10 53 - 47 20 30 - 50 52 11 - 49 13 25 -38 0 0 4 28 3 36 44 -69 - 48 9 22 - 50 18 24 - 47 30 5 - 50 59 10 - 49 23 0 -37 0 0 4 28 13 36 45 -70 - 48 19 41 - 50 27 14 - 47 40 51 - 51 7 33 - 49 33 51 -36 0 0 4 28 24 37 45 -71 - 48 31 11 - 50 37 23 - 47 52 46 - 51 17 15 - 49 45 53 -35 0 0 4 28 34 37 46 -71 - 48 43 51 - 50 48 48 - 48 5 49 - 51 28 16 - 49 59 7 -34 0 0 4 28 45 38 47 -72 - 48 57 39 - 51 1 26 - 48 19 58 - 51 40 32 - 50 13 29 -33 0 0 4 28 56 39 48 -73 - 49 12 33 - 51 15 17 - 48 35 11 - 51 54 3 - 50 29 0 -32 0 0 4 29 7 39 48 -73 - 49 28 33 - 51 30 18 - 48 51 28 - 52 8 46 - 50 45 37 -31 0 0 4 29 18 40 49 -74 - 49 45 36 - 51 46 29 - 49 8 47 - 52 24 40 - 51 3 21 -30 0 0 4 29 30 40 50 -75 - 50 3 43 - 52 3 49 - 49 27 8 - 52 41 45 - 51 22 9 -29 0 0 4 29 41 41 51 -75 - 50 22 52 - 52 22 16 - 49 46 31 - 52 59 59 - 51 42 3 -28 0 0 4 29 53 41 52 -76 - 50 43 4 - 52 41 51 - 50 6 54 - 53 19 23 - 52 3 0 -27 0 0 4 30 5 41 53 -76 - 51 4 18 - 53 2 33 - 50 28 17 - 53 39 55 - 52 25 2 -26 0 0 4 30 17 42 54 -77 - 51 26 33 - 53 24 22 - 50 50 42 - 54 1 36 - 52 48 9 -25 0 0 4 30 29 42 55 -77 - 51 49 51 - 53 47 18 - 51 14 6 - 54 24 25 - 53 12 20 -24 0 0 4 30 42 42 56 -77 - 52 14 11 - 54 11 21 - 51 38 32 - 54 48 23 - 53 37 37 -23 0 0 4 30 54 43 57 -78 - 52 39 34 - 54 36 32 - 52 3 59 - 55 13 30 - 54 3 59 -22 0 0 4 31 7 43 58 -78 - 53 6 0 - 55 2 50 - 52 30 28 - 55 39 47 - 54 31 28 -21 0 0 4 31 19 43 59 -78 - 53 33 31 - 55 30 18 - 52 58 0 - 56 7 15 - 55 0 5 -20 0 0 4 31 32 43 60 -78 - 54 2 6 - 55 58 57 - 53 26 35 - 56 35 55 - 55 29 50 -19 0 0 4 31 45 43 62 -78 - 54 31 48 - 56 28 47 - 53 56 15 - 57 5 48 - 56 0 45 -18 0 0 4 31 58 43 63 -78 - 55 2 37 - 56 59 49 - 54 27 1 - 57 36 56 - 56 32 53 -17 0 0 4 32 12 43 64 -78 - 55 34 36 - 57 32 7 - 54 58 55 - 58 9 21 - 57 6 14 -16 0 0 4 32 25 43 65 -78 - 56 7 46 - 58 5 41 - 55 31 58 - 58 43 4 - 57 40 52 -15 0 0 4 32 38 43 66 -78 - 56 42 9 - 58 40 35 - 56 6 13 - 59 18 8 - 58 16 48 -14 0 0 4 32 52 43 67 -78 - 57 17 47 - 59 16 50 - 56 41 41 - 59 54 37 - 58 54 5 -13 0 0 4 33 6 43 69 -77 - 57 54 44 - 59 54 30 - 57 18 26 - 60 32 32 - 59 32 47 -12 0 0 4 33 19 43 70 -77 - 58 33 1 - 60 33 38 - 57 56 29 - 61 11 58 - 60 12 57 -11 0 0 4 33 33 43 71 -76 - 59 12 43 - 61 14 18 - 58 35 55 - 61 52 58 - 60 54 38 -10 0 0 4 33 47 43 72 -76 - 59 53 53 - 61 56 35 - 59 16 47 - 62 35 37 - 61 37 56 - 9 0 0 4 34 1 42 73 -75 - 60 36 35 - 62 40 32 - 59 59 8 - 63 20 0 - 62 22 56 - 8 0 0 4 34 15 42 74 -74 - 61 20 54 - 63 26 16 - 60 43 3 - 64 6 14 - 63 9 42 - 7 0 0 4 34 30 41 76 -73 - 62 6 55 - 64 13 52 - 61 28 38 - 64 54 23 - 63 58 22 - 6 0 0 4 34 44 41 77 -73 - 62 54 44 - 65 3 28 - 62 15 57 - 65 44 36 - 64 49 3 - 5 0 0 4 34 58 40 78 -72 - 63 44 27 - 65 55 11 - 63 5 7 - 66 37 1 - 65 41 53 - 4 0 0 4 35 13 40 79 -71 - 64 36 12 - 66 49 11 - 63 56 15 - 67 31 48 - 66 37 1 - 3 0 0 4 35 28 39 80 -70 - 65 30 8 - 67 45 38 - 64 49 30 - 68 29 8 - 67 34 38 - 2 0 0 4 35 42 38 81 -69 - 66 26 25 - 68 44 44 - 65 45 0 - 69 29 14 - 68 34 57 - 1 0 0 4 35 57 38 82 -68 - 67 25 13 - 69 46 44 - 66 42 56 - 70 32 22 - 69 38 13 0 0 0 4 36 12 37 82 -67 - 68 26 46 - 70 51 54 - 67 43 30 - 71 38 50 - 70 44 43 1 0 0 4 36 27 36 83 -66 - 69 31 19 - 72 0 34 - 68 46 56 - 72 48 59 Latitude Latitude Latitude Latitude - 72 0 0 2 4 20 4 36 43 35 84 -65 3 7 34 0 59 31 3 46 2 0 18 28 - 73 0 0 2 53 0 4 36 55 34 85 -64 3 55 6 1 49 23 4 32 55 1 9 8 - 74 0 0 3 39 27 4 37 7 33 85 -63 4 40 31 2 36 57 5 17 43 1 57 26 - 75 0 0 4 23 47 4 37 19 32 86 -62 5 23 53 3 22 19 6 0 30 2 43 29 - 76 0 0 5 6 4 4 37 29 31 86 -61 6 5 16 4 5 34 6 41 21 3 27 22 - 77 0 0 5 46 22 4 37 40 30 86 -60 6 44 44 4 46 47 7 20 20 4 9 10 - 78 0 0 6 24 47 4 37 50 29 87 -59 7 22 21 5 26 1 7 57 29 4 48 57 - 79 0 0 7 1 20 4 37 59 29 87 -58 7 58 10 6 3 22 8 32 52 5 26 48 - 80 0 0 7 36 6 4 38 9 28 87 -57 8 32 15 6 38 51 9 6 33 6 2 46 - 81 0 0 8 9 8 4 38 17 27 87 -57 9 4 38 7 12 34 9 38 33 6 36 55 - 82 0 0 8 40 28 4 38 26 26 87 -56 9 35 23 7 44 32 10 8 56 7 9 18 - 83 0 0 9 10 10 4 38 34 25 87 -55 10 4 31 8 14 49 10 37 45 7 39 58 - 84 0 0 9 38 15 4 38 42 24 88 -54 10 32 5 8 43 27 11 5 0 8 8 57 - 85 0 0 10 4 47 4 38 49 23 88 -53 10 58 8 9 10 29 11 30 46 8 36 19 - 86 0 0 10 29 46 4 38 56 22 88 -53 11 22 40 9 35 57 11 55 2 9 2 5 - 87 0 0 10 53 16 4 39 2 21 88 -52 11 45 45 9 59 53 12 17 52 9 26 18 - 88 0 0 11 15 18 4 39 9 20 88 -51 12 7 24 10 22 18 12 39 17 9 48 59 - 89 0 0 11 35 53 4 39 15 19 88 -50 12 27 38 10 43 16 12 59 18 10 10 11 - 90 0 0 11 55 3 4 39 20 18 87 -49 12 46 29 11 2 47 13 17 57 10 29 55 - 91 0 0 12 12 50 4 39 26 17 87 -49 13 3 57 11 20 52 13 35 16 10 48 13 - 92 0 0 12 29 14 4 39 31 16 87 -48 13 20 6 11 37 33 13 51 14 11 5 5 - 93 0 0 12 44 17 4 39 36 15 87 -47 13 34 54 11 52 52 14 5 54 11 20 33 - 94 0 0 12 58 0 4 39 40 14 87 -47 13 48 24 12 6 48 14 19 16 11 34 39 - 95 0 0 13 10 24 4 39 44 14 87 -46 14 0 36 12 19 24 14 31 21 11 47 22 - 96 0 0 13 21 29 4 39 48 13 87 -45 14 11 32 12 30 40 14 42 11 11 58 45 - 97 0 0 13 31 17 4 39 52 12 86 -44 14 21 10 12 40 36 14 51 44 12 8 47 - 98 0 0 13 39 47 4 39 55 11 86 -44 14 29 33 12 49 14 15 0 3 12 17 29 - 99 0 0 13 47 0 4 39 58 10 86 -43 14 36 41 12 56 33 15 7 7 12 24 52 -100 0 0 13 52 56 4 40 1 9 86 -42 14 42 33 13 2 34 15 12 56 12 30 56 -101 0 0 13 57 37 4 40 3 8 86 -42 14 47 10 13 7 18 15 17 32 12 35 41 -102 0 0 14 1 1 4 40 5 7 85 -41 14 50 33 13 10 43 15 20 54 12 39 8 -103 0 0 14 3 9 4 40 7 6 85 -40 14 52 41 13 12 52 .. .. .. 12 41 16 -104 0 0 14 4 1 4 40 9 5 85 -40 14 53 34 13 13 42 .. .. .. 12 42 6 -105 0 0 14 3 36 4 40 10 4 85 -39 14 53 12 13 13 15 .. .. .. 12 41 37 -106 0 0 14 1 55 4 40 11 3 84 -38 .. .. .. 13 11 29 .. .. .. 12 39 48 -107 0 0 13 58 57 4 40 12 2 84 -38 .. .. .. 13 8 25 .. .. .. 12 36 40 -108 0 0 13 54 40 4 40 12 1 84 -37 .. .. .. 13 4 1 .. .. .. 12 32 12 -109 0 0 13 49 6 4 40 13 0 84 -36 .. .. .. 12 58 18 .. .. .. .. .. .. Data for the target star ------------------------ * name: UCAC2 34030931 * constellation : Pegasus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 22 12 33.2711 DE: +06 01 59.552 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .024, .021 ) * V mag [mag]: 12.0 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (654) Zelinda approx. diameter [km]: 127 approx. diameter ["]: .082 distance from Earth [AU]: 2.14700 * orbital information: orbit source: Preston date of fit: 2007 Jun 28 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 809 number of rejected observations: 68 time covered by the observations: 1908 Jan 04 - 2007 Jun 28 1 sigma uncertainty ellipse (major, minor, PA): 0.011, 0.010, 56° remarks: * orbital elements for (654) Zelinda : Mean anomaly = 192.91578996 deg Arg. of pericenter = 214.01345912 deg Long. of node = 278.57144289 deg Inclination = 18.12857198 deg Eccentricity = 0.23226724 Semimajor axis = 2.29602919 AU Perihelion dist = 1.76273683 AU Mag: H = 8.51, G = 0.15 Epoch of elements : MJD 54284.18900000 TDT (2007 Jul 03.189) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Jul 03 654 Zelinda 4h 32.3m UT 12.0 22 12 33.271 6 1 59.55UCAC2 34030931 0.0 13.4 127 13.8 2.147 -0.710 18.51 -15.758 6.028 -247.04 22.99 4.5379 -.62988 -.35926 -2.57868 4.51946 -0.00399 -0.00248 2000 191.7290692007 629.00000214.013459278.571443 18.1285720.232267242.296029191.762736838.525 0.15 RATE 2.8329440 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.026 0.023 84.1 1.310 0.025 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Jun 29, 02:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org