IOTA/IOTA-ES occultation update for (663) Gerlinde / UCAC2 37854691 event on 2007 Oct 03, 06:47 UT Visible from Canada, USA Summary ------- On 2007 Oct 03 UT, the 101 km diameter asteroid (663) Gerlinde will occult a 10.6 mag star in the constellation Taurus for observers along a path across Canada, USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.3 mag to 14.9 mag (the magnitude of the asteroid) for at most 8.5 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: 58 * date and approx. time of event: 2007 Oct 03, 06:38 - 2007 Oct 03, 06:56 UT * magnitude of target star: 10.6 * magnitude drop [mag]: 4.3 * estimated maximum duration [s]: 8.5 * Moon: 52 % sunlit, 14° distance * Sun: 101° distance * rough path description: Canada, USA The occultation path -------------------- * approximate projected width [km]: 102 * 1 sigma uncertainty interval [path widths]: +/- 1.06 * 1 sigma uncertainty interval [seconds]: +/- 8.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .053 +/- .052) * 1 sigma uncertainty ellipse (major, minor, PA): ( .053", .052", 92° ) * approx speed of asteroid's shadow [km/s]: 11.8903 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 37854691 by 663 Gerlinde on 2007 Oct 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 ... .. .. -30 0 0 .. .. .. .. .. .. ... .. .. ... .. .. 51 4 47 ... .. .. 52 42 9 -29 0 0 6 56 11 0 290 58 51 12 6 ... .. .. 48 12 29 ... .. .. 49 43 41 -28 0 0 6 56 10 3 291 57 48 21 13 51 9 15 45 35 2 ... .. .. Latitude Latitude Latitude Latitude 48 0 0 -27 22 14 6 56 9 5 292 56 -27 52 9 -26 52 18 -28 55 25 -25 48 40 47 0 0 -26 59 24 6 56 8 6 293 56 -27 29 26 -26 29 19 -28 33 0 -25 25 24 46 0 0 -26 35 49 6 56 7 7 293 55 -27 6 0 -26 5 36 -28 9 51 -25 1 23 45 0 0 -26 11 30 6 56 6 8 293 55 -26 41 49 -25 41 8 -27 45 58 -24 36 36 44 0 0 -25 46 25 6 56 5 9 294 54 -26 16 53 -25 15 54 -27 21 20 -24 11 4 43 0 0 -25 20 35 6 56 4 10 294 54 -25 51 12 -24 49 55 -26 55 58 -23 44 46 42 0 0 -24 53 58 6 56 2 11 295 53 -25 24 44 -24 23 10 -26 29 50 -23 17 41 41 0 0 -24 26 36 6 56 0 12 295 53 -24 57 31 -23 55 38 -26 2 56 -22 49 49 40 0 0 -23 58 26 6 55 58 13 296 52 -24 29 31 -23 27 19 -25 35 16 -22 21 9 39 0 0 -23 29 29 6 55 56 14 296 52 -24 0 44 -22 58 12 -25 6 49 -21 51 42 38 0 0 -22 59 45 6 55 53 15 296 51 -23 31 9 -22 28 17 -24 37 35 -21 21 26 37 0 0 -22 29 12 6 55 51 16 297 50 -23 0 47 -21 57 35 -24 7 34 -20 50 22 36 0 0 -21 57 51 6 55 48 17 297 50 -22 29 36 -21 26 4 -23 36 44 -20 18 29 35 0 0 -21 25 42 6 55 45 18 297 49 -21 57 37 -20 53 44 -23 5 7 -19 45 47 34 0 0 -20 52 43 6 55 42 19 298 48 -21 24 49 -20 20 35 -22 32 41 -19 12 15 33 0 0 -20 18 56 6 55 38 20 298 47 -20 51 12 -19 46 36 -21 59 26 -18 37 54 32 0 0 -19 44 19 6 55 35 21 298 47 -20 16 46 -19 11 49 -21 25 23 -18 2 43 31 0 0 -19 8 52 6 55 31 22 299 46 -19 41 30 -18 36 11 -20 50 30 -17 26 42 30 0 0 -18 32 36 6 55 26 23 299 45 -19 5 25 -17 59 44 -20 14 48 -16 49 52 29 0 0 -17 55 31 6 55 22 25 299 44 -18 28 30 -17 22 28 -19 38 17 -16 12 11 28 0 0 -17 17 35 6 55 17 26 300 43 -17 50 46 -16 44 21 -19 0 56 -15 33 41 27 0 0 -16 38 51 6 55 13 27 300 43 -17 12 13 -16 5 25 -18 22 46 -14 54 21 26 0 0 -15 59 16 6 55 7 28 300 42 -16 32 50 -15 25 39 -17 43 47 -14 14 11 25 0 0 -15 18 53 6 55 2 29 300 41 -15 52 37 -14 45 5 -17 3 58 -13 33 12 24 0 0 -14 37 41 6 54 56 30 301 40 -15 11 36 -14 3 41 -16 23 21 -12 51 24 23 0 0 -13 55 40 6 54 51 32 301 39 -14 29 47 -13 21 29 -15 41 55 -12 8 48 22 0 0 -13 12 51 6 54 44 33 301 38 -13 47 9 -12 38 29 -14 59 41 -11 25 23 21 0 0 -12 29 14 6 54 38 34 301 37 -13 3 44 -11 54 41 -14 16 39 -10 41 12 20 0 0 -11 44 51 6 54 31 35 301 36 -12 19 32 -11 10 7 -13 32 50 - 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56 0 0 42 36 6 6 42 2 53 122 -33 42 6 8 43 6 6 41 2 42 44 9 48 - 57 0 0 42 55 7 6 41 56 52 122 -34 42 25 18 43 24 59 41 22 9 44 28 23 - 58 0 0 43 13 29 6 41 50 51 121 -34 42 43 48 43 43 12 41 40 56 44 46 19 - 59 0 0 43 31 12 6 41 44 50 120 -34 43 1 39 44 0 48 41 59 4 45 3 38 - 60 0 0 43 48 17 6 41 38 50 119 -35 43 18 51 44 17 45 42 16 33 45 20 19 - 61 0 0 44 4 45 6 41 33 49 118 -35 43 35 26 44 34 5 42 33 23 45 36 23 - 62 0 0 44 20 35 6 41 27 48 117 -36 43 51 24 44 49 48 42 49 36 45 51 51 - 63 0 0 44 35 49 6 41 22 47 117 -36 44 6 45 45 4 55 43 5 12 46 6 43 - 64 0 0 44 50 27 6 41 17 46 116 -37 44 21 30 45 19 27 43 20 11 46 21 0 - 65 0 0 45 4 30 6 41 12 46 115 -37 44 35 39 45 33 23 43 34 33 46 34 43 - 66 0 0 45 17 57 6 41 6 45 114 -38 44 49 12 45 46 44 43 48 20 46 47 51 - 67 0 0 45 30 50 6 41 1 44 113 -38 45 2 11 45 59 31 44 1 32 47 0 25 - 68 0 0 45 43 9 6 40 57 43 112 -38 45 14 36 46 11 44 44 14 8 47 12 26 - 69 0 0 45 54 54 6 40 52 43 112 -39 45 26 26 46 23 24 44 26 10 47 23 54 - 70 0 0 46 6 6 6 40 47 42 111 -39 45 37 43 46 34 30 44 37 39 47 34 49 - 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86 0 0 47 54 22 6 39 44 31 98 -44 47 26 51 48 21 55 46 28 35 49 20 25 - 87 0 0 47 56 55 6 39 41 30 97 -44 47 29 25 48 24 27 46 31 11 49 22 54 - 88 0 0 47 59 0 6 39 38 29 97 -44 47 31 30 48 26 30 46 33 19 49 24 56 - 89 0 0 48 0 35 6 39 35 29 96 -44 47 33 7 48 28 5 46 34 57 49 26 29 - 90 0 0 48 1 43 6 39 32 28 95 -45 47 34 15 48 29 12 46 36 6 49 27 35 - 91 0 0 48 2 22 6 39 29 27 94 -45 47 34 54 48 29 51 46 36 45 49 28 13 - 92 0 0 48 2 32 6 39 26 27 94 -45 47 35 4 48 30 1 46 36 56 49 28 23 - 93 0 0 48 2 14 6 39 23 26 93 -45 47 34 46 48 29 43 46 36 37 49 28 6 - 94 0 0 48 1 28 6 39 20 25 92 -45 47 33 59 48 28 57 46 35 49 49 27 21 - 95 0 0 48 0 13 6 39 17 25 91 -45 47 32 44 48 27 43 46 34 33 49 26 8 - 96 0 0 47 58 30 6 39 15 24 90 -46 47 31 0 48 26 1 46 32 47 49 24 28 - 97 0 0 47 56 18 6 39 12 23 90 -46 47 28 47 48 23 50 46 30 32 49 22 20 - 98 0 0 47 53 38 6 39 10 23 89 -46 47 26 5 48 21 12 46 27 47 49 19 44 - 99 0 0 47 50 29 6 39 7 22 88 -46 47 22 55 48 18 5 46 24 34 49 16 40 -100 0 0 47 46 52 6 39 5 21 87 -46 47 19 16 48 14 29 46 20 51 49 13 8 -101 0 0 47 42 46 6 39 3 21 87 -46 47 15 8 48 10 25 46 16 39 49 9 9 -102 0 0 47 38 11 6 39 0 20 86 -46 47 10 31 48 5 53 46 11 57 49 4 41 -103 0 0 47 33 7 6 38 58 19 85 -46 47 5 25 48 0 51 46 6 45 48 59 45 -104 0 0 47 27 34 6 38 56 19 84 -46 46 59 49 47 55 21 46 1 4 48 54 21 -105 0 0 47 21 32 6 38 54 18 84 -47 46 53 44 47 49 22 45 54 53 48 48 28 -106 0 0 47 15 1 6 38 52 17 83 -47 46 47 9 47 42 53 45 48 11 48 42 6 -107 0 0 47 7 59 6 38 50 17 82 -47 46 40 5 47 35 56 45 41 0 48 35 15 -108 0 0 47 0 28 6 38 48 16 81 -47 46 32 30 47 28 28 45 33 17 48 27 56 -109 0 0 46 52 27 6 38 46 15 81 -47 46 24 25 47 20 31 45 25 4 48 20 7 -110 0 0 46 43 56 6 38 45 14 80 -47 46 15 50 47 12 4 45 16 21 48 11 48 -111 0 0 46 34 54 6 38 43 14 79 -47 46 6 44 47 3 6 45 7 6 48 2 59 -112 0 0 46 25 22 6 38 42 13 78 -47 45 57 7 46 53 38 44 57 19 47 53 41 -113 0 0 46 15 18 6 38 40 12 78 -47 45 46 59 46 43 39 44 47 1 47 43 52 -114 0 0 46 4 43 6 38 39 12 77 -47 45 36 19 46 33 9 44 36 11 47 33 32 -115 0 0 45 53 37 6 38 37 11 76 -47 45 25 7 46 22 8 44 24 49 47 22 42 -116 0 0 45 41 58 6 38 36 10 76 -47 45 13 24 46 10 35 44 12 54 47 11 20 -117 0 0 45 29 48 6 38 35 9 75 -46 45 1 7 45 58 30 44 0 26 46 59 27 -118 0 0 45 17 5 6 38 34 9 74 -46 44 48 19 45 45 52 43 47 25 46 47 2 -119 0 0 45 3 49 6 38 33 8 73 -46 44 34 57 45 32 42 43 33 51 46 34 5 -120 0 0 44 49 59 6 38 32 7 73 -46 44 21 1 45 18 59 43 19 43 46 20 35 -121 0 0 44 35 36 6 38 31 6 72 -46 44 6 32 45 4 43 43 5 0 46 6 32 -122 0 0 44 20 40 6 38 30 6 71 -46 43 51 29 44 49 52 42 49 43 45 51 55 -123 0 0 44 5 8 6 38 30 5 71 -46 43 35 51 44 34 28 42 33 51 45 36 45 -124 0 0 43 49 3 6 38 29 4 70 -46 43 19 38 44 18 29 42 17 24 45 21 1 -125 0 0 43 32 22 6 38 28 3 69 -46 43 2 50 44 1 55 42 0 21 45 4 42 -126 0 0 43 15 5 6 38 28 3 69 -45 42 45 26 43 44 46 41 42 42 44 47 49 -127 0 0 42 57 13 6 38 28 2 68 -45 42 27 26 43 27 1 41 24 26 44 30 20 -128 0 0 42 38 44 6 38 28 1 67 -45 42 8 50 43 8 40 41 5 34 44 12 15 -129 0 0 42 19 38 6 38 28 0 67 -45 .. .. .. 42 49 42 .. .. .. 43 53 34 Data for the target star ------------------------ * name: UCAC2 37854691 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 53 01.1326 DE: +17 18 34.479 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .050, .050 ) * V mag [mag]: 10.6 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (663) Gerlinde approx. diameter [km]: 101 approx. diameter ["]: .049 distance from Earth [AU]: 2.82700 * orbital information: orbit source: Preston date of fit: 2007 Sep 25 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 737 number of rejected observations: 71 time covered by the observations: 1908 Jun 24 - 2007 Sep 19 1 sigma uncertainty ellipse (major, minor, PA): 0.017, 0.013, 107° remarks: * orbital elements for (663) Gerlinde : Mean anomaly = 264.40017939 deg Arg. of pericenter = 310.53009472 deg Long. of node = 233.02967941 deg Inclination = 17.85030358 deg Eccentricity = 0.15316150 Semimajor axis = 3.06220611 AU Perihelion dist = 2.59319404 AU Mag: H = 9.08, G = 0.15 Epoch of elements : MJD 54376.28300000 TDT (2007 Oct 03.283) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Oct 03 663 Gerlinde 6h 47.3m UT 10.6 5 53 1.133 17 18 34.48UCAC2 37854691 0.0 14.9 101 8.5 2.827 1.156 -12.71 -25.176 17.313 75.48 -3.84 6.7887 .07568 .09760 5.32572 -4.08372 -0.00572 0.00005 2000 263.2445472007 927.00000310.530095233.029679 17.8503040.153161503.062206112.593194049.215 0.15 RATE 1.8392990 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.053 0.052 91.7 2.060 0.052 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Sep 25, 22:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org