IOTA/IOTA-ES occultation update for (485) Genua / TYC 0629-00522-1 event on 2009 Aug 02, 09:22 UT Visible from Summary ------- On 2009 Aug 02 UT, the 64 km diameter asteroid (485) Genua will occult a 10.2 mag star in the constellation Aries for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.2 mag to 13.4 mag (the magnitude of the asteroid) for at most 4.8 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: 85 * date and approx. time of event: 2009 Aug 02, 09:15 - 2009 Aug 02, 09:22 UT * magnitude of target star: 10.2 * magnitude drop [mag]: 3.2 * estimated maximum duration [s]: 4.8 * Moon: 88 % sunlit, 121° distance * Sun: 99° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 74 * 1 sigma uncertainty interval [path widths]: +/- 0.60 * 1 sigma uncertainty interval [seconds]: +/- 3.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .026 +/- .022) * 1 sigma uncertainty ellipse (major, minor, PA): ( .026", .022", 88° ) * approx speed of asteroid's shadow [km/s]: 13.3169 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0629-00522-1 by 485 Genua on 2009 Aug 2 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 -157 0 0 25 36 45 9 15 36 0 76 -43 25 16 4 25 57 31 24 51 20 26 22 31 -156 0 0 25 50 52 9 15 36 1 76 -43 25 30 10 26 11 38 25 5 26 26 36 40 -155 0 0 26 5 4 9 15 37 2 77 -43 25 44 21 26 25 51 25 19 36 26 50 53 -154 0 0 26 19 20 9 15 37 3 77 -43 25 58 37 26 40 7 25 33 51 27 5 10 -153 0 0 26 33 40 9 15 38 4 77 -43 26 12 57 26 54 28 25 48 10 27 19 32 -152 0 0 26 48 4 9 15 38 5 78 -43 26 27 20 27 8 53 26 2 33 27 33 57 -151 0 0 27 2 32 9 15 39 6 78 -43 26 41 48 27 23 21 26 17 0 27 48 26 -150 0 0 27 17 3 9 15 40 7 79 -44 26 56 18 27 37 52 26 31 30 28 2 58 -149 0 0 27 31 37 9 15 41 8 79 -44 27 10 51 27 52 27 26 46 3 28 17 32 -148 0 0 27 46 13 9 15 43 9 80 -44 27 25 27 28 7 3 27 0 38 28 32 10 -147 0 0 28 0 51 9 15 44 10 80 -43 27 40 5 28 21 42 27 15 16 28 46 49 -146 0 0 28 15 32 9 15 45 10 81 -43 27 54 45 28 36 23 27 29 55 29 1 30 -145 0 0 28 30 14 9 15 47 11 81 -43 28 9 27 28 51 5 27 44 37 29 16 13 -144 0 0 28 44 57 9 15 49 12 82 -43 28 24 10 29 5 48 27 59 19 29 30 56 -143 0 0 28 59 41 9 15 51 13 82 -43 28 38 54 29 20 33 28 14 3 29 45 41 -142 0 0 29 14 26 9 15 53 14 83 -43 28 53 38 29 35 18 28 28 47 30 0 26 -141 0 0 29 29 11 9 15 55 15 83 -43 29 8 23 29 50 3 28 43 32 30 15 11 -140 0 0 29 43 55 9 15 58 16 84 -43 29 23 8 30 4 48 28 58 16 30 29 57 -139 0 0 29 58 40 9 16 0 17 84 -42 29 37 52 30 19 32 29 13 0 30 44 41 -138 0 0 30 13 24 9 16 3 18 85 -42 29 52 36 30 34 16 29 27 44 30 59 25 -137 0 0 30 28 6 9 16 5 19 85 -42 30 7 18 30 48 59 29 42 27 31 14 8 -136 0 0 30 42 48 9 16 8 19 86 -42 30 22 0 31 3 40 29 57 8 31 28 49 -135 0 0 30 57 28 9 16 11 20 87 -41 30 36 40 31 18 20 30 11 48 31 43 29 -134 0 0 31 12 5 9 16 14 21 87 -41 30 51 17 31 32 58 30 26 26 31 58 6 -133 0 0 31 26 41 9 16 17 22 88 -41 31 5 53 31 47 33 30 41 1 32 12 42 -132 0 0 31 41 13 9 16 21 23 88 -40 31 20 26 32 2 6 30 55 34 32 27 14 -131 0 0 31 55 43 9 16 24 24 89 -40 31 34 56 32 16 35 31 10 5 32 41 44 -130 0 0 32 10 10 9 16 28 25 90 -40 31 49 23 32 31 2 31 24 32 32 56 10 -129 0 0 32 24 33 9 16 31 26 90 -39 32 3 46 32 45 24 31 38 55 33 10 32 -128 0 0 32 38 52 9 16 35 26 91 -39 32 18 5 32 59 43 31 53 15 33 24 51 -127 0 0 32 53 7 9 16 39 27 92 -39 32 32 21 33 13 58 32 7 31 33 39 5 -126 0 0 33 7 18 9 16 43 28 92 -38 32 46 32 33 28 9 32 21 42 33 53 15 -125 0 0 33 21 24 9 16 47 29 93 -38 33 0 38 33 42 14 32 35 49 34 7 20 -124 0 0 33 35 25 9 16 51 30 94 -37 33 14 40 33 56 15 32 49 51 34 21 20 -123 0 0 33 49 21 9 16 56 31 95 -37 33 28 36 34 10 10 33 3 48 34 35 15 -122 0 0 34 3 11 9 17 0 31 95 -36 33 42 26 34 24 0 33 17 39 34 49 4 -121 0 0 34 16 55 9 17 4 32 96 -36 33 56 11 34 37 44 33 31 24 35 2 48 -120 0 0 34 30 33 9 17 9 33 97 -35 34 9 50 34 51 21 33 45 4 35 16 25 -119 0 0 34 44 5 9 17 14 34 98 -35 34 23 23 35 4 53 33 58 37 35 29 55 -118 0 0 34 57 31 9 17 18 35 98 -34 34 36 49 35 18 17 34 12 4 35 43 19 -117 0 0 35 10 49 9 17 23 35 99 -34 34 50 8 35 31 35 34 25 23 35 56 36 -116 0 0 35 24 1 9 17 28 36 100 -33 35 3 20 35 44 46 34 38 36 36 9 46 -115 0 0 35 37 5 9 17 33 37 101 -33 35 16 24 35 57 49 34 51 42 36 22 49 -114 0 0 35 50 1 9 17 38 38 102 -32 35 29 22 36 10 45 35 4 40 36 35 44 -113 0 0 36 2 50 9 17 43 39 103 -31 35 42 11 36 23 33 35 17 30 36 48 31 -112 0 0 36 15 31 9 17 48 39 104 -31 35 54 53 36 36 13 35 30 12 37 1 10 -111 0 0 36 28 3 9 17 53 40 105 -30 36 7 26 36 48 45 35 42 47 37 13 41 -110 0 0 36 40 27 9 17 59 41 106 -30 36 19 51 37 1 8 35 55 12 37 26 3 -109 0 0 36 52 43 9 18 4 42 107 -29 36 32 7 37 13 23 36 7 30 37 38 17 -108 0 0 37 4 49 9 18 9 42 108 -29 36 44 14 37 25 29 36 19 38 37 50 22 -107 0 0 37 16 47 9 18 15 43 109 -28 36 56 13 37 37 25 36 31 37 38 2 17 -106 0 0 37 28 35 9 18 20 44 110 -27 37 8 2 37 49 13 36 43 28 38 14 4 -105 0 0 37 40 14 9 18 26 44 111 -27 37 19 42 38 0 51 36 55 8 38 25 41 -104 0 0 37 51 43 9 18 32 45 112 -26 37 31 12 38 12 19 37 6 40 38 37 8 -103 0 0 38 3 3 9 18 37 46 113 -25 37 42 32 38 23 38 37 18 1 38 48 26 -102 0 0 38 14 13 9 18 43 46 114 -25 37 53 43 38 34 47 37 29 13 38 59 33 -101 0 0 38 25 12 9 18 49 47 115 -24 38 4 44 38 45 45 37 40 15 39 10 31 -100 0 0 38 36 2 9 18 55 48 116 -23 38 15 34 38 56 34 37 51 6 39 21 18 - 99 0 0 38 46 41 9 19 1 48 118 -23 38 26 14 39 7 12 38 1 47 39 31 55 - 98 0 0 38 57 9 9 19 7 49 119 -22 38 36 43 39 17 39 38 12 18 39 42 21 - 97 0 0 39 7 27 9 19 12 50 120 -21 38 47 2 39 27 56 38 22 38 39 52 37 - 96 0 0 39 17 34 9 19 18 50 121 -21 38 57 10 39 38 2 38 32 47 40 2 42 - 95 0 0 39 27 30 9 19 24 51 123 -20 39 7 7 39 47 58 38 42 45 40 12 36 - 94 0 0 39 37 15 9 19 31 51 124 -19 39 16 53 39 57 42 38 52 32 40 22 19 - 93 0 0 39 46 49 9 19 37 52 126 -19 39 26 28 40 7 15 39 2 8 40 31 51 - 92 0 0 39 56 12 9 19 43 52 127 -18 39 35 52 40 16 37 39 11 33 40 41 11 - 91 0 0 40 5 23 9 19 49 53 128 -17 39 45 4 40 25 47 39 20 46 40 50 21 - 90 0 0 40 14 23 9 19 55 53 130 -17 39 54 5 40 34 46 39 29 48 40 59 18 - 89 0 0 40 23 12 9 20 1 54 131 -16 40 2 54 40 43 33 39 38 39 41 8 5 - 88 0 0 40 31 48 9 20 7 54 133 -15 40 11 32 40 52 9 39 47 17 41 16 39 - 87 0 0 40 40 13 9 20 14 55 134 -15 40 19 58 41 0 33 39 55 44 41 25 2 - 86 0 0 40 48 26 9 20 20 55 136 -14 40 28 12 41 8 45 40 3 59 41 33 13 - 85 0 0 40 56 27 9 20 26 56 138 -13 40 36 14 41 16 45 40 12 3 41 41 12 - 84 0 0 41 4 17 9 20 32 56 139 -13 40 44 4 41 24 33 40 19 54 41 48 59 - 83 0 0 41 11 54 9 20 39 57 141 -12 40 51 42 41 32 10 40 27 33 41 56 34 - 82 0 0 41 19 19 9 20 45 57 143 -11 40 59 8 41 39 34 40 35 0 42 3 57 - 81 0 0 41 26 31 9 20 51 57 145 -11 41 6 21 41 46 46 40 42 14 42 11 8 - 80 0 0 41 33 32 9 20 58 58 146 -10 41 13 23 41 53 45 40 49 17 42 18 7 - 79 0 0 41 40 20 9 21 4 58 148 -9 41 20 12 42 0 33 40 56 7 42 24 53 - 78 0 0 41 46 56 9 21 10 58 150 -8 41 26 48 42 7 8 41 2 44 42 31 27 - 77 0 0 41 53 19 9 21 17 59 152 -8 41 33 12 42 13 30 41 9 9 42 37 49 - 76 0 0 41 59 30 9 21 23 59 154 -7 41 39 24 42 19 40 41 15 22 42 43 58 - 75 0 0 42 5 29 9 21 29 59 156 -6 41 45 23 42 25 38 41 21 22 42 49 55 - 74 0 0 42 11 14 9 21 36 59 158 -6 41 51 10 42 31 23 41 27 10 42 55 39 - 73 0 0 42 16 48 9 21 42 59 160 -5 41 56 44 42 36 56 41 32 44 43 1 10 - 72 0 0 42 22 8 9 21 49 60 161 -4 42 2 5 42 42 15 41 38 7 43 6 29 - 71 0 0 42 27 16 9 21 55 60 163 -3 42 7 14 42 47 23 41 43 16 43 11 36 - 70 0 0 42 32 12 9 22 1 60 165 -3 42 12 10 42 52 17 41 48 13 43 16 30 - 69 0 0 42 36 54 9 22 8 60 167 -2 42 16 53 42 56 59 41 52 57 43 21 11 - 68 0 0 42 41 24 9 22 14 60 169 -1 42 21 23 43 1 28 41 57 28 43 25 39 - 67 0 0 42 45 41 9 22 20 60 172 -1 42 25 41 43 5 45 42 1 46 43 29 55 Uncertainty in time = +/- 3 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 0629-00522-1 * constellation : Aries * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 55 28.9810 DE: +12 58 45.782 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .020 ) * V mag [mag]: 10.2 * B mag [mag]: 10.7 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (485) Genua approx. diameter [km]: 64 approx. diameter ["]: .037 distance from Earth [AU]: 2.36200 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 771 number of rejected observations: 116 time covered by the observations: 1904 Oct 04 - 2007 Sep 21 1 sigma uncertainty ellipse (major, minor, PA): 0.016, 0.010, 85° remarks: * orbital elements for (485) Genua : Mean anomaly = 285.49695720 deg Arg. of pericenter = 272.52150889 deg Long. of node = 193.49312489 deg Inclination = 13.85700100 deg Eccentricity = 0.19099203 Semimajor axis = 2.74920824 AU Perihelion dist = 2.22413139 AU Mag: H = 8.11, G = 0.15 Epoch of elements : MJD 55045.39100000 TDT (2009 Aug 02.391) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Aug 2 485 Genua 9h 22.5m UT 10.2 1 55 28.981 12 58 45.78TYC 0629-00522-1 10.7 13.4 64 4.8 2.362 1.911 1.75 -62.8734 12.979 40.94 17.68 9.3757 -0.02977 0.49436 7.50167 0.47107 -0.00511 -0.00191 2000 284.3313242009 728.00000272.521509193.493125 13.8570010.19099203 2.7492082 2.2241314 8.3 5.00.15 RATE 2.1621840 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.026 0.022 88 1.60 0.022 0 54545.5020090802_0522-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 11:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org