IOTA/IOTA-ES occultation update for (4967) Glia / TYC 6408-00119-1 event on 2008 Aug 21, 04:41 UT Visible from Caribbean, Venezuela, Colombia Summary ------- On 2008 Aug 21 UT, the 39 km diameter asteroid (4967) Glia will occult a 10.9 mag star in the constellation Aquarius for observers along a path across Caribbean, Venezuela, Colombia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.4 mag to 15.3 mag (the magnitude of the asteroid) for at most 3.2 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: 20 * date and approx. time of event: 2008 Aug 21, 04:34 - 2008 Aug 21, 04:48 UT * magnitude of target star: 10.9 * magnitude drop [mag]: 4.4 * estimated maximum duration [s]: 3.2 * Moon: 80 % sunlit, 36° distance * Sun: 152° distance * rough path description: Caribbean, Venezuela, Colombia The occultation path -------------------- * approximate projected width [km]: 51 * 1 sigma uncertainty interval [path widths]: +/- 3.32 * 1 sigma uncertainty interval [seconds]: +/- 11.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .107 +/- .063) * 1 sigma uncertainty ellipse (major, minor, PA): ( .109", .060", 78° ) * approx speed of asteroid's shadow [km/s]: 12.0367 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6408-00119-1 by 4967 Glia on 2008 Aug 21 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 - 59 4 42 71 0 0 4 34 50 0 162 -7 - 59 49 10 - 58 20 35 ... .. .. ... .. .. - 58 8 42 70 0 0 4 34 50 1 162 -8 - 58 50 37 - 57 27 4 - 63 37 16 ... .. .. - 57 20 50 69 0 0 4 34 51 2 163 -9 - 58 0 32 - 56 41 23 - 62 31 18 ... .. .. - 56 39 53 68 0 0 4 34 51 3 164 -10 - 57 17 38 - 56 2 22 - 61 34 27 ... .. .. - 56 4 54 67 0 0 4 34 52 5 164 -11 - 56 40 53 - 55 29 6 - 60 45 23 ... .. .. - 55 35 4 66 0 0 4 34 53 6 165 -12 - 56 9 29 - 55 0 49 - 60 3 0 ... .. .. - 55 9 45 65 0 0 4 34 54 7 165 -13 - 55 42 46 - 54 36 54 - 59 26 25 ... .. .. - 54 48 25 64 0 0 4 34 56 8 165 -13 - 55 20 9 - 54 16 50 - 58 54 54 - 50 50 23 - 54 30 37 63 0 0 4 34 57 9 166 -14 - 55 1 12 - 54 0 11 - 58 27 52 - 50 41 7 - 54 15 58 62 0 0 4 34 59 10 166 -15 - 54 45 29 - 53 46 35 - 58 4 48 - 50 34 16 - 54 4 9 61 0 0 4 35 1 11 166 -16 - 54 32 41 - 53 35 44 - 57 45 17 - 50 29 37 - 53 54 54 60 0 0 4 35 4 12 166 -17 - 54 22 32 - 53 27 21 - 57 28 57 - 50 26 58 - 53 47 57 59 0 0 4 35 6 13 166 -18 - 54 14 46 - 53 21 14 - 57 15 30 - 50 26 8 - 53 43 7 58 0 0 4 35 9 14 166 -19 - 54 9 10 - 53 17 10 - 57 4 40 - 50 26 58 - 53 40 14 57 0 0 4 35 12 14 166 -20 - 54 5 35 - 53 14 59 - 56 56 14 - 50 29 20 - 53 39 8 56 0 0 4 35 15 15 166 -21 - 54 3 49 - 53 14 32 - 56 49 58 - 50 33 7 - 53 39 41 55 0 0 4 35 18 16 166 -22 - 54 3 45 - 53 15 41 - 56 45 44 - 50 38 13 - 53 41 45 54 0 0 4 35 22 17 166 -23 - 54 5 15 - 53 18 19 - 56 43 21 - 50 44 32 - 53 45 15 53 0 0 4 35 25 18 166 -24 - 54 8 14 - 53 22 21 - 56 42 42 - 50 52 0 - 53 50 6 52 0 0 4 35 29 19 166 -25 - 54 12 34 - 53 27 41 - 56 43 40 - 51 0 33 - 53 56 11 51 0 0 4 35 33 20 166 -26 - 54 18 12 - 53 34 15 - 56 46 8 - 51 10 6 - 54 3 28 50 0 0 4 35 37 21 166 -27 - 54 25 2 - 53 41 57 - 56 50 1 - 51 20 38 - 54 11 51 49 0 0 4 35 42 22 165 -28 - 54 33 1 - 53 50 45 - 56 55 14 - 51 32 5 - 54 21 19 48 0 0 4 35 46 23 165 -29 - 54 42 6 - 54 0 35 - 57 1 44 - 51 44 24 - 54 31 47 47 0 0 4 35 51 24 165 -30 - 54 52 12 - 54 11 25 - 57 9 25 - 51 57 33 - 54 43 13 46 0 0 4 35 56 25 164 -31 - 55 3 18 - 54 23 11 - 57 18 14 - 52 11 31 - 54 55 35 45 0 0 4 36 1 26 164 -32 - 55 15 21 - 54 35 52 - 57 28 9 - 52 26 15 - 55 8 50 44 0 0 4 36 7 27 164 -33 - 55 28 19 - 54 49 25 - 57 39 7 - 52 41 44 - 55 22 58 43 0 0 4 36 12 28 163 -34 - 55 42 10 - 55 3 49 - 57 51 5 - 52 57 57 - 55 37 55 42 0 0 4 36 18 29 163 -35 - 55 56 52 - 55 19 2 - 58 4 1 - 53 14 52 - 55 53 42 41 0 0 4 36 24 30 163 -36 - 56 12 23 - 55 35 3 - 58 17 54 - 53 32 29 - 56 10 15 40 0 0 4 36 30 30 162 -37 - 56 28 44 - 55 51 50 - 58 32 42 - 53 50 46 - 56 27 36 39 0 0 4 36 36 31 162 -38 - 56 45 51 - 56 9 24 - 58 48 23 - 54 9 44 - 56 45 42 38 0 0 4 36 43 32 161 -39 - 57 3 45 - 56 27 42 - 59 4 56 - 54 29 21 - 57 4 33 37 0 0 4 36 49 33 161 -40 - 57 22 25 - 56 46 44 - 59 22 21 - 54 49 36 - 57 24 8 36 0 0 4 36 56 34 160 -41 - 57 41 49 - 57 6 29 - 59 40 35 - 55 10 30 - 57 44 26 35 0 0 4 37 3 35 160 -42 - 58 1 58 - 57 26 57 - 59 59 39 - 55 32 3 - 58 5 28 34 0 0 4 37 10 36 159 -43 - 58 22 51 - 57 48 9 - 60 19 32 - 55 54 13 - 58 27 14 33 0 0 4 37 17 37 158 -44 - 58 44 28 - 58 10 2 - 60 40 14 - 56 17 2 - 58 49 42 32 0 0 4 37 25 37 158 -45 - 59 6 49 - 58 32 38 - 61 1 44 - 56 40 28 - 59 12 53 31 0 0 4 37 32 38 157 -46 - 59 29 53 - 58 55 56 - 61 24 1 - 57 4 33 - 59 36 47 30 0 0 4 37 40 39 156 -47 - 59 53 41 - 59 19 57 - 61 47 7 - 57 29 16 - 60 1 25 29 0 0 4 37 48 40 155 -48 - 60 18 13 - 59 44 40 - 62 11 1 - 57 54 38 - 60 26 46 28 0 0 4 37 56 40 155 -49 - 60 43 28 - 60 10 6 - 62 35 43 - 58 20 38 - 60 52 51 27 0 0 4 38 4 41 154 -50 - 61 9 29 - 60 36 16 - 63 1 13 - 58 47 19 - 61 19 40 26 0 0 4 38 13 42 153 -51 - 61 36 14 - 61 3 9 - 63 27 33 - 59 14 39 - 61 47 14 25 0 0 4 38 21 43 152 -52 - 62 3 45 - 61 30 46 - 63 54 42 - 59 42 39 - 62 15 34 24 0 0 4 38 30 43 151 -54 - 62 32 2 - 61 59 9 - 64 22 41 - 60 11 22 - 62 44 40 23 0 0 4 38 39 44 150 -55 - 63 1 6 - 62 28 17 - 64 51 32 - 60 40 46 - 63 14 34 22 0 0 4 38 48 45 149 -56 - 63 30 58 - 62 58 13 - 65 21 14 - 61 10 53 - 63 45 16 21 0 0 4 38 57 45 148 -57 - 64 1 39 - 63 28 56 - 65 51 49 - 61 41 45 - 64 16 47 20 0 0 4 39 7 46 147 -58 - 64 33 10 - 64 0 28 - 66 23 19 - 62 13 21 - 64 49 9 19 0 0 4 39 16 46 146 -59 - 65 5 32 - 64 32 50 - 66 55 44 - 62 45 44 - 65 22 24 18 0 0 4 39 26 47 145 -60 - 65 38 47 - 65 6 4 - 67 29 6 - 63 18 55 - 65 56 32 17 0 0 4 39 36 47 143 -61 - 66 12 57 - 65 40 11 - 68 3 27 - 63 52 55 - 66 31 36 16 0 0 4 39 46 48 142 -62 - 66 48 3 - 66 15 12 - 68 38 48 - 64 27 46 - 67 7 37 15 0 0 4 39 56 48 141 -63 - 67 24 7 - 66 51 11 - 69 15 12 - 65 3 29 - 67 44 37 14 0 0 4 40 6 49 139 -64 - 68 1 10 - 67 28 8 - 69 52 41 - 65 40 7 - 68 22 39 13 0 0 4 40 16 49 138 -65 - 68 39 17 - 68 6 6 - 70 31 17 - 66 17 41 - 69 1 46 12 0 0 4 40 27 50 137 -66 - 69 18 27 - 68 45 7 - 71 11 4 - 66 56 13 - 69 41 58 11 0 0 4 40 37 50 135 -67 - 69 58 46 - 69 25 15 - 71 52 3 - 67 35 47 - 70 23 21 10 0 0 4 40 48 50 134 -68 - 70 40 15 - 70 6 31 - 72 34 19 - 68 16 25 - 71 5 56 9 0 0 4 40 59 50 132 -69 - 71 22 58 - 70 48 59 - 73 17 55 - 68 58 9 - 71 49 48 8 0 0 4 41 10 50 131 -70 - 72 6 58 - 71 32 43 - 74 2 55 - 69 41 2 - 72 35 0 7 0 0 4 41 22 50 129 -71 - 72 52 19 - 72 17 46 - 74 49 24 - 70 25 9 - 73 21 37 6 0 0 4 41 33 51 128 -72 - 73 39 6 - 73 4 12 - 75 37 26 - 71 10 33 - 74 9 43 5 0 0 4 41 44 51 126 -72 - 74 27 24 - 73 52 7 - 76 27 7 - 71 57 18 - 74 59 23 4 0 0 4 41 56 50 124 -73 - 75 17 17 - 74 41 35 - 77 18 33 - 72 45 29 - 75 50 44 3 0 0 4 42 8 50 123 -74 - 76 8 53 - 75 32 42 - 78 11 52 - 73 35 10 - 76 43 52 2 0 0 4 42 20 50 121 -74 - 77 2 16 - 76 25 34 - 79 7 10 - 74 26 27 - 77 38 55 1 0 0 4 42 32 50 120 -75 - 77 57 36 - 77 20 19 - 80 4 37 - 75 19 27 - 78 35 59 0 0 0 4 42 44 50 118 -75 - 78 55 0 - 78 17 5 - 81 4 23 - 76 14 16 - 79 35 15 - 1 0 0 4 42 57 49 117 -75 - 79 54 38 - 79 16 0 - 82 6 39 - 77 11 2 Latitude Latitude Latitude Latitude - 81 0 0 - 2 21 52 4 43 14 49 115 -75 - 2 3 8 - 2 40 29 0 4 19 - 4 41 26 - 82 0 0 - 3 17 10 4 43 26 48 113 -75 - 2 58 46 - 3 35 27 - 0 53 42 - 5 34 21 - 83 0 0 - 4 10 20 4 43 37 48 112 -75 - 3 52 15 - 4 28 19 - 1 49 26 - 6 25 17 - 84 0 0 - 5 1 27 4 43 48 47 111 -75 - 4 43 40 - 5 19 9 - 2 42 57 - 7 14 18 - 85 0 0 - 5 50 35 4 43 59 46 110 -74 - 5 33 5 - 6 8 0 - 3 34 21 - 8 1 26 - 86 0 0 - 6 37 48 4 44 10 46 109 -74 - 6 20 33 - 6 54 57 - 4 23 41 - 8 46 46 - 87 0 0 - 7 23 9 4 44 20 45 108 -73 - 7 6 9 - 7 40 4 - 5 11 2 - 9 30 20 - 88 0 0 - 8 6 42 4 44 30 44 107 -72 - 7 49 56 - 8 23 22 - 5 56 28 -10 12 12 - 89 0 0 - 8 48 29 4 44 40 44 106 -71 - 8 31 57 - 9 4 57 - 6 40 2 -10 52 24 - 90 0 0 - 9 28 35 4 44 49 43 106 -71 - 9 12 15 - 9 44 50 - 7 21 48 -11 30 59 - 91 0 0 -10 7 1 4 44 59 42 105 -70 - 9 50 53 -10 23 5 - 8 1 49 -12 8 0 - 92 0 0 -10 43 51 4 45 8 41 104 -69 -10 27 54 -10 59 43 - 8 40 8 -12 43 29 - 93 0 0 -11 19 6 4 45 16 41 104 -68 -11 3 20 -11 34 49 - 9 16 49 -13 17 28 - 94 0 0 -11 52 50 4 45 25 40 103 -67 -11 37 14 -12 8 23 - 9 51 52 -13 50 0 - 95 0 0 -12 25 5 4 45 33 39 103 -66 -12 9 38 -12 40 28 -10 25 22 -14 21 6 - 96 0 0 -12 55 53 4 45 41 38 103 -65 -12 40 35 -13 11 7 -10 57 21 -14 50 48 - 97 0 0 -13 25 15 4 45 49 37 102 -64 -13 10 5 -13 40 21 -11 27 50 -15 19 10 - 98 0 0 -13 53 14 4 45 57 37 102 -63 -13 38 12 -14 8 12 -11 56 52 -15 46 11 - 99 0 0 -14 19 51 4 46 4 36 102 -62 -14 4 57 -14 34 42 -12 24 29 -16 11 54 -100 0 0 -14 45 9 4 46 11 35 102 -61 -14 30 21 -14 59 52 -12 50 42 -16 36 20 -101 0 0 -15 9 8 4 46 18 34 101 -60 -14 54 27 -15 23 45 -13 15 34 -16 59 31 -102 0 0 -15 31 50 4 46 25 33 101 -60 -15 17 16 -15 46 21 -13 39 6 -17 21 28 -103 0 0 -15 53 17 4 46 31 32 101 -59 -15 38 49 -16 7 43 -14 1 19 -17 42 12 -104 0 0 -16 13 30 4 46 38 32 101 -58 -15 59 7 -16 27 50 -14 22 15 -18 1 46 -105 0 0 -16 32 30 4 46 44 31 101 -57 -16 18 12 -16 46 45 -14 41 55 -18 20 9 -106 0 0 -16 50 18 4 46 50 30 101 -56 -16 36 5 -17 4 29 -15 0 20 -18 37 22 -107 0 0 -17 6 56 4 46 55 29 101 -55 -16 52 47 -17 21 2 -15 17 32 -18 53 28 -108 0 0 -17 22 24 4 47 1 28 101 -54 -17 8 19 -17 36 26 -15 33 31 -19 8 26 -109 0 0 -17 36 42 4 47 6 27 101 -53 -17 22 41 -17 50 41 -15 48 19 -19 22 18 -110 0 0 -17 49 53 4 47 11 26 101 -52 -17 35 55 -18 3 48 -16 1 56 -19 35 5 -111 0 0 -18 1 57 4 47 16 26 102 -51 -17 48 2 -18 15 49 -16 14 24 -19 46 46 -112 0 0 -18 12 53 4 47 21 25 102 -50 -17 59 1 -18 26 43 -16 25 42 -19 57 23 -113 0 0 -18 22 44 4 47 26 24 102 -49 -18 8 54 -18 36 31 -16 35 51 -20 6 56 -114 0 0 -18 31 29 4 47 30 23 102 -48 -18 17 41 -18 45 14 -16 44 53 -20 15 25 -115 0 0 -18 39 9 4 47 35 22 102 -47 -18 25 23 -18 52 52 -16 52 47 -20 22 52 -116 0 0 -18 45 44 4 47 39 21 102 -46 -18 31 59 -18 59 26 -16 59 34 -20 29 16 -117 0 0 -18 51 14 4 47 43 20 103 -45 -18 37 31 -19 4 55 -17 5 13 -20 34 37 -118 0 0 -18 55 41 4 47 46 19 103 -44 -18 41 58 -19 9 20 -17 9 47 -20 38 57 -119 0 0 -18 59 3 4 47 50 18 103 -44 -18 45 21 -19 12 42 -17 13 14 -20 42 15 -120 0 0 -19 1 21 4 47 53 18 103 -43 -18 47 40 -19 15 0 -17 15 34 -20 44 31 -121 0 0 -19 2 35 4 47 57 17 104 -42 -18 48 54 -19 16 14 -17 16 48 -20 45 45 -122 0 0 -19 2 45 4 48 0 16 104 -41 -18 49 3 -19 16 24 -17 16 56 -20 45 57 -123 0 0 -19 1 51 4 48 3 15 104 -40 -18 48 9 -19 15 31 -17 15 57 -20 45 7 -124 0 0 -18 59 53 4 48 6 14 104 -39 -18 46 9 -19 13 33 -17 13 51 -20 43 15 -125 0 0 -18 56 49 4 48 8 13 105 -38 -18 43 5 -19 10 31 -17 10 39 -20 40 20 -126 0 0 -18 52 41 4 48 11 12 105 -37 -18 38 55 -19 6 24 -17 6 19 -20 36 23 -127 0 0 -18 47 28 4 48 13 11 105 -36 -18 33 40 -19 1 12 -17 0 51 -20 31 23 -128 0 0 -18 41 8 4 48 15 10 105 -35 -18 27 18 -18 54 55 -16 54 14 -20 25 19 -129 0 0 -18 33 42 4 48 17 9 106 -34 -18 19 50 -18 47 31 -16 46 29 -20 18 10 -130 0 0 -18 25 9 4 48 19 8 106 -33 -18 11 14 -18 39 1 -16 37 33 -20 9 58 -131 0 0 -18 15 28 4 48 20 7 106 -32 -18 1 30 -18 29 23 -16 27 28 .. .. .. -132 0 0 -18 4 38 4 48 22 6 107 -31 -17 50 36 -18 18 37 -16 16 10 .. .. .. -133 0 0 -17 52 39 4 48 23 5 107 -30 -17 38 33 -18 6 41 -16 3 40 .. .. .. -134 0 0 -17 39 28 4 48 24 4 107 -29 -17 25 19 -17 53 35 -15 49 57 .. .. .. -135 0 0 -17 25 7 4 48 25 3 108 -28 -17 10 52 -17 39 18 -15 34 59 .. .. .. -136 0 0 -17 9 32 4 48 25 2 108 -27 -16 55 13 -17 23 48 -15 18 44 .. .. .. -137 0 0 -16 52 43 4 48 26 2 108 -26 -16 38 18 -17 7 4 -15 1 13 .. .. .. -138 0 0 -16 34 38 4 48 26 1 108 -25 -16 20 7 -16 49 5 .. .. .. .. .. .. Uncertainty in time = +/- 14 secs [Prediction of 2008 Aug 6.0] Data for the target star ------------------------ * name: TYC 6408-00119-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 23 55 00.4106 DE: -17 47 50.403 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .022, .022 ) * V mag [mag]: 10.9 * B mag [mag]: 11.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4967) Glia approx. diameter [km]: 39 approx. diameter ["]: .026 distance from Earth [AU]: 2.08300 * orbital information: orbit source: Preston date of fit: 2008 Aug 05 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 555 number of rejected observations: 10 time covered by the observations: 1958 Oct 16 - 2008 Jul 28 1 sigma uncertainty ellipse (major, minor, PA): 0.107, 0.056, 77° remarks: * orbital elements for (4967) Glia : Mean anomaly = 357.65676759 deg Arg. of pericenter = 222.62434963 deg Long. of node = 125.04183531 deg Inclination = 16.98544992 deg Eccentricity = 0.04218197 Semimajor axis = 3.14764110 AU Perihelion dist = 3.01486739 AU Mag: H = 11.13, G = 0.15 Epoch of elements : MJD 54699.19600000 TDT (2008 Aug 21.196) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Aug 21 4967 Glia 4h 41.6m UT 10.9 23 55 0.411-17 47 50.40TYC 6408-00119-1 11.4 15.3 39 3.2 2.083 -1.105 -23.95 -41.5336 -17.790 110.37 11.99 4.6936 -0.53068 0.34970 -3.73694 -5.67376 -0.00263 0.00035 2000 356.0337432008 812.00000222.624350125.041835 16.9854500.04218197 3.1476411 3.014867410.7 5.00.15 RATE 1.7649250 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.109 0.060 78 4.32 0.086 0 54684.5020080821_0119-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Aug 06, 04:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org