IOTA/IOTA-ES occultation update for (7290) Johnrather / HIP 7143 event on 2008 Oct 15, 07:18 UT Visible from NW Canada Summary ------- On 2008 Oct 15 UT, the 6 km diameter asteroid (7290) Johnrather will occult a 6.8 mag star in the constellation Pisces for observers along a path across NW Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 9.1 mag to 15.9 mag (the magnitude of the asteroid) for at most 0.4 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: . The event at a glimpse ---------------------- * Rank: 4 * date and approx. time of event: 2008 Oct 15, 07:11 - 2008 Oct 15, 07:25 UT * magnitude of target star: 6.8 * magnitude drop [mag]: 9.1 * estimated maximum duration [s]: 0.4 * Moon: 100 % sunlit, 3° distance * Sun: 171° distance * rough path description: NW Canada Additional comments ------------------- spectroscopic binary The occultation path -------------------- * approximate projected width [km]: 7 * 1 sigma uncertainty interval [path widths]: +/- 17.29 * 1 sigma uncertainty interval [seconds]: +/- 5.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .129 +/- .076) * 1 sigma uncertainty ellipse (major, minor, PA): ( .129", .076", 93° ) * approx speed of asteroid's shadow [km/s]: 13.6399 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 7143 by 7290 Johnrather on 2008 Oct 15 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude 79 22 6 83 9 50 7 11 42 10 8 -2 79 15 14 83 14 15 79 28 46 83 5 23 72 47 17 85 29 6 81 44 57 80 3 34 113 28 59 87 40 51 7 11 52 15 42 -7 113 52 6 87 43 58 113 6 43 87 37 42 154 25 28 89 16 46 105 1 48 85 40 42 -155 18 57 87 1 54 7 12 2 19 133 -11 -154 26 30 87 1 15 -156 11 53 87 2 30 -129 48 53 86 20 59 171 20 38 86 57 15 -136 48 14 84 8 14 7 12 13 22 151 -14 -136 26 18 84 7 2 -137 10 21 84 9 26 -125 25 45 83 20 1 -151 44 36 84 43 13 -131 46 20 81 23 46 7 12 23 25 156 -17 -131 32 37 81 22 32 -132 0 8 81 24 59 -124 20 42 80 37 30 -140 46 10 82 3 46 -129 42 5 78 52 19 7 12 34 27 158 -19 -129 31 56 78 51 8 -129 52 17 78 53 29 -124 4 44 78 8 49 -136 11 30 79 32 1 -128 42 58 76 31 40 7 12 44 30 158 -22 -128 34 47 76 30 33 -128 51 9 76 32 47 -124 7 36 75 50 44 -133 51 24 77 9 56 -128 14 26 74 19 46 7 12 54 32 158 -24 -128 7 32 74 18 42 -128 21 22 74 20 49 -124 19 21 73 41 4 -132 32 32 74 56 25 -128 2 34 72 15 2 7 13 5 34 158 -26 -127 56 32 72 14 1 -128 8 37 72 16 2 -124 35 49 71 38 17 -131 46 19 72 50 8 -128 0 39 70 16 17 7 13 15 36 158 -28 -127 55 16 70 15 19 -128 6 3 70 17 15 -124 55 0 69 41 15 -131 19 27 70 49 57 -128 5 8 68 22 38 7 13 25 37 157 -29 -128 0 14 68 21 42 -128 10 2 68 23 33 -125 15 49 67 49 4 -131 4 58 68 54 59 -128 13 55 66 33 19 7 13 36 39 157 -31 -128 9 24 66 32 26 -128 18 25 66 34 13 -125 37 40 66 1 5 -130 58 49 67 4 30 -128 25 43 64 47 49 7 13 46 41 156 -33 -128 21 32 64 46 57 -128 29 55 64 48 40 -126 0 9 64 16 45 -130 58 33 65 17 55 -128 39 44 63 5 38 7 13 57 42 155 -34 -128 35 49 63 4 48 -128 43 40 63 6 27 -126 23 5 62 35 37 -131 2 35 63 34 46 -128 55 24 61 26 23 7 14 7 43 154 -36 -128 51 42 61 25 34 -128 59 6 61 27 11 -126 46 18 60 57 19 -131 9 52 61 54 38 -129 12 20 59 49 44 7 14 17 45 153 -37 -129 8 49 59 48 57 -129 15 50 59 50 31 -127 9 44 59 21 32 -131 19 39 60 17 12 -129 30 15 58 15 26 7 14 28 46 152 -39 -129 26 54 58 14 41 -129 33 36 58 16 12 -127 33 17 57 48 1 -131 31 24 58 42 9 -129 48 58 56 43 15 7 14 38 47 151 -40 -129 45 46 56 42 30 -129 52 10 56 43 59 -127 56 57 56 16 33 -131 44 44 57 9 17 -130 8 21 55 12 57 7 14 48 49 150 -41 -130 5 16 55 12 14 -130 11 25 55 13 41 -128 20 42 54 46 55 -131 59 22 55 38 22 -130 28 16 53 44 23 7 14 59 50 148 -43 -130 25 19 53 43 41 -130 31 14 53 45 5 -128 44 31 53 18 58 -132 15 6 54 9 12 -130 48 40 52 17 23 7 15 9 51 147 -44 -130 45 49 52 16 41 -130 51 31 52 18 4 -129 8 24 51 52 32 -132 31 45 52 41 40 -131 9 29 50 51 48 7 15 20 52 145 -45 -131 6 43 50 51 8 -131 12 15 50 52 29 -129 32 21 50 27 29 -132 49 11 51 15 35 -131 30 40 49 27 32 7 15 30 53 144 -46 -131 27 59 49 26 52 -131 33 21 49 28 12 -129 56 23 49 3 42 -133 7 20 49 50 50 -131 52 11 48 4 27 7 15 40 54 142 -47 -131 49 35 48 3 48 -131 54 48 48 5 6 -130 20 29 47 41 5 -133 26 6 48 27 19 -132 14 1 46 42 28 7 15 51 55 141 -48 -132 11 29 46 41 50 -132 16 34 46 43 6 -130 44 41 46 19 31 -133 45 26 47 4 55 -132 36 10 45 21 29 7 16 1 56 139 -50 -132 33 41 45 20 51 -132 38 38 45 22 6 -131 8 59 44 58 56 -134 5 17 45 43 32 -132 58 35 44 1 24 7 16 11 57 137 -51 -132 56 10 44 0 47 -133 1 0 44 2 1 -131 33 23 43 39 15 -134 25 37 44 23 5 -133 21 18 42 42 10 7 16 22 58 135 -51 -133 18 56 42 41 34 -133 23 40 42 42 47 -131 57 55 42 20 22 -134 46 24 43 3 30 -133 44 17 41 23 43 7 16 32 58 133 -52 -133 41 58 41 23 7 -133 46 36 41 24 18 -132 22 35 41 2 15 -135 7 37 41 44 43 -134 7 33 40 5 57 7 16 43 59 131 -53 -134 5 16 40 5 22 -134 9 49 40 6 32 -132 47 24 39 44 49 -135 29 15 40 26 38 -134 31 6 38 48 50 7 16 53 60 129 -54 -134 28 52 38 48 15 -134 33 20 38 49 24 -133 12 23 38 28 0 -135 51 18 39 9 13 -134 54 56 37 32 17 7 17 3 60 127 -55 -134 52 45 37 31 43 -134 57 8 37 32 52 -133 37 34 37 11 45 -136 13 44 37 52 24 -135 19 5 36 16 17 7 17 14 61 124 -56 -135 16 55 36 15 43 -135 21 14 36 16 51 -134 2 56 35 56 1 -136 36 35 36 36 7 -135 43 31 35 0 45 7 17 24 61 122 -56 -135 41 24 35 0 12 -135 45 39 35 1 19 -134 28 31 34 40 45 -136 59 50 35 20 20 -136 8 17 33 45 39 7 17 34 61 119 -57 -136 6 11 33 45 6 -136 10 23 33 46 12 -134 54 21 33 25 54 -137 23 29 34 4 59 -136 33 23 32 30 56 7 17 45 62 117 -58 -136 31 19 32 30 23 -136 35 27 32 31 29 -135 20 26 32 11 26 -137 47 33 32 50 1 -136 58 49 31 16 33 7 17 55 62 114 -58 -136 56 47 31 16 1 -137 0 52 31 17 5 -135 46 47 30 57 17 -138 12 2 31 35 25 -137 24 37 30 2 28 7 18 6 62 112 -59 -137 22 36 30 1 56 -137 26 38 30 3 0 -136 13 26 29 43 25 -138 36 57 30 21 7 -137 50 48 28 48 38 7 18 16 62 109 -59 -137 48 49 28 48 7 -137 52 48 28 49 10 -136 40 25 28 29 48 -139 2 18 29 7 4 -138 17 23 27 35 1 7 18 26 62 106 -60 -138 15 25 27 34 30 -138 19 21 27 35 32 -137 7 43 27 16 23 -139 28 8 27 53 15 -138 44 23 26 21 35 7 18 37 62 104 -60 -138 42 26 26 21 4 -138 46 20 26 22 5 -137 35 24 26 3 8 -139 54 26 26 39 36 -139 11 50 25 8 16 7 18 47 62 101 -60 -139 9 54 25 7 45 -139 13 46 25 8 46 -138 3 28 24 50 1 -140 21 14 25 26 6 -139 39 45 23 55 3 7 18 57 62 99 -61 -139 37 50 23 54 33 -139 41 40 23 55 33 -138 31 57 23 37 0 -140 48 33 24 12 42 -140 8 9 22 41 54 7 19 8 62 96 -61 -140 6 15 22 41 24 -140 10 4 22 42 24 -139 0 53 22 24 1 -141 16 25 22 59 22 -140 37 6 21 28 46 7 19 18 62 94 -61 -140 35 12 21 28 16 -140 38 59 21 29 15 -139 30 18 21 11 3 -141 44 52 21 46 3 -141 6 35 20 15 36 7 19 29 61 91 -61 -141 4 42 20 15 7 -141 8 28 20 16 6 -140 0 13 19 58 4 -142 13 55 20 32 44 -141 36 40 19 2 24 7 19 39 61 89 -61 -141 34 48 19 1 55 -141 38 32 19 2 53 -140 30 42 18 45 2 -142 43 36 19 19 21 -142 7 23 17 49 5 7 19 49 60 87 -61 -142 5 32 17 48 37 -142 9 14 17 49 34 -141 1 45 17 31 53 -143 13 58 18 5 53 -142 38 46 16 35 39 7 20 0 60 84 -61 -142 36 55 16 35 11 -142 40 37 16 36 7 -141 33 26 16 18 36 -143 45 2 16 52 17 -143 10 52 15 22 2 7 20 10 59 82 -60 -143 9 1 15 21 34 -143 12 42 15 22 30 -142 5 47 15 5 9 -144 16 53 15 38 30 -143 43 43 14 8 12 7 20 20 58 80 -60 -143 41 53 14 7 44 -143 45 33 14 8 40 -142 38 51 13 51 28 -144 49 31 14 24 31 -144 17 24 12 54 6 7 20 31 58 78 -60 -144 15 34 12 53 39 -144 19 13 12 54 34 -143 12 42 12 37 32 -145 23 1 13 10 15 -144 51 56 11 39 42 7 20 41 57 77 -59 -144 50 7 11 39 15 -144 53 46 11 40 10 -143 47 22 11 23 17 -145 57 26 11 55 42 -145 27 25 10 24 57 7 20 52 56 75 -59 -145 25 36 10 24 30 -145 29 15 10 25 24 -144 22 56 10 8 41 -146 32 51 10 40 47 -146 3 55 9 9 48 7 21 2 55 73 -58 -146 2 5 9 9 21 -146 5 44 9 10 14 -144 59 28 8 53 41 -147 9 18 9 25 28 -146 41 30 7 54 11 7 21 12 54 72 -58 -146 39 40 7 53 44 -146 43 19 7 54 37 -145 37 2 7 38 13 -147 46 54 8 9 41 -147 20 15 6 38 3 7 21 23 53 70 -57 -147 18 25 6 37 37 -147 22 4 6 38 30 -146 15 44 6 22 15 -148 25 44 6 53 23 -148 0 16 5 21 22 7 21 33 52 69 -56 -147 58 26 5 20 56 -148 2 6 5 21 47 -146 55 39 5 5 43 -149 5 53 5 36 31 -148 41 41 4 4 1 7 21 43 51 68 -55 -148 39 50 4 3 36 -148 43 31 4 4 27 -147 36 53 3 48 33 -149 47 29 4 19 0 -149 24 35 2 45 59 7 21 54 50 66 -54 -149 22 45 2 45 33 -149 26 26 2 46 24 -148 19 34 2 30 41 -150 30 39 3 0 47 -150 9 9 1 27 9 7 22 4 49 65 -53 -150 7 18 1 26 44 -150 11 0 1 27 34 -149 3 50 1 12 2 -151 15 32 1 41 45 -150 55 31 0 7 27 7 22 15 48 64 -52 -150 53 39 0 7 2 -150 57 23 0 7 52 -149 49 50 - 0 7 28 -152 2 18 0 21 50 -151 43 53 - 1 13 13 7 22 25 47 63 -51 -151 42 0 - 1 13 37 -151 45 45 - 1 12 48 -150 37 44 - 1 27 55 -152 51 9 - 0 59 3 -152 34 27 - 2 34 57 7 22 35 45 63 -50 -152 32 33 - 2 35 21 -152 36 20 - 2 34 33 -151 27 46 - 2 49 26 -153 42 18 - 2 21 2 -153 27 28 - 3 57 53 7 22 46 44 62 -49 -153 25 34 - 3 58 16 -153 29 23 - 3 57 29 -152 20 9 - 4 12 8 -154 36 2 - 3 44 14 -154 23 15 - 5 22 9 7 22 56 42 61 -48 -154 21 19 - 5 22 32 -154 25 11 - 5 21 46 -153 15 10 - 5 36 7 -155 32 38 - 5 8 47 -155 22 8 - 6 47 54 7 23 6 41 61 -46 -155 20 10 - 6 48 16 -155 24 5 - 6 47 31 -154 13 10 - 7 1 34 -156 32 30 - 6 34 52 -156 24 32 - 8 15 19 7 23 17 39 60 -45 -156 22 33 - 8 15 41 -156 26 31 - 8 14 57 -155 14 30 - 8 28 40 -157 36 4 - 8 2 41 -157 30 59 - 9 44 38 7 23 27 38 60 -43 -157 28 58 - 9 45 0 -157 33 1 - 9 44 17 -156 19 42 - 9 57 36 -158 43 54 - 9 32 26 -158 42 8 -11 16 8 7 23 38 36 59 -42 -158 40 4 -11 16 28 -158 44 12 -11 15 47 -157 29 21 -11 28 38 -159 56 42 -11 4 26 -159 58 46 -12 50 6 7 23 48 34 59 -40 -159 56 39 -12 50 26 -160 0 54 -12 49 47 -158 44 11 -13 2 4 -161 15 22 -12 39 1 -161 21 59 -14 26 59 7 23 58 32 59 -38 -161 19 48 -14 27 18 -161 24 10 -14 26 41 -160 5 11 -14 38 18 -162 41 3 -14 16 39 -162 53 10 -16 7 19 7 24 9 30 59 -36 -162 50 54 -16 7 36 -162 55 26 -16 7 2 -161 33 37 -16 17 50 -164 15 20 -15 57 54 -164 34 17 -17 51 48 7 24 19 28 59 -34 -164 31 54 -17 52 3 -164 36 39 -17 51 33 -163 11 13 -18 1 17 -166 0 27 -17 43 36 -166 28 9 -19 41 29 7 24 29 25 59 -32 -166 25 38 -19 41 42 -166 30 40 -19 41 17 -165 0 29 -19 49 36 -167 59 42 -19 34 55 -168 39 10 -21 37 54 7 24 40 23 60 -29 -168 36 27 -21 38 3 -168 41 52 -21 37 45 -167 5 6 -21 44 5 -170 18 22 -21 33 40 -171 14 46 -23 43 36 7 24 50 20 60 -26 -171 11 46 -23 43 39 -171 17 47 -23 43 33 -169 31 11 -23 46 52 -173 5 52 -23 43 2 -174 29 44 -26 3 30 7 25 1 16 62 -22 -174 26 12 -26 3 24 -174 33 16 -26 3 36 -172 29 59 -26 1 46 -176 42 37 -26 9 45 -179 3 11 -28 50 22 7 25 11 11 64 -18 -178 58 24 -28 49 52 -179 7 59 -28 50 52 -176 27 26 -28 37 19 177 43 2 -29 15 48 Uncertainty in time = +/- 8 secs [Prediction of 2008 Oct 1.0] Data for the target star ------------------------ * name: HIP 7143 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 32 03.2007 DE: +16 56 48.302 * position source: mpos:HIP pm:HIP plx:HIP * standard error: RA,DE ["]: ( .015, .009 ) * V mag [mag]: 6.8 * B mag [mag]: 7.7 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (7290) Johnrather approx. diameter [km]: 6 approx. diameter ["]: .007 distance from Earth [AU]: 1.14800 * orbital information: orbit source: Preston date of fit: 2008 Sep 30 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 420 number of rejected observations: 2 time covered by the observations: 1954 Apr 02 - 2008 Sep 30 1 sigma uncertainty ellipse (major, minor, PA): 0.128, 0.075, 93° remarks: * orbital elements for (7290) Johnrather : Mean anomaly = 35.29516987 deg Arg. of pericenter = 116.68525201 deg Long. of node = 212.99750186 deg Inclination = 24.75662649 deg Eccentricity = 0.22846805 Semimajor axis = 2.55582952 AU Perihelion dist = 1.97190412 AU Mag: H = 13.66, G = 0.15 Epoch of elements : MJD 54754.30400000 TDT (2008 Oct 15.304) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Oct 15 7290 Johnrather 7h 18.4m UT 6.8 1 32 3.201 16 56 48.30HIP 7143 7.7 15.9 6 0.4 1.148 -1.871 -52.51 -110.7942 16.962 66.83 -8.69 7.3073 -0.41123 0.21046 -3.50482 -6.85472 -0.00024 -0.00078 2000 34.25697620081011.00000116.685252212.997502 24.7566260.22846805 2.5558295 1.971904113.6 5.00.15 RATE 2.4121610 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.129 0.076 93 18.29 0.125 0 54740.5020081015___7143 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 01, 04:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org