IOTA/IOTA-ES occultation update for (6422) Akagi / TYC 5759-00002-1 event on 2008 May 16, 13:37 UT Visible from E Australia Summary ------- On 2008 May 16 UT, the 15 km diameter asteroid (6422) Akagi will occult a 10.2 mag star in the constellation Capricornus for observers along a path across E Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.6 mag to 15.8 mag (the magnitude of the asteroid) for at most 1.4 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: UCAC. The event at a glimpse ---------------------- * Rank: 12 * date and approx. time of event: 2008 May 16, 13:28 - 2008 May 16, 13:41 UT * midpoint of event [JD]: 2454603.06804167 * magnitude of target star: 10.2 * magnitude drop [mag]: 5.6 * estimated maximum duration [s]: 1.4 * Moon: 89 % sunlit, 111° distance * Sun: 107° distance * rough path description: E Australia The occultation path -------------------- * approximate projected width [km]: 16 * 1 sigma uncertainty interval [path widths]: +/- 5.53 * 1 sigma uncertainty interval [seconds]: +/- 13.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .112 +/- .066) * 1 sigma uncertainty ellipse (major, minor, PA): ( .113", .065", 97° ) * approx speed of asteroid's shadow [km/s]: 10.4808 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5759-00002-1 by 6422 Akagi on 2008 May 16 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 139 0 0 -20 28 46 13 28 22 1 101 -73 -20 33 9 -20 24 23 -21 21 49 .. .. .. 140 0 0 -20 39 55 13 28 22 2 101 -74 -20 44 18 -20 35 32 -21 32 57 .. .. .. 141 0 0 -20 51 1 13 28 22 3 100 -75 -20 55 24 -20 46 38 -21 44 3 .. .. .. 142 0 0 -21 2 5 13 28 23 4 100 -76 -21 6 28 -20 57 42 -21 55 7 .. .. .. 143 0 0 -21 13 7 13 28 24 5 99 -77 -21 17 30 -21 8 44 -22 6 7 -20 20 22 144 0 0 -21 24 5 13 28 25 6 99 -78 -21 28 28 -21 19 42 -22 17 6 -20 31 21 145 0 0 -21 35 1 13 28 26 6 99 -78 -21 39 24 -21 30 38 -22 28 1 -20 42 18 146 0 0 -21 45 53 13 28 27 7 98 -79 -21 50 16 -21 41 30 -22 38 53 -20 53 10 147 0 0 -21 56 42 13 28 29 8 98 -80 -22 1 5 -21 52 19 -22 49 41 -21 4 0 148 0 0 -22 7 27 13 28 30 9 98 -81 -22 11 50 -22 3 5 -23 0 26 -21 14 46 149 0 0 -22 18 9 13 28 32 10 97 -82 -22 22 32 -22 13 46 -23 11 6 -21 25 28 150 0 0 -22 28 46 13 28 34 11 97 -83 -22 33 9 -22 24 23 -23 21 43 -21 36 6 151 0 0 -22 39 19 13 28 36 12 96 -83 -22 43 42 -22 34 57 -23 32 15 -21 46 40 152 0 0 -22 49 48 13 28 39 13 96 -84 -22 54 11 -22 45 25 -23 42 43 -21 57 9 153 0 0 -23 0 12 13 28 41 14 96 -85 -23 4 34 -22 55 49 -23 53 6 -22 7 34 154 0 0 -23 10 31 13 28 44 15 95 -85 -23 14 53 -23 6 9 -24 3 25 -22 17 54 155 0 0 -23 20 45 13 28 47 16 95 -85 -23 25 7 -23 16 23 -24 13 38 -22 28 9 156 0 0 -23 30 54 13 28 50 17 94 -85 -23 35 16 -23 26 32 -24 23 46 -22 38 19 157 0 0 -23 40 57 13 28 53 18 94 -85 -23 45 19 -23 36 35 -24 33 48 -22 48 23 158 0 0 -23 50 55 13 28 56 19 93 -85 -23 55 17 -23 46 33 -24 43 45 -22 58 22 159 0 0 -24 0 47 13 29 0 20 93 -85 -24 5 9 -23 56 25 -24 53 35 -23 8 14 160 0 0 -24 10 32 13 29 3 21 93 -84 -24 14 54 -24 6 11 -25 3 20 -23 18 1 161 0 0 -24 20 12 13 29 7 22 92 -83 -24 24 34 -24 15 50 -25 12 59 -23 27 42 162 0 0 -24 29 45 13 29 11 23 92 -83 -24 34 7 -24 25 24 -25 22 31 -23 37 16 163 0 0 -24 39 12 13 29 15 23 91 -82 -24 43 34 -24 34 50 -25 31 56 -23 46 44 164 0 0 -24 48 32 13 29 19 24 91 -81 -24 52 54 -24 44 10 -25 41 15 -23 56 5 165 0 0 -24 57 45 13 29 24 25 90 -80 -25 2 7 -24 53 24 -25 50 27 -24 5 19 166 0 0 -25 6 51 13 29 28 26 90 -80 -25 11 12 -25 2 30 -25 59 32 -24 14 27 167 0 0 -25 15 50 13 29 33 27 89 -79 -25 20 11 -25 11 28 -26 8 29 -24 23 26 168 0 0 -25 24 41 13 29 38 28 89 -78 -25 29 2 -25 20 20 -26 17 19 -24 32 19 169 0 0 -25 33 25 13 29 43 29 88 -77 -25 37 46 -25 29 4 -26 26 2 -24 41 4 170 0 0 -25 42 1 13 29 48 30 88 -76 -25 46 22 -25 37 40 -26 34 37 -24 49 41 171 0 0 -25 50 29 13 29 53 31 87 -75 -25 54 50 -25 46 8 -26 43 4 -24 58 11 172 0 0 -25 58 49 13 29 59 32 86 -74 -26 3 10 -25 54 29 -26 51 23 -25 6 32 173 0 0 -26 7 1 13 30 4 33 86 -73 -26 11 22 -26 2 41 -26 59 33 -25 14 45 174 0 0 -26 15 5 13 30 10 34 85 -72 -26 19 26 -26 10 44 -27 7 36 -25 22 50 175 0 0 -26 23 0 13 30 16 34 85 -72 -26 27 21 -26 18 40 -27 15 30 -25 30 47 176 0 0 -26 30 47 13 30 22 35 84 -71 -26 35 7 -26 26 26 -27 23 15 -25 38 35 177 0 0 -26 38 25 13 30 28 36 83 -70 -26 42 45 -26 34 4 -27 30 51 -25 46 14 178 0 0 -26 45 54 13 30 34 37 83 -69 -26 50 14 -26 41 34 -27 38 19 -25 53 44 179 0 0 -26 53 14 13 30 40 38 82 -68 -26 57 34 -26 48 54 -27 45 38 -26 1 6 180 0 0 -27 0 25 13 30 47 39 82 -67 -27 4 45 -26 56 5 -27 52 48 -26 8 18 -179 0 0 -27 7 26 13 30 53 40 81 -66 -27 11 46 -27 3 7 -27 59 48 -26 15 21 -178 0 0 -27 14 19 13 31 0 41 80 -65 -27 18 39 -27 9 59 -28 6 39 -26 22 15 -177 0 0 -27 21 2 13 31 7 42 79 -64 -27 25 21 -27 16 42 -28 13 21 -26 28 59 -176 0 0 -27 27 35 13 31 14 42 79 -63 -27 31 54 -27 23 15 -28 19 53 -26 35 33 -175 0 0 -27 33 59 13 31 21 43 78 -62 -27 38 18 -27 29 39 -28 26 15 -26 41 58 -174 0 0 -27 40 12 13 31 28 44 77 -61 -27 44 32 -27 35 53 -28 32 28 -26 48 13 -173 0 0 -27 46 16 13 31 35 45 76 -61 -27 50 36 -27 41 57 -28 38 30 -26 54 18 -172 0 0 -27 52 10 13 31 42 46 76 -60 -27 56 29 -27 47 51 -28 44 23 -27 0 13 -171 0 0 -27 57 54 13 31 50 47 75 -59 -28 2 13 -27 53 35 -28 50 6 -27 5 58 -170 0 0 -28 3 28 13 31 57 48 74 -58 -28 7 47 -27 59 9 -28 55 38 -27 11 33 -169 0 0 -28 8 51 13 32 5 48 73 -57 -28 13 10 -28 4 32 -29 1 0 -27 16 58 -168 0 0 -28 14 4 13 32 13 49 72 -56 -28 18 23 -28 9 45 -29 6 12 -27 22 12 -167 0 0 -28 19 7 13 32 20 50 71 -55 -28 23 25 -28 14 48 -29 11 14 -27 27 16 -166 0 0 -28 23 59 13 32 28 51 70 -54 -28 28 17 -28 19 40 -29 16 5 -27 32 9 -165 0 0 -28 28 40 13 32 36 52 69 -53 -28 32 59 -28 24 22 -29 20 45 -27 36 51 -164 0 0 -28 33 11 13 32 44 53 68 -52 -28 37 29 -28 28 53 -29 25 15 -27 41 23 -163 0 0 -28 37 31 13 32 53 53 67 -51 -28 41 49 -28 33 13 -29 29 34 -27 45 44 -162 0 0 -28 41 40 13 33 1 54 66 -51 -28 45 58 -28 37 22 -29 33 42 -27 49 54 -161 0 0 -28 45 38 13 33 9 55 65 -50 -28 49 57 -28 41 20 -29 37 39 -27 53 53 -160 0 0 -28 49 26 13 33 18 56 64 -49 -28 53 44 -28 45 8 -29 41 26 -27 57 42 -159 0 0 -28 53 2 13 33 26 57 63 -48 -28 57 20 -28 48 44 -29 45 1 -28 1 19 -158 0 0 -28 56 28 13 33 35 57 62 -47 -29 0 46 -28 52 10 -29 48 26 -28 4 45 -157 0 0 -28 59 42 13 33 43 58 60 -46 -29 4 0 -28 55 24 -29 51 39 -28 8 0 -156 0 0 -29 2 45 13 33 52 59 59 -45 -29 7 3 -28 58 27 -29 54 42 -28 11 4 -155 0 0 -29 5 37 13 34 1 60 58 -44 -29 9 54 -29 1 19 -29 57 33 -28 13 56 -154 0 0 -29 8 17 13 34 10 60 56 -43 -29 12 35 -29 4 0 -30 0 13 -28 16 37 -153 0 0 -29 10 46 13 34 18 61 55 -42 -29 15 4 -29 6 29 -30 2 41 -28 19 7 -152 0 0 -29 13 4 13 34 27 62 53 -41 -29 17 22 -29 8 47 -30 4 59 -28 21 26 -151 0 0 -29 15 11 13 34 36 62 52 -41 -29 19 29 -29 10 54 -30 7 5 -28 23 33 -150 0 0 -29 17 6 13 34 45 63 50 -40 -29 21 24 -29 12 49 -30 8 59 -28 25 29 -149 0 0 -29 18 50 13 34 54 64 48 -39 -29 23 7 -29 14 32 -30 10 43 -28 27 13 -148 0 0 -29 20 22 13 35 4 64 46 -38 -29 24 40 -29 16 5 -30 12 14 -28 28 45 -147 0 0 -29 21 43 13 35 13 65 45 -37 -29 26 0 -29 17 26 -30 13 35 -28 30 6 -146 0 0 -29 22 52 13 35 22 66 43 -36 -29 27 9 -29 18 35 -30 14 44 -28 31 16 -145 0 0 -29 23 50 13 35 31 66 40 -35 -29 28 7 -29 19 32 -30 15 41 -28 32 14 -144 0 0 -29 24 36 13 35 41 67 38 -34 -29 28 53 -29 20 19 -30 16 27 -28 33 0 -143 0 0 -29 25 10 13 35 50 67 36 -33 -29 29 28 -29 20 53 -30 17 1 -28 33 35 -142 0 0 -29 25 33 13 35 59 68 34 -32 -29 29 51 -29 21 16 -30 17 24 -28 33 58 -141 0 0 -29 25 45 13 36 9 68 31 -32 -29 30 2 -29 21 28 -30 17 36 -28 34 10 -140 0 0 -29 25 45 13 36 18 69 29 -31 -29 30 2 -29 21 27 -30 17 35 -28 34 9 -139 0 0 -29 25 33 13 36 28 69 26 -30 -29 29 50 -29 21 16 -30 17 24 -28 33 58 -138 0 0 -29 25 9 13 36 37 70 23 -29 -29 29 27 -29 20 52 -30 17 0 -28 33 34 -137 0 0 -29 24 34 13 36 47 70 21 -28 -29 28 52 -29 20 17 -30 16 25 -28 32 59 -136 0 0 -29 23 48 13 36 56 70 18 -27 -29 28 5 -29 19 31 -30 15 39 -28 32 12 -135 0 0 -29 22 50 13 37 6 71 15 -26 -29 27 7 -29 18 32 -30 14 41 -28 31 14 -134 0 0 -29 21 40 13 37 16 71 12 -25 -29 25 57 -29 17 22 -30 13 31 -28 30 4 -133 0 0 -29 20 18 13 37 25 71 9 -24 -29 24 36 -29 16 1 -30 12 10 -28 28 42 -132 0 0 -29 18 45 13 37 35 71 5 -23 -29 23 3 -29 14 28 -30 10 38 -28 27 9 -131 0 0 -29 17 1 13 37 45 71 2 -23 -29 21 19 -29 12 44 -30 8 54 -28 25 24 -130 0 0 -29 15 5 13 37 54 71 359 -22 -29 19 23 -29 10 48 -30 6 58 -28 23 27 -129 0 0 -29 12 58 13 38 4 71 356 -21 -29 17 15 -29 8 40 -30 4 51 -28 21 19 -128 0 0 -29 10 39 13 38 14 71 353 -20 -29 14 56 -29 6 21 -30 2 33 -28 19 0 -127 0 0 -29 8 8 13 38 23 71 350 -19 -29 12 26 -29 3 51 -30 0 3 -28 16 29 -126 0 0 -29 5 26 13 38 33 71 346 -18 -29 9 44 -29 1 9 -29 57 22 -28 13 47 -125 0 0 -29 2 33 13 38 42 71 343 -17 -29 6 51 -28 58 16 -29 54 29 -28 10 53 -124 0 0 -28 59 29 13 38 52 71 340 -16 -29 3 47 -28 55 11 -29 51 26 -28 7 48 -123 0 0 -28 56 13 13 39 2 70 337 -15 -29 0 31 -28 51 55 -29 48 11 -28 4 31 -122 0 0 -28 52 46 13 39 11 70 334 -14 -28 57 4 -28 48 28 -29 44 44 -28 1 3 -121 0 0 -28 49 8 13 39 21 70 332 -14 -28 53 26 -28 44 50 -29 41 7 -27 57 24 -120 0 0 -28 45 18 13 39 31 69 329 -13 -28 49 36 -28 41 0 -29 37 18 -27 53 34 -119 0 0 -28 41 18 13 39 40 69 326 -12 -28 45 36 -28 37 0 -29 33 19 -27 49 32 -118 0 0 -28 37 6 13 39 50 68 324 -11 -28 41 25 -28 32 48 -29 29 8 -27 45 20 -117 0 0 -28 32 44 13 39 59 68 321 -10 -28 37 2 -28 28 26 -29 24 47 -27 40 57 -116 0 0 -28 28 10 13 40 9 67 319 -9 -28 32 29 -28 23 52 -29 20 14 -27 36 22 -115 0 0 -28 23 26 13 40 18 67 317 -8 -28 27 44 -28 19 8 -29 15 31 -27 31 37 -114 0 0 -28 18 31 13 40 28 66 315 -7 -28 22 49 -28 14 12 -29 10 37 -27 26 41 -113 0 0 -28 13 25 13 40 37 66 313 -6 -28 17 44 -28 9 6 -29 5 32 -27 21 34 -112 0 0 -28 8 9 13 40 47 65 311 -5 -28 12 27 -28 3 50 -29 0 17 -27 16 16 -111 0 0 -28 2 42 13 40 56 64 309 -5 -28 7 0 -27 58 23 -28 54 51 -27 10 48 -110 0 0 -27 57 4 13 41 5 64 307 -4 -28 1 23 -27 52 45 -28 49 15 -27 5 9 -109 0 0 -27 51 16 13 41 14 63 305 -3 -27 55 35 -27 46 57 -28 43 28 -26 59 20 -108 0 0 -27 45 18 13 41 24 62 304 -2 -27 49 37 -27 40 59 -28 37 31 -26 53 21 -107 0 0 -27 39 9 13 41 33 62 302 -1 -27 43 29 -27 34 50 -28 31 24 -26 47 11 -106 0 0 -27 32 51 13 41 42 61 301 0 -27 37 10 -27 28 32 -28 25 6 -26 40 51 Uncertainty in time = +/- 13 secs [Prediction of 2008 Apr 9.0] Data for the target star ------------------------ * name: TYC 5759-00002-1 * constellation : Capricornus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 34 49.0619 DE: -10 30 05.594 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .019 ) * V mag [mag]: 10.2 * B mag [mag]: 11.4 * Apparent position with proper motion RA(deg): 308.8228781588 DE(deg): -10.4736191639 * Equation of equinoxes (radians) : 0.000039782398707 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (6422) Akagi approx. diameter [km]: 15 approx. diameter ["]: .012 distance from Earth [AU]: 1.70500 * orbital information: orbit source: Preston date of fit: 2008 Apr 08 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 548 number of rejected observations: 18 time covered by the observations: 1986 May 01 - 2007 Jun 07 1 sigma uncertainty ellipse (major, minor, PA): 0.111, 0.062, 97° remarks: * orbital elements for (6422) Akagi : Mean anomaly = 351.70994354 deg Arg. of pericenter = 166.69908858 deg Long. of node = 126.57843996 deg Inclination = 14.63008627 deg Eccentricity = 0.15379860 Semimajor axis = 2.62477011 AU Perihelion dist = 2.22108414 AU Mag: H = 12.22, G = 0.15 Epoch of elements : MJD 54602.56800000 TDT (2008 May 16.568) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 16 6422 Akagi 13h 38.0m UT 10.2 20 34 49.062-10 30 5.59TYC 5759-00002-1 11.4 15.8 15 1.4 1.705 2.067 1.03 -130.4298 -10.502 -25.40 19.27 13.6330 0.01202 -0.31868 5.91218 0.20196 -0.00484 -0.00149 2000 351.1147452008 514.00000166.699089126.578440 14.6300860.15379860 2.6247701 2.221084111.7 5.00.15 RATE 2.3177530 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.113 0.065 97 6.53 0.067 0 54565.5020080516_0002-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 13, 00:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org