IOTA/IOTA-ES occultation update for (2696) Magion / TYC 4772-00447-1 event on 2009 Oct 04, 08:05 UT Visible from Summary ------- On 2009 Oct 04 UT, the 20 km diameter asteroid (2696) Magion will occult a 9.5 mag star in the constellation Orion for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.7 mag to 16.2 mag (the magnitude of the asteroid) for at most 1.1 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: 18 * date and approx. time of event: 2009 Oct 04, 07:59 - 2009 Oct 04, 08:06 UT * magnitude of target star: 9.5 * magnitude drop [mag]: 6.7 * estimated maximum duration [s]: 1.1 * Moon: 100 % sunlit, 78° distance * Sun: 104° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 20 * 1 sigma uncertainty interval [path widths]: +/- 3.72 * 1 sigma uncertainty interval [seconds]: +/- 3.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .062 +/- .046) * 1 sigma uncertainty ellipse (major, minor, PA): ( .062", .046", 90° ) * approx speed of asteroid's shadow [km/s]: 17.7248 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4772-00447-1 by 2696 Magion on 2009 Oct 4 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 -121 6 17 62 0 0 7 59 55 5 105 -33 -121 55 55 -120 18 47 -130 13 19 -115 12 51 -114 7 51 61 0 0 7 59 57 8 111 -33 -114 42 29 -113 33 57 -119 30 14 -109 41 0 Latitude Latitude Latitude Latitude -114 0 0 60 58 39 7 59 57 8 111 -33 60 52 48 61 4 31 60 9 21 61 48 7 -113 0 0 60 48 6 7 59 58 9 112 -33 60 42 13 60 53 59 59 58 34 61 37 48 -112 0 0 60 37 3 7 59 58 9 113 -33 60 31 8 60 42 57 59 47 16 61 27 0 -111 0 0 60 25 28 7 59 59 10 114 -33 60 19 32 60 31 25 59 35 26 61 15 41 -110 0 0 60 13 22 8 0 0 10 115 -33 60 7 24 60 19 21 59 23 4 61 3 51 -109 0 0 60 0 44 8 0 0 11 116 -34 59 54 44 60 6 45 59 10 9 60 51 30 -108 0 0 59 47 33 8 0 1 12 117 -34 59 41 31 59 53 36 58 56 41 60 38 36 -107 0 0 59 33 48 8 0 2 12 117 -34 59 27 44 59 39 53 58 42 38 60 25 10 -106 0 0 59 19 29 8 0 2 13 118 -34 59 13 22 59 25 36 58 28 0 60 11 9 -105 0 0 59 4 34 8 0 3 13 119 -34 58 58 25 59 10 43 58 12 45 59 56 33 -104 0 0 58 49 2 8 0 4 14 120 -34 58 42 51 58 55 14 57 56 54 59 41 22 -103 0 0 58 32 54 8 0 5 14 121 -34 58 26 40 58 39 8 57 40 25 59 25 34 -102 0 0 58 16 7 8 0 6 15 122 -34 58 9 50 58 22 23 57 23 16 59 9 9 -101 0 0 57 58 40 8 0 7 16 123 -34 57 52 21 58 4 59 57 5 28 58 52 5 -100 0 0 57 40 34 8 0 8 16 123 -34 57 34 12 57 46 55 56 46 59 58 34 21 - 99 0 0 57 21 45 8 0 9 17 124 -34 57 15 21 57 28 10 56 27 47 58 15 56 - 98 0 0 57 2 14 8 0 10 18 125 -34 56 55 47 57 8 42 56 7 52 57 56 50 - 97 0 0 56 42 0 8 0 12 18 126 -34 56 35 30 56 48 30 55 47 13 57 37 0 - 96 0 0 56 21 0 8 0 13 19 127 -34 56 14 27 56 27 33 55 25 47 57 16 26 - 95 0 0 55 59 14 8 0 14 19 128 -34 55 52 37 56 5 50 55 3 35 56 55 6 - 94 0 0 55 36 40 8 0 16 20 129 -34 55 30 0 55 43 20 54 40 34 56 33 0 - 93 0 0 55 13 17 8 0 18 21 129 -34 55 6 34 55 20 0 54 16 44 56 10 5 - 92 0 0 54 49 4 8 0 19 22 130 -34 54 42 18 54 55 50 53 52 2 55 46 20 - 91 0 0 54 23 59 8 0 21 22 131 -34 54 17 9 54 30 48 53 26 28 55 21 44 - 90 0 0 53 58 0 8 0 23 23 132 -34 53 51 7 54 4 53 53 0 0 54 56 15 - 89 0 0 53 31 7 8 0 25 24 133 -34 53 24 10 53 38 3 52 32 36 54 29 52 - 88 0 0 53 3 17 8 0 27 24 134 -34 52 56 16 53 10 17 52 4 15 54 2 34 - 87 0 0 52 34 28 8 0 29 25 134 -34 52 27 24 52 41 33 51 34 56 53 34 18 - 86 0 0 52 4 41 8 0 31 26 135 -33 51 57 33 52 11 49 51 4 36 53 5 2 - 85 0 0 51 33 52 8 0 33 27 136 -33 51 26 40 51 41 4 50 33 14 52 34 47 - 84 0 0 51 1 59 8 0 36 28 137 -33 50 54 43 51 9 15 50 0 48 52 3 28 - 83 0 0 50 29 2 8 0 38 29 138 -33 50 21 42 50 36 22 49 27 17 51 31 5 - 82 0 0 49 54 58 8 0 41 29 139 -33 49 47 34 50 2 23 48 52 39 50 57 37 - 81 0 0 49 19 46 8 0 44 30 139 -33 49 12 18 49 27 15 48 16 52 50 23 0 - 80 0 0 48 43 25 8 0 47 31 140 -33 48 35 52 48 50 57 47 39 55 49 47 14 - 79 0 0 48 5 51 8 0 50 32 141 -32 47 58 14 48 13 28 47 1 45 49 10 16 - 78 0 0 47 27 3 8 0 53 33 142 -32 47 19 22 47 34 45 46 22 22 48 32 6 - 77 0 0 46 47 1 8 0 56 34 143 -32 46 39 16 46 54 47 45 41 43 47 52 40 - 76 0 0 46 5 42 8 1 0 35 144 -32 45 57 52 46 13 32 44 59 47 47 11 58 - 75 0 0 45 23 4 8 1 4 36 144 -32 45 15 10 45 30 58 44 16 32 46 29 58 - 74 0 0 44 39 6 8 1 8 37 145 -31 44 31 7 44 47 5 43 31 57 45 46 37 - 73 0 0 43 53 46 8 1 12 38 146 -31 43 45 44 44 1 50 42 46 1 45 1 56 - 72 0 0 43 7 4 8 1 16 39 147 -31 42 58 57 43 15 12 41 58 41 44 15 51 - 71 0 0 42 18 58 8 1 20 40 148 -30 42 10 46 42 27 10 41 9 58 43 28 22 - 70 0 0 41 29 26 8 1 25 41 149 -30 41 21 10 41 37 43 40 19 50 42 39 28 - 69 0 0 40 38 29 8 1 30 42 150 -30 40 30 8 40 46 49 39 28 16 41 49 7 - 68 0 0 39 46 4 8 1 35 43 151 -29 39 37 39 39 54 29 38 35 16 40 57 18 - 67 0 0 38 52 12 8 1 41 45 151 -29 38 43 43 39 0 41 37 40 49 40 4 2 - 66 0 0 37 56 52 8 1 46 46 152 -28 37 48 19 38 5 25 36 44 54 39 9 17 - 65 0 0 37 0 4 8 1 52 47 153 -28 36 51 27 37 8 41 35 47 33 38 13 3 - 64 0 0 36 1 48 8 1 58 48 154 -27 35 53 7 36 10 29 34 48 45 37 15 20 - 63 0 0 35 2 5 8 2 4 50 155 -27 34 53 21 35 10 50 33 48 30 36 16 10 - 62 0 0 34 0 56 8 2 11 51 156 -26 33 52 8 34 9 44 32 46 51 35 15 31 - 61 0 0 32 58 21 8 2 18 52 157 -25 32 49 30 33 7 13 31 43 48 34 13 26 - 60 0 0 31 54 23 8 2 25 53 158 -25 31 45 28 32 3 18 30 39 22 33 9 55 - 59 0 0 30 49 3 8 2 32 55 159 -24 30 40 5 30 58 1 29 33 37 32 5 1 - 58 0 0 29 42 24 8 2 39 56 161 -23 29 33 23 29 51 25 28 26 34 30 58 46 - 57 0 0 28 34 28 8 2 47 57 162 -23 28 25 24 28 43 31 27 18 16 29 51 12 - 56 0 0 27 25 18 8 2 55 59 163 -22 27 16 12 27 34 24 26 8 47 28 42 22 - 55 0 0 26 14 58 8 3 3 60 165 -21 26 5 51 26 24 7 24 58 10 27 32 21 - 54 0 0 25 3 33 8 3 12 62 166 -20 24 54 24 25 12 43 23 46 30 26 21 11 - 53 0 0 23 51 6 8 3 21 63 168 -19 23 41 55 24 0 18 22 33 51 25 8 57 - 52 0 0 22 37 43 8 3 29 64 170 -19 22 28 31 22 46 56 21 20 18 23 55 43 - 51 0 0 21 23 28 8 3 39 66 172 -18 21 14 15 21 32 42 20 5 56 22 41 36 - 50 0 0 20 8 27 8 3 48 67 174 -17 19 59 14 20 17 41 18 50 50 21 26 40 - 49 0 0 18 52 47 8 3 57 68 176 -16 18 43 33 19 2 1 17 35 8 20 11 1 - 48 0 0 17 36 32 8 4 7 70 179 -15 17 27 18 17 45 46 16 18 54 18 54 46 - 47 0 0 16 19 50 8 4 17 71 182 -14 16 10 36 16 29 3 15 2 16 17 38 0 - 46 0 0 15 2 46 8 4 27 72 186 -13 14 53 34 15 11 59 13 45 19 16 20 50 - 45 0 0 13 45 29 8 4 37 73 190 -12 13 36 17 13 54 41 12 28 11 15 3 23 - 44 0 0 12 28 4 8 4 47 74 195 -11 12 18 54 12 37 14 11 10 58 13 45 46 - 43 0 0 11 10 38 8 4 57 75 200 -10 11 1 29 11 19 46 9 53 46 12 28 5 - 42 0 0 9 53 17 8 5 7 76 206 -9 9 44 11 10 2 24 8 36 43 11 10 27 - 41 0 0 8 36 10 8 5 17 77 212 -7 8 27 6 8 45 14 7 19 55 9 53 0 - 40 0 0 7 19 21 8 5 28 77 219 -6 7 10 20 7 28 23 6 3 28 8 35 49 - 39 0 0 6 2 57 8 5 38 77 226 -5 5 53 59 6 11 56 4 47 29 7 19 1 - 38 0 0 4 47 5 8 5 48 77 234 -4 4 38 10 4 56 1 3 32 3 6 2 43 - 37 0 0 3 31 50 8 5 58 77 241 -3 3 22 58 3 40 43 2 17 15 4 46 59 - 36 0 0 2 17 18 8 6 9 77 248 -2 2 8 29 2 26 7 1 3 13 3 31 57 - 35 0 0 1 3 33 8 6 19 76 254 -1 0 54 49 1 12 18 - 0 10 1 2 17 41 Uncertainty in time = +/- 5 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 4772-00447-1 * constellation : Orion * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 45 18.4711 DE: -02 44 57.307 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .018, .018 ) * V mag [mag]: 9.5 * B mag [mag]: 10.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2696) Magion approx. diameter [km]: 20 approx. diameter ["]: .015 distance from Earth [AU]: 1.79300 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 545 number of rejected observations: 12 time covered by the observations: 1951 Sep 30 - 2007 Jul 15 1 sigma uncertainty ellipse (major, minor, PA): 0.059, 0.042, 90° remarks: * orbital elements for (2696) Magion : Mean anomaly = 320.74253122 deg Arg. of pericenter = 283.57072798 deg Long. of node = 186.29082486 deg Inclination = 25.34834079 deg Eccentricity = 0.11356334 Semimajor axis = 2.45001177 AU Perihelion dist = 2.17178026 AU Mag: H = 12.06, G = 0.15 Epoch of elements : MJD 55108.33700000 TDT (2009 Oct 04.337) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Oct 4 2696 Magion 8h 5.7m UT 9.5 5 45 18.471- 2 44 57.31TYC 4772-00447-1 10.0 16.2 20 1.1 1.793 2.096 -37.70 -48.2570 -2.739 55.75 -4.45 8.0955 0.16768 0.13917 6.40506 -7.68520 -0.00528 0.00048 2000 318.5998302009 926.00000283.570728186.290825 25.3483410.11356334 2.4500118 2.171780312.0 5.00.15 RATE 2.5701100 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.062 0.046 90 4.72 0.057 0 54581.5020091004_0447-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 08:47 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org