IOTA/IOTA-ES occultation update for (2696) Magion / TYC 1650-01085-1 event on 2008 Jul 10, 19:30 UT Visible from Philippines, SE Asia, India, Africa Summary ------- On 2008 Jul 10 UT, the 20 km diameter asteroid (2696) Magion will occult a 10.2 mag star in the constellation Pegasus for observers along a path across Philippines, SE Asia, India, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.2 mag to 16.4 mag (the magnitude of the asteroid) for at most 2.6 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: 13 * date and approx. time of event: 2008 Jul 10, 19:19 - 2008 Jul 10, 19:43 UT * magnitude of target star: 10.2 * magnitude drop [mag]: 6.2 * estimated maximum duration [s]: 2.6 * Moon: 56 % sunlit, 119° distance * Sun: 133° distance * rough path description: Philippines, SE Asia, India, Africa The occultation path -------------------- * approximate projected width [km]: 20 * 1 sigma uncertainty interval [path widths]: +/- 5.01 * 1 sigma uncertainty interval [seconds]: +/- 15.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .089 +/- .070) * 1 sigma uncertainty ellipse (major, minor, PA): ( .089", .070", 90° ) * approx speed of asteroid's shadow [km/s]: 7.7631 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1650-01085-1 by 2696 Magion on 2008 Jul 10 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 3 0 0 3 57 17 19 43 57 0 74 -24 4 2 56 3 51 38 4 59 33 .. .. .. 4 0 0 4 14 38 19 43 57 1 74 -25 4 20 17 4 8 59 5 16 54 3 12 25 5 0 0 4 31 56 19 43 57 2 74 -25 4 37 35 4 26 17 5 34 11 3 29 43 6 0 0 4 49 10 19 43 56 3 74 -26 4 54 48 4 43 31 5 51 23 3 46 58 7 0 0 5 6 19 19 43 55 4 74 -27 5 11 58 5 0 41 6 8 32 4 4 9 8 0 0 5 23 24 19 43 54 5 74 -28 5 29 3 5 17 46 6 25 35 4 21 15 9 0 0 5 40 24 19 43 52 6 74 -28 5 46 2 5 34 46 6 42 34 4 38 16 10 0 0 5 57 19 19 43 51 7 75 -29 6 2 57 5 51 41 6 59 27 4 55 12 11 0 0 6 14 8 19 43 49 8 75 -30 6 19 46 6 8 30 7 16 15 5 12 2 12 0 0 6 30 51 19 43 46 9 75 -30 6 36 29 6 25 13 7 32 57 5 28 47 13 0 0 6 47 28 19 43 44 10 75 -31 6 53 6 6 41 50 7 49 32 5 45 26 14 0 0 7 3 59 19 43 41 11 75 -32 7 9 36 6 58 21 8 6 1 6 1 58 15 0 0 7 20 22 19 43 38 12 75 -32 7 26 0 7 14 45 8 22 23 6 18 23 16 0 0 7 36 39 19 43 35 13 75 -33 7 42 16 7 31 1 8 38 38 6 34 42 17 0 0 7 52 48 19 43 31 14 75 -34 7 58 25 7 47 11 8 54 45 6 50 53 18 0 0 8 8 50 19 43 27 16 75 -35 8 14 27 8 3 12 9 10 45 7 6 56 19 0 0 8 24 43 19 43 23 17 76 -35 8 30 20 8 19 6 9 26 37 7 22 51 20 0 0 8 40 28 19 43 19 18 76 -36 8 46 5 8 34 52 9 42 20 7 38 39 21 0 0 8 56 5 19 43 15 19 76 -36 9 1 42 8 50 29 9 57 55 7 54 18 22 0 0 9 11 34 19 43 10 20 76 -37 9 17 10 9 5 57 10 13 21 8 9 48 23 0 0 9 26 53 19 43 5 21 76 -38 9 32 29 9 21 17 10 28 38 8 25 9 24 0 0 9 42 3 19 43 0 22 76 -38 9 47 39 9 36 27 10 43 46 8 40 21 25 0 0 9 57 3 19 42 55 23 77 -39 10 2 39 9 51 28 10 58 44 8 55 24 26 0 0 10 11 54 19 42 49 24 77 -39 10 17 30 10 6 19 11 13 33 9 10 17 27 0 0 10 26 35 19 42 43 25 77 -40 10 32 10 10 21 0 11 28 11 9 25 1 28 0 0 10 41 6 19 42 37 25 77 -41 10 46 41 10 35 31 11 42 40 9 39 34 29 0 0 10 55 26 19 42 31 26 77 -41 11 1 1 10 49 52 11 56 58 9 53 57 30 0 0 11 9 36 19 42 25 27 78 -42 11 15 11 11 4 2 12 11 6 10 8 9 31 0 0 11 23 36 19 42 18 28 78 -42 11 29 10 11 18 1 12 25 3 10 22 11 32 0 0 11 37 24 19 42 11 29 78 -43 11 42 58 11 31 50 12 38 49 10 36 1 33 0 0 11 51 1 19 42 4 30 78 -43 11 56 35 11 45 27 12 52 24 10 49 41 34 0 0 12 4 27 19 41 57 31 78 -44 12 10 1 11 58 54 13 5 47 11 3 10 35 0 0 12 17 42 19 41 50 32 79 -44 12 23 16 12 12 8 13 18 59 11 16 27 36 0 0 12 30 45 19 41 42 33 79 -45 12 36 18 12 25 11 13 32 0 11 29 32 37 0 0 12 43 36 19 41 34 34 79 -45 12 49 9 12 38 3 13 44 48 11 42 25 38 0 0 12 56 15 19 41 27 35 79 -46 13 1 48 12 50 42 13 57 25 11 55 7 39 0 0 13 8 42 19 41 18 36 80 -46 13 14 15 13 3 10 14 9 50 12 7 37 40 0 0 13 20 57 19 41 10 37 80 -46 13 26 30 13 15 25 14 22 2 12 19 54 41 0 0 13 33 0 19 41 2 38 80 -47 13 38 32 13 27 27 14 34 2 12 31 59 42 0 0 13 44 50 19 40 53 39 80 -47 13 50 22 13 39 18 14 45 50 12 43 51 43 0 0 13 56 27 19 40 45 40 81 -47 14 1 59 13 50 55 14 57 25 12 55 31 44 0 0 14 7 52 19 40 36 41 81 -48 14 13 23 14 2 20 15 8 47 13 6 58 45 0 0 14 19 3 19 40 27 42 81 -48 14 24 35 14 13 32 15 19 56 13 18 12 46 0 0 14 30 2 19 40 17 43 81 -48 14 35 33 14 24 31 15 30 53 13 29 13 47 0 0 14 40 48 19 40 8 44 82 -49 14 46 19 14 35 17 15 41 36 13 40 1 48 0 0 14 51 20 19 39 59 45 82 -49 14 56 51 14 45 49 15 52 6 13 50 36 49 0 0 15 1 39 19 39 49 46 82 -49 15 7 10 14 56 9 16 2 23 14 0 57 50 0 0 15 11 45 19 39 39 47 82 -49 15 17 15 15 6 14 16 12 26 14 11 5 51 0 0 15 21 37 19 39 29 48 83 -50 15 27 7 15 16 7 16 22 16 14 21 0 52 0 0 15 31 15 19 39 19 49 83 -50 15 36 45 15 25 45 16 31 52 14 30 41 53 0 0 15 40 40 19 39 9 49 83 -50 15 46 10 15 35 10 16 41 15 14 40 8 54 0 0 15 49 51 19 38 59 50 84 -50 15 55 21 15 44 22 16 50 24 14 49 21 55 0 0 15 58 48 19 38 49 51 84 -50 16 4 18 15 53 19 16 59 19 14 58 20 56 0 0 16 7 32 19 38 38 52 84 -50 16 13 1 16 2 3 17 8 0 15 7 5 57 0 0 16 16 1 19 38 27 53 85 -51 16 21 30 16 10 32 17 16 27 15 15 37 58 0 0 16 24 16 19 38 17 54 85 -51 16 29 45 16 18 47 17 24 41 15 23 54 59 0 0 16 32 17 19 38 6 55 85 -51 16 37 46 16 26 49 17 32 40 15 31 57 60 0 0 16 40 4 19 37 55 56 86 -51 16 45 33 16 34 36 17 40 25 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43 16 26 51 14 25 38 132 0 0 15 16 31 19 23 8 58 276 -19 15 22 1 15 11 1 16 17 11 14 15 54 133 0 0 15 6 36 19 22 57 57 276 -19 15 12 7 15 1 6 16 7 18 14 5 56 134 0 0 14 56 28 19 22 45 57 277 -18 15 1 58 14 50 57 15 57 12 13 55 46 135 0 0 14 46 6 19 22 34 56 277 -17 14 51 37 14 40 36 15 46 53 13 45 22 136 0 0 14 35 32 19 22 23 55 277 -16 14 41 3 14 30 1 15 36 21 13 34 45 137 0 0 14 24 45 19 22 12 54 278 -16 14 30 16 14 19 13 15 25 36 13 23 56 138 0 0 14 13 45 19 22 1 53 278 -15 14 19 16 14 8 13 15 14 38 13 12 53 139 0 0 14 2 32 19 21 51 52 278 -14 14 8 4 13 57 0 15 3 28 13 1 38 140 0 0 13 51 7 19 21 40 51 279 -13 13 56 38 13 45 35 14 52 5 12 50 11 141 0 0 13 39 29 19 21 29 50 279 -13 13 45 1 13 33 57 14 40 29 12 38 31 142 0 0 13 27 39 19 21 19 49 279 -12 13 33 11 13 22 7 14 28 42 12 26 38 143 0 0 13 15 37 19 21 9 48 279 -11 13 21 9 13 10 4 14 16 42 12 14 34 144 0 0 13 3 23 19 20 59 47 280 -10 13 8 55 12 57 50 14 4 30 12 2 17 145 0 0 12 50 57 19 20 49 46 280 -10 12 56 30 12 45 24 13 52 7 11 49 49 146 0 0 12 38 19 19 20 39 45 280 -9 12 43 52 12 32 46 13 39 31 11 37 9 147 0 0 12 25 30 19 20 29 44 280 -8 12 31 3 12 19 56 13 26 45 11 24 17 148 0 0 12 12 29 19 20 20 43 281 -7 12 18 3 12 6 56 13 13 46 11 11 14 149 0 0 11 59 17 19 20 10 42 281 -7 12 4 51 11 53 43 13 0 37 10 58 0 150 0 0 11 45 54 19 20 1 41 281 -6 11 51 28 11 40 20 12 47 16 10 44 35 151 0 0 11 32 20 19 19 52 40 281 -5 11 37 55 11 26 46 12 33 44 10 30 58 152 0 0 11 18 36 19 19 43 39 282 -4 11 24 10 11 13 1 12 20 2 10 17 11 153 0 0 11 4 41 19 19 34 38 282 -4 11 10 15 10 59 6 12 6 9 10 3 14 154 0 0 10 50 35 19 19 26 37 282 -3 10 56 10 10 45 0 11 52 6 9 49 6 155 0 0 10 36 19 19 19 17 36 282 -2 10 41 54 10 30 44 11 37 52 9 34 48 156 0 0 10 21 54 19 19 9 36 282 -1 10 27 29 10 16 19 11 23 29 9 20 21 157 0 0 10 7 18 19 19 1 35 283 0 10 12 54 10 1 43 11 8 56 9 5 43 Uncertainty in time = +/- 16 secs [Prediction of 2008 Jul 3.0] Data for the target star ------------------------ * name: TYC 1650-01085-1 * constellation : Pegasus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 15 51.4008 DE: +16 01 21.867 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .021 ) * V mag [mag]: 10.2 * B mag [mag]: 11.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2696) Magion approx. diameter [km]: 20 approx. diameter ["]: .014 distance from Earth [AU]: 1.91300 * orbital information: orbit source: Preston date of fit: 2008 Jul 02 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 577 number of rejected observations: 11 time covered by the observations: 1951 Sep 30 - 2008 May 26 1 sigma uncertainty ellipse (major, minor, PA): 0.087, 0.067, 90° remarks: * orbital elements for (2696) Magion : Mean anomaly = 205.13793541 deg Arg. of pericenter = 283.37432746 deg Long. of node = 186.30574749 deg Inclination = 25.33905694 deg Eccentricity = 0.11315248 Semimajor axis = 2.45099924 AU Perihelion dist = 2.17366259 AU Mag: H = 12.06, G = 0.15 Epoch of elements : MJD 54657.81300000 TDT (2008 Jul 10.813) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jul 10 2696 Magion 19h 30.3m UT 10.2 21 15 51.401 16 1 21.87TYC 1650-01085-1 11.1 16.4 20 2.6 1.913 -1.398 0.56 97.3045 16.023 -111.19 22.11 19.5045 0.00179 0.04214 -4.37991 0.12531 -0.00242 -0.00323 2000 203.1311212008 7 3.00000283.374327186.305747 25.3390570.11315248 2.4509992 2.173662612.0 5.00.15 RATE 2.5685580 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.089 0.070 90 6.01 0.072 0 54650.5020080710_1085-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jul 03, 00:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org