IOTA/IOTA-ES occultation update for (2393) Suzuki / TYC 5208-00983-1 event on 2012 Oct 06, 17:56 UT Visible from Europe, Arabia, Africa Summary ------- On 2012 Oct 06 UT, the 51 km diameter asteroid (2393) Suzuki will occult a 11.5 mag star in the constellation Aquarius for observers along a path across Europe, Arabia, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.4 mag to 14.8 mag (the magnitude of the asteroid) for at most 9.5 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: 49 * date and approx. time of event: 2012 Oct 06, 17:37 - 2012 Oct 06, 18:16 UT * geocentric midpoint of event [JD]: 2456207.2477875 * magnitude of target star: 11.5 * magnitude drop [mag]: 3.4 * estimated maximum duration [s]: 9.5 * Moon: 65 % sunlit, 120° distance * Sun: 131° distance * rough path description: Europe, Arabia, Africa The occultation path -------------------- * approximate projected width [km]: 51 * 1 sigma uncertainty interval [path widths]: +/- 1.33 * 1 sigma uncertainty interval [seconds]: +/- 16.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .050 +/- .067) * 1 sigma uncertainty ellipse (major, minor, PA): ( .067", .050", 355° ) * approx speed of asteroid's shadow [km/s]: 5.4016 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5208-00983-1 by 2393 Suzuki on 2012 Oct 6 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 - 14 47 59 76 0 0 17 37 21 7 121 -1 - 16 43 39 - 12 58 23 - 22 32 24 - 8 29 49 Latitude Latitude Latitude Latitude - 14 0 0 75 53 5 17 37 22 7 121 -1 75 37 4 76 9 7 74 54 28 76 51 46 - 13 0 0 75 44 3 17 37 23 7 122 -1 75 27 52 76 0 15 74 44 49 76 43 20 - 12 0 0 75 34 35 17 37 23 7 123 -2 75 18 13 75 50 57 74 34 43 76 34 30 - 11 0 0 75 24 39 17 37 24 8 124 -2 75 8 6 75 41 11 74 24 7 76 25 14 - 10 0 0 75 14 13 17 37 25 8 125 -2 74 57 29 75 30 58 74 13 0 76 15 31 - 9 0 0 75 3 18 17 37 26 8 126 -2 74 46 22 75 20 14 74 1 20 76 5 19 - 8 0 0 74 51 51 17 37 27 9 127 -3 74 34 42 75 8 59 73 49 7 75 54 38 - 7 0 0 74 39 50 17 37 28 9 128 -3 74 22 28 74 57 12 73 36 18 75 43 25 - 6 0 0 74 27 14 17 37 29 9 129 -3 74 9 39 74 44 50 73 22 52 75 31 40 - 5 0 0 74 14 1 17 37 30 10 130 -3 73 56 11 74 31 52 73 8 47 75 19 20 - 4 0 0 74 0 10 17 37 32 10 131 -3 73 42 5 74 18 15 72 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35 -69 19 46 -70 26 52 -68 41 24 107 0 0 -69 40 31 18 16 15 6 286 -13 -69 54 51 -69 26 11 -70 32 57 -68 48 2 108 0 0 -69 46 27 18 16 16 6 285 -13 -70 0 43 -69 32 11 -70 38 37 -68 54 13 109 0 0 -69 51 59 18 16 17 6 284 -13 -70 6 11 -69 37 47 -70 43 55 -68 59 59 110 0 0 -69 57 7 18 16 17 5 283 -12 -70 11 15 -69 42 58 -70 48 50 -69 5 20 111 0 0 -70 1 52 18 16 18 5 282 -12 -70 15 56 -69 47 47 -70 53 22 -69 10 17 112 0 0 -70 6 13 18 16 19 5 281 -12 -70 20 15 -69 52 11 -70 57 33 -69 14 50 113 0 0 -70 10 13 18 16 19 4 280 -12 -70 24 12 -69 56 14 -71 1 22 -69 19 0 114 0 0 -70 13 50 18 16 20 4 279 -12 -70 27 47 -69 59 54 -71 4 50 -69 22 47 115 0 0 -70 17 6 18 16 20 4 278 -11 -70 31 0 -70 3 12 -71 7 57 -69 26 11 116 0 0 -70 20 0 18 16 21 3 277 -11 -70 33 52 -70 6 8 -71 10 44 -69 29 13 117 0 0 -70 22 33 18 16 21 3 276 -11 -70 36 23 -70 8 42 -71 13 10 -69 31 52 118 0 0 -70 24 45 18 16 21 3 276 -11 -70 38 33 -70 10 56 -71 15 16 -69 34 10 119 0 0 -70 26 36 18 16 22 2 275 -10 -70 40 23 -70 12 48 -71 17 3 -69 36 6 120 0 0 -70 28 6 18 16 22 2 274 -10 -70 41 53 -70 14 20 -71 18 29 -69 37 40 121 0 0 -70 29 16 18 16 22 2 273 -10 -70 43 2 -70 15 31 -71 19 36 -69 38 53 122 0 0 -70 30 6 18 16 22 1 272 -10 -70 43 51 -70 16 21 -71 20 24 -69 39 45 123 0 0 -70 30 35 18 16 22 1 271 -9 -70 44 20 -70 16 51 -71 20 52 -69 40 16 124 0 0 -70 30 45 18 16 23 1 270 -9 -70 44 29 -70 17 0 -71 21 1 -69 40 26 125 0 0 -70 30 33 18 16 23 0 269 -9 -70 44 18 -70 16 49 -71 20 50 -69 40 14 Uncertainty in time = +/- 17 secs Prediction of 2012 Sep 27.0 Data for the target star ------------------------ * name: TYC 5208-00983-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 35 25.5103 DE: -00 40 18.557 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .033, .060 ) * V mag [mag]: 11.5 * B mag [mag]: 12.4 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2393) Suzuki approx. diameter [km]: 51 approx. diameter ["]: .038 distance from Earth [AU]: 1.85000 * orbital information: orbit source: Preston date of fit: 2012 Sep 26 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 960 number of rejected observations: 37 time covered by the observations: 1952 Jan 31 - 2012 Sep 22 1 sigma uncertainty ellipse (major, minor, PA): 0.038, 0.031, 66° remarks: * orbital elements for (2393) Suzuki : Mean anomaly = 4.71644575 deg Arg. of pericenter = 110.06881210 deg Long. of node = 225.09783876 deg Inclination = 10.24432198 deg Eccentricity = 0.18964358 Semimajor axis = 3.22549860 AU Perihelion dist = 2.61380350 AU Mag: H = 10.60, G = 0.15 Epoch of elements : MJD 56206.74800000 TDT (2012 Oct 06.748) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 6 2393 Suzuki 17h 56.8m UT 11.5 21 35 25.510- 0 40 18.56TYC 5208-00983-1 12.4 14.8 51 9.5 1.850 0.265 -13.93 38.8570 -0.668 -92.22 -5.48 17.9469 0.06244 0.01698 0.83336 -2.93271 0.00424 0.00057 2000 3.5683352012 930.00000110.068812225.097839 10.2443220.18964358 3.2254986 2.613803510.5 5.00.15 RATE 1.7014090 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.067 0.050 355 2.33 0.050 0 0 3 3 056197.0020121006_0983-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Sep 26, 22:03 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org