IOTA/IOTA-ES occultation update for (1036) Ganymed / TYC 5963-00726-1 event on 2008 Jan 02, 21:52 UT Visible from Indonesia, Africa Summary ------- On 2008 Jan 02 UT, the 32 km diameter asteroid (1036) Ganymed will occult a 10.9 mag star in the constellation Canis Major for observers along a path across Indonesia, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.6 mag to 13.4 mag (the magnitude of the asteroid) for at most 2.1 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: 62 * date and approx. time of event: 2008 Jan 02, 21:45 - 2008 Jan 02, 21:59 UT * magnitude of target star: 10.9 * magnitude drop [mag]: 2.6 * estimated maximum duration [s]: 2.1 * Moon: 27 % sunlit, 102° distance * Sun: 140° distance * rough path description: Indonesia, Africa Additional comments ------------------- 14" double star The occultation path -------------------- * approximate projected width [km]: 32 * 1 sigma uncertainty interval [path widths]: +/- 0.98 * 1 sigma uncertainty interval [seconds]: +/- 2.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .027 +/- .025) * 1 sigma uncertainty ellipse (major, minor, PA): ( .027", .024", 79° ) * approx speed of asteroid's shadow [km/s]: 14.9989 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5963-00726-1 by 1036 Ganymed on 2008 Jan 02 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 - 54 0 0 5 9 4 21 59 54 1 107 -7 5 18 11 4 59 58 5 36 2 4 42 7 - 53 0 0 4 50 58 21 59 54 2 107 -7 5 0 5 4 41 52 5 17 56 4 24 1 - 52 0 0 4 32 53 21 59 54 3 107 -8 4 41 59 4 23 46 4 59 51 4 5 56 - 51 0 0 4 14 48 21 59 54 4 107 -9 4 23 55 4 5 42 4 41 46 3 47 52 - 50 0 0 3 56 45 21 59 53 5 107 -10 4 5 52 3 47 39 4 23 43 3 29 49 - 49 0 0 3 38 44 21 59 52 6 107 -11 3 47 50 3 29 38 4 5 41 3 11 48 - 48 0 0 3 20 45 21 59 52 7 107 -11 3 29 51 3 11 39 3 47 42 2 53 49 - 47 0 0 3 2 49 21 59 51 8 107 -12 3 11 55 2 53 43 3 29 45 2 35 53 - 46 0 0 2 44 55 21 59 49 9 107 -13 2 54 1 2 35 49 3 11 51 2 18 0 - 45 0 0 2 27 5 21 59 48 10 107 -14 2 36 11 2 17 59 2 54 1 2 0 10 - 44 0 0 2 9 18 21 59 47 11 107 -15 2 18 24 2 0 13 2 36 13 1 42 24 - 43 0 0 1 51 36 21 59 45 12 107 -15 2 0 41 1 42 30 2 18 30 1 24 42 - 42 0 0 1 33 58 21 59 44 13 108 -16 1 43 3 1 24 52 2 0 52 1 7 5 - 41 0 0 1 16 24 21 59 42 14 108 -17 1 25 29 1 7 19 1 43 18 0 49 32 - 40 0 0 0 58 56 21 59 40 15 108 -18 1 8 1 0 49 51 1 25 49 0 32 4 - 39 0 0 0 41 33 21 59 38 16 108 -19 0 50 38 0 32 29 1 8 25 0 14 42 - 38 0 0 0 24 16 21 59 36 17 108 -19 0 33 20 0 15 12 0 51 8 - 0 2 34 - 37 0 0 0 7 5 21 59 33 18 108 -20 0 16 9 - 0 1 59 0 33 56 - 0 19 44 - 36 0 0 - 0 9 59 21 59 31 19 108 -21 - 0 0 55 - 0 19 3 0 16 51 - 0 36 48 - 35 0 0 - 0 26 56 21 59 28 20 108 -22 - 0 17 53 - 0 36 0 - 0 0 7 - 0 53 44 - 34 0 0 - 0 43 47 21 59 26 21 108 -22 - 0 34 44 - 0 52 50 - 0 16 59 - 1 10 34 - 33 0 0 - 1 0 30 21 59 23 22 108 -23 - 0 51 27 - 1 9 32 - 0 33 42 - 1 27 16 - 32 0 0 - 1 17 5 21 59 20 23 108 -24 - 1 8 2 - 1 26 7 - 0 50 18 - 1 43 50 - 31 0 0 - 1 33 31 21 59 17 24 108 -25 - 1 24 29 - 1 42 34 - 1 6 46 - 2 0 16 - 30 0 0 - 1 49 50 21 59 13 25 108 -26 - 1 40 48 - 1 58 52 - 1 23 5 - 2 16 33 - 29 0 0 - 2 6 0 21 59 10 26 108 -26 - 1 56 58 - 2 15 1 - 1 39 16 - 2 32 42 - 28 0 0 - 2 22 0 21 59 7 27 108 -27 - 2 12 59 - 2 31 2 - 1 55 18 - 2 48 42 - 27 0 0 - 2 37 52 21 59 3 28 108 -28 - 2 28 51 - 2 46 53 - 2 11 11 - 3 4 32 - 26 0 0 - 2 53 34 21 59 0 29 108 -29 - 2 44 33 - 3 2 34 - 2 26 53 - 3 20 13 - 25 0 0 - 3 9 6 21 58 56 30 108 -29 - 3 0 6 - 3 18 6 - 2 42 27 - 3 35 44 - 24 0 0 - 3 24 28 21 58 52 31 108 -30 - 3 15 28 - 3 33 27 - 2 57 50 - 3 51 5 - 23 0 0 - 3 39 39 21 58 48 32 107 -31 - 3 30 40 - 3 48 39 - 3 13 2 - 4 6 15 - 22 0 0 - 3 54 40 21 58 44 33 107 -32 - 3 45 41 - 4 3 39 - 3 28 4 - 4 21 15 - 21 0 0 - 4 9 30 21 58 40 34 107 -32 - 4 0 32 - 4 18 29 - 3 42 55 - 4 36 4 - 20 0 0 - 4 24 9 21 58 35 35 107 -33 - 4 15 11 - 4 33 7 - 3 57 36 - 4 50 42 - 19 0 0 - 4 38 37 21 58 31 36 107 -34 - 4 29 39 - 4 47 34 - 4 12 4 - 5 5 8 - 18 0 0 - 4 52 53 21 58 26 37 107 -34 - 4 43 55 - 5 1 50 - 4 26 21 - 5 19 23 - 17 0 0 - 5 6 57 21 58 22 38 107 -35 - 4 58 0 - 5 15 54 - 4 40 27 - 5 33 26 - 16 0 0 - 5 20 49 21 58 17 39 107 -36 - 5 11 52 - 5 29 45 - 4 54 20 - 5 47 17 - 15 0 0 - 5 34 29 21 58 12 40 107 -36 - 5 25 33 - 5 43 25 - 5 8 1 - 6 0 55 - 14 0 0 - 5 47 56 21 58 7 41 107 -37 - 5 39 0 - 5 56 52 - 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2 10 16 - 3 3 38 103 0 0 - 2 21 4 21 46 24 24 253 -19 - 2 12 3 - 2 30 5 - 1 54 21 - 2 47 46 104 0 0 - 2 5 1 21 46 21 23 253 -18 - 1 56 0 - 2 14 3 - 1 38 17 - 2 31 44 105 0 0 - 1 48 49 21 46 18 22 253 -17 - 1 39 47 - 1 57 51 - 1 22 5 - 2 15 33 106 0 0 - 1 32 29 21 46 15 21 253 -16 - 1 23 26 - 1 41 31 - 1 5 43 - 1 59 13 107 0 0 - 1 15 59 21 46 13 20 253 -16 - 1 6 57 - 1 25 2 - 0 49 13 - 1 42 45 108 0 0 - 0 59 22 21 46 10 19 253 -15 - 0 50 19 - 1 8 25 - 0 32 35 - 1 26 8 109 0 0 - 0 42 37 21 46 8 18 253 -14 - 0 33 34 - 0 51 40 - 0 15 49 - 1 9 24 110 0 0 - 0 25 44 21 46 5 17 253 -13 - 0 16 41 - 0 34 48 0 1 5 - 0 52 32 111 0 0 - 0 8 45 21 46 3 16 253 -12 0 0 19 - 0 17 48 0 18 6 - 0 35 34 112 0 0 0 8 22 21 46 1 15 253 -12 0 17 26 - 0 0 42 0 35 13 - 0 18 28 113 0 0 0 25 35 21 45 59 14 253 -11 0 34 39 0 16 31 0 52 27 - 0 1 15 114 0 0 0 42 54 21 45 58 13 253 -10 0 51 59 0 33 50 1 9 47 0 16 3 115 0 0 1 0 20 21 45 56 12 253 -9 1 9 24 0 51 15 1 27 13 0 33 28 116 0 0 1 17 50 21 45 54 11 253 -8 1 26 55 1 8 45 1 44 44 0 50 58 117 0 0 1 35 26 21 45 53 10 253 -8 1 44 31 1 26 21 2 2 20 1 8 33 118 0 0 1 53 6 21 45 52 8 253 -7 2 2 12 1 44 1 2 20 1 1 26 13 119 0 0 2 10 51 21 45 51 7 253 -6 2 19 57 2 1 46 2 37 47 1 43 57 120 0 0 2 28 40 21 45 50 6 253 -5 2 37 46 2 19 35 2 55 36 2 1 46 121 0 0 2 46 33 21 45 49 5 253 -4 2 55 39 2 37 27 3 13 29 2 19 38 122 0 0 3 4 29 21 45 48 4 253 -4 3 13 35 2 55 23 3 31 26 2 37 33 123 0 0 3 22 28 21 45 48 3 253 -3 3 31 34 3 13 21 3 49 25 2 55 32 124 0 0 3 40 29 21 45 48 2 253 -2 3 49 35 3 31 23 4 7 26 3 13 32 125 0 0 3 58 32 21 45 47 1 253 -1 4 7 39 3 49 26 4 25 30 3 31 36 126 0 0 4 16 37 21 45 47 0 253 0 4 25 44 4 7 31 4 43 36 3 49 41 Data for the target star ------------------------ * name: TYC 5963-00726-1 * constellation : Canis Major * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 02 47.0887 DE: -16 40 07.026 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .021 ) * V mag [mag]: 10.9 * B mag [mag]: 13.9 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1036) Ganymed approx. diameter [km]: 32 approx. diameter ["]: .025 distance from Earth [AU]: 1.77000 * orbital information: orbit source: Preston date of fit: 2007 Dec 18 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 2139 number of rejected observations: 126 time covered by the observations: 1924 Oct 23 - 2007 Dec 06 1 sigma uncertainty ellipse (major, minor, PA): 0.017, 0.013, 62° remarks: * orbital elements for (1036) Ganymed : Mean anomaly = 56.96255781 deg Arg. of pericenter = 132.46609312 deg Long. of node = 215.61498184 deg Inclination = 26.67164327 deg Eccentricity = 0.53364852 Semimajor axis = 2.66516129 AU Perihelion dist = 1.24290192 AU Mag: H = 9.28, G = 0.30 Epoch of elements : MJD 54467.91200000 TDT (2008 Jan 02.912) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jan 02 1036 Ganymed 21h 52.8m UT 10.9 7 2 47.089-16 40 7.03TYC 5963-00726-1 13.9 13.4 32 2.1 1.770 -2.927 0.40 35.570 -16.669 212.79 -22.91 21.8808 .00078 .08698 -8.46544 0.07553 -0.00030 0.00377 2000 55.170281120071226.00000132.466093215.614982 26.6716430.533648522.665161291.242901929.455 0.30 RATE 2.2652640 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.027 0.024 79.0 1.980 0.025 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Dec 19, 04:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org