IOTA/IOTA-ES occultation update for (896) Sphinx / TYC 0583-00519-1 event on 2008 Jul 10, 03:18 UT Visible from Brazil Summary ------- On 2008 Jul 10 UT, the 13 km diameter asteroid (896) Sphinx will occult a 10.0 mag star in the constellation Pisces for observers along a path across Brazil. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.4 mag to 15.4 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: 23 * date and approx. time of event: 2008 Jul 10, 03:05 - 2008 Jul 10, 03:29 UT * midpoint of event [JD]: 2454657.63777083 * magnitude of target star: 10.0 * magnitude drop [mag]: 5.4 * estimated maximum duration [s]: 2.1 * Moon: 49 % sunlit, 154° distance * Sun: 116° distance * rough path description: Brazil The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 2.97 * 1 sigma uncertainty interval [seconds]: +/- 5.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .039 +/- .029) * 1 sigma uncertainty ellipse (major, minor, PA): ( .040", .028", 76° ) * approx speed of asteroid's shadow [km/s]: 6.1919 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0583-00519-1 by 896 Sphinx on 2008 Jul 10 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude - 63 27 19 -22 50 18 3 5 36 9 78 -73 - 63 43 7 -22 50 38 - 63 11 55 -22 50 0 - 65 27 4 -22 54 0 - 61 47 8 -22 49 7 - 59 19 3 -21 12 49 3 5 55 14 77 -77 - 59 30 9 -21 12 34 - 59 8 4 -21 13 5 - 60 39 10 -21 11 29 - 58 5 25 -21 15 0 - 56 20 1 -19 44 49 3 6 15 17 76 -79 - 56 29 13 -19 44 20 - 56 10 54 -19 45 19 - 57 25 28 -19 41 40 - 55 18 8 -19 48 29 - 53 56 6 -18 21 55 3 6 35 19 75 -81 - 54 4 13 -18 21 18 - 53 48 3 -18 22 33 - 54 53 27 -18 17 45 - 53 1 9 -18 26 26 - 51 54 30 -17 2 25 3 6 54 22 75 -82 - 52 1 54 -17 1 42 - 51 47 9 -17 3 8 - 52 46 34 -16 57 36 - 51 4 12 -17 7 29 - 50 8 43 -15 45 25 3 7 14 24 75 -82 - 50 15 35 -15 44 38 - 50 1 52 -15 46 11 - 50 57 2 -15 40 8 - 49 21 46 -15 50 53 - 48 34 52 -14 30 23 3 7 34 25 75 -82 - 48 41 21 -14 29 34 - 48 28 24 -14 31 13 - 49 20 23 -14 24 47 - 47 50 29 -14 36 10 - 47 10 28 -13 16 59 3 7 53 27 75 -81 - 47 16 39 -13 16 8 - 47 4 18 -13 17 50 - 47 53 47 -13 11 7 - 46 28 7 -13 23 0 - 45 53 46 -12 4 56 3 8 13 29 75 -80 - 45 59 42 -12 4 3 - 45 47 51 -12 5 49 - 46 35 20 -11 58 52 - 45 13 3 -12 11 8 - 44 43 30 -10 54 3 3 8 33 30 75 -79 - 44 49 14 -10 53 8 - 44 37 47 -10 54 57 - 45 23 37 -10 47 48 - 44 4 8 -11 0 24 - 43 38 43 - 9 44 10 3 8 52 32 75 -77 - 43 44 17 - 9 43 15 - 43 33 10 - 9 45 6 - 44 17 37 - 9 37 47 - 43 0 29 - 9 50 39 - 42 38 39 - 8 35 11 3 9 12 33 76 -76 - 42 44 5 - 8 34 14 - 42 33 15 - 8 36 7 - 43 16 32 - 8 28 41 - 42 1 23 - 8 41 47 - 41 42 44 - 7 26 58 3 9 32 34 76 -75 - 41 48 2 - 7 26 1 - 41 37 26 - 7 27 56 - 42 19 44 - 7 20 22 - 41 6 16 - 7 33 40 - 40 50 27 - 6 19 27 3 9 51 35 77 -73 - 40 55 39 - 6 18 29 - 40 45 16 - 6 20 26 - 41 26 43 - 6 12 46 - 40 14 42 - 6 26 14 - 40 1 27 - 5 12 34 3 10 11 37 77 -72 - 40 6 33 - 5 11 35 - 39 56 21 - 5 13 33 - 40 37 4 - 5 5 48 - 39 26 18 - 5 19 25 - 39 15 22 - 4 6 14 3 10 31 38 78 -71 - 39 20 23 - 4 5 14 - 39 10 21 - 4 7 13 - 39 50 25 - 3 59 23 - 38 40 46 - 4 13 9 - 38 31 56 - 3 0 24 3 10 51 39 78 -69 - 38 36 53 - 2 59 24 - 38 26 59 - 3 1 24 - 39 6 30 - 2 53 29 - 37 57 48 - 3 7 23 - 37 50 55 - 1 55 0 3 11 10 40 79 -68 - 37 55 49 - 1 54 0 - 37 46 2 - 1 56 1 - 38 25 4 - 1 48 2 - 37 17 11 - 2 2 2 - 37 12 7 - 0 50 0 3 11 30 41 80 -67 - 37 16 58 - 0 48 59 - 37 7 17 - 0 51 1 - 37 45 53 - 0 42 59 - 36 38 44 - 0 57 6 - 36 35 21 0 14 38 3 11 50 41 81 -66 - 36 40 9 0 15 39 - 36 30 34 0 13 36 - 37 8 48 0 21 43 - 36 2 17 0 7 29 - 36 0 28 1 18 57 3 12 9 42 82 -64 - 36 5 14 1 19 59 - 35 55 43 1 17 55 - 36 33 39 1 26 5 - 35 27 39 1 11 46 - 35 27 20 2 23 0 3 12 29 43 82 -63 - 35 32 4 2 24 2 - 35 22 37 2 21 58 - 36 0 17 2 30 11 - 34 54 45 2 15 46 - 34 55 50 3 26 48 3 12 49 44 83 -62 - 35 0 32 3 27 51 - 34 51 9 3 25 45 - 35 28 34 3 34 2 - 34 23 26 3 19 31 - 34 25 52 4 30 24 3 13 8 44 84 -61 - 34 30 32 4 31 27 - 34 21 12 4 29 21 - 34 58 26 4 37 40 - 33 53 38 4 23 4 - 33 57 19 5 33 48 3 13 28 45 85 -59 - 34 1 58 5 34 52 - 33 52 41 5 32 45 - 34 29 45 5 41 7 - 33 25 13 5 26 26 - 33 30 8 6 37 4 3 13 48 46 86 -58 - 33 34 46 6 38 8 - 33 25 30 6 36 0 - 34 2 28 6 44 25 - 32 58 8 6 29 39 - 33 4 14 7 40 12 3 14 7 46 88 -57 - 33 8 52 7 41 16 - 32 59 37 7 39 8 - 33 36 29 7 47 36 - 32 32 19 7 32 45 - 32 39 33 8 43 14 3 14 27 47 89 -56 - 32 44 10 8 44 19 - 32 34 56 8 42 10 - 33 11 44 8 50 41 - 32 7 41 8 35 45 - 32 16 1 9 46 13 3 14 47 47 90 -55 - 32 20 38 9 47 18 - 32 11 25 9 45 8 - 32 48 10 9 53 42 - 31 44 11 9 38 41 - 31 53 36 10 49 9 3 15 7 48 91 -54 - 31 58 13 10 50 14 - 31 49 0 10 48 3 - 32 25 45 10 56 40 - 31 21 46 10 41 34 - 31 32 15 11 52 3 3 15 26 48 92 -53 - 31 36 52 11 53 9 - 31 27 39 11 50 58 - 32 4 25 11 59 38 - 31 0 24 11 44 26 - 31 11 55 12 54 59 3 15 46 48 94 -51 - 31 16 33 12 56 5 - 31 7 19 12 53 53 - 31 44 7 13 2 36 - 30 40 2 12 47 19 - 30 52 35 13 57 56 3 16 6 49 95 -50 - 30 57 13 13 59 2 - 30 47 58 13 56 49 - 31 24 50 14 5 36 - 30 20 38 13 50 13 - 30 34 12 15 0 56 3 16 25 49 96 -49 - 30 38 51 15 2 3 - 30 29 34 14 59 50 - 31 6 33 15 8 39 - 30 2 11 14 53 11 - 30 16 46 16 4 2 3 16 45 49 98 -48 - 30 21 25 16 5 9 - 30 12 7 16 2 55 - 30 49 12 16 11 48 - 29 44 38 15 56 14 - 30 0 14 17 7 14 3 17 5 49 99 -47 - 30 4 54 17 8 21 - 29 55 34 17 6 6 - 30 32 47 17 15 2 - 29 27 58 16 59 22 - 29 44 35 18 10 34 3 17 24 50 100 -46 - 29 49 17 18 11 42 - 29 39 54 18 9 25 - 30 17 18 18 18 25 - 29 12 11 18 2 39 - 29 29 50 19 14 3 3 17 44 50 102 -45 - 29 34 33 19 15 11 - 29 25 7 19 12 54 - 30 2 42 19 21 57 - 28 57 16 19 6 5 - 29 15 56 20 17 43 3 18 4 50 103 -44 - 29 20 41 20 18 52 - 29 11 12 20 16 34 - 29 49 0 20 25 41 - 28 43 11 20 9 42 - 29 2 54 21 21 35 3 18 23 50 105 -43 - 29 7 41 21 22 45 - 28 58 8 21 20 26 - 29 36 11 21 29 37 - 28 29 56 21 13 31 - 28 50 44 22 25 42 3 18 43 50 106 -42 - 28 55 32 22 26 52 - 28 45 56 22 24 32 - 29 24 15 22 33 47 - 28 17 32 22 17 34 - 28 39 25 23 30 4 3 19 3 50 107 -41 - 28 44 16 23 31 15 - 28 34 35 23 28 54 - 29 13 13 23 38 13 - 28 5 57 23 21 53 - 28 28 58 24 34 44 3 19 22 49 109 -39 - 28 33 52 24 35 55 - 28 24 5 24 33 33 - 29 3 3 24 42 56 - 27 55 13 24 26 29 - 28 19 24 25 39 43 3 19 42 49 110 -38 - 28 24 20 25 40 54 - 28 14 28 25 38 31 - 28 53 48 25 47 59 - 27 45 20 25 31 24 - 28 10 42 26 45 3 3 20 2 49 111 -37 - 28 15 42 26 46 15 - 28 5 44 26 43 50 - 28 45 28 26 53 23 - 27 36 18 26 36 40 - 28 2 55 27 50 45 3 20 22 49 113 -36 - 28 7 58 27 51 58 - 27 57 53 27 49 32 - 28 38 4 27 59 10 - 27 28 9 27 42 18 - 27 56 4 28 56 53 3 20 41 49 114 -35 - 28 1 10 28 58 6 - 27 50 59 28 55 39 - 28 31 38 29 5 22 - 27 20 53 28 48 21 - 27 50 10 30 3 27 3 21 1 48 115 -34 - 27 55 20 30 4 41 - 27 45 1 30 2 13 - 28 26 11 30 12 1 - 27 14 33 29 54 51 - 27 45 16 31 10 31 3 21 21 48 117 -33 - 27 50 30 31 11 46 - 27 40 2 31 9 16 - 28 21 46 31 19 9 - 27 9 10 31 1 50 - 27 41 24 32 18 6 3 21 40 48 118 -32 - 27 46 42 32 19 21 - 27 36 5 32 16 50 - 28 18 25 32 26 49 - 27 4 46 32 9 20 - 27 38 36 33 26 14 3 22 0 47 119 -31 - 27 44 0 33 27 31 - 27 33 13 33 24 58 - 28 16 13 33 35 3 - 27 1 25 33 17 23 - 27 36 58 34 34 59 3 22 20 47 120 -30 - 27 42 27 34 36 17 - 27 31 29 34 33 42 - 28 15 12 34 43 53 - 26 59 10 34 26 3 - 27 36 32 35 44 24 3 22 39 46 121 -29 - 27 42 7 35 45 42 - 27 30 58 35 43 6 - 28 15 27 35 53 23 - 26 58 4 35 35 21 - 27 37 24 36 54 30 3 22 59 45 123 -28 - 27 43 5 36 55 49 - 27 31 43 36 53 11 - 28 17 4 37 3 36 - 26 58 13 36 45 21 - 27 39 39 38 5 22 3 23 19 45 124 -26 - 27 45 27 38 6 41 - 27 33 52 38 4 2 - 28 20 8 38 14 33 - 26 59 41 37 56 7 - 27 43 25 39 17 2 3 23 38 44 125 -25 - 27 49 20 39 18 23 - 27 37 30 39 15 41 - 28 24 46 39 26 20 - 27 2 35 39 7 40 - 27 48 48 40 29 34 3 23 58 43 126 -24 - 27 54 52 40 30 56 - 27 42 45 40 28 13 - 28 31 8 40 39 0 - 27 7 2 40 20 6 - 27 56 0 41 43 3 3 24 18 43 126 -23 - 28 2 13 41 44 26 - 27 49 48 41 41 41 - 28 39 23 41 52 36 - 27 13 12 41 33 27 - 28 5 10 42 57 33 3 24 37 42 127 -22 - 28 11 33 42 58 57 - 27 58 47 42 56 9 - 28 49 44 43 7 13 - 27 21 14 42 47 49 - 28 16 31 44 13 8 3 24 57 41 128 -21 - 28 23 5 44 14 33 - 28 9 58 44 11 43 - 29 2 23 44 22 56 - 27 31 20 44 3 16 - 28 30 20 45 29 54 3 25 17 40 129 -20 - 28 37 7 45 31 20 - 28 23 35 45 28 27 - 29 17 38 45 39 50 - 27 43 46 45 19 53 - 28 46 56 46 47 55 3 25 37 39 129 -19 - 28 53 56 46 49 23 - 28 39 57 46 46 28 - 29 35 50 46 58 1 - 27 58 49 46 37 46 - 29 6 41 48 7 20 3 25 56 38 130 -17 - 29 13 56 48 8 49 - 28 59 27 48 5 51 - 29 57 22 48 17 35 - 28 16 51 47 57 1 - 29 30 3 49 28 14 3 26 16 37 130 -16 - 29 37 35 49 29 44 - 29 22 32 49 26 43 - 30 22 45 49 38 38 - 28 38 17 49 17 45 - 29 57 37 50 50 45 3 26 36 36 131 -15 - 30 5 29 50 52 17 - 29 49 47 50 49 13 - 30 52 37 51 1 19 - 29 3 39 50 40 5 - 30 30 6 52 15 2 3 26 55 35 131 -14 - 30 38 20 52 16 35 - 30 21 54 52 13 28 - 31 27 43 52 25 47 - 29 33 38 52 4 11 - 31 8 25 53 41 14 3 27 15 34 131 -12 - 31 17 4 53 42 49 - 30 59 47 53 39 39 - 32 9 3 53 52 10 - 30 9 3 53 30 13 - 31 53 42 55 9 33 3 27 35 33 131 -11 - 32 2 52 55 11 10 - 31 44 35 55 7 56 - 32 57 52 55 20 39 - 30 51 0 54 58 20 - 32 47 30 56 40 10 3 27 54 31 131 -10 - 32 57 15 56 41 48 - 32 37 48 56 38 32 - 33 55 49 56 51 27 - 31 40 51 56 28 45 - 33 51 49 58 13 19 3 28 14 30 131 -9 - 34 2 15 58 14 58 - 33 41 25 58 11 39 - 35 5 6 58 24 46 - 32 40 28 58 1 42 - 35 9 23 59 49 13 3 28 34 28 130 -7 - 35 20 40 59 50 54 - 34 58 8 59 47 32 - 36 28 44 60 0 50 - 33 52 20 59 37 26 - 36 44 0 61 28 10 3 28 53 27 129 -6 - 36 56 20 61 29 52 - 36 31 43 61 26 27 - 38 10 52 61 39 53 - 35 19 54 61 16 13 - 38 41 8 63 10 24 3 29 13 25 128 -4 - 38 54 49 63 12 6 - 38 27 31 63 8 41 - 40 17 37 63 22 8 - 37 8 6 62 58 21 - 41 8 57 64 56 8 3 29 33 23 126 -3 - 41 24 23 64 57 50 - 40 53 36 64 54 25 - 42 58 4 65 7 45 - 39 24 14 64 44 7 - 44 20 11 66 45 27 3 29 53 21 124 -1 - 44 38 1 66 47 6 - 44 2 27 66 43 48 - 46 26 39 66 56 40 - 42 19 38 66 33 41 Uncertainty in time = +/- 7 secs [Prediction of 2008 Jun 6.0] Data for the target star ------------------------ * name: TYC 0583-00519-1 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 23 11 48.2954 DE: +07 06 36.532 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .019 ) * V mag [mag]: 10.0 * B mag [mag]: 10.3 * Apparent position with proper motion RA(deg): 348.0645528863 DE(deg): 7.1575041560 * Equation of equinoxes (radians) : 0.000051048197253 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (896) Sphinx approx. diameter [km]: 13 approx. diameter ["]: .012 distance from Earth [AU]: 1.45500 * orbital information: orbit source: Preston date of fit: 2008 Jun 04 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 902 number of rejected observations: 38 time covered by the observations: 1918 Oct 09 - 2007 May 11 1 sigma uncertainty ellipse (major, minor, PA): 0.034, 0.021, 70° remarks: * orbital elements for (896) Sphinx : Mean anomaly = 53.44760840 deg Arg. of pericenter = 1.40280070 deg Long. of node = 254.25822910 deg Inclination = 8.19019349 deg Eccentricity = 0.16420408 Semimajor axis = 2.28501863 AU Perihelion dist = 1.90980926 AU Mag: H = 11.60, G = 0.15 Epoch of elements : MJD 54657.13800000 TDT (2008 Jul 10.138) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jul 10 896 Sphinx 3h 18.4m UT 10.0 23 11 48.295 7 6 36.53TYC 0583-00519-1 10.3 15.4 13 2.1 1.455 0.588 19.20 9.9275 7.105 131.75 22.20 3.3065 -0.58748 0.26902 1.45193 3.17898 -0.00406 -0.00225 2000 51.4108192008 7 3.00000 1.402801254.258229 8.1901930.16420408 2.2850186 1.909809211.8 5.00.15 RATE 2.8534450 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.040 0.028 76 3.97 0.036 0 54623.5020080710_0519-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jun 06, 22:31 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org