IOTA/IOTA-ES occultation update for (398) Admete / TYC 0823-00676-1 event on 2012 Nov 28, 21:38 UT Visible from Arabia, Africa Summary ------- On 2012 Nov 28 UT, the 54 km diameter asteroid (398) Admete will occult a 10.3 mag star in the constellation Leo for observers along a path across Arabia, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.0 mag to 14.3 mag (the magnitude of the asteroid) for at most 5.1 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: 78 * date and approx. time of event: 2012 Nov 28, 21:29 - 2012 Nov 28, 21:42 UT * geocentric midpoint of event [JD]: 2456260.40150417 * magnitude of target star: 10.3 * magnitude drop [mag]: 4.0 * estimated maximum duration [s]: 5.1 * Moon: 100 % sunlit, 70° distance * Sun: 107° distance * rough path description: Arabia, Africa The occultation path -------------------- * approximate projected width [km]: 61 * 1 sigma uncertainty interval [path widths]: +/- 0.71 * 1 sigma uncertainty interval [seconds]: +/- 4.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .038 +/- .030) * 1 sigma uncertainty ellipse (major, minor, PA): ( .038", .029", 107° ) * approx speed of asteroid's shadow [km/s]: 10.5893 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0823-00676-1 by 398 Admete on 2012 Nov 28 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 Latitude Latitude Latitude Latitude 108 0 0 -29 45 12 21 42 45 49 360 0 -30 12 57 -29 17 37 -30 52 43 -28 38 46 107 0 0 -28 34 41 21 42 32 50 2 -2 -29 2 18 -28 7 16 -29 41 50 -27 28 38 106 0 0 -27 24 5 21 42 18 51 3 -3 -27 51 31 -26 56 49 -28 30 48 -26 18 25 105 0 0 -26 13 28 21 42 4 52 5 -4 -26 40 44 -25 46 23 -27 19 45 -25 8 14 104 0 0 -25 2 58 21 41 50 53 7 -6 -25 30 2 -24 36 4 -26 8 46 -23 58 10 103 0 0 -23 52 38 21 41 35 54 9 -7 -24 19 30 -23 25 57 -24 57 57 -22 48 20 102 0 0 -22 42 37 21 41 20 55 11 -9 -23 9 16 -22 16 8 -23 47 24 -21 38 48 101 0 0 -21 32 57 21 41 5 56 13 -10 -21 59 23 -21 6 41 -22 37 13 -20 29 40 100 0 0 -20 23 46 21 40 50 57 15 -11 -20 49 59 -19 57 44 -21 27 28 -19 21 1 99 0 0 -19 15 8 21 40 35 58 18 -13 -19 41 7 -18 49 20 -20 18 16 -18 12 56 98 0 0 -18 7 8 21 40 20 59 20 -14 -18 32 52 -17 41 34 -19 9 40 -17 5 30 97 0 0 -16 59 50 21 40 4 59 23 -16 -17 25 19 -16 34 30 -18 1 47 -15 58 46 96 0 0 -15 53 19 21 39 49 60 25 -17 -16 18 33 -15 28 13 -16 54 39 -14 52 50 95 0 0 -14 47 38 21 39 33 60 28 -19 -15 12 38 -14 22 47 -15 48 22 -13 47 45 94 0 0 -13 42 52 21 39 18 61 31 -20 -14 7 36 -13 18 16 -14 42 58 -12 43 34 93 0 0 -12 39 2 21 39 2 61 34 -21 -13 3 32 -12 14 41 -13 38 32 -11 40 20 92 0 0 -11 36 14 21 38 47 61 37 -23 -12 0 28 -11 12 8 -12 35 6 -10 38 7 91 0 0 -10 34 28 21 38 32 61 39 -24 -10 58 27 -10 10 37 -11 32 43 - 9 36 58 90 0 0 - 9 33 48 21 38 16 62 42 -26 - 9 57 31 - 9 10 12 -10 31 26 - 8 36 53 89 0 0 - 8 34 15 21 38 1 62 45 -27 - 8 57 44 - 8 10 54 - 9 31 17 - 7 37 56 88 0 0 - 7 35 52 21 37 46 61 48 -28 - 7 59 6 - 7 12 46 - 8 32 17 - 6 40 8 87 0 0 - 6 38 40 21 37 31 61 51 -30 - 7 1 39 - 6 15 48 - 7 34 29 - 5 43 31 86 0 0 - 5 42 40 21 37 17 61 53 -31 - 6 5 25 - 5 20 3 - 6 37 54 - 4 48 6 85 0 0 - 4 47 54 21 37 2 61 56 -33 - 5 10 24 - 4 25 31 - 5 42 33 - 3 53 53 84 0 0 - 3 54 22 21 36 48 60 58 -34 - 4 16 38 - 3 32 13 - 4 48 26 - 3 0 55 83 0 0 - 3 2 5 21 36 34 60 60 -35 - 3 24 8 - 2 40 9 - 3 55 36 - 2 9 11 82 0 0 - 2 11 4 21 36 20 59 63 -37 - 2 32 53 - 1 49 21 - 3 4 1 - 1 18 41 81 0 0 - 1 21 18 21 36 6 59 65 -38 - 1 42 54 - 0 59 49 - 2 13 43 - 0 29 27 80 0 0 - 0 32 49 21 35 52 58 67 -39 - 0 54 11 - 0 11 32 - 1 24 41 0 18 32 79 0 0 0 14 25 21 35 39 57 68 -41 - 0 6 44 0 35 29 - 0 36 56 1 5 15 78 0 0 1 0 23 21 35 26 57 70 -42 0 39 26 1 21 15 0 9 32 1 50 44 77 0 0 1 45 6 21 35 13 56 72 -43 1 24 21 2 5 46 0 54 44 2 34 58 76 0 0 2 28 33 21 35 1 55 73 -44 2 8 0 2 49 1 1 38 40 3 17 57 75 0 0 3 10 46 21 34 48 54 74 -46 2 50 24 3 31 3 2 21 21 3 59 42 74 0 0 3 51 44 21 34 36 54 76 -47 3 31 34 4 11 50 3 2 47 4 40 14 73 0 0 4 31 29 21 34 24 53 77 -48 4 11 29 4 51 24 3 42 58 5 19 33 72 0 0 5 10 1 21 34 13 52 78 -49 4 50 11 5 29 45 4 21 55 5 57 40 71 0 0 5 47 20 21 34 2 51 79 -51 5 27 41 6 6 54 4 59 39 6 34 35 70 0 0 6 23 28 21 33 51 50 79 -52 6 3 58 6 42 52 5 36 11 7 10 19 69 0 0 6 58 24 21 33 40 49 80 -53 6 39 5 7 17 40 6 11 31 7 44 53 68 0 0 7 32 11 21 33 29 48 81 -54 7 13 1 7 51 17 6 45 41 8 18 18 67 0 0 8 4 49 21 33 19 47 81 -55 7 45 48 8 23 46 7 18 40 8 50 35 66 0 0 8 36 18 21 33 9 46 82 -56 8 17 25 8 55 7 7 50 30 9 21 43 65 0 0 9 6 40 21 32 59 45 83 -58 8 47 55 9 25 20 8 21 12 9 51 45 64 0 0 9 35 55 21 32 49 44 83 -59 9 17 18 9 54 28 8 50 47 10 20 41 63 0 0 10 4 4 21 32 40 43 83 -60 9 45 35 10 22 29 9 19 14 10 48 32 62 0 0 10 31 8 21 32 31 42 84 -61 10 12 47 10 49 26 9 46 37 11 15 18 61 0 0 10 57 8 21 32 22 41 84 -62 10 38 54 11 15 19 10 12 54 11 41 1 60 0 0 11 22 4 21 32 14 40 84 -63 11 3 57 11 40 8 10 38 7 12 5 42 59 0 0 11 45 58 21 32 5 40 84 -64 11 27 57 12 3 56 11 2 17 12 29 20 58 0 0 12 8 51 21 31 57 39 85 -65 11 50 56 12 26 42 11 25 24 12 51 57 57 0 0 12 30 42 21 31 49 38 85 -66 12 12 53 12 48 27 11 47 30 13 13 34 56 0 0 12 51 33 21 31 42 37 85 -67 12 33 50 13 9 12 12 8 35 13 34 12 55 0 0 13 11 24 21 31 34 36 85 -68 12 53 47 13 28 58 12 28 39 13 53 50 54 0 0 13 30 17 21 31 27 35 85 -69 13 12 44 13 47 46 12 47 45 14 12 30 53 0 0 13 48 11 21 31 20 34 85 -70 13 30 44 14 5 36 13 5 51 14 30 13 52 0 0 14 5 8 21 31 13 33 85 -72 13 47 46 14 22 28 13 22 59 14 46 59 51 0 0 14 21 9 21 31 7 32 85 -73 14 3 50 14 38 24 13 39 10 15 2 49 50 0 0 14 36 13 21 31 0 31 85 -74 14 18 58 14 53 24 13 54 25 15 17 43 49 0 0 14 50 21 21 30 54 30 85 -74 14 33 11 15 7 29 14 8 43 15 31 43 48 0 0 15 3 35 21 30 48 29 85 -75 14 46 28 15 20 39 14 22 5 15 44 47 47 0 0 15 15 54 21 30 42 28 85 -76 14 58 51 15 32 54 14 34 32 15 56 58 46 0 0 15 27 19 21 30 37 27 85 -77 15 10 19 15 44 16 14 46 5 16 8 16 45 0 0 15 37 50 21 30 32 26 84 -78 15 20 53 15 54 45 14 56 44 16 18 40 44 0 0 15 47 29 21 30 27 25 84 -79 15 30 34 16 4 20 15 6 29 16 28 12 43 0 0 15 56 15 21 30 22 24 84 -80 15 39 23 16 13 4 15 15 21 16 36 52 42 0 0 16 4 8 21 30 17 23 84 -81 15 47 19 16 20 55 15 23 20 16 44 40 41 0 0 16 11 10 21 30 12 22 84 -82 15 54 23 16 27 55 15 30 27 16 51 37 40 0 0 16 17 20 21 30 8 21 83 -82 16 0 35 16 34 3 15 36 42 16 57 43 39 0 0 16 22 39 21 30 4 20 83 -83 16 5 55 16 39 21 15 42 5 17 2 58 38 0 0 16 27 8 21 30 0 19 83 -84 16 10 25 16 43 48 15 46 36 17 7 23 37 0 0 16 30 45 21 29 56 18 83 -84 16 14 4 16 47 24 15 50 17 17 10 58 36 0 0 16 33 32 21 29 53 17 83 -85 16 16 52 16 50 10 15 53 6 17 13 43 35 0 0 16 35 29 21 29 49 16 82 -85 16 18 49 16 52 6 15 55 5 17 15 38 34 0 0 16 36 36 21 29 46 15 82 -85 16 19 56 16 53 12 15 56 13 17 16 43 33 0 0 16 36 53 21 29 43 14 82 -85 16 20 14 16 53 29 15 56 31 17 16 59 32 0 0 16 36 20 21 29 40 13 82 -84 16 19 41 16 52 56 15 55 58 17 16 26 31 0 0 16 34 57 21 29 38 12 81 -84 16 18 18 16 51 33 15 54 35 17 15 4 30 0 0 16 32 45 21 29 35 12 81 -83 16 16 6 16 49 22 15 52 23 17 12 52 29 0 0 16 29 43 21 29 33 11 81 -82 16 13 4 16 46 20 15 49 20 17 9 52 28 0 0 16 25 52 21 29 31 10 81 -82 16 9 12 16 42 30 15 45 27 17 6 2 27 0 0 16 21 12 21 29 29 9 80 -81 16 4 30 16 37 50 15 40 44 17 1 23 26 0 0 16 15 41 21 29 28 8 80 -80 15 58 59 16 32 21 15 35 12 16 55 56 25 0 0 16 9 22 21 29 26 7 80 -79 15 52 38 16 26 2 15 28 49 16 49 39 24 0 0 16 2 12 21 29 25 6 79 -78 15 45 27 16 18 54 15 21 36 16 42 33 23 0 0 15 54 13 21 29 24 5 79 -77 15 37 26 16 10 57 15 13 32 16 34 38 22 0 0 15 45 24 21 29 23 4 79 -77 15 28 35 16 2 10 15 4 39 16 25 53 21 0 0 15 35 45 21 29 22 3 79 -76 15 18 54 15 52 33 14 54 55 16 16 19 20 0 0 15 25 16 21 29 22 2 78 -75 15 8 23 15 42 6 14 44 20 16 5 56 19 0 0 15 13 56 21 29 22 1 78 -74 14 57 1 15 30 49 14 32 55 .. .. .. Uncertainty in time = +/- 4 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: TYC 0823-00676-1 * constellation : Leo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 09 26 37.7501 DE: +11 42 51.577 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .026 ) * V mag [mag]: 10.3 * B mag [mag]: 11.5 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (398) Admete approx. diameter [km]: 54 approx. diameter ["]: .044 distance from Earth [AU]: 1.70600 * orbital information: orbit source: Preston date of fit: 2012 Nov 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 827 number of rejected observations: 53 time covered by the observations: 1907 Sep 11 - 2012 Nov 13 1 sigma uncertainty ellipse (major, minor, PA): 0.030, 0.014, 118° remarks: * orbital elements for (398) Admete : Mean anomaly = 22.80882890 deg Arg. of pericenter = 158.95692379 deg Long. of node = 279.98881071 deg Inclination = 9.52840518 deg Eccentricity = 0.22450737 Semimajor axis = 2.73812991 AU Perihelion dist = 2.12339958 AU Mag: H = 10.24, G = 0.15 Epoch of elements : MJD 56259.90200000 TDT (2012 Nov 28.902) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 28 398 Admete 21h 38.2m UT 10.3 9 26 37.750 11 42 51.58TYC 0823-00676-1 11.5 14.3 54 5.1 1.706 1.515 -21.29 108.9282 11.720 -147.48 -21.49 21.6361 -0.32999 -0.34267 4.32074 -4.12969 -0.00507 0.00176 2000 20.65482820121119.00000158.956924279.988811 9.5284050.22450737 2.7381299 2.123399610.3 5.00.15 RATE 2.1753190 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.038 0.029 107 1.71 0.031 0 0 1-3 056247.0020121128_0676-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 16, 09:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org